[Beowulf] IB problem/using IB diagnostics

Greg Keller Greg at keller.net
Thu Jun 18 15:29:06 EDT 2009

On Jun 18, 2009, at 12:51 PM, beowulf-request at beowulf.org wrote:

> Message: 4
> Date: Thu, 18 Jun 2009 11:20:47 -0400
> From: Prentice Bisbal <prentice at ias.edu>

> One of my nodes has an IB problem:
> --------------------------------------------------------------------------
> WARNING: There is at least on IB HCA found on host 'node36.aurora',  
> but
> there is
> no active ports detected. This is most certainly not what you wanted.
> Check your cables and SM configuration.
> --------------------------------------------------------------------------

Does the output of vstat or ibstat show the port active and at the  
line rate you expect?
does perfquery show packet traffic?

This looks like a problem we saw when the software stack on one of our  
nodes was bad, any chance of "bit creep" in your environment where the  
installation is incomplete or are you confident it's identical to the  
working nodes?

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