構建opencl內核失敗

Question

當我在我的OpenCl代碼中使用clBuildProgram時，失敗時顯示錯誤代碼-11，沒有任何日誌信息。

這裏是我的代碼如下所示：

ret = clBuildProgram(program, 1, &device_id, NULL, NULL, NULL); 

    if (ret != CL_SUCCESS) 
    { 
     size_t len; 
     char buffer[2048]; 
    cl_build_status bldstatus; 
    printf("\nError %d: Failed to build program executable [ %s ]\n",ret,get_error_string(ret)); 
     ret = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_STATUS, sizeof(bldstatus), (void *)&bldstatus, &len); 
     printf("Build Status %d: %s\n",ret,get_error_string(ret)); 
    printf("INFO: %s\n", get_error_string(bldstatus)); 
     ret = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_OPTIONS, sizeof(buffer), buffer, &len); 
     printf("Build Options %d: %s\n",ret,get_error_string(ret)); 
    printf("INFO: %s\n", buffer); 
     ret = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_LOG, sizeof(buffer), buffer, &len);  
    printf("Build Log %d: %s\n",ret,get_error_string(ret)); 
    printf("%s\n", buffer); 
    (void)infoinfo(platform_id,device_id); 
    exit(1); 
    } 

這裏是輸出的樣子：

Error -11: Failed to build program executable [ CL_BUILD_PROGRAM_FAILURE ] 
Build Status 0: CL_SUCCESS 
INFO: CL_DEVICE_NOT_AVAILABLE 
Build Options 0: CL_SUCCESS 
INFO: 
Build Log -30: CL_INVALID_VALUE 


CL_PLATFORM_NAME : NVIDIA CUDA 
CL_PLATFORM_VERSION : OpenCL 1.1 CUDA 4.2.1 
Device name : Tesla K20m 
Driver version : 319.32 
Global Memory (MB) : 4799 
Global Memory Cache (KB) : 208 
Local Memory (KB) : 48 
Max clock (MHz) : 705 
Max Work Group Size : 1024 
Number of parallel compute cores : 13 
Is the device available : yes 

所以，只是偶然你們可以看到任何錯誤或東西怪異上面的線？

謝謝，

Éric。

Answer 1

它看起來像你可能會使用clGetProgramBuildInfo（）錯誤。第一次被調用時，應該要告訴它需要在主機上的緩衝區的大小：

clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_LOG, NULL, NULL, &len);

然後在主機上分配內存：

char *log = new char[len] //or whatever you use

然後記得clGetProgramBuildInfo（）：

clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_LOG, len, log, null);

Answer 2

我已經修改了代碼，並增加了緩衝區大小：

ret = clBuildProgram(program, 1, &device_id, NULL, NULL, NULL); 

    if (ret != CL_SUCCESS) 
    { 
     size_t len; 
     char buffer[204800]; 
    cl_build_status bldstatus; 
    printf("\nError %d: Failed to build program executable [ %s ]\n",ret,get_error_string(ret)); 
     ret = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_STATUS, sizeof(bldstatus), (void *)&bldstatus, &len); 
     if (ret != CL_SUCCESS) 
      { 
     printf("Build Status error %d: %s\n",ret,get_error_string(ret)); 
     exit(1); 
     }  
    if (bldstatus == CL_BUILD_SUCCESS) printf("Build Status: CL_BUILD_SUCCESS\n"); 
    if (bldstatus == CL_BUILD_NONE) printf("Build Status: CL_BUILD_NONE\n"); 
    if (bldstatus == CL_BUILD_ERROR) printf("Build Status: CL_BUILD_ERROR\n"); 
    if (bldstatus == CL_BUILD_IN_PROGRESS) printf("Build Status: CL_BUILD_IN_PROGRESS\n"); 
     ret = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_OPTIONS, sizeof(buffer), buffer, &len); 
     if (ret != CL_SUCCESS) 
      { 
     printf("Build Options error %d: %s\n",ret,get_error_string(ret)); 
     exit(1); 
     }   
    printf("Build Options: %s\n", buffer); 
     ret = clGetProgramBuildInfo(program, device_id, CL_PROGRAM_BUILD_LOG, sizeof(buffer), buffer, &len);  
     if (ret != CL_SUCCESS) 
      { 
     printf("Build Log error %d: %s\n",ret,get_error_string(ret)); 
     exit(1); 
     }  
    printf("Build Log:\n%s\n", buffer); 
    exit(1); 
    } 

現在我得到這樣的：

Error -11: Failed to build program executable [ CL_BUILD_PROGRAM_FAILURE ] 
Build Status: CL_BUILD_ERROR 
Build Options: 
Build Log: 
:4:85: error: must specify .... 

所以，它的工作原理。

謝謝你的幫助。