low-latency high-bandwidth OS bypass user-level messagingforcommodity(linux) clusters with commodity NICs(<$200),HELP!(GAMMA/EMP/M-VIA/etc.)

[jon]

Hi,
 
> -----Original Message-----
> From: Patrick Geoffray [mailto:patrick at myri.com]
> Sent: Tuesday, December 17, 2002 2:06 AM
> To: jon
> Cc: 'Beowulf cluster mailing list'
> Subject: RE: low-latency high-bandwidth OS bypass user-level
messagingforcommodity(linux)
> clusters with commodity NICs(<$200),HELP!(GAMMA/EMP/M-VIA/etc.)
> 
> Jon,
> 
> On Tue, 2002-12-17 at 02:50, jon wrote:
> > Perhaps the P4 isn't that great, but it's an Intel 850E chipset, not
> > sure that it sucks :)
> >
> > http://usa.asus.com/mb/socket478/p4t533-c/overview.htm is the
> > motherboard.
> >
> 
> It's a PCI 32/33. Nowadays, you can find plenty of P4-based
motherboards
> with correct PCI 64/66, for almost the same price.

[jon] Honestly I couldn't find ANY P4 MB's with 64-bit/66Mhz, let alone
PCI-X.

If you could point one out, that would be fine :)

The Grand Champion's from SuperMicro with 64-bit/66Mhz are all
dual-Xeons.  There's a single-Xeon with 64-bit/33Mhz, and the rest are
P4's with 1 CPU and are all 32-bit 33Mhz.

The point is the Intel 845 and Intel 850 are for use with P4, least
SuperMicro's, even the E7205 based P4 is 32-bit 33Mhz with the P4.

> > Anyways, ya, I don't think any P4 system is a great myrinet host.
> 
> The hot machines today are P4-based, using the Serverworks
GrandChampion
> (GC) or Intel E7500 (Plumas) chipsets. They provide PCI 64/66 (even
> PCI-X) and are available from many vendors. All of the Intel i8x0
> chipset are just **** regarding PCI performance.
> 
> All the machines we bought recently were Supermicro motherboards with
> Serverworks GC-LE chipsets. Works great.

[jon] And they have P4 Xeons, right? :)  Not Pure P4's.
[jon]