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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
This commit is contained in:
Ingo Molnar 2011-04-24 15:05:10 +02:00
parent 5c543e3c44
commit 11ba2b85f5
1 changed files with 9 additions and 2 deletions
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11
tools/perf/builtin-stat.c
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@ -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);
}
}