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Commit cbc34ed1 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: fix tracepoints in scheduler 



The trace point only caught one of many places where a task changes cpu,
put it in the right place to we get all of them.

Change the signature while we're at it.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent f3134de6

include/trace/sched.h

+2 −2
Original line number Diff line number Diff line
@@ -30,8 +30,8 @@ DECLARE_TRACE(sched_switch, 
		TPARGS(rq, prev, next));



DECLARE_TRACE(sched_migrate_task,

	TPPROTO(struct rq *rq, struct task_struct *p, int dest_cpu),

		TPARGS(rq, p, dest_cpu));

	TPPROTO(struct task_struct *p, int orig_cpu, int dest_cpu),

		TPARGS(p, orig_cpu, dest_cpu));



DECLARE_TRACE(sched_process_free,

	TPPROTO(struct task_struct *p),

kernel/sched.c

+2 −1
Original line number Diff line number Diff line
@@ -1851,6 +1851,8 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu) 


	clock_offset = old_rq->clock - new_rq->clock;



	trace_sched_migrate_task(p, task_cpu(p), new_cpu);



#ifdef CONFIG_SCHEDSTATS

	if (p->se.wait_start)

		p->se.wait_start -= clock_offset;
@@ -2868,7 +2870,6 @@ static void sched_migrate_task(struct task_struct *p, int dest_cpu) 
	    || unlikely(!cpu_active(dest_cpu)))

		goto out;



	trace_sched_migrate_task(rq, p, dest_cpu);

	/* force the process onto the specified CPU */

	if (migrate_task(p, dest_cpu, &req)) {

		/* Need to wait for migration thread (might exit: take ref). */