CUDALockedPageAllocator< T, ULPHA > Struct Template Reference

allocator locks memory pages allocated by ULPHA More...

Inheritance diagram for CUDALockedPageAllocator< T, ULPHA >:

Collaboration diagram for CUDALockedPageAllocator< T, ULPHA >:

Classes
struct	rebind

Public Types
using	value_type = typename ULPHA::value_type
using	size_type = typename ULPHA::size_type
using	pointer = typename ULPHA::pointer
using	const_pointer = typename ULPHA::const_pointer

Public Member Functions
	CUDALockedPageAllocator ()=default
template<class U , class V >
	CUDALockedPageAllocator (const CUDALockedPageAllocator< U, V > &)
value_type *	allocate (std::size_t n)
void	deallocate (value_type *pt, std::size_t n)

Detailed Description

template<typename T, class ULPHA = std::allocator<T>>
struct qmcplusplus::CUDALockedPageAllocator< T, ULPHA >

allocator locks memory pages allocated by ULPHA

Template Parameters

T	data type
ULPHA	host memory allocator using unlocked page

ULPHA cannot be CUDAHostAllocator

Definition at line 242 of file CUDAallocator.hpp.

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Class Documentation

qmcplusplus::CUDALockedPageAllocator::rebind

struct qmcplusplus::CUDALockedPageAllocator::rebind

template<typename T, class ULPHA = std::allocator<T>>
template<class U, class V>
struct qmcplusplus::CUDALockedPageAllocator< T, ULPHA >::rebind< U, V >

Definition at line 255 of file CUDAallocator.hpp.

Collaboration diagram for CUDALockedPageAllocator< T, ULPHA >::rebind< U, V >:

Class Members
typedef CUDALockedPageAllocator< U, V >	other

Member Typedef Documentation

const_pointer

using const_pointer = typename ULPHA::const_pointer

Definition at line 247 of file CUDAallocator.hpp.

pointer

using pointer = typename ULPHA::pointer

Definition at line 246 of file CUDAallocator.hpp.

size_type

using size_type = typename ULPHA::size_type

Definition at line 245 of file CUDAallocator.hpp.

value_type

using value_type = typename ULPHA::value_type

Definition at line 244 of file CUDAallocator.hpp.

Constructor & Destructor Documentation

CUDALockedPageAllocator() [1/2]

CUDALockedPageAllocator ( )

default

CUDALockedPageAllocator() [2/2]

CUDALockedPageAllocator ( const CUDALockedPageAllocator< U, V > &  )

inline

Definition at line 251 of file CUDAallocator.hpp.

  {}

Member Function Documentation

allocate()

value_type* allocate ( std::size_t  n )

inline

Definition at line 260 of file CUDAallocator.hpp.

References qmcplusplus::cudaErrorCheck(), cudaHostRegister, cudaHostRegisterDefault, and qmcplusplus::n.

  {
    static_assert(std::is_same<T, value_type>::value, "CUDALockedPageAllocator and ULPHA data types must agree!");
    value_type* pt = ULPHA::allocate(n);
    cudaErrorCheck(cudaHostRegister(pt, n * sizeof(T), cudaHostRegisterDefault),
                   "cudaHostRegister failed in CUDALockedPageAllocator!");
    return pt;
  }

deallocate()

void deallocate ( value_type *  pt, std::size_t  n  )

inline

Definition at line 269 of file CUDAallocator.hpp.

References qmcplusplus::cudaErrorCheck(), cudaHostUnregister, and qmcplusplus::n.

  {
    cudaErrorCheck(cudaHostUnregister(pt), "cudaHostUnregister failed in CUDALockedPageAllocator!");
    ULPHA::deallocate(pt, n);
  }

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The documentation for this struct was generated from the following file:

• /home/pk7/projects/qmc/for_cron_doxygen/qmcpack/src/Platforms/CUDA/CUDAallocator.hpp