From a25707f3aef9cf68c341eba5960d580f364e4e6f Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 15 Oct 2007 17:00:03 +0200 Subject: sched: remove precise CPU load CPU load calculations are statistical anyway, and there's little benefit from having it calculated on every scheduling event. So remove this code, it gets rid of a divide from the scheduler wakeup and context-switch fastpath. Signed-off-by: Ingo Molnar Signed-off-by: Peter Zijlstra Signed-off-by: Mike Galbraith Reviewed-by: Thomas Gleixner --- kernel/sched_fair.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'kernel/sched_fair.c') diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 2138c40f4836..105d57b41aa2 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -94,16 +94,14 @@ enum { SCHED_FEAT_FAIR_SLEEPERS = 1, SCHED_FEAT_SLEEPER_AVG = 2, SCHED_FEAT_SLEEPER_LOAD_AVG = 4, - SCHED_FEAT_PRECISE_CPU_LOAD = 8, - SCHED_FEAT_START_DEBIT = 16, - SCHED_FEAT_SKIP_INITIAL = 32, + SCHED_FEAT_START_DEBIT = 8, + SCHED_FEAT_SKIP_INITIAL = 16, }; const_debug unsigned int sysctl_sched_features = SCHED_FEAT_FAIR_SLEEPERS *1 | SCHED_FEAT_SLEEPER_AVG *0 | SCHED_FEAT_SLEEPER_LOAD_AVG *1 | - SCHED_FEAT_PRECISE_CPU_LOAD *1 | SCHED_FEAT_START_DEBIT *1 | SCHED_FEAT_SKIP_INITIAL *0; -- cgit v1.2.2