Peter Zijlstra 15afe09bf4 sched: wakeup preempt when small overlap ... Lin Ming reported a 10% OLTP regression against 2.6.27-rc4. The difference seems to come from different preemption agressiveness, which affects the cache footprint of the workload and its effective cache trashing. Aggresively preempt a task if its avg overlap is very small, this should avoid the task going to sleep and find it still running when we schedule back to it - saving a wakeup. Reported-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2008-09-22 16:28:32 +02:00
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irq
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time	clockevents: remove WARN_ON which was used to gather information	2008-09-09 22:20:01 +02:00
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sched_fair.c	sched: wakeup preempt when small overlap	2008-09-22 16:28:32 +02:00
sched_features.h	sched: wakeup preempt when small overlap	2008-09-22 16:28:32 +02:00
sched_idletask.c	sched: wakeup preempt when small overlap	2008-09-22 16:28:32 +02:00
sched_rt.c	sched: wakeup preempt when small overlap	2008-09-22 16:28:32 +02:00
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sched.c	sched: wakeup preempt when small overlap	2008-09-22 16:28:32 +02:00
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