Re: Scheduler weirdness

From: Steve Kargl <sgk_at_troutmask.apl.washington.edu>
Date: Sun, 11 Oct 2009 21:33:58 -0700
On Mon, Oct 12, 2009 at 01:49:27PM +1100, Alex R wrote:
> Steve Kargl wrote:
> >So, you have 4 cpus and 4 folding-at-home processes and you're
> >trying to use the system with other apps?  Switch to 4BSD.
> >
> >  
> 
> I thought SCHED_ULE was meant to be a much better choice under an SMP 
> environment. Why are you suggesting he rebuild his kernel and use the 
> legacy scheduler?
> 

If you have N cpus and N+1 numerical intensitive applications,
ULE may have poor performance compared to 4BSD.   In OP's case,
he has 4 cpus and 4 numerical intensity (?) applications.  He,
however, also is trying to use the system in some interactive
way.

-- 
Steve
Received on Mon Oct 12 2009 - 02:33:59 UTC

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