On Monday, 18 September 2006 13:02, Stefan Seyfried wrote:
> On Mon, Sep 18, 2006 at 12:01:05PM +0200, Pavel Machek wrote:
> > Hi!
> >
> > > > I think performance shouldn't be hurt, since we're still batching
> > > > pages 1% at a time, down from 20%. A normal image has 10's of
> > > > thousands of pages (mine 512M laptop is ~55000 pages, for example) so
> > > > 1% is still~500 pages or ~2M at a time.
>
> > Well, patch does not look too bad to me, but...
> >
> > "It is an option, so it is not important to get it right" is ugly. It
> > would be nice to actually benchmark this, and hardcode the option that
> > provides acceptable performance...
>
> I actually have a pretty bad machine wrt. writeout behavior here (hp nx5000),
> so i will test this.
> early writeout is right now about ~4-5 seconds faster (it takes ~6-8 seconds
> to do the final sync without early writeout).
>
> But this machine also is not really faster with compression enabled. With
> compression enabled, i get a flickering disk led during write, without it
> is solid on. Since it is a Pentium M 1400, CPU speed should be fast enough
> to benefit from compression.
Well, what kind of RAM is there is this box?
Also, do you observe any comrpession-related resume speedup?
> It also was always dog slow with in-kernel suspend.
Have you tried the latest -mm?
--
You never change things by fighting the existing reality.
R. Buckminster Fuller
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