Date: Wed, 11 Feb 2026 05:17:37 +0000 From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 4e5c15f3107e - stable/15 - tuning.7: document schedulers knobs Message-ID: <698c10f1.2670b.2f28d179@gitrepo.freebsd.org>
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The branch stable/15 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=4e5c15f3107e8c288bab3bfc5a9607c492e4c65d commit 4e5c15f3107e8c288bab3bfc5a9607c492e4c65d Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2026-01-29 21:40:29 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2026-02-11 05:12:37 +0000 tuning.7: document schedulers knobs (cherry picked from commit 0730a05cd383276ca8eedf295509e869ac9b88a0) --- share/man/man7/tuning.7 | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/share/man/man7/tuning.7 b/share/man/man7/tuning.7 index c03cce0aba0f..586b63c247a8 100644 --- a/share/man/man7/tuning.7 +++ b/share/man/man7/tuning.7 @@ -601,6 +601,32 @@ See the section in the .Xr sendfile 2 manual page for details. +.Sh SCHEDULERS +.Fx +allows having more than one scheduler specified in the kernel config, +and the desired scheduler selected from them at boot time. +Right now the options are: +.Bl -tag -width SCHED_4BSD +.It Cd SCHED_ULE +The modern scheduler with O(1) thread selection behavior. +.It Cd SCHED_4BSD +Classic scheduler inherited from 4.x BSD. +.El +.Pp +At least one option must be specified. +.Cd SCHED_ULE +is used by default if compiled in. +.Pp +The +.Va kern.sched.available +sysctl provides the comma-separated list of available (compiled in) +schedulers. +The +.Va kern.sched.name +loader tunable can be set to select the desired scheduler at boot time. +The +.Va kern.sched.name +sysctl reports which scheduler is used. .Sh KERNEL CONFIG TUNING There are a number of kernel options that you may have to fiddle with in a large-scale system.home | help
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