编译 CUDA 时出错

Mar*_*tiz 0 c compiler-construction gcc cuda nvcc

我正在尝试编译一个 C 程序来尝试并行编程,当我尝试使用 nvcc 编译器(Nvidia)编译它时,它给了我这些错误:

inicis.cu(3): error: attribute "global" does not apply here

inicis.cu(3): error: incomplete type is not allowed

inicis.cu(3): error: identifier "a" is undefined

inicis.cu(3): error: expected a ")"

inicis.cu(4): error: expected a ";"

/usr/include/_locale.h(68): error: expected a declaration

inicis.cu(20): error: type name is not allowed

inicis.cu(21): error: type name is not allowed

inicis.cu(22): error: type name is not allowed

inicis.cu(41): error: identifier "dev_a" is undefined

inicis.cu(42): error: identifier "dev_b" is undefined

inicis.cu(43): error: identifier "dev_c" is undefined
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似乎 nvcc 无法识别Nvidia 制作的全局属性...

这是我的 C 程序,它非常简单:

__global__ void operate(*memoria1, *memoria2)
{
    memoria2[threadIdx.x] = memoria1[threadIdx.x] + 1;
}


int main(int args, char **argv){

    int a[5], c[5];
    int *memory_1, *memory_2;

    cudaMalloc(void** &memory_1, 5 * sizeof(int));
    cudaMalloc(void** &memory_2, 5 * sizeof(int));

    cudaMemcpy(memory_1, a, 5 * sizeof(int), cudaMemcpyHostToDevice);
    cudaMemcpy(memory_2, c, 5 * sizeof(int), cudaMemcpyHostToDevice);

    operate <<<1, 5>>>(memory_1, memory_2);

    cudaMemcpy(c, memory_2, 5 * sizeof(int), cudaMemcpyDeviceToHost);

    for (int i = 0; i < sizeof(c); ++i)
    {
        printf ("%d" , c[i]);
    }

    cudaFree(memory_1);
    cudaFree(memory_2);

    return 0;
}
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我认为它可能是编译器,但你认为它会是什么?

Rob*_*lla 5

我想如果你做出这些改变:

__global__ void operate(int* memoria1, int* memoria2)
                         ^              ^
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和:

cudaMalloc((void**) &memory_1, 5 * sizeof(int));
cudaMalloc((void**) &memory_2, 5 * sizeof(int));
           ^      ^
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您的代码将正确编译和运行。您的结果会有点奇怪,因为代码实际上并未初始化CUDA 内核正在操作的a和的值c。所以你可能想要初始化它们。