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9fe89f022c
linux/kernel/sched
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Peter Zijlstra 9fe89f022c sched/fair: More complex proportional newidle balance 
It turns out that a few workloads (easyWave, fio) have a fairly low
success rate on newidle balance, but still benefit greatly from having
it anyway.

Luckliky these workloads have a faily low newidle rate, so the cost if
doing the newidle is relatively low, even if unsuccessfull.

Add a simple rate based part to the newidle ratio compute, such that
low rate newidle will still have a high newidle ratio.

This cures the easyWave and fio workloads while not affecting the
schbench numbers either (which have a very high newidle rate).

Reported-by: Mario Roy <marioeroy@gmail.com>
Reported-by: "Mohamed Abuelfotoh, Hazem" <abuehaze@amazon.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Mario Roy <marioeroy@gmail.com>
Tested-by: "Mohamed Abuelfotoh, Hazem" <abuehaze@amazon.com>
Link: https://patch.msgid.link/20260127151748.GA1079264@noisy.programming.kicks-ass.net
2026-02-23 18:04:09 +01:00
..
autogroup.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
autogroup.h sched: Clean up and standardize #if/#else/#endif markers in sched/autogroup.[ch] 2025-06-13 08:47:14 +02:00
build_policy.c sched_ext: Move internal type and accessor definitions to ext_internal.h 2025-09-03 11:33:28 -10:00
build_utility.c sched/smp: Make SMP unconditional 2025-06-13 08:47:18 +02:00
clock.c sched/clock: Avoid false sharing for sched_clock_irqtime 2026-02-03 12:04:19 +01:00
completion.c sched: Make clangd usable 2025-06-11 11:20:53 +02:00
core_sched.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
core.c sched/core: Fix wakeup_preempt's next_class tracking 2026-02-23 11:19:19 +01:00
cpuacct.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpudeadline.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpudeadline.h sched/deadline: only set free_cpus for online runqueues 2025-10-16 11:13:49 +02:00
cpufreq_schedutil.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpufreq.c sched: Make clangd usable 2025-06-11 11:20:53 +02:00
cpupri.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpupri.h sched/smp: Make SMP unconditional 2025-06-13 08:47:18 +02:00
cputime.c - A nice cleanup to the paravirt code containing a unification of the paravirt 2026-02-10 19:01:45 -08:00
deadline.c sched/debug: Fix dl_server (re)start conditions 2026-02-03 12:04:18 +01:00
debug.c sched/debug: Fix dl_server (re)start conditions 2026-02-03 12:04:18 +01:00
ext_idle.c Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
ext_idle.h sched_ext: Always use SMP versions in kernel/sched/ext_idle.h 2025-06-13 14:47:59 -10:00
ext_internal.h sched_ext: Implement load balancer for bypass mode 2025-11-12 06:43:44 -10:00
ext.c sched/core: Fix wakeup_preempt's next_class tracking 2026-02-23 11:19:19 +01:00
ext.h sched_ext: Use cgroup_lock/unlock() to synchronize against cgroup operations 2025-09-03 11:36:07 -10:00
fair.c sched/fair: More complex proportional newidle balance 2026-02-23 18:04:09 +01:00
features.h sched/fair: More complex proportional newidle balance 2026-02-23 18:04:09 +01:00
idle.c sched_ext: Add a DL server for sched_ext tasks 2026-02-03 12:04:17 +01:00
isolation.c kthread: Honour kthreads preferred affinity after cpuset changes 2026-02-03 15:23:35 +01:00
loadavg.c Merge branch 'tip/sched/urgent' 2025-07-14 17:16:28 +02:00
Makefile sched: Enable context analysis for core.c and fair.c 2026-01-05 16:43:36 +01:00
membarrier.c rseq: Simplify the event notification 2025-11-04 08:30:09 +01:00
pelt.c treewide: Update email address 2026-01-11 06:09:11 -10:00
pelt.h sched/fair: Switch to task based throttle model 2025-09-03 10:03:14 +02:00
psi.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
rq-offsets.c sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
rt.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
sched-pelt.h sched: Make clangd usable 2025-06-11 11:20:53 +02:00
sched.h sched/core: Fix wakeup_preempt's next_class tracking 2026-02-23 11:19:19 +01:00
smp.h sched: Make clangd usable 2025-06-11 11:20:53 +02:00
stats.c sched/smp: Use the SMP version of schedstats 2025-06-13 08:47:21 +02:00
stats.h delayacct: add timestamp of delay max 2026-01-31 16:16:06 -08:00
stop_task.c sched/core: Rework sched_class::wakeup_preempt() and rq_modified_*() 2025-12-17 10:53:25 +01:00
swait.c sched: Make clangd usable 2025-06-11 11:20:53 +02:00
syscalls.c sched: Deadline has dynamic priority 2026-01-15 21:57:53 +01:00
topology.c sched/fair: More complex proportional newidle balance 2026-02-23 18:04:09 +01:00
wait_bit.c sched: Make clangd usable 2025-06-11 11:20:53 +02:00
wait.c ARM: 2025-07-30 17:14:01 -07:00