LINPACK_BENCH - The LINPACK Benchmark

LINPACK_BENCH is the LINPACK Benchmark, a test problem used to rate the performance of a computer. The test problem requires the user to set up a random dense matrix A, and a right hand side vector B which is the product of A and a vector of all 1's. The first task is to compute an LU factorization of the matrix A. The second task is to use the LU factorization to solve the linear system A*X=B.

Files you may copy include:

• linpack_bench.f, the original FORTRAN 77 source code.
• linpack_bench.f90, a FORTRAN 90 version.
• linpack_bench.out, the output from a run of the benchmark.

The list of routines includes:

• LINPACK_BENCH_MAIN drives the LINPACK benchmark program.
• ISAMAX finds the index of the vector element of maximum absolute value.
• MATGEN generates a random matrix and suitable right hand side.
• R_SWAP swaps two real values.
• SAXPY adds a constant times one vector to another.
• SGEFA factors a real matrix.
• SGESL solves a real general linear system A * X = B.
• RAN returns a uniformly distributed random number between 0 and 1.

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