linpack

This repository contains an implementation of the Linpack benchmark obtained from netlib. It has been lightly modified to not expect any keyboard input.

To run the benchmark:

• sudo docker run -it --rm elreyes/linpack

The benchmark results will be printed on the console.

Here are some sample results from my system with the default array size of 200:

$ sudo docker run -it --rm elreyes/linpack
Memory required:  315K.


LINPACK benchmark, Double precision.
Machine precision:  15 digits.
Array size 200 X 200.
Average rolled and unrolled performance:

    Reps Time(s) DGEFA   DGESL  OVERHEAD    KFLOPS
----------------------------------------------------
    2048   0.71  78.02%   2.89%  19.09%  4917805.960
    4096   1.43  78.02%   2.88%  19.11%  4870465.484
    8192   2.86  78.00%   2.87%  19.13%  4863107.385
   16384   5.70  77.98%   2.87%  19.14%  4882638.725
   32768  11.41  77.98%   2.87%  19.14%  4878150.976

It is possible to customize the array size used by the benchmark code (size is 200 by default). To do this, set an environment variable when running the container:

sudo docker run -it --rm -e LINPACK_ARRAY_SIZE=600 elreyes/linpack

Building the Image Locally

Alterntively, you can clone this repository and build your own Docker image locally from scratch. To do so, follow these steps:

• Clone this repository (requires git to be installed in your system... Google for your particular OS/distro)

  • git clone https://github.com/ereyes01/linpack.git

• Build the Docker image

  • cd linpack
  • sudo docker build -t linpack ./

• Run the benchmark

  • sudo docker run -it --rm linpack