Gilles;
It works now. Thanks for pointing that out!
Rick
From: users [mailto:users-boun...@lists.open-mpi.org] On Behalf Of Gilles
Gouaillardet
Sent: Friday, September 30, 2016 8:55 AM
To: Open MPI Users
Subject: Re: [OMPI users] openmpi 2.1 large messages
Rick,
You must use
; dest = 0;
>
> source = 0;
>
> std::cout << "Task " << rank << "
> sending." << std::endl;
>
> MPI_Bcast(inmsg,bufsize,
> MPI_BYTE,rank,MPI_COMM_WORL
;< "Task " << rank << " complete." <<
std::endl;
}
MPI_Barrier(MPI_COMM_WORLD);
MPI_Finalize();
}
From: users [mailto:users-boun...@lists.open-mpi.org] On Behalf Of Gilles
Gouaillardet
Sent: Thursday, September 29, 2016 7:58 PM
To: Open MPI
Rick,
can you please provide some more information :
- Open MPI version
- interconnect used
- number of tasks / number of nodes
- does the hang occur in the first MPI_Bcast of 8000 bytes ?
note there is a known issue if you MPI_Bcast with different but matching
signatures
(e.g. some tas
Folks;
I am attempting to set up a task that sends large messages via
MPI_Bcast api. I am finding that small message work ok, anything less then 8000
bytes. Anything more than this then the whole scenario hangs with most of the
worker processes pegged at 100% cpu usage. Tried som
