[mythtv-users] High CPU Usuage

MacNean C. Tyrrell dardack at nycap.rr.com
Wed Aug 25 23:21:29 EDT 2004


MacNean C. Tyrrell wrote:

> So when i boot my system everything is fine and dandy, but over time 
> mythfrontend seems to use a lot of CPU.  I have a celeron 2gig and a 
> pvr250.  The back end while recording uses very little.  But as soon 
> as mythfrontend starts it's using between 19-22% of the cpu while 
> doing nothing.  If i watch a recording it starts another thread that 
> runs about 68%.  So i have two mythfrontend threads running using 90%, 
> between the system usage and mythbackend recording, my idle drops to 0 
> and i get pauses and such.  If i reboot i don't seem to have much of a 
> problem, but time goes on it happens again.  I don't get it.  I have 
> an sis 315 card and am using the Thomas Winshhofer driver that has XV 
> enabled.  I checked with xvinfo.  Dma is enabled.  It's really 
> frustrating.
> I can probably definetly say that the pauses or jumpy video at times 
> is due to lost frames during playback due to high cpu usage.  I just 
> don't understand why there are two threads and why they are so high in 
> cpu usage.  I appreciate any help here.
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Well I'm gonna leave it on live tv all nite and see where it's at in the 
morning. 

Also i read somewhere that if you fast forward or rewind than hit pause 
that it can cause the ivtv driver to mess up?  Is this true.  Cause that 
could have been the cause.  Right now after a fresh reboot the one 
thread of mythfrontend is 2%, the second is 55% and mythbackend is 2%, 
and I'm watching blade runner on spike tv.  I'll report my cpu usage in 
the morning.  Hopefully someone has some suggestions for me.  I get 
annoyed that i have to reboot like every couple days.  I know that this 
isn't right.  Sorry about 3 posts without waiting for a reply, just 
wanted to get out as much info as possible.  Thanks again.


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