linux-kernel - RE: [PATCH v6 0/3] cpufreq: Replace timers with utilization update callbacks

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Date:	Thu, 11 Feb 2016 23:25:18 -0800
From:	"Doug Smythies" <dsmythies@...us.net>
To:	"'Rafael J. Wysocki'" <rjw@...ysocki.net>,
	"'Srinivas Pandruvada'" <srinivas.pandruvada@...ux.intel.com>
Cc:	"'Linux PM list'" <linux-pm@...r.kernel.org>,
	"'Ingo Molnar'" <mingo@...nel.org>,
	"'Linux Kernel Mailing List'" <linux-kernel@...r.kernel.org>,
	"'Peter Zijlstra'" <peterz@...radead.org>,
	"'Viresh Kumar'" <viresh.kumar@...aro.org>,
	"'Juri Lelli'" <juri.lelli@....com>,
	"'Steve Muckle'" <steve.muckle@...aro.org>,
	"'Thomas Gleixner'" <tglx@...utronix.de>
Subject: RE: [PATCH v6 0/3] cpufreq: Replace timers with utilization update callbacks

On 2016.02.11 14:50 Doug Smythies wrote:
> On 2016.02.10 22:03 Srinivas Pandruvada wrote:
>> On Wednesday, February 10, 2016 03:11:43 PM Doug Smythies wrote:

>>> My test computer has an older model i7 (Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz)
>> Thanks Doug. If you have specific workloads, please compare performance.

> My work so far has been testing functionality, with unrealistic workloads specifically
> designed to exaggerate issues, in this case the duration problem.
>
> I'll look at some real world workload scenarios.

Turbostat used for package power, starts before Phoronix tests starts,
and ends after Phoronix test ends.

Control Sample: Kernel 4.5-rc3:
Phoronix ffmpeg: turbostat 180 Sec. 12.07 Sec. Ave. 27.14 Watts.
Phoronix apache: turbostat 200 Sec. 19797.0 R.P.S. Ave. 34.01 Watts.
Phoronix kernel: turbostat 180 Sec. 139.93 Sec. 49.09 Watts.
Phoronix Postmark (Disk Test): turbostat 200 Sec. 5813 T.P.S. Ave. 21.33 Watts.

Kernel 4.5-rc3 + RJW 3 patch set version 7:
Phoronix ffmpeg: turbostat 180 Sec. 11.67 Sec. Ave. 27.35 Watts.
Phoronix apache: turbostat 200 Sec. 19430.7 R.P.S. Ave. 34.18 Watts.
Phoronix kernel: turbostat 180 Sec. 139.81 Sec. 48.80 Watts.
Phoronix Postmark (Disk Test): turbostat 200 Sec. 5683 T.P.S. Ave. 22.41 Watts.

... Doug