swap performance under 6.1

[Kris Kennaway]

On Wed, Apr 12, 2006 at 09:55:00PM +0000, David E. Cross wrote:
> Yes, I wouldn't be at all surprised to find out that my 6.1 partition
> has a bad block in .. say.. libc that's delaying reads and causing me
> trouble, I just remember installing 6.1 and thinking "OUCH".
> 
> I get the impression that this is a latency issue more then a bandwidth
> issue (responsiveness vs performance).  so I think that any long running
> test to see how effecitvely we swap isn't going to show anything.
> 
> I could totally re-partition and get 4.x, 5.x and 6.x all on
> concurrently if that would help.  But I think I would need a good test
> program to have waiting in the wings to quantitatively measure the
> differences; anyone have any ideas?

The stress2 suite (www.holm.cc/stress) has a utility that is designed
to stress this, you could check relative performance (after making
sure it's deterministic).

Kris
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