Messages in this thread |  | | Date | Wed, 17 Oct 2001 13:19:07 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: VM test on 2.4.13-pre3aa1 (compared to 2.4.12-aa1 and 2.4.13-pre2aa1) |
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On Wed, 17 Oct 2001, Linus Torvalds wrote:
> In article <20011017004839.A15996@earthlink.net>, <rwhron@earthlink.net> wrote: > >> > >> So I'd suggest to try again after "echo 4 > /proc/sys/vm/page-cluster" > >> to see if it makes any difference. > >> > >> Andrea > > > >You Rule! > > > >The tweak to page-cluster is basically magic for this test. > > > >With page-cluster=4, the mp3blaster sputtered like 2.4.13pre2aa1. > >Better, but not beautiful. > > > >Real beauty happens with page-cluster=2. There is virtually no sputter. > >And the wall clock time is a little better than 2.4.13pre2aa1! > > This is good information. > > The problem is that "page-cluster" is actually used for two different > things: it's used for mmap page-in clustering, and it's used for swap > page-in clustering, and they probably have rather different behaviours.
Its also used to limit the number of on flight swapouts. That different meaning thingie sucks: I would say we need to separate that :)
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