---

PsnSharedFreeStoreMemoryManager Class Reference

SHared memory manager who is aware of simulation steps SharedFreeStore memory managers have all their data localy allocated. More...

#include <PsnSharedFreeStoreMemoryManager.h>

Inheritance diagram for PsnSharedFreeStoreMemoryManager:

[legend]Collaboration diagram for PsnSharedFreeStoreMemoryManager:

[legend]List of all members.

Public Methods
	PsnSharedFreeStoreMemoryManager (size_t sizeDsm, size_t pageSize, size_t alignedSize, PsnRelaxedMemoryManager &memoryManager, int queueSize)
	Constructeur.
virtual	~PsnSharedFreeStoreMemoryManager ()
	Desctructeur.
virtual void *	mmalloc (size_t size)
	allocate so the that the memory allocated gets synced at the next simulation step
virtual void	mfree (void *ptr, size_t size)
	free memory allocated by the previous method
virtual void *	mallocAvecMemoire (size_t size, int frame)
	allocate dynamicaly, for visibility at frame frame
virtual size_t	getSize ()
	return the size of the sharedFreeStoreManager
Protected Attributes
PsnMemoryElementDescriptor **	_tabLibres
	the table of framed free mem lists */
size_t *	_tabTailleLibre
	the table containing the free memory available for each frame

---

Detailed Description

SHared memory manager who is aware of simulation steps SharedFreeStore memory managers have all their data localy allocated.

Acess to them doesn't need protection unless the process is multithreaded.

Author:

David Margery

Version:

1.0

Definition at line 31 of file PsnSharedFreeStoreMemoryManager.h.

---

Constructor & Destructor Documentation

PsnSharedFreeStoreMemoryManager::PsnSharedFreeStoreMemoryManager (  size_t    sizeDsm, size_t    pageSize, size_t    alignedSize, PsnRelaxedMemoryManager &    memoryManager, int    queueSize )

Constructeur. Definition at line 23 of file PsnSharedFreeStoreMemoryManager.cxx. References PsnFramedMemoryManager::_blockSize, PsnSharedMemoryManager::_pageSize, PsnFramedMemoryManager::_queueSize, PsnSharedMemoryManager::_startDsm, _tabLibres, _tabTailleLibre, PsnMemoryElementDescriptor::base, PsnMemoryElementDescriptor::next, and PsnMemoryElementDescriptor::size. : PsnFramedMemoryManager(sizeDsm, pageSize, alignedSize, memoryManager, queueSize) { //cerr<<"gestion des adresses entre "<<(void *)_startDsm<<" et "<<(void *)(_startDsm+_sizeDsm)<<endl; _tabLibres = new PsnMemoryElementDescriptor * [ _queueSize ] ; _tabTailleLibre = new size_t [ _queueSize ] ; int * toto ; for (int i = 0 ; i < _queueSize ; i++ ) { _tabLibres [ i ] = new PsnMemoryElementDescriptor() ; _tabLibres [ i ]->base = i * _blockSize ; _tabLibres [ i ]->size = _blockSize ; _tabLibres [ i ]->next = (unsigned int) NULL ; _tabTailleLibre [ i ] = _blockSize ; assert(_blockSize == _pageSize) ; //for rapid prototyping //write something on every page so that prefetch will work toto = (int *)(_startDsm + i * _pageSize) ; *toto = 0 ; } }

PsnSharedFreeStoreMemoryManager::~PsnSharedFreeStoreMemoryManager (    )  [virtual]

Desctructeur. Definition at line 48 of file PsnSharedFreeStoreMemoryManager.cxx. References PsnFramedMemoryManager::_blockSize, PsnFramedMemoryManager::_queueSize, _tabLibres, and _tabTailleLibre. { for (int i = 0 ; i < _queueSize ; i++ ) { assert (_tabTailleLibre [ i ] == _blockSize) ; delete _tabLibres [ i ] ; } delete [] _tabLibres ; delete [] _tabTailleLibre ; }

---

Member Function Documentation

size_t PsnSharedFreeStoreMemoryManager::getSize (    )  [virtual]

return the size of the sharedFreeStoreManager Definition at line 58 of file PsnSharedFreeStoreMemoryManager.cxx. References PsnSharedMemoryManager::_sizeDsm. { return _sizeDsm ; }

void * PsnSharedFreeStoreMemoryManager::mallocAvecMemoire (  size_t    size, int    frame )  [virtual]

allocate dynamicaly, for visibility at frame frame Definition at line 62 of file PsnSharedFreeStoreMemoryManager.cxx. References PsnFramedMemoryManager::_currentWritableIndex, and PsnSharedMemoryManager::allocateSizeRemembered(). Referenced by PsnRelaxedMemoryManager::allocateSizeRemembered(). { int oldCurrentWritableIndex = _currentWritableIndex ; _currentWritableIndex = frame ; void * resul=PsnFramedMemoryManager::allocateSizeRemembered(size); _currentWritableIndex = oldCurrentWritableIndex ; return resul; }

void PsnSharedFreeStoreMemoryManager::mfree (  void *    ptr, size_t    size )  [virtual]

free memory allocated by the previous method find out in which block this memory element is allocated add in the correct list change freeSize manage sync Reimplemented from PsnSharedMemoryManager. Definition at line 92 of file PsnSharedFreeStoreMemoryManager.cxx. References PsnFramedMemoryManager::_blockSize, PsnFramedMemoryManager::_queueSize, _tabLibres, _tabTailleLibre, PsnSecondarySharedMemoryManager::addInThisFree(), PsnSharedMemoryManager::alignedSize(), PsnSharedMemoryManager::inAdressSpace(), and PsnFramedMemoryManager::removeBlockFromSync(). { assert( inAdressSpace(ptr) ) ; size_t allocatedSize=alignedSize(size); //cerr<<"PsnSharedFreeStoreMemoryManager::mfree a "<<ptr<<" "<<allocatedSize<<endl; unsigned int offsetInMemory = globalAddressToLocal ( ptr ) ; unsigned int blockNumber = offsetInMemory / _blockSize ; //unsigned int offsetInBlock = offsetInMemory - blockNumber * _blockSize ; //assert ( offsetInBlock < _blockSize ) ; assert ( blockNumber < _queueSize ) ; addInThisFree( & _tabLibres [ blockNumber ] , offsetInMemory , allocatedSize ) ; _tabTailleLibre [ blockNumber ] -= allocatedSize ; if (_tabTailleLibre [ blockNumber ] == 0 ) { cerr<<"PsnSharedFreeStoreMemoryManager::mfree "<<blockNumber<<" removed from sync"<<endl; removeBlockFromSync ( blockNumber ) ; } }

void * PsnSharedFreeStoreMemoryManager::mmalloc (  size_t    size )  [virtual]

allocate so the that the memory allocated gets synced at the next simulation step Returns: NULL if allocaation is not possible, address of block of size bytes otherwise Reimplemented from PsnSharedMemoryManager. Definition at line 71 of file PsnSharedFreeStoreMemoryManager.cxx. References PsnFramedMemoryManager::_blockSize, PsnFramedMemoryManager::_currentWritableIndex, _tabLibres, _tabTailleLibre, PsnFramedMemoryManager::addBlockInSync(), PsnSharedMemoryManager::alignedSize(), and PsnSecondarySharedMemoryManager::getFromThisFree(). { void * resul ; size_t allocatedSize=alignedSize(size); //cerr<<"PsnSharedFreeStoreMemoryManager::mmalloc "<<allocatedSize<<" "<<_tabTailleLibre[ nextQueueIndex ]<<endl; if (allocatedSize <= _tabTailleLibre[ _currentWritableIndex ]) { resul = getFromThisFree( & (_tabLibres [ _currentWritableIndex ]) , allocatedSize) ; if ( resul != NULL ) { if ( _tabTailleLibre [ _currentWritableIndex ] == _blockSize ) { addBlockInSync( _currentWritableIndex ); } _tabTailleLibre [ _currentWritableIndex ] -= allocatedSize ; } } else { resul = NULL ; } //cerr<<"Block alloué à : "<<resul<<", debut de la memoire gérée : "<<(void *)_startDsm<<", page relative "<<_currentWritableIndex<<endl; return resul ; }

---

Member Data Documentation

PsnMemoryElementDescriptor* * PsnSharedFreeStoreMemoryManager::_tabLibres [protected]

the table of framed free mem lists */ Definition at line 63 of file PsnSharedFreeStoreMemoryManager.h. Referenced by mfree(), mmalloc(), PsnSharedFreeStoreMemoryManager(), and ~PsnSharedFreeStoreMemoryManager().

size_t* PsnSharedFreeStoreMemoryManager::_tabTailleLibre [protected]

the table containing the free memory available for each frame Definition at line 66 of file PsnSharedFreeStoreMemoryManager.h. Referenced by mfree(), mmalloc(), PsnSharedFreeStoreMemoryManager(), and ~PsnSharedFreeStoreMemoryManager().

---

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

• PsnSharedFreeStoreMemoryManager.h
• PsnSharedFreeStoreMemoryManager.cxx

---