Question

我正在尝试运行http://docs.thrust.googlecode.com/hg/group__modifying.html中描述的推力for_each示例，但在编译和运行时遇到错误。

我使用以下文件：fe.cu：

#include <thrust/for_each.h>
#include <thrust/device_vector.h>
#include <stdio.h>

struct printf_functor{
    __host__ __device__
    void operator()(int x){
        printf("%d\n");
    }
};

int main(){
    thrust::device_vector<int> d_vec(3);
    d_vec[0] = 0; d_vec[1] = 1; d_vec[2] = 2;
    thrust::for_each(d_vec.begin(), d_vec.end(), printf_functor());
}

我用nvcc -arch=sm_20 fe.cu编译。

当我使用./a.out运行时，我得到以下输出：

terminate called after throwing an instance of 'thrust::system::system_error'
  what():  unspecified launch failure
Aborted

以下是用于运行代码的GPU上的一些信息：

   --- General Information for device 0 ---
Name:  Tesla C2075
Compute capability:  2.0
Clock rate:  1147000
Device copy overlap:  Enabled
Kernel execution timeout :  Disabled
   --- Memory Information for device 0 ---
Total global mem:  5636554752
Total constant Mem:  65536
Max mem pitch:  2147483647
Texture Alignment:  512
   --- MP Information for device 0 ---
Multiprocessor count:  14
Shared mem per mp:  49152
Registers per mp:  32768
Threads in warp:  32
Max threads per block:  1024
Max thread dimensions:  (1024, 1024, 64)
Max grid dimensions:  (65535, 65535, 65535)

Answer 1

可能你的代码意味着这个：

    printf("%d\n", x);

而不是：

    printf("%d\n");

当我对您的代码进行更改时，它会为我编译并成功运行。

我确认文档中存在错误，并会在thrust googlegroup thrust-users上报告。

推力for_each示例没有运行

1 个答案: