Download MPI for Windows(Microsoft MPI)
https://www.microsoft.com/en-us/download/details.aspx?id=57467
Run both .exe and .msi file, they will install Microsoft MPI under C:\Program Files\Microsoft MPI by default.(But if you have changed the register manually, the path might be changed)
Configure MPI in Visual Studio 2019
Open Project -> Project_name Properties
Under VC++ Directories
Add C:\Program Files (x86)\Microsoft SDKs\MPI\Include in Include Directories
Add C:\Program Files (x86)\Microsoft SDKs\MPI\Lib\x86 in Library Directories
In C/C++ -> Preprocessor -> Preprocessor Definitions
Add MPICH_SKIP_MPICXX
In C/C++ -> Code Generation
Change Runtime Library to MTd
In Linker -> Input -> Additional Dependencies
Add msmpi.lib and msmpifec.lib
Testing
#include<stdio.h>
#include<mpi.h>
#include<stdlib.h>
int main(int argc, char* argv[])
{
int myid, numprocs, namelen;
char processor_name[MPI_MAX_PROCESSOR_NAME];
MPI_Init(&argc, &argv); // starts MPI
MPI_Comm_rank(MPI_COMM_WORLD, &myid); // get current process id
MPI_Comm_size(MPI_COMM_WORLD, &numprocs); // get number of processeser
MPI_Get_processor_name(processor_name, &namelen);
if (myid == 0) printf("number of processes: %d\n...", numprocs);
printf("%s: Hello world from process %d \n", processor_name, myid);
MPI_Finalize();
return 0;
}
Click Build -> Build Solution
And your terminal will looks like the following screenshot. Please make sure you can build .exe file successfully without error.
You can see the .exe file path inside the terminal, for me, it is E:\TestingPrograms\omp_test\x64\Debug\omp_test.exe
Open file explorer, E:\TestingPrograms\omp_test\x64\Debug\ folder (Your path will be different!)
Do right-click while pressing Shift button
Enter mpiexec -n 5 omp_test.exe in powershell or command-line window(depend on your Windows version, for Win10 you will see powershell, but for early version you will see command-line)
You can replace 5 with number of process you want, omp_test.exe must be replaced by the name of your builded .exe file
The result will be:
Done!
