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perf stat: Fix multi-run stats

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In multi-run (-r/--repeat) printouts, print out the noise of
the wall-clock average as well.

Also, fix a bug in printing out scaled counters: if it was not
scaled then we should not update the average with -1.

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>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2009-06-27 06:24:32 +02:00
parent 0cfb7a13b8
commit 566747e629
1 changed files with 11 additions and 4 deletions
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15
tools/perf/builtin-stat.c
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@@ -353,8 +353,11 @@ static void calc_avg(void)
event_res_avg[j]+1, event_res[i][j]+1); event_res_avg[j]+1, event_res[i][j]+1);
update_avg("counter/2", j, update_avg("counter/2", j,
event_res_avg[j]+2, event_res[i][j]+2); event_res_avg[j]+2, event_res[i][j]+2);
update_avg("scaled", j, if (event_scaled[i][j] != -1)
event_scaled_avg + j, event_scaled[i]+j); update_avg("scaled", j,
event_scaled_avg + j, event_scaled[i]+j);
else
event_scaled_avg[j] = -1;
} }
} }
runtime_nsecs_avg /= run_count; runtime_nsecs_avg /= run_count;
@@ -420,9 +423,13 @@ static void print_stat(int argc, const char **argv)
fprintf(stderr, "\n"); fprintf(stderr, "\n");
fprintf(stderr, " %14.9f seconds time elapsed.\n", fprintf(stderr, " %14.9f seconds time elapsed",
(double)walltime_nsecs_avg/1e9); (double)walltime_nsecs_avg/1e9);
fprintf(stderr, "\n"); if (run_count > 1) {
fprintf(stderr, " ( +- %7.3f%% )",
100.0*(double)walltime_nsecs_noise/(double)walltime_nsecs_avg);
}
fprintf(stderr, "\n\n");
} }
static volatile int signr = -1; static volatile int signr = -1;