On 11/23/2011 1:45 PM, Lukas Razik wrote:

TERRY DONTJE <terry.dontje@oracle.com> wrote

Can you build OMPI as a 32 bit library and see if that works any better?

So you mean I shall leave the whole OFED stack as 64 bit and build only openmpi as 32 bit?

I believe the OFED user libraries will need to be 32 bit also or the 32 bit MPI libraries will not be able to use them.

How must I configure openmpi that it'll be definitely built as 32bit?

You need to change the CFLAGS, CXXFLAGS, FFLAGS and FCFLAGS in the configure line such that you replace "-m64" with "-m32" or just "-m32" if "-m64" is not there?

Regards,
Lukas

Terry D. Dontje | Principal Software Engineer

Developer Tools Engineering | +1.781.442.2631
Oracle - Performance Technologies
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Email terry.dontje@oracle.com