[mvapich-discuss] How many Groups ?

[Lewis Alderton]

Hi Devendar - all the processes spawned by mpiexec exit with the following
error. Trial and error show this only happens with 2048 or more groups.

[cli_0]: aborting job:
Fatal error in PMPI_Comm_create: Other MPI error



From:	Devendar Bureddy <bureddy at cse.ohio-state.edu>
To:	Lewis Alderton/Marlborough/IBM at IBMUS
Cc:	mvapich-discuss at cse.ohio-state.edu
Date:	02/23/2012 04:49 PM
Subject:	Re: [mvapich-discuss] How many Groups ?



Hi Lewis

MVAPICH2 inherits these details from MPICH2. It seems, we don't have
any 2048 limitation on number of group objects. Can you please tell us
where you are seeing these errors?

-Devendar

On Thu, Feb 23, 2012 at 1:32 PM, Lewis Alderton <lalderto at us.ibm.com>
wrote:
>
> I'm using MPI_Group_incl to create many groups. There seems to be limit
of
> 2048 groups - any way to increase this number ?
>
> ( I'm using mvapich2-1.8a1p1 )
>
> Thanks.
>
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