Communication layers and eager thresholds
Hello,I am bit confused about the run-time behaviour of one of our codes compiled with Intel ParallelStudio XE 2017.2.050 and run with the corresponding IntelMPI. Depending on the choice of...
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Unable to compile Timer sample (timertest.c, timerperformance.c)
"This example provides functionality to test performance of the VT_timestamp() function.""Ensure that the corresponding compiler, Intel MPI Library, and Intel Trace Analyzer and Collector are already...
View Article..\hydra\pm\pmiserv\pmiserv_cb.c (781): connection to proxy failed
Hi,I am having issues with the Windows Intel MPI version, 5.1. I am trying to run a program that uses the Intel MPI on two Windows 7 computers.This is the error from the mpi program I am running....
View ArticleMPI Linpack from MKL, SSE4_2, turbo, and Skylake: SSE 4.2 threads run at the...
This is a follow-on from this related topic in the MKL Forumhttps://software.intel.com/en-us/forums/intel-math-kernel-library/topic/782951In that situation, there were a couple of version of Intel MPI...
View ArticleBug Report for impi 2017 and 2018 versions on AVX512 niodes
For a specific code, which has a range of calls using impi, there is a probability of about 0.1% of obtaining incorrect results when using impi versions later than 5.0.2.044 on machines with AVX512...
View ArticleMPI error on 2019 Beta version
I am the admin of a small cluster, trying to help a user. The user has been able to compile and run this code on a Cray with Intel XE 2017, update 7.On our local cluster, we only had 2017, update 1....
View ArticleAPI for I_MPI_ADJUST Family
Hi,I am wondering whether Intel MPI provides a C API for changing the algorithm ID of collectives during run-time?As far as I see in the documentation, I can only set the I_MPI_ADJUST* environment...
View ArticleAPI for I_MPI_ADJUST Family
Hi,I would like to know whether the Intel MPI Library also has an API to select the algorithm for a given collective operation inside an MPI program?As far as I understand the documentation, I can only...
View ArticleI_MPI_ADJUST_BCAST: srun vs. mpiexec, performance differences
Hi,I was testing the I_MPI_ADJUST_BCAST flags on our OmniPath cluster (36 nodes). And I was using the OSU microbenchmarks for comparison and testing reasons. 1 Problem 1, mpiexec vs. srun when...
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Intel(R) MPI Library for Windows* OS, Version 2018 Update 2 Build 20180125...
I installed parallel_studio_xe_2018_update2_cluster_edition_setup on Microsoft Windows [Version 10.0.17134.165], and I noticed mpi fails to run on my laptop. I built the simple mpi test (test.f90) that...
View ArticleMPI strtok_r () from /lib64/libc.so.6
Hello,When I use intel mpi mpiexec (which /opt/intel/compilers_and_libraries_2017.7.259/linux/mpi/intel64/bin/mpiexec) with mpi compilervars.sh setup...
View Articlehow to find the firmware version of a Intel QLE7342 HCA
for compatibility with a storage system I need to know the firmware version of an Intel QLE7342 HCA but the command ibstat does not return it.It seems to be a known...
View ArticleExplicit MPI/OpenMP process pinning with Intel MPI
I have an MPI/OpenMP application. I would like to launch e.g. 23 MPI processes on 2 nodes (12 cores per node) where one process (e.g. rank 14) should have 2 OMP threads while all the others have a...
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Lost message with MPI_Improbe
Hi,The attached code (compiled with mpic++) will work as expected up to 15 MPI process, but will loop with 16 or more.Apparently MPI_Improbe fails to find the message: [alainm@pollux test]$ mpirun...
View ArticleMPI_Iallgather & MPI_Iallgatherv in Intel MPI
Hi there,How can I figure out what's the earliest version of Intel MPI that supports some specific MPI functions, such as MPI_Iallgather and MPI_Iallgatherv? I googled a bit but didn't find the...
View ArticleTrace Analyzer CLI and thread aggregation
Hi,I want to output a .csv file from a tracefile I've previously generated.Because I'm especially interested in the timings across all nodes, I want to use the "All_nodes" aggregation.If I'm not...
View Article2019 beta update 1 - tcp fabric unknown
Using a small cluster of Skylake-based systems, as below:2019 beta update 1 Red Hat 7.6 beta x86_64 (3.10.0-938.el7.x86_64)Systems include Intel Omni-Path HFAs in addition to an onboard gigabit...
View ArticlePinning / affinity for hybrid MPI/OpenMP on cluster
Dear Intel HPC community,I’m trying to optimize the scalability of my hybrid Fortran MPI/OpenMP code based on PETSc and MUMPS that I’m running on a SGI ICE-X cluster and am seeking advice and good...
View ArticleI_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:[0] MPI...
View ArticleAnnouncing Intel® Parallel Studio XE 2019 Release
Just Released Intel® Parallel Studio XE 2019! Accelerate Parallel Code—Transform Enterprise to Cloud, & HPC to AIBoost your parallel application performance on the latest Intel® processors with...
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