Messages in this thread Patch in this message | | | From | Yunlong Song <> | Subject | [PATCH 9/9] perf sched replay: Use replay_repeat to calculate the runavg of cpu usage instead of the default value 10 | Date | Tue, 31 Mar 2015 21:46:36 +0800 |
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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> --- 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); -- 1.8.5.2
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