I do not use MPI. I am just launching two instances of ex2 manually. On Mon, 2012-07-23 at 22:14 -0500, Jed Brown wrote: > On Mon, Jul 23, 2012 at 10:13 PM, Alexander Goncharov > <alexvg77 at gmail.com> wrote: > No, it did not fix it. Two instances 50% each. > > What affinity is your mpiexec setting?