summaryrefslogtreecommitdiff
path: root/indra/llcommon/llmemory.h
blob: e7488a03d77109066146fdd6cfeffdc25e691934 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
/**
 * @file llmemory.h
 * @brief Memory allocation/deallocation header-stuff goes here.
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */
#ifndef LLMEMORY_H
#define LLMEMORY_H

#include "linden_common.h"

class LLMutex ;

inline void* ll_aligned_malloc( size_t size, int align )
{
	void* mem = malloc( size + (align - 1) + sizeof(void*) );
	char* aligned = ((char*)mem) + sizeof(void*);
	aligned += align - ((uintptr_t)aligned & (align - 1));

	((void**)aligned)[-1] = mem;
	return aligned;
}

inline void ll_aligned_free( void* ptr )
{
	free( ((void**)ptr)[-1] );
}

#if !LL_USE_TCMALLOC
inline void* ll_aligned_malloc_16(size_t size) // returned hunk MUST be freed with ll_aligned_free_16().
{
#if defined(LL_WINDOWS)
	return _aligned_malloc(size, 16);
#elif defined(LL_DARWIN)
	return malloc(size); // default osx malloc is 16 byte aligned.
#else
	void *rtn;
	if (LL_LIKELY(0 == posix_memalign(&rtn, 16, size)))
		return rtn;
	else // bad alignment requested, or out of memory
		return NULL;
#endif
}

inline void ll_aligned_free_16(void *p)
{
#if defined(LL_WINDOWS)
	_aligned_free(p);
#elif defined(LL_DARWIN)
	return free(p);
#else
	free(p); // posix_memalign() is compatible with heap deallocator
#endif
}

inline void* ll_aligned_realloc_16(void* ptr, size_t size, size_t old_size) // returned hunk MUST be freed with ll_aligned_free_16().
{
#if defined(LL_WINDOWS)
	return _aligned_realloc(ptr, size, 16);
#elif defined(LL_DARWIN)
	return realloc(ptr,size); // default osx malloc is 16 byte aligned.
#else
	//FIXME: memcpy is SLOW
	void* ret = ll_aligned_malloc_16(size);
	if (ptr)
	{
		memcpy(ret, ptr, old_size);
		ll_aligned_free_16(ptr);
	}
	return ret;
#endif
}
#else // USE_TCMALLOC
// ll_aligned_foo_16 are not needed with tcmalloc
#define ll_aligned_malloc_16 malloc
#define ll_aligned_realloc_16 realloc
#define ll_aligned_free_16 free
#endif // USE_TCMALLOC

inline void* ll_aligned_malloc_32(size_t size) // returned hunk MUST be freed with ll_aligned_free_32().
{
#if defined(LL_WINDOWS)
	return _aligned_malloc(size, 32);
#elif defined(LL_DARWIN)
	return ll_aligned_malloc( size, 32 );
#else
	void *rtn;
	if (LL_LIKELY(0 == posix_memalign(&rtn, 32, size)))
		return rtn;
	else // bad alignment requested, or out of memory
		return NULL;
#endif
}

inline void ll_aligned_free_32(void *p)
{
#if defined(LL_WINDOWS)
	_aligned_free(p);
#elif defined(LL_DARWIN)
	ll_aligned_free( p );
#else
	free(p); // posix_memalign() is compatible with heap deallocator
#endif
}

#ifndef __DEBUG_PRIVATE_MEM__
#define __DEBUG_PRIVATE_MEM__  0
#endif

class LL_COMMON_API LLMemory
{
public:
	static void initClass();
	static void cleanupClass();
	static void freeReserve();
	// Return the resident set size of the current process, in bytes.
	// Return value is zero if not known.
	static U64 getCurrentRSS();
	static U32 getWorkingSetSize();
	static void* tryToAlloc(void* address, U32 size);
	static void initMaxHeapSizeGB(F32 max_heap_size_gb, BOOL prevent_heap_failure);
	static void updateMemoryInfo() ;
	static void logMemoryInfo(BOOL update = FALSE);
	static bool isMemoryPoolLow();

	static U32 getAvailableMemKB() ;
	static U32 getMaxMemKB() ;
	static U32 getAllocatedMemKB() ;
private:
	static char* reserveMem;
	static U32 sAvailPhysicalMemInKB ;
	static U32 sMaxPhysicalMemInKB ;
	static U32 sAllocatedMemInKB;
	static U32 sAllocatedPageSizeInKB ;

	static U32 sMaxHeapSizeInKB;
	static BOOL sEnableMemoryFailurePrevention;
};

//----------------------------------------------------------------------------
#if MEM_TRACK_MEM
class LLMutex ;
class LL_COMMON_API LLMemTracker
{
private:
	LLMemTracker() ;
	~LLMemTracker() ;

public:
	static void release() ;
	static LLMemTracker* getInstance() ;

	void track(const char* function, const int line) ;
	void preDraw(BOOL pause) ;
	void postDraw() ;
	const char* getNextLine() ;

private:
	static LLMemTracker* sInstance ;
	
	char**     mStringBuffer ;
	S32        mCapacity ;
	U32        mLastAllocatedMem ;
	S32        mCurIndex ;
	S32        mCounter;
	S32        mDrawnIndex;
	S32        mNumOfDrawn;
	BOOL       mPaused;
	LLMutex*   mMutexp ;
};

#define MEM_TRACK_RELEASE LLMemTracker::release() ;
#define MEM_TRACK         LLMemTracker::getInstance()->track(__FUNCTION__, __LINE__) ;

#else // MEM_TRACK_MEM

#define MEM_TRACK_RELEASE
#define MEM_TRACK

#endif // MEM_TRACK_MEM

//----------------------------------------------------------------------------


//
//class LLPrivateMemoryPool defines a private memory pool for an application to use, so the application does not
//need to access the heap directly fro each memory allocation. Throught this, the allocation speed is faster, 
//and reduces virtaul address space gragmentation problem.
//Note: this class is thread-safe by passing true to the constructor function. However, you do not need to do this unless
//you are sure the memory allocation and de-allocation will happen in different threads. To make the pool thread safe
//increases allocation and deallocation cost.
//
class LL_COMMON_API LLPrivateMemoryPool
{
	friend class LLPrivateMemoryPoolManager ;

public:
	class LL_COMMON_API LLMemoryBlock //each block is devided into slots uniformly
	{
	public: 
		LLMemoryBlock() ;
		~LLMemoryBlock() ;

		void init(char* buffer, U32 buffer_size, U32 slot_size) ;
		void setBuffer(char* buffer, U32 buffer_size) ;

		char* allocate() ;
		void  freeMem(void* addr) ;

		bool empty() {return !mAllocatedSlots;}
		bool isFull() {return mAllocatedSlots == mTotalSlots;}
		bool isFree() {return !mTotalSlots;}

		U32  getSlotSize()const {return mSlotSize;}
		U32  getTotalSlots()const {return mTotalSlots;}
		U32  getBufferSize()const {return mBufferSize;}
		char* getBuffer() const {return mBuffer;}

		//debug use
		void resetBitMap() ;
	private:
		char* mBuffer;
		U32   mSlotSize ; //when the block is not initialized, it is the buffer size.
		U32   mBufferSize ;
		U32   mUsageBits ;
		U8    mTotalSlots ;
		U8    mAllocatedSlots ;
		U8    mDummySize ; //size of extra bytes reserved for mUsageBits.

	public:
		LLMemoryBlock* mPrev ;
		LLMemoryBlock* mNext ;
		LLMemoryBlock* mSelf ;

		struct CompareAddress
		{
			bool operator()(const LLMemoryBlock* const& lhs, const LLMemoryBlock* const& rhs)
			{
				return (U32)lhs->getBuffer() < (U32)rhs->getBuffer();
			}
		};
	};

	class LL_COMMON_API LLMemoryChunk //is divided into memory blocks.
	{
	public:
		LLMemoryChunk() ;
		~LLMemoryChunk() ;

		void init(char* buffer, U32 buffer_size, U32 min_slot_size, U32 max_slot_size, U32 min_block_size, U32 max_block_size) ;
		void setBuffer(char* buffer, U32 buffer_size) ;

		bool empty() ;
		
		char* allocate(U32 size) ;
		void  freeMem(void* addr) ;

		char* getBuffer() const {return mBuffer;}
		U32 getBufferSize() const {return mBufferSize;}
		U32 getAllocatedSize() const {return mAlloatedSize;}

		bool containsAddress(const char* addr) const;

		static U32 getMaxOverhead(U32 data_buffer_size, U32 min_slot_size, 
													   U32 max_slot_size, U32 min_block_size, U32 max_block_size) ;
	
		void dump() ;

	private:
		U32 getPageIndex(U32 addr) ;
		U32 getBlockLevel(U32 size) ;
		U16 getPageLevel(U32 size) ;
		LLMemoryBlock* addBlock(U32 blk_idx) ;
		void popAvailBlockList(U32 blk_idx) ;
		void addToFreeSpace(LLMemoryBlock* blk) ;
		void removeFromFreeSpace(LLMemoryBlock* blk) ;
		void removeBlock(LLMemoryBlock* blk) ;
		void addToAvailBlockList(LLMemoryBlock* blk) ;
		U32  calcBlockSize(U32 slot_size);
		LLMemoryBlock* createNewBlock(LLMemoryBlock* blk, U32 buffer_size, U32 slot_size, U32 blk_idx) ;

	private:
		LLMemoryBlock** mAvailBlockList ;//256 by mMinSlotSize
		LLMemoryBlock** mFreeSpaceList;
		LLMemoryBlock*  mBlocks ; //index of blocks by address.
		
		char* mBuffer ;
		U32   mBufferSize ;
		char* mDataBuffer ;
		char* mMetaBuffer ;
		U32   mMinBlockSize ;
		U32   mMinSlotSize ;
		U32   mMaxSlotSize ;
		U32   mAlloatedSize ;
		U16   mBlockLevels;
		U16   mPartitionLevels;

	public:
		//form a linked list
		LLMemoryChunk* mNext ;
		LLMemoryChunk* mPrev ;
	} ;

private:
	LLPrivateMemoryPool(S32 type, U32 max_pool_size) ;
	~LLPrivateMemoryPool() ;

	char *allocate(U32 size) ;
	void  freeMem(void* addr) ;
	
	void  dump() ;
	U32   getTotalAllocatedSize() ;
	U32   getTotalReservedSize() {return mReservedPoolSize;}
	S32   getType() const {return mType; }
	bool  isEmpty() const {return !mNumOfChunks; }

private:
	void lock() ;
	void unlock() ;	
	S32 getChunkIndex(U32 size) ;
	LLMemoryChunk*  addChunk(S32 chunk_index) ;
	bool checkSize(U32 asked_size) ;
	void removeChunk(LLMemoryChunk* chunk) ;
	U16  findHashKey(const char* addr);
	void addToHashTable(LLMemoryChunk* chunk) ;
	void removeFromHashTable(LLMemoryChunk* chunk) ;
	void rehash() ;
	bool fillHashTable(U16 start, U16 end, LLMemoryChunk* chunk) ;
	LLMemoryChunk* findChunk(const char* addr) ;

	void destroyPool() ;

public:
	enum
	{
		SMALL_ALLOCATION = 0, //from 8 bytes to 2KB(exclusive), page size 2KB, max chunk size is 4MB.
		MEDIUM_ALLOCATION,    //from 2KB to 512KB(exclusive), page size 32KB, max chunk size 4MB
		LARGE_ALLOCATION,     //from 512KB to 4MB(inclusive), page size 64KB, max chunk size 16MB
		SUPER_ALLOCATION      //allocation larger than 4MB.
	};

	enum
	{
		STATIC = 0 ,       //static pool(each alllocation stays for a long time) without threading support
		VOLATILE,          //Volatile pool(each allocation stays for a very short time) without threading support
		STATIC_THREADED,   //static pool with threading support
		VOLATILE_THREADED, //volatile pool with threading support
		MAX_TYPES
	}; //pool types

private:
	LLMutex* mMutexp ;
	U32  mMaxPoolSize;
	U32  mReservedPoolSize ;	

	LLMemoryChunk* mChunkList[SUPER_ALLOCATION] ; //all memory chunks reserved by this pool, sorted by address	
	U16 mNumOfChunks ;
	U16 mHashFactor ;

	S32 mType ;

	class LLChunkHashElement
	{
	public:
		LLChunkHashElement() {mFirst = NULL ; mSecond = NULL ;}

		bool add(LLMemoryChunk* chunk) ;
		void remove(LLMemoryChunk* chunk) ;
		LLMemoryChunk* findChunk(const char* addr) ;

		bool empty() {return !mFirst && !mSecond; }
		bool full()  {return mFirst && mSecond; }
		bool hasElement(LLMemoryChunk* chunk) {return mFirst == chunk || mSecond == chunk;}

	private:
		LLMemoryChunk* mFirst ;
		LLMemoryChunk* mSecond ;
	};
	std::vector<LLChunkHashElement> mChunkHashList ;
};

class LL_COMMON_API LLPrivateMemoryPoolManager
{
private:
	LLPrivateMemoryPoolManager(BOOL enabled, U32 max_pool_size) ;
	~LLPrivateMemoryPoolManager() ;

public:	
	static LLPrivateMemoryPoolManager* getInstance() ;
	static void initClass(BOOL enabled, U32 pool_size) ;
	static void destroyClass() ;

	LLPrivateMemoryPool* newPool(S32 type) ;
	void deletePool(LLPrivateMemoryPool* pool) ;

private:	
	std::vector<LLPrivateMemoryPool*> mPoolList ;	
	U32  mMaxPrivatePoolSize;

	static LLPrivateMemoryPoolManager* sInstance ;
	static BOOL sPrivatePoolEnabled;
	static std::vector<LLPrivateMemoryPool*> sDanglingPoolList ;
public:
	//debug and statistics info.
	void updateStatistics() ;

	U32 mTotalReservedSize ;
	U32 mTotalAllocatedSize ;

public:
#if __DEBUG_PRIVATE_MEM__
	static char* allocate(LLPrivateMemoryPool* poolp, U32 size, const char* function, const int line) ;	
	
	typedef std::map<char*, std::string> mem_allocation_info_t ;
	static mem_allocation_info_t sMemAllocationTracker;
#else
	static char* allocate(LLPrivateMemoryPool* poolp, U32 size) ;	
#endif
	static void  freeMem(LLPrivateMemoryPool* poolp, void* addr) ;
};

//-------------------------------------------------------------------------------------
#if __DEBUG_PRIVATE_MEM__
#define ALLOCATE_MEM(poolp, size) LLPrivateMemoryPoolManager::allocate((poolp), (size), __FUNCTION__, __LINE__)
#else
#define ALLOCATE_MEM(poolp, size) LLPrivateMemoryPoolManager::allocate((poolp), (size))
#endif
#define FREE_MEM(poolp, addr) LLPrivateMemoryPoolManager::freeMem((poolp), (addr))
//-------------------------------------------------------------------------------------

//
//the below singleton is used to test the private memory pool.
//
#if 0
class LL_COMMON_API LLPrivateMemoryPoolTester
{
private:
	LLPrivateMemoryPoolTester() ;
	~LLPrivateMemoryPoolTester() ;

public:
	static LLPrivateMemoryPoolTester* getInstance() ;
	static void destroy() ;

	void run(S32 type) ;	

private:
	void correctnessTest() ;
	void performanceTest() ;
	void fragmentationtest() ;

	void test(U32 min_size, U32 max_size, U32 stride, U32 times, bool random_deletion, bool output_statistics) ;
	void testAndTime(U32 size, U32 times) ;

#if 0
public:
	void* operator new(size_t size)
	{
		return (void*)sPool->allocate(size) ;
	}
    void  operator delete(void* addr)
	{
		sPool->freeMem(addr) ;
	}
	void* operator new[](size_t size)
	{
		return (void*)sPool->allocate(size) ;
	}
    void  operator delete[](void* addr)
	{
		sPool->freeMem(addr) ;
	}
#endif

private:
	static LLPrivateMemoryPoolTester* sInstance;
	static LLPrivateMemoryPool* sPool ;
	static LLPrivateMemoryPool* sThreadedPool ;
};
#if 0
//static
void* LLPrivateMemoryPoolTester::operator new(size_t size)
{
	return (void*)sPool->allocate(size) ;
}

//static
void  LLPrivateMemoryPoolTester::operator delete(void* addr)
{
	sPool->free(addr) ;
}

//static
void* LLPrivateMemoryPoolTester::operator new[](size_t size)
{
	return (void*)sPool->allocate(size) ;
}

//static
void  LLPrivateMemoryPoolTester::operator delete[](void* addr)
{
	sPool->free(addr) ;
}
#endif
#endif
// LLRefCount moved to llrefcount.h

// LLPointer moved to llpointer.h

// LLSafeHandle moved to llsafehandle.h

// LLSingleton moved to llsingleton.h

LL_COMMON_API void ll_assert_aligned_func(uintptr_t ptr,U32 alignment);

#ifdef SHOW_ASSERT
#define ll_assert_aligned(ptr,alignment) ll_assert_aligned_func(reinterpret_cast<uintptr_t>(ptr),((U32)alignment))
#else
#define ll_assert_aligned(ptr,alignment)
#endif


#endif