linux-kernel - Re: [RFC PATCH 1/2] sched/rt: add utilization tracking

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Message-ID: <20170531113914.swzqiqvvguiwfelz@hirez.programming.kicks-ass.net>
Date:   Wed, 31 May 2017 13:39:14 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Juri Lelli <juri.lelli@....com>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>, mingo@...nel.org,
        linux-kernel@...r.kernel.org, rjw@...ysocki.net,
        dietmar.eggemann@....com, Morten.Rasmussen@....com
Subject: Re: [RFC PATCH 1/2] sched/rt: add utilization tracking

On Wed, May 31, 2017 at 11:41:11AM +0100, Juri Lelli wrote:
> On 31/05/17 12:30, Peter Zijlstra wrote:

> > Again, it seems I have this CPPC/HWP crud firmly stuck in my brain.
> > Because I was thinking:
> > 
> > 	min_freq = dl_util
> > 	avg_freq = dl_avg + rt_avg + cfs_util
> > 
> > 
> > But given we don't actually have that split... meh.
> > 
> 
> Right, interesting. So, I guess the question is: should we have it? :)

I think cpufreq should certainly look at moving into that direction, but
that's up to Rafael of course..