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cpuidle: menu: Optimize bucket assignment when next_timer_ns equals KTIME_MAX

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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: Christian Loehle <christian.loehle@arm.com>
Signed-off-by: Zhongqiu Han <quic_zhonhan@quicinc.com>
Link: https://patch.msgid.link/20250405135308.1854342-1-quic_zhonhan@quicinc.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Zhongqiu Han 2025-04-05 21:53:08 +08:00 committed by Rafael J. Wysocki
parent 194c396e8a
commit d4a7882f93
1 changed files with 1 additions and 1 deletions
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2
drivers/cpuidle/governors/menu.c
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@ -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) ||