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

[jon]

Hi,

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.

Myrinet even says that you can't expect anymore than 100MB/sec-130MB/sec
out of myrinet on 32-bit 33Mhz with the best chipset.

http://www.myrinet.com/myrinet/performance/index.html

They also say system dependencies can provide latencies from 6.5us to
16us.

Anyways, ya, I don't think any P4 system is a great myrinet host.

Thanks,
Jon

> -----Original Message-----
> From: Patrick Geoffray [mailto:patrick at myri.com]
> Sent: Tuesday, December 17, 2002 1:38 AM
> To: jon
> Cc: Beowulf cluster mailing list; becker at scyld.com
> Subject: Re: low-latency high-bandwidth OS bypass user-level messaging
> forcommodity(linux) clusters with commodity NICs(<$200),
HELP!(GAMMA/EMP/M-VIA/etc.)
> 
> Hi Jon,
> 
> On Mon, 2002-12-16 at 05:46, jon wrote:
> 
> > Currently with Myrinet on P4 I get 17us latency and 80MB/sec
bandwidth,
> 
> Throw your machine to the garbage and buy a P4 with a decent chipset,
> IMHO.
> 
> > Why is the OS-bypass so hard?  If wanting no TCP support, isn't it
> > easier than writing standard linux driver? (like you've done a lot!)
> 
> The last time I talked to Pete Wyckoff (SC02), he was not working on
EMP
> anymore. It would be interesting to get his view on the problem (Pete
> ?).
> 
> My 2 cents.
> 
> Patrick
> --
> 
> Patrick Geoffray, Phd
> Myricom, Inc.
> http://www.myri.com