swap performance under 6.1

[Kris Kennaway]

On Wed, Apr 12, 2006 at 01:36:43PM -0400, Garance A Drosihn wrote:
> At 12:03 AM -0400 4/12/06, Kris Kennaway wrote:
> >On Tue, Apr 11, 2006 at 10:43:32PM +0000, David E. Cross wrote:
> >> I saw under http://www.freebsd.org/releases/6.1R/todo.html  that swap
> >> performance under 6.x is slower then 4.X, and this is listed as "not
> >> done".
> >>
> > > I noticed that 6.1 seemed to be a dog, but 6.0 I thought
> > > was better.  As a test I installed 6.0 and 6.1 in parallel
> > > on my laptop with identical ports trees (and packages)
> 
> Note...
> 
> > > and 6.0 does feel a lot more responisve to swapping; I would
> > > be eager to help track this down if someone could give me
> > > some pointers.  If I have to _guess_ as to a problem it would
> > > seem like some of the scheduling priorities changed.
> >
> >I didn't think this was a 6.1 regression compared to 6.0,
> >but 6.x compared to 4.x.  It would be good to try and
> >quantify any performance differences here - so far it's
> >just a bunch of people's subjective opinions (including
> >mine) after upgrading from 4.x.
> 
> In Dave's case, the tests are explicitly 6.0-release vs
> 6.1- at april-5th.  Those are the two installations he has on
> his laptop, which he is comparing to each other via dual-
> booting.  The thing is, he's not sure how to get the numbers
> to back up the performance "feel" that he's experiencing.

Thanks, I did read his email :-)

My point was that the problem was not believed to exist in that
situation, so it's even more surprising and needs further
investigation to be sure.

Kris
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