matrix_randomize.cu File Reference

Implementation of the Matrix::randomize method to fill the matrix with random values. More...

#include "matrix.h"
#include <curand_kernel.h>
#include <cuda_runtime.h>

Include dependency graph for matrix_randomize.cu:

Go to the source code of this file.

Functions
__global__ void	randomizeKernel (double *data, int rows, int cols, unsigned long seed)
	CUDA kernel function that fills each element in the matrix with a random value between -0.5 and 0.5. More...

Detailed Description

Implementation of the Matrix::randomize method to fill the matrix with random values.

Definition in file matrix_randomize.cu.

Function Documentation

randomizeKernel()

__global__ void randomizeKernel	(	double *	data,
		int	rows,
		int	cols,
		unsigned long	seed
	)

CUDA kernel function that fills each element in the matrix with a random value between -0.5 and 0.5.

Parameters

data	Pointer to the matrix data on the GPU.
rows	Number of rows in the matrix.
cols	Number of columns in the matrix.
seed	Seed for random number generator.

Definition at line 17 of file matrix_randomize.cu.

                                                                                      {
    // Calculate the global thread index
    int idx = blockIdx.x * blockDim.x + threadIdx.x;
    int totalElements = rows * cols;
 
    // Ensure the thread's index is within the matrix bounds
    if (idx < totalElements) {
        // Calculate the row and column for this thread
        int row = idx / cols;
        int col = idx % cols;
 
        // Initialize a random state for this thread
        curandState state;
        curand_init(seed, idx, 0, &state);
 
        // Generate a random value between 0 and 1, then shift it to be between -0.5 and 0.5
        double randomValue = curand_uniform(&state) - 0.5;
 
        // Assign the random value to the current matrix element
        data[row * cols + col] = randomValue;
    }
}