[Bug 65396] [IVB] FBC increases power for libva video workload
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Oct 14 19:51:20 PDT 2014
https://bugs.freedesktop.org/show_bug.cgi?id=65396
--- Comment #23 from zhixinx.liu <zhixinx.liu at intel.com> ---
(In reply to Jani Nikula from comment #21)
> Please retest with current nightly.
ignore my last commit.
virify FBC function with kernel3.17.0_drm-intel-nightly_ead7d7_20141013. and we
found that:
For HSW=>
Save power when running idle/browser/video workload after enable FBC.
Not save power when running game workload after enable FBC.
For IVB=>
Cannot enable FBC with IVB.
When set i915.enable_fbc=1 or i915.enable_fbc=0, after reboot and start X,
check the FBS status that it's always disable. log:
[root at x-ivb16 opt]# cat /sys/kernel/debug/dri/0/i915_fbc_status
FBC disabled: multiple pipes are enabled
It's new design or issue?
Test result:
----------------------------------------
HSW-ult FBC disable Average_watt FBC enable Average_watt
idle 11.0 10.9
browser 14.1 14.0
video 13.2 12.8
game 20.6 20.6
Test Env:
Arch: x86_64
Libdrm: (master)libdrm-2.4.56
Mesa: (10.3)9f67c26d1b424b8f3d86b5435c8f74d0a81eb86d
Xserver: (server-1.16-branch)xorg-server-1.16.0
Xf86_video_intel: (master)2.99.914
Libva: (master)e0d25ece01e7aba819c910e98c4fb4706cdab055
Libva_intel_driver:(master)e02449a1d65b44a82b5f2fcdf8a5b0ba51c2bb6a
Ffmpeg: (master)1b5ccae0f2045ac86bc9e1257cec1b3fba81315f
Mplayer: (hwaccel-vaapi)1923fa10ed77bbf8408f2ce312d85a97dab1f0f3
Glib: (master)3b8bc8bacf1fe31cda44fb5293711e87989388ea
Gstreamer10: (1.2)861ca3d6787d84c9bea7110cb46821e9b8f63aff
Gst_plugins_base10:(1.2)df7e7daa29ba14447b4d8dd43c35d8a3ad9e4984
Gst_plugins_good10:(1.2)e0417c28d56ac64a2e8d149bbaf812d2ce227153
Gst_plugins_bad10: (1.2)277b8c34e7214177764833b73f17e43ced496f8f
Gst_plugins_ugly10:(1.2)2233d97e6ad1a3988d9a9ca0fc0cf00ec4031a8f
Gst_plugins_vaapi10:(master)406aa37373e2b9917714eccd2834a45d18b61fd1
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