linux-kernel - RE: Performance drop on Baytrail with 4.5-rc2

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Message-ID: <alpine.LSU.2.11.1603131651460.22532@er-systems.de>
Date:	Sun, 13 Mar 2016 16:54:55 +0100 (CET)
From:	Thomas Voegtle <tv@...96.de>
To:	"Longepe, Philippe" <philippe.longepe@...el.com>
cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Gasparini, Stephane" <stephane.gasparini@...el.com>,
	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>
Subject: RE: Performance drop on Baytrail with 4.5-rc2

On Wed, 3 Feb 2016, Longepe, Philippe wrote:

> Hi Thomas,
>
> Thank you for sharing this test. I just did a quick test and yes this is 
> really interesting !
>
> Without the scale option, the load is close to 100% for each cpus (so 
> the pstates are increasing up to the turbo frequency) but with 
> scale=320:208, the load is oscillating (close to 50% in average), so the 
> requested frequencies are lower (the power is also reduced).
>
> I have a patch (not yet submitted) that reduce the gap for such a use 
> case.

Hi,

may I ask you where this patch stays? I have seen nothing in Linus' tree, 
that fixes that performance drop?


Thanks,

   Thomas