Re: PROBLEM: Preemptible kernel makes mpg123 skip a lot under 2.6.0-testing7and very high load average under low usage.

[Dru]

Con Kolivas wrote:

> Hi.
>
> I quote from your output:
>
>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> 22953 andru     15   0 10100 5316 9464 S  3.7  0.6   2:02.39 mpg123
> 1067 root       5 -10  595m  58m 539m S  3.3  6.6 391:41.29 XFree86
> 1176 andru     15   0 47488  26m  13m S  1.0  3.0  11:52.32 gnome-terminal
> 25063 root      17   0  2004 1096 1792 R  0.7  0.1   0:00.03 top
>
> The kernel is now tuned to give much more priority to reniced tasks and it is 
> not recommended to run your X server nice -10. This is the cause of your 
> problem as X is starving your audio application. Some distributions do this 
> by default to get around the limitations of the old cpu scheduler not being 
> able to make X smooth enough at nice 0. This hack/workaround is no longer 
> recommended for 2.6 kernels. You will find nice performance of X at nice 0 
> now and audio will not skip when the nice value of X is the same as your 
> audio application.
>
> Con
>  

Your right about the X server. I've reniced it and changed its init 
scripts to run it at a priority of 0
and it runs smoothly now without problems.


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