eftover capacity. Hardware thread
> switching is much faster than software thread switching, which is why it's
> there.
>
> Most simulation software will load cores to 100% (even if it doesn't use
> that 100% wisely, which is a whole other flame war) and hyperthreading
> do
Someone pointed out to me that it is a problem in how the mapping with
newer versions is done and that using -bind-to none resolves the issue.
On Fri, Apr 10, 2015 at 3:22 PM, namu patel wrote:
> Hello All,
>
> I am using OpenMPI 1.8.4 on my workstation with 2 CPUs, each with 12
> p
Hello All,
I am using OpenMPI 1.8.4 on my workstation with 2 CPUs, each with 12
processors (6 with hyper-threading). When I run simulations using mpiexec,
I'm noticing a strange performance issue. If I run two simulations, each
with 6 processors, then everything is fine and 12 processors are under
