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我正在使用 Cuda 驱动程序 api，现在我遇到了关于创建 Cuda 纹理对象的问题，它总是返回 CUDA_ERROR_INVALUD_VALUE。

我发现函数 cuTexObjectCreate 被宏包装：

#if __CUDA_API_VERSION >= 5000
...function decl...
#endif

而我由 cuCtxCreate_v2 创建的 Cuda 上下文总是返回 api 版本 3020。这是否意味着我应该创建一个高版本的上下文？我应该调用哪个函数？或者是别的什么？

这是示例代码：

struct CudaDriverTest
{
    CUdevice m_device = 0;
    CUcontext m_primaryContext = nullptr;
    CUcontext m_context = nullptr;
    CUarray m_array = nullptr;
    CUtexObject m_texture = 0;
    CUdeviceptr m_output = 0;

    CudaDriverTest(size_t w, size_t h, float* data) :
        m_image(w, h, QImage::Format_Grayscale8)
    {
        // begin cuda driver api staff
        HANDLE_ERROR(cuInit(0));
        int deviceCount = 0;
        HANDLE_ERROR(cuDeviceGetCount(&deviceCount));
        assert(deviceCount == 1);
        HANDLE_ERROR(cuDeviceGet(&m_device, 0));
        char name[256];
        HANDLE_ERROR(cuDeviceGetName(name, 256, m_device));
        std::cout << "device name:" << name << std::endl;
        int major = 0;
        int minor = 0;
        HANDLE_ERROR(cuDeviceComputeCapability(&major, &minor, m_device));
        std::cout << "major compute capability : " << major << ", minor compute capability : " << minor << std::endl;
        HANDLE_ERROR(cuCtxCreate(&m_context, CU_CTX_SCHED_AUTO, m_device));
        std::uint32_t version;
        HANDLE_ERROR(cuCtxGetApiVersion(m_context, &version));
        std::cout << "context api version : " << version << std::endl;
        // array
        CUDA_ARRAY_DESCRIPTOR arrDesc;
        memset(&arrDesc, 0, sizeof(arrDesc));
        arrDesc.Format = CUarray_format::CU_AD_FORMAT_FLOAT;
        arrDesc.NumChannels = 1;
        arrDesc.Width = w;
        arrDesc.Height = h;
        HANDLE_ERROR(cuArrayCreate(&m_array, &arrDesc));
        CUDA_MEMCPY2D cpy2d;
        memset(&cpy2d, 0, sizeof(cpy2d));
        cpy2d.srcMemoryType = CUmemorytype::CU_MEMORYTYPE_HOST;
        cpy2d.srcHost = data;
        cpy2d.srcPitch = w * sizeof(float);
        cpy2d.dstMemoryType = CUmemorytype::CU_MEMORYTYPE_ARRAY;
        cpy2d.dstArray = m_array;
        cpy2d.dstPitch = w * sizeof(float);
        cpy2d.WidthInBytes = w * sizeof(float);
        cpy2d.Height = h;
        HANDLE_ERROR(cuMemcpy2D(&cpy2d));
        // texture object
        CUDA_RESOURCE_DESC resDesc;
        memset(&resDesc, 0, sizeof(resDesc));
        resDesc.resType = CUresourcetype::CU_RESOURCE_TYPE_ARRAY;
        resDesc.res.array.hArray = m_array;
        CUDA_TEXTURE_DESC texDesc;
        memset(&texDesc, 0, sizeof(texDesc));
        texDesc.addressMode[0] = CUaddress_mode::CU_TR_ADDRESS_MODE_WRAP;
        texDesc.addressMode[1] = CUaddress_mode::CU_TR_ADDRESS_MODE_WRAP;
        texDesc.addressMode[2] = CUaddress_mode::CU_TR_ADDRESS_MODE_WRAP;
        texDesc.filterMode = CUfilter_mode::CU_TR_FILTER_MODE_LINEAR;
        texDesc.flags = CU_TRSF_READ_AS_INTEGER;
        CUDA_RESOURCE_VIEW_DESC viewDesc;
        memset(&viewDesc, 0, sizeof(viewDesc));
        viewDesc.width = w;
        viewDesc.height = h;
        viewDesc.format = CUresourceViewFormat::CU_RES_VIEW_FORMAT_FLOAT_1X32;
        HANDLE_ERROR(cuTexObjectCreate(&m_texture, &resDesc, &texDesc, &viewDesc));
        // output
        HANDLE_ERROR(cuMemAlloc(&m_output, w * h * sizeof(float)));
    }
}

PS：工作环境：GTX960；Cuda7.5；windows7-x64；visual studio 2013；

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1 回答 1

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这是我的错，我没有正确 ZeroMemory 的参数。PS。感谢@talonmies 编辑问题。

于 2016-08-09T08:34:09.187 回答