RING_MPI is a C program 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 computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
RING_MPI is available in a C version and a C++ version and a FORTRAN90 version.
COMMUNICATOR_MPI, a C program which creates new communicators involving a subset of initial set of MPI processes in the default communicator MPI_COMM_WORLD.
HEAT_MPI, a C program which solves the 1D Time Dependent Heat Equation using MPI.
HELLO_MPI, a C program which prints out "Hello, world!" using MPI for parallel execution.
MOAB, examples which illustrate the use of the MOAB job scheduler for a computer cluster.
MPI, C programs which illustrate the use of the MPI application program interface for carrying out parallel computatioins in a distributed memory environment.
MPI_STUBS, a C library which contains "stub" MPI routines, allowing a user to compile, load, and possibly run an MPI program on a serial machine.
MULTITASK_MPI, a C program which demonstrates how to "multitask", that is, to execute several unrelated and distinct tasks simultaneously, using MPI for parallel execution.
POISSON_MPI, a C program 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 program which counts the number of primes between 1 and N, using MPI for parallel execution.
QUAD_MPI, a C program which approximates an integral using a quadrature rule, and carries out the computation in parallel using MPI.
RANDOM_MPI, a C program 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 program 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 program which searches integers between A and B for a value J such that F(J) = C, using MPI.
WAVE_MPI, a C program which uses finite differences and MPI to estimate a solution to the wave equation.
You can go up one level to the C source codes.