From 11ba2b85f506306c8dfc9fe144aa4ddc43242855 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sun, 24 Apr 2011 15:05:10 +0200 Subject: [PATCH] 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 Acked-by: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker Signed-off-by: Ingo Molnar Link: http://lkml.kernel.org/n/tip-fd6x8r1cpyb6zhlrc4ix8m45@git.kernel.org --- tools/perf/builtin-stat.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 03f0e45f1479..3a29041f8575 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); } } -- 2.20.1