Detailed Description

Definition at line 58 of file CudaMemory.cuh.

Inheritance diagram for CudaMemory:

Public Member Functions
bool	copyDeviceToDevice (const CudaMemory &m)
	copy from GPU to GPU buffer directly More...

virtual bool	flush ()
	flush the memory More...

virtual bool	allocate (size_t sz)
	allocate memory More...

virtual void	destroy ()
	destroy memory More...

virtual bool	copy (const memory &m)
	copy from a General device More...

virtual size_t	size () const
	the the size of the allocated memory More...

virtual bool	resize (size_t sz)
	resize the momory allocated More...

virtual void *	getPointer ()
	get a readable pointer with the data More...

virtual const void *	getPointer () const
	get a readable pointer with the data More...

virtual void *	getDevicePointer ()
	get a readable pointer with the data More...

virtual void	hostToDevice ()
	Move memory from host to device. More...

virtual void	deviceToHost ()
	Move memory from device to host. More...

virtual void	deviceToHost (size_t start, size_t stop)
	Move memory from device to host, just the selected chunk. More...

virtual void	hostToDevice (size_t start, size_t top)
	Move memory from host to device, just the selected chunk. More...

void	hostToDevice (CudaMemory &mem)
	host to device using external memory (this host memory is copied into mem device memory) More...

void	deviceToHost (CudaMemory &mem)
	device to host using external memory (this device memory is copied into mem host memory) More...

virtual void	fill (unsigned char c)
	fill the buffer with a byte More...

void	isNotSync ()

virtual void	incRef ()
	Increment the reference counter.

virtual void	decRef ()
	Decrement the reference counter.

virtual long int	ref ()
	Return the reference counter.

bool	isInitialized ()
	Allocated Memory is never initialized. More...

CudaMemory &	operator= (const CudaMemory &mem)

	CudaMemory (const CudaMemory &mem)

	CudaMemory (CudaMemory &&mem) EXCEPT_MC

	CudaMemory ()
	Constructor.

	CudaMemory (size_t sz)
	Constructor.

	~CudaMemory ()
	Destructor.

void	deviceToDevice (void *ptr, size_t start, size_t stop, size_t offset)
	copy memory from device to device More...

void	swap (CudaMemory &mem)
	Swap the memory. More...

void *	toKernel ()
	return the device memory More...

Public Member Functions inherited from memory
virtual	~memory ()
	destructor More...

Static Public Member Functions
static constexpr bool	isDeviceHostSame ()
	Return true if the device and the host pointer are the same. More...

Private Member Functions
void	allocate_host (size_t sz) const
	Allocate an host buffer. More...

bool	copyFromPointer (const void *ptr)
	copy from Pointer to GPU More...

Private Attributes
bool	is_hm_sync
	Is the host memory synchronized with the GPU memory.

size_t	sz
	Size of the memory.

void *	dm
	device memory

void *	hm
	host memory

size_t	ref_cnt
	Reference counter.

Member Function Documentation

◆ allocate()

bool CudaMemory::allocate ( size_t sz )

virtual

allocate memory

Allocate a chunk of memory.

Allocate a chunk of memory

Parameters

sz	size of the chunk of memory to allocate in byte

Allocate the device memory

Implements memory.

Definition at line 38 of file CudaMemory.cu.

◆ allocate_host()

void CudaMemory::allocate_host ( size_t sz ) const

private

Allocate an host buffer.

Allocate the host buffer.

Allocate the host buffer

Definition at line 133 of file CudaMemory.cu.

◆ copy()

bool CudaMemory::copy ( const memory & m )

virtual

copy from a General device

copy from memory

Parameters

m	a memory interface

Here we try to cast memory into OpenFPMwdeviceCudaMemory

if we fail we get the pointer and simply copy from the pointer

Implements memory.

Definition at line 214 of file CudaMemory.cu.

◆ copyDeviceToDevice()

bool CudaMemory::copyDeviceToDevice ( const CudaMemory & m )

copy from GPU to GPU buffer directly

copy from device to device

copy a piece of memory from device to device

Parameters

CudaMemory from where to copy

Returns: true is success

The source buffer is too big to copy it

Copy the memory

Definition at line 187 of file CudaMemory.cu.

◆ copyFromPointer()

bool CudaMemory::copyFromPointer ( const void * ptr )

private

copy from Pointer to GPU

copy the data from a pointer

Parameters

ptr

Returns: true if success

Definition at line 157 of file CudaMemory.cu.

◆ destroy()

void CudaMemory::destroy ( )

virtual

destroy memory

destroy a chunk of memory

Destroy a chunk of memory

Release the allocated memory

we invalidate hm

Implements memory.

Definition at line 80 of file CudaMemory.cu.

◆ deviceToDevice()

void CudaMemory::deviceToDevice	(	void *	ptr,
		size_t	start,
		size_t	stop,
		size_t	offset
	)

copy memory from device to device

Parameters

external	device pointer
start	source starting point (where it start to copy)
stop	end point
offset	where to copy in the device pointer

Definition at line 119 of file CudaMemory.cu.

◆ deviceToHost() [1/3]

void CudaMemory::deviceToHost ( )

virtual

Move memory from device to host.

Return a readable pointer with your data.

Returns: a readable pointer with your data

copy from device to host memory

Implements memory.

Definition at line 367 of file CudaMemory.cu.

◆ deviceToHost() [2/3]

void CudaMemory::deviceToHost	(	size_t	start,
		size_t	stop
	)

virtual

Move memory from device to host, just the selected chunk.

Return a readable pointer with your data.

Returns: a readable pointer with your data

copy from device to host memory

Implements memory.

Definition at line 444 of file CudaMemory.cu.

◆ deviceToHost() [3/3]

void CudaMemory::deviceToHost ( CudaMemory & mem )

device to host using external memory (this device memory is copied into mem host memory)

It transfer to device memory from the host of another memory.

Parameters

mem	the other memory object

copy from device to host memory

Definition at line 386 of file CudaMemory.cu.

◆ fill()

void CudaMemory::fill ( unsigned char c )

virtual

fill the buffer with a byte

fill host and device memory with the selected byte

Implements memory.

Definition at line 479 of file CudaMemory.cu.

◆ flush()

bool CudaMemory::flush ( )

virtual

flush the memory

Move the memory into device.

Returns: true if the memory is correctly flushed

copy from host to device memory

Implements memory.

Definition at line 15 of file CudaMemory.cu.

◆ getDevicePointer()

void * CudaMemory::getDevicePointer ( )

virtual

get a readable pointer with the data

Return the CUDA device pointer.

Returns: CUDA device pointer

Implements memory.

Definition at line 497 of file CudaMemory.cu.

◆ getPointer() [1/2]

void * CudaMemory::getPointer ( )

virtual

get a readable pointer with the data

Return a readable pointer with your data.

Returns: a readable pointer with your data

Implements memory.

Definition at line 352 of file CudaMemory.cu.

◆ getPointer() [2/2]

const void * CudaMemory::getPointer ( ) const

virtual

get a readable pointer with the data

Return a readable pointer with your data.

Returns: a readable pointer with your data

Implements memory.

Definition at line 466 of file CudaMemory.cu.

◆ hostToDevice() [1/3]

void CudaMemory::hostToDevice ( )

virtual

Move memory from host to device.

Return a readable pointer with your data.

Returns: a readable pointer with your data

copy from device to host memory

Implements memory.

Definition at line 508 of file CudaMemory.cu.

◆ hostToDevice() [2/3]

void CudaMemory::hostToDevice	(	size_t	start,
		size_t	top
	)

virtual

Move memory from host to device, just the selected chunk.

copy from device to host memory

Implements memory.

Definition at line 425 of file CudaMemory.cu.

◆ hostToDevice() [3/3]

void CudaMemory::hostToDevice ( CudaMemory & mem )

host to device using external memory (this host memory is copied into mem device memory)

It transfer to device memory from the host of another memory.

Parameters

mem	the other memory object

copy from device to host memory

Definition at line 408 of file CudaMemory.cu.

◆ isDeviceHostSame()

static constexpr bool CudaMemory::isDeviceHostSame ( )

inlinestatic

Return true if the device and the host pointer are the same.

Returns: true if they are the same

Definition at line 227 of file CudaMemory.cuh.

◆ isInitialized()

bool CudaMemory::isInitialized ( )

inlinevirtual

Allocated Memory is never initialized.

Returns: false

Implements memory.

Definition at line 156 of file CudaMemory.cuh.

◆ isNotSync()

void CudaMemory::isNotSync ( )

inline

This function notify that the device memory is not sync with the host memory, is called when a task is performed that write on the buffer

Definition at line 131 of file CudaMemory.cuh.

◆ resize()

bool CudaMemory::resize ( size_t sz )

virtual

resize the momory allocated

Resize the allocated memory.

Resize the allocated memory, if request is smaller than the allocated memory is not resized

Parameters

sz size

Returns: true if the resize operation complete correctly

Allocate the device memory if not done yet

Create a new buffer, if sz is bigger than the actual size

copy from the old buffer to the new one

free the old buffer

change to the new buffer

Implements memory.

Definition at line 259 of file CudaMemory.cu.

◆ size()

size_t CudaMemory::size ( ) const

virtual

the the size of the allocated memory

Get the size of the allocated memory.

Get the size of the allocated memory

Returns: the size of the allocated memory

Implements memory.

Definition at line 243 of file CudaMemory.cu.

◆ swap()

void CudaMemory::swap ( CudaMemory & mem )

Swap the memory.

Parameters

mem	memory to swap

Definition at line 528 of file CudaMemory.cu.

◆ toKernel()

void* CudaMemory::toKernel ( )

inline

return the device memory

See also: equivalent to getDevicePointer()

Definition at line 237 of file CudaMemory.cuh.

The documentation for this class was generated from the following files:

openfpm_devices/src/memory/CudaMemory.cuh
openfpm_devices/src/memory/CudaMemory.cu

Detailed Description

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Member Function Documentation

◆ allocate()

◆ allocate_host()

◆ copy()

◆ copyDeviceToDevice()

◆ copyFromPointer()

◆ destroy()

◆ deviceToDevice()

◆ deviceToHost() [1/3]

◆ deviceToHost() [2/3]

◆ deviceToHost() [3/3]

◆ fill()

◆ flush()

◆ getDevicePointer()

◆ getPointer() [1/2]

◆ getPointer() [2/2]

◆ hostToDevice() [1/3]

◆ hostToDevice() [2/3]

◆ hostToDevice() [3/3]

◆ isDeviceHostSame()

◆ isInitialized()

◆ isNotSync()

◆ resize()

◆ size()

◆ swap()

◆ toKernel()