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| author | Ingo Molnar <mingo@elte.hu> | 2009-06-27 06:24:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-27 06:34:37 +0200 |
| commit | 566747e6298289c5cb02d4939cb3abf1c4fe7e5a (patch) | |
| tree | 5762ec2d18b2ec3d7c727ac683d95cb3ca54dc21 /tools/perf/builtin-stat.c | |
| parent | 0cfb7a13b8e4e0afd4b856156ab16a182de7505b (diff) | |
| download | lwn-566747e6298289c5cb02d4939cb3abf1c4fe7e5a.tar.gz lwn-566747e6298289c5cb02d4939cb3abf1c4fe7e5a.zip | |
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/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index cdcd058fac08..52c176cc683e 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; |