[mythtv-users] [OT] nvidia 8756: XvMC works!

Robert Tsai rtsai1111 at comcast.net
Sun Apr 9 00:29:56 UTC 2006


On Sat, Apr 08, 2006 at 03:08:21PM -0700, Joe Votour wrote:
> Actually, mythfrontend is eating up my CPU - and lots of it.
> Depending on which channel/show I'm watching, mythfrontend eats
> anywhere between 30 and 90+% (usually hovers around 70%) of the CPU
> and around 50% of my memory.  X eats up about 8-22% of my CPU, and
> after that, the most that happens (which changes) is about 6%, which
> goes to mythbackend.  (Note that not all tasks always run at their
> maximums, otherwise, obviously I'm at greater than 100% all the
> time.)
> 
> Idle constantly changes (of course), but it gets to 0% very often.
> I think that the only reason why this works as well as it does is
> because the wait percentage is usually hovering between 10 and 20%.
> My load numbers are relatively high (4.53, 2.87, 1.31).
> 
> I'm a decent programmer, but I can't read "top" for crap.  One of
> these days I'll sit down to figure it out.
> 
> That said, if excessive amounts of disk activity occur, I get
> choppiness and sometimes prebuffering pauses.  Scrolling through the
> guide when watching ATSC (digital or HD) is completely unbearable.
> 
> Here's the specs of my machine:
> Athlon64 3200+
> 512MB of RAM (DDR333 or DDR400, I don't remember)
> 250GB hard drive (ext3 for the root partition, XFS for
> the MythTV storage partition)
> SiS755 chipset
> 1x PVR-250
> 1x PVR-350
> 1x FusionHDTV 5 Lite
> 5200FX using nVidia driver 7676
> Fedora Core 4 with ATrpms, except for MythTV itself
> MythTV SVN 0.19.20060226-1 (a fairly oldish build, I
> admit)
> I'm using ffmpeg (not libmpeg),I have OpenGL vsync on
> and Bob deinterlacing enabled.  XvMC is disabled.
> 
> If you've got any ideas that can help me get this
> working, that would be great, since it would save me
> some money on a new CPU and motherboard.

Try turning off OpenGL vsync (either compile it out, or via run-time
configuration in TV Playback). On my system that makes CPU usage go
down.

--Rob
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