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Subject: [OMPI users] OpenMPI 1.7.5 and "--map-by" new syntax
From: Filippo Spiga (spiga.filippo_at_[hidden])
Date: 2014-02-26 06:55:28

Dear all,

I am playing with Open MPI 1.7.5 and with the "--map-by" option but I am not sure I am doing thing correctly despite I am following the instruction. Here what I got

$mpirun -np 20 --npersocket 5 -bind-to core osu_alltoall
The following command line options and corresponding MCA parameter have
been deprecated and replaced as follows:

  Command line options:
    Deprecated: --npersocket, -npersocket
    Replacement: --map-by socket:PPR=N

  Equivalent MCA parameter:
    Deprecated: rmaps_base_n_persocket, rmaps_ppr_n_persocket
    Replacement: rmaps_base_mapping_policy=socket:PPR=N

The deprecated forms *will* disappear in a future version of Open MPI.
Please update to the new syntax.

after changing according to the instructions I see

$ mpirun -np 24 --map-by socket:PPR=5 -bind-to core osu_alltoall

The mapping request contains an unrecognized modifier:

  Request: socket:PPR=5

Please check your request and try again.
[tesla49:30459] [[29390,0],0] ORTE_ERROR_LOG: Bad parameter in file ess_hnp_module.c at line 510
It looks like orte_init failed for some reason; your parallel process is
likely to abort. There are many reasons that a parallel process can
fail during orte_init; some of which are due to configuration or
environment problems. This failure appears to be an internal failure;
here's some additional information (which may only be relevant to an
Open MPI developer):

  orte_rmaps_base_open failed
  --> Returned value Bad parameter (-5) instead of ORTE_SUCCESS

Is there any place where the new syntax is explained?

Thanks in advance

Mr. Filippo SPIGA, M.Sc. - HPC  Application Specialist
High Performance Computing Service, University of Cambridge (UK) ~ ~ skype: filippo.spiga
«Nobody will drive us out of Cantor's paradise.» ~ David Hilbert
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