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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-05-25 16:38:11 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-05-25 16:38:11 -0300
commitc410431cefefd766266139ed56bca21668e4f9a7 (patch)
treefe4ad29c08a3cf8fb1d8e754489fbe857e1dc79f
parent895d97663c83f8ed7a3386e912009155524fe7dd (diff)
downloadop-kernel-dev-c410431cefefd766266139ed56bca21668e4f9a7.zip
op-kernel-dev-c410431cefefd766266139ed56bca21668e4f9a7.tar.gz
perf tools: Reconstruct event with modifiers from perf_event_attr
The modifiers: k kernel space u user space h hypervisor G guest H host p, pp, ppp precision level (PEBS) that can be suffixed to an event were lost when tools used event_name() to reconstruct them from the perf_event_attr entries in a perf.data file. Fix it by following the defaults used for these modifiers in the current codebase, so: $ perf record -e instructions:u usleep 1 2> /dev/null $ perf evlist instructions:u $ perf record -e cycles:k usleep 1 2> /dev/null $ perf evlist cycles:k $ perf record -e cycles:kh usleep 1 2> /dev/null $ perf evlist cycles:kh $ perf record -e cache-misses:G usleep 1 2> /dev/null $ perf evlist cache-misses:G $ perf record -e cycles:ppk usleep 1 2> /dev/null $ perf evlist cycles:kpp $ Also works with 'top', 'report', etc. More work needed to cover tracepoints and software events while not dragging lots of baggage to the python binding, this is a minimal fix for v3.5. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-4hl5glle0hxlklw4usva1mkt@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/evsel.c90
-rw-r--r--tools/perf/util/evsel.h3
-rw-r--r--tools/perf/util/parse-events.c27
3 files changed, 104 insertions, 16 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 57e4ce5..91d1913 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -15,6 +15,7 @@
#include "cpumap.h"
#include "thread_map.h"
#include "target.h"
+#include "../../include/linux/perf_event.h"
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
#define GROUP_FD(group_fd, cpu) (*(int *)xyarray__entry(group_fd, cpu, 0))
@@ -64,6 +65,95 @@ struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
return evsel;
}
+static const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
+ "cycles",
+ "instructions",
+ "cache-references",
+ "cache-misses",
+ "branches",
+ "branch-misses",
+ "bus-cycles",
+ "stalled-cycles-frontend",
+ "stalled-cycles-backend",
+ "ref-cycles",
+};
+
+const char *__perf_evsel__hw_name(u64 config)
+{
+ if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
+ return perf_evsel__hw_names[config];
+
+ return "unknown-hardware";
+}
+
+static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
+{
+ int colon = 0;
+ struct perf_event_attr *attr = &evsel->attr;
+ int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(attr->config));
+ bool exclude_guest_default = false;
+
+#define MOD_PRINT(context, mod) do { \
+ if (!attr->exclude_##context) { \
+ if (!colon) colon = r++; \
+ r += scnprintf(bf + r, size - r, "%c", mod); \
+ } } while(0)
+
+ if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
+ MOD_PRINT(kernel, 'k');
+ MOD_PRINT(user, 'u');
+ MOD_PRINT(hv, 'h');
+ exclude_guest_default = true;
+ }
+
+ if (attr->precise_ip) {
+ if (!colon)
+ colon = r++;
+ r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
+ exclude_guest_default = true;
+ }
+
+ if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
+ MOD_PRINT(host, 'H');
+ MOD_PRINT(guest, 'G');
+ }
+#undef MOD_PRINT
+ if (colon)
+ bf[colon] = ':';
+ return r;
+}
+
+int perf_evsel__name(struct perf_evsel *evsel, char *bf, size_t size)
+{
+ int ret;
+
+ switch (evsel->attr.type) {
+ case PERF_TYPE_RAW:
+ ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
+ break;
+
+ case PERF_TYPE_HARDWARE:
+ ret = perf_evsel__hw_name(evsel, bf, size);
+ break;
+ default:
+ /*
+ * FIXME
+ *
+ * This is the minimal perf_evsel__name so that we can
+ * reconstruct event names taking into account event modifiers.
+ *
+ * The old event_name uses it now for raw anr hw events, so that
+ * we don't drag all the parsing stuff into the python binding.
+ *
+ * On the next devel cycle the rest of the event naming will be
+ * brought here.
+ */
+ return 0;
+ }
+
+ return ret;
+}
+
void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts,
struct perf_evsel *first)
{
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 3d6b3e4..4ba8b56 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -83,6 +83,9 @@ void perf_evsel__config(struct perf_evsel *evsel,
struct perf_record_opts *opts,
struct perf_evsel *first);
+const char* __perf_evsel__hw_name(u64 config);
+int perf_evsel__name(struct perf_evsel *evsel, char *bf, size_t size);
+
int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index fac7d59..05dbc8b 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -62,19 +62,6 @@ static struct event_symbol event_symbols[] = {
#define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
#define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
-static const char *hw_event_names[PERF_COUNT_HW_MAX] = {
- "cycles",
- "instructions",
- "cache-references",
- "cache-misses",
- "branches",
- "branch-misses",
- "bus-cycles",
- "stalled-cycles-frontend",
- "stalled-cycles-backend",
- "ref-cycles",
-};
-
static const char *sw_event_names[PERF_COUNT_SW_MAX] = {
"cpu-clock",
"task-clock",
@@ -300,6 +287,16 @@ const char *event_name(struct perf_evsel *evsel)
u64 config = evsel->attr.config;
int type = evsel->attr.type;
+ if (type == PERF_TYPE_RAW || type == PERF_TYPE_HARDWARE) {
+ /*
+ * XXX minimal fix, see comment on perf_evsen__name, this static buffer
+ * will go away together with event_name in the next devel cycle.
+ */
+ static char bf[128];
+ perf_evsel__name(evsel, bf, sizeof(bf));
+ return bf;
+ }
+
if (evsel->name)
return evsel->name;
@@ -317,9 +314,7 @@ const char *__event_name(int type, u64 config)
switch (type) {
case PERF_TYPE_HARDWARE:
- if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
- return hw_event_names[config];
- return "unknown-hardware";
+ return __perf_evsel__hw_name(config);
case PERF_TYPE_HW_CACHE: {
u8 cache_type, cache_op, cache_result;
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