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Subject: Re: [OMPI users] Number of Sockets used by OpenMPI
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-11-15 11:41:22

On Nov 13, 2009, at 6:14 PM, Charles Salvia wrote:

> I am using OMPI 1.3.3.
> I didn't realize that earlier versions may behave differently. Is
> there perhaps an advantage/disadvantage to using 1 socket to connect
> to each process, versus 2 sockets (one for sending and one for
> receiving)?

Not really. There's still only 1 network wire. The kernel already
has separate sending and receiving buffers for a single socket.
Adding another socket would just consume more kernel resources.

Jeff Squyres