[Linux-ia64] Re: web page on O(1) scheduler

Rik van Riel
2003-05-22T00:38:56Z

On Wed, 21 May 2003, Mike Galbraith wrote:
> At 11:49 PM 5/20/2003 -0700, David Mosberger wrote:
> >Recently, I started to look into some odd performance behaviors of the
> >O(1) scheduler. I decided to document what I found in a web page
> >at:
> >
> > http://www.hpl.hp.com/research/linux/kernel/o1.php
>
> The page mentions persistent starvation. My own explorations of this
> issue indicate that the primary source is always selecting the highest
> priority queue.

It's deeper than that. The O(1) scheduler doesn't consider
actual CPU usage as a factor of CPU priority.

Rik
--
Engineers don't grow up, they grow sideways.
http://www.surriel.com/ http://kernelnewbies.org/