[Beowulf] mpi slow pairs

[Greg Lindahl]

On Fri, Aug 29, 2014 at 11:30:09AM -0400, Michael Di Domenico wrote:

> > Also have you run  ibdiagnet to see if anything is flagged up?
> 
> i've run a multitude of ib diags on the machines, but nothing is
> popping out as wrong.  what's weird is that it's only certain pairing
> of machines not any one machine in general.

Huh, Intel (PathScale/QLogic) has shipped a NxN debugging program for
more than a decade. The first vendor I recall shipping such a program
was Microway. I guess it takes a while for good practices to spread
throughout our community!

-- greg