Question

我对OpenCL编程完全陌生，但多年来一直在（嵌入式）C编程。我遇到了clFinish返回-36的问题，其中afaik表示内核无法正常运行。但是，我不能为我的生活找出原因。测试内核在另一个版本中正常运行，两个版本之间的差异似乎可以忽略不计。下面是没有错误检查的代码的简化版本。（否则检查所有返回值并返回CL_SUCCESS）

#define INPUT_ARR_SIZE  128
int inArr[INPUT_ARR_SIZE];

int main()
{
    cl_uint num = 1;
    cl_int ret;
    cl_platform_id platforms[1];
    cl_device_id devices[1];
    cl_context_properties ccp[3];
    cl_context ctx;
    cl_command_queue queue;
    cl_program program;
    cl_kernel kernel;
    cl_mem mem1, mem2;
    cl_int result;

    clGetPlatformIDs(num, platforms, &num);

    printf("%i Platforms\n", num);

    num = 1;

    clGetDeviceIDs(platforms[0], CL_DEVICE_TYPE_GPU, num, devices, &num);

    printf("Devices: %d\n", num);

    ccp[0] = CL_CONTEXT_PLATFORM;
    ccp[1] = (intptr_t)platforms[0];
    ccp[2] = 0;

    ctx = clCreateContext(ccp, 1, devices, NULL, NULL, &ret);

    queue = clCreateCommandQueue(ctx, devices[0], (cl_ulong)0, &ret);

    program = clCreateProgramWithSource(ctx, 1, &KernelSrcPtr, NULL, &ret);

    clBuildProgram(program, 0, NULL, NULL, NULL, NULL);

    printf("Build success\n");

    mem1 = clCreateBuffer(ctx, CL_MEM_READ_WRITE, sizeof(inArr), NULL, &ret);

    mem2 = clCreateBuffer(ctx, CL_MEM_READ_WRITE, sizeof(inArr), NULL, &ret);

    kernel = clCreateKernel(program, "hello", &ret);

    ret = clEnqueueWriteBuffer(queue, mem1, CL_TRUE, 0, sizeof(inArr), inArr, 0, NULL, NULL);

    ret = clSetKernelArg(kernel, 0, sizeof(cl_mem), &mem1);

    ret = clSetKernelArg(kernel, 1, sizeof(cl_mem), &mem2);

    cl_uint num2 = INPUT_ARR_SIZE;
    ret = clEnqueueNDRangeKernel(queue, kernel, 1, 0, (size_t*)&num2, NULL, 0, NULL, NULL);

    ret |= clFinish(queue);
}

这是内核：

const char KernelSrc[] =
                "__kernel void hello(__global const int *mem1, __global int *mem2)\n"\
                "{\n"\
                "   size_t id = get_global_id(0);\n"\
                "   int intm = mem1[id] * 2;\n"\
                "   intm = intm + 5;\n"\
                "   intm = intm * 6;\n"\
                "   mem2[id] = intm / 3;\n"\
                "}\n\n";

另外，有趣的事情发生了，如果我在内核中注释掉mem2[id] = intm / 3;行，程序就永远不会完成它的执行。

任何人都可以帮助我解决这些问题吗？

OpenCL clFinish返回-36

0 个答案: