Commit 3e7a0817 authored by Ramkumar Ramachandra's avatar Ramkumar Ramachandra Committed by Arnaldo Carvalho de Melo

perf stat: Don't print bogus data on -e instructions

When only the instructions event is requested:

$ perf stat -e instructions git s
M  builtin-stat.c

 Performance counter stats for 'git s':

       917,453,420 instructions              #    0.00  insns per cycle

       0.213002926 seconds time elapsed

The 0.00 insns per cycle comment in the output is totally bogus and
misleading. It happens because update_shadow_stats() doesn't touch
runtime_cycles_stats when only the instructions event is requested. So,
omit printing the bogus data altogether.
Signed-off-by: default avatarRamkumar Ramachandra <artagnon@gmail.com>
Acked-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1380616604-4077-1-git-send-email-artagnon@gmail.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent c458fe62
...@@ -930,11 +930,10 @@ static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg) ...@@ -930,11 +930,10 @@ static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) { if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
total = avg_stats(&runtime_cycles_stats[cpu]); total = avg_stats(&runtime_cycles_stats[cpu]);
if (total) if (total) {
ratio = avg / total; ratio = avg / total;
fprintf(output, " # %5.2f insns per cycle ", ratio);
fprintf(output, " # %5.2f insns per cycle ", ratio); }
total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]); total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu])); total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
......
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