Re: [O-MPI users] Configuring port

2005-11-22 Thread Jeff Squyres
On Nov 21, 2005, at 4:44 PM, Enrique Curchitser wrote: OK, I'll take you up on the offer. I have 4 Power Mac G5's on a private network connected through a GigE switch. Even for large problems the communications are slugish. This same code has shown to scale to upwards of 128 processors on

Re: [O-MPI users] Configuring port

2005-11-21 Thread Enrique Curchitser
OK, I'll take you up on the offer. I have 4 Power Mac G5's on a private network connected through a GigE switch. Even for large problems the communications are slugish. This same code has shown to scale to upwards of 128 processors on IBM SP's. So here is the output to ompi_info --param bt

Re: [O-MPI users] Configuring port

2005-11-19 Thread Jeff Squyres
Enrique -- I also recently added a section to the FAQ about TCP optimization. It's a bit sparse at the moment, but please feel free to pester us with questions -- whenever we see good questions, we add them to the FAQ! http://www.open-mpi.org/faq/?category=tuning http://www.open-mpi.org/faq/

Re: [O-MPI users] Configuring port

2005-11-16 Thread Enrique Curchitser
Thank you. It did the trick! Now on to optimizing the communications over gig-ethernet. _ Enrique Curchitser ec...@columbia.edu On Nov 16, 2005, at 4:29 PM, Troy Telford wrote: On Wed, 16 Nov 2005 14:16:20 -0700, Enrique Curchitser wrote: Hi, I put together a small clu

Re: [O-MPI users] Configuring port

2005-11-16 Thread Troy Telford
On Wed, 16 Nov 2005 14:16:20 -0700, Enrique Curchitser wrote: Hi, I put together a small cluster (4 computers) which has one head node that sees the world and 3 that are on a private network. If I want to use the head node (which has 2 NICs) as part of the ring, how do I tell it to go over th

[O-MPI users] Configuring port

2005-11-16 Thread Enrique Curchitser
Hi, I put together a small cluster (4 computers) which has one head node that sees the world and 3 that are on a private network. If I want to use the head node (which has 2 NICs) as part of the ring, how do I tell it to go over the NIC that is part of the private network? In mpich, there