interconnect latency, disected.
hahn at physics.mcmaster.ca
Sun Jun 29 12:37:45 EDT 2003
does anyone have references handy for recent work on interconnect latency?
specifically, I'm noticing two things:
- many of the papers I see that contrast IB with GBE seem to
claim that GBE latency is much larger than I measure (20-30 us).
- I haven't found any recent studies on where even 25 us of
GBE latency comes from. I recall a really great study from years
ago that broke a single tx/rx down into an explicit timeline,
but that was for ~100 MIP CPUs and 100bT, I think.
- are there current/active efforts to use something other than
TCP for implementing the usual MPI primitives? I'd love to see
something that used ethernet's broad/multicast support, for instance.
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
More information about the Beowulf