[petsc-dev] Understanding Some Parallel Results with PETSc

[Jed Brown]

On Thu, Feb 23, 2012 at 18:53, Nystrom, William D <wdn at lanl.gov> wrote:

> Rerunning the CPU case with numactl results in a 25x speedup and
> log_summary
> results that look reasonable to me now.
>

What command are you using for this? We usually use the affinity options to
mpiexec instead of using numactl/taskset manually. Did you also set a
specific memory policy? Which Linux kernel is this?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20120223/4d78b183/attachment.html>