On Tue, 1 Oct 2002, Daniel Phillips wrote:
> On Tuesday 01 October 2002 19:13, Rik van Riel wrote:
> > With one process that needs 150% of RAM as its working set,
> > there simply is no way to win.
>
> True, the object is merely to suck as little as possible. Note that
> 2.4.xx trounces 2.5.xx rather soundly on the test in question.
Every page replacement system has a worst case, 2.5 is closer to
LRU than 2.4 and it's well possible that the randomisation 2.4
does means we don't trigger the worst case here.
I don't know for sure, but I have a feeling that EVERY algorithm
for page replacement can be tricked into performing worse than
random page replacement for some particular workload. It might
even be provable ;)
> > > Try loading a high res photo in gimp and running any kind of interesting
> > > script-fu on it. If it doesn't thrash, boot with half the memory and
> > > repeat.
> >
> > But, should just the gimp thrash, or should every process on the
> > machine thrash ?
>
> Gimp should thrash exactly as much as it needs to, to get its job
> done. No competition, remember?
No competition ? I know _I_ don't have a machine dedicated to
gimp and I like to be able to continue listening to mp3s while
the gimp is chewing on a large image...
cheers,
Rik
-- A: No. Q: Should I include quotations after my reply?http://www.surriel.com/ http://distro.conectiva.com/
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