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platform_kernel-5.15
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[PATCH] sched: less aggressive idle balancing 

Remove the special casing for idle CPU balancing.  Things like this are
hurting for example on SMT, where are single sibling being idle doesn't really
warrant a really aggressive pull over the NUMA domain, for example.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2005-06-25 14:57:12 -07:00 committed by Linus Torvalds
parent db935dbd43
commit 99b61ccf0b
1 changed files with 0 additions and 6 deletions
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6
kernel/sched.c
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@ -1877,15 +1877,9 @@ find_busiest_group(struct sched_domain *sd, int this_cpu,
/* Get rid of the scaling factor, rounding down as we divide */ /* Get rid of the scaling factor, rounding down as we divide */
*imbalance = *imbalance / SCHED_LOAD_SCALE; *imbalance = *imbalance / SCHED_LOAD_SCALE;
return busiest; return busiest;
out_balanced: out_balanced:
if (busiest && (idle == NEWLY_IDLE ||
(idle == SCHED_IDLE && max_load > SCHED_LOAD_SCALE)) ) {
*imbalance = 1;
return busiest;
}
*imbalance = 0; *imbalance = 0;
return NULL; return NULL;