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Subject: Re: [OMPI users] send message twice
From: Trent Creekmore (mtcreekmore_at_[hidden])
Date: 2010-09-13 01:12:58

I find issues like this is related to security issue. Firewall, not enough
access privilege, SE Linux, etc.




From: users-bounces_at_[hidden] [mailto:users-bounces_at_[hidden]] On
Behalf Of ???
Sent: Monday, September 13, 2010 12:04 AM
To: users_at_[hidden]
Subject: [OMPI users] send message twice


Hi all.

I have some problem with sending messages. I want to send 2 messages to
each node.

for example, send 2 messages to 2 nodes,

    if (rank == 0) {
        for (dest = 1; dest < numProcs; dest++) {
            MPI_Send(&a, 1, MPI_INT, dest, 1, MPI_COMM_WORLD);
            MPI_Send(&b, 1, MPI_INT, dest, 2, MPI_COMM_WORLD);

    } else {
        MPI_Recv(&a_recv, 1, MPI_INT, 0, 1, MPI_COMM_WORLD, &status);
        MPI_Recv(&b_recv, 1, MPI_INT, 0, 2, MPI_COMM_WORLD, &status);

but it doesn't work well. Only first message(sending data "a" to node1) is
sent successfully, but the rest 3 transmissions(sending data "b" to node1
and sending data "a" and "b" to node2) have no response which seems to be
deadlock. There are no runtime error.

The version 1.4.1 has been used.

best regards,