CUDA提供的函数评估Occupancy

#include <iostream>                                                                                                                                 
#include <cuda_runtime.h>
#include <cuda_occupancy.h>

// Device code
__global__ void MyKernel(int *d, int *a, int *b)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    d[idx] = a[idx] * b[idx];
}
// Host code
int main()
{
    int numBlocks; // Occupancy in terms of active blocks
    int