我是cuda的新手，并尝试运行一个简单的vector add示例，该示例在网上找到以开始使用。我正在使用Win10 64位和Visual Studio 2017。
#include "cuda_runtime.h"
#include "cuda.h"
#include "device_launch_parameters.h"
#include <iostream>
#include <math.h>
// Kernel function to add the elements of two arrays
__global__
void add(int n, float *x, float *y)
{
int index = threadIdx.x;
int stride = blockDim.x;
for (int i = index; i < n; i += stride)
y[i] = x[i] + y[i];
}
int main(void)
{
int N = 1 << 20;
float *x, *y;
// Allocate Unified Memory – accessible from CPU or GPU
cudaMallocManaged(&x, N * sizeof(float));
cudaMallocManaged(&y, N * sizeof(float));
// initialize x and y arrays on the host
for (int i = 0; i < N; i++) {
x[i] = 1.0f;
y[i] = 2.0f;
}
// Run kernel on 1M elements on the GPU
add <<<1, 1 >>>(N, x, y);
// Wait for GPU to finish before accessing on host
cudaDeviceSynchronize();
// Check for errors (all values should be 3.0f)
float maxError = 0.0f;
for (int i = 0; i < N; i++)
maxError = fmax(maxError, fabs(y[i] - 3.0f));
std::cout << "Max error: " << maxError << std::endl;
// Free memory
cudaFree(x);
cudaFree(y);
return 0;
}
我使用了“ VS2017开发人员命令提示符”，因为窗口的命令提示符给了我
nvcc fatal : Cannot find compiler 'cl.exe' in PATH
，在线解决方案对我不起作用。然后我运行了这个命令（--compiler -options已经解决了一些错误）
nvcc add.cu --compiler-options "-D _WIN64"
但是编译器仍然给我错误
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(95): error: class template "std::_Is_function" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(139): error: class template "std::_Is_memfunptr" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(1824): error: class template "std::result_of" has already been defined
C:\Programming\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.14.26428\include\type_traits(1824): error: class template "std::result_of" has already been defined
我一直在寻找解决方案。似乎其他遇到类似问题的人的头文件也有问题，但是我的示例代码是从互联网上下载的，上传它的人对此没有任何问题，这使我对程序的哪个部分感到困惑有问题。
P.S .：我不知道自己的cuda是否安装正确。细节： 我无法在Windows上安装cuda，安装过程不断告诉我安装失败。然后，我在第19条帖子的此链接中找到了一种解决方案：https://devtalk.nvidia.com/default/topic/1035535/cuda-setup-and-installation/cuda-9-2-does-not-work-with-visual-studio-2017-15-7-1/2 似乎工作正常，但我不知道这是否是问题。
答案 0 :(得分：0)
我已经在Nvidia CUDA论坛上发布了相同的帖子： Link Here
我使用帖子中的方法重新安装了多次，但仍然存在相同的“类模板”问题。
然后我也使用相同的方法重新安装了CUDA 9.1和VS2017 ver 15.6.7，它终于可以工作了。
帖子中也遇到了我遇到的其他问题。
答案 1 :(得分：0)
我在Visual Studio 2019和CUDA v10.1中遇到了相同的问题，但是重新安装没有影响。最初我安装了不受支持的Visual Studio 2012，因此我更新了版本，然后开始看到这里提到的模板类重新定义错误-我使用的解决方案是从更改c1.exe / c1.dll的环境变量（x86）到（x64）目录，我所有的错误都消失了。
是： D：\ Program Files（x86）\ Microsoft Visual Studio \ 2019 \ Community \ VC \ Tools \ MSVC \ 14.22.27905 \ bin \ Hostx64 \ x86
现在： D：\ Program Files（x86）\ Microsoft Visual Studio \ 2019 \ Community \ VC \ Tools \ MSVC \ 14.22.27905 \ bin \ Hostx64 \ x64