[Beowulf] An annoying MPI problem

Chris Samuel csamuel at vpac.org
Wed Jul 9 21:07:17 EDT 2008


----- "Bruno Coutinho" <coutinho at dcc.ufmg.br> wrote:

> Try disabling shared memory only.
> Open MPI shared memory buffer is limited and it enters deadlock if
> you overflow it.
> As Open MPI uses busy wait, it appears as a livelock.

Interesting - is it possible to disable that at runtime
with one of its billions of configuration options ?

cheers,
Chris
-- 
Christopher Samuel - (03) 9925 4751 - Systems Manager
 The Victorian Partnership for Advanced Computing
 P.O. Box 201, Carlton South, VIC 3053, Australia
VPAC is a not-for-profit Registered Research Agency
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