Recent content by gbozo

I think the problem is that the Core i7 systems are highly susceptable to memory contention. I didn't realize it until now, but my recent tests indicate that the 3770K has the same problem, although perhaps not quite as bad. As more threads are utilized, the performance per thread decreases...

I have a new Core i7 - 4930K hexa-core computer whose performance is very disappointing. I'm running it in a cluster of 3 computers, the others being Core i7 quad cores (4770 and 3770K). All are running Ubuntu 12.04 and OpenMPI. With 12 MPI processes on the 4930K and 8 MPI processes on each of...