Difference between revisions of "Applications/Openblas"
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==Usage Examples== | ==Usage Examples== | ||
| − | OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version. | + | OpenBLAS is an optimized BLAS library based on [https://en.wikipedia.org/wiki/GotoBLAS GotoBLAS2] 1.13 BSD version. |
===Module=== | ===Module=== | ||
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[username@login01 ~]$ module add gcc/4.9.3 | [username@login01 ~]$ module add gcc/4.9.3 | ||
| − | [username@login01 ~]$ | + | [username@login01 ~]$ gcc -o test test.c -I -lopenblas |
</pre> | </pre> | ||
Revision as of 08:21, 21 April 2017
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
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