> On Sat, Mar 24, 2007 at 11:08:32AM -0400, Douglas Eadline wrote: > >> You really need two networks for GAMMA as GAMMA turns off TCP >> while in use. Not to difficult with today's GigE-full nodes. >> Just need extra an extra switch. > > I'm familiar with that requirement, yes. > >> > I just got a X2100 M2 machine in today. 4 GBit ports, though 2 of them >> > nVidia. >> >> I was able to get 17 usecond latency (netpipe TCP ) with the nvidia >> links on these systems. Out of the box broadcom was about >> 40 useconds (netpipe TCP). > > Vanilla netpipe, stock Linux kernel?
Nothing special was done. This is a Sun Discovery cluster. It came wired to the nvidia port. I was curious and did some tests. Using Warewulf and RHEL4 to build the cluster. > That's a very good result, > given that GAMMA with Broadcoms is only slightly better. Yes, that what I thought as well (ran netpipe/TCP several times to check it) -- Doug > > -- > Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org > ______________________________________________________________ > ICBM: 48.07100, 11.36820 http://www.ativel.com > 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE > > !DSPAM:46065086300316269018054! > -- Doug _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
