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authorStephan Baerwolf <stephan.baerwolf@tu-ilmenau.de>2011-07-20 14:46:59 +0200
committerIngo Molnar <mingo@elte.hu>2011-07-21 18:01:55 +0200
commit2bd2d6f2dc952fc44fc52887de36e51896da96b9 (patch)
tree0b08e0ae13cad776cb216a4b85b1eb8d6eda6611 /lib/Kconfig.debug
parentacb5a9ba3bd7cd8b3264f67a3789a9587d3b935b (diff)
sched: Replace use of entity_key()
"entity_key()" is only used in "__enqueue_entity()" and its only function is to subtract a tasks vruntime by its groups minvruntime. Before this patch a rbtree enqueue-decision is done by comparing two tasks in the style: "if (entity_key(cfs_rq, se) < entity_key(cfs_rq, entry))" which would be "if (se->vruntime-cfs_rq->min_vruntime < entry->vruntime-cfs_rq->min_vruntime)" or (if reducing cfs_rq->min_vruntime out) "if (se->vruntime < entry->vruntime)" which is "if (entity_before(se, entry))" So we do not need "entity_key()". If "entity_before()" is inline we will also save one subtraction (only one, because "entity_key(cfs_rq, se)" was cached in "key") Signed-off-by: Stephan Baerwolf <stephan.baerwolf@tu-ilmenau.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-ns12mnd2h5w8rb9agd8hnsfk@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'lib/Kconfig.debug')
0 files changed, 0 insertions, 0 deletions

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