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| author | Ingo Molnar <mingo@elte.hu> | 2011-04-24 15:05:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-04-26 20:04:54 +0200 |
| commit | 11ba2b85f506306c8dfc9fe144aa4ddc43242855 (patch) | |
| tree | 1fb26d4345b53300b29bb7044c165dd1a8230c73 /tools/perf | |
| parent | 5c543e3c442d6382db127152c7096ca6a55283de (diff) | |
| download | kernel_samsung_tuna-11ba2b85f506306c8dfc9fe144aa4ddc43242855.zip kernel_samsung_tuna-11ba2b85f506306c8dfc9fe144aa4ddc43242855.tar.gz kernel_samsung_tuna-11ba2b85f506306c8dfc9fe144aa4ddc43242855.tar.bz2 | |
perf stat: Print stalled cycles percentage
Print:
611,527 cycles
400,553 instructions # ( 0.71 instructions per cycle )
77,809 stalled-cycles # ( 12.71% of all cycles )
0.000610987 seconds time elapsed
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Link: http://lkml.kernel.org/n/tip-fd6x8r1cpyb6zhlrc4ix8m45@git.kernel.org
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-stat.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 03f0e45..3a29041 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -442,7 +442,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) if (total) ratio = avg / total; - fprintf(stderr, " # %10.3f IPC ", ratio); + fprintf(stderr, " # ( %4.2f instructions per cycle )", ratio); } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) && runtime_branches_stats[cpu].n != 0) { total = avg_stats(&runtime_branches_stats[cpu]); @@ -450,7 +450,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) if (total) ratio = avg * 100 / total; - fprintf(stderr, " # %10.3f %% ", ratio); + fprintf(stderr, " # %10.3f %%", ratio); } else if (runtime_nsecs_stats[cpu].n != 0) { total = avg_stats(&runtime_nsecs_stats[cpu]); @@ -459,6 +459,13 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) ratio = 1000.0 * avg / total; fprintf(stderr, " # %10.3f M/sec", ratio); + } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES)) { + total = avg_stats(&runtime_cycles_stats[cpu]); + + if (total) + ratio = avg / total * 100.0; + + fprintf(stderr, " # (%5.2f%% of all cycles )", ratio); } } |