linux-kernel - Re: [PATCH v2] sched/cputime: Make IRQ time accounting configurable at boot time

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Message-ID: <6e5c4d84-2f40-72f3-81de-163194bfa0fd@acm.org>
Date:   Mon, 26 Jun 2023 10:08:24 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Juri Lelli <juri.lelli@...hat.com>
Subject: Re: [PATCH v2] sched/cputime: Make IRQ time accounting configurable
 at boot time

On 6/20/23 07:10, Bart Van Assche wrote:
> IRQ time accounting reduces performance by 40% for some block storage
> workloads on Android. Despite this some producers of Android devices
> want to keep IRQ time accounting enabled.
> 
> Android devices share a single kernel binary across device vendors.
> Make IRQ time accounting configurable at boot time such that Android
> vendors can decide individually whether or not to enable IRQ time
> accounting.

Can anyone please help with reviewing this patch?

Thanks,

Bart.