Bernd Dammann <b...@cc.dtu.dk> writes: > We use Moab/Torque, so we could use cpusets (but that has had some > other side effects earlier, so we did not implement it in our setup).
I don't know remember Torque does, but core binding and (Linux) cpusets are somewhat orthogonal. While a cpuset will obviously restrict the processes somewhat, it won't provide the necessary binding (at least unless the resource manager launches the processes and uses a cpuset for each). > Regardless of that, it looks strange to me, that this combination of > kernel and OMPI has such a negative side effect on application > performance. I assume you can determine whether or not it's the kernel rather than ompi/ofed by booting into the old one.
