linux-kernel - Re: [PATCH v5 7/7] sched/fair: Fair server interface

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Message-ID: <20231106154042.GH3818@noisy.programming.kicks-ass.net>
Date:   Mon, 6 Nov 2023 16:40:42 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Daniel Bristot de Oliveira <bristot@...nel.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        linux-kernel@...r.kernel.org,
        Luca Abeni <luca.abeni@...tannapisa.it>,
        Tommaso Cucinotta <tommaso.cucinotta@...tannapisa.it>,
        Thomas Gleixner <tglx@...utronix.de>,
        Joel Fernandes <joel@...lfernandes.org>,
        Vineeth Pillai <vineeth@...byteword.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Phil Auld <pauld@...hat.com>
Subject: Re: [PATCH v5 7/7] sched/fair: Fair server interface

On Sat, Nov 04, 2023 at 11:59:24AM +0100, Daniel Bristot de Oliveira wrote:
> Add an interface for fair server setup on debugfs.
> 
> Each rq have three files under /sys/kernel/debug/sched/rq/CPU{ID}:
> 
>  - fair_server_runtime: set runtime in ns
>  - fair_server_period: set period in ns
>  - fair_server_defer: on/off for the defer mechanism
> 

This then leaves /proc/sys/kernel/sched_rt_{period,runtime}_us to be the
total available bandwidth control, right?

But then shouldn've we also rip out the throttle thingy right quick?