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Pinning / affinity for hybrid MPI/OpenMP on cluster

Dear Intel HPC community,

Authored by Thibaut A. Last updated on 09/12/2018 - 13:53
Forum topic

I_MPI_PIN_DOMAIN example

Hi,

   I am trying to pin 6 ranks on a dual-socket (12 cores per socket) node, with 4 OpenMP threads per MPI rank. I set I_MPI_PIN_DOMAIN=omp:compact, but I get this I_MPI_DEBUG output:

Authored by 4f0drlp7eyj3 Last updated on 09/11/2018 - 16:06
Forum topic

Announcing Intel® Parallel Studio XE 2019 Release

Just Released Intel® Parallel Studio XE 2019! Accelerate Parallel Code—Transform Enterprise to Cloud, & HPC to AI

Authored by Carlos R. (Intel) Last updated on 09/13/2018 - 06:12
Forum topic

Incorrect result of mpi_reduce over real(16) sums. (2019)

I have found that MPI_REDUCE does not perform correctly sum reduction over real(16) variables.

Here is a simple code:

Authored by artu72 Last updated on 09/18/2018 - 04:09
Forum topic

Openmpi compilation for omnipath

Hi Team,

Can Someone Guide me how to configure openmpi with omnipath , we have a intel omnipath managed switch 24 port.

Authored by Kumar, Amit Last updated on 09/19/2018 - 13:54
Forum topic

PS XE 2019 MPI not reading from stdin on Windows

Hi,

Authored by joe Last updated on 09/20/2018 - 15:19
Forum topic

Intel MPI Library Runtime Environment for Windows

Dear Intel Team

Authored by Tim S. Last updated on 09/25/2018 - 15:39
Forum topic

How to map consecutive ranks to same node

Hi,

Intel Parallel Studio Cluster Edition, 2017 Update 5, on CentOS 7.3

Authored by 4f0drlp7eyj3 Last updated on 09/26/2018 - 14:39
Forum topic

Extraordinarily Slow First AllToAllV Performance with Intel MPI Compared to MPT

Dear Intel MPI Gurus,

Authored by Matt Thompson Last updated on 09/28/2018 - 07:16
Forum topic

OpenMP slower than no OpenMP

Here is a Friday post that has a sufficient lack of information that will probably be impossible to answer.  I have some older Fortran code I'm trying to improve the performance of.

Authored by joe Last updated on 09/28/2018 - 14:18