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

[Douglas Eadline]

On Wed, 18 Dec 2002, Markus Fischer wrote:

> unfortunately the web site does not mention whether
> it was streaming or round trip measurements.

good point, fixed that on the page, for your reference:

We used

NPtcp -t -h receive_node -o netpipe.data -O

on the sender and

NPtcp -r on the receiver."

Doug

> 
> One can assume the streaming (-s) option, though.
> The latency is pretty good. Typically only achieved
> when running in direct mode over GigEth without
> the stack.
> 
> Jeff Layton wrote:
> 
> >>A good example is easy to find: the Intel GigE NIC series has added
> >>about a half dozen new PCI IDs in the past year.  Not just revision
> >>numbers, which we don't track, but the major ID number.  Some of those
> >>new versions appear to have significant changes in the feature set and
> >>in the way they handle small packets to reduce latency.
> >>    
> >>
> >
> >I'm not sure what NICS these are, but I just found some good
> >numbers for GigE NICs:
> >
> >http://www.plogic.com/ll-gige.html
> >
> >They look pretty darn good!
> >
> >
> >Jeff
> >
> >
> >  
> >
> >>That's a life cycle of about three months, which is shorter than the
> >>time to decide a device driver is stable.
> >>
> >>--
> >>Donald Becker                           becker at scyld.com
> >>Scyld Computing Corporation            http://www.scyld.com
> >>410 Severn Ave. Suite 210               Scyld Beowulf cluster system
> >>Annapolis MD 21403                      410-990-9993
> >>
> >>_______________________________________________
> >>Beowulf mailing list, Beowulf at beowulf.org
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> >>    
> >>
> >
> >--
> >
> >Jeff Layton
> >Senior Engineer
> >Lockheed-Martin Aeronautical Company - Marietta
> >Aerodynamics & CFD
> >
> >"Is it possible to overclock a cattle prod?" - Irv Mullins
> >
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> >
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> >  
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> 
> 
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