Re: O(1) scheduler starvation

[Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>]

On Wed, 2003-06-18 at 17:54, Mike Galbraith wrote:
> >To make XMMS skip, just force the X server to do a lot of repainting,
> >for example, by dragging a big window slowly enough over another one
> >which requires a lot of painting (Evolution, for example, is a good
> >candidate as it requires a lot of CPU to repaint uncovered areas). It's
> >easy to reproduce just after launching XMMS. However, after a while, it
> >gets difficult to make XMMS to skip sound (it seems the scheduler
> >adjusts priorities well enough). This is on a PIII 700Mhz laptop with no
> >niced processes at all.
> 
> Thanks.  I don't have evolution on my linux box (pine/vi/procmail 
> rules).  ImageMagic ought to give X more than enough spurts of frenetic 
> activity though.  Do you have that, and does image manipulation make xmms 
> stutter as well?  Just moving windows around and changing backgrounds 
> doesn't do anything here.  (500mhz piii/128mb ram btw)

In fact, I can only make XMMS skip sound for a very brief period, just
after starting it up. After a few seconds, it seems the dynamic
priorities are adjusted and I can't make XMMS skip sound anymore. To
reproduce it, open up a big window, then launch XMMS and make it play
some MP3 file. Then, start moving the big window around. For me, this
causes XMMS to skip sound for a brief period of time (~5 seconds,
approx).