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authorYunlong Song <yunlong.song@huawei.com>2015-03-31 21:46:36 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-04-08 09:07:27 -0300
commitff5f3bbd40bfb8632f826f1f83223d95363f36af (patch)
tree8b3329a04edab38bf9f048e2307249e1341f2bc3 /tools/perf
parentf0dd330fdf07d295ac468660cf60341796d5d501 (diff)
downloadlinux-ff5f3bbd40bfb8632f826f1f83223d95363f36af.tar.gz
perf sched replay: Use replay_repeat to calculate the runavg of cpu usage instead of the default value 10
Since sched->replay_repeat is set to 10 as default, the sched->run_avg, sched->runavg_cpu_usage, and sched->runavg_parent_cpu_usage all use 10 to calculate their value. However, the replay_repeat can be changed to other value by using -r option, so the calculation above should use replay_repeat to achieve more accurate results instead of the default value 10. Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1427809596-29559-10-git-send-email-yunlong.song@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/builtin-sched.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 7b7b798b22b2..5275bab70313 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -607,13 +607,13 @@ static void wait_for_tasks(struct perf_sched *sched)
cpu_usage_1 = get_cpu_usage_nsec_parent();
if (!sched->runavg_cpu_usage)
sched->runavg_cpu_usage = sched->cpu_usage;
- sched->runavg_cpu_usage = (sched->runavg_cpu_usage * 9 + sched->cpu_usage) / 10;
+ sched->runavg_cpu_usage = (sched->runavg_cpu_usage * (sched->replay_repeat - 1) + sched->cpu_usage) / sched->replay_repeat;
sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
if (!sched->runavg_parent_cpu_usage)
sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
- sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * 9 +
- sched->parent_cpu_usage)/10;
+ sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * (sched->replay_repeat - 1) +
+ sched->parent_cpu_usage)/sched->replay_repeat;
ret = pthread_mutex_lock(&sched->start_work_mutex);
BUG_ON(ret);
@@ -645,7 +645,7 @@ static void run_one_test(struct perf_sched *sched)
sched->sum_fluct += fluct;
if (!sched->run_avg)
sched->run_avg = delta;
- sched->run_avg = (sched->run_avg * 9 + delta) / 10;
+ sched->run_avg = (sched->run_avg * (sched->replay_repeat - 1) + delta) / sched->replay_repeat;
printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0);