linux-kernel - Re: [RFC PATCH 0/3] sched: Introduce Window Assisted Load Tracking

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Date:   Fri, 28 Oct 2016 00:57:05 -0700
From:   Vikram Mulukutla <markivx@...eaurora.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Srivatsa Vaddagiri <vatsa@...eaurora.org>,
        Steve Muckle <steve.muckle@...aro.org>,
        Olav Haugan <ohaugan@...eaurora.org>,
        Syed Rameez Mustafa <rameezmustafa@...eaurora.org>,
        Joonwoo Park <joonwoop@...eaurora.org>,
        Pavankumar Kondeti <pkondeti@...eaurora.org>,
        Saravana Kannan <skannan@...eaurora.org>,
        Bryan Huntsman <bryanh@...eaurora.org>,
        Juri Lelli <juri.lelli@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Chris Redpath <chris.redpath@....com>,
        Robin Randhawa <robin.randhawa@....com>,
        Patrick Bellasi <patrick.bellasi@....com>,
        Todd Kjos <tkjos@...gle.com>,
        Srinath Sridharan <srinathsr@...gle.com>,
        Andres Oportus <andresoportus@...gle.com>,
        Leo Yan <leo.yan@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Vikram Mulukutla <markivx@...eauorora.org>
Subject: Re: [RFC PATCH 0/3] sched: Introduce Window Assisted Load Tracking

On 2016-10-28 00:49, Peter Zijlstra wrote:
> On Fri, Oct 28, 2016 at 12:10:39AM -0700, Vikram Mulukutla wrote:
>> This RFC patch has been tested on live X86 machines with the following 
>> sanity
>> and benchmark results (thanks to Juri Lelli, Dietmar Eggeman, Patrick 
>> Bellasi
>> for initial code reviews):
>> 
>> (Tested on an Intel i7 2nd generation CPU, 8GB RAM, Nvidia GTX950Ti 
>> graphics,
>> with the same frequency list as above. Running Ubuntu 16.04 on a 
>> v4.8.2
>> baseline. WALT window size was 10ms. Only deltas above 3% are 
>> considered
>> non-noise.Power measured with Intel RAPL counters)
> 
> Was this comparison done using the use_walt_metric sysctl knob?

Yes, it was. You will want to see numbers against a pure 4.8.2 without 
any
of the WALT code, correct?