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authorIngo Molnar <mingo@elte.hu>2009-06-27 06:24:32 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-27 06:34:37 +0200
commit566747e6298289c5cb02d4939cb3abf1c4fe7e5a (patch)
tree5762ec2d18b2ec3d7c727ac683d95cb3ca54dc21 /tools/perf
parent0cfb7a13b8e4e0afd4b856156ab16a182de7505b (diff)
perf stat: Fix multi-run stats
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>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/builtin-stat.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index cdcd058fac0..52c176cc683 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -353,8 +353,11 @@ static void calc_avg(void)
event_res_avg[j]+1, event_res[i][j]+1);
update_avg("counter/2", j,
event_res_avg[j]+2, event_res[i][j]+2);
- update_avg("scaled", j,
- event_scaled_avg + j, event_scaled[i]+j);
+ if (event_scaled[i][j] != -1)
+ update_avg("scaled", j,
+ event_scaled_avg + j, event_scaled[i]+j);
+ else
+ event_scaled_avg[j] = -1;
}
}
runtime_nsecs_avg /= run_count;
@@ -420,9 +423,13 @@ static void print_stat(int argc, const char **argv)
fprintf(stderr, "\n");
- fprintf(stderr, " %14.9f seconds time elapsed.\n",
+ fprintf(stderr, " %14.9f seconds time elapsed",
(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;