Messages in this thread | | | Date | Thu, 9 Dec 2021 13:22:08 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2 1/3] sched/fair: avoid burst statistic if it's not set |
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On Wed, Dec 08, 2021 at 10:50:18PM +0800, Honglei Wang wrote: > It's not necessary to do burst associated statistic and calculation for > runtime if the burst feature is not set at all. Just return at the very > start point if so. > > Signed-off-by: Honglei Wang <wanghonglei@didichuxing.com> > --- > kernel/sched/fair.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > index 6e476f6d9435..2cd626c22912 100644 > --- a/kernel/sched/fair.c > +++ b/kernel/sched/fair.c > @@ -4640,6 +4640,11 @@ void __refill_cfs_bandwidth_runtime(struct cfs_bandwidth *cfs_b) > if (unlikely(cfs_b->quota == RUNTIME_INF)) > return; > > + if (cfs_b->burst == 0 && cfs_b->runtime_snap == cfs_b->quota) { > + cfs_b->runtime = cfs_b->quota; > + return; > + } > + > cfs_b->runtime += cfs_b->quota; > runtime = cfs_b->runtime_snap - cfs_b->runtime; > if (runtime > 0) {
What actual purpose does this patch serve, other than to increase the line-count?
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