[mvapich-discuss] CPU affinity and binding check

[Hari Subramoni]

Hello Davide,

If you would like to find out what cores the processes are bound to, you
can configure MVAPICH2 with debug options and run it
with MV2_SHOW_CPU_BINDING=1/2. It will display the cores the processes are
bound to

Please refer to the following section of the userguide for more information

http://mvapich.cse.ohio-state.edu/static/media/mvapich/mvapich2-2.2a-userguide.html#x1-15700010.7

Thx,
Hari.

On Thu, Nov 5, 2015 at 5:08 PM, Davide Vanzo <vanzod at accre.vanderbilt.edu>
wrote:

> Hi all,
> I'm learning how to optimize MPI codes running on heterogeneous
> architectures with GPUs. I compiled MVAPICH 2.1 with hwloc support and I
> know how to instruct mpirun_rsh to allocate threads according to the
> desired topology. Now I would like to find (or write, if it doesn't exist)
> an MPI program that returns as output what cores each thread has been
> assigned to. I started looking into the hwloc library and the numalib, but
> why reinventing the wheel?
> Thank you in advance for your help.
>
> Davide
>
> --
> Davide Vanzo, PhD
> Application Developer
> Advanced Computing Center for Research and Education (ACCRE)
> Vanderbilt University - Hill Center 201
> www.accre.vanderbilt.edu
>
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>
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