Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (121 commits)
  perf symbols: Increase symbol KSYM_NAME_LEN size
  perf hists browser: Refuse 'a' hotkey on non symbolic views
  perf ui browser: Use libslang to read keys
  perf tools: Fix tracing info recording
  perf hists browser: Elide DSO column when it is set to just one DSO, ditto for threads
  perf hists: Don't consider filtered entries when calculating column widths
  perf hists: Don't decay total_period for filtered entries
  perf hists browser: Honour symbol_conf.show_{nr_samples,total_period}
  perf hists browser: Do not exit on tab key with single event
  perf annotate browser: Don't change selection line when returning from callq
  perf tools: handle endianness of feature bitmap
  perf tools: Add prelink suggestion to dso update message
  perf script: Fix unknown feature comment
  perf hists browser: Apply the dso and thread filters when merging new batches
  perf hists: Move the dso and thread filters from hist_browser
  perf ui browser: Honour the xterm colors
  perf top tui: Give color hints just on the percentage, like on --stdio
  perf ui browser: Make the colors configurable and change the defaults
  perf tui: Remove unneeded call to newtCls on startup
  perf hists: Don't format the percentage on hist_entry__snprintf
  ...

Fix up conflicts in arch/x86/kernel/kprobes.c manually.

Ingo's tree did the insane "add volatile to const array", which just
doesn't make sense ("volatile const"?).  But we could remove the const
*and* make the array volatile to make doubly sure that gcc doesn't
optimize it away..

Also fix up kernel/trace/ring_buffer.c non-data-conflicts manually: the
reader_lock has been turned into a raw lock by the core locking merge,
and there was a new user of it introduced in this perf core merge.  Make
sure that new use also uses the raw accessor functions.

60 files changed, 3447 insertions, 1209 deletions

diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
index 85c5f02..fe6762e 100644
--- a/tools/perf/Documentation/perf-annotate.txt
+++ b/tools/perf/Documentation/perf-annotate.txt
@@ -72,6 +72,19 @@ OPTIONS
 	CPUs are specified with -: 0-2. Default is to report samples on all
 	CPUs.
 
+--asm-raw::
+	Show raw instruction encoding of assembly instructions.
+
+--source::
+	Interleave source code with assembly code. Enabled by default,
+	disable with --no-source.
+
+--symfs=<directory>::
+        Look for files with symbols relative to this directory.
+
+-M::
+--disassembler-style=:: Set disassembler style for objdump.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-report[1]
diff --git a/tools/perf/Documentation/perf-buildid-list.txt b/tools/perf/Documentation/perf-buildid-list.txt
index 5eaac6f..cc22325 100644
--- a/tools/perf/Documentation/perf-buildid-list.txt
+++ b/tools/perf/Documentation/perf-buildid-list.txt
@@ -16,6 +16,9 @@ This command displays the buildids found in a perf.data file, so that other
 tools can be used to fetch packages with matching symbol tables for use by
 perf report.
 
+It can also be used to show the build id of the running kernel or in an ELF
+file using -i/--input.
+
 OPTIONS
 -------
 -H::
@@ -27,6 +30,9 @@ OPTIONS
 -f::
 --force::
 	Don't do ownership validation.
+-k::
+--kernel::
+	Show running kernel build id.
 -v::
 --verbose::
 	Be more verbose.
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 04253c0..212f24d 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -134,6 +134,24 @@ OPTIONS
 	CPUs are specified with -: 0-2. Default is to report samples on all
 	CPUs.
 
+-M::
+--disassembler-style=:: Set disassembler style for objdump.
+
+--source::
+	Interleave source code with assembly code. Enabled by default,
+	disable with --no-source.
+
+--asm-raw::
+	Show raw instruction encoding of assembly instructions.
+
+--show-total-period:: Show a column with the sum of periods.
+
+-I::
+--show-info::
+	Display extended information about the perf.data file. This adds
+	information which may be very large and thus may clutter the display.
+	It currently includes: cpu and numa topology of the host system.
+
 SEE ALSO
 --------
-linkperf:perf-stat[1]
+linkperf:perf-stat[1], linkperf:perf-annotate[1]
diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt
index 46822d5..5b212b5 100644
--- a/tools/perf/Documentation/perf-sched.txt
+++ b/tools/perf/Documentation/perf-sched.txt
@@ -8,7 +8,7 @@ perf-sched - Tool to trace/measure scheduler properties (latencies)
 SYNOPSIS
 --------
 [verse]
-'perf sched' {record|latency|map|replay|trace}
+'perf sched' {record|latency|map|replay|script}
 
 DESCRIPTION
 -----------
@@ -20,8 +20,8 @@ There are five variants of perf sched:
   'perf sched latency' to report the per task scheduling latencies
   and other scheduling properties of the workload.
 
-  'perf sched trace' to see a detailed trace of the workload that
-  was recorded.
+  'perf sched script' to see a detailed trace of the workload that
+   was recorded (aliased to 'perf script' for now).
 
   'perf sched replay' to simulate the workload that was recorded
   via perf sched record. (this is done by starting up mockup threads
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index db01786..dec87ec 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -188,6 +188,13 @@ OPTIONS
 	CPUs are specified with -: 0-2. Default is to report samples on all
 	CPUs.
 
+-I::
+--show-info::
+	Display extended information about the perf.data file. This adds
+	information which may be very large and thus may clutter the display.
+	It currently includes: cpu and numa topology of the host system.
+	It can only be used with the perf script report mode.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-script-perl[1],
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 918cc38..8966b9a 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -94,6 +94,22 @@ an empty cgroup (monitor all the time) using, e.g., -G foo,,bar. Cgroups must ha
 corresponding events, i.e., they always refer to events defined earlier on the command
 line.
 
+-o file::
+--output file::
+Print the output into the designated file.
+
+--append::
+Append to the output file designated with the -o option. Ignored if -o is not specified.
+
+--log-fd::
+
+Log output to fd, instead of stderr.  Complementary to --output, and mutually exclusive
+with it.  --append may be used here.  Examples:
+     3>results  perf stat --log-fd 3          -- $cmd
+     3>>results perf stat --log-fd 3 --append -- $cmd
+
+
+
 EXAMPLES
 --------
 
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index f6eb1cd..b1a5bbb 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -106,6 +106,51 @@ Default is to monitor all CPUS.
 --zero::
 	Zero history across display updates.
 
+-s::
+--sort::
+	Sort by key(s): pid, comm, dso, symbol, parent
+
+-n::
+--show-nr-samples::
+	Show a column with the number of samples.
+
+--show-total-period::
+	Show a column with the sum of periods.
+
+--dsos::
+	Only consider symbols in these dsos.
+
+--comms::
+	Only consider symbols in these comms.
+
+--symbols::
+	Only consider these symbols.
+
+-M::
+--disassembler-style=:: Set disassembler style for objdump.
+
+--source::
+	Interleave source code with assembly code. Enabled by default,
+	disable with --no-source.
+
+--asm-raw::
+	Show raw instruction encoding of assembly instructions.
+
+-G [type,min,order]::
+--call-graph::
+        Display call chains using type, min percent threshold and order.
+	type can be either:
+	- flat: single column, linear exposure of call chains.
+	- graph: use a graph tree, displaying absolute overhead rates.
+	- fractal: like graph, but displays relative rates. Each branch of
+		 the tree is considered as a new profiled object.
+
+	order can be either:
+	- callee: callee based call graph.
+	- caller: inverted caller based call graph.
+
+	Default: fractal,0.5,callee.
+
 INTERACTIVE PROMPTING KEYS
 --------------------------
 
@@ -130,9 +175,6 @@ INTERACTIVE PROMPTING KEYS
 [S]::
 	Stop annotation, return to full profile display.
 
-[w]::
-	Toggle between weighted sum and individual count[E]r profile.
-
 [z]::
 	Toggle event count zeroing across display updates.
 
diff --git a/tools/perf/Documentation/perfconfig.example b/tools/perf/Documentation/perfconfig.example
new file mode 100644
index 0000000..d144866
--- /dev/null
+++ b/tools/perf/Documentation/perfconfig.example
@@ -0,0 +1,20 @@
+[colors]
+
+	# These were the old defaults
+	top = red, lightgray
+	medium = green, lightgray
+	normal = black, lightgray
+	selected = lightgray, magenta
+	code = blue, lightgray
+
+[tui]
+
+	# Defaults if linked with libslang
+	report = on
+	annotate = on
+	top = on
+
+[buildid]
+
+	# Default, disable using /dev/null
+	dir = /root/.debug
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index e9d5c27..b98e307 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -466,13 +466,13 @@ else
 		LIB_OBJS += $(OUTPUT)util/ui/browsers/annotate.o
 		LIB_OBJS += $(OUTPUT)util/ui/browsers/hists.o
 		LIB_OBJS += $(OUTPUT)util/ui/browsers/map.o
-		LIB_OBJS += $(OUTPUT)util/ui/browsers/top.o
 		LIB_OBJS += $(OUTPUT)util/ui/helpline.o
 		LIB_OBJS += $(OUTPUT)util/ui/progress.o
 		LIB_OBJS += $(OUTPUT)util/ui/util.o
 		LIB_H += util/ui/browser.h
 		LIB_H += util/ui/browsers/map.h
 		LIB_H += util/ui/helpline.h
+		LIB_H += util/ui/keysyms.h
 		LIB_H += util/ui/libslang.h
 		LIB_H += util/ui/progress.h
 		LIB_H += util/ui/util.h
@@ -729,9 +729,6 @@ $(OUTPUT)util/ui/browser.o: util/ui/browser.c $(OUTPUT)PERF-CFLAGS
 $(OUTPUT)util/ui/browsers/annotate.o: util/ui/browsers/annotate.c $(OUTPUT)PERF-CFLAGS
 	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DENABLE_SLFUTURE_CONST $<
 
-$(OUTPUT)util/ui/browsers/top.o: util/ui/browsers/top.c $(OUTPUT)PERF-CFLAGS
-	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DENABLE_SLFUTURE_CONST $<
-
 $(OUTPUT)util/ui/browsers/hists.o: util/ui/browsers/hists.c $(OUTPUT)PERF-CFLAGS
 	$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DENABLE_SLFUTURE_CONST $<
 
diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/powerpc/Makefile
index 15130b50..744e629 100644
--- a/tools/perf/arch/powerpc/Makefile
+++ b/tools/perf/arch/powerpc/Makefile
@@ -2,3 +2,4 @@ ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
 endif
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c
new file mode 100644
index 0000000..eba80c2
--- /dev/null
+++ b/tools/perf/arch/powerpc/util/header.c
@@ -0,0 +1,36 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../../util/header.h"
+
+#define __stringify_1(x)        #x
+#define __stringify(x)          __stringify_1(x)
+
+#define mfspr(rn)       ({unsigned long rval; \
+			 asm volatile("mfspr %0," __stringify(rn) \
+				      : "=r" (rval)); rval; })
+
+#define SPRN_PVR        0x11F	/* Processor Version Register */
+#define PVR_VER(pvr)    (((pvr) >>  16) & 0xFFFF) /* Version field */
+#define PVR_REV(pvr)    (((pvr) >>   0) & 0xFFFF) /* Revison field */
+
+int
+get_cpuid(char *buffer, size_t sz)
+{
+	unsigned long pvr;
+	int nb;
+
+	pvr = mfspr(SPRN_PVR);
+
+	nb = snprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
+
+	/* look for end marker to ensure the entire data fit */
+	if (strchr(buffer, '$')) {
+		buffer[nb-1] = '\0';
+		return 0;
+	}
+	return -1;
+}
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
index 15130b50..744e629 100644
--- a/tools/perf/arch/x86/Makefile
+++ b/tools/perf/arch/x86/Makefile
@@ -2,3 +2,4 @@ ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
 endif
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c
new file mode 100644
index 0000000..f940060
--- /dev/null
+++ b/tools/perf/arch/x86/util/header.c
@@ -0,0 +1,59 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../../util/header.h"
+
+static inline void
+cpuid(unsigned int op, unsigned int *a, unsigned int *b, unsigned int *c,
+      unsigned int *d)
+{
+	__asm__ __volatile__ (".byte 0x53\n\tcpuid\n\t"
+			      "movl %%ebx, %%esi\n\t.byte 0x5b"
+			: "=a" (*a),
+			"=S" (*b),
+			"=c" (*c),
+			"=d" (*d)
+			: "a" (op));
+}
+
+int
+get_cpuid(char *buffer, size_t sz)
+{
+	unsigned int a, b, c, d, lvl;
+	int family = -1, model = -1, step = -1;
+	int nb;
+	char vendor[16];
+
+	cpuid(0, &lvl, &b, &c, &d);
+	strncpy(&vendor[0], (char *)(&b), 4);
+	strncpy(&vendor[4], (char *)(&d), 4);
+	strncpy(&vendor[8], (char *)(&c), 4);
+	vendor[12] = '\0';
+
+	if (lvl >= 1) {
+		cpuid(1, &a, &b, &c, &d);
+
+		family = (a >> 8) & 0xf;  /* bits 11 - 8 */
+		model  = (a >> 4) & 0xf;  /* Bits  7 - 4 */
+		step   = a & 0xf;
+
+		/* extended family */
+		if (family == 0xf)
+			family += (a >> 20) & 0xff;
+
+		/* extended model */
+		if (family >= 0x6)
+			model += ((a >> 16) & 0xf) << 4;
+	}
+	nb = snprintf(buffer, sz, "%s,%u,%u,%u$", vendor, family, model, step);
+
+	/* look for end marker to ensure the entire data fit */
+	if (strchr(buffer, '$')) {
+		buffer[nb-1] = '\0';
+		return 0;
+	}
+	return -1;
+}
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 555aefd..46b4c24 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -114,10 +114,11 @@ static int hist_entry__tty_annotate(struct hist_entry *he, int evidx)
 				    print_line, full_paths, 0, 0);
 }
 
-static void hists__find_annotations(struct hists *self, int evidx)
+static void hists__find_annotations(struct hists *self, int evidx,
+				    int nr_events)
 {
 	struct rb_node *nd = rb_first(&self->entries), *next;
-	int key = KEY_RIGHT;
+	int key = K_RIGHT;
 
 	while (nd) {
 		struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
@@ -129,7 +130,7 @@ static void hists__find_annotations(struct hists *self, int evidx)
 		notes = symbol__annotation(he->ms.sym);
 		if (notes->src == NULL) {
 find_next:
-			if (key == KEY_LEFT)
+			if (key == K_LEFT)
 				nd = rb_prev(nd);
 			else
 				nd = rb_next(nd);
@@ -137,12 +138,13 @@ find_next:
 		}
 
 		if (use_browser > 0) {
-			key = hist_entry__tui_annotate(he, evidx);
+			key = hist_entry__tui_annotate(he, evidx, nr_events,
+						       NULL, NULL, 0);
 			switch (key) {
-			case KEY_RIGHT:
+			case K_RIGHT:
 				next = rb_next(nd);
 				break;
-			case KEY_LEFT:
+			case K_LEFT:
 				next = rb_prev(nd);
 				break;
 			default:
@@ -215,7 +217,8 @@ static int __cmd_annotate(void)
 			total_nr_samples += nr_samples;
 			hists__collapse_resort(hists);
 			hists__output_resort(hists);
-			hists__find_annotations(hists, pos->idx);
+			hists__find_annotations(hists, pos->idx,
+						session->evlist->nr_entries);
 		}
 	}
 
@@ -267,6 +270,14 @@ static const struct option options[] = {
 	OPT_BOOLEAN('P', "full-paths", &full_paths,
 		    "Don't shorten the displayed pathnames"),
 	OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
+	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+		   "Look for files with symbols relative to this directory"),
+	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
+		    "Interleave source code with assembly code (default)"),
+	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
+		    "Display raw encoding of assembly instructions (default)"),
+	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
+		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
 	OPT_END()
 };
 
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 5af32ae..cb690a6 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -1,7 +1,8 @@
 /*
  * builtin-buildid-list.c
  *
- * Builtin buildid-list command: list buildids in perf.data
+ * Builtin buildid-list command: list buildids in perf.data, in the running
+ * kernel and in ELF files.
  *
  * Copyright (C) 2009, Red Hat Inc.
  * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
@@ -15,8 +16,11 @@
 #include "util/session.h"
 #include "util/symbol.h"
 
+#include <libelf.h>
+
 static char const *input_name = "perf.data";
 static bool force;
+static bool show_kernel;
 static bool with_hits;
 
 static const char * const buildid_list_usage[] = {
@@ -29,12 +33,13 @@ static const struct option options[] = {
 	OPT_STRING('i', "input", &input_name, "file",
 		    "input file name"),
 	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
+	OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
 	OPT_INCR('v', "verbose", &verbose,
 		    "be more verbose"),
 	OPT_END()
 };
 
-static int __cmd_buildid_list(void)
+static int perf_session__list_build_ids(void)
 {
 	struct perf_session *session;
 
@@ -52,6 +57,49 @@ static int __cmd_buildid_list(void)
 	return 0;
 }
 
+static int sysfs__fprintf_build_id(FILE *fp)
+{
+	u8 kallsyms_build_id[BUILD_ID_SIZE];
+	char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+
+	if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
+				 sizeof(kallsyms_build_id)) != 0)
+		return -1;
+
+	build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
+			  sbuild_id);
+	fprintf(fp, "%s\n", sbuild_id);
+	return 0;
+}
+
+static int filename__fprintf_build_id(const char *name, FILE *fp)
+{
+	u8 build_id[BUILD_ID_SIZE];
+	char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+
+	if (filename__read_build_id(name, build_id,
+				    sizeof(build_id)) != sizeof(build_id))
+		return 0;
+
+	build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
+	return fprintf(fp, "%s\n", sbuild_id);
+}
+
+static int __cmd_buildid_list(void)
+{
+	if (show_kernel)
+		return sysfs__fprintf_build_id(stdout);
+
+	elf_version(EV_CURRENT);
+	/*
+ 	 * See if this is an ELF file first:
+ 	 */
+	if (filename__fprintf_build_id(input_name, stdout))
+		return 0;
+
+	return perf_session__list_build_ids();
+}
+
 int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
 {
 	argc = parse_options(argc, argv, options, buildid_list_usage, 0);
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index e821999..b39f3a1 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -162,7 +162,7 @@ static int __cmd_diff(void)
 
 	hists__match(&session[0]->hists, &session[1]->hists);
 	hists__fprintf(&session[1]->hists, &session[0]->hists,
-		       show_displacement, stdout);
+		       show_displacement, true, 0, 0, stdout);
 out_delete:
 	for (i = 0; i < 2; ++i)
 		perf_session__delete(session[i]);
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f4c3fbe..f82480f 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -73,6 +73,7 @@ static off_t			post_processing_offset;
 
 static struct perf_session	*session;
 static const char		*cpu_list;
+static const char               *progname;
 
 static void advance_output(size_t size)
 {
@@ -137,17 +138,29 @@ static void mmap_read(struct perf_mmap *md)
 
 static volatile int done = 0;
 static volatile int signr = -1;
+static volatile int child_finished = 0;
 
 static void sig_handler(int sig)
 {
+	if (sig == SIGCHLD)
+		child_finished = 1;
+
 	done = 1;
 	signr = sig;
 }
 
 static void sig_atexit(void)
 {
-	if (child_pid > 0)
-		kill(child_pid, SIGTERM);
+	int status;
+
+	if (child_pid > 0) {
+		if (!child_finished)
+			kill(child_pid, SIGTERM);
+
+		wait(&status);
+		if (WIFSIGNALED(status))
+			psignal(WTERMSIG(status), progname);
+	}
 
 	if (signr == -1 || signr == SIGUSR1)
 		return;
@@ -446,6 +459,8 @@ static int __cmd_record(int argc, const char **argv)
 	char buf;
 	struct machine *machine;
 
+	progname = argv[0];
+
 	page_size = sysconf(_SC_PAGE_SIZE);
 
 	atexit(sig_atexit);
@@ -514,6 +529,19 @@ static int __cmd_record(int argc, const char **argv)
 	if (have_tracepoints(&evsel_list->entries))
 		perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
 
+	perf_header__set_feat(&session->header, HEADER_HOSTNAME);
+	perf_header__set_feat(&session->header, HEADER_OSRELEASE);
+	perf_header__set_feat(&session->header, HEADER_ARCH);
+	perf_header__set_feat(&session->header, HEADER_CPUDESC);
+	perf_header__set_feat(&session->header, HEADER_NRCPUS);
+	perf_header__set_feat(&session->header, HEADER_EVENT_DESC);
+	perf_header__set_feat(&session->header, HEADER_CMDLINE);
+	perf_header__set_feat(&session->header, HEADER_VERSION);
+	perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
+	perf_header__set_feat(&session->header, HEADER_TOTAL_MEM);
+	perf_header__set_feat(&session->header, HEADER_NUMA_TOPOLOGY);
+	perf_header__set_feat(&session->header, HEADER_CPUID);
+
 	/* 512 kiB: default amount of unprivileged mlocked memory */
 	if (mmap_pages == UINT_MAX)
 		mmap_pages = (512 * 1024) / page_size;
@@ -785,6 +813,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
 	int err = -ENOMEM;
 	struct perf_evsel *pos;
 
+	perf_header__set_cmdline(argc, argv);
+
 	evsel_list = perf_evlist__new(NULL, NULL);
 	if (evsel_list == NULL)
 		return -ENOMEM;
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index d7ff277..4d7c834 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -40,6 +40,7 @@ static char		const *input_name = "perf.data";
 static bool		force, use_tui, use_stdio;
 static bool		hide_unresolved;
 static bool		dont_use_callchains;
+static bool		show_full_info;
 
 static bool		show_threads;
 static struct perf_read_values	show_threads_values;
@@ -229,13 +230,10 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
 
 	list_for_each_entry(pos, &evlist->entries, node) {
 		struct hists *hists = &pos->hists;
-		const char *evname = NULL;
-
-		if (rb_first(&hists->entries) != rb_last(&hists->entries))
-			evname = event_name(pos);
+		const char *evname = event_name(pos);
 
 		hists__fprintf_nr_sample_events(hists, evname, stdout);
-		hists__fprintf(hists, NULL, false, stdout);
+		hists__fprintf(hists, NULL, false, true, 0, 0, stdout);
 		fprintf(stdout, "\n\n");
 	}
 
@@ -276,6 +274,9 @@ static int __cmd_report(void)
 			goto out_delete;
 	}
 
+	if (use_browser <= 0)
+		perf_session__fprintf_info(session, stdout, show_full_info);
+
 	if (show_threads)
 		perf_read_values_init(&show_threads_values);
 
@@ -330,9 +331,10 @@ static int __cmd_report(void)
 		goto out_delete;
 	}
 
-	if (use_browser > 0)
-		perf_evlist__tui_browse_hists(session->evlist, help);
-	else
+	if (use_browser > 0) {
+		perf_evlist__tui_browse_hists(session->evlist, help,
+					      NULL, NULL, 0);
+	} else
 		perf_evlist__tty_browse_hists(session->evlist, help);
 
 out_delete:
@@ -487,6 +489,16 @@ static const struct option options[] = {
 	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
 		    "Look for files with symbols relative to this directory"),
 	OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
+	OPT_BOOLEAN('I', "show-info", &show_full_info,
+		    "Display extended information about perf.data file"),
+	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
+		    "Interleave source code with assembly code (default)"),
+	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
+		    "Display raw encoding of assembly instructions (default)"),
+	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
+		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
+	OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
+		    "Show a column with the sum of periods"),
 	OPT_END()
 };
 
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 09024ec..2f62a29 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -22,6 +22,7 @@ static u64			last_timestamp;
 static u64			nr_unordered;
 extern const struct option	record_options[];
 static bool			no_callchain;
+static bool			show_full_info;
 static const char		*cpu_list;
 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 
@@ -1083,7 +1084,8 @@ static const struct option options[] = {
 		     "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr",
 		     parse_output_fields),
 	OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
-
+	OPT_BOOLEAN('I', "show-info", &show_full_info,
+		    "display extended information from perf.data file"),
 	OPT_END()
 };
 
@@ -1268,6 +1270,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
 			return -1;
 	}
 
+	perf_session__fprintf_info(session, stdout, show_full_info);
+
 	if (!no_callchain)
 		symbol_conf.use_callchain = true;
 	else
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 5deb17d..7ce65f5 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -194,6 +194,9 @@ static const char		*cpu_list;
 static const char		*csv_sep			= NULL;
 static bool			csv_output			= false;
 static bool			group				= false;
+static const char		*output_name			= NULL;
+static FILE			*output				= NULL;
+static int			output_fd;
 
 static volatile int done = 0;
 
@@ -251,8 +254,13 @@ static double avg_stats(struct stats *stats)
  */
 static double stddev_stats(struct stats *stats)
 {
-	double variance = stats->M2 / (stats->n - 1);
-	double variance_mean = variance / stats->n;
+	double variance, variance_mean;
+
+	if (!stats->n)
+		return 0.0;
+
+	variance = stats->M2 / (stats->n - 1);
+	variance_mean = variance / stats->n;
 
 	return sqrt(variance_mean);
 }
@@ -352,7 +360,7 @@ static int read_counter_aggr(struct perf_evsel *counter)
 		update_stats(&ps->res_stats[i], count[i]);
 
 	if (verbose) {
-		fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
+		fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 			event_name(counter), count[0], count[1], count[2]);
 	}
 
@@ -487,6 +495,8 @@ static int run_perf_stat(int argc __used, const char **argv)
 	if (forks) {
 		close(go_pipe[1]);
 		wait(&status);
+		if (WIFSIGNALED(status))
+			psignal(WTERMSIG(status), argv[0]);
 	} else {
 		while(!done) sleep(1);
 	}
@@ -519,9 +529,9 @@ static void print_noise_pct(double total, double avg)
 		pct = 100.0*total/avg;
 
 	if (csv_output)
-		fprintf(stderr, "%s%.2f%%", csv_sep, pct);
-	else
-		fprintf(stderr, "  ( +-%6.2f%% )", pct);
+		fprintf(output, "%s%.2f%%", csv_sep, pct);
+	else if (pct)
+		fprintf(output, "  ( +-%6.2f%% )", pct);
 }
 
 static void print_noise(struct perf_evsel *evsel, double avg)
@@ -546,16 +556,17 @@ static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
 			csv_output ? 0 : -4,
 			evsel_list->cpus->map[cpu], csv_sep);
 
-	fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
+	fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
 
 	if (evsel->cgrp)
-		fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
+		fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 
 	if (csv_output)
 		return;
 
 	if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
-		fprintf(stderr, " # %8.3f CPUs utilized          ", avg / avg_stats(&walltime_nsecs_stats));
+		fprintf(output, " # %8.3f CPUs utilized          ",
+			avg / avg_stats(&walltime_nsecs_stats));
 }
 
 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -576,9 +587,9 @@ static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __us
 	else if (ratio > 10.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " frontend cycles idle   ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " frontend cycles idle   ");
 }
 
 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -599,9 +610,9 @@ static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __use
 	else if (ratio > 20.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " backend  cycles idle   ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " backend  cycles idle   ");
 }
 
 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -622,9 +633,9 @@ static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double
 	else if (ratio > 5.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " of all branches        ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " of all branches        ");
 }
 
 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -645,9 +656,9 @@ static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, dou
 	else if (ratio > 5.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " of all L1-dcache hits  ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " of all L1-dcache hits  ");
 }
 
 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -668,9 +679,9 @@ static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, dou
 	else if (ratio > 5.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " of all L1-icache hits  ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " of all L1-icache hits  ");
 }
 
 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -691,9 +702,9 @@ static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do
 	else if (ratio > 5.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " of all dTLB cache hits ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " of all dTLB cache hits ");
 }
 
 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -714,9 +725,9 @@ static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do
 	else if (ratio > 5.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " of all iTLB cache hits ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " of all iTLB cache hits ");
 }
 
 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
@@ -737,9 +748,9 @@ static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, doub
 	else if (ratio > 5.0)
 		color = PERF_COLOR_YELLOW;
 
-	fprintf(stderr, " #  ");
-	color_fprintf(stderr, color, "%6.2f%%", ratio);
-	fprintf(stderr, " of all LL-cache hits   ");
+	fprintf(output, " #  ");
+	color_fprintf(output, color, "%6.2f%%", ratio);
+	fprintf(output, " of all LL-cache hits   ");
 }
 
 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
@@ -762,10 +773,10 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 	else
 		cpu = 0;
 
-	fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
+	fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
 
 	if (evsel->cgrp)
-		fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
+		fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 
 	if (csv_output)
 		return;
@@ -776,14 +787,14 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 		if (total)
 			ratio = avg / total;
 
-		fprintf(stderr, " #   %5.2f  insns per cycle        ", ratio);
+		fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 
 		total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 		total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 
 		if (total && avg) {
 			ratio = total / avg;
-			fprintf(stderr, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
+			fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
 		}
 
 	} else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
@@ -831,7 +842,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 		if (total)
 			ratio = avg * 100 / total;
 
-		fprintf(stderr, " # %8.3f %% of all cache refs    ", ratio);
+		fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
 
 	} else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
 		print_stalled_cycles_frontend(cpu, evsel, avg);
@@ -843,16 +854,16 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 		if (total)
 			ratio = 1.0 * avg / total;
 
-		fprintf(stderr, " # %8.3f GHz                    ", ratio);
+		fprintf(output, " # %8.3f GHz                    ", ratio);
 	} else if (runtime_nsecs_stats[cpu].n != 0) {
 		total = avg_stats(&runtime_nsecs_stats[cpu]);
 
 		if (total)
 			ratio = 1000.0 * avg / total;
 
-		fprintf(stderr, " # %8.3f M/sec                  ", ratio);
+		fprintf(output, " # %8.3f M/sec                  ", ratio);
 	} else {
-		fprintf(stderr, "                                   ");
+		fprintf(output, "                                   ");
 	}
 }
 
@@ -867,7 +878,7 @@ static void print_counter_aggr(struct perf_evsel *counter)
 	int scaled = counter->counts->scaled;
 
 	if (scaled == -1) {
-		fprintf(stderr, "%*s%s%*s",
+		fprintf(output, "%*s%s%*s",
 			csv_output ? 0 : 18,
 			counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
 			csv_sep,
@@ -875,9 +886,9 @@ static void print_counter_aggr(struct perf_evsel *counter)
 			event_name(counter));
 
 		if (counter->cgrp)
-			fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
+			fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
 
-		fputc('\n', stderr);
+		fputc('\n', output);
 		return;
 	}
 
@@ -889,7 +900,7 @@ static void print_counter_aggr(struct perf_evsel *counter)
 	print_noise(counter, avg);
 
 	if (csv_output) {
-		fputc('\n', stderr);
+		fputc('\n', output);
 		return;
 	}
 
@@ -899,9 +910,9 @@ static void print_counter_aggr(struct perf_evsel *counter)
 		avg_enabled = avg_stats(&ps->res_stats[1]);
 		avg_running = avg_stats(&ps->res_stats[2]);
 
-		fprintf(stderr, " [%5.2f%%]", 100 * avg_running / avg_enabled);
+		fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
 	}
-	fprintf(stderr, "\n");
+	fprintf(output, "\n");
 }
 
 /*
@@ -918,7 +929,7 @@ static void print_counter(struct perf_evsel *counter)
 		ena = counter->counts->cpu[cpu].ena;
 		run = counter->counts->cpu[cpu].run;
 		if (run == 0 || ena == 0) {
-			fprintf(stderr, "CPU%*d%s%*s%s%*s",
+			fprintf(output, "CPU%*d%s%*s%s%*s",
 				csv_output ? 0 : -4,
 				evsel_list->cpus->map[cpu], csv_sep,
 				csv_output ? 0 : 18,
@@ -928,9 +939,10 @@ static void print_counter(struct perf_evsel *counter)
 				event_name(counter));
 
 			if (counter->cgrp)
-				fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
+				fprintf(output, "%s%s",
+					csv_sep, counter->cgrp->name);
 
-			fputc('\n', stderr);
+			fputc('\n', output);
 			continue;
 		}
 
@@ -943,9 +955,10 @@ static void print_counter(struct perf_evsel *counter)
 			print_noise(counter, 1.0);
 
 			if (run != ena)
-				fprintf(stderr, "  (%.2f%%)", 100.0 * run / ena);
+				fprintf(output, "  (%.2f%%)",
+					100.0 * run / ena);
 		}
-		fputc('\n', stderr);
+		fputc('\n', output);
 	}
 }
 
@@ -957,21 +970,21 @@ static void print_stat(int argc, const char **argv)
 	fflush(stdout);
 
 	if (!csv_output) {
-		fprintf(stderr, "\n");
-		fprintf(stderr, " Performance counter stats for ");
+		fprintf(output, "\n");
+		fprintf(output, " Performance counter stats for ");
 		if(target_pid == -1 && target_tid == -1) {
-			fprintf(stderr, "\'%s", argv[0]);
+			fprintf(output, "\'%s", argv[0]);
 			for (i = 1; i < argc; i++)
-				fprintf(stderr, " %s", argv[i]);
+				fprintf(output, " %s", argv[i]);
 		} else if (target_pid != -1)
-			fprintf(stderr, "process id \'%d", target_pid);
+			fprintf(output, "process id \'%d", target_pid);
 		else
-			fprintf(stderr, "thread id \'%d", target_tid);
+			fprintf(output, "thread id \'%d", target_tid);
 
-		fprintf(stderr, "\'");
+		fprintf(output, "\'");
 		if (run_count > 1)
-			fprintf(stderr, " (%d runs)", run_count);
-		fprintf(stderr, ":\n\n");
+			fprintf(output, " (%d runs)", run_count);
+		fprintf(output, ":\n\n");
 	}
 
 	if (no_aggr) {
@@ -984,15 +997,15 @@ static void print_stat(int argc, const char **argv)
 
 	if (!csv_output) {
 		if (!null_run)
-			fprintf(stderr, "\n");
-		fprintf(stderr, " %17.9f seconds time elapsed",
+			fprintf(output, "\n");
+		fprintf(output, " %17.9f seconds time elapsed",
 				avg_stats(&walltime_nsecs_stats)/1e9);
 		if (run_count > 1) {
-			fprintf(stderr, "                                        ");
+			fprintf(output, "                                        ");
 			print_noise_pct(stddev_stats(&walltime_nsecs_stats),
 					avg_stats(&walltime_nsecs_stats));
 		}
-		fprintf(stderr, "\n\n");
+		fprintf(output, "\n\n");
 	}
 }
 
@@ -1030,6 +1043,8 @@ static int stat__set_big_num(const struct option *opt __used,
 	return 0;
 }
 
+static bool append_file;
+
 static const struct option options[] = {
 	OPT_CALLBACK('e', "event", &evsel_list, "event",
 		     "event selector. use 'perf list' to list available events",
@@ -1070,6 +1085,11 @@ static const struct option options[] = {
 	OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
 		     "monitor event in cgroup name only",
 		     parse_cgroups),
+	OPT_STRING('o', "output", &output_name, "file",
+		    "output file name"),
+	OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
+	OPT_INTEGER(0, "log-fd", &output_fd,
+		    "log output to fd, instead of stderr"),
 	OPT_END()
 };
 
@@ -1141,6 +1161,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
 {
 	struct perf_evsel *pos;
 	int status = -ENOMEM;
+	const char *mode;
 
 	setlocale(LC_ALL, "");
 
@@ -1151,16 +1172,46 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
 	argc = parse_options(argc, argv, options, stat_usage,
 		PARSE_OPT_STOP_AT_NON_OPTION);
 
-	if (csv_sep)
+	output = stderr;
+	if (output_name && strcmp(output_name, "-"))
+		output = NULL;
+
+	if (output_name && output_fd) {
+		fprintf(stderr, "cannot use both --output and --log-fd\n");
+		usage_with_options(stat_usage, options);
+	}
+	if (!output) {
+		struct timespec tm;
+		mode = append_file ? "a" : "w";
+
+		output = fopen(output_name, mode);
+		if (!output) {
+			perror("failed to create output file");
+			exit(-1);
+		}
+		clock_gettime(CLOCK_REALTIME, &tm);
+		fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
+	} else if (output_fd != 2) {
+		mode = append_file ? "a" : "w";
+		output = fdopen(output_fd, mode);
+		if (!output) {
+			perror("Failed opening logfd");
+			return -errno;
+		}
+	}
+
+	if (csv_sep) {
 		csv_output = true;
-	else
+		if (!strcmp(csv_sep, "\\t"))
+			csv_sep = "\t";
+	} else
 		csv_sep = DEFAULT_SEPARATOR;
 
 	/*
 	 * let the spreadsheet do the pretty-printing
 	 */
 	if (csv_output) {
-		/* User explicitely passed -B? */
+		/* User explicitly passed -B? */
 		if (big_num_opt == 1) {
 			fprintf(stderr, "-B option not supported with -x\n");
 			usage_with_options(stat_usage, options);
@@ -1226,7 +1277,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
 	status = 0;
 	for (run_idx = 0; run_idx < run_count; run_idx++) {
 		if (run_count != 1 && verbose)
-			fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
+			fprintf(output, "[ perf stat: executing run #%d ... ]\n",
+				run_idx + 1);
 
 		if (sync_run)
 			sync();
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index d28013b..7a87171 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -5,6 +5,7 @@
  * any workload, CPU or specific PID.
  *
  * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ *		 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
  *
  * Improvements and fixes by:
  *
@@ -36,6 +37,7 @@
 #include "util/parse-events.h"
 #include "util/cpumap.h"
 #include "util/xyarray.h"
+#include "util/sort.h"
 
 #include "util/debug.h"
 
@@ -65,12 +67,8 @@
 static struct perf_top top = {
 	.count_filter		= 5,
 	.delay_secs		= 2,
-	.display_weighted	= -1,
 	.target_pid		= -1,
 	.target_tid		= -1,
-	.active_symbols		= LIST_HEAD_INIT(top.active_symbols),
-	.active_symbols_lock	= PTHREAD_MUTEX_INITIALIZER,
-	.active_symbols_cond	= PTHREAD_COND_INITIALIZER,
 	.freq			= 1000, /* 1 KHz */
 };
 
@@ -78,6 +76,12 @@ static bool			system_wide			=  false;
 
 static bool			use_tui, use_stdio;
 
+static bool			sort_has_symbols;
+
+static bool			dont_use_callchains;
+static char			callchain_default_opt[]		= "fractal,0.5,callee";
+
+
 static int			default_interval		=      0;
 
 static bool			kptr_restrict_warned;
@@ -85,7 +89,6 @@ static bool			vmlinux_warned;
 static bool			inherit				=  false;
 static int			realtime_prio			=      0;
 static bool			group				=  false;
-static unsigned int		page_size;
 static unsigned int		mmap_pages			=    128;
 
 static bool			dump_symtab                     =  false;
@@ -93,7 +96,6 @@ static bool			dump_symtab                     =  false;
 static struct winsize		winsize;
 
 static const char		*sym_filter			=   NULL;
-struct sym_entry		*sym_filter_entry_sched		=   NULL;
 static int			sym_pcnt_filter			=      5;
 
 /*
@@ -136,18 +138,18 @@ static void sig_winch_handler(int sig __used)
 	update_print_entries(&winsize);
 }
 
-static int parse_source(struct sym_entry *syme)
+static int parse_source(struct hist_entry *he)
 {
 	struct symbol *sym;
 	struct annotation *notes;
 	struct map *map;
 	int err = -1;
 
-	if (!syme)
+	if (!he || !he->ms.sym)
 		return -1;
 
-	sym = sym_entry__symbol(syme);
-	map = syme->map;
+	sym = he->ms.sym;
+	map = he->ms.map;
 
 	/*
 	 * We can't annotate with just /proc/kallsyms
@@ -175,53 +177,62 @@ static int parse_source(struct sym_entry *syme)
 		return err;
 	}
 
-	err = symbol__annotate(sym, syme->map, 0);
+	err = symbol__annotate(sym, map, 0);
 	if (err == 0) {
 out_assign:
-		top.sym_filter_entry = syme;
+		top.sym_filter_entry = he;
 	}
 
 	pthread_mutex_unlock(&notes->lock);
 	return err;
 }
 
-static void __zero_source_counters(struct sym_entry *syme)
+static void __zero_source_counters(struct hist_entry *he)
 {
-	struct symbol *sym = sym_entry__symbol(syme);
+	struct symbol *sym = he->ms.sym;
 	symbol__annotate_zero_histograms(sym);
 }
 
-static void record_precise_ip(struct sym_entry *syme, struct map *map,
-			      int counter, u64 ip)
+static void record_precise_ip(struct hist_entry *he, int counter, u64 ip)
 {
 	struct annotation *notes;
 	struct symbol *sym;
 
-	if (syme != top.sym_filter_entry)
+	if (he == NULL || he->ms.sym == NULL ||
+	    (he != top.sym_filter_entry && use_browser != 1))
 		return;
 
-	sym = sym_entry__symbol(syme);
+	sym = he->ms.sym;
 	notes = symbol__annotation(sym);
 
 	if (pthread_mutex_trylock(&notes->lock))
 		return;
 
-	ip = map->map_ip(map, ip);
-	symbol__inc_addr_samples(sym, map, counter, ip);
+	if (notes->src == NULL &&
+	    symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
+		pthread_mutex_unlock(&notes->lock);
+		pr_err("Not enough memory for annotating '%s' symbol!\n",
+		       sym->name);
+		sleep(1);
+		return;
+	}
+
+	ip = he->ms.map->map_ip(he->ms.map, ip);
+	symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
 
 	pthread_mutex_unlock(&notes->lock);
 }
 
-static void show_details(struct sym_entry *syme)
+static void show_details(struct hist_entry *he)
 {
 	struct annotation *notes;
 	struct symbol *symbol;
 	int more;
 
-	if (!syme)
+	if (!he)
 		return;
 
-	symbol = sym_entry__symbol(syme);
+	symbol = he->ms.sym;
 	notes = symbol__annotation(symbol);
 
 	pthread_mutex_lock(&notes->lock);
@@ -232,7 +243,7 @@ static void show_details(struct sym_entry *syme)
 	printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name);
 	printf("  Events  Pcnt (>=%d%%)\n", sym_pcnt_filter);
 
-	more = symbol__annotate_printf(symbol, syme->map, top.sym_evsel->idx,
+	more = symbol__annotate_printf(symbol, he->ms.map, top.sym_evsel->idx,
 				       0, sym_pcnt_filter, top.print_entries, 4);
 	if (top.zero)
 		symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx);
@@ -246,21 +257,28 @@ out_unlock:
 
 static const char		CONSOLE_CLEAR[] = "";
 
-static void __list_insert_active_sym(struct sym_entry *syme)
+static struct hist_entry *
+	perf_session__add_hist_entry(struct perf_session *session,
+				     struct addr_location *al,
+				     struct perf_sample *sample,
+				     struct perf_evsel *evsel)
 {
-	list_add(&syme->node, &top.active_symbols);
+	struct hist_entry *he;
+
+	he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
+	if (he == NULL)
+		return NULL;
+
+	session->hists.stats.total_period += sample->period;
+	hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
+	return he;
 }
 
-static void print_sym_table(struct perf_session *session)
+static void print_sym_table(void)
 {
 	char bf[160];
 	int printed = 0;
-	struct rb_node *nd;
-	struct sym_entry *syme;
-	struct rb_root tmp = RB_ROOT;
 	const int win_width = winsize.ws_col - 1;
-	int sym_width, dso_width, dso_short_width;
-	float sum_ksamples = perf_top__decay_samples(&top, &tmp);
 
 	puts(CONSOLE_CLEAR);
 
@@ -271,10 +289,12 @@ static void print_sym_table(struct perf_session *session)
 
 	printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 
-	if (session->hists.stats.total_lost != 0) {
+	if (top.total_lost_warned != top.session->hists.stats.total_lost) {
+		top.total_lost_warned = top.session->hists.stats.total_lost;
 		color_fprintf(stdout, PERF_COLOR_RED, "WARNING:");
 		printf(" LOST %" PRIu64 " events, Check IO/CPU overload\n",
-		       session->hists.stats.total_lost);
+		       top.total_lost_warned);
+		++printed;
 	}
 
 	if (top.sym_filter_entry) {
@@ -282,58 +302,15 @@ static void print_sym_table(struct perf_session *session)
 		return;
 	}
 
-	perf_top__find_widths(&top, &tmp, &dso_width, &dso_short_width,
-			      &sym_width);
-
-	if (sym_width + dso_width > winsize.ws_col - 29) {
-		dso_width = dso_short_width;
-		if (sym_width + dso_width > winsize.ws_col - 29)
-			sym_width = winsize.ws_col - dso_width - 29;
-	}
+	hists__collapse_resort_threaded(&top.sym_evsel->hists);
+	hists__output_resort_threaded(&top.sym_evsel->hists);
+	hists__decay_entries_threaded(&top.sym_evsel->hists,
+				      top.hide_user_symbols,
+				      top.hide_kernel_symbols);
+	hists__output_recalc_col_len(&top.sym_evsel->hists, winsize.ws_row - 3);
 	putchar('\n');
-	if (top.evlist->nr_entries == 1)
-		printf("             samples  pcnt");
-	else
-		printf("   weight    samples  pcnt");
-
-	if (verbose)
-		printf("         RIP       ");
-	printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
-	printf("   %s    _______ _____",
-	       top.evlist->nr_entries == 1 ? "      " : "______");
-	if (verbose)
-		printf(" ________________");
-	printf(" %-*.*s", sym_width, sym_width, graph_line);
-	printf(" %-*.*s", dso_width, dso_width, graph_line);
-	puts("\n");
-
-	for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
-		struct symbol *sym;
-		double pcnt;
-
-		syme = rb_entry(nd, struct sym_entry, rb_node);
-		sym = sym_entry__symbol(syme);
-		if (++printed > top.print_entries ||
-		    (int)syme->snap_count < top.count_filter)
-			continue;
-
-		pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
-					 sum_ksamples));
-
-		if (top.evlist->nr_entries == 1 || !top.display_weighted)
-			printf("%20.2f ", syme->weight);
-		else
-			printf("%9.1f %10ld ", syme->weight, syme->snap_count);
-
-		percent_color_fprintf(stdout, "%4.1f%%", pcnt);
-		if (verbose)
-			printf(" %016" PRIx64, sym->start);
-		printf(" %-*.*s", sym_width, sym_width, sym->name);
-		printf(" %-*.*s\n", dso_width, dso_width,
-		       dso_width >= syme->map->dso->long_name_len ?
-					syme->map->dso->long_name :
-					syme->map->dso->short_name);
-	}
+	hists__fprintf(&top.sym_evsel->hists, NULL, false, false,
+		       winsize.ws_row - 4 - printed, win_width, stdout);
 }
 
 static void prompt_integer(int *target, const char *msg)
@@ -371,10 +348,11 @@ static void prompt_percent(int *target, const char *msg)
 		*target = tmp;
 }
 
-static void prompt_symbol(struct sym_entry **target, const char *msg)
+static void prompt_symbol(struct hist_entry **target, const char *msg)
 {
 	char *buf = malloc(0), *p;
-	struct sym_entry *syme = *target, *n, *found = NULL;
+	struct hist_entry *syme = *target, *n, *found = NULL;
+	struct rb_node *next;
 	size_t dummy = 0;
 
 	/* zero counters of active symbol */
@@ -391,17 +369,14 @@ static void prompt_symbol(struct sym_entry **target, const char *msg)
 	if (p)
 		*p = 0;
 
-	pthread_mutex_lock(&top.active_symbols_lock);
-	syme = list_entry(top.active_symbols.next, struct sym_entry, node);
-	pthread_mutex_unlock(&top.active_symbols_lock);
-
-	list_for_each_entry_safe_from(syme, n, &top.active_symbols, node) {
-		struct symbol *sym = sym_entry__symbol(syme);
-
-		if (!strcmp(buf, sym->name)) {
-			found = syme;
+	next = rb_first(&top.sym_evsel->hists.entries);
+	while (next) {
+		n = rb_entry(next, struct hist_entry, rb_node);
+		if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
+			found = n;
 			break;
 		}
+		next = rb_next(&n->rb_node);
 	}
 
 	if (!found) {
@@ -420,7 +395,7 @@ static void print_mapped_keys(void)
 	char *name = NULL;
 
 	if (top.sym_filter_entry) {
-		struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
+		struct symbol *sym = top.sym_filter_entry->ms.sym;
 		name = sym->name;
 	}
 
@@ -437,9 +412,6 @@ static void print_mapped_keys(void)
 	fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 	fprintf(stdout, "\t[S]     stop annotation.\n");
 
-	if (top.evlist->nr_entries > 1)
-		fprintf(stdout, "\t[w]     toggle display weighted/count[E]r. \t(%d)\n", top.display_weighted ? 1 : 0);
-
 	fprintf(stdout,
 		"\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 		top.hide_kernel_symbols ? "yes" : "no");
@@ -466,7 +438,6 @@ static int key_mapped(int c)
 		case 'S':
 			return 1;
 		case 'E':
-		case 'w':
 			return top.evlist->nr_entries > 1 ? 1 : 0;
 		default:
 			break;
@@ -475,7 +446,7 @@ static int key_mapped(int c)
 	return 0;
 }
 
-static void handle_keypress(struct perf_session *session, int c)
+static void handle_keypress(int c)
 {
 	if (!key_mapped(c)) {
 		struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
@@ -551,7 +522,7 @@ static void handle_keypress(struct perf_session *session, int c)
 		case 'Q':
 			printf("exiting.\n");
 			if (dump_symtab)
-				perf_session__fprintf_dsos(session, stderr);
+				perf_session__fprintf_dsos(top.session, stderr);
 			exit(0);
 		case 's':
 			prompt_symbol(&top.sym_filter_entry, "Enter details symbol");
@@ -560,7 +531,7 @@ static void handle_keypress(struct perf_session *session, int c)
 			if (!top.sym_filter_entry)
 				break;
 			else {
-				struct sym_entry *syme = top.sym_filter_entry;
+				struct hist_entry *syme = top.sym_filter_entry;
 
 				top.sym_filter_entry = NULL;
 				__zero_source_counters(syme);
@@ -569,9 +540,6 @@ static void handle_keypress(struct perf_session *session, int c)
 		case 'U':
 			top.hide_user_symbols = !top.hide_user_symbols;
 			break;
-		case 'w':
-			top.display_weighted = ~top.display_weighted;
-			break;
 		case 'z':
 			top.zero = !top.zero;
 			break;
@@ -580,19 +548,31 @@ static void handle_keypress(struct perf_session *session, int c)
 	}
 }
 
+static void perf_top__sort_new_samples(void *arg)
+{
+	struct perf_top *t = arg;
+	perf_top__reset_sample_counters(t);
+
+	if (t->evlist->selected != NULL)
+		t->sym_evsel = t->evlist->selected;
+
+	hists__collapse_resort_threaded(&t->sym_evsel->hists);
+	hists__output_resort_threaded(&t->sym_evsel->hists);
+	hists__decay_entries_threaded(&t->sym_evsel->hists,
+				      top.hide_user_symbols,
+				      top.hide_kernel_symbols);
+	hists__output_recalc_col_len(&t->sym_evsel->hists, winsize.ws_row - 3);
+}
+
 static void *display_thread_tui(void *arg __used)
 {
-	int err = 0;
-	pthread_mutex_lock(&top.active_symbols_lock);
-	while (list_empty(&top.active_symbols)) {
-		err = pthread_cond_wait(&top.active_symbols_cond,
-					&top.active_symbols_lock);
-		if (err)
-			break;
-	}
-	pthread_mutex_unlock(&top.active_symbols_lock);
-	if (!err)
-		perf_top__tui_browser(&top);
+	const char *help = "For a higher level overview, try: perf top --sort comm,dso";
+
+	perf_top__sort_new_samples(&top);
+	perf_evlist__tui_browse_hists(top.evlist, help,
+				      perf_top__sort_new_samples,
+				      &top, top.delay_secs);
+
 	exit_browser(0);
 	exit(0);
 	return NULL;
@@ -603,7 +583,6 @@ static void *display_thread(void *arg __used)
 	struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 	struct termios tc, save;
 	int delay_msecs, c;
-	struct perf_session *session = (struct perf_session *) arg;
 
 	tcgetattr(0, &save);
 	tc = save;
@@ -611,20 +590,35 @@ static void *display_thread(void *arg __used)
 	tc.c_cc[VMIN] = 0;
 	tc.c_cc[VTIME] = 0;
 
+	pthread__unblock_sigwinch();
 repeat:
 	delay_msecs = top.delay_secs * 1000;
 	tcsetattr(0, TCSANOW, &tc);
 	/* trash return*/
 	getc(stdin);
 
-	do {
-		print_sym_table(session);
-	} while (!poll(&stdin_poll, 1, delay_msecs) == 1);
-
+	while (1) {
+		print_sym_table();
+		/*
+		 * Either timeout expired or we got an EINTR due to SIGWINCH,
+		 * refresh screen in both cases.
+		 */
+		switch (poll(&stdin_poll, 1, delay_msecs)) {
+		case 0:
+			continue;
+		case -1:
+			if (errno == EINTR)
+				continue;
+			/* Fall trhu */
+		default:
+			goto process_hotkey;
+		}
+	}
+process_hotkey:
 	c = getc(stdin);
 	tcsetattr(0, TCSAFLUSH, &save);
 
-	handle_keypress(session, c);
+	handle_keypress(c);
 	goto repeat;
 
 	return NULL;
@@ -645,9 +639,8 @@ static const char *skip_symbols[] = {
 	NULL
 };
 
-static int symbol_filter(struct map *map, struct symbol *sym)
+static int symbol_filter(struct map *map __used, struct symbol *sym)
 {
-	struct sym_entry *syme;
 	const char *name = sym->name;
 	int i;
 
@@ -667,16 +660,6 @@ static int symbol_filter(struct map *map, struct symbol *sym)
 	    strstr(name, "_text_end"))
 		return 1;
 
-	syme = symbol__priv(sym);
-	syme->map = map;
-	symbol__annotate_init(map, sym);
-
-	if (!top.sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
-		/* schedule initial sym_filter_entry setup */
-		sym_filter_entry_sched = syme;
-		sym_filter = NULL;
-	}
-
 	for (i = 0; skip_symbols[i]; i++) {
 		if (!strcmp(skip_symbols[i], name)) {
 			sym->ignore = true;
@@ -691,10 +674,11 @@ static void perf_event__process_sample(const union perf_event *event,
 				       struct perf_sample *sample,
 				       struct perf_session *session)
 {
+	struct symbol *parent = NULL;
 	u64 ip = event->ip.ip;
-	struct sym_entry *syme;
 	struct addr_location al;
 	struct machine *machine;
+	int err;
 	u8 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 
 	++top.samples;
@@ -783,46 +767,41 @@ static void perf_event__process_sample(const union perf_event *event,
 				sleep(5);
 			vmlinux_warned = true;
 		}
-
-		return;
-	}
-
-	/* let's see, whether we need to install initial sym_filter_entry */
-	if (sym_filter_entry_sched) {
-		top.sym_filter_entry = sym_filter_entry_sched;
-		sym_filter_entry_sched = NULL;
-		if (parse_source(top.sym_filter_entry) < 0) {
-			struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
-
-			pr_err("Can't annotate %s", sym->name);
-			if (top.sym_filter_entry->map->dso->symtab_type == SYMTAB__KALLSYMS) {
-				pr_err(": No vmlinux file was found in the path:\n");
-				machine__fprintf_vmlinux_path(machine, stderr);
-			} else
-				pr_err(".\n");
-			exit(1);
-		}
 	}
 
-	syme = symbol__priv(al.sym);
-	if (!al.sym->ignore) {
+	if (al.sym == NULL || !al.sym->ignore) {
 		struct perf_evsel *evsel;
+		struct hist_entry *he;
 
 		evsel = perf_evlist__id2evsel(top.evlist, sample->id);
 		assert(evsel != NULL);
-		syme->count[evsel->idx]++;
-		record_precise_ip(syme, al.map, evsel->idx, ip);
-		pthread_mutex_lock(&top.active_symbols_lock);
-		if (list_empty(&syme->node) || !syme->node.next) {
-			static bool first = true;
-			__list_insert_active_sym(syme);
-			if (first) {
-				pthread_cond_broadcast(&top.active_symbols_cond);
-				first = false;
-			}
+
+		if ((sort__has_parent || symbol_conf.use_callchain) &&
+		    sample->callchain) {
+			err = perf_session__resolve_callchain(session, al.thread,
+							      sample->callchain, &parent);
+			if (err)
+				return;
 		}
-		pthread_mutex_unlock(&top.active_symbols_lock);
+
+		he = perf_session__add_hist_entry(session, &al, sample, evsel);
+		if (he == NULL) {
+			pr_err("Problem incrementing symbol period, skipping event\n");
+			return;
+		}
+
+		if (symbol_conf.use_callchain) {
+			err = callchain_append(he->callchain, &session->callchain_cursor,
+					       sample->period);
+			if (err)
+				return;
+		}
+
+		if (sort_has_symbols)
+			record_precise_ip(he, evsel->idx, ip);
 	}
+
+	return;
 }
 
 static void perf_session__mmap_read_idx(struct perf_session *self, int idx)
@@ -873,7 +852,11 @@ static void start_counters(struct perf_evlist *evlist)
 			attr->read_format |= PERF_FORMAT_ID;
 		}
 
+		if (symbol_conf.use_callchain)
+			attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
+
 		attr->mmap = 1;
+		attr->comm = 1;
 		attr->inherit = inherit;
 try_again:
 		if (perf_evsel__open(counter, top.evlist->cpus,
@@ -928,35 +911,56 @@ out_err:
 	exit(0);
 }
 
+static int setup_sample_type(void)
+{
+	if (!sort_has_symbols) {
+		if (symbol_conf.use_callchain) {
+			ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
+			return -EINVAL;
+		}
+	} else if (!dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
+		if (callchain_register_param(&callchain_param) < 0) {
+			ui__warning("Can't register callchain params.\n");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
 static int __cmd_top(void)
 {
 	pthread_t thread;
-	int ret __used;
+	int ret;
 	/*
 	 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
 	 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
 	 */
-	struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
-	if (session == NULL)
+	top.session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
+	if (top.session == NULL)
 		return -ENOMEM;
 
+	ret = setup_sample_type();
+	if (ret)
+		goto out_delete;
+
 	if (top.target_tid != -1)
 		perf_event__synthesize_thread_map(top.evlist->threads,
-						  perf_event__process, session);
+						  perf_event__process, top.session);
 	else
-		perf_event__synthesize_threads(perf_event__process, session);
+		perf_event__synthesize_threads(perf_event__process, top.session);
 
 	start_counters(top.evlist);
-	session->evlist = top.evlist;
-	perf_session__update_sample_type(session);
+	top.session->evlist = top.evlist;
+	perf_session__update_sample_type(top.session);
 
 	/* Wait for a minimal set of events before starting the snapshot */
 	poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
 
-	perf_session__mmap_read(session);
+	perf_session__mmap_read(top.session);
 
 	if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
-							     display_thread), session)) {
+							     display_thread), NULL)) {
 		printf("Could not create display thread.\n");
 		exit(-1);
 	}
@@ -974,12 +978,96 @@ static int __cmd_top(void)
 	while (1) {
 		u64 hits = top.samples;
 
-		perf_session__mmap_read(session);
+		perf_session__mmap_read(top.session);
 
 		if (hits == top.samples)
 			ret = poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
 	}
 
+out_delete:
+	perf_session__delete(top.session);
+	top.session = NULL;
+
+	return 0;
+}
+
+static int
+parse_callchain_opt(const struct option *opt __used, const char *arg,
+		    int unset)
+{
+	char *tok, *tok2;
+	char *endptr;
+
+	/*
+	 * --no-call-graph
+	 */
+	if (unset) {
+		dont_use_callchains = true;
+		return 0;
+	}
+
+	symbol_conf.use_callchain = true;
+
+	if (!arg)
+		return 0;
+
+	tok = strtok((char *)arg, ",");
+	if (!tok)
+		return -1;
+
+	/* get the output mode */
+	if (!strncmp(tok, "graph", strlen(arg)))
+		callchain_param.mode = CHAIN_GRAPH_ABS;
+
+	else if (!strncmp(tok, "flat", strlen(arg)))
+		callchain_param.mode = CHAIN_FLAT;
+
+	else if (!strncmp(tok, "fractal", strlen(arg)))
+		callchain_param.mode = CHAIN_GRAPH_REL;
+
+	else if (!strncmp(tok, "none", strlen(arg))) {
+		callchain_param.mode = CHAIN_NONE;
+		symbol_conf.use_callchain = false;
+
+		return 0;
+	}
+
+	else
+		return -1;
+
+	/* get the min percentage */
+	tok = strtok(NULL, ",");
+	if (!tok)
+		goto setup;
+
+	callchain_param.min_percent = strtod(tok, &endptr);
+	if (tok == endptr)
+		return -1;
+
+	/* get the print limit */
+	tok2 = strtok(NULL, ",");
+	if (!tok2)
+		goto setup;
+
+	if (tok2[0] != 'c') {
+		callchain_param.print_limit = strtod(tok2, &endptr);
+		tok2 = strtok(NULL, ",");
+		if (!tok2)
+			goto setup;
+	}
+
+	/* get the call chain order */
+	if (!strcmp(tok2, "caller"))
+		callchain_param.order = ORDER_CALLER;
+	else if (!strcmp(tok2, "callee"))
+		callchain_param.order = ORDER_CALLEE;
+	else
+		return -1;
+setup:
+	if (callchain_register_param(&callchain_param) < 0) {
+		fprintf(stderr, "Can't register callchain params\n");
+		return -1;
+	}
 	return 0;
 }
 
@@ -1019,7 +1107,7 @@ static const struct option options[] = {
 			    "put the counters into a counter group"),
 	OPT_BOOLEAN('i', "inherit", &inherit,
 		    "child tasks inherit counters"),
-	OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
+	OPT_STRING(0, "sym-annotate", &sym_filter, "symbol name",
 		    "symbol to annotate"),
 	OPT_BOOLEAN('z', "zero", &top.zero,
 		    "zero history across updates"),
@@ -1033,6 +1121,28 @@ static const struct option options[] = {
 	OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
 	OPT_INCR('v', "verbose", &verbose,
 		    "be more verbose (show counter open errors, etc)"),
+	OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
+		   "sort by key(s): pid, comm, dso, symbol, parent"),
+	OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
+		    "Show a column with the number of samples"),
+	OPT_CALLBACK_DEFAULT('G', "call-graph", NULL, "output_type,min_percent, call_order",
+		     "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
+		     "Default: fractal,0.5,callee", &parse_callchain_opt,
+		     callchain_default_opt),
+	OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
+		    "Show a column with the sum of periods"),
+	OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
+		   "only consider symbols in these dsos"),
+	OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
+		   "only consider symbols in these comms"),
+	OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
+		   "only consider these symbols"),
+	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
+		    "Interleave source code with assembly code (default)"),
+	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
+		    "Display raw encoding of assembly instructions (default)"),
+	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
+		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
 	OPT_END()
 };
 
@@ -1045,18 +1155,16 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
 	if (top.evlist == NULL)
 		return -ENOMEM;
 
-	page_size = sysconf(_SC_PAGE_SIZE);
+	symbol_conf.exclude_other = false;
 
 	argc = parse_options(argc, argv, options, top_usage, 0);
 	if (argc)
 		usage_with_options(top_usage, options);
 
-	/*
- 	 * XXX For now start disabled, only using TUI if explicitely asked for.
- 	 * Change that when handle_keys equivalent gets written, live annotation
- 	 * done, etc.
- 	 */
-	use_browser = 0;
+	if (sort_order == default_sort_order)
+		sort_order = "dso,symbol";
+
+	setup_sorting(top_usage, options);
 
 	if (use_stdio)
 		use_browser = 0;
@@ -1119,13 +1227,22 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
 
 	top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
 
-	symbol_conf.priv_size = (sizeof(struct sym_entry) + sizeof(struct annotation) +
-				 (top.evlist->nr_entries + 1) * sizeof(unsigned long));
+	symbol_conf.priv_size = sizeof(struct annotation);
 
 	symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
 	if (symbol__init() < 0)
 		return -1;
 
+	sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
+	sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
+	sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
+
+	/*
+	 * Avoid annotation data structures overhead when symbols aren't on the
+	 * sort list.
+	 */
+	sort_has_symbols = sort_sym.list.next != NULL;
+
 	get_term_dimensions(&winsize);
 	if (top.print_entries == 0) {
 		update_print_entries(&winsize);
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index 4702e24..b382bd5 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -4,7 +4,6 @@
 #include "util/util.h"
 #include "util/strbuf.h"
 
-extern const char perf_version_string[];
 extern const char perf_usage_string[];
 extern const char perf_more_info_string[];
 
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index ec635b7..73d0cac 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -427,6 +427,24 @@ static void get_debugfs_mntpt(void)
 		debugfs_mntpt[0] = '\0';
 }
 
+static void pthread__block_sigwinch(void)
+{
+	sigset_t set;
+
+	sigemptyset(&set);
+	sigaddset(&set, SIGWINCH);
+	pthread_sigmask(SIG_BLOCK, &set, NULL);
+}
+
+void pthread__unblock_sigwinch(void)
+{
+	sigset_t set;
+
+	sigemptyset(&set);
+	sigaddset(&set, SIGWINCH);
+	pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+}
+
 int main(int argc, const char **argv)
 {
 	const char *cmd;
@@ -480,6 +498,12 @@ int main(int argc, const char **argv)
 	 * time.
 	 */
 	setup_path();
+	/*
+	 * Block SIGWINCH notifications so that the thread that wants it can
+	 * unblock and get syscalls like select interrupted instead of waiting
+	 * forever while the signal goes to some other non interested thread.
+	 */
+	pthread__block_sigwinch();
 
 	while (1) {
 		static int done_help;
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index a5fc660..914c895 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -9,18 +9,21 @@ void get_term_dimensions(struct winsize *ws);
 #include "../../arch/x86/include/asm/unistd.h"
 #define rmb()		asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
 #define cpu_relax()	asm volatile("rep; nop" ::: "memory");
+#define CPUINFO_PROC	"model name"
 #endif
 
 #if defined(__x86_64__)
 #include "../../arch/x86/include/asm/unistd.h"
 #define rmb()		asm volatile("lfence" ::: "memory")
 #define cpu_relax()	asm volatile("rep; nop" ::: "memory");
+#define CPUINFO_PROC	"model name"
 #endif
 
 #ifdef __powerpc__
 #include "../../arch/powerpc/include/asm/unistd.h"
 #define rmb()		asm volatile ("sync" ::: "memory")
 #define cpu_relax()	asm volatile ("" ::: "memory");
+#define CPUINFO_PROC	"cpu"
 #endif
 
 #ifdef __s390__
@@ -37,30 +40,35 @@ void get_term_dimensions(struct winsize *ws);
 # define rmb()		asm volatile("" ::: "memory")
 #endif
 #define cpu_relax()	asm volatile("" ::: "memory")
+#define CPUINFO_PROC	"cpu type"
 #endif
 
 #ifdef __hppa__
 #include "../../arch/parisc/include/asm/unistd.h"
 #define rmb()		asm volatile("" ::: "memory")
 #define cpu_relax()	asm volatile("" ::: "memory");
+#define CPUINFO_PROC	"cpu"
 #endif
 
 #ifdef __sparc__
 #include "../../arch/sparc/include/asm/unistd.h"
 #define rmb()		asm volatile("":::"memory")
 #define cpu_relax()	asm volatile("":::"memory")
+#define CPUINFO_PROC	"cpu"
 #endif
 
 #ifdef __alpha__
 #include "../../arch/alpha/include/asm/unistd.h"
 #define rmb()		asm volatile("mb" ::: "memory")
 #define cpu_relax()	asm volatile("" ::: "memory")
+#define CPUINFO_PROC	"cpu model"
 #endif
 
 #ifdef __ia64__
 #include "../../arch/ia64/include/asm/unistd.h"
 #define rmb()		asm volatile ("mf" ::: "memory")
 #define cpu_relax()	asm volatile ("hint @pause" ::: "memory")
+#define CPUINFO_PROC	"model name"
 #endif
 
 #ifdef __arm__
@@ -71,6 +79,7 @@ void get_term_dimensions(struct winsize *ws);
  */
 #define rmb()		((void(*)(void))0xffff0fa0)()
 #define cpu_relax()	asm volatile("":::"memory")
+#define CPUINFO_PROC	"Processor"
 #endif
 
 #ifdef __mips__
@@ -83,6 +92,7 @@ void get_term_dimensions(struct winsize *ws);
 				: /* no input */			\
 				: "memory")
 #define cpu_relax()	asm volatile("" ::: "memory")
+#define CPUINFO_PROC	"cpu model"
 #endif
 
 #include <time.h>
@@ -171,5 +181,8 @@ struct ip_callchain {
 };
 
 extern bool perf_host, perf_guest;
+extern const char perf_version_string[];
+
+void pthread__unblock_sigwinch(void);
 
 #endif
diff --git a/tools/perf/scripts/python/bin/net_dropmonitor-record b/tools/perf/scripts/python/bin/net_dropmonitor-record
new file mode 100755
index 0000000..423fb81
--- /dev/null
+++ b/tools/perf/scripts/python/bin/net_dropmonitor-record
@@ -0,0 +1,2 @@
+#!/bin/bash
+perf record -e skb:kfree_skb $@
diff --git a/tools/perf/scripts/python/bin/net_dropmonitor-report b/tools/perf/scripts/python/bin/net_dropmonitor-report
new file mode 100755
index 0000000..8d698f5
--- /dev/null
+++ b/tools/perf/scripts/python/bin/net_dropmonitor-report
@@ -0,0 +1,4 @@
+#!/bin/bash
+# description: display a table of dropped frames
+
+perf script -s "$PERF_EXEC_PATH"/scripts/python/net_dropmonitor.py $@
diff --git a/tools/perf/scripts/python/net_dropmonitor.py b/tools/perf/scripts/python/net_dropmonitor.py
new file mode 100755
index 0000000..a4ffc95
--- /dev/null
+++ b/tools/perf/scripts/python/net_dropmonitor.py
@@ -0,0 +1,72 @@
+# Monitor the system for dropped packets and proudce a report of drop locations and counts
+
+import os
+import sys
+
+sys.path.append(os.environ['PERF_EXEC_PATH'] + \
+		'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
+
+from perf_trace_context import *
+from Core import *
+from Util import *
+
+drop_log = {}
+kallsyms = []
+
+def get_kallsyms_table():
+	global kallsyms
+	try:
+		f = open("/proc/kallsyms", "r")
+		linecount = 0
+		for line in f:
+			linecount = linecount+1
+		f.seek(0)
+	except:
+		return
+
+
+	j = 0
+	for line in f:
+		loc = int(line.split()[0], 16)
+		name = line.split()[2]
+		j = j +1
+		if ((j % 100) == 0):
+			print "\r" + str(j) + "/" + str(linecount),
+		kallsyms.append({ 'loc': loc, 'name' : name})
+
+	print "\r" + str(j) + "/" + str(linecount)
+	kallsyms.sort()
+	return
+
+def get_sym(sloc):
+	loc = int(sloc)
+	for i in kallsyms:
+		if (i['loc'] >= loc):
+			return (i['name'], i['loc']-loc)
+	return (None, 0)
+
+def print_drop_table():
+	print "%25s %25s %25s" % ("LOCATION", "OFFSET", "COUNT")
+	for i in drop_log.keys():
+		(sym, off) = get_sym(i)
+		if sym == None:
+			sym = i
+		print "%25s %25s %25s" % (sym, off, drop_log[i])
+
+
+def trace_begin():
+	print "Starting trace (Ctrl-C to dump results)"
+
+def trace_end():
+	print "Gathering kallsyms data"
+	get_kallsyms_table()
+	print_drop_table()
+
+# called from perf, when it finds a correspoinding event
+def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm,
+			skbaddr, protocol, location):
+	slocation = str(location)
+	try:
+		drop_log[slocation] = drop_log[slocation] + 1
+	except:
+		drop_log[slocation] = 1
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index e01af2b..bc8f477 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -16,6 +16,8 @@
 #include "annotate.h"
 #include <pthread.h>
 
+const char 	*disassembler_style;
+
 int symbol__annotate_init(struct map *map __used, struct symbol *sym)
 {
 	struct annotation *notes = symbol__annotation(sym);
@@ -323,10 +325,15 @@ fallback:
 		 dso, dso->long_name, sym, sym->name);
 
 	snprintf(command, sizeof(command),
-		 "objdump --start-address=0x%016" PRIx64
-		 " --stop-address=0x%016" PRIx64 " -dS -C %s|grep -v %s|expand",
+		 "objdump %s%s --start-address=0x%016" PRIx64
+		 " --stop-address=0x%016" PRIx64
+		 " -d %s %s -C %s|grep -v %s|expand",
+		 disassembler_style ? "-M " : "",
+		 disassembler_style ? disassembler_style : "",
 		 map__rip_2objdump(map, sym->start),
 		 map__rip_2objdump(map, sym->end),
+		 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
+		 symbol_conf.annotate_src ? "-S" : "",
 		 symfs_filename, filename);
 
 	pr_debug("Executing: %s\n", command);
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index c2c2868..d907252 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -91,13 +91,18 @@ int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
 #ifdef NO_NEWT_SUPPORT
 static inline int symbol__tui_annotate(struct symbol *sym __used,
 				       struct map *map __used,
-				       int evidx __used, int refresh __used)
+				       int evidx __used,
+				       void(*timer)(void *arg) __used,
+				       void *arg __used, int delay_secs __used)
 {
 	return 0;
 }
 #else
 int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
-			 int refresh);
+			 int nr_events, void(*timer)(void *arg), void *arg,
+			 int delay_secs);
 #endif
 
+extern const char	*disassembler_style;
+
 #endif	/* __PERF_ANNOTATE_H */
diff --git a/tools/perf/util/color.c b/tools/perf/util/color.c
index e191eb9..521c38a7 100644
--- a/tools/perf/util/color.c
+++ b/tools/perf/util/color.c
@@ -200,7 +200,7 @@ static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
 	 * Auto-detect:
 	 */
 	if (perf_use_color_default < 0) {
-		if (isatty(1) || pager_in_use())
+		if (isatty(fileno(fp)) || pager_in_use())
 			perf_use_color_default = 1;
 		else
 			perf_use_color_default = 0;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 72e9f48..2f6bc89 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -533,3 +533,9 @@ bool perf_evlist__sample_id_all(const struct perf_evlist *evlist)
 	first = list_entry(evlist->entries.next, struct perf_evsel, node);
 	return first->attr.sample_id_all;
 }
+
+void perf_evlist__set_selected(struct perf_evlist *evlist,
+			       struct perf_evsel *evsel)
+{
+	evlist->selected = evsel;
+}
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index f349150..6be71fc 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -25,6 +25,7 @@ struct perf_evlist {
 	struct pollfd	 *pollfd;
 	struct thread_map *threads;
 	struct cpu_map	  *cpus;
+	struct perf_evsel *selected;
 };
 
 struct perf_evsel;
@@ -56,6 +57,9 @@ void perf_evlist__munmap(struct perf_evlist *evlist);
 void perf_evlist__disable(struct perf_evlist *evlist);
 void perf_evlist__enable(struct perf_evlist *evlist);
 
+void perf_evlist__set_selected(struct perf_evlist *evlist,
+			       struct perf_evsel *evsel);
+
 static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
 					 struct cpu_map *cpus,
 					 struct thread_map *threads)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index e389815..b46f6e4 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -39,6 +39,7 @@ void perf_evsel__init(struct perf_evsel *evsel,
 	evsel->idx	   = idx;
 	evsel->attr	   = *attr;
 	INIT_LIST_HEAD(&evsel->node);
+	hists__init(&evsel->hists);
 }
 
 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index b6c1ad1..76c0b2c 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -7,6 +7,7 @@
 #include <stdlib.h>
 #include <linux/list.h>
 #include <linux/kernel.h>
+#include <sys/utsname.h>
 
 #include "evlist.h"
 #include "evsel.h"
@@ -17,12 +18,19 @@
 #include "session.h"
 #include "symbol.h"
 #include "debug.h"
+#include "cpumap.h"
 
 static bool no_buildid_cache = false;
 
 static int event_count;
 static struct perf_trace_event_type *events;
 
+static u32 header_argc;
+static const char **header_argv;
+
+static int dsos__write_buildid_table(struct perf_header *header, int fd);
+static int perf_session__cache_build_ids(struct perf_session *session);
+
 int perf_header__push_event(u64 id, const char *name)
 {
 	if (strlen(name) > MAX_EVENT_NAME)
@@ -110,6 +118,1020 @@ static int write_padded(int fd, const void *bf, size_t count,
 	return err;
 }
 
+static int do_write_string(int fd, const char *str)
+{
+	u32 len, olen;
+	int ret;
+
+	olen = strlen(str) + 1;
+	len = ALIGN(olen, NAME_ALIGN);
+
+	/* write len, incl. \0 */
+	ret = do_write(fd, &len, sizeof(len));
+	if (ret < 0)
+		return ret;
+
+	return write_padded(fd, str, olen, len);
+}
+
+static char *do_read_string(int fd, struct perf_header *ph)
+{
+	ssize_t sz, ret;
+	u32 len;
+	char *buf;
+
+	sz = read(fd, &len, sizeof(len));
+	if (sz < (ssize_t)sizeof(len))
+		return NULL;
+
+	if (ph->needs_swap)
+		len = bswap_32(len);
+
+	buf = malloc(len);
+	if (!buf)
+		return NULL;
+
+	ret = read(fd, buf, len);
+	if (ret == (ssize_t)len) {
+		/*
+		 * strings are padded by zeroes
+		 * thus the actual strlen of buf
+		 * may be less than len
+		 */
+		return buf;
+	}
+
+	free(buf);
+	return NULL;
+}
+
+int
+perf_header__set_cmdline(int argc, const char **argv)
+{
+	int i;
+
+	header_argc = (u32)argc;
+
+	/* do not include NULL termination */
+	header_argv = calloc(argc, sizeof(char *));
+	if (!header_argv)
+		return -ENOMEM;
+
+	/*
+	 * must copy argv contents because it gets moved
+	 * around during option parsing
+	 */
+	for (i = 0; i < argc ; i++)
+		header_argv[i] = argv[i];
+
+	return 0;
+}
+
+static int write_trace_info(int fd, struct perf_header *h __used,
+			    struct perf_evlist *evlist)
+{
+	return read_tracing_data(fd, &evlist->entries);
+}
+
+
+static int write_build_id(int fd, struct perf_header *h,
+			  struct perf_evlist *evlist __used)
+{
+	struct perf_session *session;
+	int err;
+
+	session = container_of(h, struct perf_session, header);
+
+	err = dsos__write_buildid_table(h, fd);
+	if (err < 0) {
+		pr_debug("failed to write buildid table\n");
+		return err;
+	}
+	if (!no_buildid_cache)
+		perf_session__cache_build_ids(session);
+
+	return 0;
+}
+
+static int write_hostname(int fd, struct perf_header *h __used,
+			  struct perf_evlist *evlist __used)
+{
+	struct utsname uts;
+	int ret;
+
+	ret = uname(&uts);
+	if (ret < 0)
+		return -1;
+
+	return do_write_string(fd, uts.nodename);
+}
+
+static int write_osrelease(int fd, struct perf_header *h __used,
+			   struct perf_evlist *evlist __used)
+{
+	struct utsname uts;
+	int ret;
+
+	ret = uname(&uts);
+	if (ret < 0)
+		return -1;
+
+	return do_write_string(fd, uts.release);
+}
+
+static int write_arch(int fd, struct perf_header *h __used,
+		      struct perf_evlist *evlist __used)
+{
+	struct utsname uts;
+	int ret;
+
+	ret = uname(&uts);
+	if (ret < 0)
+		return -1;
+
+	return do_write_string(fd, uts.machine);
+}
+
+static int write_version(int fd, struct perf_header *h __used,
+			 struct perf_evlist *evlist __used)
+{
+	return do_write_string(fd, perf_version_string);
+}
+
+static int write_cpudesc(int fd, struct perf_header *h __used,
+		       struct perf_evlist *evlist __used)
+{
+#ifndef CPUINFO_PROC
+#define CPUINFO_PROC NULL
+#endif
+	FILE *file;
+	char *buf = NULL;
+	char *s, *p;
+	const char *search = CPUINFO_PROC;
+	size_t len = 0;
+	int ret = -1;
+
+	if (!search)
+		return -1;
+
+	file = fopen("/proc/cpuinfo", "r");
+	if (!file)
+		return -1;
+
+	while (getline(&buf, &len, file) > 0) {
+		ret = strncmp(buf, search, strlen(search));
+		if (!ret)
+			break;
+	}
+
+	if (ret)
+		goto done;
+
+	s = buf;
+
+	p = strchr(buf, ':');
+	if (p && *(p+1) == ' ' && *(p+2))
+		s = p + 2;
+	p = strchr(s, '\n');
+	if (p)
+		*p = '\0';
+
+	/* squash extra space characters (branding string) */
+	p = s;
+	while (*p) {
+		if (isspace(*p)) {
+			char *r = p + 1;
+			char *q = r;
+			*p = ' ';
+			while (*q && isspace(*q))
+				q++;
+			if (q != (p+1))
+				while ((*r++ = *q++));
+		}
+		p++;
+	}
+	ret = do_write_string(fd, s);
+done:
+	free(buf);
+	fclose(file);
+	return ret;
+}
+
+static int write_nrcpus(int fd, struct perf_header *h __used,
+			struct perf_evlist *evlist __used)
+{
+	long nr;
+	u32 nrc, nra;
+	int ret;
+
+	nr = sysconf(_SC_NPROCESSORS_CONF);
+	if (nr < 0)
+		return -1;
+
+	nrc = (u32)(nr & UINT_MAX);
+
+	nr = sysconf(_SC_NPROCESSORS_ONLN);
+	if (nr < 0)
+		return -1;
+
+	nra = (u32)(nr & UINT_MAX);
+
+	ret = do_write(fd, &nrc, sizeof(nrc));
+	if (ret < 0)
+		return ret;
+
+	return do_write(fd, &nra, sizeof(nra));
+}
+
+static int write_event_desc(int fd, struct perf_header *h __used,
+			    struct perf_evlist *evlist)
+{
+	struct perf_evsel *attr;
+	u32 nre = 0, nri, sz;
+	int ret;
+
+	list_for_each_entry(attr, &evlist->entries, node)
+		nre++;
+
+	/*
+	 * write number of events
+	 */
+	ret = do_write(fd, &nre, sizeof(nre));
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * size of perf_event_attr struct
+	 */
+	sz = (u32)sizeof(attr->attr);
+	ret = do_write(fd, &sz, sizeof(sz));
+	if (ret < 0)
+		return ret;
+
+	list_for_each_entry(attr, &evlist->entries, node) {
+
+		ret = do_write(fd, &attr->attr, sz);
+		if (ret < 0)
+			return ret;
+		/*
+		 * write number of unique id per event
+		 * there is one id per instance of an event
+		 *
+		 * copy into an nri to be independent of the
+		 * type of ids,
+		 */
+		nri = attr->ids;
+		ret = do_write(fd, &nri, sizeof(nri));
+		if (ret < 0)
+			return ret;
+
+		/*
+		 * write event string as passed on cmdline
+		 */
+		ret = do_write_string(fd, attr->name);
+		if (ret < 0)
+			return ret;
+		/*
+		 * write unique ids for this event
+		 */
+		ret = do_write(fd, attr->id, attr->ids * sizeof(u64));
+		if (ret < 0)
+			return ret;
+	}
+	return 0;
+}
+
+static int write_cmdline(int fd, struct perf_header *h __used,
+			 struct perf_evlist *evlist __used)
+{
+	char buf[MAXPATHLEN];
+	char proc[32];
+	u32 i, n;
+	int ret;
+
+	/*
+	 * actual atual path to perf binary
+	 */
+	sprintf(proc, "/proc/%d/exe", getpid());
+	ret = readlink(proc, buf, sizeof(buf));
+	if (ret <= 0)
+		return -1;
+
+	/* readlink() does not add null termination */
+	buf[ret] = '\0';
+
+	/* account for binary path */
+	n = header_argc + 1;
+
+	ret = do_write(fd, &n, sizeof(n));
+	if (ret < 0)
+		return ret;
+
+	ret = do_write_string(fd, buf);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0 ; i < header_argc; i++) {
+		ret = do_write_string(fd, header_argv[i]);
+		if (ret < 0)
+			return ret;
+	}
+	return 0;
+}
+
+#define CORE_SIB_FMT \
+	"/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
+#define THRD_SIB_FMT \
+	"/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
+
+struct cpu_topo {
+	u32 core_sib;
+	u32 thread_sib;
+	char **core_siblings;
+	char **thread_siblings;
+};
+
+static int build_cpu_topo(struct cpu_topo *tp, int cpu)
+{
+	FILE *fp;
+	char filename[MAXPATHLEN];
+	char *buf = NULL, *p;
+	size_t len = 0;
+	u32 i = 0;
+	int ret = -1;
+
+	sprintf(filename, CORE_SIB_FMT, cpu);
+	fp = fopen(filename, "r");
+	if (!fp)
+		return -1;
+
+	if (getline(&buf, &len, fp) <= 0)
+		goto done;
+
+	fclose(fp);
+
+	p = strchr(buf, '\n');
+	if (p)
+		*p = '\0';
+
+	for (i = 0; i < tp->core_sib; i++) {
+		if (!strcmp(buf, tp->core_siblings[i]))
+			break;
+	}
+	if (i == tp->core_sib) {
+		tp->core_siblings[i] = buf;
+		tp->core_sib++;
+		buf = NULL;
+		len = 0;
+	}
+
+	sprintf(filename, THRD_SIB_FMT, cpu);
+	fp = fopen(filename, "r");
+	if (!fp)
+		goto done;
+
+	if (getline(&buf, &len, fp) <= 0)
+		goto done;
+
+	p = strchr(buf, '\n');
+	if (p)
+		*p = '\0';
+
+	for (i = 0; i < tp->thread_sib; i++) {
+		if (!strcmp(buf, tp->thread_siblings[i]))
+			break;
+	}
+	if (i == tp->thread_sib) {
+		tp->thread_siblings[i] = buf;
+		tp->thread_sib++;
+		buf = NULL;
+	}
+	ret = 0;
+done:
+	if(fp)
+		fclose(fp);
+	free(buf);
+	return ret;
+}
+
+static void free_cpu_topo(struct cpu_topo *tp)
+{
+	u32 i;
+
+	if (!tp)
+		return;
+
+	for (i = 0 ; i < tp->core_sib; i++)
+		free(tp->core_siblings[i]);
+
+	for (i = 0 ; i < tp->thread_sib; i++)
+		free(tp->thread_siblings[i]);
+
+	free(tp);
+}
+
+static struct cpu_topo *build_cpu_topology(void)
+{
+	struct cpu_topo *tp;
+	void *addr;
+	u32 nr, i;
+	size_t sz;
+	long ncpus;
+	int ret = -1;
+
+	ncpus = sysconf(_SC_NPROCESSORS_CONF);
+	if (ncpus < 0)
+		return NULL;
+
+	nr = (u32)(ncpus & UINT_MAX);
+
+	sz = nr * sizeof(char *);
+
+	addr = calloc(1, sizeof(*tp) + 2 * sz);
+	if (!addr)
+		return NULL;
+
+	tp = addr;
+
+	addr += sizeof(*tp);
+	tp->core_siblings = addr;
+	addr += sz;
+	tp->thread_siblings = addr;
+
+	for (i = 0; i < nr; i++) {
+		ret = build_cpu_topo(tp, i);
+		if (ret < 0)
+			break;
+	}
+	if (ret) {
+		free_cpu_topo(tp);
+		tp = NULL;
+	}
+	return tp;
+}
+
+static int write_cpu_topology(int fd, struct perf_header *h __used,
+			  struct perf_evlist *evlist __used)
+{
+	struct cpu_topo *tp;
+	u32 i;
+	int ret;
+
+	tp = build_cpu_topology();
+	if (!tp)
+		return -1;
+
+	ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
+	if (ret < 0)
+		goto done;
+
+	for (i = 0; i < tp->core_sib; i++) {
+		ret = do_write_string(fd, tp->core_siblings[i]);
+		if (ret < 0)
+			goto done;
+	}
+	ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
+	if (ret < 0)
+		goto done;
+
+	for (i = 0; i < tp->thread_sib; i++) {
+		ret = do_write_string(fd, tp->thread_siblings[i]);
+		if (ret < 0)
+			break;
+	}
+done:
+	free_cpu_topo(tp);
+	return ret;
+}
+
+
+
+static int write_total_mem(int fd, struct perf_header *h __used,
+			  struct perf_evlist *evlist __used)
+{
+	char *buf = NULL;
+	FILE *fp;
+	size_t len = 0;
+	int ret = -1, n;
+	uint64_t mem;
+
+	fp = fopen("/proc/meminfo", "r");
+	if (!fp)
+		return -1;
+
+	while (getline(&buf, &len, fp) > 0) {
+		ret = strncmp(buf, "MemTotal:", 9);
+		if (!ret)
+			break;
+	}
+	if (!ret) {
+		n = sscanf(buf, "%*s %"PRIu64, &mem);
+		if (n == 1)
+			ret = do_write(fd, &mem, sizeof(mem));
+	}
+	free(buf);
+	fclose(fp);
+	return ret;
+}
+
+static int write_topo_node(int fd, int node)
+{
+	char str[MAXPATHLEN];
+	char field[32];
+	char *buf = NULL, *p;
+	size_t len = 0;
+	FILE *fp;
+	u64 mem_total, mem_free, mem;
+	int ret = -1;
+
+	sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
+	fp = fopen(str, "r");
+	if (!fp)
+		return -1;
+
+	while (getline(&buf, &len, fp) > 0) {
+		/* skip over invalid lines */
+		if (!strchr(buf, ':'))
+			continue;
+		if (sscanf(buf, "%*s %*d %s %"PRIu64, field, &mem) != 2)
+			goto done;
+		if (!strcmp(field, "MemTotal:"))
+			mem_total = mem;
+		if (!strcmp(field, "MemFree:"))
+			mem_free = mem;
+	}
+
+	fclose(fp);
+
+	ret = do_write(fd, &mem_total, sizeof(u64));
+	if (ret)
+		goto done;
+
+	ret = do_write(fd, &mem_free, sizeof(u64));
+	if (ret)
+		goto done;
+
+	ret = -1;
+	sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
+
+	fp = fopen(str, "r");
+	if (!fp)
+		goto done;
+
+	if (getline(&buf, &len, fp) <= 0)
+		goto done;
+
+	p = strchr(buf, '\n');
+	if (p)
+		*p = '\0';
+
+	ret = do_write_string(fd, buf);
+done:
+	free(buf);
+	fclose(fp);
+	return ret;
+}
+
+static int write_numa_topology(int fd, struct perf_header *h __used,
+			  struct perf_evlist *evlist __used)
+{
+	char *buf = NULL;
+	size_t len = 0;
+	FILE *fp;
+	struct cpu_map *node_map = NULL;
+	char *c;
+	u32 nr, i, j;
+	int ret = -1;
+
+	fp = fopen("/sys/devices/system/node/online", "r");
+	if (!fp)
+		return -1;
+
+	if (getline(&buf, &len, fp) <= 0)
+		goto done;
+
+	c = strchr(buf, '\n');
+	if (c)
+		*c = '\0';
+
+	node_map = cpu_map__new(buf);
+	if (!node_map)
+		goto done;
+
+	nr = (u32)node_map->nr;
+
+	ret = do_write(fd, &nr, sizeof(nr));
+	if (ret < 0)
+		goto done;
+
+	for (i = 0; i < nr; i++) {
+		j = (u32)node_map->map[i];
+		ret = do_write(fd, &j, sizeof(j));
+		if (ret < 0)
+			break;
+
+		ret = write_topo_node(fd, i);
+		if (ret < 0)
+			break;
+	}
+done:
+	free(buf);
+	fclose(fp);
+	free(node_map);
+	return ret;
+}
+
+/*
+ * default get_cpuid(): nothing gets recorded
+ * actual implementation must be in arch/$(ARCH)/util/header.c
+ */
+int __attribute__((weak)) get_cpuid(char *buffer __used, size_t sz __used)
+{
+	return -1;
+}
+
+static int write_cpuid(int fd, struct perf_header *h __used,
+		       struct perf_evlist *evlist __used)
+{
+	char buffer[64];
+	int ret;
+
+	ret = get_cpuid(buffer, sizeof(buffer));
+	if (!ret)
+		goto write_it;
+
+	return -1;
+write_it:
+	return do_write_string(fd, buffer);
+}
+
+static void print_hostname(struct perf_header *ph, int fd, FILE *fp)
+{
+	char *str = do_read_string(fd, ph);
+	fprintf(fp, "# hostname : %s\n", str);
+	free(str);
+}
+
+static void print_osrelease(struct perf_header *ph, int fd, FILE *fp)
+{
+	char *str = do_read_string(fd, ph);
+	fprintf(fp, "# os release : %s\n", str);
+	free(str);
+}
+
+static void print_arch(struct perf_header *ph, int fd, FILE *fp)
+{
+	char *str = do_read_string(fd, ph);
+	fprintf(fp, "# arch : %s\n", str);
+	free(str);
+}
+
+static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp)
+{
+	char *str = do_read_string(fd, ph);
+	fprintf(fp, "# cpudesc : %s\n", str);
+	free(str);
+}
+
+static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp)
+{
+	ssize_t ret;
+	u32 nr;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != (ssize_t)sizeof(nr))
+		nr = -1; /* interpreted as error */
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	fprintf(fp, "# nrcpus online : %u\n", nr);
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != (ssize_t)sizeof(nr))
+		nr = -1; /* interpreted as error */
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	fprintf(fp, "# nrcpus avail : %u\n", nr);
+}
+
+static void print_version(struct perf_header *ph, int fd, FILE *fp)
+{
+	char *str = do_read_string(fd, ph);
+	fprintf(fp, "# perf version : %s\n", str);
+	free(str);
+}
+
+static void print_cmdline(struct perf_header *ph, int fd, FILE *fp)
+{
+	ssize_t ret;
+	char *str;
+	u32 nr, i;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != (ssize_t)sizeof(nr))
+		return;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	fprintf(fp, "# cmdline : ");
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		fprintf(fp, "%s ", str);
+		free(str);
+	}
+	fputc('\n', fp);
+}
+
+static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp)
+{
+	ssize_t ret;
+	u32 nr, i;
+	char *str;
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != (ssize_t)sizeof(nr))
+		return;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		fprintf(fp, "# sibling cores   : %s\n", str);
+		free(str);
+	}
+
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != (ssize_t)sizeof(nr))
+		return;
+
+	if (ph->needs_swap)
+		nr = bswap_32(nr);
+
+	for (i = 0; i < nr; i++) {
+		str = do_read_string(fd, ph);
+		fprintf(fp, "# sibling threads : %s\n", str);
+		free(str);
+	}
+}
+
+static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
+{
+	struct perf_event_attr attr;
+	uint64_t id;
+	void *buf = NULL;
+	char *str;
+	u32 nre, sz, nr, i, j, msz;
+	int ret;
+
+	/* number of events */
+	ret = read(fd, &nre, sizeof(nre));
+	if (ret != (ssize_t)sizeof(nre))
+		goto error;
+
+	if (ph->needs_swap)
+		nre = bswap_32(nre);
+
+	ret = read(fd, &sz, sizeof(sz));
+	if (ret != (ssize_t)sizeof(sz))
+		goto error;
+
+	if (ph->needs_swap)
+		sz = bswap_32(sz);
+
+	/*
+	 * ensure it is at least to our ABI rev
+	 */
+	if (sz < (u32)sizeof(attr))
+		goto error;
+
+	memset(&attr, 0, sizeof(attr));
+
+	/* read entire region to sync up to next field */
+	buf = malloc(sz);
+	if (!buf)
+		goto error;
+
+	msz = sizeof(attr);
+	if (sz < msz)
+		msz = sz;
+
+	for (i = 0 ; i < nre; i++) {
+
+		ret = read(fd, buf, sz);
+		if (ret != (ssize_t)sz)
+			goto error;
+
+		if (ph->needs_swap)
+			perf_event__attr_swap(buf);
+
+		memcpy(&attr, buf, msz);
+
+		ret = read(fd, &nr, sizeof(nr));
+		if (ret != (ssize_t)sizeof(nr))
+			goto error;
+
+		if (ph->needs_swap)
+			nr = bswap_32(nr);
+
+		str = do_read_string(fd, ph);
+		fprintf(fp, "# event : name = %s, ", str);
+		free(str);
+
+		fprintf(fp, "type = %d, config = 0x%"PRIx64
+			    ", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64,
+				attr.type,
+				(u64)attr.config,
+				(u64)attr.config1,
+				(u64)attr.config2);
+
+		fprintf(fp, ", excl_usr = %d, excl_kern = %d",
+				attr.exclude_user,
+				attr.exclude_kernel);
+
+		if (nr)
+			fprintf(fp, ", id = {");
+
+		for (j = 0 ; j < nr; j++) {
+			ret = read(fd, &id, sizeof(id));
+			if (ret != (ssize_t)sizeof(id))
+				goto error;
+
+			if (ph->needs_swap)
+				id = bswap_64(id);
+
+			if (j)
+				fputc(',', fp);
+
+			fprintf(fp, " %"PRIu64, id);
+		}
+		if (nr && j == nr)
+			fprintf(fp, " }");
+		fputc('\n', fp);
+	}
+	free(buf);
+	return;
+error:
+	fprintf(fp, "# event desc: not available or unable to read\n");
+}
+
+static void print_total_mem(struct perf_header *h __used, int fd, FILE *fp)
+{
+	uint64_t mem;
+	ssize_t ret;
+
+	ret = read(fd, &mem, sizeof(mem));
+	if (ret != sizeof(mem))
+		goto error;
+
+	if (h->needs_swap)
+		mem = bswap_64(mem);
+
+	fprintf(fp, "# total memory : %"PRIu64" kB\n", mem);
+	return;
+error:
+	fprintf(fp, "# total memory : unknown\n");
+}
+
+static void print_numa_topology(struct perf_header *h __used, int fd, FILE *fp)
+{
+	ssize_t ret;
+	u32 nr, c, i;
+	char *str;
+	uint64_t mem_total, mem_free;
+
+	/* nr nodes */
+	ret = read(fd, &nr, sizeof(nr));
+	if (ret != (ssize_t)sizeof(nr))
+		goto error;
+
+	if (h->needs_swap)
+		nr = bswap_32(nr);
+
+	for (i = 0; i < nr; i++) {
+
+		/* node number */
+		ret = read(fd, &c, sizeof(c));
+		if (ret != (ssize_t)sizeof(c))
+			goto error;
+
+		if (h->needs_swap)
+			c = bswap_32(c);
+
+		ret = read(fd, &mem_total, sizeof(u64));
+		if (ret != sizeof(u64))
+			goto error;
+
+		ret = read(fd, &mem_free, sizeof(u64));
+		if (ret != sizeof(u64))
+			goto error;
+
+		if (h->needs_swap) {
+			mem_total = bswap_64(mem_total);
+			mem_free = bswap_64(mem_free);
+		}
+
+		fprintf(fp, "# node%u meminfo  : total = %"PRIu64" kB,"
+			    " free = %"PRIu64" kB\n",
+			c,
+			mem_total,
+			mem_free);
+
+		str = do_read_string(fd, h);
+		fprintf(fp, "# node%u cpu list : %s\n", c, str);
+		free(str);
+	}
+	return;
+error:
+	fprintf(fp, "# numa topology : not available\n");
+}
+
+static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
+{
+	char *str = do_read_string(fd, ph);
+	fprintf(fp, "# cpuid : %s\n", str);
+	free(str);
+}
+
+struct feature_ops {
+	int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
+	void (*print)(struct perf_header *h, int fd, FILE *fp);
+	const char *name;
+	bool full_only;
+};
+
+#define FEAT_OPA(n, w, p) \
+	[n] = { .name = #n, .write = w, .print = p }
+#define FEAT_OPF(n, w, p) \
+	[n] = { .name = #n, .write = w, .print = p, .full_only = true }
+
+static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
+	FEAT_OPA(HEADER_TRACE_INFO, write_trace_info, NULL),
+	FEAT_OPA(HEADER_BUILD_ID, write_build_id, NULL),
+	FEAT_OPA(HEADER_HOSTNAME, write_hostname, print_hostname),
+	FEAT_OPA(HEADER_OSRELEASE, write_osrelease, print_osrelease),
+	FEAT_OPA(HEADER_VERSION, write_version, print_version),
+	FEAT_OPA(HEADER_ARCH, write_arch, print_arch),
+	FEAT_OPA(HEADER_NRCPUS, write_nrcpus, print_nrcpus),
+	FEAT_OPA(HEADER_CPUDESC, write_cpudesc, print_cpudesc),
+	FEAT_OPA(HEADER_CPUID, write_cpuid, print_cpuid),
+	FEAT_OPA(HEADER_TOTAL_MEM, write_total_mem, print_total_mem),
+	FEAT_OPA(HEADER_EVENT_DESC, write_event_desc, print_event_desc),
+	FEAT_OPA(HEADER_CMDLINE, write_cmdline, print_cmdline),
+	FEAT_OPF(HEADER_CPU_TOPOLOGY, write_cpu_topology, print_cpu_topology),
+	FEAT_OPF(HEADER_NUMA_TOPOLOGY, write_numa_topology, print_numa_topology),
+};
+
+struct header_print_data {
+	FILE *fp;
+	bool full; /* extended list of headers */
+};
+
+static int perf_file_section__fprintf_info(struct perf_file_section *section,
+					   struct perf_header *ph,
+					   int feat, int fd, void *data)
+{
+	struct header_print_data *hd = data;
+
+	if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
+		pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
+				"%d, continuing...\n", section->offset, feat);
+		return 0;
+	}
+	if (feat < HEADER_TRACE_INFO || feat >= HEADER_LAST_FEATURE) {
+		pr_warning("unknown feature %d\n", feat);
+		return -1;
+	}
+	if (!feat_ops[feat].print)
+		return 0;
+
+	if (!feat_ops[feat].full_only || hd->full)
+		feat_ops[feat].print(ph, fd, hd->fp);
+	else
+		fprintf(hd->fp, "# %s info available, use -I to display\n",
+			feat_ops[feat].name);
+
+	return 0;
+}
+
+int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
+{
+	struct header_print_data hd;
+	struct perf_header *header = &session->header;
+	int fd = session->fd;
+	hd.fp = fp;
+	hd.full = full;
+
+	perf_header__process_sections(header, fd, &hd,
+				      perf_file_section__fprintf_info);
+	return 0;
+}
+
 #define dsos__for_each_with_build_id(pos, head)	\
 	list_for_each_entry(pos, head, node)	\
 		if (!pos->has_build_id)		\
@@ -267,7 +1289,7 @@ int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
 	if (access(linkname, F_OK))
 		goto out_free;
 
-	if (readlink(linkname, filename, size) < 0)
+	if (readlink(linkname, filename, size - 1) < 0)
 		goto out_free;
 
 	if (unlink(linkname))
@@ -356,15 +1378,41 @@ static bool perf_session__read_build_ids(struct perf_session *session, bool with
 	return ret;
 }
 
+static int do_write_feat(int fd, struct perf_header *h, int type,
+			 struct perf_file_section **p,
+			 struct perf_evlist *evlist)
+{
+	int err;
+	int ret = 0;
+
+	if (perf_header__has_feat(h, type)) {
+
+		(*p)->offset = lseek(fd, 0, SEEK_CUR);
+
+		err = feat_ops[type].write(fd, h, evlist);
+		if (err < 0) {
+			pr_debug("failed to write feature %d\n", type);
+
+			/* undo anything written */
+			lseek(fd, (*p)->offset, SEEK_SET);
+
+			return -1;
+		}
+		(*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
+		(*p)++;
+	}
+	return ret;
+}
+
 static int perf_header__adds_write(struct perf_header *header,
 				   struct perf_evlist *evlist, int fd)
 {
 	int nr_sections;
 	struct perf_session *session;
-	struct perf_file_section *feat_sec;
+	struct perf_file_section *feat_sec, *p;
 	int sec_size;
 	u64 sec_start;
-	int idx = 0, err;
+	int err;
 
 	session = container_of(header, struct perf_session, header);
 
@@ -376,7 +1424,7 @@ static int perf_header__adds_write(struct perf_header *header,
 	if (!nr_sections)
 		return 0;
 
-	feat_sec = calloc(sizeof(*feat_sec), nr_sections);
+	feat_sec = p = calloc(sizeof(*feat_sec), nr_sections);
 	if (feat_sec == NULL)
 		return -ENOMEM;
 
@@ -385,36 +1433,69 @@ static int perf_header__adds_write(struct perf_header *header,
 	sec_start = header->data_offset + header->data_size;
 	lseek(fd, sec_start + sec_size, SEEK_SET);
 
-	if (perf_header__has_feat(header, HEADER_TRACE_INFO)) {
-		struct perf_file_section *trace_sec;
-
-		trace_sec = &feat_sec[idx++];
+	err = do_write_feat(fd, header, HEADER_TRACE_INFO, &p, evlist);
+	if (err)
+		goto out_free;
 
-		/* Write trace info */
-		trace_sec->offset = lseek(fd, 0, SEEK_CUR);
-		read_tracing_data(fd, &evlist->entries);
-		trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
+	err = do_write_feat(fd, header, HEADER_BUILD_ID, &p, evlist);
+	if (err) {
+		perf_header__clear_feat(header, HEADER_BUILD_ID);
+		goto out_free;
 	}
 
-	if (perf_header__has_feat(header, HEADER_BUILD_ID)) {
-		struct perf_file_section *buildid_sec;
+	err = do_write_feat(fd, header, HEADER_HOSTNAME, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_HOSTNAME);
 
-		buildid_sec = &feat_sec[idx++];
+	err = do_write_feat(fd, header, HEADER_OSRELEASE, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_OSRELEASE);
 
-		/* Write build-ids */
-		buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
-		err = dsos__write_buildid_table(header, fd);
-		if (err < 0) {
-			pr_debug("failed to write buildid table\n");
-			goto out_free;
-		}
-		buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
-					  buildid_sec->offset;
-		if (!no_buildid_cache)
-			perf_session__cache_build_ids(session);
-	}
+	err = do_write_feat(fd, header, HEADER_VERSION, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_VERSION);
+
+	err = do_write_feat(fd, header, HEADER_ARCH, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_ARCH);
+
+	err = do_write_feat(fd, header, HEADER_NRCPUS, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_NRCPUS);
+
+	err = do_write_feat(fd, header, HEADER_CPUDESC, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_CPUDESC);
+
+	err = do_write_feat(fd, header, HEADER_CPUID, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_CPUID);
+
+	err = do_write_feat(fd, header, HEADER_TOTAL_MEM, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_TOTAL_MEM);
+
+	err = do_write_feat(fd, header, HEADER_CMDLINE, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_CMDLINE);
+
+	err = do_write_feat(fd, header, HEADER_EVENT_DESC, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_EVENT_DESC);
+
+	err = do_write_feat(fd, header, HEADER_CPU_TOPOLOGY, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_CPU_TOPOLOGY);
+
+	err = do_write_feat(fd, header, HEADER_NUMA_TOPOLOGY, &p, evlist);
+	if (err)
+		perf_header__clear_feat(header, HEADER_NUMA_TOPOLOGY);
 
 	lseek(fd, sec_start, SEEK_SET);
+	/*
+	 * may write more than needed due to dropped feature, but
+	 * this is okay, reader will skip the mising entries
+	 */
 	err = do_write(fd, feat_sec, sec_size);
 	if (err < 0)
 		pr_debug("failed to write feature section\n");
@@ -554,9 +1635,10 @@ static int perf_header__getbuffer64(struct perf_header *header,
 }
 
 int perf_header__process_sections(struct perf_header *header, int fd,
+				  void *data,
 				  int (*process)(struct perf_file_section *section,
-						 struct perf_header *ph,
-						 int feat, int fd))
+				  struct perf_header *ph,
+				  int feat, int fd, void *data))
 {
 	struct perf_file_section *feat_sec;
 	int nr_sections;
@@ -584,7 +1666,7 @@ int perf_header__process_sections(struct perf_header *header, int fd,
 		if (perf_header__has_feat(header, feat)) {
 			struct perf_file_section *sec = &feat_sec[idx++];
 
-			err = process(sec, header, feat, fd);
+			err = process(sec, header, feat, fd, data);
 			if (err < 0)
 				break;
 		}
@@ -621,21 +1703,41 @@ int perf_file_header__read(struct perf_file_header *header,
 			bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
 		else
 			return -1;
+	} else if (ph->needs_swap) {
+		unsigned int i;
+		/*
+		 * feature bitmap is declared as an array of unsigned longs --
+		 * not good since its size can differ between the host that
+		 * generated the data file and the host analyzing the file.
+		 *
+		 * We need to handle endianness, but we don't know the size of
+		 * the unsigned long where the file was generated. Take a best
+		 * guess at determining it: try 64-bit swap first (ie., file
+		 * created on a 64-bit host), and check if the hostname feature
+		 * bit is set (this feature bit is forced on as of fbe96f2).
+		 * If the bit is not, undo the 64-bit swap and try a 32-bit
+		 * swap. If the hostname bit is still not set (e.g., older data
+		 * file), punt and fallback to the original behavior --
+		 * clearing all feature bits and setting buildid.
+		 */
+		for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i)
+			header->adds_features[i] = bswap_64(header->adds_features[i]);
+
+		if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
+			for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i) {
+				header->adds_features[i] = bswap_64(header->adds_features[i]);
+				header->adds_features[i] = bswap_32(header->adds_features[i]);
+			}
+		}
+
+		if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
+			bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
+			set_bit(HEADER_BUILD_ID, header->adds_features);
+		}
 	}
 
 	memcpy(&ph->adds_features, &header->adds_features,
 	       sizeof(ph->adds_features));
-	/*
-	 * FIXME: hack that assumes that if we need swap the perf.data file
-	 * may be coming from an arch with a different word-size, ergo different
-	 * DEFINE_BITMAP format, investigate more later, but for now its mostly
-	 * safe to assume that we have a build-id section. Trace files probably
-	 * have several other issues in this realm anyway...
-	 */
-	if (ph->needs_swap) {
-		memset(&ph->adds_features, 0, sizeof(ph->adds_features));
-		perf_header__set_feat(ph, HEADER_BUILD_ID);
-	}
 
 	ph->event_offset = header->event_types.offset;
 	ph->event_size   = header->event_types.size;
@@ -796,7 +1898,7 @@ out:
 
 static int perf_file_section__process(struct perf_file_section *section,
 				      struct perf_header *ph,
-				      int feat, int fd)
+				      int feat, int fd, void *data __used)
 {
 	if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
 		pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
@@ -813,6 +1915,21 @@ static int perf_file_section__process(struct perf_file_section *section,
 		if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
 			pr_debug("Failed to read buildids, continuing...\n");
 		break;
+
+	case HEADER_HOSTNAME:
+	case HEADER_OSRELEASE:
+	case HEADER_VERSION:
+	case HEADER_ARCH:
+	case HEADER_NRCPUS:
+	case HEADER_CPUDESC:
+	case HEADER_CPUID:
+	case HEADER_TOTAL_MEM:
+	case HEADER_CMDLINE:
+	case HEADER_EVENT_DESC:
+	case HEADER_CPU_TOPOLOGY:
+	case HEADER_NUMA_TOPOLOGY:
+		break;
+
 	default:
 		pr_debug("unknown feature %d, continuing...\n", feat);
 	}
@@ -935,7 +2052,8 @@ int perf_session__read_header(struct perf_session *session, int fd)
 		event_count =  f_header.event_types.size / sizeof(struct perf_trace_event_type);
 	}
 
-	perf_header__process_sections(header, fd, perf_file_section__process);
+	perf_header__process_sections(header, fd, NULL,
+				      perf_file_section__process);
 
 	lseek(fd, header->data_offset, SEEK_SET);
 
@@ -1100,15 +2218,29 @@ int perf_event__synthesize_tracing_data(int fd, struct perf_evlist *evlist,
 				   struct perf_session *session __unused)
 {
 	union perf_event ev;
+	struct tracing_data *tdata;
 	ssize_t size = 0, aligned_size = 0, padding;
 	int err __used = 0;
 
+	/*
+	 * We are going to store the size of the data followed
+	 * by the data contents. Since the fd descriptor is a pipe,
+	 * we cannot seek back to store the size of the data once
+	 * we know it. Instead we:
+	 *
+	 * - write the tracing data to the temp file
+	 * - get/write the data size to pipe
+	 * - write the tracing data from the temp file
+	 *   to the pipe
+	 */
+	tdata = tracing_data_get(&evlist->entries, fd, true);
+	if (!tdata)
+		return -1;
+
 	memset(&ev, 0, sizeof(ev));
 
 	ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
-	size = read_tracing_data_size(fd, &evlist->entries);
-	if (size <= 0)
-		return size;
+	size = tdata->size;
 	aligned_size = ALIGN(size, sizeof(u64));
 	padding = aligned_size - size;
 	ev.tracing_data.header.size = sizeof(ev.tracing_data);
@@ -1116,7 +2248,12 @@ int perf_event__synthesize_tracing_data(int fd, struct perf_evlist *evlist,
 
 	process(&ev, NULL, session);
 
-	err = read_tracing_data(fd, &evlist->entries);
+	/*
+	 * The put function will copy all the tracing data
+	 * stored in temp file to the pipe.
+	 */
+	tracing_data_put(tdata);
+
 	write_padded(fd, NULL, 0, padding);
 
 	return aligned_size;
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 1886256..3d5a742 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -12,6 +12,20 @@
 enum {
 	HEADER_TRACE_INFO = 1,
 	HEADER_BUILD_ID,
+
+	HEADER_HOSTNAME,
+	HEADER_OSRELEASE,
+	HEADER_VERSION,
+	HEADER_ARCH,
+	HEADER_NRCPUS,
+	HEADER_CPUDESC,
+	HEADER_CPUID,
+	HEADER_TOTAL_MEM,
+	HEADER_CMDLINE,
+	HEADER_EVENT_DESC,
+	HEADER_CPU_TOPOLOGY,
+	HEADER_NUMA_TOPOLOGY,
+
 	HEADER_LAST_FEATURE,
 };
 
@@ -68,10 +82,15 @@ void perf_header__set_feat(struct perf_header *header, int feat);
 void perf_header__clear_feat(struct perf_header *header, int feat);
 bool perf_header__has_feat(const struct perf_header *header, int feat);
 
+int perf_header__set_cmdline(int argc, const char **argv);
+
 int perf_header__process_sections(struct perf_header *header, int fd,
+				  void *data,
 				  int (*process)(struct perf_file_section *section,
-						 struct perf_header *ph,
-						 int feat, int fd));
+				  struct perf_header *ph,
+				  int feat, int fd, void *data));
+
+int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
 
 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
 			  const char *name, bool is_kallsyms);
@@ -104,4 +123,10 @@ int perf_event__synthesize_build_id(struct dso *pos, u16 misc,
 				    struct perf_session *session);
 int perf_event__process_build_id(union perf_event *event,
 				 struct perf_session *session);
+
+/*
+ * arch specific callback
+ */
+int get_cpuid(char *buffer, size_t sz);
+
 #endif /* __PERF_HEADER_H */
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 677e1da..f6a9939 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -6,6 +6,11 @@
 #include "sort.h"
 #include <math.h>
 
+static bool hists__filter_entry_by_dso(struct hists *hists,
+				       struct hist_entry *he);
+static bool hists__filter_entry_by_thread(struct hists *hists,
+					  struct hist_entry *he);
+
 enum hist_filter {
 	HIST_FILTER__DSO,
 	HIST_FILTER__THREAD,
@@ -18,56 +23,56 @@ struct callchain_param	callchain_param = {
 	.order  = ORDER_CALLEE
 };
 
-u16 hists__col_len(struct hists *self, enum hist_column col)
+u16 hists__col_len(struct hists *hists, enum hist_column col)
 {
-	return self->col_len[col];
+	return hists->col_len[col];
 }
 
-void hists__set_col_len(struct hists *self, enum hist_column col, u16 len)
+void hists__set_col_len(struct hists *hists, enum hist_column col, u16 len)
 {
-	self->col_len[col] = len;
+	hists->col_len[col] = len;
 }
 
-bool hists__new_col_len(struct hists *self, enum hist_column col, u16 len)
+bool hists__new_col_len(struct hists *hists, enum hist_column col, u16 len)
 {
-	if (len > hists__col_len(self, col)) {
-		hists__set_col_len(self, col, len);
+	if (len > hists__col_len(hists, col)) {
+		hists__set_col_len(hists, col, len);
 		return true;
 	}
 	return false;
 }
 
-static void hists__reset_col_len(struct hists *self)
+static void hists__reset_col_len(struct hists *hists)
 {
 	enum hist_column col;
 
 	for (col = 0; col < HISTC_NR_COLS; ++col)
-		hists__set_col_len(self, col, 0);
+		hists__set_col_len(hists, col, 0);
 }
 
-static void hists__calc_col_len(struct hists *self, struct hist_entry *h)
+static void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
 {
 	u16 len;
 
 	if (h->ms.sym)
-		hists__new_col_len(self, HISTC_SYMBOL, h->ms.sym->namelen);
+		hists__new_col_len(hists, HISTC_SYMBOL, h->ms.sym->namelen);
 	else {
 		const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
 
-		if (hists__col_len(self, HISTC_DSO) < unresolved_col_width &&
+		if (hists__col_len(hists, HISTC_DSO) < unresolved_col_width &&
 		    !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 		    !symbol_conf.dso_list)
-			hists__set_col_len(self, HISTC_DSO,
+			hists__set_col_len(hists, HISTC_DSO,
 					   unresolved_col_width);
 	}
 
 	len = thread__comm_len(h->thread);
-	if (hists__new_col_len(self, HISTC_COMM, len))
-		hists__set_col_len(self, HISTC_THREAD, len + 6);
+	if (hists__new_col_len(hists, HISTC_COMM, len))
+		hists__set_col_len(hists, HISTC_THREAD, len + 6);
 
 	if (h->ms.map) {
 		len = dso__name_len(h->ms.map->dso);
-		hists__new_col_len(self, HISTC_DSO, len);
+		hists__new_col_len(hists, HISTC_DSO, len);
 	}
 }
 
@@ -92,6 +97,67 @@ static void hist_entry__add_cpumode_period(struct hist_entry *self,
 	}
 }
 
+static void hist_entry__decay(struct hist_entry *he)
+{
+	he->period = (he->period * 7) / 8;
+	he->nr_events = (he->nr_events * 7) / 8;
+}
+
+static bool hists__decay_entry(struct hists *hists, struct hist_entry *he)
+{
+	u64 prev_period = he->period;
+
+	if (prev_period == 0)
+		return true;
+
+	hist_entry__decay(he);
+
+	if (!he->filtered)
+		hists->stats.total_period -= prev_period - he->period;
+
+	return he->period == 0;
+}
+
+static void __hists__decay_entries(struct hists *hists, bool zap_user,
+				   bool zap_kernel, bool threaded)
+{
+	struct rb_node *next = rb_first(&hists->entries);
+	struct hist_entry *n;
+
+	while (next) {
+		n = rb_entry(next, struct hist_entry, rb_node);
+		next = rb_next(&n->rb_node);
+		/*
+		 * We may be annotating this, for instance, so keep it here in
+		 * case some it gets new samples, we'll eventually free it when
+		 * the user stops browsing and it agains gets fully decayed.
+		 */
+		if (((zap_user && n->level == '.') ||
+		     (zap_kernel && n->level != '.') ||
+		     hists__decay_entry(hists, n)) &&
+		    !n->used) {
+			rb_erase(&n->rb_node, &hists->entries);
+
+			if (sort__need_collapse || threaded)
+				rb_erase(&n->rb_node_in, &hists->entries_collapsed);
+
+			hist_entry__free(n);
+			--hists->nr_entries;
+		}
+	}
+}
+
+void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel)
+{
+	return __hists__decay_entries(hists, zap_user, zap_kernel, false);
+}
+
+void hists__decay_entries_threaded(struct hists *hists,
+				   bool zap_user, bool zap_kernel)
+{
+	return __hists__decay_entries(hists, zap_user, zap_kernel, true);
+}
+
 /*
  * histogram, sorted on item, collects periods
  */
@@ -113,11 +179,12 @@ static struct hist_entry *hist_entry__new(struct hist_entry *template)
 	return self;
 }
 
-static void hists__inc_nr_entries(struct hists *self, struct hist_entry *h)
+static void hists__inc_nr_entries(struct hists *hists, struct hist_entry *h)
 {
 	if (!h->filtered) {
-		hists__calc_col_len(self, h);
-		++self->nr_entries;
+		hists__calc_col_len(hists, h);
+		++hists->nr_entries;
+		hists->stats.total_period += h->period;
 	}
 }
 
@@ -128,11 +195,11 @@ static u8 symbol__parent_filter(const struct symbol *parent)
 	return 0;
 }
 
-struct hist_entry *__hists__add_entry(struct hists *self,
+struct hist_entry *__hists__add_entry(struct hists *hists,
 				      struct addr_location *al,
 				      struct symbol *sym_parent, u64 period)
 {
-	struct rb_node **p = &self->entries.rb_node;
+	struct rb_node **p;
 	struct rb_node *parent = NULL;
 	struct hist_entry *he;
 	struct hist_entry entry = {
@@ -150,9 +217,13 @@ struct hist_entry *__hists__add_entry(struct hists *self,
 	};
 	int cmp;
 
+	pthread_mutex_lock(&hists->lock);
+
+	p = &hists->entries_in->rb_node;
+
 	while (*p != NULL) {
 		parent = *p;
-		he = rb_entry(parent, struct hist_entry, rb_node);
+		he = rb_entry(parent, struct hist_entry, rb_node_in);
 
 		cmp = hist_entry__cmp(&entry, he);
 
@@ -170,12 +241,14 @@ struct hist_entry *__hists__add_entry(struct hists *self,
 
 	he = hist_entry__new(&entry);
 	if (!he)
-		return NULL;
-	rb_link_node(&he->rb_node, parent, p);
-	rb_insert_color(&he->rb_node, &self->entries);
-	hists__inc_nr_entries(self, he);
+		goto out_unlock;
+
+	rb_link_node(&he->rb_node_in, parent, p);
+	rb_insert_color(&he->rb_node_in, hists->entries_in);
 out:
 	hist_entry__add_cpumode_period(he, al->cpumode, period);
+out_unlock:
+	pthread_mutex_unlock(&hists->lock);
 	return he;
 }
 
@@ -222,7 +295,7 @@ void hist_entry__free(struct hist_entry *he)
  * collapse the histogram
  */
 
-static bool hists__collapse_insert_entry(struct hists *self,
+static bool hists__collapse_insert_entry(struct hists *hists,
 					 struct rb_root *root,
 					 struct hist_entry *he)
 {
@@ -233,15 +306,16 @@ static bool hists__collapse_insert_entry(struct hists *self,
 
 	while (*p != NULL) {
 		parent = *p;
-		iter = rb_entry(parent, struct hist_entry, rb_node);
+		iter = rb_entry(parent, struct hist_entry, rb_node_in);
 
 		cmp = hist_entry__collapse(iter, he);
 
 		if (!cmp) {
 			iter->period += he->period;
+			iter->nr_events += he->nr_events;
 			if (symbol_conf.use_callchain) {
-				callchain_cursor_reset(&self->callchain_cursor);
-				callchain_merge(&self->callchain_cursor, iter->callchain,
+				callchain_cursor_reset(&hists->callchain_cursor);
+				callchain_merge(&hists->callchain_cursor, iter->callchain,
 						he->callchain);
 			}
 			hist_entry__free(he);
@@ -254,35 +328,70 @@ static bool hists__collapse_insert_entry(struct hists *self,
 			p = &(*p)->rb_right;
 	}
 
-	rb_link_node(&he->rb_node, parent, p);
-	rb_insert_color(&he->rb_node, root);
+	rb_link_node(&he->rb_node_in, parent, p);
+	rb_insert_color(&he->rb_node_in, root);
 	return true;
 }
 
-void hists__collapse_resort(struct hists *self)
+static struct rb_root *hists__get_rotate_entries_in(struct hists *hists)
+{
+	struct rb_root *root;
+
+	pthread_mutex_lock(&hists->lock);
+
+	root = hists->entries_in;
+	if (++hists->entries_in > &hists->entries_in_array[1])
+		hists->entries_in = &hists->entries_in_array[0];
+
+	pthread_mutex_unlock(&hists->lock);
+
+	return root;
+}
+
+static void hists__apply_filters(struct hists *hists, struct hist_entry *he)
+{
+	hists__filter_entry_by_dso(hists, he);
+	hists__filter_entry_by_thread(hists, he);
+}
+
+static void __hists__collapse_resort(struct hists *hists, bool threaded)
 {
-	struct rb_root tmp;
+	struct rb_root *root;
 	struct rb_node *next;
 	struct hist_entry *n;
 
-	if (!sort__need_collapse)
+	if (!sort__need_collapse && !threaded)
 		return;
 
-	tmp = RB_ROOT;
-	next = rb_first(&self->entries);
-	self->nr_entries = 0;
-	hists__reset_col_len(self);
+	root = hists__get_rotate_entries_in(hists);
+	next = rb_first(root);
+	hists->stats.total_period = 0;
 
 	while (next) {
-		n = rb_entry(next, struct hist_entry, rb_node);
-		next = rb_next(&n->rb_node);
-
-		rb_erase(&n->rb_node, &self->entries);
-		if (hists__collapse_insert_entry(self, &tmp, n))
-			hists__inc_nr_entries(self, n);
+		n = rb_entry(next, struct hist_entry, rb_node_in);
+		next = rb_next(&n->rb_node_in);
+
+		rb_erase(&n->rb_node_in, root);
+		if (hists__collapse_insert_entry(hists, &hists->entries_collapsed, n)) {
+			/*
+			 * If it wasn't combined with one of the entries already
+			 * collapsed, we need to apply the filters that may have
+			 * been set by, say, the hist_browser.
+			 */
+			hists__apply_filters(hists, n);
+			hists__inc_nr_entries(hists, n);
+		}
 	}
+}
 
-	self->entries = tmp;
+void hists__collapse_resort(struct hists *hists)
+{
+	return __hists__collapse_resort(hists, false);
+}
+
+void hists__collapse_resort_threaded(struct hists *hists)
+{
+	return __hists__collapse_resort(hists, true);
 }
 
 /*
@@ -315,31 +424,43 @@ static void __hists__insert_output_entry(struct rb_root *entries,
 	rb_insert_color(&he->rb_node, entries);
 }
 
-void hists__output_resort(struct hists *self)
+static void __hists__output_resort(struct hists *hists, bool threaded)
 {
-	struct rb_root tmp;
+	struct rb_root *root;
 	struct rb_node *next;
 	struct hist_entry *n;
 	u64 min_callchain_hits;
 
-	min_callchain_hits = self->stats.total_period * (callchain_param.min_percent / 100);
+	min_callchain_hits = hists->stats.total_period * (callchain_param.min_percent / 100);
+
+	if (sort__need_collapse || threaded)
+		root = &hists->entries_collapsed;
+	else
+		root = hists->entries_in;
 
-	tmp = RB_ROOT;
-	next = rb_first(&self->entries);
+	next = rb_first(root);
+	hists->entries = RB_ROOT;
 
-	self->nr_entries = 0;
-	hists__reset_col_len(self);
+	hists->nr_entries = 0;
+	hists__reset_col_len(hists);
 
 	while (next) {
-		n = rb_entry(next, struct hist_entry, rb_node);
-		next = rb_next(&n->rb_node);
+		n = rb_entry(next, struct hist_entry, rb_node_in);
+		next = rb_next(&n->rb_node_in);
 
-		rb_erase(&n->rb_node, &self->entries);
-		__hists__insert_output_entry(&tmp, n, min_callchain_hits);
-		hists__inc_nr_entries(self, n);
+		__hists__insert_output_entry(&hists->entries, n, min_callchain_hits);
+		hists__inc_nr_entries(hists, n);
 	}
+}
 
-	self->entries = tmp;
+void hists__output_resort(struct hists *hists)
+{
+	return __hists__output_resort(hists, false);
+}
+
+void hists__output_resort_threaded(struct hists *hists)
+{
+	return __hists__output_resort(hists, true);
 }
 
 static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
@@ -594,12 +715,27 @@ static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
 	return ret;
 }
 
-int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
-			 struct hists *hists, struct hists *pair_hists,
-			 bool show_displacement, long displacement,
-			 bool color, u64 session_total)
+void hists__output_recalc_col_len(struct hists *hists, int max_rows)
+{
+	struct rb_node *next = rb_first(&hists->entries);
+	struct hist_entry *n;
+	int row = 0;
+
+	hists__reset_col_len(hists);
+
+	while (next && row++ < max_rows) {
+		n = rb_entry(next, struct hist_entry, rb_node);
+		if (!n->filtered)
+			hists__calc_col_len(hists, n);
+		next = rb_next(&n->rb_node);
+	}
+}
+
+static int hist_entry__pcnt_snprintf(struct hist_entry *self, char *s,
+				     size_t size, struct hists *pair_hists,
+				     bool show_displacement, long displacement,
+				     bool color, u64 session_total)
 {
-	struct sort_entry *se;
 	u64 period, total, period_sys, period_us, period_guest_sys, period_guest_us;
 	u64 nr_events;
 	const char *sep = symbol_conf.field_sep;
@@ -664,6 +800,13 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
 			ret += snprintf(s + ret, size - ret, "%11" PRIu64, nr_events);
 	}
 
+	if (symbol_conf.show_total_period) {
+		if (sep)
+			ret += snprintf(s + ret, size - ret, "%c%" PRIu64, *sep, period);
+		else
+			ret += snprintf(s + ret, size - ret, " %12" PRIu64, period);
+	}
+
 	if (pair_hists) {
 		char bf[32];
 		double old_percent = 0, new_percent = 0, diff;
@@ -698,26 +841,42 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
 		}
 	}
 
+	return ret;
+}
+
+int hist_entry__snprintf(struct hist_entry *he, char *s, size_t size,
+			 struct hists *hists)
+{
+	const char *sep = symbol_conf.field_sep;
+	struct sort_entry *se;
+	int ret = 0;
+
 	list_for_each_entry(se, &hist_entry__sort_list, list) {
 		if (se->elide)
 			continue;
 
 		ret += snprintf(s + ret, size - ret, "%s", sep ?: "  ");
-		ret += se->se_snprintf(self, s + ret, size - ret,
+		ret += se->se_snprintf(he, s + ret, size - ret,
 				       hists__col_len(hists, se->se_width_idx));
 	}
 
 	return ret;
 }
 
-int hist_entry__fprintf(struct hist_entry *self, struct hists *hists,
+int hist_entry__fprintf(struct hist_entry *he, size_t size, struct hists *hists,
 			struct hists *pair_hists, bool show_displacement,
 			long displacement, FILE *fp, u64 session_total)
 {
 	char bf[512];
-	hist_entry__snprintf(self, bf, sizeof(bf), hists, pair_hists,
-			     show_displacement, displacement,
-			     true, session_total);
+	int ret;
+
+	if (size == 0 || size > sizeof(bf))
+		size = sizeof(bf);
+
+	ret = hist_entry__pcnt_snprintf(he, bf, size, pair_hists,
+					show_displacement, displacement,
+					true, session_total);
+	hist_entry__snprintf(he, bf + ret, size - ret, hists);
 	return fprintf(fp, "%s\n", bf);
 }
 
@@ -738,8 +897,9 @@ static size_t hist_entry__fprintf_callchain(struct hist_entry *self,
 					     left_margin);
 }
 
-size_t hists__fprintf(struct hists *self, struct hists *pair,
-		      bool show_displacement, FILE *fp)
+size_t hists__fprintf(struct hists *hists, struct hists *pair,
+		      bool show_displacement, bool show_header, int max_rows,
+		      int max_cols, FILE *fp)
 {
 	struct sort_entry *se;
 	struct rb_node *nd;
@@ -749,9 +909,13 @@ size_t hists__fprintf(struct hists *self, struct hists *pair,
 	unsigned int width;
 	const char *sep = symbol_conf.field_sep;
 	const char *col_width = symbol_conf.col_width_list_str;
+	int nr_rows = 0;
 
 	init_rem_hits();
 
+	if (!show_header)
+		goto print_entries;
+
 	fprintf(fp, "# %s", pair ? "Baseline" : "Overhead");
 
 	if (symbol_conf.show_nr_samples) {
@@ -761,6 +925,13 @@ size_t hists__fprintf(struct hists *self, struct hists *pair,
 			fputs("  Samples  ", fp);
 	}
 
+	if (symbol_conf.show_total_period) {
+		if (sep)
+			ret += fprintf(fp, "%cPeriod", *sep);
+		else
+			ret += fprintf(fp, "   Period    ");
+	}
+
 	if (symbol_conf.show_cpu_utilization) {
 		if (sep) {
 			ret += fprintf(fp, "%csys", *sep);
@@ -803,18 +974,21 @@ size_t hists__fprintf(struct hists *self, struct hists *pair,
 		width = strlen(se->se_header);
 		if (symbol_conf.col_width_list_str) {
 			if (col_width) {
-				hists__set_col_len(self, se->se_width_idx,
+				hists__set_col_len(hists, se->se_width_idx,
 						   atoi(col_width));
 				col_width = strchr(col_width, ',');
 				if (col_width)
 					++col_width;
 			}
 		}
-		if (!hists__new_col_len(self, se->se_width_idx, width))
-			width = hists__col_len(self, se->se_width_idx);
+		if (!hists__new_col_len(hists, se->se_width_idx, width))
+			width = hists__col_len(hists, se->se_width_idx);
 		fprintf(fp, "  %*s", width, se->se_header);
 	}
+
 	fprintf(fp, "\n");
+	if (max_rows && ++nr_rows >= max_rows)
+		goto out;
 
 	if (sep)
 		goto print_entries;
@@ -822,6 +996,8 @@ size_t hists__fprintf(struct hists *self, struct hists *pair,
 	fprintf(fp, "# ........");
 	if (symbol_conf.show_nr_samples)
 		fprintf(fp, " ..........");
+	if (symbol_conf.show_total_period)
+		fprintf(fp, " ............");
 	if (pair) {
 		fprintf(fp, " ..........");
 		if (show_displacement)
@@ -834,17 +1010,23 @@ size_t hists__fprintf(struct hists *self, struct hists *pair,
 			continue;
 
 		fprintf(fp, "  ");
-		width = hists__col_len(self, se->se_width_idx);
+		width = hists__col_len(hists, se->se_width_idx);
 		if (width == 0)
 			width = strlen(se->se_header);
 		for (i = 0; i < width; i++)
 			fprintf(fp, ".");
 	}
 
-	fprintf(fp, "\n#\n");
+	fprintf(fp, "\n");
+	if (max_rows && ++nr_rows >= max_rows)
+		goto out;
+
+	fprintf(fp, "#\n");
+	if (max_rows && ++nr_rows >= max_rows)
+		goto out;
 
 print_entries:
-	for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
+	for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 
 		if (h->filtered)
@@ -858,19 +1040,22 @@ print_entries:
 				displacement = 0;
 			++position;
 		}
-		ret += hist_entry__fprintf(h, self, pair, show_displacement,
-					   displacement, fp, self->stats.total_period);
+		ret += hist_entry__fprintf(h, max_cols, hists, pair, show_displacement,
+					   displacement, fp, hists->stats.total_period);
 
 		if (symbol_conf.use_callchain)
-			ret += hist_entry__fprintf_callchain(h, self, fp,
-							     self->stats.total_period);
+			ret += hist_entry__fprintf_callchain(h, hists, fp,
+							     hists->stats.total_period);
+		if (max_rows && ++nr_rows >= max_rows)
+			goto out;
+
 		if (h->ms.map == NULL && verbose > 1) {
 			__map_groups__fprintf_maps(&h->thread->mg,
 						   MAP__FUNCTION, verbose, fp);
 			fprintf(fp, "%.10s end\n", graph_dotted_line);
 		}
 	}
-
+out:
 	free(rem_sq_bracket);
 
 	return ret;
@@ -879,7 +1064,7 @@ print_entries:
 /*
  * See hists__fprintf to match the column widths
  */
-unsigned int hists__sort_list_width(struct hists *self)
+unsigned int hists__sort_list_width(struct hists *hists)
 {
 	struct sort_entry *se;
 	int ret = 9; /* total % */
@@ -896,9 +1081,12 @@ unsigned int hists__sort_list_width(struct hists *self)
 	if (symbol_conf.show_nr_samples)
 		ret += 11;
 
+	if (symbol_conf.show_total_period)
+		ret += 13;
+
 	list_for_each_entry(se, &hist_entry__sort_list, list)
 		if (!se->elide)
-			ret += 2 + hists__col_len(self, se->se_width_idx);
+			ret += 2 + hists__col_len(hists, se->se_width_idx);
 
 	if (verbose) /* Addr + origin */
 		ret += 3 + BITS_PER_LONG / 4;
@@ -906,63 +1094,84 @@ unsigned int hists__sort_list_width(struct hists *self)
 	return ret;
 }
 
-static void hists__remove_entry_filter(struct hists *self, struct hist_entry *h,
+static void hists__remove_entry_filter(struct hists *hists, struct hist_entry *h,
 				       enum hist_filter filter)
 {
 	h->filtered &= ~(1 << filter);
 	if (h->filtered)
 		return;
 
-	++self->nr_entries;
+	++hists->nr_entries;
 	if (h->ms.unfolded)
-		self->nr_entries += h->nr_rows;
+		hists->nr_entries += h->nr_rows;
 	h->row_offset = 0;
-	self->stats.total_period += h->period;
-	self->stats.nr_events[PERF_RECORD_SAMPLE] += h->nr_events;
+	hists->stats.total_period += h->period;
+	hists->stats.nr_events[PERF_RECORD_SAMPLE] += h->nr_events;
 
-	hists__calc_col_len(self, h);
+	hists__calc_col_len(hists, h);
 }
 
-void hists__filter_by_dso(struct hists *self, const struct dso *dso)
+
+static bool hists__filter_entry_by_dso(struct hists *hists,
+				       struct hist_entry *he)
+{
+	if (hists->dso_filter != NULL &&
+	    (he->ms.map == NULL || he->ms.map->dso != hists->dso_filter)) {
+		he->filtered |= (1 << HIST_FILTER__DSO);
+		return true;
+	}
+
+	return false;
+}
+
+void hists__filter_by_dso(struct hists *hists)
 {
 	struct rb_node *nd;
 
-	self->nr_entries = self->stats.total_period = 0;
-	self->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
-	hists__reset_col_len(self);
+	hists->nr_entries = hists->stats.total_period = 0;
+	hists->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
+	hists__reset_col_len(hists);
 
-	for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
+	for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 
 		if (symbol_conf.exclude_other && !h->parent)
 			continue;
 
-		if (dso != NULL && (h->ms.map == NULL || h->ms.map->dso != dso)) {
-			h->filtered |= (1 << HIST_FILTER__DSO);
+		if (hists__filter_entry_by_dso(hists, h))
 			continue;
-		}
 
-		hists__remove_entry_filter(self, h, HIST_FILTER__DSO);
+		hists__remove_entry_filter(hists, h, HIST_FILTER__DSO);
 	}
 }
 
-void hists__filter_by_thread(struct hists *self, const struct thread *thread)
+static bool hists__filter_entry_by_thread(struct hists *hists,
+					  struct hist_entry *he)
+{
+	if (hists->thread_filter != NULL &&
+	    he->thread != hists->thread_filter) {
+		he->filtered |= (1 << HIST_FILTER__THREAD);
+		return true;
+	}
+
+	return false;
+}
+
+void hists__filter_by_thread(struct hists *hists)
 {
 	struct rb_node *nd;
 
-	self->nr_entries = self->stats.total_period = 0;
-	self->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
-	hists__reset_col_len(self);
+	hists->nr_entries = hists->stats.total_period = 0;
+	hists->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
+	hists__reset_col_len(hists);
 
-	for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
+	for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 
-		if (thread != NULL && h->thread != thread) {
-			h->filtered |= (1 << HIST_FILTER__THREAD);
+		if (hists__filter_entry_by_thread(hists, h))
 			continue;
-		}
 
-		hists__remove_entry_filter(self, h, HIST_FILTER__THREAD);
+		hists__remove_entry_filter(hists, h, HIST_FILTER__THREAD);
 	}
 }
 
@@ -976,13 +1185,13 @@ int hist_entry__annotate(struct hist_entry *he, size_t privsize)
 	return symbol__annotate(he->ms.sym, he->ms.map, privsize);
 }
 
-void hists__inc_nr_events(struct hists *self, u32 type)
+void hists__inc_nr_events(struct hists *hists, u32 type)
 {
-	++self->stats.nr_events[0];
-	++self->stats.nr_events[type];
+	++hists->stats.nr_events[0];
+	++hists->stats.nr_events[type];
 }
 
-size_t hists__fprintf_nr_events(struct hists *self, FILE *fp)
+size_t hists__fprintf_nr_events(struct hists *hists, FILE *fp)
 {
 	int i;
 	size_t ret = 0;
@@ -990,7 +1199,7 @@ size_t hists__fprintf_nr_events(struct hists *self, FILE *fp)
 	for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
 		const char *name;
 
-		if (self->stats.nr_events[i] == 0)
+		if (hists->stats.nr_events[i] == 0)
 			continue;
 
 		name = perf_event__name(i);
@@ -998,8 +1207,18 @@ size_t hists__fprintf_nr_events(struct hists *self, FILE *fp)
 			continue;
 
 		ret += fprintf(fp, "%16s events: %10d\n", name,
-			       self->stats.nr_events[i]);
+			       hists->stats.nr_events[i]);
 	}
 
 	return ret;
 }
+
+void hists__init(struct hists *hists)
+{
+	memset(hists, 0, sizeof(*hists));
+	hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
+	hists->entries_in = &hists->entries_in_array[0];
+	hists->entries_collapsed = RB_ROOT;
+	hists->entries = RB_ROOT;
+	pthread_mutex_init(&hists->lock, NULL);
+}
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 3beb97c..ff93ddc 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -2,6 +2,7 @@
 #define __PERF_HIST_H
 
 #include <linux/types.h>
+#include <pthread.h>
 #include "callchain.h"
 
 extern struct callchain_param callchain_param;
@@ -42,9 +43,18 @@ enum hist_column {
 	HISTC_NR_COLS, /* Last entry */
 };
 
+struct thread;
+struct dso;
+
 struct hists {
+	struct rb_root		entries_in_array[2];
+	struct rb_root		*entries_in;
 	struct rb_root		entries;
+	struct rb_root		entries_collapsed;
 	u64			nr_entries;
+	const struct thread	*thread_filter;
+	const struct dso	*dso_filter;
+	pthread_mutex_t		lock;
 	struct events_stats	stats;
 	u64			event_stream;
 	u16			col_len[HISTC_NR_COLS];
@@ -52,34 +62,42 @@ struct hists {
 	struct callchain_cursor	callchain_cursor;
 };
 
+void hists__init(struct hists *hists);
+
 struct hist_entry *__hists__add_entry(struct hists *self,
 				      struct addr_location *al,
 				      struct symbol *parent, u64 period);
 extern int64_t hist_entry__cmp(struct hist_entry *, struct hist_entry *);
 extern int64_t hist_entry__collapse(struct hist_entry *, struct hist_entry *);
-int hist_entry__fprintf(struct hist_entry *self, struct hists *hists,
+int hist_entry__fprintf(struct hist_entry *he, size_t size, struct hists *hists,
 			struct hists *pair_hists, bool show_displacement,
-			long displacement, FILE *fp, u64 total);
+			long displacement, FILE *fp, u64 session_total);
 int hist_entry__snprintf(struct hist_entry *self, char *bf, size_t size,
-			 struct hists *hists, struct hists *pair_hists,
-			 bool show_displacement, long displacement,
-			 bool color, u64 total);
+			 struct hists *hists);
 void hist_entry__free(struct hist_entry *);
 
 void hists__output_resort(struct hists *self);
+void hists__output_resort_threaded(struct hists *hists);
 void hists__collapse_resort(struct hists *self);
+void hists__collapse_resort_threaded(struct hists *hists);
+
+void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel);
+void hists__decay_entries_threaded(struct hists *hists, bool zap_user,
+				   bool zap_kernel);
+void hists__output_recalc_col_len(struct hists *hists, int max_rows);
 
 void hists__inc_nr_events(struct hists *self, u32 type);
 size_t hists__fprintf_nr_events(struct hists *self, FILE *fp);
 
 size_t hists__fprintf(struct hists *self, struct hists *pair,
-		      bool show_displacement, FILE *fp);
+		      bool show_displacement, bool show_header,
+		      int max_rows, int max_cols, FILE *fp);
 
 int hist_entry__inc_addr_samples(struct hist_entry *self, int evidx, u64 addr);
 int hist_entry__annotate(struct hist_entry *self, size_t privsize);
 
-void hists__filter_by_dso(struct hists *self, const struct dso *dso);
-void hists__filter_by_thread(struct hists *self, const struct thread *thread);
+void hists__filter_by_dso(struct hists *hists);
+void hists__filter_by_thread(struct hists *hists);
 
 u16 hists__col_len(struct hists *self, enum hist_column col);
 void hists__set_col_len(struct hists *self, enum hist_column col, u16 len);
@@ -90,26 +108,33 @@ struct perf_evlist;
 #ifdef NO_NEWT_SUPPORT
 static inline
 int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __used,
-				  const char *help __used)
+				  const char *help __used,
+				  void(*timer)(void *arg) __used,
+				  void *arg __used,
+				  int refresh __used)
 {
 	return 0;
 }
 
 static inline int hist_entry__tui_annotate(struct hist_entry *self __used,
-					   int evidx __used)
+					   int evidx __used,
+					   int nr_events __used,
+					   void(*timer)(void *arg) __used,
+					   void *arg __used,
+					   int delay_secs __used)
 {
 	return 0;
 }
-#define KEY_LEFT -1
-#define KEY_RIGHT -2
+#define K_LEFT -1
+#define K_RIGHT -2
 #else
-#include <newt.h>
-int hist_entry__tui_annotate(struct hist_entry *self, int evidx);
-
-#define KEY_LEFT NEWT_KEY_LEFT
-#define KEY_RIGHT NEWT_KEY_RIGHT
+#include "ui/keysyms.h"
+int hist_entry__tui_annotate(struct hist_entry *he, int evidx, int nr_events,
+			     void(*timer)(void *arg), void *arg, int delay_secs);
 
-int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help);
+int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
+				  void(*timer)(void *arg), void *arg,
+				  int refresh);
 #endif
 
 unsigned int hists__sort_list_width(struct hists *self);
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index a16ecab..78284b1 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -18,6 +18,13 @@ static inline int is_anon_memory(const char *filename)
 	return strcmp(filename, "//anon") == 0;
 }
 
+static inline int is_no_dso_memory(const char *filename)
+{
+	return !strcmp(filename, "[stack]") ||
+	       !strcmp(filename, "[vdso]")  ||
+	       !strcmp(filename, "[heap]");
+}
+
 void map__init(struct map *self, enum map_type type,
 	       u64 start, u64 end, u64 pgoff, struct dso *dso)
 {
@@ -42,9 +49,10 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
 	if (self != NULL) {
 		char newfilename[PATH_MAX];
 		struct dso *dso;
-		int anon;
+		int anon, no_dso;
 
 		anon = is_anon_memory(filename);
+		no_dso = is_no_dso_memory(filename);
 
 		if (anon) {
 			snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
@@ -57,12 +65,16 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
 
 		map__init(self, type, start, start + len, pgoff, dso);
 
-		if (anon) {
-set_identity:
+		if (anon || no_dso) {
 			self->map_ip = self->unmap_ip = identity__map_ip;
-		} else if (strcmp(filename, "[vdso]") == 0) {
-			dso__set_loaded(dso, self->type);
-			goto set_identity;
+
+			/*
+			 * Set memory without DSO as loaded. All map__find_*
+			 * functions still return NULL, and we avoid the
+			 * unnecessary map__load warning.
+			 */
+			if (no_dso)
+				dso__set_loaded(dso, self->type);
 		}
 	}
 	return self;
@@ -127,8 +139,8 @@ int map__load(struct map *self, symbol_filter_t filter)
 
 		if (len > sizeof(DSO__DELETED) &&
 		    strcmp(name + real_len + 1, DSO__DELETED) == 0) {
-			pr_warning("%.*s was updated, restart the long "
-				   "running apps that use it!\n",
+			pr_warning("%.*s was updated (is prelink enabled?). "
+				"Restart the long running apps that use it!\n",
 				   (int)real_len, name);
 		} else {
 			pr_warning("no symbols found in %s, maybe install "
@@ -220,55 +232,55 @@ u64 map__objdump_2ip(struct map *map, u64 addr)
 	return ip;
 }
 
-void map_groups__init(struct map_groups *self)
+void map_groups__init(struct map_groups *mg)
 {
 	int i;
 	for (i = 0; i < MAP__NR_TYPES; ++i) {
-		self->maps[i] = RB_ROOT;
-		INIT_LIST_HEAD(&self->removed_maps[i]);
+		mg->maps[i] = RB_ROOT;
+		INIT_LIST_HEAD(&mg->removed_maps[i]);
 	}
-	self->machine = NULL;
+	mg->machine = NULL;
 }
 
-static void maps__delete(struct rb_root *self)
+static void maps__delete(struct rb_root *maps)
 {
-	struct rb_node *next = rb_first(self);
+	struct rb_node *next = rb_first(maps);
 
 	while (next) {
 		struct map *pos = rb_entry(next, struct map, rb_node);
 
 		next = rb_next(&pos->rb_node);
-		rb_erase(&pos->rb_node, self);
+		rb_erase(&pos->rb_node, maps);
 		map__delete(pos);
 	}
 }
 
-static void maps__delete_removed(struct list_head *self)
+static void maps__delete_removed(struct list_head *maps)
 {
 	struct map *pos, *n;
 
-	list_for_each_entry_safe(pos, n, self, node) {
+	list_for_each_entry_safe(pos, n, maps, node) {
 		list_del(&pos->node);
 		map__delete(pos);
 	}
 }
 
-void map_groups__exit(struct map_groups *self)
+void map_groups__exit(struct map_groups *mg)
 {
 	int i;
 
 	for (i = 0; i < MAP__NR_TYPES; ++i) {
-		maps__delete(&self->maps[i]);
-		maps__delete_removed(&self->removed_maps[i]);
+		maps__delete(&mg->maps[i]);
+		maps__delete_removed(&mg->removed_maps[i]);
 	}
 }
 
-void map_groups__flush(struct map_groups *self)
+void map_groups__flush(struct map_groups *mg)
 {
 	int type;
 
 	for (type = 0; type < MAP__NR_TYPES; type++) {
-		struct rb_root *root = &self->maps[type];
+		struct rb_root *root = &mg->maps[type];
 		struct rb_node *next = rb_first(root);
 
 		while (next) {
@@ -280,17 +292,17 @@ void map_groups__flush(struct map_groups *self)
 			 * instance in some hist_entry instances, so
 			 * just move them to a separate list.
 			 */
-			list_add_tail(&pos->node, &self->removed_maps[pos->type]);
+			list_add_tail(&pos->node, &mg->removed_maps[pos->type]);
 		}
 	}
 }
 
-struct symbol *map_groups__find_symbol(struct map_groups *self,
+struct symbol *map_groups__find_symbol(struct map_groups *mg,
 				       enum map_type type, u64 addr,
 				       struct map **mapp,
 				       symbol_filter_t filter)
 {
-	struct map *map = map_groups__find(self, type, addr);
+	struct map *map = map_groups__find(mg, type, addr);
 
 	if (map != NULL) {
 		if (mapp != NULL)
@@ -301,7 +313,7 @@ struct symbol *map_groups__find_symbol(struct map_groups *self,
 	return NULL;
 }
 
-struct symbol *map_groups__find_symbol_by_name(struct map_groups *self,
+struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
 					       enum map_type type,
 					       const char *name,
 					       struct map **mapp,
@@ -309,7 +321,7 @@ struct symbol *map_groups__find_symbol_by_name(struct map_groups *self,
 {
 	struct rb_node *nd;
 
-	for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
+	for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) {
 		struct map *pos = rb_entry(nd, struct map, rb_node);
 		struct symbol *sym = map__find_symbol_by_name(pos, name, filter);
 
@@ -323,13 +335,13 @@ struct symbol *map_groups__find_symbol_by_name(struct map_groups *self,
 	return NULL;
 }
 
-size_t __map_groups__fprintf_maps(struct map_groups *self,
+size_t __map_groups__fprintf_maps(struct map_groups *mg,
 				  enum map_type type, int verbose, FILE *fp)
 {
 	size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
 	struct rb_node *nd;
 
-	for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
+	for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) {
 		struct map *pos = rb_entry(nd, struct map, rb_node);
 		printed += fprintf(fp, "Map:");
 		printed += map__fprintf(pos, fp);
@@ -342,22 +354,22 @@ size_t __map_groups__fprintf_maps(struct map_groups *self,
 	return printed;
 }
 
-size_t map_groups__fprintf_maps(struct map_groups *self, int verbose, FILE *fp)
+size_t map_groups__fprintf_maps(struct map_groups *mg, int verbose, FILE *fp)
 {
 	size_t printed = 0, i;
 	for (i = 0; i < MAP__NR_TYPES; ++i)
-		printed += __map_groups__fprintf_maps(self, i, verbose, fp);
+		printed += __map_groups__fprintf_maps(mg, i, verbose, fp);
 	return printed;
 }
 
-static size_t __map_groups__fprintf_removed_maps(struct map_groups *self,
+static size_t __map_groups__fprintf_removed_maps(struct map_groups *mg,
 						 enum map_type type,
 						 int verbose, FILE *fp)
 {
 	struct map *pos;
 	size_t printed = 0;
 
-	list_for_each_entry(pos, &self->removed_maps[type], node) {
+	list_for_each_entry(pos, &mg->removed_maps[type], node) {
 		printed += fprintf(fp, "Map:");
 		printed += map__fprintf(pos, fp);
 		if (verbose > 1) {
@@ -368,26 +380,26 @@ static size_t __map_groups__fprintf_removed_maps(struct map_groups *self,
 	return printed;
 }
 
-static size_t map_groups__fprintf_removed_maps(struct map_groups *self,
+static size_t map_groups__fprintf_removed_maps(struct map_groups *mg,
 					       int verbose, FILE *fp)
 {
 	size_t printed = 0, i;
 	for (i = 0; i < MAP__NR_TYPES; ++i)
-		printed += __map_groups__fprintf_removed_maps(self, i, verbose, fp);
+		printed += __map_groups__fprintf_removed_maps(mg, i, verbose, fp);
 	return printed;
 }
 
-size_t map_groups__fprintf(struct map_groups *self, int verbose, FILE *fp)
+size_t map_groups__fprintf(struct map_groups *mg, int verbose, FILE *fp)
 {
-	size_t printed = map_groups__fprintf_maps(self, verbose, fp);
+	size_t printed = map_groups__fprintf_maps(mg, verbose, fp);
 	printed += fprintf(fp, "Removed maps:\n");
-	return printed + map_groups__fprintf_removed_maps(self, verbose, fp);
+	return printed + map_groups__fprintf_removed_maps(mg, verbose, fp);
 }
 
-int map_groups__fixup_overlappings(struct map_groups *self, struct map *map,
+int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
 				   int verbose, FILE *fp)
 {
-	struct rb_root *root = &self->maps[map->type];
+	struct rb_root *root = &mg->maps[map->type];
 	struct rb_node *next = rb_first(root);
 	int err = 0;
 
@@ -418,7 +430,7 @@ int map_groups__fixup_overlappings(struct map_groups *self, struct map *map,
 			}
 
 			before->end = map->start - 1;
-			map_groups__insert(self, before);
+			map_groups__insert(mg, before);
 			if (verbose >= 2)
 				map__fprintf(before, fp);
 		}
@@ -432,7 +444,7 @@ int map_groups__fixup_overlappings(struct map_groups *self, struct map *map,
 			}
 
 			after->start = map->end + 1;
-			map_groups__insert(self, after);
+			map_groups__insert(mg, after);
 			if (verbose >= 2)
 				map__fprintf(after, fp);
 		}
@@ -441,7 +453,7 @@ move_map:
 		 * If we have references, just move them to a separate list.
 		 */
 		if (pos->referenced)
-			list_add_tail(&pos->node, &self->removed_maps[map->type]);
+			list_add_tail(&pos->node, &mg->removed_maps[map->type]);
 		else
 			map__delete(pos);
 
@@ -455,7 +467,7 @@ move_map:
 /*
  * XXX This should not really _copy_ te maps, but refcount them.
  */
-int map_groups__clone(struct map_groups *self,
+int map_groups__clone(struct map_groups *mg,
 		      struct map_groups *parent, enum map_type type)
 {
 	struct rb_node *nd;
@@ -464,7 +476,7 @@ int map_groups__clone(struct map_groups *self,
 		struct map *new = map__clone(map);
 		if (new == NULL)
 			return -ENOMEM;
-		map_groups__insert(self, new);
+		map_groups__insert(mg, new);
 	}
 	return 0;
 }
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index b397c03..890d855 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -123,17 +123,17 @@ void map__fixup_end(struct map *self);
 
 void map__reloc_vmlinux(struct map *self);
 
-size_t __map_groups__fprintf_maps(struct map_groups *self,
+size_t __map_groups__fprintf_maps(struct map_groups *mg,
 				  enum map_type type, int verbose, FILE *fp);
 void maps__insert(struct rb_root *maps, struct map *map);
-void maps__remove(struct rb_root *self, struct map *map);
+void maps__remove(struct rb_root *maps, struct map *map);
 struct map *maps__find(struct rb_root *maps, u64 addr);
-void map_groups__init(struct map_groups *self);
-void map_groups__exit(struct map_groups *self);
-int map_groups__clone(struct map_groups *self,
+void map_groups__init(struct map_groups *mg);
+void map_groups__exit(struct map_groups *mg);
+int map_groups__clone(struct map_groups *mg,
 		      struct map_groups *parent, enum map_type type);
-size_t map_groups__fprintf(struct map_groups *self, int verbose, FILE *fp);
-size_t map_groups__fprintf_maps(struct map_groups *self, int verbose, FILE *fp);
+size_t map_groups__fprintf(struct map_groups *mg, int verbose, FILE *fp);
+size_t map_groups__fprintf_maps(struct map_groups *mg, int verbose, FILE *fp);
 
 typedef void (*machine__process_t)(struct machine *self, void *data);
 
@@ -162,29 +162,29 @@ static inline bool machine__is_host(struct machine *self)
 	return self ? self->pid == HOST_KERNEL_ID : false;
 }
 
-static inline void map_groups__insert(struct map_groups *self, struct map *map)
+static inline void map_groups__insert(struct map_groups *mg, struct map *map)
 {
-	maps__insert(&self->maps[map->type], map);
-	map->groups = self;
+	maps__insert(&mg->maps[map->type], map);
+	map->groups = mg;
 }
 
-static inline void map_groups__remove(struct map_groups *self, struct map *map)
+static inline void map_groups__remove(struct map_groups *mg, struct map *map)
 {
-	maps__remove(&self->maps[map->type], map);
+	maps__remove(&mg->maps[map->type], map);
 }
 
-static inline struct map *map_groups__find(struct map_groups *self,
+static inline struct map *map_groups__find(struct map_groups *mg,
 					   enum map_type type, u64 addr)
 {
-	return maps__find(&self->maps[type], addr);
+	return maps__find(&mg->maps[type], addr);
 }
 
-struct symbol *map_groups__find_symbol(struct map_groups *self,
+struct symbol *map_groups__find_symbol(struct map_groups *mg,
 				       enum map_type type, u64 addr,
 				       struct map **mapp,
 				       symbol_filter_t filter);
 
-struct symbol *map_groups__find_symbol_by_name(struct map_groups *self,
+struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
 					       enum map_type type,
 					       const char *name,
 					       struct map **mapp,
@@ -208,11 +208,11 @@ struct symbol *machine__find_kernel_function(struct machine *self, u64 addr,
 }
 
 static inline
-struct symbol *map_groups__find_function_by_name(struct map_groups *self,
+struct symbol *map_groups__find_function_by_name(struct map_groups *mg,
 						 const char *name, struct map **mapp,
 						 symbol_filter_t filter)
 {
-	return map_groups__find_symbol_by_name(self, MAP__FUNCTION, name, mapp, filter);
+	return map_groups__find_symbol_by_name(mg, MAP__FUNCTION, name, mapp, filter);
 }
 
 static inline
@@ -225,13 +225,13 @@ struct symbol *machine__find_kernel_function_by_name(struct machine *self,
 						 filter);
 }
 
-int map_groups__fixup_overlappings(struct map_groups *self, struct map *map,
+int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
 				   int verbose, FILE *fp);
 
-struct map *map_groups__find_by_name(struct map_groups *self,
+struct map *map_groups__find_by_name(struct map_groups *mg,
 				     enum map_type type, const char *name);
 struct map *machine__new_module(struct machine *self, u64 start, const char *filename);
 
-void map_groups__flush(struct map_groups *self);
+void map_groups__flush(struct map_groups *mg);
 
 #endif /* __PERF_MAP_H */
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 1c7bfa5..eb25900 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1956,8 +1956,10 @@ static int __del_trace_probe_event(int fd, struct str_node *ent)
 
 	pr_debug("Writing event: %s\n", buf);
 	ret = write(fd, buf, strlen(buf));
-	if (ret < 0)
+	if (ret < 0) {
+		ret = -errno;
 		goto error;
+	}
 
 	printf("Remove event: %s\n", ent->s);
 	return 0;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 72458d9..20e011c 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1326,3 +1326,22 @@ int perf_session__cpu_bitmap(struct perf_session *session,
 
 	return 0;
 }
+
+void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
+				bool full)
+{
+	struct stat st;
+	int ret;
+
+	if (session == NULL || fp == NULL)
+		return;
+
+	ret = fstat(session->fd, &st);
+	if (ret == -1)
+		return;
+
+	fprintf(fp, "# ========\n");
+	fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
+	perf_header__fprintf_info(session, fp, full);
+	fprintf(fp, "# ========\n#\n");
+}
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 974d0cb..514b06d 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -177,4 +177,5 @@ void perf_session__print_ip(union perf_event *event,
 int perf_session__cpu_bitmap(struct perf_session *session,
 			     const char *cpu_list, unsigned long *cpu_bitmap);
 
+void perf_session__fprintf_info(struct perf_session *s, FILE *fp, bool full);
 #endif /* __PERF_SESSION_H */
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 1ee8f1e..16da30d 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -177,7 +177,9 @@ static int hist_entry__sym_snprintf(struct hist_entry *self, char *bf,
 				       BITS_PER_LONG / 4, self->ip, o);
 	}
 
-	ret += repsep_snprintf(bf + ret, size - ret, "[%c] ", self->level);
+	if (!sort_dso.elide)
+		ret += repsep_snprintf(bf + ret, size - ret, "[%c] ", self->level);
+
 	if (self->ms.sym)
 		ret += repsep_snprintf(bf + ret, size - ret, "%s",
 				       self->ms.sym->name);
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 77d0388..3f67ae3 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -45,6 +45,7 @@ extern enum sort_type sort__first_dimension;
  * @nr_rows - rows expanded in callchain, recalculated on folding/unfolding
  */
 struct hist_entry {
+	struct rb_node		rb_node_in;
 	struct rb_node		rb_node;
 	u64			period;
 	u64			period_sys;
@@ -63,6 +64,7 @@ struct hist_entry {
 
 	bool			init_have_children;
 	char			level;
+	bool			used;
 	u8			filtered;
 	struct symbol		*parent;
 	union {
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 40eeaf0..632b50c 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -24,7 +24,7 @@
 #include <sys/utsname.h>
 
 #ifndef KSYM_NAME_LEN
-#define KSYM_NAME_LEN 128
+#define KSYM_NAME_LEN 256
 #endif
 
 #ifndef NT_GNU_BUILD_ID
@@ -46,6 +46,7 @@ struct symbol_conf symbol_conf = {
 	.exclude_other	  = true,
 	.use_modules	  = true,
 	.try_vmlinux_path = true,
+	.annotate_src	  = true,
 	.symfs            = "",
 };
 
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 4f377d9..29f8d74 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -72,11 +72,14 @@ struct symbol_conf {
 			use_modules,
 			sort_by_name,
 			show_nr_samples,
+			show_total_period,
 			use_callchain,
 			exclude_other,
 			show_cpu_utilization,
 			initialized,
-			kptr_restrict;
+			kptr_restrict,
+			annotate_asm_raw,
+			annotate_src;
 	const char	*vmlinux_name,
 			*kallsyms_name,
 			*source_prefix,
diff --git a/tools/perf/util/top.c b/tools/perf/util/top.c
index a11f607..500471d 100644
--- a/tools/perf/util/top.c
+++ b/tools/perf/util/top.c
@@ -15,52 +15,6 @@
 #include "top.h"
 #include <inttypes.h>
 
-/*
- * Ordering weight: count-1 * count-2 * ... / count-n
- */
-static double sym_weight(const struct sym_entry *sym, struct perf_top *top)
-{
-	double weight = sym->snap_count;
-	int counter;
-
-	if (!top->display_weighted)
-		return weight;
-
-	for (counter = 1; counter < top->evlist->nr_entries - 1; counter++)
-		weight *= sym->count[counter];
-
-	weight /= (sym->count[counter] + 1);
-
-	return weight;
-}
-
-static void perf_top__remove_active_sym(struct perf_top *top, struct sym_entry *syme)
-{
-	pthread_mutex_lock(&top->active_symbols_lock);
-	list_del_init(&syme->node);
-	pthread_mutex_unlock(&top->active_symbols_lock);
-}
-
-static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
-{
-	struct rb_node **p = &tree->rb_node;
-	struct rb_node *parent = NULL;
-	struct sym_entry *iter;
-
-	while (*p != NULL) {
-		parent = *p;
-		iter = rb_entry(parent, struct sym_entry, rb_node);
-
-		if (se->weight > iter->weight)
-			p = &(*p)->rb_left;
-		else
-			p = &(*p)->rb_right;
-	}
-
-	rb_link_node(&se->rb_node, parent, p);
-	rb_insert_color(&se->rb_node, tree);
-}
-
 #define SNPRINTF(buf, size, fmt, args...) \
 ({ \
 	size_t r = snprintf(buf, size, fmt, ## args); \
@@ -69,7 +23,6 @@ static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
 
 size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
 {
-	struct perf_evsel *counter;
 	float samples_per_sec = top->samples / top->delay_secs;
 	float ksamples_per_sec = top->kernel_samples / top->delay_secs;
 	float esamples_percent = (100.0 * top->exact_samples) / top->samples;
@@ -104,7 +57,7 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
 			       esamples_percent);
 	}
 
-	if (top->evlist->nr_entries == 1 || !top->display_weighted) {
+	if (top->evlist->nr_entries == 1) {
 		struct perf_evsel *first;
 		first = list_entry(top->evlist->entries.next, struct perf_evsel, node);
 		ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
@@ -112,27 +65,7 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
 				top->freq ? "Hz" : "");
 	}
 
-	if (!top->display_weighted) {
-		ret += SNPRINTF(bf + ret, size - ret, "%s",
-				event_name(top->sym_evsel));
-	} else {
-		/*
-		 * Don't let events eat all the space. Leaving 30 bytes
-		 * for the rest should be enough.
-		 */
-		size_t last_pos = size - 30;
-
-		list_for_each_entry(counter, &top->evlist->entries, node) {
-			ret += SNPRINTF(bf + ret, size - ret, "%s%s",
-					counter->idx ? "/" : "",
-					event_name(counter));
-			if (ret > last_pos) {
-				sprintf(bf + last_pos - 3, "..");
-				ret = last_pos - 1;
-				break;
-			}
-		}
-	}
+	ret += SNPRINTF(bf + ret, size - ret, "%s", event_name(top->sym_evsel));
 
 	ret += SNPRINTF(bf + ret, size - ret, "], ");
 
@@ -166,73 +99,3 @@ void perf_top__reset_sample_counters(struct perf_top *top)
 	top->exact_samples = top->guest_kernel_samples =
 	top->guest_us_samples = 0;
 }
-
-float perf_top__decay_samples(struct perf_top *top, struct rb_root *root)
-{
-	struct sym_entry *syme, *n;
-	float sum_ksamples = 0.0;
-	int snap = !top->display_weighted ? top->sym_evsel->idx : 0, j;
-
-	/* Sort the active symbols */
-	pthread_mutex_lock(&top->active_symbols_lock);
-	syme = list_entry(top->active_symbols.next, struct sym_entry, node);
-	pthread_mutex_unlock(&top->active_symbols_lock);
-
-	top->rb_entries = 0;
-	list_for_each_entry_safe_from(syme, n, &top->active_symbols, node) {
-		syme->snap_count = syme->count[snap];
-		if (syme->snap_count != 0) {
-
-			if ((top->hide_user_symbols &&
-			     syme->map->dso->kernel == DSO_TYPE_USER) ||
-			    (top->hide_kernel_symbols &&
-			     syme->map->dso->kernel == DSO_TYPE_KERNEL)) {
-				perf_top__remove_active_sym(top, syme);
-				continue;
-			}
-			syme->weight = sym_weight(syme, top);
-
-			if ((int)syme->snap_count >= top->count_filter) {
-				rb_insert_active_sym(root, syme);
-				++top->rb_entries;
-			}
-			sum_ksamples += syme->snap_count;
-
-			for (j = 0; j < top->evlist->nr_entries; j++)
-				syme->count[j] = top->zero ? 0 : syme->count[j] * 7 / 8;
-		} else
-			perf_top__remove_active_sym(top, syme);
-	}
-
-	return sum_ksamples;
-}
-
-/*
- * Find the longest symbol name that will be displayed
- */
-void perf_top__find_widths(struct perf_top *top, struct rb_root *root,
-			   int *dso_width, int *dso_short_width, int *sym_width)
-{
-	struct rb_node *nd;
-	int printed = 0;
-
-	*sym_width = *dso_width = *dso_short_width = 0;
-
-	for (nd = rb_first(root); nd; nd = rb_next(nd)) {
-		struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node);
-		struct symbol *sym = sym_entry__symbol(syme);
-
-		if (++printed > top->print_entries ||
-		    (int)syme->snap_count < top->count_filter)
-			continue;
-
-		if (syme->map->dso->long_name_len > *dso_width)
-			*dso_width = syme->map->dso->long_name_len;
-
-		if (syme->map->dso->short_name_len > *dso_short_width)
-			*dso_short_width = syme->map->dso->short_name_len;
-
-		if (sym->namelen > *sym_width)
-			*sym_width = sym->namelen;
-	}
-}
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index bfbf95b..01d1057 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -4,26 +4,10 @@
 #include "types.h"
 #include "../perf.h"
 #include <stddef.h>
-#include <pthread.h>
-#include <linux/list.h>
-#include <linux/rbtree.h>
 
 struct perf_evlist;
 struct perf_evsel;
-
-struct sym_entry {
-	struct rb_node		rb_node;
-	struct list_head	node;
-	unsigned long		snap_count;
-	double			weight;
-	struct map		*map;
-	unsigned long		count[0];
-};
-
-static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
-{
-       return ((void *)self) + symbol_conf.priv_size;
-}
+struct perf_session;
 
 struct perf_top {
 	struct perf_evlist *evlist;
@@ -31,34 +15,21 @@ struct perf_top {
 	 * Symbols will be added here in perf_event__process_sample and will
 	 * get out after decayed.
 	 */
-	struct list_head   active_symbols;
-	pthread_mutex_t	   active_symbols_lock;
-	pthread_cond_t	   active_symbols_cond;
 	u64		   samples;
 	u64		   kernel_samples, us_samples;
 	u64		   exact_samples;
 	u64		   guest_us_samples, guest_kernel_samples;
+	u64		   total_lost_warned;
 	int		   print_entries, count_filter, delay_secs;
-	int		   display_weighted, freq, rb_entries;
+	int		   freq;
 	pid_t		   target_pid, target_tid;
 	bool		   hide_kernel_symbols, hide_user_symbols, zero;
 	const char	   *cpu_list;
-	struct sym_entry   *sym_filter_entry;
+	struct hist_entry  *sym_filter_entry;
 	struct perf_evsel  *sym_evsel;
+	struct perf_session *session;
 };
 
 size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size);
 void perf_top__reset_sample_counters(struct perf_top *top);
-float perf_top__decay_samples(struct perf_top *top, struct rb_root *root);
-void perf_top__find_widths(struct perf_top *top, struct rb_root *root,
-			   int *dso_width, int *dso_short_width, int *sym_width);
-
-#ifdef NO_NEWT_SUPPORT
-static inline int perf_top__tui_browser(struct perf_top *top __used)
-{
-	return 0;
-}
-#else
-int perf_top__tui_browser(struct perf_top *top);
-#endif
 #endif /* __PERF_TOP_H */
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index 3403f81..2d530cf 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -196,7 +196,8 @@ static void record_file(const char *file, size_t hdr_sz)
 		die("Can't read '%s'", file);
 
 	/* put in zeros for file size, then fill true size later */
-	write_or_die(&size, hdr_sz);
+	if (hdr_sz)
+		write_or_die(&size, hdr_sz);
 
 	do {
 		r = read(fd, buf, BUFSIZ);
@@ -212,7 +213,7 @@ static void record_file(const char *file, size_t hdr_sz)
 	if (bigendian())
 		sizep += sizeof(u64) - hdr_sz;
 
-	if (pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0)
+	if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0)
 		die("writing to %s", output_file);
 }
 
@@ -428,6 +429,19 @@ get_tracepoints_path(struct list_head *pattrs)
 	return nr_tracepoints > 0 ? path.next : NULL;
 }
 
+static void
+put_tracepoints_path(struct tracepoint_path *tps)
+{
+	while (tps) {
+		struct tracepoint_path *t = tps;
+
+		tps = tps->next;
+		free(t->name);
+		free(t->system);
+		free(t);
+	}
+}
+
 bool have_tracepoints(struct list_head *pattrs)
 {
 	struct perf_evsel *pos;
@@ -439,19 +453,11 @@ bool have_tracepoints(struct list_head *pattrs)
 	return false;
 }
 
-int read_tracing_data(int fd, struct list_head *pattrs)
+static void tracing_data_header(void)
 {
-	char buf[BUFSIZ];
-	struct tracepoint_path *tps = get_tracepoints_path(pattrs);
-
-	/*
-	 * What? No tracepoints? No sense writing anything here, bail out.
-	 */
-	if (tps == NULL)
-		return -1;
-
-	output_fd = fd;
+	char buf[20];
 
+	/* just guessing this is someone's birthday.. ;) */
 	buf[0] = 23;
 	buf[1] = 8;
 	buf[2] = 68;
@@ -476,28 +482,86 @@ int read_tracing_data(int fd, struct list_head *pattrs)
 	/* save page_size */
 	page_size = sysconf(_SC_PAGESIZE);
 	write_or_die(&page_size, 4);
+}
+
+struct tracing_data *tracing_data_get(struct list_head *pattrs,
+				      int fd, bool temp)
+{
+	struct tracepoint_path *tps;
+	struct tracing_data *tdata;
+
+	output_fd = fd;
+
+	tps = get_tracepoints_path(pattrs);
+	if (!tps)
+		return NULL;
 
+	tdata = malloc_or_die(sizeof(*tdata));
+	tdata->temp = temp;
+	tdata->size = 0;
+
+	if (temp) {
+		int temp_fd;
+
+		snprintf(tdata->temp_file, sizeof(tdata->temp_file),
+			 "/tmp/perf-XXXXXX");
+		if (!mkstemp(tdata->temp_file))
+			die("Can't make temp file");
+
+		temp_fd = open(tdata->temp_file, O_RDWR);
+		if (temp_fd < 0)
+			die("Can't read '%s'", tdata->temp_file);
+
+		/*
+		 * Set the temp file the default output, so all the
+		 * tracing data are stored into it.
+		 */
+		output_fd = temp_fd;
+	}
+
+	tracing_data_header();
 	read_header_files();
 	read_ftrace_files(tps);
 	read_event_files(tps);
 	read_proc_kallsyms();
 	read_ftrace_printk();
 
-	return 0;
+	/*
+	 * All tracing data are stored by now, we can restore
+	 * the default output file in case we used temp file.
+	 */
+	if (temp) {
+		tdata->size = lseek(output_fd, 0, SEEK_CUR);
+		close(output_fd);
+		output_fd = fd;
+	}
+
+	put_tracepoints_path(tps);
+	return tdata;
 }
 
-ssize_t read_tracing_data_size(int fd, struct list_head *pattrs)
+void tracing_data_put(struct tracing_data *tdata)
 {
-	ssize_t size;
-	int err = 0;
+	if (tdata->temp) {
+		record_file(tdata->temp_file, 0);
+		unlink(tdata->temp_file);
+	}
 
-	calc_data_size = 1;
-	err = read_tracing_data(fd, pattrs);
-	size = calc_data_size - 1;
-	calc_data_size = 0;
+	free(tdata);
+}
 
-	if (err < 0)
-		return err;
+int read_tracing_data(int fd, struct list_head *pattrs)
+{
+	struct tracing_data *tdata;
 
-	return size;
+	/*
+	 * We work over the real file, so we can write data
+	 * directly, no temp file is needed.
+	 */
+	tdata = tracing_data_get(pattrs, fd, false);
+	if (!tdata)
+		return -ENOMEM;
+
+	tracing_data_put(tdata);
+	return 0;
 }
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index f674dda..a841008 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -263,7 +263,18 @@ void *raw_field_ptr(struct event *event, const char *name, void *data);
 unsigned long long eval_flag(const char *flag);
 
 int read_tracing_data(int fd, struct list_head *pattrs);
-ssize_t read_tracing_data_size(int fd, struct list_head *pattrs);
+
+struct tracing_data {
+	/* size is only valid if temp is 'true' */
+	ssize_t size;
+	bool temp;
+	char temp_file[50];
+};
+
+struct tracing_data *tracing_data_get(struct list_head *pattrs,
+				      int fd, bool temp);
+void tracing_data_put(struct tracing_data *tdata);
+
 
 /* taken from kernel/trace/trace.h */
 enum trace_flag_type {
diff --git a/tools/perf/util/ui/browser.c b/tools/perf/util/ui/browser.c
index 611219f..5359f37 100644
--- a/tools/perf/util/ui/browser.c
+++ b/tools/perf/util/ui/browser.c
@@ -1,4 +1,8 @@
+#include "../util.h"
+#include "../cache.h"
+#include "../../perf.h"
 #include "libslang.h"
+#include <newt.h>
 #include "ui.h"
 #include <linux/compiler.h>
 #include <linux/list.h>
@@ -7,13 +11,13 @@
 #include <sys/ttydefaults.h>
 #include "browser.h"
 #include "helpline.h"
+#include "keysyms.h"
 #include "../color.h"
-#include "../util.h"
-#include <stdio.h>
 
-static int ui_browser__percent_color(double percent, bool current)
+static int ui_browser__percent_color(struct ui_browser *browser,
+				     double percent, bool current)
 {
-	if (current)
+	if (current && (!browser->use_navkeypressed || browser->navkeypressed))
 		return HE_COLORSET_SELECTED;
 	if (percent >= MIN_RED)
 		return HE_COLORSET_TOP;
@@ -30,7 +34,7 @@ void ui_browser__set_color(struct ui_browser *self __used, int color)
 void ui_browser__set_percent_color(struct ui_browser *self,
 				   double percent, bool current)
 {
-	 int color = ui_browser__percent_color(percent, current);
+	 int color = ui_browser__percent_color(self, percent, current);
 	 ui_browser__set_color(self, color);
 }
 
@@ -39,31 +43,62 @@ void ui_browser__gotorc(struct ui_browser *self, int y, int x)
 	SLsmg_gotorc(self->y + y, self->x + x);
 }
 
+static struct list_head *
+ui_browser__list_head_filter_entries(struct ui_browser *browser,
+				     struct list_head *pos)
+{
+	do {
+		if (!browser->filter || !browser->filter(browser, pos))
+			return pos;
+		pos = pos->next;
+	} while (pos != browser->entries);
+
+	return NULL;
+}
+
+static struct list_head *
+ui_browser__list_head_filter_prev_entries(struct ui_browser *browser,
+					  struct list_head *pos)
+{
+	do {
+		if (!browser->filter || !browser->filter(browser, pos))
+			return pos;
+		pos = pos->prev;
+	} while (pos != browser->entries);
+
+	return NULL;
+}
+
 void ui_browser__list_head_seek(struct ui_browser *self, off_t offset, int whence)
 {
 	struct list_head *head = self->entries;
 	struct list_head *pos;
 
+	if (self->nr_entries == 0)
+		return;
+
 	switch (whence) {
 	case SEEK_SET:
-		pos = head->next;
+		pos = ui_browser__list_head_filter_entries(self, head->next);
 		break;
 	case SEEK_CUR:
 		pos = self->top;
 		break;
 	case SEEK_END:
-		pos = head->prev;
+		pos = ui_browser__list_head_filter_prev_entries(self, head->prev);
 		break;
 	default:
 		return;
 	}
 
+	assert(pos != NULL);
+
 	if (offset > 0) {
 		while (offset-- != 0)
-			pos = pos->next;
+			pos = ui_browser__list_head_filter_entries(self, pos->next);
 	} else {
 		while (offset++ != 0)
-			pos = pos->prev;
+			pos = ui_browser__list_head_filter_prev_entries(self, pos->prev);
 	}
 
 	self->top = pos;
@@ -127,11 +162,8 @@ bool ui_browser__is_current_entry(struct ui_browser *self, unsigned row)
 
 void ui_browser__refresh_dimensions(struct ui_browser *self)
 {
-	int cols, rows;
-	newtGetScreenSize(&cols, &rows);
-
-	self->width = cols - 1;
-	self->height = rows - 2;
+	self->width = SLtt_Screen_Cols - 1;
+	self->height = SLtt_Screen_Rows - 2;
 	self->y = 1;
 	self->x = 0;
 }
@@ -142,26 +174,11 @@ void ui_browser__reset_index(struct ui_browser *self)
 	self->seek(self, 0, SEEK_SET);
 }
 
-void ui_browser__add_exit_key(struct ui_browser *self, int key)
-{
-	newtFormAddHotKey(self->form, key);
-}
-
-void ui_browser__add_exit_keys(struct ui_browser *self, int keys[])
-{
-	int i = 0;
-
-	while (keys[i] && i < 64) {
-		ui_browser__add_exit_key(self, keys[i]);
-		++i;
-	}
-}
-
 void __ui_browser__show_title(struct ui_browser *browser, const char *title)
 {
 	SLsmg_gotorc(0, 0);
 	ui_browser__set_color(browser, NEWT_COLORSET_ROOT);
-	slsmg_write_nstring(title, browser->width);
+	slsmg_write_nstring(title, browser->width + 1);
 }
 
 void ui_browser__show_title(struct ui_browser *browser, const char *title)
@@ -174,78 +191,189 @@ void ui_browser__show_title(struct ui_browser *browser, const char *title)
 int ui_browser__show(struct ui_browser *self, const char *title,
 		     const char *helpline, ...)
 {
+	int err;
 	va_list ap;
-	int keys[] = { NEWT_KEY_UP, NEWT_KEY_DOWN, NEWT_KEY_PGUP,
-		       NEWT_KEY_PGDN, NEWT_KEY_HOME, NEWT_KEY_END, ' ',
-		       NEWT_KEY_LEFT, NEWT_KEY_ESCAPE, 'q', CTRL('c'), 0 };
-
-	if (self->form != NULL)
-		newtFormDestroy(self->form);
 
 	ui_browser__refresh_dimensions(self);
-	self->form = newtForm(NULL, NULL, 0);
-	if (self->form == NULL)
-		return -1;
-
-	self->sb = newtVerticalScrollbar(self->width, 1, self->height,
-					 HE_COLORSET_NORMAL,
-					 HE_COLORSET_SELECTED);
-	if (self->sb == NULL)
-		return -1;
 
 	pthread_mutex_lock(&ui__lock);
 	__ui_browser__show_title(self, title);
 
-	ui_browser__add_exit_keys(self, keys);
-	newtFormAddComponent(self->form, self->sb);
+	self->title = title;
+	free(self->helpline);
+	self->helpline = NULL;
 
 	va_start(ap, helpline);
-	ui_helpline__vpush(helpline, ap);
+	err = vasprintf(&self->helpline, helpline, ap);
 	va_end(ap);
+	if (err > 0)
+		ui_helpline__push(self->helpline);
 	pthread_mutex_unlock(&ui__lock);
-	return 0;
+	return err ? 0 : -1;
 }
 
-void ui_browser__hide(struct ui_browser *self)
+void ui_browser__hide(struct ui_browser *browser __used)
 {
 	pthread_mutex_lock(&ui__lock);
-	newtFormDestroy(self->form);
-	self->form = NULL;
 	ui_helpline__pop();
 	pthread_mutex_unlock(&ui__lock);
 }
 
-int ui_browser__refresh(struct ui_browser *self)
+static void ui_browser__scrollbar_set(struct ui_browser *browser)
+{
+	int height = browser->height, h = 0, pct = 0,
+	    col = browser->width,
+	    row = browser->y - 1;
+
+	if (browser->nr_entries > 1) {
+		pct = ((browser->index * (browser->height - 1)) /
+		       (browser->nr_entries - 1));
+	}
+
+	while (h < height) {
+	        ui_browser__gotorc(browser, row++, col);
+		SLsmg_set_char_set(1);
+		SLsmg_write_char(h == pct ? SLSMG_DIAMOND_CHAR : SLSMG_BOARD_CHAR);
+		SLsmg_set_char_set(0);
+		++h;
+	}
+}
+
+static int __ui_browser__refresh(struct ui_browser *browser)
 {
 	int row;
+	int width = browser->width;
+
+	row = browser->refresh(browser);
+	ui_browser__set_color(browser, HE_COLORSET_NORMAL);
+
+	if (!browser->use_navkeypressed || browser->navkeypressed)
+		ui_browser__scrollbar_set(browser);
+	else
+		width += 1;
 
+	SLsmg_fill_region(browser->y + row, browser->x,
+			  browser->height - row, width, ' ');
+
+	return 0;
+}
+
+int ui_browser__refresh(struct ui_browser *browser)
+{
 	pthread_mutex_lock(&ui__lock);
-	newtScrollbarSet(self->sb, self->index, self->nr_entries - 1);
-	row = self->refresh(self);
-	ui_browser__set_color(self, HE_COLORSET_NORMAL);
-	SLsmg_fill_region(self->y + row, self->x,
-			  self->height - row, self->width, ' ');
+	__ui_browser__refresh(browser);
 	pthread_mutex_unlock(&ui__lock);
 
 	return 0;
 }
 
-int ui_browser__run(struct ui_browser *self)
+/*
+ * Here we're updating nr_entries _after_ we started browsing, i.e.  we have to
+ * forget about any reference to any entry in the underlying data structure,
+ * that is why we do a SEEK_SET. Think about 'perf top' in the hists browser
+ * after an output_resort and hist decay.
+ */
+void ui_browser__update_nr_entries(struct ui_browser *browser, u32 nr_entries)
 {
-	struct newtExitStruct es;
+	off_t offset = nr_entries - browser->nr_entries;
+
+	browser->nr_entries = nr_entries;
 
-	if (ui_browser__refresh(self) < 0)
-		return -1;
+	if (offset < 0) {
+		if (browser->top_idx < (u64)-offset)
+			offset = -browser->top_idx;
+
+		browser->index += offset;
+		browser->top_idx += offset;
+	}
+
+	browser->top = NULL;
+	browser->seek(browser, browser->top_idx, SEEK_SET);
+}
+
+static int ui__getch(int delay_secs)
+{
+	struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
+	fd_set read_set;
+	int err, key;
+
+	FD_ZERO(&read_set);
+	FD_SET(0, &read_set);
+
+	if (delay_secs) {
+		timeout.tv_sec = delay_secs;
+		timeout.tv_usec = 0;
+	}
+
+        err = select(1, &read_set, NULL, NULL, ptimeout);
+
+	if (err == 0)
+		return K_TIMER;
+
+	if (err == -1) {
+		if (errno == EINTR)
+			return K_RESIZE;
+		return K_ERROR;
+	}
+
+	key = SLang_getkey();
+	if (key != K_ESC)
+		return key;
+
+	FD_ZERO(&read_set);
+	FD_SET(0, &read_set);
+	timeout.tv_sec = 0;
+	timeout.tv_usec = 20;
+        err = select(1, &read_set, NULL, NULL, &timeout);
+	if (err == 0)
+		return K_ESC;
+
+	SLang_ungetkey(key);
+	return SLkp_getkey();
+}
+
+int ui_browser__run(struct ui_browser *self, int delay_secs)
+{
+	int err, key;
+
+	pthread__unblock_sigwinch();
 
 	while (1) {
 		off_t offset;
 
-		newtFormRun(self->form, &es);
-
-		if (es.reason != NEWT_EXIT_HOTKEY)
+		pthread_mutex_lock(&ui__lock);
+		err = __ui_browser__refresh(self);
+		SLsmg_refresh();
+		pthread_mutex_unlock(&ui__lock);
+		if (err < 0)
 			break;
-		switch (es.u.key) {
-		case NEWT_KEY_DOWN:
+
+		key = ui__getch(delay_secs);
+
+		if (key == K_RESIZE) {
+			pthread_mutex_lock(&ui__lock);
+			SLtt_get_screen_size();
+			SLsmg_reinit_smg();
+			pthread_mutex_unlock(&ui__lock);
+			ui_browser__refresh_dimensions(self);
+			__ui_browser__show_title(self, self->title);
+			ui_helpline__puts(self->helpline);
+			continue;
+		}
+
+		if (self->use_navkeypressed && !self->navkeypressed) {
+			if (key == K_DOWN || key == K_UP ||
+			    key == K_PGDN || key == K_PGUP ||
+			    key == K_HOME || key == K_END ||
+			    key == ' ') {
+				self->navkeypressed = true;
+				continue;
+			} else
+				return key;
+		}
+
+		switch (key) {
+		case K_DOWN:
 			if (self->index == self->nr_entries - 1)
 				break;
 			++self->index;
@@ -254,7 +382,7 @@ int ui_browser__run(struct ui_browser *self)
 				self->seek(self, +1, SEEK_CUR);
 			}
 			break;
-		case NEWT_KEY_UP:
+		case K_UP:
 			if (self->index == 0)
 				break;
 			--self->index;
@@ -263,7 +391,7 @@ int ui_browser__run(struct ui_browser *self)
 				self->seek(self, -1, SEEK_CUR);
 			}
 			break;
-		case NEWT_KEY_PGDN:
+		case K_PGDN:
 		case ' ':
 			if (self->top_idx + self->height > self->nr_entries - 1)
 				break;
@@ -275,7 +403,7 @@ int ui_browser__run(struct ui_browser *self)
 			self->top_idx += offset;
 			self->seek(self, +offset, SEEK_CUR);
 			break;
-		case NEWT_KEY_PGUP:
+		case K_PGUP:
 			if (self->top_idx == 0)
 				break;
 
@@ -288,10 +416,10 @@ int ui_browser__run(struct ui_browser *self)
 			self->top_idx -= offset;
 			self->seek(self, -offset, SEEK_CUR);
 			break;
-		case NEWT_KEY_HOME:
+		case K_HOME:
 			ui_browser__reset_index(self);
 			break;
-		case NEWT_KEY_END:
+		case K_END:
 			offset = self->height - 1;
 			if (offset >= self->nr_entries)
 				offset = self->nr_entries - 1;
@@ -301,10 +429,8 @@ int ui_browser__run(struct ui_browser *self)
 			self->seek(self, -offset, SEEK_END);
 			break;
 		default:
-			return es.u.key;
+			return key;
 		}
-		if (ui_browser__refresh(self) < 0)
-			return -1;
 	}
 	return -1;
 }
@@ -316,41 +442,105 @@ unsigned int ui_browser__list_head_refresh(struct ui_browser *self)
 	int row = 0;
 
 	if (self->top == NULL || self->top == self->entries)
-                self->top = head->next;
+                self->top = ui_browser__list_head_filter_entries(self, head->next);
 
 	pos = self->top;
 
 	list_for_each_from(pos, head) {
-		ui_browser__gotorc(self, row, 0);
-		self->write(self, pos, row);
-		if (++row == self->height)
-			break;
+		if (!self->filter || !self->filter(self, pos)) {
+			ui_browser__gotorc(self, row, 0);
+			self->write(self, pos, row);
+			if (++row == self->height)
+				break;
+		}
 	}
 
 	return row;
 }
 
-static struct newtPercentTreeColors {
-	const char *topColorFg, *topColorBg;
-	const char *mediumColorFg, *mediumColorBg;
-	const char *normalColorFg, *normalColorBg;
-	const char *selColorFg, *selColorBg;
-	const char *codeColorFg, *codeColorBg;
-} defaultPercentTreeColors = {
-	"red",       "lightgray",
-	"green",     "lightgray",
-	"black",     "lightgray",
-	"lightgray", "magenta",
-	"blue",	     "lightgray",
+static struct ui_browser__colorset {
+	const char *name, *fg, *bg;
+	int colorset;
+} ui_browser__colorsets[] = {
+	{
+		.colorset = HE_COLORSET_TOP,
+		.name	  = "top",
+		.fg	  = "red",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_MEDIUM,
+		.name	  = "medium",
+		.fg	  = "green",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_NORMAL,
+		.name	  = "normal",
+		.fg	  = "default",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_SELECTED,
+		.name	  = "selected",
+		.fg	  = "black",
+		.bg	  = "lightgray",
+	},
+	{
+		.colorset = HE_COLORSET_CODE,
+		.name	  = "code",
+		.fg	  = "blue",
+		.bg	  = "default",
+	},
+	{
+		.name = NULL,
+	}
 };
 
+
+static int ui_browser__color_config(const char *var, const char *value,
+				    void *data __used)
+{
+	char *fg = NULL, *bg;
+	int i;
+
+	/* same dir for all commands */
+	if (prefixcmp(var, "colors.") != 0)
+		return 0;
+
+	for (i = 0; ui_browser__colorsets[i].name != NULL; ++i) {
+		const char *name = var + 7;
+
+		if (strcmp(ui_browser__colorsets[i].name, name) != 0)
+			continue;
+
+		fg = strdup(value);
+		if (fg == NULL)
+			break;
+
+		bg = strchr(fg, ',');
+		if (bg == NULL)
+			break;
+
+		*bg = '\0';
+		while (isspace(*++bg));
+		ui_browser__colorsets[i].bg = bg;
+		ui_browser__colorsets[i].fg = fg;
+		return 0;
+	}
+
+	free(fg);
+	return -1;
+}
+
 void ui_browser__init(void)
 {
-	struct newtPercentTreeColors *c = &defaultPercentTreeColors;
+	int i = 0;
 
-	sltt_set_color(HE_COLORSET_TOP, NULL, c->topColorFg, c->topColorBg);
-	sltt_set_color(HE_COLORSET_MEDIUM, NULL, c->mediumColorFg, c->mediumColorBg);
-	sltt_set_color(HE_COLORSET_NORMAL, NULL, c->normalColorFg, c->normalColorBg);
-	sltt_set_color(HE_COLORSET_SELECTED, NULL, c->selColorFg, c->selColorBg);
-	sltt_set_color(HE_COLORSET_CODE, NULL, c->codeColorFg, c->codeColorBg);
+	perf_config(ui_browser__color_config, NULL);
+
+	while (ui_browser__colorsets[i].name) {
+		struct ui_browser__colorset *c = &ui_browser__colorsets[i++];
+		sltt_set_color(c->colorset, c->name, c->fg, c->bg);
+	}
 }
diff --git a/tools/perf/util/ui/browser.h b/tools/perf/util/ui/browser.h
index fc63dda..a2c707d 100644
--- a/tools/perf/util/ui/browser.h
+++ b/tools/perf/util/ui/browser.h
@@ -2,7 +2,6 @@
 #define _PERF_UI_BROWSER_H_ 1
 
 #include <stdbool.h>
-#include <newt.h>
 #include <sys/types.h>
 #include "../types.h"
 
@@ -13,15 +12,19 @@
 #define HE_COLORSET_CODE	54
 
 struct ui_browser {
-	newtComponent form, sb;
 	u64	      index, top_idx;
 	void	      *top, *entries;
 	u16	      y, x, width, height;
 	void	      *priv;
+	const char    *title;
+	char	      *helpline;
 	unsigned int  (*refresh)(struct ui_browser *self);
 	void	      (*write)(struct ui_browser *self, void *entry, int row);
 	void	      (*seek)(struct ui_browser *self, off_t offset, int whence);
+	bool	      (*filter)(struct ui_browser *self, void *entry);
 	u32	      nr_entries;
+	bool	      navkeypressed;
+	bool	      use_navkeypressed;
 };
 
 void ui_browser__set_color(struct ui_browser *self, int color);
@@ -32,15 +35,14 @@ void ui_browser__refresh_dimensions(struct ui_browser *self);
 void ui_browser__reset_index(struct ui_browser *self);
 
 void ui_browser__gotorc(struct ui_browser *self, int y, int x);
-void ui_browser__add_exit_key(struct ui_browser *self, int key);
-void ui_browser__add_exit_keys(struct ui_browser *self, int keys[]);
 void __ui_browser__show_title(struct ui_browser *browser, const char *title);
 void ui_browser__show_title(struct ui_browser *browser, const char *title);
 int ui_browser__show(struct ui_browser *self, const char *title,
 		     const char *helpline, ...);
 void ui_browser__hide(struct ui_browser *self);
 int ui_browser__refresh(struct ui_browser *self);
-int ui_browser__run(struct ui_browser *self);
+int ui_browser__run(struct ui_browser *browser, int delay_secs);
+void ui_browser__update_nr_entries(struct ui_browser *browser, u32 nr_entries);
 
 void ui_browser__rb_tree_seek(struct ui_browser *self, off_t offset, int whence);
 unsigned int ui_browser__rb_tree_refresh(struct ui_browser *self);
diff --git a/tools/perf/util/ui/browsers/annotate.c b/tools/perf/util/ui/browsers/annotate.c
index 0229723..4e0cb7fe 100644
--- a/tools/perf/util/ui/browsers/annotate.c
+++ b/tools/perf/util/ui/browsers/annotate.c
@@ -6,6 +6,7 @@
 #include "../../sort.h"
 #include "../../symbol.h"
 #include <pthread.h>
+#include <newt.h>
 
 static void ui__error_window(const char *fmt, ...)
 {
@@ -20,12 +21,17 @@ struct annotate_browser {
 	struct ui_browser b;
 	struct rb_root	  entries;
 	struct rb_node	  *curr_hot;
+	struct objdump_line *selection;
+	int		    nr_asm_entries;
+	int		    nr_entries;
+	bool		    hide_src_code;
 };
 
 struct objdump_line_rb_node {
 	struct rb_node	rb_node;
 	double		percent;
 	u32		idx;
+	int		idx_asm;
 };
 
 static inline
@@ -34,9 +40,22 @@ struct objdump_line_rb_node *objdump_line__rb(struct objdump_line *self)
 	return (struct objdump_line_rb_node *)(self + 1);
 }
 
+static bool objdump_line__filter(struct ui_browser *browser, void *entry)
+{
+	struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
+
+	if (ab->hide_src_code) {
+		struct objdump_line *ol = list_entry(entry, struct objdump_line, node);
+		return ol->offset == -1;
+	}
+
+	return false;
+}
+
 static void annotate_browser__write(struct ui_browser *self, void *entry, int row)
 {
-	struct objdump_line *ol = rb_entry(entry, struct objdump_line, node);
+	struct annotate_browser *ab = container_of(self, struct annotate_browser, b);
+	struct objdump_line *ol = list_entry(entry, struct objdump_line, node);
 	bool current_entry = ui_browser__is_current_entry(self, row);
 	int width = self->width;
 
@@ -51,6 +70,11 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
 
 	SLsmg_write_char(':');
 	slsmg_write_nstring(" ", 8);
+
+	/* The scroll bar isn't being used */
+	if (!self->navkeypressed)
+		width += 1;
+
 	if (!*ol->line)
 		slsmg_write_nstring(" ", width - 18);
 	else
@@ -58,6 +82,8 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
 
 	if (!current_entry)
 		ui_browser__set_color(self, HE_COLORSET_CODE);
+	else
+		ab->selection = ol;
 }
 
 static double objdump_line__calc_percent(struct objdump_line *self,
@@ -141,7 +167,8 @@ static void annotate_browser__set_top(struct annotate_browser *self,
 static void annotate_browser__calc_percent(struct annotate_browser *browser,
 					   int evidx)
 {
-	struct symbol *sym = browser->b.priv;
+	struct map_symbol *ms = browser->b.priv;
+	struct symbol *sym = ms->sym;
 	struct annotation *notes = symbol__annotation(sym);
 	struct objdump_line *pos;
 
@@ -163,25 +190,60 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
 	browser->curr_hot = rb_last(&browser->entries);
 }
 
+static bool annotate_browser__toggle_source(struct annotate_browser *browser)
+{
+	struct objdump_line *ol;
+	struct objdump_line_rb_node *olrb;
+	off_t offset = browser->b.index - browser->b.top_idx;
+
+	browser->b.seek(&browser->b, offset, SEEK_CUR);
+	ol = list_entry(browser->b.top, struct objdump_line, node);
+	olrb = objdump_line__rb(ol);
+
+	if (browser->hide_src_code) {
+		if (olrb->idx_asm < offset)
+			offset = olrb->idx;
+
+		browser->b.nr_entries = browser->nr_entries;
+		browser->hide_src_code = false;
+		browser->b.seek(&browser->b, -offset, SEEK_CUR);
+		browser->b.top_idx = olrb->idx - offset;
+		browser->b.index = olrb->idx;
+	} else {
+		if (olrb->idx_asm < 0) {
+			ui_helpline__puts("Only available for assembly lines.");
+			browser->b.seek(&browser->b, -offset, SEEK_CUR);
+			return false;
+		}
+
+		if (olrb->idx_asm < offset)
+			offset = olrb->idx_asm;
+
+		browser->b.nr_entries = browser->nr_asm_entries;
+		browser->hide_src_code = true;
+		browser->b.seek(&browser->b, -offset, SEEK_CUR);
+		browser->b.top_idx = olrb->idx_asm - offset;
+		browser->b.index = olrb->idx_asm;
+	}
+
+	return true;
+}
+
 static int annotate_browser__run(struct annotate_browser *self, int evidx,
-				 int refresh)
+				 int nr_events, void(*timer)(void *arg),
+				 void *arg, int delay_secs)
 {
 	struct rb_node *nd = NULL;
-	struct symbol *sym = self->b.priv;
-	/*
-	 * RIGHT To allow builtin-annotate to cycle thru multiple symbols by
-	 * examining the exit key for this function.
-	 */
-	int exit_keys[] = { 'H', NEWT_KEY_TAB, NEWT_KEY_UNTAB,
-			    NEWT_KEY_RIGHT, 0 };
+	struct map_symbol *ms = self->b.priv;
+	struct symbol *sym = ms->sym;
+	const char *help = "<-, ESC: exit, TAB/shift+TAB: cycle hottest lines, "
+			   "H: Hottest, -> Line action, S -> Toggle source "
+			   "code view";
 	int key;
 
-	if (ui_browser__show(&self->b, sym->name,
-			     "<-, -> or ESC: exit, TAB/shift+TAB: "
-			     "cycle hottest lines, H: Hottest") < 0)
+	if (ui_browser__show(&self->b, sym->name, help) < 0)
 		return -1;
 
-	ui_browser__add_exit_keys(&self->b, exit_keys);
 	annotate_browser__calc_percent(self, evidx);
 
 	if (self->curr_hot)
@@ -189,13 +251,10 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
 
 	nd = self->curr_hot;
 
-	if (refresh != 0)
-		newtFormSetTimer(self->b.form, refresh);
-
 	while (1) {
-		key = ui_browser__run(&self->b);
+		key = ui_browser__run(&self->b, delay_secs);
 
-		if (refresh != 0) {
+		if (delay_secs != 0) {
 			annotate_browser__calc_percent(self, evidx);
 			/*
 			 * Current line focus got out of the list of most active
@@ -207,15 +266,14 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
 		}
 
 		switch (key) {
-		case -1:
-			/*
- 			 * FIXME we need to check if it was
- 			 * es.reason == NEWT_EXIT_TIMER
- 			 */
-			if (refresh != 0)
+		case K_TIMER:
+			if (timer != NULL)
+				timer(arg);
+
+			if (delay_secs != 0)
 				symbol__annotate_decay_histogram(sym, evidx);
 			continue;
-		case NEWT_KEY_TAB:
+		case K_TAB:
 			if (nd != NULL) {
 				nd = rb_prev(nd);
 				if (nd == NULL)
@@ -223,7 +281,7 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
 			} else
 				nd = self->curr_hot;
 			break;
-		case NEWT_KEY_UNTAB:
+		case K_UNTAB:
 			if (nd != NULL)
 				nd = rb_next(nd);
 				if (nd == NULL)
@@ -234,8 +292,68 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
 		case 'H':
 			nd = self->curr_hot;
 			break;
-		default:
+		case 'S':
+			if (annotate_browser__toggle_source(self))
+				ui_helpline__puts(help);
+			continue;
+		case K_ENTER:
+		case K_RIGHT:
+			if (self->selection == NULL) {
+				ui_helpline__puts("Huh? No selection. Report to linux-kernel@vger.kernel.org");
+				continue;
+			}
+
+			if (self->selection->offset == -1) {
+				ui_helpline__puts("Actions are only available for assembly lines.");
+				continue;
+			} else {
+				char *s = strstr(self->selection->line, "callq ");
+				struct annotation *notes;
+				struct symbol *target;
+				u64 ip;
+
+				if (s == NULL) {
+					ui_helpline__puts("Actions are only available for the 'callq' instruction.");
+					continue;
+				}
+
+				s = strchr(s, ' ');
+				if (s++ == NULL) {
+					ui_helpline__puts("Invallid callq instruction.");
+					continue;
+				}
+
+				ip = strtoull(s, NULL, 16);
+				ip = ms->map->map_ip(ms->map, ip);
+				target = map__find_symbol(ms->map, ip, NULL);
+				if (target == NULL) {
+					ui_helpline__puts("The called function was not found.");
+					continue;
+				}
+
+				notes = symbol__annotation(target);
+				pthread_mutex_lock(&notes->lock);
+
+				if (notes->src == NULL &&
+				    symbol__alloc_hist(target, nr_events) < 0) {
+					pthread_mutex_unlock(&notes->lock);
+					ui__warning("Not enough memory for annotating '%s' symbol!\n",
+						    target->name);
+					continue;
+				}
+
+				pthread_mutex_unlock(&notes->lock);
+				symbol__tui_annotate(target, ms->map, evidx, nr_events,
+						     timer, arg, delay_secs);
+			}
+			continue;
+		case K_LEFT:
+		case K_ESC:
+		case 'q':
+		case CTRL('c'):
 			goto out;
+		default:
+			continue;
 		}
 
 		if (nd != NULL)
@@ -246,22 +364,31 @@ out:
 	return key;
 }
 
-int hist_entry__tui_annotate(struct hist_entry *he, int evidx)
+int hist_entry__tui_annotate(struct hist_entry *he, int evidx, int nr_events,
+			     void(*timer)(void *arg), void *arg, int delay_secs)
 {
-	return symbol__tui_annotate(he->ms.sym, he->ms.map, evidx, 0);
+	return symbol__tui_annotate(he->ms.sym, he->ms.map, evidx, nr_events,
+				    timer, arg, delay_secs);
 }
 
 int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
-			 int refresh)
+			 int nr_events, void(*timer)(void *arg), void *arg,
+			 int delay_secs)
 {
 	struct objdump_line *pos, *n;
 	struct annotation *notes;
+	struct map_symbol ms = {
+		.map = map,
+		.sym = sym,
+	};
 	struct annotate_browser browser = {
 		.b = {
 			.refresh = ui_browser__list_head_refresh,
 			.seek	 = ui_browser__list_head_seek,
 			.write	 = annotate_browser__write,
-			.priv	 = sym,
+			.filter  = objdump_line__filter,
+			.priv	 = &ms,
+			.use_navkeypressed = true,
 		},
 	};
 	int ret;
@@ -288,12 +415,18 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 		if (browser.b.width < line_len)
 			browser.b.width = line_len;
 		rbpos = objdump_line__rb(pos);
-		rbpos->idx = browser.b.nr_entries++;
+		rbpos->idx = browser.nr_entries++;
+		if (pos->offset != -1)
+			rbpos->idx_asm = browser.nr_asm_entries++;
+		else
+			rbpos->idx_asm = -1;
 	}
 
+	browser.b.nr_entries = browser.nr_entries;
 	browser.b.entries = &notes->src->source,
 	browser.b.width += 18; /* Percentage */
-	ret = annotate_browser__run(&browser, evidx, refresh);
+	ret = annotate_browser__run(&browser, evidx, nr_events,
+				    timer, arg, delay_secs);
 	list_for_each_entry_safe(pos, n, &notes->src->source, node) {
 		list_del(&pos->node);
 		objdump_line__free(pos);
diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c
index 5d767c6..4663dcb 100644
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -24,8 +24,12 @@ struct hist_browser {
 	struct hists	    *hists;
 	struct hist_entry   *he_selection;
 	struct map_symbol   *selection;
+	bool		     has_symbols;
 };
 
+static int hists__browser_title(struct hists *self, char *bf, size_t size,
+				const char *ev_name);
+
 static void hist_browser__refresh_dimensions(struct hist_browser *self)
 {
 	/* 3 == +/- toggle symbol before actual hist_entry rendering */
@@ -290,28 +294,34 @@ static void hist_browser__set_folding(struct hist_browser *self, bool unfold)
 	ui_browser__reset_index(&self->b);
 }
 
-static int hist_browser__run(struct hist_browser *self, const char *title)
+static int hist_browser__run(struct hist_browser *self, const char *ev_name,
+			     void(*timer)(void *arg), void *arg, int delay_secs)
 {
 	int key;
-	int exit_keys[] = { 'a', '?', 'h', 'C', 'd', 'D', 'E', 't',
-			    NEWT_KEY_ENTER, NEWT_KEY_RIGHT, NEWT_KEY_LEFT,
-			    NEWT_KEY_TAB, NEWT_KEY_UNTAB, 0, };
+	char title[160];
 
 	self->b.entries = &self->hists->entries;
 	self->b.nr_entries = self->hists->nr_entries;
 
 	hist_browser__refresh_dimensions(self);
+	hists__browser_title(self->hists, title, sizeof(title), ev_name);
 
 	if (ui_browser__show(&self->b, title,
 			     "Press '?' for help on key bindings") < 0)
 		return -1;
 
-	ui_browser__add_exit_keys(&self->b, exit_keys);
-
 	while (1) {
-		key = ui_browser__run(&self->b);
+		key = ui_browser__run(&self->b, delay_secs);
 
 		switch (key) {
+		case -1:
+			/* FIXME we need to check if it was es.reason == NEWT_EXIT_TIMER */
+			timer(arg);
+			ui_browser__update_nr_entries(&self->b, self->hists->nr_entries);
+			hists__browser_title(self->hists, title, sizeof(title),
+					     ev_name);
+			ui_browser__show_title(&self->b, title);
+			continue;
 		case 'D': { /* Debug */
 			static int seq;
 			struct hist_entry *h = rb_entry(self->b.top,
@@ -334,7 +344,7 @@ static int hist_browser__run(struct hist_browser *self, const char *title)
 			/* Expand the whole world. */
 			hist_browser__set_folding(self, true);
 			break;
-		case NEWT_KEY_ENTER:
+		case K_ENTER:
 			if (hist_browser__toggle_fold(self))
 				break;
 			/* fall thru */
@@ -532,7 +542,7 @@ static int hist_browser__show_entry(struct hist_browser *self,
 	char s[256];
 	double percent;
 	int printed = 0;
-	int color, width = self->b.width;
+	int width = self->b.width - 6; /* The percentage */
 	char folded_sign = ' ';
 	bool current_entry = ui_browser__is_current_entry(&self->b, row);
 	off_t row_offset = entry->row_offset;
@@ -548,26 +558,35 @@ static int hist_browser__show_entry(struct hist_browser *self,
 	}
 
 	if (row_offset == 0) {
-		hist_entry__snprintf(entry, s, sizeof(s), self->hists, NULL, false,
-				     0, false, self->hists->stats.total_period);
+		hist_entry__snprintf(entry, s, sizeof(s), self->hists);
 		percent = (entry->period * 100.0) / self->hists->stats.total_period;
 
-		color = HE_COLORSET_SELECTED;
-		if (!current_entry) {
-			if (percent >= MIN_RED)
-				color = HE_COLORSET_TOP;
-			else if (percent >= MIN_GREEN)
-				color = HE_COLORSET_MEDIUM;
-			else
-				color = HE_COLORSET_NORMAL;
-		}
-
-		ui_browser__set_color(&self->b, color);
+		ui_browser__set_percent_color(&self->b, percent, current_entry);
 		ui_browser__gotorc(&self->b, row, 0);
 		if (symbol_conf.use_callchain) {
 			slsmg_printf("%c ", folded_sign);
 			width -= 2;
 		}
+
+		slsmg_printf(" %5.2f%%", percent);
+
+		/* The scroll bar isn't being used */
+		if (!self->b.navkeypressed)
+			width += 1;
+
+		if (!current_entry || !self->b.navkeypressed)
+			ui_browser__set_color(&self->b, HE_COLORSET_NORMAL);
+
+		if (symbol_conf.show_nr_samples) {
+			slsmg_printf(" %11u", entry->nr_events);
+			width -= 12;
+		}
+
+		if (symbol_conf.show_total_period) {
+			slsmg_printf(" %12" PRIu64, entry->period);
+			width -= 13;
+		}
+
 		slsmg_write_nstring(s, width);
 		++row;
 		++printed;
@@ -585,14 +604,23 @@ static int hist_browser__show_entry(struct hist_browser *self,
 	return printed;
 }
 
+static void ui_browser__hists_init_top(struct ui_browser *browser)
+{
+	if (browser->top == NULL) {
+		struct hist_browser *hb;
+
+		hb = container_of(browser, struct hist_browser, b);
+		browser->top = rb_first(&hb->hists->entries);
+	}
+}
+
 static unsigned int hist_browser__refresh(struct ui_browser *self)
 {
 	unsigned row = 0;
 	struct rb_node *nd;
 	struct hist_browser *hb = container_of(self, struct hist_browser, b);
 
-	if (self->top == NULL)
-		self->top = rb_first(&hb->hists->entries);
+	ui_browser__hists_init_top(self);
 
 	for (nd = self->top; nd; nd = rb_next(nd)) {
 		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
@@ -644,6 +672,8 @@ static void ui_browser__hists_seek(struct ui_browser *self,
 	if (self->nr_entries == 0)
 		return;
 
+	ui_browser__hists_init_top(self);
+
 	switch (whence) {
 	case SEEK_SET:
 		nd = hists__filter_entries(rb_first(self->entries));
@@ -761,6 +791,8 @@ static struct hist_browser *hist_browser__new(struct hists *hists)
 		self->hists = hists;
 		self->b.refresh = hist_browser__refresh;
 		self->b.seek = ui_browser__hists_seek;
+		self->b.use_navkeypressed = true,
+		self->has_symbols = sort_sym.list.next != NULL;
 	}
 
 	return self;
@@ -782,11 +814,12 @@ static struct thread *hist_browser__selected_thread(struct hist_browser *self)
 }
 
 static int hists__browser_title(struct hists *self, char *bf, size_t size,
-				const char *ev_name, const struct dso *dso,
-				const struct thread *thread)
+				const char *ev_name)
 {
 	char unit;
 	int printed;
+	const struct dso *dso = self->dso_filter;
+	const struct thread *thread = self->thread_filter;
 	unsigned long nr_events = self->stats.nr_events[PERF_RECORD_SAMPLE];
 
 	nr_events = convert_unit(nr_events, &unit);
@@ -803,16 +836,15 @@ static int hists__browser_title(struct hists *self, char *bf, size_t size,
 	return printed;
 }
 
-static int perf_evsel__hists_browse(struct perf_evsel *evsel,
+static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 				    const char *helpline, const char *ev_name,
-				    bool left_exits)
+				    bool left_exits,
+				    void(*timer)(void *arg), void *arg,
+				    int delay_secs)
 {
 	struct hists *self = &evsel->hists;
 	struct hist_browser *browser = hist_browser__new(self);
 	struct pstack *fstack;
-	const struct thread *thread_filter = NULL;
-	const struct dso *dso_filter = NULL;
-	char msg[160];
 	int key = -1;
 
 	if (browser == NULL)
@@ -824,8 +856,6 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 
 	ui_helpline__push(helpline);
 
-	hists__browser_title(self, msg, sizeof(msg), ev_name,
-			     dso_filter, thread_filter);
 	while (1) {
 		const struct thread *thread = NULL;
 		const struct dso *dso = NULL;
@@ -834,7 +864,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 		    annotate = -2, zoom_dso = -2, zoom_thread = -2,
 		    browse_map = -2;
 
-		key = hist_browser__run(browser, msg);
+		key = hist_browser__run(browser, ev_name, timer, arg, delay_secs);
 
 		if (browser->he_selection != NULL) {
 			thread = hist_browser__selected_thread(browser);
@@ -842,14 +872,23 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 		}
 
 		switch (key) {
-		case NEWT_KEY_TAB:
-		case NEWT_KEY_UNTAB:
+		case K_TAB:
+		case K_UNTAB:
+			if (nr_events == 1)
+				continue;
 			/*
 			 * Exit the browser, let hists__browser_tree
 			 * go to the next or previous
 			 */
 			goto out_free_stack;
 		case 'a':
+			if (!browser->has_symbols) {
+				ui__warning(
+			"Annotation is only available for symbolic views, "
+			"include \"sym\" in --sort to use it.");
+				continue;
+			}
+
 			if (browser->selection == NULL ||
 			    browser->selection->sym == NULL ||
 			    browser->selection->map->dso->annotate_warned)
@@ -859,25 +898,29 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 			goto zoom_dso;
 		case 't':
 			goto zoom_thread;
-		case NEWT_KEY_F1:
+		case K_F1:
 		case 'h':
 		case '?':
-			ui__help_window("->        Zoom into DSO/Threads & Annotate current symbol\n"
-					"<-        Zoom out\n"
-					"a         Annotate current symbol\n"
-					"h/?/F1    Show this window\n"
-					"C         Collapse all callchains\n"
-					"E         Expand all callchains\n"
-					"d         Zoom into current DSO\n"
-					"t         Zoom into current Thread\n"
-					"TAB/UNTAB Switch events\n"
-					"q/CTRL+C  Exit browser");
+			ui__help_window("h/?/F1        Show this window\n"
+					"UP/DOWN/PGUP\n"
+					"PGDN/SPACE    Navigate\n"
+					"q/ESC/CTRL+C  Exit browser\n\n"
+					"For multiple event sessions:\n\n"
+					"TAB/UNTAB Switch events\n\n"
+					"For symbolic views (--sort has sym):\n\n"
+					"->            Zoom into DSO/Threads & Annotate current symbol\n"
+					"<-            Zoom out\n"
+					"a             Annotate current symbol\n"
+					"C             Collapse all callchains\n"
+					"E             Expand all callchains\n"
+					"d             Zoom into current DSO\n"
+					"t             Zoom into current Thread\n");
 			continue;
-		case NEWT_KEY_ENTER:
-		case NEWT_KEY_RIGHT:
+		case K_ENTER:
+		case K_RIGHT:
 			/* menu */
 			break;
-		case NEWT_KEY_LEFT: {
+		case K_LEFT: {
 			const void *top;
 
 			if (pstack__empty(fstack)) {
@@ -889,21 +932,27 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 				continue;
 			}
 			top = pstack__pop(fstack);
-			if (top == &dso_filter)
+			if (top == &browser->hists->dso_filter)
 				goto zoom_out_dso;
-			if (top == &thread_filter)
+			if (top == &browser->hists->thread_filter)
 				goto zoom_out_thread;
 			continue;
 		}
-		case NEWT_KEY_ESCAPE:
+		case K_ESC:
 			if (!left_exits &&
 			    !ui__dialog_yesno("Do you really want to exit?"))
 				continue;
 			/* Fall thru */
-		default:
+		case 'q':
+		case CTRL('c'):
 			goto out_free_stack;
+		default:
+			continue;
 		}
 
+		if (!browser->has_symbols)
+			goto add_exit_option;
+
 		if (browser->selection != NULL &&
 		    browser->selection->sym != NULL &&
 		    !browser->selection->map->dso->annotate_warned &&
@@ -913,14 +962,14 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 
 		if (thread != NULL &&
 		    asprintf(&options[nr_options], "Zoom %s %s(%d) thread",
-			     (thread_filter ? "out of" : "into"),
+			     (browser->hists->thread_filter ? "out of" : "into"),
 			     (thread->comm_set ? thread->comm : ""),
 			     thread->pid) > 0)
 			zoom_thread = nr_options++;
 
 		if (dso != NULL &&
 		    asprintf(&options[nr_options], "Zoom %s %s DSO",
-			     (dso_filter ? "out of" : "into"),
+			     (browser->hists->dso_filter ? "out of" : "into"),
 			     (dso->kernel ? "the Kernel" : dso->short_name)) > 0)
 			zoom_dso = nr_options++;
 
@@ -928,7 +977,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 		    browser->selection->map != NULL &&
 		    asprintf(&options[nr_options], "Browse map details") > 0)
 			browse_map = nr_options++;
-
+add_exit_option:
 		options[nr_options++] = (char *)"Exit";
 
 		choice = ui__popup_menu(nr_options, options);
@@ -948,46 +997,52 @@ do_annotate:
 			he = hist_browser__selected_entry(browser);
 			if (he == NULL)
 				continue;
-
-			hist_entry__tui_annotate(he, evsel->idx);
+			/*
+			 * Don't let this be freed, say, by hists__decay_entry.
+			 */
+			he->used = true;
+			hist_entry__tui_annotate(he, evsel->idx, nr_events,
+						 timer, arg, delay_secs);
+			he->used = false;
+			ui_browser__update_nr_entries(&browser->b, browser->hists->nr_entries);
 		} else if (choice == browse_map)
 			map__browse(browser->selection->map);
 		else if (choice == zoom_dso) {
 zoom_dso:
-			if (dso_filter) {
-				pstack__remove(fstack, &dso_filter);
+			if (browser->hists->dso_filter) {
+				pstack__remove(fstack, &browser->hists->dso_filter);
 zoom_out_dso:
 				ui_helpline__pop();
-				dso_filter = NULL;
+				browser->hists->dso_filter = NULL;
+				sort_dso.elide = false;
 			} else {
 				if (dso == NULL)
 					continue;
 				ui_helpline__fpush("To zoom out press <- or -> + \"Zoom out of %s DSO\"",
 						   dso->kernel ? "the Kernel" : dso->short_name);
-				dso_filter = dso;
-				pstack__push(fstack, &dso_filter);
+				browser->hists->dso_filter = dso;
+				sort_dso.elide = true;
+				pstack__push(fstack, &browser->hists->dso_filter);
 			}
-			hists__filter_by_dso(self, dso_filter);
-			hists__browser_title(self, msg, sizeof(msg), ev_name,
-					     dso_filter, thread_filter);
+			hists__filter_by_dso(self);
 			hist_browser__reset(browser);
 		} else if (choice == zoom_thread) {
 zoom_thread:
-			if (thread_filter) {
-				pstack__remove(fstack, &thread_filter);
+			if (browser->hists->thread_filter) {
+				pstack__remove(fstack, &browser->hists->thread_filter);
 zoom_out_thread:
 				ui_helpline__pop();
-				thread_filter = NULL;
+				browser->hists->thread_filter = NULL;
+				sort_thread.elide = false;
 			} else {
 				ui_helpline__fpush("To zoom out press <- or -> + \"Zoom out of %s(%d) thread\"",
 						   thread->comm_set ? thread->comm : "",
 						   thread->pid);
-				thread_filter = thread;
-				pstack__push(fstack, &thread_filter);
+				browser->hists->thread_filter = thread;
+				sort_thread.elide = true;
+				pstack__push(fstack, &browser->hists->thread_filter);
 			}
-			hists__filter_by_thread(self, thread_filter);
-			hists__browser_title(self, msg, sizeof(msg), ev_name,
-					     dso_filter, thread_filter);
+			hists__filter_by_thread(self);
 			hist_browser__reset(browser);
 		}
 	}
@@ -1026,9 +1081,10 @@ static void perf_evsel_menu__write(struct ui_browser *browser,
 		menu->selection = evsel;
 }
 
-static int perf_evsel_menu__run(struct perf_evsel_menu *menu, const char *help)
+static int perf_evsel_menu__run(struct perf_evsel_menu *menu,
+				int nr_events, const char *help,
+				void(*timer)(void *arg), void *arg, int delay_secs)
 {
-	int exit_keys[] = { NEWT_KEY_ENTER, NEWT_KEY_RIGHT, 0, };
 	struct perf_evlist *evlist = menu->b.priv;
 	struct perf_evsel *pos;
 	const char *ev_name, *title = "Available samples";
@@ -1038,50 +1094,65 @@ static int perf_evsel_menu__run(struct perf_evsel_menu *menu, const char *help)
 			     "ESC: exit, ENTER|->: Browse histograms") < 0)
 		return -1;
 
-	ui_browser__add_exit_keys(&menu->b, exit_keys);
-
 	while (1) {
-		key = ui_browser__run(&menu->b);
+		key = ui_browser__run(&menu->b, delay_secs);
 
 		switch (key) {
-		case NEWT_KEY_RIGHT:
-		case NEWT_KEY_ENTER:
+		case K_TIMER:
+			timer(arg);
+			continue;
+		case K_RIGHT:
+		case K_ENTER:
 			if (!menu->selection)
 				continue;
 			pos = menu->selection;
 browse_hists:
+			perf_evlist__set_selected(evlist, pos);
+			/*
+			 * Give the calling tool a chance to populate the non
+			 * default evsel resorted hists tree.
+			 */
+			if (timer)
+				timer(arg);
 			ev_name = event_name(pos);
-			key = perf_evsel__hists_browse(pos, help, ev_name, true);
+			key = perf_evsel__hists_browse(pos, nr_events, help,
+						       ev_name, true, timer,
+						       arg, delay_secs);
 			ui_browser__show_title(&menu->b, title);
-			break;
-		case NEWT_KEY_LEFT:
+			switch (key) {
+			case K_TAB:
+				if (pos->node.next == &evlist->entries)
+					pos = list_entry(evlist->entries.next, struct perf_evsel, node);
+				else
+					pos = list_entry(pos->node.next, struct perf_evsel, node);
+				goto browse_hists;
+			case K_UNTAB:
+				if (pos->node.prev == &evlist->entries)
+					pos = list_entry(evlist->entries.prev, struct perf_evsel, node);
+				else
+					pos = list_entry(pos->node.prev, struct perf_evsel, node);
+				goto browse_hists;
+			case K_ESC:
+				if (!ui__dialog_yesno("Do you really want to exit?"))
+					continue;
+				/* Fall thru */
+			case 'q':
+			case CTRL('c'):
+				goto out;
+			default:
+				continue;
+			}
+		case K_LEFT:
 			continue;
-		case NEWT_KEY_ESCAPE:
+		case K_ESC:
 			if (!ui__dialog_yesno("Do you really want to exit?"))
 				continue;
 			/* Fall thru */
-		default:
-			goto out;
-		}
-
-		switch (key) {
-		case NEWT_KEY_TAB:
-			if (pos->node.next == &evlist->entries)
-				pos = list_entry(evlist->entries.next, struct perf_evsel, node);
-			else
-				pos = list_entry(pos->node.next, struct perf_evsel, node);
-			goto browse_hists;
-		case NEWT_KEY_UNTAB:
-			if (pos->node.prev == &evlist->entries)
-				pos = list_entry(evlist->entries.prev, struct perf_evsel, node);
-			else
-				pos = list_entry(pos->node.prev, struct perf_evsel, node);
-			goto browse_hists;
 		case 'q':
 		case CTRL('c'):
 			goto out;
 		default:
-			break;
+			continue;
 		}
 	}
 
@@ -1091,7 +1162,9 @@ out:
 }
 
 static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
-					   const char *help)
+					   const char *help,
+					   void(*timer)(void *arg), void *arg,
+					   int delay_secs)
 {
 	struct perf_evsel *pos;
 	struct perf_evsel_menu menu = {
@@ -1121,18 +1194,24 @@ static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
 			pos->name = strdup(ev_name);
 	}
 
-	return perf_evsel_menu__run(&menu, help);
+	return perf_evsel_menu__run(&menu, evlist->nr_entries, help, timer,
+				    arg, delay_secs);
 }
 
-int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help)
+int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
+				  void(*timer)(void *arg), void *arg,
+				  int delay_secs)
 {
 
 	if (evlist->nr_entries == 1) {
 		struct perf_evsel *first = list_entry(evlist->entries.next,
 						      struct perf_evsel, node);
 		const char *ev_name = event_name(first);
-		return perf_evsel__hists_browse(first, help, ev_name, false);
+		return perf_evsel__hists_browse(first, evlist->nr_entries, help,
+						ev_name, false, timer, arg,
+						delay_secs);
 	}
 
-	return __perf_evlist__tui_browse_hists(evlist, help);
+	return __perf_evlist__tui_browse_hists(evlist, help,
+					       timer, arg, delay_secs);
 }
diff --git a/tools/perf/util/ui/browsers/map.c b/tools/perf/util/ui/browsers/map.c
index 8462bff..6905bcc 100644
--- a/tools/perf/util/ui/browsers/map.c
+++ b/tools/perf/util/ui/browsers/map.c
@@ -1,5 +1,6 @@
 #include "../libslang.h"
 #include <elf.h>
+#include <newt.h>
 #include <inttypes.h>
 #include <sys/ttydefaults.h>
 #include <ctype.h>
@@ -108,11 +109,8 @@ static int map_browser__run(struct map_browser *self)
 			     verbose ? "" : "restart with -v to use") < 0)
 		return -1;
 
-	if (verbose)
-		ui_browser__add_exit_key(&self->b, '/');
-
 	while (1) {
-		key = ui_browser__run(&self->b);
+		key = ui_browser__run(&self->b, 0);
 
 		if (verbose && key == '/')
 			map_browser__search(self);
diff --git a/tools/perf/util/ui/browsers/top.c b/tools/perf/util/ui/browsers/top.c
deleted file mode 100644
index 88403cf..0000000
--- a/tools/perf/util/ui/browsers/top.c
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
- *
- * Parts came from builtin-{top,stat,record}.c, see those files for further
- * copyright notes.
- *
- * Released under the GPL v2. (and only v2, not any later version)
- */
-#include "../browser.h"
-#include "../../annotate.h"
-#include "../helpline.h"
-#include "../libslang.h"
-#include "../util.h"
-#include "../../evlist.h"
-#include "../../hist.h"
-#include "../../sort.h"
-#include "../../symbol.h"
-#include "../../top.h"
-
-struct perf_top_browser {
-	struct ui_browser b;
-	struct rb_root	  root;
-	struct sym_entry  *selection;
-	float		  sum_ksamples;
-	int		  dso_width;
-	int		  dso_short_width;
-	int		  sym_width;
-};
-
-static void perf_top_browser__write(struct ui_browser *browser, void *entry, int row)
-{
-	struct perf_top_browser *top_browser = container_of(browser, struct perf_top_browser, b);
-	struct sym_entry *syme = rb_entry(entry, struct sym_entry, rb_node);
-	bool current_entry = ui_browser__is_current_entry(browser, row);
-	struct symbol *symbol = sym_entry__symbol(syme);
-	struct perf_top *top = browser->priv;
-	int width = browser->width;
-	double pcnt;
-
-	pcnt = 100.0 - (100.0 * ((top_browser->sum_ksamples - syme->snap_count) /
-				 top_browser->sum_ksamples));
-	ui_browser__set_percent_color(browser, pcnt, current_entry);
-
-	if (top->evlist->nr_entries == 1 || !top->display_weighted) {
-		slsmg_printf("%20.2f ", syme->weight);
-		width -= 24;
-	} else {
-		slsmg_printf("%9.1f %10ld ", syme->weight, syme->snap_count);
-		width -= 23;
-	}
-
-	slsmg_printf("%4.1f%%", pcnt);
-	width -= 7;
-
-	if (verbose) {
-		slsmg_printf(" %016" PRIx64, symbol->start);
-		width -= 17;
-	}
-
-	slsmg_printf(" %-*.*s ", top_browser->sym_width, top_browser->sym_width,
-		     symbol->name);
-	width -= top_browser->sym_width;
-	slsmg_write_nstring(width >= syme->map->dso->long_name_len ?
-				syme->map->dso->long_name :
-				syme->map->dso->short_name, width);
-
-	if (current_entry)
-		top_browser->selection = syme;
-}
-
-static void perf_top_browser__update_rb_tree(struct perf_top_browser *browser)
-{
-	struct perf_top *top = browser->b.priv;
-	u64 top_idx = browser->b.top_idx;
-
-	browser->root = RB_ROOT;
-	browser->b.top = NULL;
-	browser->sum_ksamples = perf_top__decay_samples(top, &browser->root);
-	/*
- 	 * No active symbols
- 	 */
-	if (top->rb_entries == 0)
-		return;
-
-	perf_top__find_widths(top, &browser->root, &browser->dso_width,
-			      &browser->dso_short_width,
-                              &browser->sym_width);
-	if (browser->sym_width + browser->dso_width > browser->b.width - 29) {
-		browser->dso_width = browser->dso_short_width;
-		if (browser->sym_width + browser->dso_width > browser->b.width - 29)
-			browser->sym_width = browser->b.width - browser->dso_width - 29;
-	}
-
-	/*
-	 * Adjust the ui_browser indexes since the entries in the browser->root
-	 * rb_tree may have changed, then seek it from start, so that we get a
-	 * possible new top of the screen.
- 	 */
-	browser->b.nr_entries = top->rb_entries;
-
-	if (top_idx >= browser->b.nr_entries) {
-		if (browser->b.height >= browser->b.nr_entries)
-			top_idx = browser->b.nr_entries - browser->b.height;
-		else
-			top_idx = 0;
-	}
-
-	if (browser->b.index >= top_idx + browser->b.height)
-		browser->b.index = top_idx + browser->b.index - browser->b.top_idx;
-
-	if (browser->b.index >= browser->b.nr_entries)
-		browser->b.index = browser->b.nr_entries - 1;
-
-	browser->b.top_idx = top_idx;
-	browser->b.seek(&browser->b, top_idx, SEEK_SET);
-}
-
-static void perf_top_browser__annotate(struct perf_top_browser *browser)
-{
-	struct sym_entry *syme = browser->selection;
-	struct symbol *sym = sym_entry__symbol(syme);
-	struct annotation *notes = symbol__annotation(sym);
-	struct perf_top *top = browser->b.priv;
-
-	if (notes->src != NULL)
-		goto do_annotation;
-
-	pthread_mutex_lock(&notes->lock);
-
-	top->sym_filter_entry = NULL;
-
-	if (symbol__alloc_hist(sym, top->evlist->nr_entries) < 0) {
-		pr_err("Not enough memory for annotating '%s' symbol!\n",
-		       sym->name);
-		pthread_mutex_unlock(&notes->lock);
-		return;
-	}
-
-	top->sym_filter_entry = syme;
-
-	pthread_mutex_unlock(&notes->lock);
-do_annotation:
-	symbol__tui_annotate(sym, syme->map, 0, top->delay_secs * 1000);
-}
-
-static int perf_top_browser__run(struct perf_top_browser *browser)
-{
-	int key;
-	char title[160];
-	struct perf_top *top = browser->b.priv;
-	int delay_msecs = top->delay_secs * 1000;
-	int exit_keys[] = { 'a', NEWT_KEY_ENTER, NEWT_KEY_RIGHT, 0, };
-
-	perf_top_browser__update_rb_tree(browser);
-        perf_top__header_snprintf(top, title, sizeof(title));
-        perf_top__reset_sample_counters(top);
-
-	if (ui_browser__show(&browser->b, title,
-			     "ESC: exit, ENTER|->|a: Live Annotate") < 0)
-		return -1;
-
-	newtFormSetTimer(browser->b.form, delay_msecs);
-	ui_browser__add_exit_keys(&browser->b, exit_keys);
-
-	while (1) {
-		key = ui_browser__run(&browser->b);
-
-		switch (key) {
-		case -1:
-			/* FIXME we need to check if it was es.reason == NEWT_EXIT_TIMER */
-			perf_top_browser__update_rb_tree(browser);
-			perf_top__header_snprintf(top, title, sizeof(title));
-			perf_top__reset_sample_counters(top);
-			ui_browser__set_color(&browser->b, NEWT_COLORSET_ROOT);
-			SLsmg_gotorc(0, 0);
-			slsmg_write_nstring(title, browser->b.width);
-			break;
-		case 'a':
-		case NEWT_KEY_RIGHT:
-		case NEWT_KEY_ENTER:
-			if (browser->selection)
-				perf_top_browser__annotate(browser);
-			break;
-		case NEWT_KEY_LEFT:
-			continue;
-		case NEWT_KEY_ESCAPE:
-			if (!ui__dialog_yesno("Do you really want to exit?"))
-				continue;
-			/* Fall thru */
-		default:
-			goto out;
-		}
-	}
-out:
-	ui_browser__hide(&browser->b);
-	return key;
-}
-
-int perf_top__tui_browser(struct perf_top *top)
-{
-	struct perf_top_browser browser = {
-		.b = {
-			.entries = &browser.root,
-			.refresh = ui_browser__rb_tree_refresh,
-			.seek	 = ui_browser__rb_tree_seek,
-			.write	 = perf_top_browser__write,
-			.priv	 = top,
-		},
-	};
-
-	return perf_top_browser__run(&browser);
-}
diff --git a/tools/perf/util/ui/helpline.h b/tools/perf/util/ui/helpline.h
index ab6028d..fdcbc02 100644
--- a/tools/perf/util/ui/helpline.h
+++ b/tools/perf/util/ui/helpline.h
@@ -1,6 +1,9 @@
 #ifndef _PERF_UI_HELPLINE_H_
 #define _PERF_UI_HELPLINE_H_ 1
 
+#include <stdio.h>
+#include <stdarg.h>
+
 void ui_helpline__init(void);
 void ui_helpline__pop(void);
 void ui_helpline__push(const char *msg);
diff --git a/tools/perf/util/ui/keysyms.h b/tools/perf/util/ui/keysyms.h
new file mode 100644
index 0000000..3458b19
--- /dev/null
+++ b/tools/perf/util/ui/keysyms.h
@@ -0,0 +1,25 @@
+#ifndef _PERF_KEYSYMS_H_
+#define _PERF_KEYSYMS_H_ 1
+
+#include "libslang.h"
+
+#define K_DOWN	SL_KEY_DOWN
+#define K_END	SL_KEY_END
+#define K_ENTER	'\r'
+#define K_ESC	033
+#define K_F1	SL_KEY_F(1)
+#define K_HOME	SL_KEY_HOME
+#define K_LEFT	SL_KEY_LEFT
+#define K_PGDN	SL_KEY_NPAGE
+#define K_PGUP	SL_KEY_PPAGE
+#define K_RIGHT	SL_KEY_RIGHT
+#define K_TAB	'\t'
+#define K_UNTAB	SL_KEY_UNTAB
+#define K_UP	SL_KEY_UP
+
+/* Not really keys */
+#define K_TIMER	 -1
+#define K_ERROR	 -2
+#define K_RESIZE -3
+
+#endif /* _PERF_KEYSYMS_H_ */
diff --git a/tools/perf/util/ui/libslang.h b/tools/perf/util/ui/libslang.h
index 2b63e1c..4d54b64 100644
--- a/tools/perf/util/ui/libslang.h
+++ b/tools/perf/util/ui/libslang.h
@@ -24,4 +24,6 @@
 #define sltt_set_color SLtt_set_color
 #endif
 
+#define SL_KEY_UNTAB 0x1000
+
 #endif /* _PERF_UI_SLANG_H_ */
diff --git a/tools/perf/util/ui/setup.c b/tools/perf/util/ui/setup.c
index ee46d67..1e6ba06 100644
--- a/tools/perf/util/ui/setup.c
+++ b/tools/perf/util/ui/setup.c
@@ -7,6 +7,7 @@
 #include "browser.h"
 #include "helpline.h"
 #include "ui.h"
+#include "libslang.h"
 
 pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
 
@@ -17,6 +18,33 @@ static void newt_suspend(void *d __used)
 	newtResume();
 }
 
+static int ui__init(void)
+{
+	int err = SLkp_init();
+
+	if (err < 0)
+		goto out;
+
+	SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
+out:
+	return err;
+}
+
+static void ui__exit(void)
+{
+	SLtt_set_cursor_visibility(1);
+	SLsmg_refresh();
+	SLsmg_reset_smg();
+	SLang_reset_tty();
+}
+
+static void ui__signal(int sig)
+{
+	ui__exit();
+	psignal(sig, "perf");
+	exit(0);
+}
+
 void setup_browser(bool fallback_to_pager)
 {
 	if (!isatty(1) || !use_browser || dump_trace) {
@@ -28,10 +56,16 @@ void setup_browser(bool fallback_to_pager)
 
 	use_browser = 1;
 	newtInit();
-	newtCls();
+	ui__init();
 	newtSetSuspendCallback(newt_suspend, NULL);
 	ui_helpline__init();
 	ui_browser__init();
+
+	signal(SIGSEGV, ui__signal);
+	signal(SIGFPE, ui__signal);
+	signal(SIGINT, ui__signal);
+	signal(SIGQUIT, ui__signal);
+	signal(SIGTERM, ui__signal);
 }
 
 void exit_browser(bool wait_for_ok)
@@ -41,6 +75,6 @@ void exit_browser(bool wait_for_ok)
 			char title[] = "Fatal Error", ok[] = "Ok";
 			newtWinMessage(title, ok, ui_helpline__last_msg);
 		}
-		newtFinished();
+		ui__exit();
 	}
 }