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162 Module Documentation For device pointers, the starting address is CUdeviceptr dstStart = dstDevice+dstY*dstPitch+dstXInBytes; For CUDA arrays, dstXInBytes must be evenly divisible by the array element size. • WidthInBytes and Height specify the width (in bytes) and height of the 2D copy being performed. Any pitches must be greater than or equal to WidthInBytes. cuMemcpy2D() returns an error if any pitch is greater than the maximum allowed (CU_DEVICE_ATTRIBUTE_- MAX_PITCH). cuMemAllocPitch() passes back pitches that always work with cuMemcpy2D(). On intra-device memory copies (device ? device, CUDA array ? device, CUDA array ? CUDA array), cuMemcpy2D() may fail for pitches not computed by cuMemAllocPitch(). cuMemcpy2DUnaligned() does not have this restriction, but may run significantly slower in the cases where cuMemcpy2D() would have returned an error code. cuMemcpy2DAsync() is asynchronous and can optionally be associated to a stream by passing a non-zero hStream argument. It only works on page-locked host memory and returns an error if a pointer to pageable memory is passed as input. Parameters: pCopy - Parameters for the memory copy hStream - Stream identifier Returns: Note: CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_- ERROR_INVALID_CONTEXT, CUDA_ERROR_INVALID_VALUE See also: Note that this function may also return error codes from previous, asynchronous launches. cuArray3DCreate, cuArray3DGetDescriptor, cuArrayCreate, cuArrayDestroy, cuArrayGetDescriptor, cuMemAlloc, cuMemAllocHost, cuMemAllocPitch, cuMemcpy2D, cuMemcpy2DUnaligned, cuMemcpy3D, cuMemcpy3DAsync, cuMemcpyAtoA, cuMemcpyAtoD, cuMemcpyAtoH, cuMemcpyAtoHAsync, cuMemcpyDtoA, cuMemcpyDtoD, cuMemcpyDtoDAsync, cuMemcpyDtoH, cuMemcpyDtoHAsync, cuMemcpyHtoA, cuMemcpyHtoAAsync, cuMemcpyHtoD, cuMemcpyHtoDAsync, cuMemFree, cuMemFreeHost, cuMemGetAddress- Range, cuMemGetInfo, cuMemHostAlloc, cuMemHostGetDevicePointer, cuMemsetD2D8, cuMemsetD2D16, cuMemsetD2D32, cuMemsetD8, cuMemsetD16, cuMemsetD32 4.30.2.11 cuMemcpy2DUnaligned (const CUDA_MEMCPY2D ∗ pCopy) Perform a 2D memory copy according to the parameters specified in pCopy. The CUDA_MEMCPY2D structure is defined as: typedef struct CUDA_MEMCPY2D_st { unsigned int srcXInBytes, srcY; CUmemorytype srcMemoryType; const void *srcHost; Generated for NVIDIA CUDA Library by Doxygen
4.30 Memory Management 163 CUdeviceptr srcDevice; CUarray srcArray; unsigned int srcPitch; unsigned int dstXInBytes, dstY; CUmemorytype dstMemoryType; void *dstHost; CUdeviceptr dstDevice; CUarray dstArray; unsigned int dstPitch; unsigned int WidthInBytes; unsigned int Height; } CUDA_MEMCPY2D; where: • srcMemoryType and dstMemoryType specify the type of memory of the source and destination, respectively; CUmemorytype_enum is defined as: typedef enum CUmemorytype_enum { CU_MEMORYTYPE_HOST = 0x01, CU_MEMORYTYPE_DEVICE = 0x02, CU_MEMORYTYPE_ARRAY = 0x03 } CUmemorytype; If srcMemoryType is CU_MEMORYTYPE_HOST, srcHost and srcPitch specify the (host) base address of the source data and the bytes per row to apply. srcArray is ignored. If srcMemoryType is CU_MEMORYTYPE_DEVICE, srcDevice and srcPitch specify the (device) base address of the source data and the bytes per row to apply. srcArray is ignored. If srcMemoryType is CU_MEMORYTYPE_ARRAY, srcArray specifies the handle of the source data. srcHost, srcDevice and srcPitch are ignored. If dstMemoryType is CU_MEMORYTYPE_HOST, dstHost and dstPitch specify the (host) base address of the destination data and the bytes per row to apply. dstArray is ignored. If dstMemoryType is CU_MEMORYTYPE_DEVICE, dstDevice and dstPitch specify the (device) base address of the destination data and the bytes per row to apply. dstArray is ignored. If dstMemoryType is CU_MEMORYTYPE_ARRAY, dstArray specifies the handle of the destination data. dstHost, dstDevice and dstPitch are ignored. • srcXInBytes and srcY specify the base address of the source data for the copy. For host pointers, the starting address is void* Start = (void*)((char*)srcHost+srcY*srcPitch + srcXInBytes); For device pointers, the starting address is Generated for NVIDIA CUDA Library by Doxygen
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NVIDIA CUDA Reference Manual Versio
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ii CONTENTS 4.4.2.6 cudaSetDeviceFl
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iv CONTENTS 4.9.2 Function Document
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vi CONTENTS 4.17.2.3 cudaBindTextur
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viii CONTENTS 4.26.2.2 cuModuleGetG
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x CONTENTS 4.30.2.35 cuMemsetD2D16
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xii CONTENTS 4.37.2.5 cuD3D10Resour
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xiv CONTENTS 5.3 CUDA_MEMCPY2D_st S
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2 Deprecated List Global cudaD3D9Re
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4 Deprecated List Global cuD3D10Res
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6 Module Index Direct3D 9 Interoper
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8 Data Structure Index Generated fo
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10 Module Documentation 4.2 Thread
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12 Module Documentation Note: Note
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14 Module Documentation 4.4.2.2 cud
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16 Module Documentation Parameters:
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18 Module Documentation 4.5 Stream
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20 Module Documentation 4.6 Event M
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24 Module Documentation 4.7 Executi
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28 Module Documentation 4.8 Memory
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30 Module Documentation • cudaErr
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32 Module Documentation Returns: No
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36 Module Documentation struct cuda
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38 Module Documentation 4.8.2.14 cu
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42 Module Documentation Returns: No
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46 Module Documentation See also: c
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48 Module Documentation kind - Type
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50 Module Documentation hOffset - S
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52 Module Documentation src - Sourc
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54 Module Documentation IMPORTANT N
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58 Module Documentation 4.9 OpenGL
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60 Module Documentation target - Id
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62 Module Documentation Returns: cu
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66 Module Documentation 4.11 Direct
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68 Module Documentation • The pri
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70 Module Documentation 4.12.2 Func
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72 Module Documentation flags - Par
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74 Module Documentation If pResourc
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76 Module Documentation • cudaD3D
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78 Module Documentation 4.13 Direct
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80 Module Documentation • Resourc
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82 Module Documentation Maps the co
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92 Module Documentation 4.16 Graphi
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94 Module Documentation • cudaGra
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96 Module Documentation 4.17 Textur
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98 Module Documentation Note: See a
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100 Module Documentation See also:
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102 Module Documentation 4.19 C++ A
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104 Module Documentation 4.19.2.2 t
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106 Module Documentation array - Me
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110 Module Documentation 4.20 Data
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Page 136 and 137: 120 Module Documentation • CU_DEV
Page 138 and 139: 122 Module Documentation typedef st
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Page 164 and 165: 148 Module Documentation Parameters
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Page 174 and 175: 158 Module Documentation The pitch
Page 176 and 177: 160 Module Documentation CUdevicept
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Page 182 and 183: 166 Module Documentation If dstMemo
Page 184 and 185: 168 Module Documentation If srcMemo
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214 Module Documentation 4.36 Direc
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216 Module Documentation • CU_GRA
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218 Module Documentation Maps the c
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220 Module Documentation If pResour
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222 Module Documentation 4.37.2.6 c
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226 Module Documentation 4.38 Direc
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228 Module Documentation Not all Di
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230 Module Documentation resources
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232 Module Documentation Returns: N
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234 Module Documentation 4.40 Data
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236 Module Documentation • enum C
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238 Module Documentation • typede
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240 Module Documentation 4.40.2.3 t
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242 Module Documentation 4.40.3.3 e
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244 Module Documentation CU_DEVICE_
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246 Module Documentation Enumerator
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248 Data Structure Documentation 5.
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252 Data Structure Documentation So
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Index C++ API Routines, 102 Context
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264 INDEX CUDA_TYPES, 239 CU_MEMHOS
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266 INDEX CUDA_ERROR_UNMAP_FAILED C
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268 INDEX CUDA_TYPES, 239 cudaBindT
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270 INDEX cudaGetLastError CUDART_E
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272 INDEX cudaGraphicsRegisterFlags
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274 INDEX CUdevice_attribute CUDA_T
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276 INDEX CUMEM, 164 cuMemcpy3DAsyn
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