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linux-6.1.y
linux/kernel/sched
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Peter Zijlstra 5b4634b2c8 sched/fair: Proportional newidle balance 
commit 33cf66d883 upstream.

Add a randomized algorithm that runs newidle balancing proportional to
its success rate.

This improves schbench significantly:

 6.18-rc4:			2.22 Mrps/s
 6.18-rc4+revert:		2.04 Mrps/s
 6.18-rc4+revert+random:	2.18 Mrps/S

Conversely, per Adam Li this affects SpecJBB slightly, reducing it by 1%:

 6.17:			-6%
 6.17+revert:		 0%
 6.17+revert+random:	-1%

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Chris Mason <clm@meta.com>
Link: https://lkml.kernel.org/r/6825c50d-7fa7-45d8-9b81-c6e7e25738e2@meta.com
Link: https://patch.msgid.link/20251107161739.770122091@infradead.org
[ Ajay: Modified to apply on v6.1 ]
Signed-off-by: Ajay Kaher <ajay.kaher@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-01-11 15:19:26 +01:00
..
autogroup.c
…
autogroup.h
…
build_policy.c
…
build_utility.c
…
clock.c
…
completion.c
…
core_sched.c
…
core.c
sched/fair: Proportional newidle balance
2026-01-11 15:19:26 +01:00
cpuacct.c
…
cpudeadline.c
sched/deadline: only set free_cpus for online runqueues
2026-01-11 15:18:39 +01:00
cpudeadline.h
sched/deadline: only set free_cpus for online runqueues
2026-01-11 15:18:39 +01:00
cpufreq_schedutil.c
cpufreq/sched: Explicitly synchronize limits_changed flag handling
2025-09-09 18:54:18 +02:00
cpufreq.c
…
cpupri.c
sched/rt: Fix live lock between select_fallback_rq() and RT push
2023-10-06 14:57:02 +02:00
cpupri.h
…
cputime.c
sched/cputime: Fix mul_u64_u64_div_u64() precision for cputime
2024-08-14 13:52:50 +02:00
deadline.c
sched/deadline: only set free_cpus for online runqueues
2026-01-11 15:18:39 +01:00
debug.c
Merge tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2022-10-10 17:53:04 -07:00
fair.c
sched/fair: Proportional newidle balance
2026-01-11 15:19:26 +01:00
features.h
sched/fair: Proportional newidle balance
2026-01-11 15:19:26 +01:00
idle.c
kernel/sched: Modify initial boot task idle setup
2023-10-06 14:57:02 +02:00
isolation.c
sched/isolation: Fix boot crash when maxcpus < first housekeeping CPU
2024-06-12 11:03:00 +02:00
loadavg.c
sched: Change nr_uninterruptible type to unsigned long
2025-07-24 08:51:54 +02:00
Makefile
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membarrier.c
sched/membarrier: reduce the ability to hammer on sys_membarrier
2024-02-23 09:12:52 +01:00
pelt.c
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pelt.h
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psi.c
sched: psi: fix bogus pressure spikes from aggregation race
2024-10-17 15:22:06 +02:00
rt.c
sched/rt: sysctl_sched_rr_timeslice show default timeslice after reset
2024-03-01 13:26:24 +01:00
sched-pelt.h
…
sched.h
sched/fair: Proportional newidle balance
2026-01-11 15:19:26 +01:00
smp.h
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stats.c
profiling: remove profile=sleep support
2024-08-14 13:52:50 +02:00
stats.h
sched/psi: Use task->psi_flags to clear in CPU migration
2025-02-21 13:48:54 +01:00
stop_task.c
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swait.c
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topology.c
sched/fair: Proportional newidle balance
2026-01-11 15:19:26 +01:00
wait_bit.c
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wait.c
wait: Return number of exclusive waiters awaken
2023-03-10 09:34:34 +01:00