topic Hey Arthur, in Intel® MPI Library

How to set each process priority and affinity values when running an MPI program using mpiexec utility ?

ArthurRatz — Thu, 28 Jan 2016 05:21:54 GMT

Please anyone tell me how to set each process priority and affinity values when running an MPI program using mpiexec utility ?

Thanks. Waiting for your reply.

Cheers, Arthur.

If you're using intel mpi,

TimP — Thu, 28 Jan 2016 18:36:07 GMT

If you're using intel mpi, affinity is covered in the getting started guide. For the most usual cases, it's automatic. If you need to deal with priorities (unlikely), it seems beyond the scope of this forum.

Thanks for reply.

ArthurRatz — Thu, 28 Jan 2016 18:39:28 GMT

Thanks for reply.

Hi Arthur,

KitturGanesh — Thu, 28 Jan 2016 18:54:44 GMT

Hi Arthur,
You should be able to do so with the _MPI_PIN_PROCESSOR_LIST environment setting (refer to: https://software.intel.com/en-us/node/528898).

Also, its' best for you to post your questions in the Intel Clusters and HPC Technology forum where you'll get those issues resolved by support folks specialized in MPI. So, I'll transfer your issue to that forum and someone will respond to you accordingly and I'll let them know as well.

_Kittur

Hey Arthur,

Gergana_S_Intel — Thu, 28 Jan 2016 22:34:01 GMT

Hey Arthur,

Tim is correct, I would generally keep the defaults unless you're doing something very specific. The Intel MPI Library does a good job of handling MPI rank placement and affinity out of the box. If you're wondering which processes are pinned to which cores, you can set I_MPI_DEBUG=5 and that'll print a pinning table.

topic Hey Arthur, in Intel® MPI Library

How to set each process priority and affinity values when running an MPI program using mpiexec utility ?

If you're using intel mpi,

Thanks for reply.

Hi Arthur,

Hey Arthur,

Thanks for your replies.