Commit d4a7882f authored by Zhongqiu Han's avatar Zhongqiu Han Committed by Rafael J. Wysocki
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cpuidle: menu: Optimize bucket assignment when next_timer_ns equals KTIME_MAX 



Directly assign the last bucket value instead of calling which_bucket()
when next_timer_ns equals KTIME_MAX, the largest possible value that
always falls into the last bucket.

This avoids unnecessary calculations and enhances performance.

Reviewed-by: default avatarChristian Loehle <christian.loehle@arm.com>
Signed-off-by: default avatarZhongqiu Han <quic_zhonhan@quicinc.com>
Link: https://patch.msgid.link/20250405135308.1854342-1-quic_zhonhan@quicinc.com


Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 194c396e

drivers/cpuidle/governors/menu.c

+1 −1
Original line number Diff line number Diff line
@@ -255,7 +255,7 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev, 
		 */

		data->next_timer_ns = KTIME_MAX;

		delta_tick = TICK_NSEC / 2;

		data->bucket = which_bucket(KTIME_MAX);

		data->bucket = BUCKETS - 1;

	}



	if (unlikely(drv->state_count <= 1 || latency_req == 0) ||