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I am trying to use the PETSc (Portable, Extensible Toolkit for Scientific Computation) library in Go over cgo. After the call of PetscInitialize, the program will crash at a random point with the ...
Fabian's user avatar
  • 81
4 votes
0 answers
79 views

I cannot run open-mpi or mpich on my machine (macOS (Darwin 24.5.0, macOS Sequoia 15.5) with an Intel (x86_64) processor), and I suspect there is something seriously wrong with my compilers or ...
Chancelor Roberts's user avatar
  • 73
3 votes
0 answers
138 views

I am trying to parallelize a program that reads a huge file from the stdin using OpenMPI. The problem is that the input is not correctly read. More specifically, when the OpenMPI runtime is ...
Doyoung Kim's user avatar
  • 31
2 votes
0 answers
74 views

I'm trying to add openmpi as a static library to my c++ project on a Windows Visual Studio environment using the mscv compiler. However, the FetchContent_MakeAvailable command does not seem to be ...
Kubrickesque's user avatar
  • 21
0 votes
1 answer
37 views

https://docs.open-mpi.org/en/v5.0.x/launching-apps/pmix-and-prrte.html says "PMIx" is a standard. Then it says "PMIx" has many configure- and run-time options. How can a standard ...
Consumer of Cat Content's user avatar
  • 382
0 votes
0 answers
68 views

I am using Mpi4py with OpenMPI on Ubuntu, and I also need this to run on RedHat. I am trying to run compute_ldos() for a relatively large set of parameters, and am trying to use as all available cores ...
lmcdev's user avatar
  • 3
0 votes
0 answers
41 views

My simple openmpi prgoram used to work in 2 node systen, after freshly reconfiguring Libfabric, openmpi when i run it it hangs. 1.I am getting output from only one rank 2.ps output on another rank ...
Alok Prasad's user avatar
  • 9
0 votes
3 answers
113 views

I want to have the global minimum (floating point types) across all MPI ranks and proceed only on the rank which computed the local minimum. Specifically, can we compare the global and local minimum ...
Mathieu's user avatar
  • 332
0 votes
0 answers
41 views

inline MPI_File file_open(const std::string& filename, int access) { int ret; // MPI_Barrier(MPI_COMM_WORLD); std::cout << "MPI filename: " << filename ...
Samik Banerjee's user avatar
  • 5
0 votes
0 answers
125 views

I was trying to install cuda aware openmpi. While following the following recipe laid out here: $ git clone https://github.com/openucx/ucx.git ucx $ cd ucx $ ./autogen.sh $ mkdir build $ cd build $ .....
R Walser's user avatar
  • 526
0 votes
3 answers
305 views

edit: i tried to install this requirements file contains these and the errors occur after Collecting mpi4py==3.1.5 Downloading mpi4py-3.1.5.tar.gz (2.5 MB) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━...
Otis Willie's user avatar
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0 votes
2 answers
79 views

The question pretty much says it all. This is for benchmarking purposes. I really do need to target specific cores on specific nodes. Targeting particular nodes is not enough in and of itself for ...
bob.sacamento's user avatar
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0 votes
0 answers
45 views

Because I am trying to find the reasons and solve another problem (this one with mpirun saying I have a problem with my current allocation), I tried to find the allocations of my nodes in a multinode ...
KansaiRobot's user avatar
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3 votes
0 answers
72 views

I've been trying out the partitioned communication that was added in openmpi 5. I am aware that "The current implementation is an early prototype and is not fully compliant with the MPI-4.0 ...
user28656646's user avatar
  • 41
0 votes
0 answers
79 views

I am trying to install neko v0.8.0... but when I enter "make",it halts like this: comm/comm_wrapper.o: In function neko_comm_wrapper_init: /WORK/thuscc24team13_work/neko-0.8.0/src/comm/...
Just-lose-it's user avatar
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0 votes
0 answers
163 views

I am new to Slurm. I am running a job with srun that uses two nodes and encountering a problem. When I run the same job but only using one node (either of them), the task completes. I will first ...
KansaiRobot's user avatar
  • 10.6k
1 vote
0 answers
70 views

I have a particle simulation in C which is split over 4 MPI processes and running fast (compared to serial). However, one region of my implementation is N^2 complexity, where I need to compare each ...
Luna Morrow's user avatar
  • 11
0 votes
0 answers
170 views

I have a small problem with a program that is run using MPI. I need to run this program on a HPC and I need to run it this way. The program needs to have 1 MPI process per node, use the number of ...
GRaiolo's user avatar
  • 1
0 votes
1 answer
314 views

On an M3 Pro, in Xcode, I want to run a simple C source file: #include <mpi.h> #include <stdio.h> int main(int argc, char** argv) { MPI_Init(&argc, &argv); int world_size;...
FueledByPizza's user avatar
  • 55
0 votes
1 answer
87 views

Consider the following program: #include <iostream> #include <mpi.h> int main() { int provided = -1; MPI_Init_thread(NULL, NULL, MPI_THREAD_MULTIPLE, &provided); if (provided !=...
Etienne M's user avatar
  • 715
0 votes
0 answers
191 views

I am using mpirun to run a hybrid program as a Multiple Data Multiple Program (MPMD) application as follows: mpirun -x OMP_NUM_THREADS=4 -x OMP_PLACES=cores -n 28 --map-by ppr:14:socket:pe=4 --host ...
Gaurav Saxena's user avatar
  • 729
0 votes
0 answers
201 views

I'm a bit new to MPI and parallel processing. I've been running a job in an HPC environment in which I can use up to 160 physical cores. However, increasing the number of MPI process to match the ...
Gabriel Lucas's user avatar
  • 311
-3 votes
1 answer
108 views

Hereby I have a master-worker model, where the one and only master start a MPI_Comm workercomm and all the workers are spawned by MPI_Comm_spawn in it. Of course in the first run some bugs exists and ...
Megumin's user avatar
  • 19
0 votes
0 answers
341 views

I am trying to run SCF calculations in BURAI. I installed BURAI in Ubuntu with this tutorial https://www.youtube.com/watch?v=_V69D-FjGps When I try to run SCF calculations with this command: /usr/bin/...
dhruft's user avatar
  • 21
0 votes
1 answer
1k views

I installed OpenMPI 5.0.1 on fresh installation of Ubuntu 24.04. All dependencies were installed via apt and should be in the standard locations. However, mpiexec gives the following runtime warning --...
This-name-will-do-nicely's user avatar
  • 93
1 vote
0 answers
139 views

I have installed openmpi 4.1.6 in kubuntu 24.04 from the repositories. The output of mpirun --version is: mpirun (Open MPI) 4.1.6 Report bugs to http://www.open-mpi.org/community/help/ However, if I ...
Emilio's user avatar
  • 300
1 vote
0 answers
40 views

I'm implementing an Allreduce algorithm inside the mca/coll framework. The algorithm I'm implementing needs each node to send at each step of the computation only a part of the vector (like a ring ...
Saverio Pasqualoni's user avatar
  • 33
0 votes
0 answers
26 views

I have to simulate 2D plate heat diffusion. Everything works fine with 4 tasks, but it doesn't when using N*4 tasks. I suspect the problem is in the logic of communications between the upper and lower ...
iustindinu's user avatar
  • 1
0 votes
0 answers
113 views

I'm working as an intern currently, and I was asked to build a Singularity container for OpenMPI to make distributed programming possible on multiple machines of our HPC cluster using containers. ...
Vincent Donney's user avatar
  • 1
0 votes
0 answers
206 views

I have already installed the open-mpi by command arch -x86_64 brew reinstall --build-from-source open-mpi and run the terminal under Rosetta. In the terminal the command arch return with i386, and run ...
Acerodancisto's user avatar
  • 1
0 votes
1 answer
81 views

I'm trying to use use openmpi over InfiniBand Pkey networks. I can't seem to find any documentation on how to do that. I'm using openmpi 4.1.2 and just a simple ring_c. mpiexec -n 8 -host cn0001-pkey,...
Astro.Bacon's user avatar
  • 43
0 votes
0 answers
136 views

! $UWHPSC/codes/mpi/test1.f90 program test1 use mpi implicit none integer :: ierr, numprocs, proc_num call mpi_init(ierr) call mpi_comm_size(MPI_COMM_WORLD, numprocs, ierr) ...
Abhishek Gond's user avatar
  • 1
0 votes
0 answers
39 views

I wrote this code in C that multiplies a matrix by a vector, locally in each process(ylocal) and then the root process gathers the results in its local vector(y). I am using MPI_Gatherv because it has ...
Nementh's user avatar
  • 1
1 vote
1 answer
928 views

I am using termux with ubuntu. I need to run a python program. However i get the below error. root@localhost:~/capstone/mpi# mpirun --allow-run-as-root -np 1 python3 index.py [localhost:18945] ...
user24471273's user avatar
  • 11
1 vote
0 answers
97 views

I am trying to generate a random 4x4 matrix in a parallel, "even" way: given the 1D array (representing a matrix) dimension N (e.g. 16 in this case) and the number of processes NP, each ...
G. Ianni's user avatar
  • 179
1 vote
0 answers
223 views

I developed a code parallelized in a hybrid way based on OpenMPI + OpenMP. It works as I expect if 'enough' number of MPI processors are given. So far based on tests, I would roughly say 'enough' ...
user23897302's user avatar
  • 11
0 votes
1 answer
614 views

My mpi4py (3.1.5) installation with openmpi (4.1.4) on python3.8 and ubuntu 20.04 has randomly stopped working today. Whenever I execute anything that loads mpi4py in python, I get the following error:...
paeion's user avatar
  • 35
0 votes
1 answer
145 views

I have developed a maven-based plugin (or app) for the open-source bioinformatics Java Application Cytoscape. I was wondering if I could incorporate Open MPI Java Bindings inside this project. My goal ...
Hikmet Emre Kaya's user avatar
  • 1
1 vote
0 answers
103 views

I'm studying for an exam at university about parallel programming with Open MPI. I'm trying to read a file with the master process (rank 0) and send some data to all workers processes, but I get a ...
VITO GIACALONE's user avatar
  • 11
0 votes
1 answer
196 views

I am trying to run the following command: mpiexec -n 1 python scratch.py where scratch.py is a simple example provided here from mpi4py.futures import MPIPoolExecutor def square(i): global initialized ...
Hikmet Emre Kaya's user avatar
  • 1
0 votes
0 answers
148 views

I am installing mpi4py (following instructions here https://mpi4py.readthedocs.io/en/stable/install.html) and because of restrictions in my environment I have to build MPI from sources (following ...
Georgia's user avatar
  • 11
0 votes
0 answers
238 views

I am attempting to run an MPI_allgather across multiple nodes of a cluster (openmpi). I run into an issue with the memory space that I have attempted to bypass using MPI_Comm_split_type(MPI_COMM_WORLD,...
Sasaank's user avatar
  • 1
0 votes
0 answers
376 views

I am a mechanical engineering looking to do CFD simulations on HPC machines. Currently, I am programming my procedures within the framework of PARAMESH, which is a fortran library with MPI calls for ...
Andris R.'s user avatar
  • 31
0 votes
0 answers
118 views

I am trying to run a Python Package that uses MPI for running tasks in parallel. as per the package's guidelines; I installed MPICH 4.2.0, followed my mpi4py. However, after running their example ...
Hikmet Emre Kaya's user avatar
  • 1
0 votes
2 answers
849 views

Trying to bind an Open MPI rank to every core on a NUMA node machine. The machine has 2 nodes, each with 12 cores. The nodes doesnt have name, so I'm not able to do --host a:12,b:12 Also I want to ...
Yicheng Li's user avatar
  • 17
0 votes
1 answer
151 views

I am running qiskit code which execute fine when I invoke it with python3 but when called with mpirun, it executes SegmentationFault Errormentioning some Permission Errors. I run command as root , it ...
aneela's user avatar
  • 1,639
2 votes
1 answer
2k views

I installed openmpi v4.1.6 (and dependencies) to a clean environment using anaconda conda-forge channel. After installing and attempting to compile, I get the error ------------------------------------...
Eric Van Clepper's user avatar
  • 49
0 votes
0 answers
276 views

I am trying to compile and run this software. I have Open-MPI library installed with gfortran. I get the following error. mpif90 -o .obj/mod4source.o mod4source.f90 -g -heap-arrays -fcheck=all -...
Guddu's user avatar
  • 2,497
1 vote
1 answer
161 views

I have been trying to set up a way to send data between processes from a vector (naming it syncer). This vector contains the message in this format : [destination_process, source_process, data, offset]...
newbie565's user avatar
  • 11
0 votes
1 answer
75 views

When I define an array in an mpi program, does the all processors share the same address, that is the same array(pointer) or they point to different arrays(pointers)? For example, int the following ...
heyula's user avatar
  • 173

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