[mpich-discuss] Get universe size no longer supported?

[Reuti]

Am 18.02.2013 um 13:37 schrieb Jeff Hammond:

> I've informed the appropriate people about the Trac issue.

Thanks.


> I recall that MPI stipulates only that MPI_UNIVERSE_SIZE exist; it
> need not be defined.
> 
> I think that MPICH might set MPI_UNIVERSE_SIZE in the process manager.
> What PM are you using?

I started with a plain `mpiexec -np 4 ./program`, hence it should use Hydra as it's a symbolic link to mpiexec.hydra.

-- Reuti


> Jeff
> 
> On Mon, Feb 18, 2013 at 5:52 AM, Reuti <Reuti at staff.uni-marburg.de> wrote:
>> Hi,
>> 
>> a call:
>> 
>> error=MPI_Comm_get_attr(MPI_COMM_WORLD, MPI_UNIVERSE_SIZE, &universe_sizep, &flag);
>> 
>> worked in MPICH2 1.4.1p1. But the "flag" returned unsupported in 1.5 and 3.0.2. Was this info removed from being retrieved?
>> 
>> -- Reuti
>> 
>> PS: I found http://trac.mpich.org/projects/mpich/ticket/1426 mentioning MPI_UNIVERSE_SIZE but it throws an error:
>> 
>> TracError: The Trac Environment needs to be upgraded.
>> 
>> Run "trac-admin /www/trac.mpich.org/projects/mpich upgrade"
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> 
> 
> -- 
> Jeff Hammond
> Argonne Leadership Computing Facility
> University of Chicago Computation Institute
> jhammond at alcf.anl.gov / (630) 252-5381
> http://www.linkedin.com/in/jeffhammond
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