hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IA7CCA CVE: NA

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We find the commit bb29df9fb065 ("sched/fair: Introduce SIS_UTIL to search idle CPU..."), which cause performance degradation with Unixbench pipe-base contextswich case tested on Kunpeng 920B.

Test case: ./Run context1 -c `nproc` -i 3 Unixbench results (Pipe-based_Context_Switching): baseline patched 4.5w 8.5w

Test on Kunpeng 920B

Fixes: bb29df9fb065 ("sched/fair: Introduce SIS_UTIL to search idle CPU...") Signed-off-by: Hui Tang tanghui20@huawei.com --- kernel/sched/features.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/features.h b/kernel/sched/features.h index 83f524cea64d..1b789ae9079c 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -54,8 +54,8 @@ SCHED_FEAT(TTWU_QUEUE, true) /* * When doing wakeups, attempt to limit superfluous scans of the LLC domain. */ -SCHED_FEAT(SIS_PROP, false) -SCHED_FEAT(SIS_UTIL, true) +SCHED_FEAT(SIS_PROP, true) +SCHED_FEAT(SIS_UTIL, false)

#ifdef CONFIG_SCHED_STEAL /*