Ubuntu
linux package

  1. Bug #107545
  2. Comment #25

Comment 25 for bug 107545

Revision history for this message
Oliver Joos (oliver-joos) wrote :

To verify if CPU scheduling is your problem you could try "cpuburn". Commands in this package are: burnP6, burnK7, ect. (optimized for different CPU types) and they just waste CPU cycles. Run your test-app with higher prio together with burnXY:

$ burnP6 &
$ sudo nice -1 wine CoD4

If your test app shows much more or less(!) jitter than when running alone, then there is a problem with CPU scheduling and/or power-saving on your system. If it does not make a big difference, then it is more likely a problem with the video driver, DMA transfers or similar.

About me: I am not a Linux kernel guru. Me too, I just saw these CPU scaling issues since Hardy. Here they were gone since Jaunty final. But I am glad to help finding the cause or solutions for systems which are still affected.