Re: [BUG] 2.4 VM sucks. Again

Austin Gonyou
2002-05-27T23:08:58Z

Just to clarify, it was Sparc v. x86. (which is what I meant to state in
my first sentence there. :)

On Mon, 2002-05-27 at 17:24, Austin Gonyou wrote:
> I'm not referring to just *non* x86 arches in this case. Sorry about
> that. Any setup can be non-monolithic, but the measurement to decide if
> it is cost worthy is price/performance ratio.
>
> I'm not saying that "if it's not x86, it's monolithic", in the context
> of the discussion, it's really about large costly boxes, designed to be
> large, costly boxes. That, from this perspective, is monolithic.
>
>
> On Mon, 2002-05-27 at 04:24, Marco Colombo wrote:
> > On 24 May 2002, Austin Gonyou wrote:
> >
> > > On Fri, 2002-05-24 at 11:31, Martin J. Bligh wrote:
> > > > >> I'm not sure exactly what Roy was doing, but we were taking a machine
> > > > >> with 16Gb of RAM, and reading files into the page cache - I think we built up
> > > > >> 8 million buffer_heads according to slabinfo ... on a P4 they're 128 bytes each,
> > > > >> on a P3 96 bytes.
> > > > >
> > > > > The buffer heads one would make sense. I only test on realistic sized systems.
> > > >
> > > > Well, it'll still waste valuable memory there too, though you may not totally kill it.
> > > >
> > > > > Once you pass 4Gb there are so many problems its not worth using x86 in the
> > > > > long run
> > > >
> > > I assume that you mean by "not worth using x86" you're referring to say,
> > > degraded performance over other platforms? Well...if you talk
> > > price/performance, using x86 is perfect in those terms since you can buy
> > > more boxes and have a more fluid architecture, rather than building a
> > > monolithic system. Monolithic systems aren't always the best. Just look
> > > at Fermilab!
> >
> > Uh? There are many alpha-based clusters out there. Why do you think
> > !x86 == monolithic?
> >
> > .TM.
> > --
> > ____/ ____/ /
> > / / / Marco Colombo
> > ___/ ___ / / Technical Manager
> > / / / ESI s.r.l.
> > _____/ _____/ _/ Colombo@ESI.it
> >
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