linux-kernel - RE: Performance of low-cpu utilisation benchmark regressed severely since 4.6

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Date:   Tue, 25 Apr 2017 14:03:31 -0700
From:   "Doug Smythies" <dsmythies@...us.net>
To:     "'Rafael J. Wysocki'" <rafael@...nel.org>
Cc:     "'Rafael J. Wysocki'" <rjw@...ysocki.net>,
        "'Mel Gorman'" <mgorman@...hsingularity.net>,
        "'Rafael Wysocki'" <rafael.j.wysocki@...el.com>,
        'Jörg Otte' <jrg.otte@...il.com>,
        "'Linux Kernel Mailing List'" <linux-kernel@...r.kernel.org>,
        "'Linux PM'" <linux-pm@...r.kernel.org>,
        "'Srinivas Pandruvada'" <srinivas.pandruvada@...ux.intel.com>,
        "'Doug Smythies'" <dsmythies@...us.net>
Subject: RE: Performance of low-cpu utilisation benchmark regressed severely since 4.6

Hi Rafael,

Apologies, I reversed reported a couple of data points last night:

On 2017.04.25 00:13 Doug wrote:
> On 2017.04.24 07:25 Doug wrote:
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
>> Plus that patch is in progress.
>
>3387.76 Seconds.
> Idle power 3.85 watts.
>
> Other potentially interesting information for 2 hour idle test:
> Driver called 21209 times. Maximum duration 2396 Seconds. Minimum duration 20 mSec. 

Wrong, should read:

Driver called 21209 times. Maximum duration 2510 Seconds. Minimum duration 0.587 mSec.

> Compared to kernel 4.11-rc7 (passive mode, schedutil governor)
> 3297.82 (re-stated from a previous e-mail)
> Idle power 3.81 watts
>
> Other potentially interesting information for 2 hour idle test:
> Driver called 1631 times. Maximum duration 2510 Seconds. Minimum duration 0.587 mSec.

Wrong, should read:

Driver called 1631 times. Maximum duration 2396 Seconds. Minimum duration 20 mSec.