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Date: Wed, 16 Mar 2016 11:20:45 -0700 From: Steve Muckle <steve.muckle@...aro.org> To: Peter Zijlstra <peterz@...radead.org>, Michael Turquette <mturquette@...libre.com> Cc: rjw@...ysocki.net, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, Juri.Lelli@....com, morten.rasmussen@....com, dietmar.eggemann@....com, vincent.guittot@...aro.org, Michael Turquette <mturquette+renesas@...libre.com> Subject: Re: [PATCH 6/8] cpufreq/schedutil: sum per-sched class utilization On 03/16/2016 12:38 AM, Peter Zijlstra wrote: > Somewhere in the giant discussions I mentioned that we should be looking > at a CPPC like interface and pass {min,max} tuples to the cpufreq > selection thingy. > > In that same discussion I also mentioned that we must compute min as the > hard dl reservation, but that for max we can actually use the avg dl + > avg rt + avg cfs. > > That way there is far more room for selecting a sensible frequency. Doesn't the above min/max policy mean that the platform will likely underserve the task load? If avg dl+rt+cfs represents our best estimate of the work to be done, I would think that should be the min.
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