[OMPI users] problem with xfmpi_sane

2009-01-11 Thread Hana Milani
Dear all, I am very new to your forum, although it's long I'm using openmpi. Therefore sorry if my question seems hactic. I am working on opensuse 11.0, gfortran compiler and I have installed openmpi-1.2.8. I want to install mpiblacs and I have followed the FAQ of your website to change the Bm

Re: [OMPI users] slow MPI_BCast for messages size from 24K bytes to 800K bytes.

2009-01-11 Thread David Prendergast
Hey Krishna, Is this part of the reason that our users are seeing a significant slowdown when they go beyond using 2 nodes with espresso? You should try that as an example. It's surprising that using more than 2 nodes can lead to a slower wall time for calculations than using 2 alone. David k