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hello_mpi.html
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<html>
<head>
<title>
HELLO_MPI - Hello World, Using MPI
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
HELLO_MPI <br> Hello World, Using MPI
</h1>
<hr>
<p>
<b>HELLO_MPI</b>
is a FORTRAN90 program which
prints out "Hello, World!", while invoking the MPI parallel programming
system.
</p>
<p>
If you're just trying to learn MPI, or learning how to use
MPI on a different computer system, or in batch mode, it's helpful
if you start with a very simple program with a tiny amount of output
that should print immediately if things are working well.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>HELLO_MPI</b> is available in
<a href = "../../c_src/hello_mpi/hello_mpi.html">a C version</a> and
<a href = "../../cpp_src/hello_mpi/hello_mpi.html">a C++ version</a> and
<a href = "../../f77_src/hello_mpi/hello_mpi.html">a FORTRAN77 version</a> and
<a href = "../../f_src/hello_mpi/hello_mpi.html">a FORTRAN90 version</a> and
<a href = "../../py_src/hello_mpi/hello_mpi.html">a Python version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../f_src/communicator_mpi/communicator_mpi.html">
COMMUNICATOR_MPI</a>,
a FORTRAN90 program which
creates new communicators involving a subset of initial
set of MPI processes in the default communicator MPI_COMM_WORLD.
</p>
<p>
<a href = "../../f_src/heat_mpi/heat_mpi.html">
HEAT_MPI</a>,
a FORTRAN90 program which
solves the 1D Time Dependent Heat Equation using MPI.
</p>
<p>
<a href = "../../f_src/hello/hello.html">
HELLO</a>,
a FORTRAN90 program which
prints out "Hello, world!".
</p>
<p>
<a href = "../../f_src/hello_openmp/hello_openmp.html">
HELLO_OPENMP</a>,
a FORTRAN90 program which
prints out "Hello, world!" using the OpenMP parallel programming environment.
</p>
<p>
<a href = "../../examples/moab/moab.html">
MOAB</a>,
examples which
illustrate the use of the MOAB job scheduler for a computer cluster.
</p>
<p>
<a href = "../../f_src/mpi/mpi.html">
MPI</a>,
FORTRAN90 programs which
illustrate the use of the MPI application program interface
for carrying out parallel computatioins in a distributed memory environment.
</p>
<p>
<a href = "../../f_src/mpi_stubs/mpi_stubs.html">
MPI_STUBS</a>,
a FORTRAN90 library which
contains "stub" MPI routines, allowing a user to compile, load, and possibly
run an MPI program on a serial machine.
</p>
<p>
<a href = "../../f_src/multitask_mpi/multitask_mpi.html">
MULTITASK_MPI</a>,
a FORTRAN90 program which
demonstrates how to "multitask", that is, to execute several unrelated
and distinct tasks simultaneously, using MPI for parallel execution.
</p>
<p>
<a href = "../../f_src/prime_mpi/prime_mpi.html">
PRIME_MPI</a>,
a FORTRAN90 program which
counts the number of primes between 1 and N, using MPI for parallel execution.
</p>
<p>
<a href = "../../f_src/quad_mpi/quad_mpi.html">
QUAD_MPI</a>,
a FORTRAN90 program which
approximates an integral using a quadrature rule, and carries out the
computation in parallel using MPI.
</p>
<p>
<a href = "../../f_src/random_mpi/random_mpi.html">
RANDOM_MPI</a>,
a FORTRAN90 program which
demonstrates one way to generate the same sequence of random numbers
for both sequential execution and parallel execution under MPI.
</p>
<p>
<a href = "../../f_src/ring_mpi/ring_mpi.html">
RING_MPI</a>,
a FORTRAN90 program which
uses the MPI parallel programming environment, and measures the time
necessary to copy a set of data around a ring of processes.
</p>
<p>
<a href = "../../f_src/satisfy_mpi/satisfy_mpi.html">
SATISFY_MPI</a>,
a FORTRAN90 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.
</p>
<p>
<a href = "../../f_src/search_mpi/search_mpi.html">
SEARCH_MPI</a>,
a FORTRAN90 program which
searches integers between A and B for a value J such that F(J) = C,
using MPI for parallel execution.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Michael Quinn,<br>
Parallel Programming in C with MPI and OpenMP,<br>
McGraw-Hill, 2004,<br>
ISBN13: 978-0071232654,<br>
LC: QA76.73.C15.Q55.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "hello_mpi.f90">hello_mpi.f90</a>, the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<b>HELLO_FSU</b> compiles and runs the program on the FSU HPC cluster.
<ul>
<li>
<a href = "hello_fsu.sh">hello_fsu.sh</a>,
the MOAB script.
</li>
<li>
<a href = "hello_fsu_output.txt">hello_fsu_output.txt</a>,
the output file.
</li>
</ul>
</p>
<p>
<b>HELLO_LOCAL</b> compiles and runs the program on the local system,
which might work if OpenMPI is installed, and which might make sense if
your system has multiple cores.
<ul>
<li>
<a href = "hello_local.sh">hello_local.sh</a>,
the script.
</li>
<li>
<a href = "hello_local_output.txt">hello_local_output.txt</a>,
the output file. (No output because my system doesn't support MPIF90)
</li>
</ul>
</p>
<p>
<b>HELLO_SYSX</b> compiles and runs the program on Virginia Tech's System X cluster.
<ul>
<li>
<a href = "hello_sysx.sh">hello_sysx.sh</a>,
the MOAB script.
</li>
<li>
<a href = "hello_sysx_output.txt">hello_sysx_output.txt</a>,
the output file.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../f_src.html">
the FORTRAN90 source codes</a>.
</p>
<hr>
<i>
Last revised on 21 October 2011.
</i>
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