As far as I remember PVM has some overhead to facilitate message passing in a heterogenous environment that MPI does not have.
I had a customers sample code that required some data to be moved from the headnode to a compute node and while on PVM they would get about 50MB/s MPI could transfer about 100MB/s across gigabit ethernet. Michael -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Hahn Sent: Tuesday, April 10, 2007 1:29 PM To: Robert G. Brown Cc: Beowulf Mailing List Subject: Re: [Beowulf] Win64 Clusters!!!!!!!!!!!! > It was PVM that enabled true message passing parallel code to be > written that made a pile of machines (be they Alphas, simple PCs, Sun I'm not disagreeing, but wonder why PVM is basically extinct now. that is, why was MPI considered an improvement/replacement? > MS knifed IBM over OS/2 (which was a decently designed OS that might > have given Unix a real run for its money) and hence lost out on all > the I worked on OS/2, and it was no peach on the inside, so to speak ;) it's hard to speculate about what-ifs on a system which had barely shaken off its initial hw target (12 MHz 286!) by the time it was dropped. _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
