Commit 95a01552 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched/fair: Limit hrtick work 



The task_tick_fair() function does:

 - update the hierarchical runtimes
 - drive NUMA-balancing
 - update load-balance statistics
 - drive force-idle preemption

All but the very first can be limited to the periodic tick. Let hrtick
only update accounting and drive preemption, not load-balancing and
other bits.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Link: https://patch.msgid.link/20250918080205.563385766@infradead.org
parent a03fee33

kernel/sched/fair.c

+6 −0
Original line number Diff line number Diff line
@@ -13332,6 +13332,12 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued) 
		entity_tick(cfs_rq, se, queued);

	}



	if (queued) {

		if (!need_resched())

			hrtick_start_fair(rq, curr);

		return;

	}



	if (static_branch_unlikely(&sched_numa_balancing))

		task_tick_numa(rq, curr);