worker.hpp File Reference

MPI worker process management. More...

#include <mpi.h>
#include <iostream>

Include dependency graph for worker.hpp:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
class	pfc::MPI_Worker
	An MPI worker class that wraps MPI_Init and MPI_Finalize. More...

Detailed Description

MPI worker process management.

This header provides the MPI_Worker class for managing individual MPI worker processes with automatic initialization and output management.

The MPI_Worker class:

• Automatically initializes and finalizes MPI
• Mutes stdout on non-root ranks to avoid duplicate output
• Provides rank and process count queries
• Manages MPI communicator

This is particularly useful for applications where only rank 0 should produce console output.

#include <openpfc/mpi/worker.hpp>
 
int main(int argc, char** argv) {
    pfc::MPI_Worker worker(argc, argv, MPI_COMM_WORLD);
    // Only rank 0 prints to stdout
    std::cout << "Rank: " << worker.rank() << std::endl;
    return 0;
}

See also

mpi/environment.hpp for alternative RAII MPI management

mpi/communicator.hpp for communicator wrapper

Author

OpenPFC Development Team

Date

2025