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
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 @@
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 @@
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 @@
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);
}
}