sched_ext: Optimize sched_ext_entity layout for cache locality

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Reorder struct sched_ext_entity to place ops_state, ddsp_dsq_id, and
ddsp_enq_flags immediately after dsq. These fields are accessed together
in the do_enqueue_task() and finish_dispatch() hot paths but were
previously spread across three different cache lines. Grouping them on
the same cache line reduces cache misses on every enqueue and dispatch
operation.

Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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David Carlier 2026-02-24 05:56:37 +00:00 • committed by Tejun Heo

parent 658ad2259b

commit 477174ac35

1 changed files with 3 additions and 3 deletions

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include/linux/sched/ext.h

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