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perf stat: Fix zero total printouts

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Before:

           0  sched:sched_switch #        nan M/sec

After:

           0  sched:sched_switch #      0.000 M/sec

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-09-22 14:53:51 +02:00
parent a8f90e9067
commit c7f7fea30b
1 changed files with 14 additions and 4 deletions
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18
tools/perf/builtin-stat.c
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@ -338,14 +338,24 @@ static void nsec_printout(int counter, double avg)
static void abs_printout(int counter, double avg)
{
double total, ratio = 0.0;
fprintf(stderr, " %14.0f %-24s", avg, event_name(counter));
if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) {
fprintf(stderr, " # %10.3f IPC ",
avg / avg_stats(&runtime_cycles_stats));
total = avg_stats(&runtime_cycles_stats);
if (total)
ratio = avg / total;
fprintf(stderr, " # %10.3f IPC ", ratio);
} else {
fprintf(stderr, " # %10.3f M/sec",
1000.0 * avg / avg_stats(&runtime_nsecs_stats));
total = avg_stats(&runtime_nsecs_stats);
if (total)
ratio = 1000.0 * avg / total;
fprintf(stderr, " # %10.3f M/sec", ratio);
}
}