Hi,
I'm benchmarking our (well tested) parallel code on and AMD based system,
featuring 2x AMD Opteron(TM) Processor 6276, with 16 cores each for a total of
32 cores. The system is running Scientific Linux 6.1 and OpenMPI 1.4.5.
When I run a single core job the performance is as expected. How
On 01/21/2011 12:26 PM, Steffen Brinkmann wrote:
/home_dir/openmpi-1.4.3_installation/bin/mpirun -n 32 hostname
returns 32 times the same node.
What did I do wrong???
You need to tell OpenMPI on which hosts to run - for example by suppling
a host file:
/home_dir/openmpi-1.4.3_installation/
On 01/20/2011 05:50 PM, Olivier SANNIER wrote:
What is the behavior in case a node dies or becomes unreachable?
Your run will be aborted. However there is checkpoint/restart support for Linux
http://www.open-mpi.org/faq/?category=ft
As this is a Win32 program, I'll have to take into account tha
Hi,
What communication layer is used? How do I choose it?
The fastest available. You can choose the network by parameters given to
mpirun see
http://www.open-mpi.org/faq/?category=tuning#mca-def
What is the behavior in case a node dies or becomes unreachable?
Your run will be aborted. Howe
Ed Peddycoart wrote:
The machines are RHEL 5.4 machines and an older version of Open MPI was
already installed. I understand from the faq that I should not simply
over write the old installation, but would it be better if I remove the
old version or install the new to a different location. I
