Any experiences with Intel's Threading Building Blocks?

Intel's Threading Building Blocks (TBB) open source library looks really interesting. Even though there's even an O'Reilly Book about the subject I don't hear about a lot of people using it. I'm...

Why Do All My Open MPI Processes Have Rank 0?

I'm writing a parallel program using Open MPI. I'm running Snow Leopard 10.6.4, and I installed Open MPI through the homebrew package manager. When I run my program using mpirun -np 8 ./test,...

error in mpirun command

-------------------------------------------------------------------------- MPI_ABORT was invoked on rank 2 in communicator MPI_COMM_WORLD with errorcode 1. NOTE:...

assign two MPI processes per core

How do I assign 2 MPI processes per core? For example, if I do mpirun -np 4 ./application then it should use 2 physical cores to run 4 MPI processes (2 processes per core). I am using Open MPI...

MPI kill unwanted processes

I'm using OpenMPI with C bindings. In my code, there is a required number of processes. If MPI is executed such that more processes are opened than are required, I wish to kill or terminate the...

Problems running MPI (OpenMPI) app on Linux on ARM

I am trying to follow this tutorial for building and running an MPI application on an ARM based Ubuntu 11.10 system. When installing open-mpi environment on my PC machine, the sample program runs...

MPI Hostfiles with Hyperthreading

I'm running some small MPI jobs across nodes in a computer lab at my university. There's no queuing system installed, so I have to generate MPI hostfiles myself each time I want to run a job,...

Configure error with Mac OS X 10.8.5 Xcode 5.0.2: clang: error: argument to '-V' is missing (expected 1 value) clang: error: no input files

on MacOSX 10.8.5, after upgrading to Xcode 5.0.2 (and upgrading/installing the Command Line Tools (from within Xcode preferences) I was installing FFTW 3.3.3 and Open MPI 1.6.5 by configuring them...

How to compile an MPI included c program using cmake

I am trying to apply openmp and mpi techniques to an open source C program which requires "cmake . && make" to be built. I already found at...

Why does mpirun not respect my choice of BTL?

I am using Open MPI (1.8.3) on Cygwin on a Windows 7 machine. I would like to run MPI codes on this machine exclusively, without talking on any external network. I understand I should be able...

mpiexec and python mpi4py gives rank 0 and size 1

I have a problem with running a python Hello World mpi4py code on a virtual machine. The hello.py code is: #!/usr/bin/python #hello.py from mpi4py import MPI comm = MPI.COMM_WORLD size =...

Setting up OpenMPI-1.10.2 to run jobs on multiple nodes

First of all my setup till now: I'm working on a fresh installed Ubuntu Gnome 15.10. on all pc's. My networks consists of 4 pc's with static ips (198.168.0.1 - 198.168.0.4) with 198.168.0.4 as the...

Running MPI code with 256 procs - "[warn] select: Invalid argument" message

Following the tutorial on this link, I try to run a MPI code under MacOS 10.9.5 (Mavericks) with a number of process equal to 256 : the MPI code allocates for each process a 512x512 2D array, so...

LightGBM Image Not Found after Mac install

I installed the lightgbm package with pip (version 10.0.1) to my Python lib (version 3.6.3) on macOS Sierra (version 10.12.6), along with the dependencies found in the documentation, including...

Syntax error near unexpected token '(', when sourcing bashrc to setup Openfoam environment

Recently I installed Bash on Ubuntu on Windows using WSL to use OpenFOAM. But when I installed OpenFOAM it is giving me the error like: -bash: eval: line 38: syntax error near unexpected token...

ORTE_ERROR_LOG: Data unpack would read past end of buffer in file grpcomm_direct.c

Open MPI Version: v4.0.0 Output of ompi_info | head on two machine [email protected]:~$ ssh s1 ompi_info | head Package: Open MPI [email protected] Distribution Open MPI: 4.0.0 ...

Plotly missing orca

I have small problem when exporting static chart using plotly. Plotly does not correctly recognize that I have orca installed and I have still error related to missing orca. I try to change the...

C++ bindings (deprecated)

I am using Ubuntu 18.04. I am trying to install MPI now i get these errors,Please help me. Open MPI configuration: ----------------------- Version: 4.0.2 Build MPI C bindings: yes Build MPI C++...

Testing MPI project (compiling using Cmake) with Travis CI

I am learning to use Travis CI for continuous integration. My project needs to use the MPI library so I let Travis install OpenMPI and use cmake to compile the code. Here is my .travis.yml...

Running C++ client/server for parallel processing using MPI

Introduction In order to parallelize numerical integration in C++, I want to use a client/server approach on my local machine. For this, I am using the message passing interface for C++. My...

Debugging MPI Remotely Using GDB

I am trying to debug code I wrote using MPI from a remote access group of pi's. I can not access the Pis directly in order to be able to use a GUI to debug the code. I have tried what using screen...

Invalid MIT-MAGIC-COOKIE-1 key when locally running MPI application or starting ParaView

I am using Ubuntu 20.04, locally, no remote access or anything. Still, whenever I start up paraview from the terminal, or when I run an application that uses MPI (I think it's enough if it calls...

Error in configuring openmpi 64 bit on a linux machine using intel compiler

While configuring openmpi with 64 bit using intel compiler, I got this error: checking if sizeof(C int) == sizeof(Fortran INTEGER)......

Problems with Orca and OpenMPI for parallel jobs

Hello to the community: I recently started to use ORCA software for some quantum calculation but I have been having a lot of problems to lunch a parallel calculation in the cluster of my...

MPI Fortran support through the mpi_f08 module with gfortran

I have some Fortran code I would like to paralelize with MPI. Appereantly, recomended way to use MPI (MPICH, in my case) with Fortran is through mpi_f08 module (mpi-forum entry on the matter), but...

ValueError in MPI scatter method while using 2D list in Python-mpi4py

I have a csv file that I read it into a 2D list and I want to use scatter method in MPI (mpi4py) to send different chunk of this list into different processing elements to process them as...

What am I missing getting mpirun to schedule across multiple nodes?

TL;DR; I'm having troubles getting MPI to schedule jobs across more than a single node. There seems to be a communication error between nodes at the MPI level that isn't a problem for TCP or at...

Segmentation fault with MPI shared memory and quad precision

A very simple C program using MPI shared memory crashes for me when quadruple precision (__float128) is used with GCC (but not with the Intel C compiler). The program allocates a shared real array...

Caught signal 11 (Segmentation fault: address not mapped to object at 0x54b6)

I am trying to remotely compile some code on a computing cluster, and I am getting the following error: cd run_test; export OMP_NUM_THREADS=2; mpiexec -n 2 ./BATSRUS.exe > runlog libibverbs:...

Cannot compile Makefile using make command on Windows

Problem summary I am trying to install an open-source parallel finite-element code called TACS and available at this github repository. To comply with the indicated prerequisites, I followed the...