[PATCH 1/3] sched: rt: account the cpu time during the tick

Realtime tasks would not account their runtime during ticks. Which would lead
to:

        struct sched_param param = { .sched_priority = 10 };
        pthread_setschedparam(pthread_self(), SCHED_FIFO, &param);

	while (1) ;

Not showing up in top.

Signed-off-by: Peter Zijlstra <[email protected]>
---
 kernel/sched_rt.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-2.6/kernel/sched_rt.c
===================================================================
--- linux-2.6.orig/kernel/sched_rt.c
+++ linux-2.6/kernel/sched_rt.c
@@ -837,6 +837,8 @@ static void prio_changed_rt(struct rq *r
 
 static void task_tick_rt(struct rq *rq, struct task_struct *p)
 {
+	update_curr_rt(rq);
+
 	/*
 	 * RR tasks need a special form of timeslice management.
 	 * FIFO tasks have no timeslices.

--

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---

• References:
  • [PATCH 0/3] various scheduler patches
    • From: Peter Zijlstra <[email protected]>

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