Re: [PATCH 1/2] drm/i915: Boost RPS frequency for CPU stalls

["Meng, Mengmeng" <mengmeng.meng@xxxxxxxxx>]

Hi,

It's Power results on IVB mobile. With the patches, workloads would cost more power.

mobile IVB
workloads	git-53749d3			git-53749d3 with four patches			Patches VS no Patch
	Average watt	Watt-hour	Time	Average watt	Watt-hour	Time	Average watt	Watt-hour
idle	25.6	3.7	9′	25.7	3.8	9′	100.39%	102.70%
video	30.7	2.7	5'30"	30.9	2.7	5'30"	100.65%	100.00%
game	33.5	6.4	11'43"	33.9	6.5	11'41"	101.19%	101.56%

 

Thanks,

Meng

 

 

-----Original Message-----
From: Chris Wilson [mailto:chris@xxxxxxxxxxxxxxxxxx]
Sent: Tuesday, August 27, 2013 6:49 PM
To: Meng, Mengmeng
Cc: Kenneth Graunke; Stéphane Marchesin; Owen Taylor; Zhuang, Lena; Zhang, Ouping; Jesse Barnes; intel-gfx@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [PATCH 1/2] drm/i915: Boost RPS frequency for CPU stalls

 

On Tue, Aug 27, 2013 at 10:12:29AM +0000, Meng, Mengmeng wrote:

>    Hi,

>

>    We test performance of this patch set compared to the current mainline

>    without these patches applied.

>

>    With patches v.s. the current mainline, most of performance change

>    little(<2%) except GL benchmark 2.7.0(↑5%). You may see results attached.

 

That looks like the range I found locally, and nice that there is no shocking regression. Can you schedule some power testing as well?

 

Thanks,

-Chris

 

--

Chris Wilson, Intel Open Source Technology Centre

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