From 7793527b90d9418211f4fe8464cc1dcb1631ea1b Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Thu, 9 Jul 2009 13:57:20 +0200 Subject: [PATCH] sched: Reset sched stats on fork() The sched_stat fields are currently not reset upon fork. Ingo's recent commit 6c594c21fcb02c662f11c97be4d7d2b73060a205 did reset nr_migrations, but it didn't reset any of the others. This patch resets all sched_stat fields on fork. Signed-off-by: Lucas De Marchi Signed-off-by: Peter Zijlstra LKML-Reference: <193b0f820907090457s7a3662f4gcdecdc22fcae857b@mail.gmail.com> Signed-off-by: Ingo Molnar --- kernel/sched.c | 40 +++++++++++++++++++++++++++++++--------- 1 file changed, 31 insertions(+), 9 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index a17f3d9a8bf..c4549bd7e17 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -2572,15 +2572,37 @@ static void __sched_fork(struct task_struct *p) p->se.avg_wakeup = sysctl_sched_wakeup_granularity; #ifdef CONFIG_SCHEDSTATS - p->se.wait_start = 0; - p->se.sum_sleep_runtime = 0; - p->se.sleep_start = 0; - p->se.block_start = 0; - p->se.sleep_max = 0; - p->se.block_max = 0; - p->se.exec_max = 0; - p->se.slice_max = 0; - p->se.wait_max = 0; + p->se.wait_start = 0; + p->se.wait_max = 0; + p->se.wait_count = 0; + p->se.wait_sum = 0; + + p->se.sleep_start = 0; + p->se.sleep_max = 0; + p->se.sum_sleep_runtime = 0; + + p->se.block_start = 0; + p->se.block_max = 0; + p->se.exec_max = 0; + p->se.slice_max = 0; + + p->se.nr_migrations_cold = 0; + p->se.nr_failed_migrations_affine = 0; + p->se.nr_failed_migrations_running = 0; + p->se.nr_failed_migrations_hot = 0; + p->se.nr_forced_migrations = 0; + p->se.nr_forced2_migrations = 0; + + p->se.nr_wakeups = 0; + p->se.nr_wakeups_sync = 0; + p->se.nr_wakeups_migrate = 0; + p->se.nr_wakeups_local = 0; + p->se.nr_wakeups_remote = 0; + p->se.nr_wakeups_affine = 0; + p->se.nr_wakeups_affine_attempts = 0; + p->se.nr_wakeups_passive = 0; + p->se.nr_wakeups_idle = 0; + #endif INIT_LIST_HEAD(&p->rt.run_list);