ring_mpi, a C code which estimates the time it takes to send a vector of N double precision values through each process in a ring.
Process 0 sends N double precision values to process 1, which passes them to process 2, and so on, until process P-1 sends them back to process 0. The time for this transmission is recorded. The experiment is repeated several times, and for several different array sizes N.
The information on this web page is distributed under the MIT license.
ring_mpi is available in a C version and a C++ version and a Fortran90 version.
communicator_mpi, a C code which creates new communicators involving a subset of initial set of MPI processes in the default communicator MPI_COMM_WORLD.
heat_mpi, a C code which solves the 1D Time Dependent Heat Equation using MPI.
hello_mpi, a C code which prints out "Hello, world!" using MPI for parallel execution.
mpi_test, a C code which uses the MPI application code interface for carrying out parallel computatioins in a distributed memory environment.
multitask_mpi, a C code which demonstrates how to multitask, that is, to execute several unrelated and distinct tasks simultaneously, using MPI for parallel execution.
poisson_mpi, a C code which computes a solution to the Poisson equation in a rectangle, using the Jacobi iteration to solve the linear system, and MPI to carry out the Jacobi iteration in parallel.
prime_mpi, a C code which counts the number of primes between 1 and N, using MPI for parallel execution.
quad_mpi, a C code which approximates an integral using a quadrature rule, and carries out the computation in parallel using MPI.
random_mpi, a C code which demonstrates one way to generate the same sequence of random numbers for both sequential execution and parallel execution under MPI.
satisfy_mpi, a C code which demonstrates, for a particular circuit, an exhaustive search for solutions of the circuit satisfiability problem, using MPI to carry out the calculation in parallel.
search_mpi, a C code which searches integers between A and B for a value J such that F(J) = C, using MPI.
wave_mpi, a C code which uses finite differences and MPI to estimate a solution to the wave equation.