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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-10-15 17:00:05 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:05 +0200 |
| commit | 94dfb5e75ef59068a8cf68fa6e18f25ebdcd20b9 (patch) | |
| tree | 3ff5c162ffbc0e796db250f8a0562292118829f3 | |
| parent | 28a1f6fa2f7ecec7e5da28b03a24abbecbd2e864 (diff) | |
sched: add tree based averages
add support for tree based vruntime averages.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/sched.c | 6 | ||||
| -rw-r--r-- | kernel/sched_fair.c | 20 |
2 files changed, 18 insertions, 8 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index bf85b4b281c..198b07a6d03 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -399,6 +399,8 @@ enum { SCHED_FEAT_SLEEPER_AVG = 4, SCHED_FEAT_SLEEPER_LOAD_AVG = 8, SCHED_FEAT_START_DEBIT = 16, + SCHED_FEAT_USE_TREE_AVG = 32, + SCHED_FEAT_APPROX_AVG = 64, }; const_debug unsigned int sysctl_sched_features = @@ -406,7 +408,9 @@ const_debug unsigned int sysctl_sched_features = SCHED_FEAT_NEW_FAIR_SLEEPERS *1 | SCHED_FEAT_SLEEPER_AVG *0 | SCHED_FEAT_SLEEPER_LOAD_AVG *1 | - SCHED_FEAT_START_DEBIT *1; + SCHED_FEAT_START_DEBIT *1 | + SCHED_FEAT_USE_TREE_AVG *0 | + SCHED_FEAT_APPROX_AVG *0; #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index c8c6b056139..86e5e8c5d10 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -547,16 +547,22 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se) static void place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) { - struct sched_entity *last = __pick_last_entity(cfs_rq); u64 min_runtime, latency; min_runtime = cfs_rq->min_vruntime; - if (last) { - min_runtime += last->vruntime; - min_runtime >>= 1; - if (initial && sched_feat(START_DEBIT)) - min_runtime += sysctl_sched_latency/2; - } + + if (sched_feat(USE_TREE_AVG)) { + struct sched_entity *last = __pick_last_entity(cfs_rq); + if (last) { + min_runtime = __pick_next_entity(cfs_rq)->vruntime; + min_runtime += last->vruntime; + min_runtime >>= 1; + } + } else if (sched_feat(APPROX_AVG)) + min_runtime += sysctl_sched_latency/2; + + if (initial && sched_feat(START_DEBIT)) + min_runtime += sched_slice(cfs_rq, se); if (!initial && sched_feat(NEW_FAIR_SLEEPERS)) { latency = sysctl_sched_latency; |