Hi,

I'm trying to run a model-free calculation in relax 2.2.3 on a cluster, set up 
with mpi4py and Open MPI as described in the documentation. I ran the job with 
64 cores, and this was successfully picked up by the software:

Processor fabric: MPI 2.1 running via mpi4py with 63 space processors & 1 
master. Using Open MPI 1.4.1.

However, when the job finished an analysis of the CPU time used showed that 
only 11 or 12 cores were actually being used for computations, which I presume 
correlates with the number of cores per node. Indeed, when I ran another test 
using 12 cores over nodes containing 4 cores, only 3 cores were active during 
the calculation.

Is there an error in my set up, or is this some kind of bug?

Best wishes,

Chris Waudby

[email protected]

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