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Date: Fri, 16 Sep 2005 18:49:11 +0200
From: Oliver Lehmann <lehmann@ans-netz.de>
To: joseph.koshy@gmail.com
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Subject: Re: low(er) disk performance with sched_4bsd then with sched_ule
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Joseph Koshy wrote:

> I'm just not able to reproduce this kind of skewed
> profile on -current on a uniprocessor amd64 and
> on a P4 HT machine.

I remember that when I tried w/o SMP it was much faster with 4bsd then it
was with SMP (4BSd-UP was about the same as ULE with SMP). That was the
point why I tried SMP with ULE - because I hoped to get the performance
back I lost with switching from UP to SMP with 4BSD.

> Just as an off-chance: how upto-date is your kernel?  In 
> particular, do you have the following fix: 
> 
> "sys/vm/vm_pager.c:"
>  revision 1.105.2.1

I've 1.105 - I'll cvsup my 6_RELENG and report back if anything changed.


-- 
 Oliver Lehmann
  http://www.pofo.de/
  http://wishlist.ans-netz.de/