IS_SERIAL
NAS Parallel Benchmark IS, Serial Version, C

IS_SERIAL is a C program which is a serial implementation of the NAS Parallel Benchmark known as IS ("Integer Sort").

The NAS Parallel Benchmarks are "paper and pencil" specifications; that is, the proposers have laid down what the programs must do algorithmically, but only very general rules about computer language implementation have been given. Thus, a user or vendor has enormous freedom in implementing the benchmark program in a way that is optimal for a given architecture or parallel programming scheme.

As a starting point for implementors, the proposers have supplied certain initial versions of the benchmark programs.

This directory contains material derived from one such initial benchmark code. Persons interested in the original source of the benchmark codes should NOT work from this material, but should go to the NAS Parallel Benchmark website directly!

The benchmark programs are available in SERIAL, MPI and OPEN_MP versions, and in a sequence of "classes" of increasing size: S, W, A, B, C, D and E.

Statistics for classes S, A, and B, are available, as run on one processor of a Cray Y-MP, with a C version of the program.

Class	Size	Memory (Mw)	Time (sec)	Mop/s
S	2^16	0.3	0.2	30.5
A	2^23	26	21	37.2
B	2^25	114	126	25

Statistics for classes S, W, A, B, and C are available, as run on an Apple PowerPC G5, using this SERIAL C version of the program:

Class	Size	Memory (Mw)	Time (sec)	Mop/s
S	2^16	0.3	0.06	11
W	2^20	---	0.69	15
A	2^23	26	5.62	15
B	2^25	114	28.16	12
C	2^27	---	90.69	15

This directory contains the serial version of the benchmark, along with include files that allow it to run in some of the smaller sizes.

The web site for the NAS Parallel Benchmarks is http://www.nas.nasa.gov/Resources/Software/npb.html.

Languages:

IS_SERIAL is available in a C version.

Related Data and Programs:

FIRE_SERIAL, a C program which simulates a forest fire over a rectangular array of trees, starting at a single random location. It is intended as a starting point for the development of a parallel version.

LIFE_SERIAL, a C program which computes a few steps of the evolution of John Conway's Game of Life, intended as a starting point for implementing a parallel version.

LINPACK_BENCH, a FORTRAN77 program which measures the time taken by LINPACK to solve a particular linear system.

MATMUL, a FORTRAN77 program which is an interactive matrix multiplication benchmark.

MDBNCH, a FORTRAN77 program which is a benchmark molecular simulation calculation.

MXM_SERIAL, a C program which sets up a matrix multiplication problem A=B*C, intended as a starting point for implementing a parallel version.

POISSON_SERIAL, a C program which computes an approximate solution to the Poisson equation in a rectangle, and is intended as the starting point for the creation of a parallel version.

PRIME_SERIAL, a C program which counts the number of primes between 1 and N, intended as a starting point for the creation of a parallel version.

SEARCH_SERIAL, a C program which searches the integers from A to B for a value J such that F(J) = C. this version of the program is intended as a starting point for a parallel approach.

SUBSET_SUM_SERIAL, a C program which seeks solutions of the subset sum problem, in which it is desired to find a subset of a set of integers which has a given sum; this version of the program is intended as a starting point for a parallel approach.

Reference:

1. David Bailey, Eric Barszcz, John Barton, D Browning, Robert Carter, Leonardo Dagum, Rod Fatoohi, Samuel Fineberg, Paul Frederickson, Thomas Lasinski, Robert Schreiber, Horst Simon, V Venkatakrishnan, Sisira Weeratunga,
   The NAS Parallel Benchmarks,
   International Journal of High Performane Computing Applications,
   Volume 5, Number 3, September 1991, pages 63-73.

Source Code:

• is_serial.c, the source code.
• c_print_results.c, prints the results.
• c_timers.c, carry out the timings.
• wtime.c, a small routine used for timing.
• wtime.h, an include file for WTIME.

Examples and tests:

IS_SERIAL_S runs the benchmark in serial mode with problem size S.

• nbparams_S.h, the include file.
• is_serial_S_output.txt, the output file.

IS_SERIAL_W runs the benchmark in serial mode with problem size W.

• nbparams_W.h, the include file.
• is_serial_W_output.txt, the output file.

IS_SERIAL_A runs the benchmark in serial mode with problem size A.

• nbparams_A.h, the include file.
• is_serial_A_output.txt, the output file.

IS_SERIAL_B runs the benchmark in serial mode with problem size B.

• nbparams_B.h, the include file.
• is_serial_B_output.txt, the output file.

IS_SERIAL_C runs the benchmark in serial mode with problem size C.

• nbparams_C.h, the include file.
• is_serial_C_output.txt, the output file.

You can go up one level to the C source codes.