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Re: Sched M2 vs BSD on UP

Hi folks,

On Tue, Apr 29, 2008 at 02:09:05PM +0100, Andrew Doran wrote:
> On Tue, Apr 29, 2008 at 01:46:06PM +0200, wrote:
> > I am currently recompiling the userland on my old laptop and I'm wondering 
> > if I
> > did well switching the kernel from SCHED_BSD44 to SCHED_M2. The machine 
> > seems to
> > hiccup, especially (I think) when doing concurrent disk accesses.
> > 
> > Theorically, is there any gain to be hoped switching from BSD44 to M2 on a 
> > UP
> > machine?
> SCHED_4BSD is still the default, it is just the run queue management that
> changed. It has no effect on a UP system.

i noticed the effect too on my MP hyperthreaded P4, but *only* when the 
harddisc was mounted synchronously. When mounted async or with softdep the 
effect is gone...

With regards,

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