yes, I did fresh pull this morning, for me it deadlocks reliably for 2
and more processes.
Thanks
Edgar
On 9/16/2015 10:42 AM, Nathan Hjelm wrote:
The reproducer is working for me with master on OX 10.10. Some changes
to ompi_comm_set went in yesterday. Are you on the latest hash?
-Nathan
On Wed, Sep 16, 2015 at 08:49:59AM -0500, Edgar Gabriel wrote:
something is borked right now on master in the management of inter vs. intra
communicators. It looks like intra communicators are wrongly selecting the
inter coll module thinking that it is an inter communicator, and we have
hangs because of that. I attach a small replicator, where a bcast of a
duplicate of MPI_COMM_WORLD hangs, because the inter collective module is
being selected.
Thanks
Edgar
#include <stdio.h>
#include "mpi.h"
int main( int argc, char *argv[] )
{
MPI_Comm comm1;
int root=0;
int rank2, size2, global_buf=1;
int rank, size;
MPI_Init ( &argc, &argv );
MPI_Comm_rank ( MPI_COMM_WORLD, &rank );
MPI_Comm_size ( MPI_COMM_WORLD, &size );
/* Setting up a new communicator */
MPI_Comm_dup ( MPI_COMM_WORLD, &comm1 );
MPI_Comm_size ( comm1, &size2 );
MPI_Comm_rank ( comm1, &rank2 );
MPI_Bcast ( &global_buf, 1, MPI_INT, root, MPI_COMM_WORLD );
if ( rank == root ) {
printf("Bcast on MPI_COMM_WORLD finished\n");
}
MPI_Bcast ( &global_buf, 1, MPI_INT, root, comm1 );
if ( rank == root ) {
printf("Bcast on duplicate of MPI_COMM_WORLD finished\n");
}
MPI_Comm_free ( &comm1 );
MPI_Finalize ();
return ( 0 );
}
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