http://bugs.freedesktop.org/show_bug.cgi?id=26816
Summary: AGP KMS x11 video perf problem.
Product: DRI
Version: XOrg CVS
Platform: x86 (IA32)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Radeon
AssignedTo: dri-devel@lists.sourceforge.net
ReportedBy: li...@andyfurniss.entadsl.com
RV670 AGP running git ddx, xserver, libdrm and drt + nopat/AGP ttm caching fix
patch. Problem is not new.
I think there is a caching problem with KMS that does not happen with UMS which
makes video that doesn't use xv like flash or mplayer -vo x11 eat too much Cpu.
A partial work around can be achieved by disabling accel UTS, but it's still
not as good as UMS.
Some top figures - this is with mplayer -vo x11 704x...@25fps Cpu is single
core 2.1GHz.
UMS
Cpu(s): 18.7%us, 2.3%sy, 0.0%ni, 79.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
2504 andy 40 0 39008 13m 7748 S 13.3 1.5 0:01.10 mplayer
2472 root 40 0 591m 8508 5872 S 7.3 0.9 0:02.51 Xorg
KMS + ExaNoUploadToScreen
Cpu(s): 36.3%us, 0.3%sy, 0.0%ni, 63.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
4955 root 40 0 21140 9052 5760 S 22.9 1.0 0:04.76 Xorg
5006 andy 40 0 37980 13m 7836 S 13.6 1.5 0:00.71 mplayer
KMS
Cpu(s): 17.9%us, 60.8%sy, 0.0%ni, 21.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
4897 root 40 0 19628 8684 6040 R 65.8 1.0 0:29.11 Xorg
4925 andy 40 0 37980 13m 7836 S 13.0 1.5 0:00.91 mplayer
Will try and get a useful sysprof current effort just says in kernel for the
last case.
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