CUDA的获取设备详细信息

末蓝、 2022-08-08 03:31 269阅读 0赞

首先介绍一下开发环境，Visual Studio 2008 + [CUDA Wizard for Visual Studio][]. 确保显卡支持CUDA（GeForce 8系列之后，否则只能用模拟模式）并安装CUDA DDK及CUDA Toolkit。  
 安装完CUDA Wizard for Visual Studio之后，如果编译运行时出现"无法找到cutil32D.dll"的错误，则需要将安装的CUDA的sdk的路径加到系统环境变量中：

例如C:\\Program Files\\NVIDIA Corporation\\NVIDIA CUDA SDK\\bin\\win32\\  
下的  
├─Debug  
├─EmuDebug  
├─EmuRelease  
└─Release

几个目录都加入到系统环境变量Path中，这样才能在运行程序的时候找到相应的dll库。  
  
然后就可以在VS下直接编译CUDA程序了（\*.cu)。以下是一个CUDA初始化的程序。

**\[cpp\]** [view plain][] [copy][view plain]

1.  \#include <stdio.h>
2.  \#include <cuda\_runtime.h>
3.  
4.  **bool** InitCUDA() 
5.  \{ 
6.  **int** count; 
7.   cudaGetDeviceCount(&count); 
8.  **if**(count==0) 
9.   \{ 
10.  fprintf(stderr,"There is no device.\\n"); 
11. **return****false**; 
12.  \} 
13. **int** i; 
14. **for**(i=0;i<count;i++) 
15.  \{ 
16.  cudaDeviceProp prop; 
17. **if**(cudaGetDeviceProperties(&prop,i) == cudaSuccess) 
18.  \{ 
19. **if**(prop.major>=1) 
20.  \{ 
21. //枚举详细信息
22.  printf("Identify: %s\\n",prop.name); 
23.  printf("Host Memory: %d\\n",prop.canMapHostMemory); 
24.  printf("Clock Rate: %d khz\\n",prop.clockRate); 
25.  printf("Compute Mode: %d\\n",prop.computeMode); 
26.  printf("Device Overlap: %d\\n",prop.deviceOverlap); 
27.  printf("Integrated: %d\\n",prop.integrated); 
28.  printf("Kernel Exec Timeout Enabled: %d\\n",prop.kernelExecTimeoutEnabled); 
29.  printf("Max Grid Size: %d \* %d \* %d\\n",prop.maxGridSize\[0\],prop.maxGridSize\[1\],prop.maxGridSize\[2\]); 
30.  printf("Max Threads Dim: %d \* %d \* %d\\n",prop.maxThreadsDim\[0\],prop.maxThreadsDim\[1\],prop.maxThreadsDim\[2\]); 
31.  printf("Max Threads per Block: %d\\n",prop.maxThreadsPerBlock); 
32.  printf("Maximum Pitch: %d bytes\\n",prop.memPitch); 
33.  printf("Minor Compute Capability: %d\\n",prop.minor); 
34.  printf("Number of Multiprocessors: %d\\n",prop.multiProcessorCount); 
35.  printf("32bit Registers Availble per Block: %d\\n",prop.regsPerBlock); 
36.  printf("Shared Memory Available per Block: %d bytes\\n",prop.sharedMemPerBlock); 
37.  printf("Alignment Requirement for Textures: %d\\n",prop.textureAlignment); 
38.  printf("Constant Memory Available: %d bytes\\n",prop.totalConstMem); 
39.  printf("Global Memory Available: %d bytes\\n",prop.totalGlobalMem); 
40.  printf("Warp Size: %d threads\\n",prop.warpSize); 
41. **break**; 
42.  \} 
43.  \} 
44.  \} 
45. **if**(i==count) 
46.  \{ 
47.  fprintf(stderr,"There is no device supporting CUDA.\\n"); 
48. **return****false**; 
49.  \} 
50.  cudaSetDevice(i); 
51. **return****true**; 
52. \} 
53. 
54. **void** main() 
55. \{ 
56. **if**(!InitCUDA()) 
57.  \{ 
58.  getchar(); 
59. **return**; 
60.  \} 
61.  printf("CUDA initialized.\\n"); 
62.  getchar(); 
63. \}

运行结果如下：  
![E6_8D_95_E8_8E_B7.PNG][]

[CUDA Wizard for Visual Studio]: http://blog.csdn.net/OpenHero/archive/2008/05/20/2463474.aspx
[view plain]: http://blog.csdn.net/augusdi/article/details/12188531#
[E6_8D_95_E8_8E_B7.PNG]: /images/20220805/ba4c8d8c41564a579fb531efcd086c95.png