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Commit 112f53f5 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: old sleeper bonus 



Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent cd8ba7cd

kernel/sched.c

+3 −1
Original line number Diff line number Diff line
@@ -680,6 +680,7 @@ enum { 
	SCHED_FEAT_SYNC_WAKEUPS		= 32,

	SCHED_FEAT_HRTICK		= 64,

	SCHED_FEAT_DOUBLE_TICK		= 128,

	SCHED_FEAT_NORMALIZED_SLEEPER	= 256,

};



const_debug unsigned int sysctl_sched_features =
@@ -690,7 +691,8 @@ const_debug unsigned int sysctl_sched_features = 
		SCHED_FEAT_CACHE_HOT_BUDDY	* 1 |

		SCHED_FEAT_SYNC_WAKEUPS		* 1 |

		SCHED_FEAT_HRTICK		* 1 |

		SCHED_FEAT_DOUBLE_TICK		* 0;

		SCHED_FEAT_DOUBLE_TICK		* 0 |

		SCHED_FEAT_NORMALIZED_SLEEPER	* 1;



#define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)

kernel/sched_fair.c

+5 −2
Original line number Diff line number Diff line
@@ -501,8 +501,11 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) 
	if (!initial) {

		/* sleeps upto a single latency don't count. */

		if (sched_feat(NEW_FAIR_SLEEPERS)) {

			if (sched_feat(NORMALIZED_SLEEPER))

				vruntime -= calc_delta_fair(sysctl_sched_latency,

						&cfs_rq->load);

			else

				vruntime -= sysctl_sched_latency;

		}



		/* ensure we never gain time by being placed backwards. */