[Beowulf] Maximizing intra-node communication performance

ctierney at hypermall.net ctierney at hypermall.net
Wed Dec 28 16:24:38 EST 2005

Quoting Vincent Diepeveen <diep at xs4all.nl>:

> Are you looking for a hardware solution (so paying money to get some
> great inter-node performance) or searching for a software solution
> that's better than MPI?
> The first costs some money, but with great certainty reduces your
> problem.
> The second will be years of experimental software, bugs and if you're lucky
> it's 1% better. 
> How much improvement do you need and on what area?
> Did you install some SSI type solution also?
> That might be a performance killer.
> Vincent
> At 12:05 27-12-2005 +0200, Tahir Malas wrote:
> >Hi all,
> >Taking advice from a previous discussion, we have purchased an Tyan server
> >with 8 dual-core Opteron 870 processors. Now I want to wonder how I can
> >maximize the intra-node communication of the server. We have been using
> >LAM-MPI, but I think that TCP/IP protocol may degrade the performance. Has
> >anybody tried new implementations of MPI, or anybody knows some other
> >support for intra-node communication?
> >Thanks in advance,
> >Tahir Malas
> >Bilkent University 
> >Electrical and Electronics Engineering Department
> >Phone: +90 312 290 1385 
> >

Does LAM-MPI not have a shared memory device for intra-node
communication?  How about changing your MPI implementation to
one that does?


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