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authorLinus Torvalds <torvalds@linux-foundation.org>2009-08-19 09:43:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-08-19 09:43:19 -0700
commitd46c7d9ab8289f23a5e161060b84fd7e63de7921 (patch)
tree347f049f3c3c9dcd0c8e9edd459d7d6b9bbacfaf
parentc124891f50f11e33acdfa276864ea089bab726b6 (diff)
parentb395cd8a74b4a8d943dd4b5585e676f62f7350b3 (diff)
downloadop-kernel-dev-d46c7d9ab8289f23a5e161060b84fd7e63de7921.zip
op-kernel-dev-d46c7d9ab8289f23a5e161060b84fd7e63de7921.tar.gz
Merge branch 'perfcounters-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perfcounters-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf tools: Make 'make html' work perf annotate: Fix segmentation fault perf_counter: Fix the PARISC build perf_counter: Check task on counter read IPI perf: Rename perf-examples.txt to examples.txt perf record: Fix typo in pid_synthesize_comm_event
-rw-r--r--kernel/perf_counter.c15
-rw-r--r--tools/perf/Documentation/Makefile2
-rw-r--r--tools/perf/Documentation/examples.txt (renamed from tools/perf/Documentation/perf-examples.txt)0
-rw-r--r--tools/perf/builtin-annotate.c7
-rw-r--r--tools/perf/builtin-record.c2
5 files changed, 24 insertions, 2 deletions
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 534e20d..36f65e2 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1503,10 +1503,21 @@ static void perf_counter_enable_on_exec(struct task_struct *task)
*/
static void __perf_counter_read(void *info)
{
+ struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
struct perf_counter *counter = info;
struct perf_counter_context *ctx = counter->ctx;
unsigned long flags;
+ /*
+ * If this is a task context, we need to check whether it is
+ * the current task context of this cpu. If not it has been
+ * scheduled out before the smp call arrived. In that case
+ * counter->count would have been updated to a recent sample
+ * when the counter was scheduled out.
+ */
+ if (ctx->task && cpuctx->task_ctx != ctx)
+ return;
+
local_irq_save(flags);
if (ctx->is_active)
update_context_time(ctx);
@@ -2008,6 +2019,10 @@ int perf_counter_task_disable(void)
return 0;
}
+#ifndef PERF_COUNTER_INDEX_OFFSET
+# define PERF_COUNTER_INDEX_OFFSET 0
+#endif
+
static int perf_counter_index(struct perf_counter *counter)
{
if (counter->state != PERF_COUNTER_STATE_ACTIVE)
diff --git a/tools/perf/Documentation/Makefile b/tools/perf/Documentation/Makefile
index 5457192..bdd3b7e 100644
--- a/tools/perf/Documentation/Makefile
+++ b/tools/perf/Documentation/Makefile
@@ -35,7 +35,7 @@ man7dir=$(mandir)/man7
# DESTDIR=
ASCIIDOC=asciidoc
-ASCIIDOC_EXTRA =
+ASCIIDOC_EXTRA = --unsafe
MANPAGE_XSL = manpage-normal.xsl
XMLTO_EXTRA =
INSTALL?=install
diff --git a/tools/perf/Documentation/perf-examples.txt b/tools/perf/Documentation/examples.txt
index 8eb6c48..8eb6c48 100644
--- a/tools/perf/Documentation/perf-examples.txt
+++ b/tools/perf/Documentation/examples.txt
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 1dba568..343e7b1 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -980,6 +980,13 @@ process_fork_event(event_t *event, unsigned long offset, unsigned long head)
(void *)(long)(event->header.size),
event->fork.pid, event->fork.ppid);
+ /*
+ * A thread clone will have the same PID for both
+ * parent and child.
+ */
+ if (thread == parent)
+ return 0;
+
if (!thread || !parent || thread__fork(thread, parent)) {
dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
return -1;
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 3d051b9..89a5ddc 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -219,7 +219,7 @@ static pid_t pid_synthesize_comm_event(pid_t pid, int full)
snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
fp = fopen(filename, "r");
- if (fd == NULL) {
+ if (fp == NULL) {
/*
* We raced with a task exiting - just return:
*/
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