ring_mpi


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.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

ring_mpi is available in a C version and a C++ version and a FORTRAN90 version.

Related Data and codes:

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, C codes which illustrate the use of 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.

ring_mpi_test

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.

Reference:

  1. Peter Pacheco,
    Parallel codeming with MPI,
    Morgan Kaufman, 1996,
    ISBN: 1558603395,
    LC: QA76.642.P3.

Source Code:


Last revised on 26 June 2020.