MemPoolMalloc Class Reference

#include <PoolMalloc.h>

Inheritance diagram for MemPoolMalloc:

Collaboration diagram for MemPoolMalloc:

Public Member Functions
	MemPoolMalloc (char const *label, size_t aSize)
	~MemPoolMalloc ()
virtual bool	idleTrigger (int shift) const
virtual void	clean (time_t maxage)
virtual int	getStats (MemPoolStats *stats, int accumulate)
virtual int	getInUseCount ()
virtual MemPoolMeter const &	getMeter () const
virtual MemPoolMeter &	getMeter ()
virtual void	flushMetersFull ()
virtual void	flushMeters ()
virtual void *	alloc ()
virtual void	freeOne (void *)
virtual size_t	objectSize () const
virtual char const *	objectType () const
void	zeroBlocks (bool doIt)
int	inUseCount ()
virtual void	setChunkSize (size_t)

Static Public Member Functions
static size_t	RoundedSize (size_t minSize)

Public Attributes
MemImplementingAllocator *	next
size_t	alloc_calls
size_t	free_calls
size_t	saved_calls
size_t	obj_size

Protected Member Functions
virtual void *	allocate ()
virtual void	deallocate (void *, bool aggressive)

Protected Attributes
MemPoolMeter	meter
int	memPID
bool	doZero

Private Attributes
std::stack< void * >	freelist
const char *	label

Detailed Description

Definition at line 36 of file PoolMalloc.h.

Constructor & Destructor Documentation

MemPoolMalloc()

MemPoolMalloc::MemPoolMalloc	(	char const *	label,
		size_t	aSize
	)

Definition at line 91 of file PoolMalloc.cc.

Referenced by getStats().

~MemPoolMalloc()

MemPoolMalloc::~MemPoolMalloc

(

)

Definition at line 95 of file PoolMalloc.cc.

References assert, clean(), Mem::Meter::currentLevel(), MemPoolMeter::inuse, and MemImplementingAllocator::meter.

Member Function Documentation

alloc()

void * MemImplementingAllocator::alloc ( )

virtualinherited

Allocate one element from the pool

Implements MemAllocator.

Definition at line 196 of file Pool.cc.

References MemImplementingAllocator::alloc_calls, MemImplementingAllocator::allocate(), FLUSH_LIMIT, and MemImplementingAllocator::flushMeters().

allocate()

void * MemPoolMalloc::allocate ( )

protectedvirtual

Implements MemImplementingAllocator.

Definition at line 22 of file PoolMalloc.cc.

References MemPoolMeter::alloc, MemAllocator::doZero, freelist, MemPoolMeter::idle, MemPoolMeter::inuse, MemImplementingAllocator::meter, NULL, MemImplementingAllocator::obj_size, MemImplementingAllocator::saved_calls, xcalloc(), and xmalloc.

clean()

void MemPoolMalloc::clean ( time_t  maxage )

virtual

Implements MemImplementingAllocator.

Definition at line 108 of file PoolMalloc.cc.

References MemPoolMeter::alloc, freelist, MemPoolMeter::idle, MemImplementingAllocator::meter, and xfree.

Referenced by ~MemPoolMalloc().

deallocate()

void MemPoolMalloc::deallocate ( void *  obj, bool  aggressive  )

protectedvirtual

Implements MemImplementingAllocator.

Definition at line 44 of file PoolMalloc.cc.

References MemPoolMeter::alloc, MemAllocator::doZero, freelist, MemPoolMeter::idle, MemPoolMeter::inuse, MemImplementingAllocator::meter, MemImplementingAllocator::obj_size, and xfree.

flushMeters()

void MemImplementingAllocator::flushMeters ( )

virtualinherited

Definition at line 118 of file Pool.cc.

References MemImplementingAllocator::alloc_calls, mgb_t::count, MemImplementingAllocator::free_calls, MemPoolMeter::gb_allocated, MemPoolMeter::gb_freed, MemPoolMeter::gb_saved, MemImplementingAllocator::meter, and MemImplementingAllocator::saved_calls.

Referenced by MemImplementingAllocator::alloc(), and MemImplementingAllocator::flushMetersFull().

flushMetersFull()

void MemImplementingAllocator::flushMetersFull ( )

virtualinherited

Definition at line 140 of file Pool.cc.

References mgb_t::bytes, mgb_t::count, MemImplementingAllocator::flushMeters(), MemPoolMeter::gb_allocated, MemPoolMeter::gb_freed, MemPoolMeter::gb_saved, MemImplementingAllocator::getMeter(), and MemImplementingAllocator::obj_size.

Referenced by MemPoolChunked::~MemPoolChunked(), and MemPoolChunked::clean().

freeOne()

void MemImplementingAllocator::freeOne ( void *  obj )

virtualinherited

Free a element allocated by MemImplementingAllocator::alloc()

Implements MemAllocator.

Definition at line 205 of file Pool.cc.

References assert, MemImplementingAllocator::deallocate(), MemImplementingAllocator::free_calls, MemPools::GetInstance(), NULL, MemImplementingAllocator::obj_size, and VALGRIND_CHECK_MEM_IS_ADDRESSABLE.

getInUseCount()

int MemPoolMalloc::getInUseCount ( )

virtual

Implements MemImplementingAllocator.

Definition at line 86 of file PoolMalloc.cc.

References Mem::Meter::currentLevel(), MemPoolMeter::inuse, and MemImplementingAllocator::meter.

getMeter() [1/2]

MemPoolMeter & MemImplementingAllocator::getMeter ( )

virtualinherited

Definition at line 354 of file Pool.cc.

References MemImplementingAllocator::meter.

getMeter() [2/2]

MemPoolMeter const & MemImplementingAllocator::getMeter ( ) const

virtualinherited

Implements MemAllocator.

Definition at line 348 of file Pool.cc.

References MemImplementingAllocator::meter.

Referenced by MemChunk::MemChunk(), MemChunk::~MemChunk(), and MemImplementingAllocator::flushMetersFull().

getStats()

int MemPoolMalloc::getStats ( MemPoolStats *  stats, int  accumulate  )

virtual

Parameters

stats

Object to be filled with statistical data about pool.

Return values

Number

of objects in use, ie. allocated.

Implements MemAllocator.

Definition at line 60 of file PoolMalloc.cc.

References MemPoolMalloc(), MemPoolMeter::alloc, Mem::Meter::currentLevel(), MemPoolMeter::idle, MemPoolMeter::inuse, MemImplementingAllocator::meter, MemImplementingAllocator::obj_size, MemAllocator::objectType(), and Ping::stats.

idleTrigger()

bool MemPoolMalloc::idleTrigger ( int  shift ) const

virtual

Implements MemImplementingAllocator.

Definition at line 102 of file PoolMalloc.cc.

References freelist.

inUseCount()

int MemAllocator::inUseCount ( )

inherited

Definition at line 112 of file Pool.cc.

References MemAllocator::getInUseCount().

Referenced by memInUse(), and memStringCount().

objectSize()

size_t MemImplementingAllocator::objectSize ( ) const

virtualinherited

Implements MemAllocator.

Definition at line 360 of file Pool.cc.

References MemImplementingAllocator::obj_size.

objectType()

char const * MemAllocator::objectType ( ) const

virtualinherited

Definition at line 106 of file Pool.cc.

References MemAllocator::label.

Referenced by cbdataDump(), MemPoolChunked::getStats(), and getStats().

RoundedSize()

size_t MemAllocator::RoundedSize ( size_t  minSize )

staticinherited

Parameters

minSize

Minimum size needed to be allocated.

Return values

n	Smallest size divisible by sizeof(void*)

Definition at line 292 of file Pool.cc.

Referenced by GetStrPool().

setChunkSize()

virtual void MemAllocator::setChunkSize ( size_t  )

inlinevirtualinherited

Allows you tune chunk size of pooling. Objects are allocated in chunks instead of individually. This conserves memory, reduces fragmentation. Because of that memory can be freed also only in chunks. Therefore there is tradeoff between memory conservation due to chunking and free memory fragmentation.

Note

As a general guideline, increase chunk size only for pools that keep very many items for relatively long time.

Reimplemented in MemPoolChunked.

Definition at line 218 of file Pool.h.

Referenced by createRemovalPolicy_lru(), and Mem::Init().

zeroBlocks()

void MemAllocator::zeroBlocks ( bool  doIt )

inlineinherited

Definition at line 205 of file Pool.h.

References MemAllocator::doZero.

Referenced by Mem::AllocatorProxy::getAllocator(), GetStrPool(), and memDataInit().

Member Data Documentation

alloc_calls

size_t MemImplementingAllocator::alloc_calls

inherited

Definition at line 272 of file Pool.h.

Referenced by MemImplementingAllocator::alloc(), and MemImplementingAllocator::flushMeters().

doZero

bool MemAllocator::doZero

protectedinherited

Whether to zero memory on initial allocation and on return to the pool.

We do this on some pools because many object constructors are/were incomplete and we are afraid some code may use the object after free. These probems are becoming less common, so when possible set this to false.

Definition at line 233 of file Pool.h.

Referenced by MemChunk::MemChunk(), allocate(), deallocate(), MemPoolChunked::push(), and MemAllocator::zeroBlocks().

free_calls

size_t MemImplementingAllocator::free_calls

inherited

Definition at line 273 of file Pool.h.

Referenced by MemImplementingAllocator::flushMeters(), and MemImplementingAllocator::freeOne().

freelist

std::stack<void *> MemPoolMalloc::freelist

private

Definition at line 55 of file PoolMalloc.h.

Referenced by allocate(), clean(), deallocate(), and idleTrigger().

label

const char* MemAllocator::label

privateinherited

Definition at line 236 of file Pool.h.

Referenced by MemAllocator::objectType().

memPID

int MemImplementingAllocator::memPID

protectedinherited

Definition at line 268 of file Pool.h.

Referenced by MemImplementingAllocator::MemImplementingAllocator().

meter

MemPoolMeter MemImplementingAllocator::meter

protectedinherited

Definition at line 267 of file Pool.h.

Referenced by MemPoolChunked::~MemPoolChunked(), ~MemPoolMalloc(), MemPoolChunked::allocate(), allocate(), clean(), MemPoolChunked::deallocate(), deallocate(), MemImplementingAllocator::flushMeters(), MemPoolChunked::getInUseCount(), getInUseCount(), MemImplementingAllocator::getMeter(), MemPoolChunked::getStats(), getStats(), and MemPoolChunked::idleTrigger().

next

MemImplementingAllocator* MemImplementingAllocator::next

inherited

Definition at line 270 of file Pool.h.

Referenced by MemImplementingAllocator::MemImplementingAllocator(), MemImplementingAllocator::~MemImplementingAllocator(), and memPoolIterateNext().

obj_size

size_t MemImplementingAllocator::obj_size

inherited

Definition at line 275 of file Pool.h.

Referenced by MemChunk::MemChunk(), allocate(), deallocate(), MemImplementingAllocator::flushMetersFull(), MemImplementingAllocator::freeOne(), MemPoolChunked::get(), MemPoolChunked::getStats(), getStats(), MemImplementingAllocator::objectSize(), MemPoolChunked::push(), and MemPoolChunked::setChunkSize().

saved_calls

size_t MemImplementingAllocator::saved_calls

inherited

Definition at line 274 of file Pool.h.

Referenced by allocate(), MemImplementingAllocator::flushMeters(), and MemPoolChunked::get().

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

• src/mem/PoolMalloc.h
• src/mem/PoolMalloc.cc