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__global__ void vectorAdd(float* a, float* b, float* c, int n) {\r\n    int idx = blockIdx.x * blockDim.x + threadIdx.x;\r\n    if (idx < n) {\r\n        c[idx] = a[idx] + b[idx];\r\n    }\r\n}\r\n\r\nint main() {\r\n    int n = 1<<20; \/\/ 1M elements\r\n    size_t bytes = n * sizeof(float);\r\n    \r\n    \/\/ \u5206\u914d\u4e3b\u6a5f\u8a18\u61b6\u9ad4\r\n    float *h_a = (float*)malloc(bytes);\r\n    float *h_b = (float*)malloc(bytes);\r\n    float *h_c = (float*)malloc(bytes);\r\n    \r\n    \/\/ \u521d\u59cb\u5316\u9663\u5217\r\n    for(int i = 0; i < n; i++) {\r\n        h_a[i] = rand()\/(float)RAND_MAX;\r\n        h_b[i] = rand()\/(float)RAND_MAX;\r\n    }\r\n    \r\n    \/\/ \u5206\u914d\u88dd\u7f6e\u8a18\u61b6\u9ad4\r\n    float *d_a, *d_b, *d_c;\r\n    cudaMalloc(&d_a, bytes);\r\n    cudaMalloc(&d_b, bytes);\r\n    cudaMalloc(&d_c, bytes);\r\n    \r\n    \/\/ \u5c07\u8cc7\u6599\u8907\u88fd\u5230\u88dd\u7f6e\r\n    cudaMemcpy(d_a, h_a, bytes, cudaMemcpyHostToDevice);\r\n    cudaMemcpy(d_b, h_b, bytes, cudaMemcpyHostToDevice);\r\n    \r\n    \/\/ \u555f\u52d5\u6838\u5fc3\r\n    int blockSize = 256;\r\n    int numBlocks = (n + blockSize - 1) \/ blockSize;\r\n    vectorAdd<<>>(d_a, d_b, d_c, n);\r\n    \r\n    \/\/ \u5c07\u7d50\u679c\u8907\u88fd\u56de\u4e3b\u6a5f\r\n    cudaMemcpy(h_c, d_c, bytes, cudaMemcpyDeviceToHost);\r\n    \r\n    \/\/ \u6e05\u7406\r\n    cudaFree(d_a);\r\n    cudaFree(d_b);\r\n    cudaFree(d_c);\r\n    free(h_a);\r\n    free(h_b);\r\n    free(h_c);\r\n    \r\n    return 0;\r\n}<\/code><\/pre>\n
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CUDA\u5728\u9999\u6e2f\u8cc7\u6599\u4e2d\u5fc3\u7684\u61c9\u7528<\/strong><\/h2>\n
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\u5be6\u73fe\u6700\u5927CUDA\u6548\u80fd\u7684\u786c\u9ad4\u914d\u7f6e<\/strong><\/h2>\n
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