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NAS Parallel Benchmarks

About

This repository contains the SaC implementation of NASA's NAS Parallel Benchmark suite.

We have implementations for the following benchmarks:

  • EP - Embarrassingly Parallel
  • CG - Conjugate Gradient, irregular memory access and communication
  • MG - Multi-Grid on a sequence of meshes, long- and short-distance communication, memory intensive
  • FT - discrete 3D fast Fourier Transform, all-to-all communication

The following are not yet implemented

  • IS - Integer Sort, random memory access
  • BT - Block Tri-diagonal solver
  • SP - Scalar Penta-diagonal solver
  • LU - Lower-Upper Gauss-Seidel solver

More information on these benchmarks can be found at https://www.nas.nasa.gov/publications/npb.html

Build

The system uses CMake (at least version 3.6) to build the project, and depends on the SaC compiler and the SaC standard library being installed.

$ cd NASParallelBenchmarks
$ git submodule init
$ git submodule update
$ mkdir build
$ cd build
$ cmake ..
$ make -j4

NOTE: When pulling the latest commit, remember to run git submodule update or you will be missing changes to the cmake-common repository.

Variables that can be passed to CMake

When running CMake it is possible to pass the following variables:

  • -DTARGETS=x;y;z --- build stdlib for targets x, y and z. (defaults are seq; mt_pth)
  • -DSAC2C_EXEC=/path/to/sac2c --- specify sac2c executable directly. Otherwise CMake will try to find sac2c on yout PATH.
  • -DLINKSETSIZE=n --- set -linksetsize n when calling sac2c. This option is responsible for the number of C functions that are put in a single C file when compiling a SaC program. The rule of thumb:

    • value 0 is the fastest time-wise but potentially results in a large memory consumption

    • value 1 reduces the memory consumption to minimum, buy significantly increases compilation time.

      Default value: 500.

  • -DEXCLUDE_ERRORS=ON|OFF --- Do not build benchmarks that cause compiler errors (Default is ON).