Pulled from viewer-2-0

1 files changed, 751 insertions, 0 deletions

diff --git a/indra/llcommon/llfasttimer_class.cpp b/indra/llcommon/llfasttimer_class.cpp
new file mode 100644
index 0000000000..fae0a66873
--- /dev/null
+++ b/indra/llcommon/llfasttimer_class.cpp
@@ -0,0 +1,751 @@
+/** 
+ * @file llfasttimer_class.cpp
+ * @brief Implementation of the fast timer.
+ *
+ * $LicenseInfo:firstyear=2004&license=viewergpl$
+ * 
+ * Copyright (c) 2004-2007, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS."LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+#include "linden_common.h"
+
+#include "llfasttimer.h"
+
+#include "llmemory.h"
+#include "llprocessor.h"
+#include "llsingleton.h"
+#include "lltreeiterators.h"
+#include "llsdserialize.h"
+
+#include <boost/bind.hpp>
+
+#if LL_WINDOWS
+#elif LL_LINUX || LL_SOLARIS
+#include <sys/time.h>
+#include <sched.h>
+#elif LL_DARWIN
+#include <sys/time.h>
+#include "lltimer.h"	// get_clock_count()
+#else 
+#error "architecture not supported"
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+// statics
+
+S32 LLFastTimer::sCurFrameIndex = -1;
+S32 LLFastTimer::sLastFrameIndex = -1;
+U64 LLFastTimer::sLastFrameTime = LLFastTimer::getCPUClockCount64();
+bool LLFastTimer::sPauseHistory = 0;
+bool LLFastTimer::sResetHistory = 0;
+LLFastTimer::CurTimerData LLFastTimer::sCurTimerData;
+BOOL LLFastTimer::sLog = FALSE;
+BOOL LLFastTimer::sMetricLog = FALSE;
+LLMutex* LLFastTimer::sLogLock = NULL;
+std::queue<LLSD> LLFastTimer::sLogQueue;
+
+#if LL_LINUX || LL_SOLARIS
+U64 LLFastTimer::sClockResolution = 1000000000; // Nanosecond resolution
+#else
+U64 LLFastTimer::sClockResolution = 1000000; // Microsecond resolution
+#endif
+
+std::vector<LLFastTimer::FrameState>* LLFastTimer::sTimerInfos = NULL;
+U64				LLFastTimer::sTimerCycles = 0;
+U32				LLFastTimer::sTimerCalls = 0;
+
+
+// FIXME: move these declarations to the relevant modules
+
+// helper functions
+typedef LLTreeDFSPostIter<LLFastTimer::NamedTimer, LLFastTimer::NamedTimer::child_const_iter> timer_tree_bottom_up_iterator_t;
+
+static timer_tree_bottom_up_iterator_t begin_timer_tree_bottom_up(LLFastTimer::NamedTimer& id) 
+{ 
+	return timer_tree_bottom_up_iterator_t(&id, 
+							boost::bind(boost::mem_fn(&LLFastTimer::NamedTimer::beginChildren), _1), 
+							boost::bind(boost::mem_fn(&LLFastTimer::NamedTimer::endChildren), _1));
+}
+
+static timer_tree_bottom_up_iterator_t end_timer_tree_bottom_up() 
+{ 
+	return timer_tree_bottom_up_iterator_t(); 
+}
+
+typedef LLTreeDFSIter<LLFastTimer::NamedTimer, LLFastTimer::NamedTimer::child_const_iter> timer_tree_dfs_iterator_t;
+
+
+static timer_tree_dfs_iterator_t begin_timer_tree(LLFastTimer::NamedTimer& id) 
+{ 
+	return timer_tree_dfs_iterator_t(&id, 
+		boost::bind(boost::mem_fn(&LLFastTimer::NamedTimer::beginChildren), _1), 
+							boost::bind(boost::mem_fn(&LLFastTimer::NamedTimer::endChildren), _1));
+}
+
+static timer_tree_dfs_iterator_t end_timer_tree() 
+{ 
+	return timer_tree_dfs_iterator_t(); 
+}
+
+
+
+// factory class that creates NamedTimers via static DeclareTimer objects
+class NamedTimerFactory : public LLSingleton<NamedTimerFactory>
+{
+public:
+	NamedTimerFactory() 
+	{}
+
+	/*virtual */ void initSingleton()
+	{
+		mTimerRoot = new LLFastTimer::NamedTimer("root");
+
+		mActiveTimerRoot = new LLFastTimer::NamedTimer("Frame");
+		mActiveTimerRoot->setCollapsed(false);
+
+		mRootFrameState = new LLFastTimer::FrameState(mActiveTimerRoot);
+		mRootFrameState->mParent = &mTimerRoot->getFrameState();
+		mActiveTimerRoot->setParent(mTimerRoot);
+
+		mAppTimer = new LLFastTimer(mRootFrameState);
+	}
+
+	~NamedTimerFactory()
+	{
+		std::for_each(mTimers.begin(), mTimers.end(), DeletePairedPointer());
+
+		delete mAppTimer;
+		delete mActiveTimerRoot; 
+		delete mTimerRoot;
+		delete mRootFrameState;
+	}
+
+	LLFastTimer::NamedTimer& createNamedTimer(const std::string& name)
+	{
+		timer_map_t::iterator found_it = mTimers.find(name);
+		if (found_it != mTimers.end())
+		{
+			return *found_it->second;
+		}
+
+		LLFastTimer::NamedTimer* timer = new LLFastTimer::NamedTimer(name);
+		timer->setParent(mTimerRoot);
+		mTimers.insert(std::make_pair(name, timer));
+
+		return *timer;
+	}
+
+	LLFastTimer::NamedTimer* getTimerByName(const std::string& name)
+	{
+		timer_map_t::iterator found_it = mTimers.find(name);
+		if (found_it != mTimers.end())
+		{
+			return found_it->second;
+		}
+		return NULL;
+	}
+
+	LLFastTimer::NamedTimer* getActiveRootTimer() { return mActiveTimerRoot; }
+	LLFastTimer::NamedTimer* getRootTimer() { return mTimerRoot; }
+	const LLFastTimer* getAppTimer() { return mAppTimer; }
+	LLFastTimer::FrameState& getRootFrameState() { return *mRootFrameState; }
+
+	typedef std::map<std::string, LLFastTimer::NamedTimer*> timer_map_t;
+	timer_map_t::iterator beginTimers() { return mTimers.begin(); }
+	timer_map_t::iterator endTimers() { return mTimers.end(); }
+	S32 timerCount() { return mTimers.size(); }
+
+private:
+	timer_map_t mTimers;
+
+	LLFastTimer::NamedTimer*		mActiveTimerRoot;
+	LLFastTimer::NamedTimer*		mTimerRoot;
+	LLFastTimer*						mAppTimer;
+	LLFastTimer::FrameState*		mRootFrameState;
+};
+
+void update_cached_pointers_if_changed()
+{
+	// detect when elements have moved and update cached pointers
+	static LLFastTimer::FrameState* sFirstTimerAddress = NULL;
+	if (&*(LLFastTimer::getFrameStateList().begin()) != sFirstTimerAddress)
+	{
+		LLFastTimer::DeclareTimer::updateCachedPointers();
+	}
+	sFirstTimerAddress = &*(LLFastTimer::getFrameStateList().begin());
+}
+
+LLFastTimer::DeclareTimer::DeclareTimer(const std::string& name, bool open )
+:	mTimer(NamedTimerFactory::instance().createNamedTimer(name))
+{
+	mTimer.setCollapsed(!open);
+	mFrameState = &mTimer.getFrameState();
+	update_cached_pointers_if_changed();
+}
+
+LLFastTimer::DeclareTimer::DeclareTimer(const std::string& name)
+:	mTimer(NamedTimerFactory::instance().createNamedTimer(name))
+{
+	mFrameState = &mTimer.getFrameState();
+	update_cached_pointers_if_changed();
+}
+
+// static
+void LLFastTimer::DeclareTimer::updateCachedPointers()
+{
+	// propagate frame state pointers to timer declarations
+	for (DeclareTimer::instance_iter it = DeclareTimer::beginInstances();
+		it != DeclareTimer::endInstances();
+		++it)
+	{
+		// update cached pointer
+		it->mFrameState = &it->mTimer.getFrameState();
+	}
+}
+
+//static
+#if LL_LINUX || LL_SOLARIS || ( LL_DARWIN && !(defined(__i386__) || defined(__amd64__)) )
+U64 LLFastTimer::countsPerSecond() // counts per second for the *32-bit* timer
+{
+	return sClockResolution >> 8;
+}
+#else // windows or x86-mac
+U64 LLFastTimer::countsPerSecond() // counts per second for the *32-bit* timer
+{
+	static U64 sCPUClockFrequency = U64(CProcessor().GetCPUFrequency(50));
+
+	// we drop the low-order byte in out timers, so report a lower frequency
+	return sCPUClockFrequency >> 8;
+}
+#endif
+
+LLFastTimer::FrameState::FrameState(LLFastTimer::NamedTimer* timerp)
+:	mActiveCount(0),
+	mCalls(0),
+	mSelfTimeCounter(0),
+	mParent(NULL),
+	mLastCaller(NULL),
+	mMoveUpTree(false),
+	mTimer(timerp)
+{}
+
+
+LLFastTimer::NamedTimer::NamedTimer(const std::string& name)
+:	mName(name),
+	mCollapsed(true),
+	mParent(NULL),
+	mTotalTimeCounter(0),
+	mCountAverage(0),
+	mCallAverage(0),
+	mNeedsSorting(false)
+{
+	info_list_t& frame_state_list = getFrameStateList();
+	mFrameStateIndex = frame_state_list.size();
+	getFrameStateList().push_back(FrameState(this));
+
+	mCountHistory = new U32[HISTORY_NUM];
+	memset(mCountHistory, 0, sizeof(U32) * HISTORY_NUM);
+	mCallHistory = new U32[HISTORY_NUM];
+	memset(mCallHistory, 0, sizeof(U32) * HISTORY_NUM);
+}
+
+LLFastTimer::NamedTimer::~NamedTimer()
+{
+	delete[] mCountHistory;
+	delete[] mCallHistory;
+}
+
+std::string LLFastTimer::NamedTimer::getToolTip(S32 history_idx)
+{
+	if (history_idx < 0)
+	{
+		// by default, show average number of calls
+		return llformat("%s (%d calls)", getName().c_str(), (S32)getCallAverage());
+	}
+	else
+	{
+		return llformat("%s (%d calls)", getName().c_str(), (S32)getHistoricalCalls(history_idx));
+	}
+}
+
+void LLFastTimer::NamedTimer::setParent(NamedTimer* parent)
+{
+	llassert_always(parent != this);
+	llassert_always(parent != NULL);
+
+	if (mParent)
+	{
+		// subtract our accumulated from previous parent
+		for (S32 i = 0; i < HISTORY_NUM; i++)
+		{
+			mParent->mCountHistory[i] -= mCountHistory[i];
+		}
+
+		// subtract average timing from previous parent
+		mParent->mCountAverage -= mCountAverage;
+
+		std::vector<NamedTimer*>& children = mParent->getChildren();
+		std::vector<NamedTimer*>::iterator found_it = std::find(children.begin(), children.end(), this);
+		if (found_it != children.end())
+		{
+			children.erase(found_it);
+		}
+	}
+
+	mParent = parent;
+	if (parent)
+	{
+		getFrameState().mParent = &parent->getFrameState();
+		parent->getChildren().push_back(this);
+		parent->mNeedsSorting = true;
+	}
+}
+
+S32 LLFastTimer::NamedTimer::getDepth()
+{
+	S32 depth = 0;
+	NamedTimer* timerp = mParent;
+	while(timerp)
+	{
+		depth++;
+		timerp = timerp->mParent;
+	}
+	return depth;
+}
+
+// static
+void LLFastTimer::NamedTimer::processTimes()
+{
+	if (sCurFrameIndex < 0) return;
+
+	buildHierarchy();
+	accumulateTimings();
+}
+
+// sort timer info structs by depth first traversal order
+struct SortTimersDFS
+{
+	bool operator()(const LLFastTimer::FrameState& i1, const LLFastTimer::FrameState& i2)
+	{
+		return i1.mTimer->getFrameStateIndex() < i2.mTimer->getFrameStateIndex();
+	}
+};
+
+// sort child timers by name
+struct SortTimerByName
+{
+	bool operator()(const LLFastTimer::NamedTimer* i1, const LLFastTimer::NamedTimer* i2)
+	{
+		return i1->getName() < i2->getName();
+	}
+};
+
+//static
+void LLFastTimer::NamedTimer::buildHierarchy()
+{
+	if (sCurFrameIndex < 0 ) return;
+
+	// set up initial tree
+    for (instance_iter it = NamedTimer::beginInstances();
+		it != endInstances();
+		++it)
+	{
+		NamedTimer& timer = *it;
+		if (&timer == NamedTimerFactory::instance().getRootTimer()) continue;
+
+		// bootstrap tree construction by attaching to last timer to be on stack
+		// when this timer was called
+		if (timer.getFrameState().mLastCaller && timer.mParent == NamedTimerFactory::instance().getRootTimer())
+		{
+			timer.setParent(timer.getFrameState().mLastCaller->mTimer);
+			// no need to push up tree on first use, flag can be set spuriously
+			timer.getFrameState().mMoveUpTree = false;
+		}
+	}
+
+	// bump timers up tree if they've been flagged as being in the wrong place
+	// do this in a bottom up order to promote descendants first before promoting ancestors
+	// this preserves partial order derived from current frame's observations
+	for(timer_tree_bottom_up_iterator_t it = begin_timer_tree_bottom_up(*NamedTimerFactory::instance().getRootTimer());
+		it != end_timer_tree_bottom_up();
+		++it)
+	{
+		NamedTimer* timerp = *it;
+		// skip root timer
+		if (timerp == NamedTimerFactory::instance().getRootTimer()) continue;
+
+		if (timerp->getFrameState().mMoveUpTree)
+		{
+			// since ancestors have already been visited, reparenting won't affect tree traversal
+			//step up tree, bringing our descendants with us
+			//llinfos << "Moving " << timerp->getName() << " from child of " << timerp->getParent()->getName() <<
+			//	" to child of " << timerp->getParent()->getParent()->getName() << llendl;
+			timerp->setParent(timerp->getParent()->getParent());
+			timerp->getFrameState().mMoveUpTree = false;
+
+			// don't bubble up any ancestors until descendants are done bubbling up
+			it.skipAncestors();
+		}
+	}
+
+	// sort timers by time last called, so call graph makes sense
+	for(timer_tree_dfs_iterator_t it = begin_timer_tree(*NamedTimerFactory::instance().getRootTimer());
+		it != end_timer_tree();
+		++it)
+	{
+		NamedTimer* timerp = (*it);
+		if (timerp->mNeedsSorting)
+		{
+			std::sort(timerp->getChildren().begin(), timerp->getChildren().end(), SortTimerByName());
+		}
+		timerp->mNeedsSorting = false;
+	}
+}
+
+//static
+void LLFastTimer::NamedTimer::accumulateTimings()
+{
+	U32 cur_time = getCPUClockCount32();
+
+	// walk up stack of active timers and accumulate current time while leaving timing structures active
+	LLFastTimer* cur_timer = sCurTimerData.mCurTimer;
+	// root defined by parent pointing to self
+	CurTimerData* cur_data = &sCurTimerData;
+	while(cur_timer->mLastTimerData.mCurTimer != cur_timer)
+	{
+		U32 cumulative_time_delta = cur_time - cur_timer->mStartTime;
+		U32 self_time_delta = cumulative_time_delta - cur_data->mChildTime;
+		cur_data->mChildTime = 0;
+		cur_timer->mFrameState->mSelfTimeCounter += self_time_delta;
+		cur_timer->mStartTime = cur_time;
+
+		cur_data = &cur_timer->mLastTimerData;
+		cur_data->mChildTime += cumulative_time_delta;
+
+		cur_timer = cur_timer->mLastTimerData.mCurTimer;
+	}
+
+	// traverse tree in DFS post order, or bottom up
+	for(timer_tree_bottom_up_iterator_t it = begin_timer_tree_bottom_up(*NamedTimerFactory::instance().getActiveRootTimer());
+		it != end_timer_tree_bottom_up();
+		++it)
+	{
+		NamedTimer* timerp = (*it);
+		timerp->mTotalTimeCounter = timerp->getFrameState().mSelfTimeCounter;
+		for (child_const_iter child_it = timerp->beginChildren(); child_it != timerp->endChildren(); ++child_it)
+		{
+			timerp->mTotalTimeCounter += (*child_it)->mTotalTimeCounter;
+		}
+
+		S32 cur_frame = sCurFrameIndex;
+		if (cur_frame >= 0)
+		{
+			// update timer history
+			int hidx = cur_frame % HISTORY_NUM;
+
+			timerp->mCountHistory[hidx] = timerp->mTotalTimeCounter;
+			timerp->mCountAverage = (timerp->mCountAverage * cur_frame + timerp->mTotalTimeCounter) / (cur_frame+1);
+			timerp->mCallHistory[hidx] = timerp->getFrameState().mCalls;
+			timerp->mCallAverage = (timerp->mCallAverage * cur_frame + timerp->getFrameState().mCalls) / (cur_frame+1);
+		}
+	}
+}
+
+// static
+void LLFastTimer::NamedTimer::resetFrame()
+{
+	if (sLog)
+	{ //output current frame counts to performance log
+		F64 iclock_freq = 1000.0 / countsPerSecond(); // good place to calculate clock frequency
+
+		F64 total_time = 0;
+		LLSD sd;
+
+		for (NamedTimer::instance_iter it = NamedTimer::beginInstances();
+					it != NamedTimer::endInstances();
+					++it)
+		{
+			NamedTimer& timer = *it;
+			FrameState& info = timer.getFrameState();
+			sd[timer.getName()]["Time"] = (LLSD::Real) (info.mSelfTimeCounter*iclock_freq);	
+			sd[timer.getName()]["Calls"] = (LLSD::Integer) info.mCalls;
+			
+			// computing total time here because getting the root timer's getCountHistory
+			// doesn't work correctly on the first frame
+			total_time = total_time + info.mSelfTimeCounter * iclock_freq;
+		}
+
+		sd["Total"]["Time"] = (LLSD::Real) total_time;
+		sd["Total"]["Calls"] = (LLSD::Integer) 1;
+
+		{		
+			LLMutexLock lock(sLogLock);
+			sLogQueue.push(sd);
+		}
+	}
+
+
+	// tag timers by position in depth first traversal of tree
+	S32 index = 0;
+	for(timer_tree_dfs_iterator_t it = begin_timer_tree(*NamedTimerFactory::instance().getRootTimer());
+		it != end_timer_tree();
+		++it)
+	{
+		NamedTimer* timerp = (*it);
+		
+		timerp->mFrameStateIndex = index;
+		index++;
+
+		llassert_always(timerp->mFrameStateIndex < (S32)getFrameStateList().size());
+	}
+
+	// sort timers by dfs traversal order to improve cache coherency
+	std::sort(getFrameStateList().begin(), getFrameStateList().end(), SortTimersDFS());
+
+	// update pointers into framestatelist now that we've sorted it
+	DeclareTimer::updateCachedPointers();
+
+	// reset for next frame
+	for (NamedTimer::instance_iter it = NamedTimer::beginInstances();
+		it != NamedTimer::endInstances();
+		++it)
+	{
+		NamedTimer& timer = *it;
+
+		FrameState& info = timer.getFrameState();
+		info.mSelfTimeCounter = 0;
+		info.mCalls = 0;
+		info.mLastCaller = NULL;
+		info.mMoveUpTree = false;
+		// update parent pointer in timer state struct
+		if (timer.mParent)
+		{
+			info.mParent = &timer.mParent->getFrameState();
+		}
+	}
+
+	//sTimerCycles = 0;
+	//sTimerCalls = 0;
+}
+
+//static
+void LLFastTimer::NamedTimer::reset()
+{
+	resetFrame(); // reset frame data
+
+	// walk up stack of active timers and reset start times to current time
+	// effectively zeroing out any accumulated time
+	U32 cur_time = getCPUClockCount32();
+
+	// root defined by parent pointing to self
+	CurTimerData* cur_data = &sCurTimerData;
+	LLFastTimer* cur_timer = cur_data->mCurTimer;
+	while(cur_timer->mLastTimerData.mCurTimer != cur_timer)
+	{
+		cur_timer->mStartTime = cur_time;
+		cur_data->mChildTime = 0;
+
+		cur_data = &cur_timer->mLastTimerData;
+		cur_timer = cur_data->mCurTimer;
+	}
+
+	// reset all history
+	for (NamedTimer::instance_iter it = NamedTimer::beginInstances();
+		it != NamedTimer::endInstances();
+		++it)
+	{
+		NamedTimer& timer = *it;
+		if (&timer != NamedTimerFactory::instance().getRootTimer()) 
+		{
+			timer.setParent(NamedTimerFactory::instance().getRootTimer());
+		}
+
+		timer.mCountAverage = 0;
+		timer.mCallAverage = 0;
+		memset(timer.mCountHistory, 0, sizeof(U32) * HISTORY_NUM);
+		memset(timer.mCallHistory, 0, sizeof(U32) * HISTORY_NUM);
+	}
+
+	sLastFrameIndex = 0;
+	sCurFrameIndex = 0;
+}
+
+//static 
+LLFastTimer::info_list_t& LLFastTimer::getFrameStateList() 
+{ 
+	if (!sTimerInfos) 
+	{ 
+		sTimerInfos = new info_list_t(); 
+	} 
+	return *sTimerInfos; 
+}
+
+
+U32 LLFastTimer::NamedTimer::getHistoricalCount(S32 history_index) const
+{
+	S32 history_idx = (getLastFrameIndex() + history_index) % LLFastTimer::NamedTimer::HISTORY_NUM;
+	return mCountHistory[history_idx];
+}
+
+U32 LLFastTimer::NamedTimer::getHistoricalCalls(S32 history_index ) const
+{
+	S32 history_idx = (getLastFrameIndex() + history_index) % LLFastTimer::NamedTimer::HISTORY_NUM;
+	return mCallHistory[history_idx];
+}
+
+LLFastTimer::FrameState& LLFastTimer::NamedTimer::getFrameState() const
+{
+	llassert_always(mFrameStateIndex >= 0);
+	if (this == NamedTimerFactory::instance().getActiveRootTimer()) 
+	{
+		return NamedTimerFactory::instance().getRootFrameState();
+	}
+	return getFrameStateList()[mFrameStateIndex];
+}
+
+// static
+LLFastTimer::NamedTimer& LLFastTimer::NamedTimer::getRootNamedTimer()
+{ 
+	return *NamedTimerFactory::instance().getActiveRootTimer(); 
+}
+
+std::vector<LLFastTimer::NamedTimer*>::const_iterator LLFastTimer::NamedTimer::beginChildren()
+{ 
+	return mChildren.begin(); 
+}
+
+std::vector<LLFastTimer::NamedTimer*>::const_iterator LLFastTimer::NamedTimer::endChildren()
+{
+	return mChildren.end();
+}
+
+std::vector<LLFastTimer::NamedTimer*>& LLFastTimer::NamedTimer::getChildren()
+{
+	return mChildren;
+}
+
+//static
+void LLFastTimer::nextFrame()
+{
+	countsPerSecond(); // good place to calculate clock frequency
+	U64 frame_time = getCPUClockCount64();
+	if ((frame_time - sLastFrameTime) >> 8 > 0xffffffff)
+	{
+		llinfos << "Slow frame, fast timers inaccurate" << llendl;
+	}
+
+	if (sPauseHistory)
+	{
+		sResetHistory = true;
+	}
+	else if (sResetHistory)
+	{
+		sLastFrameIndex = 0;
+		sCurFrameIndex = 0;
+		sResetHistory = false;
+	}
+	else // not paused
+	{
+		NamedTimer::processTimes();
+		sLastFrameIndex = sCurFrameIndex++;
+	}
+	
+	// get ready for next frame
+	NamedTimer::resetFrame();
+	sLastFrameTime = frame_time;
+}
+
+//static
+void LLFastTimer::dumpCurTimes()
+{
+	// accumulate timings, etc.
+	NamedTimer::processTimes();
+	
+	F64 clock_freq = (F64)countsPerSecond();
+	F64 iclock_freq = 1000.0 / clock_freq; // clock_ticks -> milliseconds
+
+	// walk over timers in depth order and output timings
+	for(timer_tree_dfs_iterator_t it = begin_timer_tree(*NamedTimerFactory::instance().getRootTimer());
+		it != end_timer_tree();
+		++it)
+	{
+		NamedTimer* timerp = (*it);
+		F64 total_time_ms = ((F64)timerp->getHistoricalCount(0) * iclock_freq);
+		// Don't bother with really brief times, keep output concise
+		if (total_time_ms < 0.1) continue;
+
+		std::ostringstream out_str;
+		for (S32 i = 0; i < timerp->getDepth(); i++)
+		{
+			out_str << "\t";
+		}
+
+
+		out_str << timerp->getName() << " " 
+			<< std::setprecision(3) << total_time_ms << " ms, "
+			<< timerp->getHistoricalCalls(0) << " calls";
+
+		llinfos << out_str.str() << llendl;
+	}
+}
+
+//static 
+void LLFastTimer::reset()
+{
+	NamedTimer::reset();
+}
+
+
+//static
+void LLFastTimer::writeLog(std::ostream& os)
+{
+	while (!sLogQueue.empty())
+	{
+		LLSD& sd = sLogQueue.front();
+		LLSDSerialize::toXML(sd, os);
+		LLMutexLock lock(sLogLock);
+		sLogQueue.pop();
+	}
+}
+
+//static
+const LLFastTimer::NamedTimer* LLFastTimer::getTimerByName(const std::string& name)
+{
+	return NamedTimerFactory::instance().getTimerByName(name);
+}
+
+LLFastTimer::LLFastTimer(LLFastTimer::FrameState* state)
+:	mFrameState(state)
+{
+	U32 start_time = getCPUClockCount32();
+	mStartTime = start_time;
+	mFrameState->mActiveCount++;
+	LLFastTimer::sCurTimerData.mCurTimer = this;
+	LLFastTimer::sCurTimerData.mFrameState = mFrameState;
+	LLFastTimer::sCurTimerData.mChildTime = 0;
+	mLastTimerData = LLFastTimer::sCurTimerData;
+}
+
+
+//////////////////////////////////////////////////////////////////////////////