函数 nppiDotProd_8u64f_C1R 导致 cudaErrorUnknown。我能够正确编译和运行 boxFilterNPP 和 histEqualizationNPP 所以我认为我的系统是健康的。我在 Windows7 上运行 GTX470(计算能力 2.0)、CUDA 5.5 和 VS2012 x64。我还在两个系统上运行了它的许多变体并且遇到了同样的问题。这是代码:
NppGpuComputeCapability capability = nppGetGpuComputeCapability();
NppiSize sizeROI;
sizeROI.width = 640;
sizeROI.height = 480;
int nBufferSize = 0;
NppStatus status = nppiDotProdGetBufferHostSize_8u64f_C1R(sizeROI,&nBufferSize);
if(status != NPP_SUCCESS) return status;
unsigned char *pDeviceBuffer;
cudaError_t err = cudaMalloc((void**)&pDeviceBuffer,nBufferSize);
if(err != cudaSuccess) return err;
int stepByte1 = 0;
Npp8u * buf1 = nppiMalloc_8u_C1(sizeROI.width, sizeROI.height, &stepByte1);
status = nppiSet_8u_C1R(1,buf1,stepByte1,sizeROI);
if(status != NPP_SUCCESS) return status;
int stepByte2 = 0;
Npp8u * buf2 = nppiMalloc_8u_C1(sizeROI.width, sizeROI.height, &stepByte2);
status = nppiSet_8u_C1R(1,buf2,stepByte2,sizeROI);
if(status != NPP_SUCCESS) return status;
err = cudaDeviceSynchronize();
if(err != cudaSuccess) return err;
double dp = 0;
status = nppiDotProd_8u64f_C1R(buf1,stepByte1,buf2,stepByte2,sizeROI,&dp,pDeviceBuffer);
if(status != NPP_SUCCESS) return status;
err = cudaDeviceSynchronize(); // return cudaErrorUnknown
// CUDA memchecker gives me "OutOfRangeStore" exception
if(err != cudaSuccess) return err;
printf("result: %f\n", dp);
nppiFree(buf1);
nppiFree(buf2);
cudaFree(pDeviceBuffer);
对我的问题有任何想法吗?
非常感谢!!