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Commit 93b75217 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: disable source/target_load bias 



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

Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent cb5ef42a

kernel/sched.c

+2 −2
Original line number Diff line number Diff line
@@ -2000,7 +2000,7 @@ static unsigned long source_load(int cpu, int type) 
	struct rq *rq = cpu_rq(cpu);

	unsigned long total = weighted_cpuload(cpu);



	if (type == 0)

	if (type == 0 || !sched_feat(LB_BIAS))

		return 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);

	unsigned long total = weighted_cpuload(cpu);



	if (type == 0)

	if (type == 0 || !sched_feat(LB_BIAS))

		return total;



	return max(rq->cpu_load[type-1], total);

kernel/sched_features.h

+1 −0
Original line number Diff line number Diff line
@@ -8,3 +8,4 @@ SCHED_FEAT(SYNC_WAKEUPS, 1) 
SCHED_FEAT(HRTICK, 1)

SCHED_FEAT(DOUBLE_TICK, 0)

SCHED_FEAT(ASYM_GRAN, 1)

SCHED_FEAT(LB_BIAS, 0)
 
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