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On Wed, Jul 02, 2003 at 12:00:26PM +0200, Bruce Becker wrote:
> Hello OSCAR friends
>=20
> We are about to upgrade and extend our OSCAR cluster (which has been=20
> running quite nicely for about a year). At the moment, we are running=20
> Intel PIV 1.7 GHz machines, operating system is RedHat 7.3 with updates,=
=20
> kernel version 2.4.18-3smp. I want to know if anyone has=20
>=20
> 1) Successfully tested and used OSCAR on RedHat 9 machines, in a=20
> production environment
> 2) Managed to take advantage of the hyper-threading capabilities of the=
=20
> new Intel Xeon chips, specifically the PIV 2.66 GHz processors. We are=20
> looking to buy the D865GBF Intel chipset board.=20
Until the 2.5 / 2.6 kernel schedular changes, hyperthreading isn't very
useful under Linux. It will just see each P4 proc as 2 procs, and treat
them accordingly. For high load jobs, this can actually hurt performance.
In 2.5 / 2.6 Linux becomes much more aware of what is really going on, and
you can get the performance boost from the hyperthreading.
-Sean
--=20
__________________________________________________________________
Sean Dague Mid-Hudson Valley
sean at dague dot net Linux Users Group
http://dague.net http://mhvlug.org
There is no silver bullet. Plus, werewolves make better neighbors
than zombies, and they tend to keep the vampire population down.
__________________________________________________________________
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