MPI_Allreduce is toooo slow
I use the benchmark in Intel MPI (IMB) to measure the performance of MPI_Allreudce over a rack with 25 machines equipped with Infiniband 40G switch. (I use the latest version of parallel studio 2017...
View ArticleTrouble installing Windows MPI runtime environment
Hi,I'm trying to install the Windows MPI Runtime Environment on a Windows 7 / x64 machine for use with some modelling software. I'm using version 5.1 Update 1 (or 5.1.1.110, which is not quite the...
View ArticleHow to use command to install Parallel studio cluster to a specific location
We ordered and installed parallel studio cluster 2017 for our new cluster. However, the cluster management software, Bright, requests to install compiler in a shared directory instead of default one...
View Articlempirun seems to set GOMP_CPU_AFFINITY
It appears Intel MPI is setting GOMP_CPU_AFFINITY, why? How do I prevent this?When I print my env I get:bash-4.2$ env | grep OMP OMP_PROC_BIND=true OMP_PLACES=threads OMP_NUM_THREADS=2When I mpirun...
View ArticleMPI Installer error
I have tried to run several MPI installers (w_mpi_p_2017.2.187.exe , w_mpi-rt_p5.1.3.180, w_mpi-rt_p_4.1.3.047) and all of them failed on my Windows 7 PC. The following error shows up:Error while...
View ArticleTrading App
I'll make a trading app that trades up to 7 assets concurrently (independently). The trading server is accessed through websockets. So each concurrent work/task should open/close a websocket connection...
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A problem in installing the Intel MPI Library w_mpi_p_2017.2.187.exe under...
A problem arise when I am trying to install the last version of Intel MPI Library w_mpi_p_2017.2.187.exe under Windows 10 both on Intel i7-6950X and Intel Core 2 Duo E6750 based PC. Two screenshots are...
View Article[Intel MPI benchmarks] Non-free license of JavaScript files
Intel MPI benchmarks is licensed under the Common Public License, which is approved both by FSF and OSI as a Free Software / Open Source license. However, while packaging Intel MPI benchmarks for...
View Articlempi2017 update2 segfault at libmpifort.so.12.0 when mpirun test
hello: After install parallel_studio_xe_2017.2.050, i try to test mpi like this:in dir "/opt/intel/compilers_and_libraries_2017.2.174/linux/mpi/test" use cmd : "mpiicc test.c -o test "then...
View Articlempi2017 update2 segfault at libmpifort.so.12.0 when mpirun test
hello: After install parallel_studio_xe_2017.2.050, i try to test mpi like this:in dir "/opt/intel/compilers_and_libraries_2017.2.174/linux/mpi/test" use cmd : "mpiicc test.c -o test "then...
View ArticleMPI/openMP segmentation error
Hello,when I run my program on two nodes, and set the number of threads larger than 1 (i.e., 2-16 threads), I've encountered the segmentation error:forrtl: severe (174): SIGSEGV, segmentation fault...
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Abaqus with Omnipath
I am trying to get Abaqus running over an Omnipath fabric.Abaqus version 6.14-1 and using Intel MPI 5.1.2In my abaqus_v.env file I set mp_mpirun_options -v -genv I_MPI_FABRICS shm:tmiBy the way the...
View ArticleIrqbalance update affinity_hint and banned cpus conflict
I have a cluster with Ominpath nodes and CentOS 7.2.On Sunday I upgraded the irqbalance package to irqbalance-1.0.7-6The system is now repeatedly logging /usr/sbin/irqbalance: irq NN affinity_hint and...
View ArticleNested MPI process failed with GetParentPort error
Hello,we are trying to execute a tricky code with intel mpi 5.0.2.044.We have a main program executed viampirun -n 1 Exec_mainThis main program makes system call to an external shell script that...
View ArticleWhat could be a cause of the MPI program to run slower on multinode cluster?
Hello everyone,I've got a question about MPI program performance: I've developed an MPI program that processes large amounts of data (about 10^9) elements, and running this program I've noticed that as...
View ArticleWhich logical core does MPI background threads are pinned?
I program in C++ which parallelizes using both MPI and OpenMP (1 MPI process per machine, Multiple threads are exploited by each MPI process)I carefully pin the worker threads of OpenMP and others in...
View ArticleDifferent environment variable on different compute node
I have two computers, the value of environment variable on different computer is not the same. For example, TMP is set to "C:\tmp" on compute 1, and TMP is set to "D:\Temp_Dir" on computer 2. When I...
View ArticleHybrid MPI/OpenMP showing poor performance when using all cores on a socket...
Hi,I'm running a hydrid MPI/OpenMP application on Intel® E5-2600v3 (Haswell) Series cores and I notice a drop in performance by 40% when using all cores (N) on a socket vs. N-1 cores on a socket. This...
View ArticleMPI bad termination error
Hi,I have trouble getting to run the test program linux/mpi/test/test.c included in the Intel MPI package.My trouble only occurs on machines equipped with AMD processors.Specially, I've installed MPI...
View ArticleMPI_File_write_shared problem
Hi,there seems to be a problem with some versions of intelmpi and file access with mpi shared file pointers. The files are not written correctly. We are using intelmpi 2017 on a cluster with gpfs...
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