Application Name
Matrix multiplication with objects
Summary
- Name: Matrix multiplication with objects
- Contact Person: support-compss@bsc.es
- Access Level: public
- License Agreement: Apache2
- Platform: COMPSs
- Repository: Matrix multiplication with objects
Description
Matrix multiplication is a binary operation that takes a pair of matrices and produces another matrix.
If A is an n×m matrix and B is an m×p matrix, the result AB of their multiplication is an n×p matrix defined only if the number of columns m in A is equal to the number of rows m in B. When multiplying A and B, the elements of the rows in A are multiplied with corresponding columns in B.
In this implementation, A and B are square matrices (same number of rows and columns), and so it is the result matrix C. Each matrix is divided in N blocks of M doubles. The multiplication of two blocks is done by a multiply task method with a simple three-nested-loop implementation. When executed with COMPSs, the main program generates N3 tasks arranged as N2 chains of N tasks in the dependency graph.
Execution instructions
Usage: runcompss --lang=c /home/compss/workspace_c/matmul_objects/master/Matmul <numberOfBlocks> <blockSize> <initVal>
where:
- - numberOfBlocks: Number of blocks inside each matrix
- - blockSize: Size of each block
- - initVal: double value for the matrix initialization
Execution Example
runcompss --lang=c /home/compss/workspace_c/matmul_objects/master/Matmul 8 4 12.34
Build
buildapp Matmul
