sched: Reset sched stats on fork() (7793527b) · Commits · 戴 / test

The sched_stat fields are currently not reset upon fork. Ingo's recent commit 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 <lucas.de.marchi@gmail.com> Signed-off-by:

Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <193b0f820907090457s7a3662f4gcdecdc22fcae857b@mail.gmail.com> Signed-off-by:

Ingo Molnar <mingo@elte.hu>

kernel/sched.c

+31 −9

Original line number	Diff line number	Diff line
		@@ -2573,14 +2573,36 @@ static void __sched_fork(struct task_struct *p)

		#ifdef CONFIG_SCHEDSTATS
		p->se.wait_start = 0;
		p->se.sum_sleep_runtime = 0;
		p->se.wait_max = 0;
		p->se.wait_count = 0;
		p->se.wait_sum = 0;

		p->se.sleep_start = 0;
		p->se.block_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.wait_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);

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