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| CPU allocation problem? http://forums.linhes.org/viewtopic.php?f=14&t=13772 |
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| Author: | richwine4 [ Tue Jan 23, 2007 10:09 am ] |
| Post subject: | CPU allocation problem? |
This may be an especially noobie-type question, so I apologize in advance. When I play 1080i using the standard MPEG2 decoder (XvMC turned off), the video plays fine for about 1 minute, but then becomes very choppy. Using the top command to monitor CPU usage, I see that the CPU% allocated to the frontend jumps from about 60% to 99.9% at the same time that the video becomes choppy. What I don't understand is that the overall CPU usage indicator, above all of the other processes, never goes above 50%. What does this mean? How can a single process be using more CPU than the total? Is it possible that the frontend is prevented from using more than half the CPU? I have a P4 3.2 Ghz HT and an evga 7600GS. |
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| Author: | tjc [ Tue Jan 23, 2007 8:45 pm ] |
| Post subject: | |
HT processors are treated as multiple cores. You're using 99.xxx% of one "CPU" but the other one isn't doing that much. You don't really get 200% with a HT CPU, especially in cases like this, but it's a reasonable approximation. |
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| Author: | richwine4 [ Wed Jan 24, 2007 7:55 am ] |
| Post subject: | |
Thanks, tjc. That's helpful. I assume then that I'm getting as much CPU usage as I can with mythtv, and that there's no way to "spread" mythtv over multiple threads? |
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