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sched: disable source/target_load bias

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The bias given by source/target_load functions can be very large, disable
it by default to get faster convergence.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2008-06-27 13:41:33 +02:00 committed by Ingo Molnar
parent cb5ef42a03
commit 93b75217df
2 changed files with 3 additions and 2 deletions
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4
kernel/sched.c
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@ -2000,7 +2000,7 @@ static unsigned long source_load(int cpu, int type)
struct rq *rq = cpu_rq(cpu); struct rq *rq = cpu_rq(cpu);
unsigned long total = weighted_cpuload(cpu); unsigned long total = weighted_cpuload(cpu);
if (type == 0) if (type == 0 || !sched_feat(LB_BIAS))
return total; return total;
return min(rq->cpu_load[type-1], total); return min(rq->cpu_load[type-1], total);
@ -2015,7 +2015,7 @@ static unsigned long target_load(int cpu, int type)
struct rq *rq = cpu_rq(cpu); struct rq *rq = cpu_rq(cpu);
unsigned long total = weighted_cpuload(cpu); unsigned long total = weighted_cpuload(cpu);
if (type == 0) if (type == 0 || !sched_feat(LB_BIAS))
return total; return total;
return max(rq->cpu_load[type-1], total); return max(rq->cpu_load[type-1], total);

1
kernel/sched_features.h
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@ -8,3 +8,4 @@ SCHED_FEAT(SYNC_WAKEUPS, 1)
SCHED_FEAT(HRTICK, 1) SCHED_FEAT(HRTICK, 1)
SCHED_FEAT(DOUBLE_TICK, 0) SCHED_FEAT(DOUBLE_TICK, 0)
SCHED_FEAT(ASYM_GRAN, 1) SCHED_FEAT(ASYM_GRAN, 1)
SCHED_FEAT(LB_BIAS, 0)