linux-kernel - Re: [PATCH v3 1/5] sched/fair: Account update_blocked_averages in newidle

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Message-ID: <20211021094311.GB3891@suse.de>
Date:   Thu, 21 Oct 2021 10:43:11 +0100
From:   Mel Gorman <mgorman@...e.de>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        bristot@...hat.com, linux-kernel@...r.kernel.org,
        tim.c.chen@...ux.intel.com
Subject: Re: [PATCH v3 1/5] sched/fair: Account update_blocked_averages in
 newidle_balance cost

On Tue, Oct 19, 2021 at 02:35:33PM +0200, Vincent Guittot wrote:
> The time spent to update the blocked load can be significant depending of
> the complexity fo the cgroup hierarchy. Take this time into account in
> the cost of the 1st load balance of a newly idle cpu.
> 
> Also reduce the number of call to sched_clock_cpu() and track more actual
> work.
> 
> Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>

Acked-by: Mel Gorman <mgorman@...e.de>

-- 
Mel Gorman
SUSE Labs