構建opencl內核失敗

Question

當我在我的OpenCl代碼中使用clBuildProgram ，它失敗並顯示錯誤代碼-11而沒有任何日志信息。

這是我的代碼的樣子：

  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，只是偶然的機會你們可以在上面的行中看到任何錯誤或奇怪的東西嗎？

謝謝，

埃里克。

Answer 1

看起來您可能正在使用clGetProgramBuildInfo（）錯誤。 第一次調用它時，它應該告訴主機上所需的緩沖區大小：

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

然后在主機上分配內存：

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

然后回想一下clGetProgramBuildInfo（）：

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

Answer 2

我修改了代碼並增加了緩沖區大小：

  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);
    }

我現在得到這個：

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。

謝謝您的幫助。