7 files changed, 202 insertions, 204 deletions

diff --git a/indra/llcommon/llfasttimer.cpp b/indra/llcommon/llfasttimer.cpp
index 52b3bb39b2..32ef01b2b6 100755
--- a/indra/llcommon/llfasttimer.cpp
+++ b/indra/llcommon/llfasttimer.cpp
@@ -259,15 +259,12 @@ void TimeBlock::updateTimes()
 		&& cur_timer->mParentTimerData.mActiveTimer != cur_timer) // root defined by parent pointing to self
 	{
 		U64 cumulative_time_delta = cur_time - cur_timer->mStartTime;
-		accumulator->mTotalTimeCounter += cumulative_time_delta 
-			- (accumulator->mTotalTimeCounter 
-			- cur_timer->mBlockStartTotalTimeCounter);
+		cur_timer->mStartTime = cur_time;
+
+		accumulator->mTotalTimeCounter += cumulative_time_delta;
 		accumulator->mSelfTimeCounter += cumulative_time_delta - stack_record->mChildTime;
 		stack_record->mChildTime = 0;
 
-		cur_timer->mStartTime = cur_time;
-		cur_timer->mBlockStartTotalTimeCounter = accumulator->mTotalTimeCounter;
-
 		stack_record = &cur_timer->mParentTimerData;
 		accumulator  = &stack_record->mTimeBlock->getCurrentAccumulator();
 		cur_timer    = stack_record->mActiveTimer;
@@ -423,7 +420,6 @@ void TimeBlock::writeLog(std::ostream& os)
 TimeBlockAccumulator::TimeBlockAccumulator() 
 :	mTotalTimeCounter(0),
 	mSelfTimeCounter(0),
-	mStartTotalTimeCounter(0),
 	mCalls(0),
 	mLastCaller(NULL),
 	mActiveCount(0),
@@ -436,7 +432,7 @@ void TimeBlockAccumulator::addSamples( const TimeBlockAccumulator& other, EBuffe
 	// we can't merge two unrelated time block samples, as that will screw with the nested timings
 	// due to the call hierarchy of each thread
 	llassert(append_type == SEQUENTIAL);
-	mTotalTimeCounter += other.mTotalTimeCounter - other.mStartTotalTimeCounter;
+	mTotalTimeCounter += other.mTotalTimeCounter;
 	mSelfTimeCounter += other.mSelfTimeCounter;
 	mCalls += other.mCalls;
 	mLastCaller = other.mLastCaller;
@@ -449,21 +445,15 @@ void TimeBlockAccumulator::reset( const TimeBlockAccumulator* other )
 {
 	mCalls = 0;
 	mSelfTimeCounter = 0;
+	mTotalTimeCounter = 0;
 
 	if (other)
 	{
-		mStartTotalTimeCounter = other->mTotalTimeCounter;
-		mTotalTimeCounter = mStartTotalTimeCounter;
-
 		mLastCaller = other->mLastCaller;
 		mActiveCount = other->mActiveCount;
 		mMoveUpTree = other->mMoveUpTree;
 		mParent = other->mParent;
 	}
-	else
-	{
-		mStartTotalTimeCounter = mTotalTimeCounter;
-	}
 }
 
 F64Seconds BlockTimer::getElapsedTime()
diff --git a/indra/llcommon/llfasttimer.h b/indra/llcommon/llfasttimer.h
index 53c61734e5..4eb12907dc 100755
--- a/indra/llcommon/llfasttimer.h
+++ b/indra/llcommon/llfasttimer.h
@@ -71,7 +71,6 @@ public:
 
 private:
 	U64						mStartTime;
-	U64						mBlockStartTotalTimeCounter;
 	BlockTimerStackRecord	mParentTimerData;
 };
 
@@ -287,7 +286,6 @@ LL_FORCE_INLINE BlockTimer::BlockTimer(TimeBlock& timer)
 	if (!cur_timer_data) return;
 	TimeBlockAccumulator& accumulator = timer.getCurrentAccumulator();
 	accumulator.mActiveCount++;
-	mBlockStartTotalTimeCounter = accumulator.mTotalTimeCounter;
 	// keep current parent as long as it is active when we are
 	accumulator.mMoveUpTree |= (accumulator.mParent->getCurrentAccumulator().mActiveCount == 0);
 
@@ -312,7 +310,7 @@ LL_FORCE_INLINE BlockTimer::~BlockTimer()
 	TimeBlockAccumulator& accumulator = cur_timer_data->mTimeBlock->getCurrentAccumulator();
 
 	accumulator.mCalls++;
-	accumulator.mTotalTimeCounter += total_time - (accumulator.mTotalTimeCounter - mBlockStartTotalTimeCounter);
+	accumulator.mTotalTimeCounter += total_time;
 	accumulator.mSelfTimeCounter += total_time - cur_timer_data->mChildTime;
 	accumulator.mActiveCount--;
 
diff --git a/indra/llcommon/llmemory.h b/indra/llcommon/llmemory.h
index d3c5e5235d..2330bfb8ea 100755
--- a/indra/llcommon/llmemory.h
+++ b/indra/llcommon/llmemory.h
@@ -54,7 +54,7 @@ class LLMutex ;
 #define LL_DEFAULT_HEAP_ALIGN 8
 #endif
 
-inline void* ll_aligned_malloc( size_t size, int align )
+inline void* ll_aligned_malloc_fallback( size_t size, int align )
 {
 	void* mem = malloc( size + (align - 1) + sizeof(void*) );
 	char* aligned = ((char*)mem) + sizeof(void*);
@@ -64,7 +64,7 @@ inline void* ll_aligned_malloc( size_t size, int align )
 	return aligned;
 }
 
-inline void ll_aligned_free( void* ptr )
+inline void ll_aligned_free_fallback( void* ptr )
 {
 	free( ((void**)ptr)[-1] );
 }
@@ -130,7 +130,7 @@ inline void* ll_aligned_malloc_32(size_t size) // returned hunk MUST be freed wi
 #if defined(LL_WINDOWS)
 	return _aligned_malloc(size, 32);
 #elif defined(LL_DARWIN)
-	return ll_aligned_malloc( size, 32 );
+	return ll_aligned_malloc_fallback( size, 32 );
 #else
 	void *rtn;
 	if (LL_LIKELY(0 == posix_memalign(&rtn, 32, size)))
@@ -151,6 +151,49 @@ inline void ll_aligned_free_32(void *p)
 #endif
 }
 
+// general purpose dispatch functions that are forced inline so they can compile down to a single call
+LL_FORCE_INLINE void* ll_aligned_malloc(size_t alignment, size_t size)
+{
+	if (LL_DEFAULT_HEAP_ALIGN % alignment == 0)
+	{
+		return malloc(size);
+	}
+	else if (alignment == 16)
+	{
+		return ll_aligned_malloc_16(size);
+	}
+	else if (alignment == 32)
+	{
+		return ll_aligned_malloc_32(size);
+	}
+	else
+	{
+		return ll_aligned_malloc_fallback(size, alignment);
+	}
+}
+
+LL_FORCE_INLINE void ll_aligned_free(size_t alignment, void* ptr)
+{
+	if (alignment == LL_DEFAULT_HEAP_ALIGN)
+	{
+		free(ptr);
+	}
+	else if (alignment == 16)
+	{
+		ll_aligned_free_16(ptr);
+	}
+	else if (alignment == 32)
+	{
+		return ll_aligned_free_32(ptr);
+	}
+	else
+	{
+		return ll_aligned_free_fallback(ptr);
+	}
+}
+
+
+
 #ifndef __DEBUG_PRIVATE_MEM__
 #define __DEBUG_PRIVATE_MEM__  0
 #endif
diff --git a/indra/llcommon/lltrace.h b/indra/llcommon/lltrace.h
index 5c833ea287..355617a898 100644
--- a/indra/llcommon/lltrace.h
+++ b/indra/llcommon/lltrace.h
@@ -161,21 +161,6 @@ void sample(SampleStatHandle<T>& measurement, VALUE_T value)
 	measurement.getCurrentAccumulator().sample(storage_value(converted_value));
 }
 
-template<typename T, typename VALUE_T>
-void add(SampleStatHandle<T>& measurement, VALUE_T value)
-{
-	T converted_value(value);
-	SampleAccumulator& acc = measurement.getCurrentAccumulator();
-	if (acc.hasValue())
-	{
-		acc.sample(acc.getLastValue() + converted_value);
-	}
-	else
-	{
-		acc.sample(converted_value);
-	}
-}
-
 template <typename T = F64>
 class CountStatHandle
 :	public TraceType<CountAccumulator>
@@ -296,28 +281,28 @@ public:
 	}
 };
 
-inline void claim_mem(MemStatHandle& measurement, size_t size)
+inline void claim_footprint(MemStatHandle& measurement, S32 size)
 {
 	MemStatAccumulator& accumulator = measurement.getCurrentAccumulator();
 	accumulator.mSize.sample(accumulator.mSize.hasValue() ? accumulator.mSize.getLastValue() + (F64)size : (F64)size);
 	accumulator.mAllocated.add(1);
 }
 
-inline void disclaim_mem(MemStatHandle& measurement, size_t size)
+inline void disclaim_footprint(MemStatHandle& measurement, S32 size)
 {
 	MemStatAccumulator& accumulator = measurement.getCurrentAccumulator();
 	accumulator.mSize.sample(accumulator.mSize.hasValue() ? accumulator.mSize.getLastValue() - (F64)size : -(F64)size);
 	accumulator.mDeallocated.add(1);
 }
 
-inline void claim_shadow_mem(MemStatHandle& measurement, size_t size)
+inline void claim_shadow(MemStatHandle& measurement, S32 size)
 {
 	MemStatAccumulator& accumulator = measurement.getCurrentAccumulator();
 	accumulator.mShadowSize.sample(accumulator.mSize.hasValue() ? accumulator.mSize.getLastValue() + (F64)size : (F64)size);
 	accumulator.mShadowAllocated.add(1);
 }
 
-inline void disclaim_shadow_mem(MemStatHandle& measurement, size_t size)
+inline void disclaim_shadow(MemStatHandle& measurement, S32 size)
 {
 	MemStatAccumulator& accumulator = measurement.getCurrentAccumulator();
 	accumulator.mShadowSize.sample(accumulator.mSize.hasValue() ? accumulator.mSize.getLastValue() - (F64)size : -(F64)size);
@@ -327,94 +312,122 @@ inline void disclaim_shadow_mem(MemStatHandle& measurement, size_t size)
 // measures effective memory footprint of specified type
 // specialize to cover different types
 
-template<typename T>
-struct MemFootprint
+template<typename T, typename IS_MEM_TRACKABLE = void>
+struct MeasureMem
 {
-	static size_t measure(const T& value)
+	static size_t measureFootprint(const T& value)
 	{
 		return sizeof(T);
 	}
 
-	static size_t measure()
+	static size_t measureFootprint()
 	{
 		return sizeof(T);
 	}
+
+	static size_t measureShadow(const T& value)
+	{
+		return 0;
+	}
+
+	static size_t measureShadow()
+	{
+		return 0;
+	}
 };
 
 template<typename T>
-struct MemFootprint<T*>
+struct MeasureMem<T, typename T::mem_trackable_tag_t>
 {
-	static size_t measure(const T* value)
+	static size_t measureFootprint(const T& value)
+	{
+		return sizeof(T) + value.getMemFootprint();
+	}
+
+	static size_t measureFootprint()
+	{
+		return sizeof(T);
+	}
+
+	static size_t measureShadow(const T& value)
+	{
+		return value.getMemShadow();
+	}
+
+	static size_t measureShadow()
+	{
+		return MeasureMem<T>::measureShadow();
+	}
+};
+
+
+template<typename T, typename IS_MEM_TRACKABLE>
+struct MeasureMem<T*, IS_MEM_TRACKABLE>
+{
+	static size_t measureFootprint(const T* value)
 	{
 		if (!value)
 		{
 			return 0;
 		}
-		return MemFootprint<T>::measure(*value);
+		return MeasureMem<T>::measureFootprint(*value);
 	}
 
-	static size_t measure()
+	static size_t measureFootprint()
 	{
-		return MemFootprint<T>::measure();
+		return MeasureMem<T>::measureFootprint();
 	}
-};
 
-template<typename T>
-struct MemFootprint<std::basic_string<T> >
-{
-	static size_t measure(const std::basic_string<T>& value)
+	static size_t measureShadow(const T* value)
 	{
-		return value.capacity() * sizeof(T);
+		return MeasureMem<T>::measureShadow(*value);
 	}
 
-	static size_t measure()
+	static size_t measureShadow()
 	{
-		return sizeof(std::basic_string<T>);
+		return MeasureMem<T>::measureShadow();
 	}
 };
 
-template<typename T>
-struct MemFootprint<std::vector<T> >
+template<typename T, typename IS_MEM_TRACKABLE>
+struct MeasureMem<std::basic_string<T>, IS_MEM_TRACKABLE>
 {
-	static size_t measure(const std::vector<T>& value)
+	static size_t measureFootprint(const std::basic_string<T>& value)
 	{
-		return value.capacity() * MemFootprint<T>::measure();
+		return value.capacity() * sizeof(T);
 	}
 
-	static size_t measure()
+	static size_t measureFootprint()
 	{
-		return sizeof(std::vector<T>);
+		return sizeof(std::basic_string<T>);
 	}
-};
 
-template<typename T>
-struct MemFootprint<std::list<T> >
-{
-	static size_t measure(const std::list<T>& value)
+	static size_t measureShadow(const std::basic_string<T>& value)
 	{
-		return value.size() * (MemFootprint<T>::measure() + sizeof(void*) * 2);
+		return 0;
 	}
 
-	static size_t measure()
+	static size_t measureShadow()
 	{
-		return sizeof(std::list<T>);
+		return 0;
 	}
 };
 
 template<typename DERIVED, size_t ALIGNMENT = LL_DEFAULT_HEAP_ALIGN>
 class MemTrackable
 {
-	template<typename TRACKED, typename TRACKED_IS_TRACKER>
-	struct TrackMemImpl;
-
-	typedef MemTrackable<DERIVED, ALIGNMENT> mem_trackable_t;
-	static	MemStatHandle	sMemStat;
-
 public:
 	typedef void mem_trackable_tag_t;
 
+	enum EMemType
+	{
+		MEM_FOOTPRINT, 
+		MEM_SHADOW
+	};
+
 	MemTrackable()
-	:	mMemFootprint(0)
+	:	mMemFootprint(0),
+		mMemShadow(0)
 	{
 		static bool name_initialized = false;
 		if (!name_initialized)
@@ -426,7 +439,8 @@ public:
 
 	virtual ~MemTrackable()
 	{
-		memDisclaim(mMemFootprint);
+		disclaimMem(mMemFootprint, MEM_FOOTPRINT);
+		disclaimMem(mMemShadow, MEM_SHADOW);
 	}
 
 	static MemStatHandle& getMemStatHandle()
@@ -434,186 +448,129 @@ public:
 		return sMemStat;
 	}
 
+	S32 getMemFootprint() const	{ return mMemFootprint; }
+	S32 getMemShadow() const	{ return mMemShadow; }
+
 	void* operator new(size_t size) 
 	{
-		claim_mem(sMemStat, size);
-
-		if (ALIGNMENT == LL_DEFAULT_HEAP_ALIGN)
-		{
-			return ::operator new(size);
-		}
-		else if (ALIGNMENT == 16)
-		{
-			return ll_aligned_malloc_16(size);
-		}
-		else if (ALIGNMENT == 32)
-		{
-			return ll_aligned_malloc_32(size);
-		}
-		else
-		{
-			return ll_aligned_malloc(size, ALIGNMENT);
-		}
+		claim_footprint(sMemStat, size);
+		return ll_aligned_malloc(ALIGNMENT, size);
 	}
 
 	void operator delete(void* ptr, size_t size)
 	{
-		disclaim_mem(sMemStat, size);
-
-		if (ALIGNMENT == LL_DEFAULT_HEAP_ALIGN)
-		{
-			::operator delete(ptr);
-		}
-		else if (ALIGNMENT == 16)
-		{
-			ll_aligned_free_16(ptr);
-		}
-		else if (ALIGNMENT == 32)
-		{
-			return ll_aligned_free_32(ptr);
-		}
-		else
-		{
-			return ll_aligned_free(ptr);
-		}
+		disclaim_footprint(sMemStat, size);
+		ll_aligned_free(ALIGNMENT, ptr);
 	}
 
 	void *operator new [](size_t size)
 	{
-		claim_mem(sMemStat, size);
-
-		if (ALIGNMENT == LL_DEFAULT_HEAP_ALIGN)
-		{
-			return ::operator new[](size);
-		}
-		else if (ALIGNMENT == 16)
-		{
-			return ll_aligned_malloc_16(size);
-		}
-		else if (ALIGNMENT == 32)
-		{
-			return ll_aligned_malloc_32(size);
-		}
-		else
-		{
-			return ll_aligned_malloc(size, ALIGNMENT);
-		}
+		claim_footprint(sMemStat, size);
+		return ll_aligned_malloc(ALIGNMENT, size);
 	}
 
 	void operator delete[](void* ptr, size_t size)
 	{
-		disclaim_mem(sMemStat, size);
-
-		if (ALIGNMENT == LL_DEFAULT_HEAP_ALIGN)
-		{
-			::operator delete[](ptr);
-		}
-		else if (ALIGNMENT == 16)
-		{
-			ll_aligned_free_16(ptr);
-		}
-		else if (ALIGNMENT == 32)
-		{
-			return ll_aligned_free_32(ptr);
-		}
-		else
-		{
-			return ll_aligned_free(ptr);
-		}
+		disclaim_footprint(sMemStat, size);
+		ll_aligned_free(ALIGNMENT, ptr);
 	}
 
 	// claim memory associated with other objects/data as our own, adding to our calculated footprint
 	template<typename CLAIM_T>
-	CLAIM_T& memClaim(CLAIM_T& value)
+	CLAIM_T& claimMem(CLAIM_T& value, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		TrackMemImpl<CLAIM_T>::claim(*this, value);
+		trackAlloc(MeasureMem<CLAIM_T>::measureFootprint(value), mem_type);
+		trackAlloc(MeasureMem<CLAIM_T>::measureShadow(value), MEM_SHADOW);
 		return value;
 	}
 
 	template<typename CLAIM_T>
-	const CLAIM_T& memClaim(const CLAIM_T& value)
+	const CLAIM_T& claimMem(const CLAIM_T& value, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		TrackMemImpl<CLAIM_T>::claim(*this, value);
+		trackAlloc(MeasureMem<CLAIM_T>::measureFootprint(value), mem_type);
+		trackAlloc(MeasureMem<CLAIM_T>::measureShadow(value), MEM_SHADOW);
 		return value;
 	}
 
-	size_t& memClaim(size_t& size)
+	size_t& claimMem(size_t& size, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		claim_mem(sMemStat, size);
-		mMemFootprint += size;
+		trackAlloc(size, mem_type);
 		return size;
 	}
 
-	int& memClaim(int& size)
+	S32& claimMem(S32& size, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		claim_mem(sMemStat, size);
-		mMemFootprint += size;
+		trackAlloc(size, mem_type);
 		return size;
 	}
 
 	// remove memory we had claimed from our calculated footprint
 	template<typename CLAIM_T>
-	CLAIM_T& memDisclaim(CLAIM_T& value)
+	CLAIM_T& disclaimMem(CLAIM_T& value, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		TrackMemImpl<CLAIM_T>::disclaim(*this, value);
+		trackDealloc(MeasureMem<CLAIM_T>::measureFootprint(value), mem_type);
+		trackDealloc(MeasureMem<CLAIM_T>::measureShadow(value), MEM_SHADOW);
 		return value;
 	}
 
 	template<typename CLAIM_T>
-	const CLAIM_T& memDisclaim(const CLAIM_T& value)
+	const CLAIM_T& disclaimMem(const CLAIM_T& value, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		TrackMemImpl<CLAIM_T>::disclaim(*this, value);
+		trackDealloc(MeasureMem<CLAIM_T>::measureFootprint(value), mem_type);
+		trackDealloc(MeasureMem<CLAIM_T>::measureShadow(value), MEM_SHADOW);
 		return value;
 	}
 
-	size_t& memDisclaim(size_t& size)
+	size_t& disclaimMem(size_t& size, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		disclaim_mem(sMemStat, size);
-		mMemFootprint -= size;
+		trackDealloc(size, mem_type);
 		return size;
 	}
 
-	int& memDisclaim(int& size)
+	S32& disclaimMem(S32& size, EMemType mem_type = MEM_FOOTPRINT)
 	{
-		disclaim_mem(sMemStat, size);
-		mMemFootprint -= size;
+		trackDealloc(size, mem_type);
 		return size;
 	}
 
 private:
-	size_t mMemFootprint;
 
-	template<typename TRACKED, typename TRACKED_IS_TRACKER = void>
-	struct TrackMemImpl
+	void trackAlloc(S32 size, EMemType mem_type)
 	{
-		static void claim(mem_trackable_t& tracker, const TRACKED& tracked)
+		if (mem_type == MEM_FOOTPRINT)
 		{
-			size_t footprint = MemFootprint<TRACKED>::measure(tracked);
-			claim_mem(sMemStat, footprint);
-			tracker.mMemFootprint += footprint;
+			claim_footprint(sMemStat, size);
+			mMemFootprint += size;
 		}
-
-		static void disclaim(mem_trackable_t& tracker, const TRACKED& tracked)
+		else
 		{
-			size_t footprint = MemFootprint<TRACKED>::measure(tracked);
-			disclaim_mem(sMemStat, footprint);
-			tracker.mMemFootprint -= footprint;
+			claim_shadow(sMemStat, size);
+			mMemShadow += size;
 		}
-	};
+	}
 
-	template<typename TRACKED>
-	struct TrackMemImpl<TRACKED, typename TRACKED::mem_trackable_tag_t>
+	void trackDealloc(S32 size, EMemType mem_type)
 	{
-		static void claim(mem_trackable_t& tracker, TRACKED& tracked)
+		if (mem_type == MEM_FOOTPRINT)
 		{
-			claim_shadow_mem( sMemStat, MemFootprint<TRACKED>::measure(tracked));
+			disclaim_footprint(sMemStat, size);
+			mMemFootprint -= size;
 		}
-
-		static void disclaim(mem_trackable_t& tracker, TRACKED& tracked)
+		else
 		{
-			disclaim_shadow_mem(sMemStat, MemFootprint<TRACKED>::measure(tracked));
+			disclaim_shadow(sMemStat, size);
+			mMemShadow -= size;
 		}
-	};
+	}
+
+private:
+	// use signed values so that we can temporarily go negative
+	// and reconcile in destructor
+	// NB: this assumes that no single class is responsible for > 2GB of allocations
+	S32 mMemFootprint,
+		mMemShadow;
+	
+	static	MemStatHandle	sMemStat;
 };
 
 template<typename DERIVED, size_t ALIGNMENT>
diff --git a/indra/llcommon/lltraceaccumulators.h b/indra/llcommon/lltraceaccumulators.h
index 37a35f4e23..4fe84455a6 100644
--- a/indra/llcommon/lltraceaccumulators.h
+++ b/indra/llcommon/lltraceaccumulators.h
@@ -35,6 +35,7 @@
 #include "lltimer.h"
 #include "llrefcount.h"
 #include "llthreadlocalstorage.h"
+#include "llmemory.h"
 #include <limits>
 
 namespace LLTrace
@@ -51,7 +52,7 @@ namespace LLTrace
 	class AccumulatorBuffer : public LLRefCount
 	{
 		typedef AccumulatorBuffer<ACCUMULATOR> self_t;
-		static const U32 DEFAULT_ACCUMULATOR_BUFFER_SIZE = 64;
+		static const U32 ACCUMULATOR_BUFFER_SIZE_INCREMENT = 16;
 	private:
 		struct StaticAllocationMarker { };
 
@@ -149,7 +150,9 @@ namespace LLTrace
 			size_t next_slot = sNextStorageSlot++;
 			if (next_slot >= mStorageSize)
 			{
-				resize(mStorageSize + (mStorageSize >> 2));
+				// don't perform doubling, as this should only happen during startup
+				// want to keep a tight bounds as we will have a lot of these buffers
+				resize(mStorageSize + ACCUMULATOR_BUFFER_SIZE_INCREMENT);
 			}
 			llassert(mStorage && next_slot < mStorageSize);
 			return next_slot;
@@ -199,7 +202,7 @@ namespace LLTrace
 				// so as not to trigger an access violation
 				sDefaultBuffer = new AccumulatorBuffer(StaticAllocationMarker());
 				sInitialized = true;
-				sDefaultBuffer->resize(DEFAULT_ACCUMULATOR_BUFFER_SIZE);
+				sDefaultBuffer->resize(ACCUMULATOR_BUFFER_SIZE_INCREMENT);
 			}
 			return sDefaultBuffer;
 		}
@@ -427,6 +430,17 @@ namespace LLTrace
 			typedef F64Seconds value_t;
 		};
 
+		// arrays are allocated with 32 byte alignment
+		void *operator new [](size_t size)
+		{
+			return ll_aligned_malloc(32, size);
+		}
+
+		void operator delete[](void* ptr, size_t size)
+		{
+			ll_aligned_free(32, ptr);
+		}
+
 		TimeBlockAccumulator();
 		void addSamples(const self_t& other, EBufferAppendType append_type);
 		void reset(const self_t* other);
@@ -435,8 +449,7 @@ namespace LLTrace
 		//
 		// members
 		//
-		U64					mStartTotalTimeCounter,
-							mTotalTimeCounter,
+		U64					mTotalTimeCounter,
 							mSelfTimeCounter;
 		U32					mCalls;
 		class TimeBlock*	mParent;		// last acknowledged parent of this time block
diff --git a/indra/llcommon/lltracerecording.cpp b/indra/llcommon/lltracerecording.cpp
index c606007d89..c16d02216d 100644
--- a/indra/llcommon/lltracerecording.cpp
+++ b/indra/llcommon/lltracerecording.cpp
@@ -131,7 +131,7 @@ void Recording::appendRecording( Recording& other )
 F64Seconds Recording::getSum(const TraceType<TimeBlockAccumulator>& stat)
 {
 	const TimeBlockAccumulator& accumulator = mBuffers->mStackTimers[stat.getIndex()];
-	return F64Seconds((F64)(accumulator.mTotalTimeCounter - accumulator.mStartTotalTimeCounter) 
+	return F64Seconds((F64)(accumulator.mTotalTimeCounter) 
 				/ (F64)LLTrace::TimeBlock::countsPerSecond());
 }
 
@@ -151,7 +151,7 @@ F64Seconds Recording::getPerSec(const TraceType<TimeBlockAccumulator>& stat)
 {
 	const TimeBlockAccumulator& accumulator = mBuffers->mStackTimers[stat.getIndex()];
 
-	return F64Seconds((F64)(accumulator.mTotalTimeCounter - accumulator.mStartTotalTimeCounter) 
+	return F64Seconds((F64)(accumulator.mTotalTimeCounter) 
 				/ ((F64)LLTrace::TimeBlock::countsPerSecond() * mElapsedSeconds.value()));
 }
 
@@ -935,7 +935,7 @@ void ExtendablePeriodicRecording::handleSplitTo(ExtendablePeriodicRecording& oth
 
 PeriodicRecording& get_frame_recording()
 {
-	static LLThreadLocalPointer<PeriodicRecording> sRecording(new PeriodicRecording(1000, PeriodicRecording::STARTED));
+	static LLThreadLocalPointer<PeriodicRecording> sRecording(new PeriodicRecording(200, PeriodicRecording::STARTED));
 	return *sRecording;
 }
 
diff --git a/indra/llcommon/lltracethreadrecorder.cpp b/indra/llcommon/lltracethreadrecorder.cpp
index d3d9eb5ca7..e131af5f16 100644
--- a/indra/llcommon/lltracethreadrecorder.cpp
+++ b/indra/llcommon/lltracethreadrecorder.cpp
@@ -127,10 +127,7 @@ void ThreadRecorder::activate( AccumulatorBufferGroup* recording, bool from_hand
 	{
 		AccumulatorBufferGroup& prev_active_recording = mActiveRecordings.back()->mPartialRecording;
 		prev_active_recording.sync();
-		if (!from_handoff)
-		{
-			TimeBlock::updateTimes();
-		}
+		TimeBlock::updateTimes();
 		prev_active_recording.handOffTo(active_recording->mPartialRecording);
 	}
 	mActiveRecordings.push_back(active_recording);