Bug 65395

Summary:	[HSW ULT] rc6 doesn't save power for libva video workload
Product:	DRI	Reporter:	Liu Tienan <tienan.liu>
Component:	DRM/Intel	Assignee:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Status:	CLOSED FIXED	QA Contact:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity:	major
Priority:	high	CC:	gordon.jin, haihao.xiang, lianyuex.yang, ouping.zhang, tienan.liu
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Liu Tienan 2013-06-05 07:50:33 UTC

System Environment:
----------------------------------------
Platform: HSW-ult
Libdrm:             (master)libdrm-2.4.45-3-g3586337f3703ce4833a375f66b08df064a1cec28
Mesa:                (9.1)cbe0e50247c909a7d34f71d9a1a4852b6c3af472
Xserver:             (master)7e97166c4fc38076b6224e4dbdd632b43444149f
Xf86_video_intel:  (master)2.21.6-47-gd6c30d1d4df6bcdfa075bd29da7c8aabee20774c
Cairo:                (master)631bf299256e11a17511977f357e0353fb5615f7
Libva:                (master)32e44bcf45ee0f4a345ccaedda1d45079e8186ed
Libva_intel_driver: (master)31caada2967b94705d78ab7f6d07965ad7f13d42
Kernel : 3.9.3


Test result:
----------------------------------------      
workloads         RC6 disable average_watt         RC6 enable average_watt
idle              18.3                             14.5
video             18.6                             18.6 
game              23.9                             22.7              


finding:
----------------------------------------
On the platform of HSW-ult, RC6 saved 3.8w when running idle, and saved 1.2w when running game, but did not save any power on video.

Comment 1 Daniel Vetter 2013-06-05 08:14:32 UTC

Can we have a detailed description of the video workload? Was libva used?

Comment 2 Liu Tienan 2013-06-05 08:31:28 UTC

We used libva, "mplayer -vo vaapi".
And this is our wiki "http://otcqa.sh.intel.com/qawiki/Graphics/Power-workloads", you can get more detailed information.
(In reply to comment #1)
> Can we have a detailed description of the video workload? Was libva used?

Comment 3 Chris Wilson 2013-06-09 09:05:58 UTC

Idle curiosity, but what is the power saving between mplayer -vo xv and mplayer -vo vaapi -va vaapi?

Comment 4 Liu Tienan 2013-06-13 03:07:35 UTC

test result
---------------
mplayer -vo xv                 19.6 Watt
mplayer -vo vaapi -va vaapi    18.7 Watt

And there is no picture on the screen when use "mplayer-vo xv"

Comment 5 Gordon Jin 2013-07-15 05:22:08 UTC

who would own this bug?

Comment 6 ye.tian 2013-07-15 08:23:36 UTC

kernel: (drm-intel-nightly)1f0031bcbc6e603c23f88afc9a3a8a5416e36075
HSW ULT C0 
Test result:
----------------------------------------      
workloads         RC6 disable average_watt         RC6 enable average_watt
video             18.6                             17.7 
game              20.5                             20.1

Comment 7 Chris Wilson 2013-07-15 09:08:22 UTC

Measurement error?

Comment 8 Ouping Zhang 2013-07-16 01:16:32 UTC

No, with the latest kernel, the issue was fixed, I am also curious
(In reply to comment #7)
> Measurement error?

Comment 9 Elizabeth 2017-10-06 14:46:06 UTC

Closing old verified.

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