Re: [OMPI users] Forcing OpenMPI to use Ethernet interconnect instead of InfiniBand

Thanks Jeff, It worked. Now latency and bandwidth benchmarks are in performing as expected for both Ethernet and InfiniBand. --Ansar On Wed, Sep 10, 2014 at 3:34 PM, Jeff Squyres (jsquyres) wrote: > Are you inadvertently using the MXM MTL? That's an alternate Mellanox > transport that may acti

[OMPI users] Multiple threads for an mpi process

This must be a very old topic. I would like to run mpi with one process per node, e.g., using -cpus-per-rank=1. Then I want to use openmp inside of that. But other times I will run with a rank on each physical core. Inside my code I would like to detect which situation I am in. Is there an open

Re: [OMPI users] unaligned accesses

Hi Jeff, > We committed some fixes -- see if you can get farther with > tonight's nightly tarball. My small Java and C programs still break on Solaris 10 Sparc and x86_64 and on Linux (Sun C 5.12) with different errors. I have put everything into this email, because I have already sent single err

Re: [OMPI users] Multiple threads for an mpi process

On 9/12/2014 6:14 AM, JR Cary wrote: This must be a very old topic. I would like to run mpi with one process per node, e.g., using -cpus-per-rank=1. Then I want to use openmp inside of that. But other times I will run with a rank on each physical core. Inside my code I would like to detect wh

Re: [OMPI users] Multiple threads for an mpi process

On 9/12/14, 7:27 AM, Tim Prince wrote: On 9/12/2014 6:14 AM, JR Cary wrote: This must be a very old topic. I would like to run mpi with one process per node, e.g., using -cpus-per-rank=1. Then I want to use openmp inside of that. But other times I will run with a rank on each physical core.

Re: [OMPI users] Multiple threads for an mpi process

Hmmm...well, the info is there. There is an envar OMPI_COMM_WORLD_LOCAL_SIZE which tells you how many procs are on this node. If you tell your proc how many cores (or hwthreads) to use, it would be a simple division to get what you want. You could also detect the number of cores or hwthreads via

Re: [OMPI users] Multiple threads for an mpi process

On 9/12/2014 9:22 AM, JR Cary wrote: On 9/12/14, 7:27 AM, Tim Prince wrote: On 9/12/2014 6:14 AM, JR Cary wrote: This must be a very old topic. I would like to run mpi with one process per node, e.g., using -cpus-per-rank=1. Then I want to use openmp inside of that. But other times I will

[OMPI users] more info on SIGSEGV for Java and openmpi-1.9a1r32716 on Solaris

Hi, is the following info helpful? tyr java 160 /usr/local/gdb-7.6.1_64_gcc/bin/gdb mpiexec GNU gdb (GDB) 7.6.1 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistr

[OMPI users] about using mpi-thread-multiple

Hi, I would like to know what is the mpi version recomended for running multiple mpi call per process, i.e., MPI_THREAD_MULTIPLE in MPI_Init_thread(); Thanks, Edson