Commit-ID: ff5f3bbd40bfb8632f826f1f83223d95363f36af Gitweb: http://git.kernel.org/tip/ff5f3bbd40bfb8632f826f1f83223d95363f36af Author: Yunlong Song <yunlong.s...@huawei.com> AuthorDate: Tue, 31 Mar 2015 21:46:36 +0800 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 8 Apr 2015 09:07:27 -0300
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.s...@huawei.com> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Wang Nan <wangn...@huawei.com> Link: http://lkml.kernel.org/r/1427809596-29559-10-git-send-email-yunlong.s...@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-sched.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 7b7b798..5275bab 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
