> -----Original Message-----
> From: lam-bounces_at_[hidden]
> [mailto:lam-bounces_at_[hidden]] On Behalf Of Fco. Javier Ridruejo
> Sent: Thursday, June 08, 2006 12:41 PM
> To: lam_at_[hidden]
> Subject: LAM: UDP messaging
>
> I would like to know if it is possible that the only protocol
> used among MPI
> running applications could be UDP.
Yes, this is possible. Use the "-ssi rpi lamd" option to mpirun (note
that lamboot, however, will still use TCP during its setup phase).
Note, however, that this option will definitely give you lower
performance than using the TCP connections -- see the FAQ for more
information about this.
> I wonder if lamd daemons interchange MPI messages using UDP.
They already do (i.e., all lamd-to-lamd communication uses UDP).
> We are working in a interconnection network simulator for MPP (massive
> parallel processors), and we are testing our simulator with
> real traffic
> coming from MPI applications simulated in a Simics full
> platform simulator.
Excellent; let us know what you find.
--
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems
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