MPICH installation

I searching on internet how to download the MPICH in my laptop, and something is going wrong. I don't know what is happening. I am using ubuntu 18.04. Someone know any good installation video, or doc to use and download it? I am trying to do the installation since 3 days and I can't. Sorry for the silly question

asked May 7, 2020 at 11:24 Giorgos Mouch Giorgos Mouch 111 1 1 gold badge 1 1 silver badge 4 4 bronze badges Are you sure you can't use the version that is provided by the Ubuntu repository? Commented May 7, 2020 at 11:42

if I write '''mpiexec --version''' tells me: mpiexec(OpenRTE) 2.1.1. But when I try to run a basic program like hello world, nothing happend.

Commented May 7, 2020 at 11:46

1 Answer 1

1. Install mpich from the default Ubuntu repositories.

sudo apt install mpich

2. Copy the below hello world C code into a new file named mpi_hello_world.c and save.

#include #include int main(int argc, char** argv) < // Initialize the MPI environment MPI_Init(NULL, NULL); // Get the number of processes int world_size; MPI_Comm_size(MPI_COMM_WORLD, &world_size); // Get the rank of the process int world_rank; MPI_Comm_rank(MPI_COMM_WORLD, &world_rank); // Get the name of the processor char processor_name[MPI_MAX_PROCESSOR_NAME]; int name_len; MPI_Get_processor_name(processor_name, &name_len); // Print off a hello world message printf("Hello world from processor %s, rank %d out of %d processors\n", processor_name, world_rank, world_size); // Finalize the MPI environment. MPI_Finalize(); >

3. Change directories to the directory which contains mpi_hello_world.c, then compile and run the code with the following commands.

mpicc mpi_hello_world.c -o hello-world mpirun -np 5 ./hello-world

answered May 12, 2020 at 6:10 118k 119 119 gold badges 286 286 silver badges 317 317 bronze badges

I get: [-ideapad-3-15iil05:562228] *** Process received signal *** [-ideapad-3-15iil05:562228] Signal: Segmentation fault (11) [-ideapad-3-15iil05:562228] Signal code: Address not mapped (1) [-ideapad-3-15iil05:562228] Failing at address: (nil) [-ideapad-3-15iil05:562228] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7f73e562d520] [-ideapad-3-15iil05:562228] *** End of error message *** Segmentation fault (core dumped)