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From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2003-09-27 15:11:03


On Sat, 27 Sep 2003, Richard Drake wrote:

> Following is the result of laminfo. I did find and use GM with
> configure: --with-gm=/usr/gm-1.5.2.1_Linux-2.4.18-4smp

Excellent.

> Does this mean that by default, MPI programs will use the native Myrinet
> interfaces (when, say, using straight "lamboot" on a PBS scheduled
> process)? Or does one need to do something special to get the native
> Myrinet to be used?

It should do it by default -- LAM tries to pick the "best" communications
device by default. You can verify this by either:

1) Use "-ssi rpi gm" as arguments to mpirun, which forces the use of the
gm module.

2) Use "-ssi rpi_verbose level:1000" as arguments to mpirun, and you can
see if the gm module was selected to be used (it should be).

-- 
{+} Jeff Squyres
{+} jsquyres_at_[hidden]
{+} http://www.lam-mpi.org/