Recent questions tagged mpi

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mpi - Sending 2D arrays in Fortran with MPI_Gather

I want to send 2d chunks of data using MPI_GATHER. For example: I have 2x3 arrays on each node and I want 8x3 array on root ... 1 5 1 5 5 1 5 5 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mpi - MPI_Rank return same process number for all process

I'm trying to run this sample hello world program with openmpi and mpirun on debian 7. #include <stdio.h> #include ... 1 Why is the number of processes still 1? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mpi - How to run a binary file on multiple processors?

question from:https://stackoverflow.com/questions/66157714/how-to-run-a-binary-file-on-multiple-processors...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mpi - data exchange between multiple ranks with MPI_Bsend

I would like to ask a few questions (mostly question 2.) for the code below whose purpose is to send ... com/questions/65868520/data-exchange-between-multiple-ranks-with-mpi-bsend...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mpi io - MPI Read file using MPI_Type_create_subarray

I want to using MPI MPI_File_read_all to read a file input.txt which contains binary integers 0,1,2,...,1000 ... com/questions/65883635/mpi-read-file-using-mpi-type-create-subarray...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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475 views

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mpi - mpi4py Split_type using openmpi's OMPI_COMM_TYPE_SOCKET

Is it possible to split a communicator using openmpi's OMPI_COMM_TYPE_SOCKET in mpi4py? I've verified this works: ... /mpi4py-split-type-using-openmpis-ompi-comm-type-socket...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mpi - hostfile issue mpirun: Error: unknown option "-f"

mpirun -np 4 -f hostfile ./h i am getting this error . I have already set the hostfile pathin .bashrc .can ayone please ... : unknown option "-f" Type 'mpirun --help' for usage....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mpi - Data unpack would read past end of buffer in file util/show_help.c at line 501

I submitted a job via slurm. The job ran for 12 hours and was working as expected. Then I got Data unpack would read past end of buffer in file ... -------------------------------...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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