Messages in this thread | | | Subject | Re: [RFC/RFT][PATCH 0/4] cpufreq / sched: iowait boost in intel_pstate and schedutil | From | Srinivas Pandruvada <> | Date | Thu, 08 Sep 2016 10:30:54 -0700 |
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On Thu, 2016-09-08 at 17:02 +0200, Rafael J. Wysocki wrote: > On Thursday, September 08, 2016 03:15:49 AM Rafael J. Wysocki wrote: > > > > On Wednesday, September 07, 2016 05:49:31 PM Srinivas Pandruvada > > wrote: > > > > > > On Thu, 2016-09-08 at 02:44 +0200, Rafael J. Wysocki wrote: > > > > > > > > On Wednesday, September 07, 2016 05:35:50 PM Srinivas > > > > Pandruvada > > > > wrote: > > > > > > > > > > > > > > > On Wed, 2016-09-07 at 17:22 -0700, Steve Muckle wrote: > > > > > > > > > > > > > > > > > > On Sat, Sep 03, 2016 at 02:56:48AM +0200, Rafael J. Wysocki > > > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > Please let me know what you think and if you can run some > > > > > > > benchmarks you > > > > > > > care about and see if the changes make any difference > > > > > > > (this way > > > > > > > or > > > > > > > another), > > > > > > > please do that and let me know what you've found. > > > > > > > > > > > > LGTM (I just reviewed the first and last patch, skipping > > > > > > the > > > > > > intel_pstate ones). > > > > > > > > > > > > I was unable to see a conclusive power regression in > > > > > > Android > > > > > > audio, > > > > > > video or > > > > > > idle usecases on my hikey 96board. > > > > > Did you see any performance regression on Android workloads? > > > > > > > > That's with schedutil and IOwait boost. Why would performance > > > > regress? > > > Some Android tests reach thermal limits and aggressive throttling > > > causes performance issues. > > > > I see, OK. > > But in that case Steve would see a power regression as well IMO. > It would > be rather difficult to reach thermal limits without consuming more > energy, > wouldn't it? :-) Yes. It depends on workloads. Idle and AV tests which tend to use HW encoding/decoding don't stress CPU enough in my experience. May be something like CPU Mark or Disk mark score.
Anyway this shouldn't be a reason for not including a change.
Thanks, Srinivas
> > Thanks, > Rafael > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" > in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
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