Applications/Openblas

Application Details

• Description:
• Version: 0.2.19 and 0.2.18
• Module: openblas/0.2.19/gcc-4.9.3 and openblas/gcc/0.2.18
• Licence: 3-clause BSD license

Usage Examples

OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.

Module

This shows the openblas module being loaded and a test.c program being compiled with the library:

[username@login01 ~]$ module add openblas/0.2.19/gcc-4.9.3

[username@login01 ~]$ module add gcc/4.9.3
[username@login01 ~]$  gcc -o test test.c -I  -lopenblas

If the library is multithreaded, please add -lpthread. If the library contains LAPACK functions, please add -lgfortran or other Fortran libs.

Example

This example shows calling cblas_dgemm in C. https://gist.github.com/xianyi/6930656

#include <cblas.h>
#include <stdio.h>

void main()
{
  int i=0;
  double A[6] = {1.0,2.0,1.0,-3.0,4.0,-1.0};         
  double B[6] = {1.0,2.0,1.0,-3.0,4.0,-1.0};  
  double C[9] = {.5,.5,.5,.5,.5,.5,.5,.5,.5}; 
  cblas_dgemm(CblasColMajor, CblasNoTrans, CblasTrans,3,3,2,1,A, 3, B, 3,2,C,3);

  for(i=0; i<9; i++)
    printf("%lf ", C[i]);
  printf("\n");
}

Again compilation here would be the following:

[username@login01 ~]$ gcc -o test_cblas_open test_cblas_dgemm.c  -lopenblas -lpthread -lgfortran

Further Information

• http://www.openblas.net/

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