Re: [OMPI users] Problem with MPI_Intercomm_create

2011-06-02 Thread David Zhang
Since your new intra-communicator contains all members, couldn't you just use the MPI_COMM_WORLD communicator? 2011/6/1 Frédéric Feyel : > Hello, > > I have a problem using MPI_Intercomm_create. > > I 5 tasks, let's say T0, T1, T2, T3, T4 resulting from two spawn > operations by T0. > > So I have

Re: [OMPI users] Regarding OpenMPI

2011-06-02 Thread Jeff Squyres
Not directly, but your IB network will not run without a subnet manager having been run at least once. It's been a few years since I've been an IB vendor, but whenever you bring a new IB port online (e.g., if a server reboots) it has to check in with the subnet manager before it will be brought

Re: [OMPI users] MPI_COMM_DUP freeze with OpenMPI 1.4.1

2011-06-02 Thread Jeff Squyres
On May 31, 2011, at 10:55 AM, francoise.r...@obs.ujf-grenoble.fr wrote: > I reproduced the problem with the following code : I'm not sure I can reconcile this statement with your later statements...? > I execute the program on 2 nodes of 12 cores each (a total of 24 processes), > it doesn't sto

[OMPI users] MPI_ALLREDUCE: Segmentation Fault

2011-06-02 Thread Timothy Stitt
Hi all, We have a code built with OpenMPI (v1.4.3) and the Intel v12.0 compiler that has been tested successfully on 10s - 100s of cores on our cluster. We recently ran the same code with 1020 cores and received the following runtime error: > [d6cneh042:28543] *** Process received signal *** >