Commit-ID: daf4f4786e8af371048e72cb37ac05190e89198a
Gitweb: http://git.kernel.org/tip/daf4f4786e8af371048e72cb37ac05190e89198a
Author: Namhyung Kim <namhy...@kernel.org>
AuthorDate: Fri, 13 May 2016 15:01:02 +0900
Committer: Arnaldo Carvalho de Melo <a...@redhat.com>
CommitDate: Mon, 16 May 2016 23:11:46 -0300
perf stat: Update runtime using cpu-clock event
Currently only the task-clock event updates the runtime_nsec so it
cannot show the metric when using cpu-clock events. However cpu clock
works basically same as task-clock, so no need to not update the runtime
IMHO.
Before:
# perf stat -a -e cpu-clock,context-switches,page-faults,cycles sleep 0.1
Performance counter stats for 'system wide':
1217.759506 cpu-clock (msec)
93 context-switches
61 page-faults
18,958,022 cycles
0.101393794 seconds time elapsed
After:
Performance counter stats for 'system wide':
1220.471884 cpu-clock (msec) # 12.013 CPUs utilized
118 context-switches # 0.097 K/sec
59 page-faults # 0.048 K/sec
17,941,247 cycles # 0.015 GHz
0.101594777 seconds time elapsed
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Andi Kleen <a...@firstfloor.org>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Link:
http://lkml.kernel.org/r/1463119263-5569-2-git-send-email-namhy...@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
tools/perf/util/stat-shadow.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 61200fc..aa9efe0 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -94,7 +94,8 @@ void perf_stat__update_shadow_stats(struct perf_evsel
*counter, u64 *count,
{
int ctx = evsel_context(counter);
- if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
+ if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK) ||
+ perf_evsel__match(counter, SOFTWARE, SW_CPU_CLOCK))
update_stats(&runtime_nsecs_stats[cpu], count[0]);
else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
update_stats(&runtime_cycles_stats[ctx][cpu], count[0]);
@@ -444,7 +445,8 @@ void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
ratio = total / avg;
print_metric(ctxp, NULL, "%8.0f", "cycles / elision", ratio);
- } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) {
+ } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK) ||
+ perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK)) {
if ((ratio = avg_stats(&walltime_nsecs_stats)) != 0)
print_metric(ctxp, NULL, "%8.3f", "CPUs utilized",
avg / ratio);
