Subject: Re: hyperthreading performances
To: Alan Post <email@example.com>
From: Manuel Bouyer <firstname.lastname@example.org>
Date: 07/26/2004 20:00:32
On Mon, Jul 26, 2004 at 11:58:40AM +0000, Alan Post wrote:
> In article <20040726102903.GA21256@antioche.lip6.fr>, Manuel Bouyer wrote:
> > I've done a simple performance test of a PVI-HT, to see the benefit
> > of hyperthreading.
> > NetBSD borneo.lip6.fr 2.0_BETA NetBSD 2.0_BETA (GENERIC) #1: ...
> > NetBSD borneo.lip6.fr 2.0_BETA NetBSD 2.0_BETA (P4P800) #1: ...
> > This may be the reason why NetBSD see an improvement with HT while
> > linux sees a slowdown, and I suspect this is related to fine-grained
> > locking vs biglock.
> Could there also be a GENERIC vs non-bloated kernel effect?
I don't think so. P4P800 is in fact GENERIC.MP without
MPBIOS, and with acpi and MPACPI. P4P800 should be as bloated as GENERIC is.
You could argue that fedora is even more bloated :)
Manuel Bouyer <email@example.com>
NetBSD: 26 ans d'experience feront toujours la difference