mxm

mxm, a C++ code which sets up a matrix-matrix multiplication problem A = B * C, and carries it out using

• Nested FOR I, J, K loops;
• Nested FOR I, K, J loops;
• Nested FOR J, I, K loops;
• Nested FOR J, K, I loops;
• Nested FOR K, I, J loops;
• Nested FOR K, J, I loops;
• the MATMUL Fortran90 intrinsic function;

The user is allowed to specify N1, N2, and N3, which define the matrix sizes.

Usage:

mxm n1 n2 n3

• n1 is the number of rows in B.
• n2 is the number of columns in B and rows in C.
• n3 is the number of columns in C;

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

mxm is available in a C version and a C++ version and a Fortran77 version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and codes:

mxm_test

linpack_bench, a C++ code which measures the time needed to factor and solve a large (N=1000) dense linear system of equations, and is used as a benchmark.

sum_million, a C++ code which sums the integers from 1 to 1,000,000, as a demonstration of how to rate a computer's speed;

timer_test, a C++ code which demonstrates how to compute CPU time or elapsed time.

Reference:

1. John Burkardt, Paul Puglielli,
   Pittsburgh Supercomputing Center,
   MATMUL: An Interactive Matrix Multiplication Benchmark

Source Code:

• mxm.cpp, the source code.
• mxm.sh, compiles the source code.