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178 Module Documentation 4.30.2.28 cuMemFreeHost (void ∗ p) Frees the memory space pointed to by p, which must have been returned by a previous call to cuMemAllocHost(). Parameters: p - Pointer to memory to free 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, cuMemcpy2DAsync, cuMemcpy2DUnaligned, cuMemcpy3D, cuMemcpy3DAsync, cuMemcpyAtoA, cuMemcpyAtoD, cuMemcpyAtoH, cuMemcpyAto- HAsync, cuMemcpyDtoA, cuMemcpyDtoD, cuMemcpyDtoDAsync, cuMemcpyDtoH, cuMemcpyDtoHAsync, cuMemcpyHtoA, cuMemcpyHtoAAsync, cuMemcpyHtoD, cuMemcpyHtoDAsync, cuMemFree, cuMemGetAddressRange, cuMemGetInfo, cuMemHostAlloc, cuMemHostGetDevicePointer, cuMemsetD2D8, cuMemsetD2D16, cuMemsetD2D32, cuMemsetD8, cuMemsetD16, cuMemsetD32 4.30.2.29 cuMemGetAddressRange (CUdeviceptr ∗ pbase, unsigned int ∗ psize, CUdeviceptr dptr) Returns the base address in ∗pbase and size in ∗psize of the allocation by cuMemAlloc() or cuMemAllocPitch() that contains the input pointer dptr. Both parameters pbase and psize are optional. If one of them is NULL, it is ignored. Parameters: pbase - Returned base address psize - Returned size of device memory allocation dptr - Device pointer to query 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, cuMemcpy2DAsync, cuMemcpy2DUnaligned, cuMemcpy3D, cuMemcpy3DAsync, cuMemcpyAtoA, cuMemcpyAtoD, cuMemcpyAtoH, cuMemcpyAto- HAsync, cuMemcpyDtoA, cuMemcpyDtoD, cuMemcpyDtoDAsync, cuMemcpyDtoH, cuMemcpyDtoHAsync, cuMemcpyHtoA, cuMemcpyHtoAAsync, cuMemcpyHtoD, cuMemcpyHtoDAsync, cuMemFree, cuMemFree- Host, cuMemGetInfo, cuMemHostAlloc, cuMemHostGetDevicePointer, cuMemsetD2D8, cuMemsetD2D16, cuMemsetD2D32, cuMemsetD8, cuMemsetD16, cuMemsetD32 Generated for NVIDIA CUDA Library by Doxygen
4.30 Memory Management 179 4.30.2.30 cuMemGetInfo (unsigned int ∗ free, unsigned int ∗ total) Returns in ∗free and ∗total respectively, the free and total amount of memory available for allocation by the CUDA context, in bytes. Parameters: free - Returned free memory in bytes total - Returned total memory in bytes 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, cuMemcpy2DAsync, cuMemcpy2DUnaligned, cuMemcpy3D, cuMemcpy3DAsync, cuMemcpyAtoA, cuMemcpyAtoD, cuMemcpyAtoH, cuMemcpyAto- HAsync, cuMemcpyDtoA, cuMemcpyDtoD, cuMemcpyDtoDAsync, cuMemcpyDtoH, cuMemcpyDtoHAsync, cuMemcpyHtoA, cuMemcpyHtoAAsync, cuMemcpyHtoD, cuMemcpyHtoDAsync, cuMemFree, cuMemFree- Host, cuMemGetAddressRange, cuMemHostAlloc, cuMemHostGetDevicePointer, cuMemsetD2D8, cuMemsetD2D16, cuMemsetD2D32, cuMemsetD8, cuMemsetD16, cuMemsetD32 4.30.2.31 cuMemHostAlloc (void ∗∗ pp, size_t bytesize, unsigned int Flags) Allocates bytesize bytes of host memory that is page-locked and accessible to the device. The driver tracks the virtual memory ranges allocated with this function and automatically accelerates calls to functions such as cuMemcpyHtoD(). Since the memory can be accessed directly by the device, it can be read or written with much higher bandwidth than pageable memory obtained with functions such as malloc(). Allocating excessive amounts of pinned memory may degrade system performance, since it reduces the amount of memory available to the system for paging. As a result, this function is best used sparingly to allocate staging areas for data exchange between host and device. The Flags parameter enables different options to be specified that affect the allocation, as follows. • CU_MEMHOSTALLOC_PORTABLE: The memory returned by this call will be considered as pinned memory by all CUDA contexts, not just the one that performed the allocation. • CU_MEMHOSTALLOC_DEVICEMAP: Maps the allocation into the CUDA address space. The device pointer to the memory may be obtained by calling cuMemHostGetDevicePointer(). This feature is available only on GPUs with compute capability greater than or equal to 1.1. • CU_MEMHOSTALLOC_WRITECOMBINED: Allocates the memory as write-combined (WC). WC memory can be transferred across the PCI Express bus more quickly on some system configurations, but cannot be read efficiently by most CPUs. WC memory is a good option for buffers that will be written by the CPU and read by the GPU via mapped pinned memory or host->device transfers. All of these flags are orthogonal to one another: a developer may allocate memory that is portable, mapped and/or write-combined with no restrictions. 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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108 Module Documentation Note: Note
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110 Module Documentation 4.20 Data
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112 Module Documentation • typede
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114 Module Documentation cudaErrorI
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116 Module Documentation 4.21 CUDA
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118 Module Documentation 4.23 Devic
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120 Module Documentation • CU_DEV
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122 Module Documentation typedef st
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124 Module Documentation 4.24 Versi
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126 Module Documentation Returns: N
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Page 164 and 165: 148 Module Documentation Parameters
Page 166 and 167: 150 Module Documentation Copies mem
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Page 182 and 183: 166 Module Documentation If dstMemo
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Page 190 and 191: 174 Module Documentation Returns: N
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Page 220 and 221: 204 Module Documentation The Flags
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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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Notice ALL NVIDIA DESIGN SPECIFICAT
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