Commit a47ab937 authored Nov 09, 2005 by Chen, Kenneth W Committed by Linus Torvalds Nov 09, 2005

[PATCH] optimize activate_task()



recalc_task_prio() is called from activate_task() to calculate dynamic
priority and interactive credit for the activating task.  For real-time
scheduling process, all that dynamic calculation is thrown away at the end
because rt priority is fixed.  Patch to optimize recalc_task_prio() away
for rt processes.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <piggin@cyberone.com.au>
Cc: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 6730c3c1

kernel/sched.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -815,6 +815,7 @@ static void activate_task(task_t p, runqueue_t rq, int local)
		}
		#endif

		if (!rt_task(p))
		p->prio = recalc_task_prio(p, now);

		/*

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