[mythtv-users] [slightly OT] HDTV cpu

[Steve MacLaren]

On 7/21/07, Steve MacLaren <scram69 at gmail.com> wrote:
>
>
>
> On 7/19/07, Patrick Ouellette <pat at flying-gecko.net> wrote:
> >
> > On Thu, Jul 19, 2007 at 09:04:39AM -0700, Steve MacLaren wrote:
> > >
> > > I'm currently running with the AMD Athlon 64 X2 3600+ for broadcast
> > HDTV
> > > playback.  Having the second core available for commflagging is nice
> > as
> > > during HD playback, Xorg keeps one core between 90 and 100%.
> > >
> > > Unfortunately there are too many boldface "?" on the wiki page to know
> > for
> > > sure if this is the performance one should expect for this
> > CPU.  However the
> > > strange thing is that I see no difference using XvMC or not.  I have
> > an
> > > Nvidia 6200 using the proprietary nvidia drivers (see the nvidia logo
> > during
> > > login).  So my results may not be "typical".
> > >
> >
> > Do you have the xorg.conf option "UseEvents" set to true (if you are
> > using an NVIDIA driver that supports this option?  I know on my single
> > core system this cut CPU usage way down on HD playback.  I'm pondering
> > upgrading to a dual core CPU so the data point would be nice.
> >
> > Pat
> >
> > Thanks for the tip!  I finally was able to give the "UseEvents" option a
> try, and it makes a huge difference using XvMC in CPU usage, for both SD and
> HD playback.  Haven't had a chance to test w/o XvMC yet, but will try that
> as well.
>
> Again thanks for filling me in on "UseEvents".  The Ubuntu how-to that I
> used to set up and install the nvidia drivers made no mention of it...
>
> A follow up - with "UseEvents" and playback of broadcast HD using
"Standard" (ffmpeg), the frontend is using ~65% of one core, and Xorg
another ~10%.  Using "Standard XvMC", the frontend uses... ~65% of one
core.  So my performance is much improved and very manageable for this
particular system, but strangely, I can't seem to see any effect of using
XvMC.
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