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users-boun...@open-mpi.org wrote on 07/27/2009 02:17:19 PM:
> [image removed]
>
> Re: [OMPI users] Interaction of MPI_Send and MPI_Barrier
>
> Shaun Jackman
>
> to:
>
> Open MPI Users
>
> 07/27/2009 02:19
Hi Dick,
Okay, it's good to know that even if using MPI_Barrier in this fashion
did appear to be working, it's not guaranteed to work. Is there an MPI
collective function that has the desired effect? that after all
processes call this function, any previously posted MPI_Send are
guaranteed to
removed]
>
> [OMPI users] Interaction of MPI_Send and MPI_Barrier
>
> Shaun Jackman
>
> to:
>
> Open MPI
>
> 07/23/2009 05:04 PM
>
> Sent by:
>
> users-boun...@open-mpi.org
>
> Please respond to Open MPI Users
>
> Hi,
>
> Two processes run the
Hi,
Two processes run the following program:
request = MPI_Irecv
MPI_Send (to the other process)
MPI_Barrier
flag = MPI_Test(request)
Without the barrier, there's a race and MPI_Test may or may not return
true, indicating whether the message has been received. With the
barrier, is it guarante
