]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/commit
projects / FreeBSD / FreeBSD.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: 2ae269f) | patch
MFC r352728: Microoptimize sched_pickcpu() CPU affinity on SMT.
authorAlexander Motin <mav@FreeBSD.org>
Thu, 24 Oct 2019 19:12:01 +0000 (19:12 +0000)
committerAlexander Motin <mav@FreeBSD.org>
Thu, 24 Oct 2019 19:12:01 +0000 (19:12 +0000)
commit67895ede9a09c71e20fe85e9faaed852ec47ee2f
treec482ae2bd0bdf9baf3cd0f0eaa4755033c1d40adtree | snapshot
parent2ae269f3849c1c762db47e0a9ca3b9d28f003fcccommit | diff
MFC r352728: Microoptimize sched_pickcpu() CPU affinity on SMT.

Use of CPU_FFS() to implement CPUSET_FOREACH() allows to save up to ~0.5%
of CPU time on 72-thread SMT system doing 80K IOPS to NVMe from one thread.
sys/kern/sched_ule.c diff | blob | history
Unnamed repository; edit this file 'description' to name the repository.