lecture01-mpi_introduction

Time calculation

double MPI_Wtime() – returns elapsed time.

double MPI_Wtick() – returns resolution of MPI_Wtime.

int MPI_Barrier(MPI_Comm comm) – blocks until all processes have reached this routine.

How to compile and run

$ mpicc instead of gcc

$ mpirun –np <n_processes> <programm> <args>

Спасибо за внимание!

Task

MPI «Hello World!»

MPI «Ping-pong»