MPI_Syrk_implentation

Overview

Implementation of the BLAS level 3 algorithm SYRK (Symmetric -k Rank update) using MPI.

Prerequisite

The following software is needed to run this Project:

1. Git

2. Git LFS

3. OpenBlas

4. OpenMPI

   Under Mac OS

   • Using brew

     • Install

       to install OpenMPI with brew you can use the following command brew install open-mpi

   • Commands
     • mpicc
     • mpirun

Getting Started

Download the repository with:

git clone HeldJohannes/MPI_Syrk_implementation

The test files are to big for normal git, for this reason the repository uses git LFS. To receive the files git pull should automatically pull the files if it isn't the case run:

git lfs pull

To compile run

make

Usage

mpirun -np <CORES> MPI_SYRK_implementation -m <ROWS> -n <COLS> -a <ALGORITHM> <input_file>

Testfiles and expected result files can be found in the folder ./resource/input and ./resource/in.

In the folder ./resource/output are the expected output for the testcases to check the test of ./resource/input

The first number is the number of rows and the second the number of columns.

Example

input and expected result:

       
        1,  2                      1,  4
        3,  4                      2,  5
        5,  6                      3,  6
       ------                    ------
1,3,5| 35, 44              1,2,3| 14, 32
2,4,6| 44, 56              4,5,6| 32, 77

Check if the computation is correct

You can use the R script ./resource/Check.R to check if the computation is correct

Rscript --vanilla ./resource/Check.R <result_file> <input_file> [TRUE|FALSE]

where result_file the file is which was the output of MPI_SYRK_implementation and <input_file> is the file for which MPI_SYRK_implementation computed the result [TRUE|FALSE] tell the script to ignore the lower half of the result matrix.

Example

mpirun -np 1 ./cmake-build-debug/src/MPI_SYRK_implementation -m 60 -n 40 -a 0 ./resource/input/test60x40.csv;
Rscript --vanilla ./resource/Check.R ./syrk_result.csv ./resource/input/test60x40.csv FALSE

Generate Testdata

You can use the R script in the test folder to generate testdata:

Rscript --vanilla ./test/GernateTestdata.R <dir_to_safe> <Number of Rows (m)> <Number of Cols (n)>

Helpful Links

• https://www.jetbrains.com/help/clion/openmpi.html