[mythtv-users] Very variable CPU usage from X using bob deinterlace
junk at giantblob.com
Sun Jan 28 20:09:15 UTC 2007
I'm experiencing very high and very variable CPU usage from X during DVB
playback with the 'bob' deinterlacer - sometimes X uses a few percent of
the CPU, sometimes it uses nearly 90 percent. I do have cpufreq turned
on with the ondemand governor but this is not enough to explain the
variation I'm seeing (as much as a hundred fold difference in load).
There is no apparent difference in playback quality when the load
changes and the load changes up and down while watching a single
program. Switching deinterlacing off or choosing a different
deinterlacing algorithm results in consistent CPU load.
Does anyone else see this? Is it expected behaviour? I understand that
bob is CPU intensive, but it seems odd that it sometimes takes
practically no CPU and other times it nearly swamps my machine.
My setup is:
AMD Athlon 64 3000+ (1800MHz), 2GB memory, NForce motherboard (6500,
I think?), using built in TV Out to PAL TV
Linux 188.8.131.52, (vanilla kernel, not gentoo kernel)
modular X.Org server (from stable portage)
recent proprietory NVidia drivers (emerge ~x86)
recent MythTV (from SVN a few days ago)
'Standard' output (not XVMC as it seems to crash X and or the front end)
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