Hi, just to make sure, you wrote in the previous mail that you tested IMB-MPI1 and it "reports for the last test" ...., and the results are for "processes=6", since you have 4 and 8 core machines, this test could be run on the same 8 core machine over shared memory and not over Infiniband, as you suspected.
You can rerun the IMB-MPI1 test with -mca btl self,openib to be sure that the test does not use shared memory or tcp. Lenny. On 12/24/08, Biagio Lucini <b.luc...@swansea.ac.uk> wrote: > Pavel Shamis (Pasha) wrote: > > > Biagio Lucini wrote: > > > > > Hello, > > > > > > I am new to this list, where I hope to find a solution for a problem > > > that I have been having for quite a longtime. > > > > > > I run various versions of openmpi (from 1.1.2 to 1.2.8) on a cluster > > > with Infiniband interconnects that I use and administer at the same > > > time. The openfabric stac is OFED-1.2.5, the compilers gcc 4.2 and > > > Intel. The queue manager is SGE 6.0u8. > > > > > Do you use OpenMPI version that is included in OFED ? Did you was able > > to run basic OFED/OMPI tests/benchmarks between two nodes ? > > > > > > Hi, > > yes to both questions: the OMPI version is the one that comes with OFED > (1.1.2-1) and the basic tests run fine. For instance, IMB-MPI1 (which is > more than basic, as far as I can see) reports for the last test: > > #--------------------------------------------------- > # Benchmarking Barrier > # #processes = 6 > #--------------------------------------------------- > #repetitions t_min[usec] t_max[usec] t_avg[usec] > 1000 22.93 22.95 22.94 > > > for the openib,self btl (6 processes, all processes on different nodes) > and > > #--------------------------------------------------- > # Benchmarking Barrier > # #processes = 6 > #--------------------------------------------------- > #repetitions t_min[usec] t_max[usec] t_avg[usec] > 1000 191.30 191.42 191.34 > > for the tcp,self btl (same test) > > No anomalies for other tests (ping-pong, all-to-all etc.) > > Thanks, > Biagio > > > -- > ========================================================= > > Dr. Biagio Lucini > Department of Physics, Swansea University > Singleton Park, SA2 8PP Swansea (UK) > Tel. +44 (0)1792 602284 > > ========================================================= > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
