On Thu, 19 Jan 2017 14:49:24 +0200 Graham Inggs <gin...@debian.org> wrote: > Alternatively, add the '--oversubscribe' option to the mpirun command > line, i.e.: > > mpirun --map-by socket:OVERSUBSCRIBE -np 4 python -c "print 'hello'"
Here you meant mpirun --oversubscribe -np 4 python -c "print 'hello'" But the ability to oversubscribe doesn't explain the bug here. Why does openmpi think only 2 slots are available when in fact 4 processors are available? Drew