[mythtv-users] New FE machine feedback and Q's
bfoddy at visi.com
Tue Mar 27 01:26:47 UTC 2007
On Sunday 25 March 2007 11:27 pm, Paul Bender wrote:
> > Now for the questions:
> > 1. Anyone found the best settings for the cpu scaling drivers?
> > I've been playing with using "conservative" and "ondemand" governors,
> > generally conservative works better as ondemand jumps the speed all
> > around. But even conservative has problems with 1 heavy cpu load on a 2
> > cpu/dual core box. If both cpu's are busy, it works much more
> > predictable. What I'd like to see is if a single process uses > 80% (for
> > instance), it should speed up to the next step, < 30% slow down. But I
> > find it goes long periods of time with 1 process at or near 100% and the
> > other processor idle. Especially playback HD content. So most of the
> > time on conservative, it plays HD at the slowest 1000Mhz setting, it does
> > it barely, but going to 1800 would make much more comfortable. I've
> > played with changing
> > the /sys/devices/system/cpu/cpu0/cpufreq/conservative tunable params,
> > but haven't found a good combo yet. Anyone have settings they really
> > like?
> Is there any reason to have a dual core CPU? I have an Athlon64 3200+
> and it is more than enough to playback HD without XvMC.
I'm sure a single 3200 would more than do it in most cases, as my X2
can usually play HD running at 1/2 cpu freq. But as my papa always
taught me, "Never send a boy to do a man's job". For the price diff,
it just gave me a lot more breathing room.
> > 2. Speaking of HD playback, playing Lost on ABC (720p), the X server
> > takes almost 100% of 1 cpu (even at fastest cpu speed), while
> > mythfrontend takes only 30%. But a CBS/NBC show (1080i), the Xserver
> > takes almost nothing, and the mythfrontend takes ~30-40% (fast cpu). But
> > strangely the video resolution is set to 720p. I haven't gotten the
> > output up to 1080i or 540p yet (more work on that one), but I find it
> > very strange that it works much harder when the content and video
> > resolution match. Anyone have any clues why, or settings to look for
> > solutions?
> Try adding
> Option "UseEvents" "true"
> to the nvidia driver device section of your xorg.conf file.
That did it. I'll have to look up what that command does, but for
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