Date: Sun, 11 May 2025 18:59:51 GMT From: Ka Ho Ng <khng@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 62f55b34ec42 - main - sched: mark several kern.sched.* sysctls as CTLFLAG_RWTUN Message-ID: <202505111859.54BIxpLP073015@gitrepo.freebsd.org>
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The branch main has been updated by khng: URL: https://cgit.FreeBSD.org/src/commit/?id=62f55b34ec42750adb1833414de07e88e5148899 commit 62f55b34ec42750adb1833414de07e88e5148899 Author: Ka Ho Ng <khng@FreeBSD.org> AuthorDate: 2025-05-11 18:59:10 +0000 Commit: Ka Ho Ng <khng@FreeBSD.org> CommitDate: 2025-05-11 18:59:30 +0000 sched: mark several kern.sched.* sysctls as CTLFLAG_RWTUN The following sysctls which are not touched during boot time initialization are marked as CTLFLAG_RWTUN so they can be set by loader tunables as well: - kern.sched.interact - kern.sched.preempt_thresh - kern.sched.static_boost - kern.sched.idlespins - kern.sched.balance - kern.sched.steal_idle - kern.sched.steal_thresh - kern.sched.trysteal_limit - kern.sched.always_steal MFC after: 1 week Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D50279 --- sys/kern/sched_ule.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/sys/kern/sched_ule.c b/sys/kern/sched_ule.c index 39cb648c2216..b29a37aa1026 100644 --- a/sys/kern/sched_ule.c +++ b/sys/kern/sched_ule.c @@ -3309,14 +3309,14 @@ SYSCTL_PROC(_kern_sched, OID_AUTO, quantum, "Quantum for timeshare threads in microseconds"); SYSCTL_INT(_kern_sched, OID_AUTO, slice, CTLFLAG_RW, &sched_slice, 0, "Quantum for timeshare threads in stathz ticks"); -SYSCTL_UINT(_kern_sched, OID_AUTO, interact, CTLFLAG_RW, &sched_interact, 0, +SYSCTL_UINT(_kern_sched, OID_AUTO, interact, CTLFLAG_RWTUN, &sched_interact, 0, "Interactivity score threshold"); -SYSCTL_INT(_kern_sched, OID_AUTO, preempt_thresh, CTLFLAG_RW, +SYSCTL_INT(_kern_sched, OID_AUTO, preempt_thresh, CTLFLAG_RWTUN, &preempt_thresh, 0, "Maximal (lowest) priority for preemption"); -SYSCTL_INT(_kern_sched, OID_AUTO, static_boost, CTLFLAG_RW, &static_boost, 0, +SYSCTL_INT(_kern_sched, OID_AUTO, static_boost, CTLFLAG_RWTUN, &static_boost, 0, "Assign static kernel priorities to sleeping threads"); -SYSCTL_INT(_kern_sched, OID_AUTO, idlespins, CTLFLAG_RW, &sched_idlespins, 0, +SYSCTL_INT(_kern_sched, OID_AUTO, idlespins, CTLFLAG_RWTUN, &sched_idlespins, 0, "Number of times idle thread will spin waiting for new work"); SYSCTL_INT(_kern_sched, OID_AUTO, idlespinthresh, CTLFLAG_RW, &sched_idlespinthresh, 0, @@ -3324,18 +3324,19 @@ SYSCTL_INT(_kern_sched, OID_AUTO, idlespinthresh, CTLFLAG_RW, #ifdef SMP SYSCTL_INT(_kern_sched, OID_AUTO, affinity, CTLFLAG_RW, &affinity, 0, "Number of hz ticks to keep thread affinity for"); -SYSCTL_INT(_kern_sched, OID_AUTO, balance, CTLFLAG_RW, &rebalance, 0, +SYSCTL_INT(_kern_sched, OID_AUTO, balance, CTLFLAG_RWTUN, &rebalance, 0, "Enables the long-term load balancer"); SYSCTL_INT(_kern_sched, OID_AUTO, balance_interval, CTLFLAG_RW, &balance_interval, 0, "Average period in stathz ticks to run the long-term balancer"); -SYSCTL_INT(_kern_sched, OID_AUTO, steal_idle, CTLFLAG_RW, &steal_idle, 0, +SYSCTL_INT(_kern_sched, OID_AUTO, steal_idle, CTLFLAG_RWTUN, &steal_idle, 0, "Attempts to steal work from other cores before idling"); -SYSCTL_INT(_kern_sched, OID_AUTO, steal_thresh, CTLFLAG_RW, &steal_thresh, 0, +SYSCTL_INT(_kern_sched, OID_AUTO, steal_thresh, CTLFLAG_RWTUN, &steal_thresh, 0, "Minimum load on remote CPU before we'll steal"); -SYSCTL_INT(_kern_sched, OID_AUTO, trysteal_limit, CTLFLAG_RW, &trysteal_limit, - 0, "Topological distance limit for stealing threads in sched_switch()"); -SYSCTL_INT(_kern_sched, OID_AUTO, always_steal, CTLFLAG_RW, &always_steal, 0, +SYSCTL_INT(_kern_sched, OID_AUTO, trysteal_limit, CTLFLAG_RWTUN, + &trysteal_limit, 0, + "Topological distance limit for stealing threads in sched_switch()"); +SYSCTL_INT(_kern_sched, OID_AUTO, always_steal, CTLFLAG_RWTUN, &always_steal, 0, "Always run the stealer from the idle thread"); SYSCTL_PROC(_kern_sched, OID_AUTO, topology_spec, CTLTYPE_STRING | CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_kern_sched_topology_spec, "A",
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