[mythtv-users] SMP Performance

Greg Grotsky spikeygg at gmail.com
Sun Dec 10 21:37:43 UTC 2006

On 12/10/06, Brad DerManouelian <myth at dermanouelian.com> wrote:
> On Dec 10, 2006, at 11:53 AM, Brad DerManouelian wrote:
> > I'm also running 64bit but on FC5 and the nvidia 8776 binary
> > drivers. Right now I'm watching an ABC HD program which I think is
> > 720p and using 96% CPU. 1080i content uses over 100% since it's de-
> > interlacing as well.
> I take that back. I was running a transcode process on one core
> (taking the whole core) and those were my numbers for playback. Now
> the transcode process stopped freeing up my second core and now I'm
> seeing Xorg taking between 90-98% of one core and mythfrontend taking
> 60-63%. This seems especially excessive. I'm having a hard time
> upgrading with ATrpms right now but if I ever figure that out I'll
> try upgrading my nvidia driver and see if it helps.

Brad, I am also outputting to a TV in 1080p and using kernel deint with
nvidia 9629 (recent).  I have looked at my cpu usage several times
throughout the past: on 720p material I see 60-70% cpu usage; 1080i 70-80%,
it might be your nvidia binary... I remember there was one nvidia release
that shot CPU usage through the roof, I think it was in the 6000 series
though.  I update myth to SVN almost weekly, and I run aptitude/deselect
almost monthly to update the rest of the software and stay on the sometimes
painful cutting edge. :)

  Are you running a FC released kernel?  I'm not sure it matters but I'm
using one I built from kernel.org currently, 2.6.19.  It's setup with
exactly the drivers and options that I need.  Make sure you are using nvAGP,
you have to disable the agpgart in your kernel config in order for the
nvidia driver to enable it's own driver.

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