History

sched: cleanup old and rarely used 'debug' features.

TREE_AVG and APPROX_AVG are initial task placement policies that have been disabled for a long while.. time to remove them.

Peter Zijlstra committed 18 years ago

Commit 2070ee01 parent ae518012 files · +2 −20Browse files

Unified · Split

2 files
  1. kernel/sched.c +2 −6
  2. kernel/sched_fair.c +0 −14
kernel/sched.c+2−6
@@ -594,18 +594,14 @@ enum { · 593 unmodified lines
594594 SCHED_FEAT_NEW_FAIR_SLEEPERS = 1,
595595 SCHED_FEAT_WAKEUP_PREEMPT = 2,
596596 SCHED_FEAT_START_DEBIT = 4,
597− SCHED_FEAT_TREE_AVG = 8,
598− SCHED_FEAT_APPROX_AVG = 16,
599− SCHED_FEAT_HRTICK = 32,
600− SCHED_FEAT_DOUBLE_TICK = 64,
597+ SCHED_FEAT_HRTICK = 8,
598+ SCHED_FEAT_DOUBLE_TICK = 16,
601599 };
602600
603601 const_debug unsigned int sysctl_sched_features =
604602 SCHED_FEAT_NEW_FAIR_SLEEPERS * 1 |
605603 SCHED_FEAT_WAKEUP_PREEMPT * 1 |
606604 SCHED_FEAT_START_DEBIT * 1 |
607− SCHED_FEAT_TREE_AVG * 0 |
608− SCHED_FEAT_APPROX_AVG * 0 |
609605 SCHED_FEAT_HRTICK * 1 |
610606 SCHED_FEAT_DOUBLE_TICK * 0;
611607
kernel/sched_fair.c+0−14
@@ -302,11 +302,6 @@ static u64 __sched_vslice(unsigned long rq_weight, unsigned long nr_running) · 301 unmodified lines
302302 return vslice;
303303 }
304304
305−static u64 sched_vslice(struct cfs_rq *cfs_rq)
306−{
307− return __sched_vslice(cfs_rq->load.weight, cfs_rq->nr_running);
308−}
309−
310305 static u64 sched_vslice_add(struct cfs_rq *cfs_rq, struct sched_entity *se)
311306 {
312307 return __sched_vslice(cfs_rq->load.weight + se->load.weight,
@@ -504,15 +499,6 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) · 191 unmodified lines
504499 } else
505500 vruntime = cfs_rq->min_vruntime;
506501
507− if (sched_feat(TREE_AVG)) {
508− struct sched_entity *last = __pick_last_entity(cfs_rq);
509− if (last) {
510− vruntime += last->vruntime;
511− vruntime >>= 1;
512− }
513− } else if (sched_feat(APPROX_AVG) && cfs_rq->nr_running)
514− vruntime += sched_vslice(cfs_rq)/2;
515−
516502 /*
517503 * The 'current' period is already promised to the current tasks,
518504 * however the extra weight of the new task will slow them down a