linux-kernel - Re: [PATCH V1] sched: Cancel the slice protection of the idle entity

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Message-Id: <20250207064446.37346-1-15645113830zzh@gmail.com>
Date: Fri,  7 Feb 2025 14:44:47 +0800
From: zihan zhou <15645113830zzh@...il.com>
To: 15645113830zzh@...il.com
Cc: bsegall@...gle.com,
	dietmar.eggemann@....com,
	juri.lelli@...hat.com,
	linux-kernel@...r.kernel.org,
	mgorman@...e.de,
	mingo@...hat.com,
	peterz@...radead.org,
	rostedt@...dmis.org,
	vincent.guittot@...aro.org,
	vschneid@...hat.com
Subject: Re: [PATCH V1] sched: Cancel the slice protection of the idle entity

Hello, the submission of this patch is aimed at minimizing the impact of
SCHED_IDLE on SCHED_NORMAL.

For example, a task with SCHED_IDLE policy that sleeps for 1s and then
runs for 3 ms, running cyclictest on the same cpu, has a maximum latency
of 3 ms, which is caused by the slice protection of the idle entity.
It is unreasonable. With this patch, the cyclictest latency under the
same conditions is basically the same on the cpu with idle processes and
on empty cpu.

Looking forward to your reply!