diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2026-01-27 16:17:48 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-02-23 18:04:09 +0100 |
| commit | 9fe89f022c05d99c052d6bc088b82d4ff83bf463 (patch) | |
| tree | 3967b35e568221ab36e0617a86c6f5dbc5809c53 /kernel/sched/features.h | |
| parent | 3b68df978133ac3d46d570af065a73debbb68248 (diff) | |
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
Diffstat (limited to 'kernel/sched/features.h')
| -rw-r--r-- | kernel/sched/features.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/features.h b/kernel/sched/features.h index 136a6584be79..37d5928fa6dd 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -126,3 +126,4 @@ SCHED_FEAT(LATENCY_WARN, false) * Do newidle balancing proportional to its success rate using randomization. */ SCHED_FEAT(NI_RANDOM, true) +SCHED_FEAT(NI_RATE, true) |