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(parent: 2835ead) | patch
sched: Limit the number of task migrations per batch on RT
authorThomas Gleixner <tglx@linutronix.de>
Tue, 28 Sep 2021 12:24:25 +0000 (14:24 +0200)
committerPeter Zijlstra <peterz@infradead.org>
Tue, 5 Oct 2021 13:52:11 +0000 (15:52 +0200)
commit3149e8af294c4d55fd6624e59273147b8f2b5932
treeb9c8a83cf7208a3bc1f18f726be956e6d579e5c9tree | snapshot
parent2835ead63d2c537fb34c6146b0d8b5ca1e7d0c7fcommit | diff
sched: Limit the number of task migrations per batch on RT

Batched task migrations are a source for large latencies as they keep the
scheduler from running while processing the migrations.

Limit the batch size to 8 instead of 32 when running on a RT enabled
kernel.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210928122411.425097596@linutronix.de
kernel/sched/core.c diff | blob | history
Linux Kernel Source Tree.