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See [[OpenMPI#Linux_and_Mac]]
<source lang="bash">
mpirun --report-bindings -np 11 relax --multi='mpi4py'4 echo "hello world"
mpirun --report-bindings -np 2 relax --multi='mpi4py'
Traceback (most recent call last):
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/bin/relax", line 7, in <module>
relax.start(profile_flag=False)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/relax.py", line 114, in start
processor = load_multiprocessor(relax.multiprocessor_type, callbacks, processor_size=relax.n_processors, verbosity=verbosity)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/__init__.py", line 189, in load_multiprocessor
object = clazz(callback=callback, processor_size=processor_size)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/mpi4py_processor.py", line 56, in __init__
raise Too_few_slaves_exception()
multi.multi_processor_base.Too_few_slaves_exception: master slave processing requires at least 2 processors to run you only provided 1, exiting....
Traceback (most recent call last):
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/bin/relax", line 7, in <module>
relax.start(profile_flag=False)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/relax.py", line 114, in start
processor = load_multiprocessor(relax.multiprocessor_type, callbacks, processor_size=relax.n_processors, verbosity=verbosity)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/__init__.py", line 189, in load_multiprocessor
object = clazz(callback=callback, processor_size=processor_size)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/mpi4py_processor.py", line 56, in __init__
raise Too_few_slaves_exception()
multi.multi_processor_base.Too_few_slaves_exception: master slave processing requires at least 2 processors to run you only provided 1, exiting....
--------------------------------------------------------------------------
mpirun noticed that the job aborted, but has no info as to the process
that caused that situation.
--------------------------------------------------------------------------
</source>
== See also ==
[[Category:Devel tutorial]]
