SH-3404 create sampler class

renamed LLTrace::ThreadTrace to LLTrace::ThreadRecorder
renamed LLTrace::Sampler to LLTrace::Recording

15 files changed, 187 insertions, 195 deletions

diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt
index e10dbb3e4d..1ccee23e1e 100644
--- a/indra/llcommon/CMakeLists.txt
+++ b/indra/llcommon/CMakeLists.txt
@@ -101,7 +101,7 @@ set(llcommon_SOURCE_FILES
     llthreadsafequeue.cpp
     lltimer.cpp
     lltrace.cpp
-    lltracesampler.cpp
+    lltracerecording.cpp
     lluri.cpp
     lluuid.cpp
     llworkerthread.cpp
@@ -244,7 +244,7 @@ set(llcommon_HEADER_FILES
     llthreadsafequeue.h
     lltimer.h
     lltrace.h
-    lltracesampler.h
+    lltracerecording.h
     lltreeiterators.h
     lltypeinfolookup.h
     lluri.h
diff --git a/indra/llcommon/llapr.cpp b/indra/llcommon/llapr.cpp
index d23b70690d..1db3aa9e89 100644
--- a/indra/llcommon/llapr.cpp
+++ b/indra/llcommon/llapr.cpp
@@ -486,29 +486,6 @@ S32 LLAPRFile::seek(apr_seek_where_t where, S32 offset)
 //
 bool LLThreadLocalPointerBase::sInitialized = false;
 
-LLThreadLocalPointerBase::LLThreadLocalPointerBase()
-:	mThreadKey(NULL)
-{
-	if (sInitialized)
-	{
-		initStorage();
-	}
-}
-
-LLThreadLocalPointerBase::LLThreadLocalPointerBase( const LLThreadLocalPointerBase& other)
-:	mThreadKey(NULL)
-{
-	if (sInitialized)
-	{
-		initStorage();
-	}
-}
-
-LLThreadLocalPointerBase::~LLThreadLocalPointerBase()
-{
-	destroyStorage();
-}
-
 void LLThreadLocalPointerBase::set( void* value )
 {
 	llassert(sInitialized && mThreadKey);
diff --git a/indra/llcommon/llapr.h b/indra/llcommon/llapr.h
index 6efb44a663..821274aeb3 100644
--- a/indra/llcommon/llapr.h
+++ b/indra/llcommon/llapr.h
@@ -261,9 +261,28 @@ public:
 class LLThreadLocalPointerBase : LLInstanceTracker<LLThreadLocalPointerBase>
 {
 public:
-	LLThreadLocalPointerBase();
-	LLThreadLocalPointerBase(const LLThreadLocalPointerBase& other);
-	~LLThreadLocalPointerBase();
+	LLThreadLocalPointerBase()
+	:	mThreadKey(NULL)
+	{
+		if (sInitialized)
+		{
+			initStorage();
+		}
+	}
+
+	LLThreadLocalPointerBase( const LLThreadLocalPointerBase& other)
+		:	mThreadKey(NULL)
+	{
+		if (sInitialized)
+		{
+			initStorage();
+		}
+	}
+
+	~LLThreadLocalPointerBase()
+	{
+		destroyStorage();
+	}
 
 	static void initAllThreadLocalStorage();
 	static void destroyAllThreadLocalStorage();
@@ -312,7 +331,6 @@ class LLThreadLocalPointer : public LLThreadLocalPointerBase
 public:
 
 	LLThreadLocalPointer()
-	:	LLThreadLocalPointerBase()
 	{}
 
 	explicit LLThreadLocalPointer(T* value)
diff --git a/indra/llcommon/llqueuedthread.cpp b/indra/llcommon/llqueuedthread.cpp
index 9aa449d037..6e2a2b140f 100644
--- a/indra/llcommon/llqueuedthread.cpp
+++ b/indra/llcommon/llqueuedthread.cpp
@@ -112,7 +112,7 @@ void LLQueuedThread::shutdown()
 // virtual
 S32 LLQueuedThread::update(F32 max_time_ms)
 {
-	LLTrace::get_thread_trace()->pushToMaster();
+	LLTrace::get_thread_recorder()->pushToMaster();
 
 	if (!mStarted)
 	{
diff --git a/indra/llcommon/llthread.cpp b/indra/llcommon/llthread.cpp
index c705e5103b..6723e427f5 100644
--- a/indra/llcommon/llthread.cpp
+++ b/indra/llcommon/llthread.cpp
@@ -85,7 +85,7 @@ void *APR_THREAD_FUNC LLThread::staticRun(apr_thread_t *apr_threadp, void *datap
 {
 	LLThread *threadp = (LLThread *)datap;
 
-	LLTrace::ThreadTrace* thread_trace = new LLTrace::SlaveThreadTrace();
+	LLTrace::ThreadRecorder* thread_recorder = new LLTrace::SlaveThreadRecorder();
 
 #if !LL_DARWIN
 	sThreadIndex = threadp->mID;
@@ -99,7 +99,7 @@ void *APR_THREAD_FUNC LLThread::staticRun(apr_thread_t *apr_threadp, void *datap
 	// We're done with the run function, this thread is done executing now.
 	threadp->mStatus = STOPPED;
 
-	delete thread_trace;
+	delete thread_recorder;
 
 	return NULL;
 }
diff --git a/indra/llcommon/lltrace.cpp b/indra/llcommon/lltrace.cpp
index 04817fd4f4..6b4c3aeb06 100644
--- a/indra/llcommon/lltrace.cpp
+++ b/indra/llcommon/lltrace.cpp
@@ -26,28 +26,28 @@
 #include "linden_common.h"
 
 #include "lltrace.h"
-#include "lltracesampler.h"
+#include "lltracerecording.h"
 
 namespace LLTrace
 {
 
-static MasterThreadTrace* gMasterThreadTrace = NULL;
+static MasterThreadRecorder* gMasterThreadRecorder = NULL;
 
 void init()
 {
-	gMasterThreadTrace = new MasterThreadTrace();
+	gMasterThreadRecorder = new MasterThreadRecorder();
 }
 
 void cleanup()
 {
-	delete gMasterThreadTrace;
-	gMasterThreadTrace = NULL;
+	delete gMasterThreadRecorder;
+	gMasterThreadRecorder = NULL;
 }
 
-LLThreadLocalPointer<ThreadTrace>& get_thread_trace()
+LLThreadLocalPointer<ThreadRecorder>& get_thread_recorder()
 {
-	static LLThreadLocalPointer<ThreadTrace> s_trace_data;
-	return s_trace_data;
+	static LLThreadLocalPointer<ThreadRecorder> s_thread_recorder;
+	return s_thread_recorder;
 
 }
 
@@ -55,164 +55,161 @@ BlockTimer::Recorder::StackEntry BlockTimer::sCurRecorder;
 
 
 
-MasterThreadTrace& getMasterThreadTrace()
+MasterThreadRecorder& getMasterThreadRecorder()
 {
-	llassert(gMasterThreadTrace != NULL);
-	return *gMasterThreadTrace;
+	llassert(gMasterThreadRecorder != NULL);
+	return *gMasterThreadRecorder;
 }
 
 ///////////////////////////////////////////////////////////////////////
-// MasterThreadTrace
+// ThreadRecorder
 ///////////////////////////////////////////////////////////////////////
 
-ThreadTrace::ThreadTrace()
+ThreadRecorder::ThreadRecorder()
 {
-	get_thread_trace() = this;
-	mPrimarySampler.makePrimary();
-	mTotalSampler.start();
+	get_thread_recorder() = this;
+	mPrimaryRecording.makePrimary();
+	mFullRecording.start();
 }
 
-ThreadTrace::ThreadTrace( const ThreadTrace& other ) 
-:	mPrimarySampler(other.mPrimarySampler),
-	mTotalSampler(other.mTotalSampler)
+ThreadRecorder::ThreadRecorder( const ThreadRecorder& other ) 
+:	mPrimaryRecording(other.mPrimaryRecording),
+	mFullRecording(other.mFullRecording)
 {
-	get_thread_trace() = this;
-	mPrimarySampler.makePrimary();
-	mTotalSampler.start();
+	get_thread_recorder() = this;
+	mPrimaryRecording.makePrimary();
+	mFullRecording.start();
 }
 
-ThreadTrace::~ThreadTrace()
+ThreadRecorder::~ThreadRecorder()
 {
-	get_thread_trace() = NULL;
+	get_thread_recorder() = NULL;
 }
 
-//TODO: remove this and use llviewerstats sampler
-Sampler* ThreadTrace::getPrimarySampler()
+//TODO: remove this and use llviewerstats recording
+Recording* ThreadRecorder::getPrimaryRecording()
 {
-	return &mPrimarySampler;
+	return &mPrimaryRecording;
 }
 
-void ThreadTrace::activate( Sampler* sampler )
+void ThreadRecorder::activate( Recording* recorder )
 {
-	for (std::list<Sampler*>::iterator it = mActiveSamplers.begin(), end_it = mActiveSamplers.end();
+	for (std::list<Recording*>::iterator it = mActiveRecordings.begin(), end_it = mActiveRecordings.end();
 		it != end_it;
 		++it)
 	{
-		(*it)->mMeasurements.write()->mergeSamples(*mPrimarySampler.mMeasurements);
+		(*it)->mMeasurements.write()->mergeSamples(*mPrimaryRecording.mMeasurements);
 	}
-	mPrimarySampler.mMeasurements.write()->reset();
+	mPrimaryRecording.mMeasurements.write()->reset();
 
-	sampler->initDeltas(mPrimarySampler);
+	recorder->initDeltas(mPrimaryRecording);
 
-	mActiveSamplers.push_front(sampler);
+	mActiveRecordings.push_front(recorder);
 }
 
 //TODO: consider merging results down the list to one past the buffered item.
 // this would require 2 buffers per sampler, to separate current total from running total
 
-void ThreadTrace::deactivate( Sampler* sampler )
+void ThreadRecorder::deactivate( Recording* recorder )
 {
-	sampler->mergeDeltas(mPrimarySampler);
+	recorder->mergeDeltas(mPrimaryRecording);
 
 	// TODO: replace with intrusive list
-	std::list<Sampler*>::iterator found_it = std::find(mActiveSamplers.begin(), mActiveSamplers.end(), sampler);
-	if (found_it != mActiveSamplers.end())
+	std::list<Recording*>::iterator found_it = std::find(mActiveRecordings.begin(), mActiveRecordings.end(), recorder);
+	if (found_it != mActiveRecordings.end())
 	{
-		mActiveSamplers.erase(found_it);
+		mActiveRecordings.erase(found_it);
 	}
 }
 
 ///////////////////////////////////////////////////////////////////////
-// SlaveThreadTrace
+// SlaveThreadRecorder
 ///////////////////////////////////////////////////////////////////////
 
-SlaveThreadTrace::SlaveThreadTrace()
-:	ThreadTrace(getMasterThreadTrace())
+SlaveThreadRecorder::SlaveThreadRecorder()
+:	ThreadRecorder(getMasterThreadRecorder())
 {
-	getMasterThreadTrace().addSlaveThread(this);
+	getMasterThreadRecorder().addSlaveThread(this);
 }
 
-SlaveThreadTrace::~SlaveThreadTrace()
+SlaveThreadRecorder::~SlaveThreadRecorder()
 {
-	getMasterThreadTrace().removeSlaveThread(this);
+	getMasterThreadRecorder().removeSlaveThread(this);
 }
 
-void SlaveThreadTrace::pushToMaster()
+void SlaveThreadRecorder::pushToMaster()
 {
-	mTotalSampler.stop();
+	mFullRecording.stop();
 	{
-		LLMutexLock(getMasterThreadTrace().getSlaveListMutex());
-		mSharedData.copyFrom(mTotalSampler);
+		LLMutexLock(getMasterThreadRecorder().getSlaveListMutex());
+		mSharedData.copyFrom(mFullRecording);
 	}
-	mTotalSampler.start();
+	mFullRecording.start();
 }
 
-void SlaveThreadTrace::SharedData::copyFrom( const Sampler& source )
+void SlaveThreadRecorder::SharedData::copyFrom( const Recording& source )
 {
-	LLMutexLock lock(&mSamplerMutex);
-	mSampler.mergeSamples(source);
+	LLMutexLock lock(&mRecorderMutex);
+	mRecorder.mergeSamples(source);
 }
 
-void SlaveThreadTrace::SharedData::copyTo( Sampler& sink )
+void SlaveThreadRecorder::SharedData::copyTo( Recording& sink )
 {
-	LLMutexLock lock(&mSamplerMutex);
-	sink.mergeSamples(mSampler);
+	LLMutexLock lock(&mRecorderMutex);
+	sink.mergeSamples(mRecorder);
 }
 
-
-
-
 ///////////////////////////////////////////////////////////////////////
-// MasterThreadTrace
+// MasterThreadRecorder
 ///////////////////////////////////////////////////////////////////////
 
-void MasterThreadTrace::pullFromSlaveThreads()
+void MasterThreadRecorder::pullFromSlaveThreads()
 {
 	LLMutexLock lock(&mSlaveListMutex);
 
-	for (slave_thread_trace_list_t::iterator it = mSlaveThreadTraces.begin(), end_it = mSlaveThreadTraces.end();
+	for (slave_thread_recorder_list_t::iterator it = mSlaveThreadRecorders.begin(), end_it = mSlaveThreadRecorders.end();
 		it != end_it;
 		++it)
 	{
-		(*it)->mSlaveTrace->mSharedData.copyTo((*it)->mSamplerStorage);
+		(*it)->mRecorder->mSharedData.copyTo((*it)->mSlaveRecording);
 	}
 }
 
-void MasterThreadTrace::addSlaveThread( class SlaveThreadTrace* child )
+void MasterThreadRecorder::addSlaveThread( class SlaveThreadRecorder* child )
 {
 	LLMutexLock lock(&mSlaveListMutex);
 
-	mSlaveThreadTraces.push_back(new SlaveThreadTraceProxy(child));
+	mSlaveThreadRecorders.push_back(new SlaveThreadRecorderProxy(child));
 }
 
-void MasterThreadTrace::removeSlaveThread( class SlaveThreadTrace* child )
+void MasterThreadRecorder::removeSlaveThread( class SlaveThreadRecorder* child )
 {
 	LLMutexLock lock(&mSlaveListMutex);
 
-	for (slave_thread_trace_list_t::iterator it = mSlaveThreadTraces.begin(), end_it = mSlaveThreadTraces.end();
+	for (slave_thread_recorder_list_t::iterator it = mSlaveThreadRecorders.begin(), end_it = mSlaveThreadRecorders.end();
 		it != end_it;
 		++it)
 	{
-		if ((*it)->mSlaveTrace == child)
+		if ((*it)->mRecorder == child)
 		{
-			mSlaveThreadTraces.erase(it);
+			mSlaveThreadRecorders.erase(it);
 			break;
 		}
 	}
 }
 
-void MasterThreadTrace::pushToMaster()
+void MasterThreadRecorder::pushToMaster()
 {}
 
-MasterThreadTrace::MasterThreadTrace()
+MasterThreadRecorder::MasterThreadRecorder()
 {}
 
 ///////////////////////////////////////////////////////////////////////
-// MasterThreadTrace::SlaveThreadTraceProxy
+// MasterThreadRecorder::SlaveThreadTraceProxy
 ///////////////////////////////////////////////////////////////////////
 
-MasterThreadTrace::SlaveThreadTraceProxy::SlaveThreadTraceProxy( class SlaveThreadTrace* trace) 
-:	mSlaveTrace(trace)
+MasterThreadRecorder::SlaveThreadRecorderProxy::SlaveThreadRecorderProxy( class SlaveThreadRecorder* recorder) 
+:	mRecorder(recorder)
 {}
 
 }
diff --git a/indra/llcommon/lltrace.h b/indra/llcommon/lltrace.h
index 5ec1c821c3..c5356777ae 100644
--- a/indra/llcommon/lltrace.h
+++ b/indra/llcommon/lltrace.h
@@ -34,7 +34,7 @@
 #include "llmemory.h"
 #include "lltimer.h"
 #include "llrefcount.h"
-#include "lltracesampler.h"
+#include "lltracerecording.h"
 
 #include <list>
 
@@ -45,14 +45,14 @@
 
 namespace LLTrace
 {
-	class Sampler;
+	class Recording;
 
 	void init();
 	void cleanup();
 
-	LLThreadLocalPointer<class ThreadTrace>& get_thread_trace();
+	LLThreadLocalPointer<class ThreadRecorder>& get_thread_recorder();
 
-	class LL_COMMON_API MasterThreadTrace& getMasterThreadTrace();
+	class LL_COMMON_API MasterThreadRecorder& getMasterThreadRecorder();
 
 	// one per thread per type
 	template<typename ACCUMULATOR>
@@ -482,33 +482,33 @@ namespace LLTrace
 		static Recorder::StackEntry sCurRecorder;
 	};
 
-	class LL_COMMON_API ThreadTrace
+	class LL_COMMON_API ThreadRecorder
 	{
 	public:
-		ThreadTrace();
-		ThreadTrace(const ThreadTrace& other);
+		ThreadRecorder();
+		ThreadRecorder(const ThreadRecorder& other);
 
-		virtual ~ThreadTrace();
+		virtual ~ThreadRecorder();
 
-		void activate(Sampler* sampler);
-		void deactivate(Sampler* sampler);
+		void activate(Recording* recording);
+		void deactivate(Recording* recording);
 
 		virtual void pushToMaster() = 0;
 
-		Sampler* getPrimarySampler();
+		Recording* getPrimaryRecording();
 	protected:
-		Sampler					mPrimarySampler;
-		Sampler					mTotalSampler;
-		std::list<Sampler*>		mActiveSamplers;
+		Recording					mPrimaryRecording;
+		Recording					mFullRecording;
+		std::list<Recording*>		mActiveRecordings;
 	};
 
-	class LL_COMMON_API MasterThreadTrace : public ThreadTrace
+	class LL_COMMON_API MasterThreadRecorder : public ThreadRecorder
 	{
 	public:
-		MasterThreadTrace();
+		MasterThreadRecorder();
 
-		void addSlaveThread(class SlaveThreadTrace* child);
-		void removeSlaveThread(class SlaveThreadTrace* child);
+		void addSlaveThread(class SlaveThreadRecorder* child);
+		void removeSlaveThread(class SlaveThreadRecorder* child);
 
 		/*virtual */ void pushToMaster();
 
@@ -518,41 +518,41 @@ namespace LLTrace
 		LLMutex* getSlaveListMutex() { return &mSlaveListMutex; }
 
 	private:
-		struct SlaveThreadTraceProxy
+		struct SlaveThreadRecorderProxy
 		{
-			SlaveThreadTraceProxy(class SlaveThreadTrace* trace);
+			SlaveThreadRecorderProxy(class SlaveThreadRecorder* recorder);
 
-			class SlaveThreadTrace*	mSlaveTrace;
-			Sampler					mSamplerStorage;
+			class SlaveThreadRecorder*	mRecorder;
+			Recording					mSlaveRecording;
 		private:
 			//no need to copy these and then have to duplicate the storage
-			SlaveThreadTraceProxy(const SlaveThreadTraceProxy& other) {}
+			SlaveThreadRecorderProxy(const SlaveThreadRecorderProxy& other) {}
 		};
-		typedef std::list<SlaveThreadTraceProxy*> slave_thread_trace_list_t;
+		typedef std::list<SlaveThreadRecorderProxy*> slave_thread_recorder_list_t;
 
-		slave_thread_trace_list_t		mSlaveThreadTraces;
+		slave_thread_recorder_list_t	mSlaveThreadRecorders;
 		LLMutex							mSlaveListMutex;
 	};
 
-	class LL_COMMON_API SlaveThreadTrace : public ThreadTrace
+	class LL_COMMON_API SlaveThreadRecorder : public ThreadRecorder
 	{
 	public:
-		SlaveThreadTrace();
-		~SlaveThreadTrace();
+		SlaveThreadRecorder();
+		~SlaveThreadRecorder();
 
 		// call this periodically to gather stats data for master thread to consume
 		/*virtual*/ void pushToMaster();
 
-		MasterThreadTrace* 	mMaster;
+		MasterThreadRecorder* 	mMaster;
 
 		class SharedData
 		{
 		public:
-			void copyFrom(const Sampler& source);
-			void copyTo(Sampler& sink);
+			void copyFrom(const Recording& source);
+			void copyTo(Recording& sink);
 		private:
-			LLMutex		mSamplerMutex;
-			Sampler		mSampler;
+			LLMutex		mRecorderMutex;
+			Recording	mRecorder;
 		};
 		SharedData		mSharedData;
 	};
diff --git a/indra/llcommon/lltracesampler.cpp b/indra/llcommon/lltracerecording.cpp
index 17e58b96e2..a792d40f9d 100644
--- a/indra/llcommon/lltracesampler.cpp
+++ b/indra/llcommon/lltracerecording.cpp
@@ -25,7 +25,7 @@
 
 #include "linden_common.h"
 
-#include "lltracesampler.h"
+#include "lltracerecording.h"
 #include "lltrace.h"
 #include "llthread.h"
 
@@ -33,10 +33,10 @@ namespace LLTrace
 {
 
 ///////////////////////////////////////////////////////////////////////
-// Sampler
+// Recording
 ///////////////////////////////////////////////////////////////////////
 
-Sampler::Sampler() 
+Recording::Recording() 
 :	mElapsedSeconds(0),
 	mIsStarted(false),
 	mRatesStart(new AccumulatorBuffer<RateAccumulator<F32> >()),
@@ -47,17 +47,17 @@ Sampler::Sampler()
 {
 }
 
-Sampler::~Sampler()
+Recording::~Recording()
 {
 }
 
-void Sampler::start()
+void Recording::start()
 {
 	reset();
 	resume();
 }
 
-void Sampler::reset()
+void Recording::reset()
 {
 	mRates.write()->reset();
 	mMeasurements.write()->reset();
@@ -67,54 +67,54 @@ void Sampler::reset()
 	mSamplingTimer.reset();
 }
 
-void Sampler::resume()
+void Recording::resume()
 {
 	if (!mIsStarted)
 	{
 		mSamplingTimer.reset();
-		LLTrace::get_thread_trace()->activate(this);
+		LLTrace::get_thread_recorder()->activate(this);
 		mIsStarted = true;
 	}
 }
 
-void Sampler::stop()
+void Recording::stop()
 {
 	if (mIsStarted)
 	{
 		mElapsedSeconds += mSamplingTimer.getElapsedTimeF64();
-		LLTrace::get_thread_trace()->deactivate(this);
+		LLTrace::get_thread_recorder()->deactivate(this);
 		mIsStarted = false;
 	}
 }
 
 
-void Sampler::makePrimary()
+void Recording::makePrimary()
 {
 	mRates.write()->makePrimary();
 	mMeasurements.write()->makePrimary();
 	mStackTimers.write()->makePrimary();
 }
 
-bool Sampler::isPrimary()
+bool Recording::isPrimary()
 {
 	return mRates->isPrimary();
 }
 
-void Sampler::mergeSamples( const Sampler& other )
+void Recording::mergeSamples( const Recording& other )
 {
 	mRates.write()->mergeSamples(*other.mRates);
 	mMeasurements.write()->mergeSamples(*other.mMeasurements);
 	mStackTimers.write()->mergeSamples(*other.mStackTimers);
 }
 
-void Sampler::initDeltas( const Sampler& other )
+void Recording::initDeltas( const Recording& other )
 {
 	mRatesStart.write()->copyFrom(*other.mRates);
 	mStackTimersStart.write()->copyFrom(*other.mStackTimers);
 }
 
 
-void Sampler::mergeDeltas( const Sampler& other )
+void Recording::mergeDeltas( const Recording& other )
 {
 	mRates.write()->mergeDeltas(*mRatesStart, *other.mRates);
 	mStackTimers.write()->mergeDeltas(*mStackTimersStart, *other.mStackTimers);
@@ -122,38 +122,38 @@ void Sampler::mergeDeltas( const Sampler& other )
 }
 
 
-F32 Sampler::getSum( Rate<F32>& stat )
+F32 Recording::getSum( Rate<F32>& stat )
 {
 	return stat.getAccumulator(mRates).getSum();
 }
 
-F32 Sampler::getSum( Measurement<F32>& stat )
+F32 Recording::getSum( Measurement<F32>& stat )
 {
 	return stat.getAccumulator(mMeasurements).getSum();
 }
 
 
-F32 Sampler::getPerSec( Rate<F32>& stat )
+F32 Recording::getPerSec( Rate<F32>& stat )
 {
 	return stat.getAccumulator(mRates).getSum() / mElapsedSeconds;
 }
 
-F32 Sampler::getMin( Measurement<F32>& stat )
+F32 Recording::getMin( Measurement<F32>& stat )
 {
 	return stat.getAccumulator(mMeasurements).getMin();
 }
 
-F32 Sampler::getMax( Measurement<F32>& stat )
+F32 Recording::getMax( Measurement<F32>& stat )
 {
 	return stat.getAccumulator(mMeasurements).getMax();
 }
 
-F32 Sampler::getMean( Measurement<F32>& stat )
+F32 Recording::getMean( Measurement<F32>& stat )
 {
 	return stat.getAccumulator(mMeasurements).getMean();
 }
 
-F32 Sampler::getStandardDeviation( Measurement<F32>& stat )
+F32 Recording::getStandardDeviation( Measurement<F32>& stat )
 {
 	return stat.getAccumulator(mMeasurements).getStandardDeviation();
 }
diff --git a/indra/llcommon/lltracesampler.h b/indra/llcommon/lltracerecording.h
index e3498fb39f..83dc503ea6 100644
--- a/indra/llcommon/lltracesampler.h
+++ b/indra/llcommon/lltracerecording.h
@@ -1,5 +1,5 @@
 /** 
- * @file lltracesampler.h
+ * @file lltracerecording.h
  * @brief Sampling object for collecting runtime statistics originating from lltrace.
  *
  * $LicenseInfo:firstyear=2001&license=viewerlgpl$
@@ -24,8 +24,8 @@
  * $/LicenseInfo$
  */
 
-#ifndef LL_LLTRACESAMPLER_H
-#define LL_LLTRACESAMPLER_H
+#ifndef LL_LLTRACERECORDING_H
+#define LL_LLTRACERECORDING_H
 
 #include "stdtypes.h"
 #include "llpreprocessor.h"
@@ -42,12 +42,12 @@ namespace LLTrace
 	template<typename T> class MeasurementAccumulator;
 	class TimerAccumulator;
 
-	class LL_COMMON_API Sampler
+	class LL_COMMON_API Recording
 	{
 	public:
-		Sampler();
+		Recording();
 
-		~Sampler();
+		~Recording();
 
 		void makePrimary();
 		bool isPrimary();
@@ -56,9 +56,9 @@ namespace LLTrace
 		void stop();
 		void resume();
 
-		void mergeSamples(const Sampler& other);
-		void initDeltas(const Sampler& other);
-		void mergeDeltas(const Sampler& other);
+		void mergeSamples(const Recording& other);
+		void initDeltas(const Recording& other);
+		void mergeDeltas(const Recording& other);
 
 		void reset();
 
@@ -76,9 +76,9 @@ namespace LLTrace
 		F64 getSampleTime() { return mElapsedSeconds; }
 
 	private:
-		friend class ThreadTrace;
+		friend class ThreadRecorder;
 		// returns data for current thread
-		class ThreadTrace* getThreadTrace(); 
+		class ThreadRecorder* getThreadRecorder(); 
 
 		LLCopyOnWritePointer<AccumulatorBuffer<RateAccumulator<F32> > >			mRatesStart;
 		LLCopyOnWritePointer<AccumulatorBuffer<RateAccumulator<F32> > >			mRates;
@@ -91,10 +91,10 @@ namespace LLTrace
 		F64				mElapsedSeconds;
 	};
 
-	class LL_COMMON_API PeriodicSampler
+	class LL_COMMON_API PeriodicRecording
 	{
 
 	};
 }
 
-#endif // LL_LLTRACESAMPLER_H
+#endif // LL_LLTRACERECORDING_H
diff --git a/indra/llui/llstatbar.cpp b/indra/llui/llstatbar.cpp
index 1f8be3da62..bc9603804b 100644
--- a/indra/llui/llstatbar.cpp
+++ b/indra/llui/llstatbar.cpp
@@ -36,7 +36,7 @@
 
 #include "llstat.h"
 #include "lluictrlfactory.h"
-#include "lltracesampler.h"
+#include "lltracerecording.h"
 
 ///////////////////////////////////////////////////////////////////////////////////
 
@@ -111,20 +111,20 @@ void LLStatBar::draw()
 	}
 	else if (mFloatStatp)
 	{
-		LLTrace::Sampler* sampler = LLTrace::get_thread_trace()->getPrimarySampler();
+		LLTrace::Recording* recording = LLTrace::get_thread_recorder()->getPrimaryRecording();
 		if (mPerSec)
 		{
-			current = sampler->getSum(*mFloatStatp) / sampler->getSampleTime();
-			//min = sampler->getMin(*mFloatStatp) / sampler->getSampleTime();
-			//max = sampler->getMax(*mFloatStatp) / sampler->getSampleTime();
-			//mean = sampler->getMean(*mFloatStatp) / sampler->getSampleTime();
+			current = recording->getSum(*mFloatStatp) / recording->getSampleTime();
+			//min = recording->getMin(*mFloatStatp) / recording->getSampleTime();
+			//max = recording->getMax(*mFloatStatp) / recording->getSampleTime();
+			//mean = recording->getMean(*mFloatStatp) / recording->getSampleTime();
 		}
 		else
 		{
-			current = sampler->getSum(*mFloatStatp);
-			//min = sampler->getMin(*mFloatStatp);
-			//max = sampler->getMax(*mFloatStatp);
-			//mean = sampler->getMean(*mFloatStatp);
+			current = recording->getSum(*mFloatStatp);
+			//min = recording->getMin(*mFloatStatp);
+			//max = recording->getMax(*mFloatStatp);
+			//mean = recording->getMean(*mFloatStatp);
 		}
 	}
 	
diff --git a/indra/llui/llstatgraph.cpp b/indra/llui/llstatgraph.cpp
index e0d7623999..aed9e4ec93 100644
--- a/indra/llui/llstatgraph.cpp
+++ b/indra/llui/llstatgraph.cpp
@@ -35,7 +35,7 @@
 #include "llstat.h"
 #include "llgl.h"
 #include "llglheaders.h"
-#include "lltracesampler.h"
+#include "lltracerecording.h"
 //#include "llviewercontrol.h"
 
 ///////////////////////////////////////////////////////////////////////////////////
@@ -85,15 +85,15 @@ void LLStatGraph::draw()
 	}
 	else if (mF32Statp)
 	{
-		LLTrace::Sampler* sampler = LLTrace::get_thread_trace()->getPrimarySampler();
+		LLTrace::Recording* recording = LLTrace::get_thread_recorder()->getPrimaryRecording();
 
 		if (mPerSec)
 		{
-			mValue = sampler->getSum(*mF32Statp) / sampler->getSampleTime();
+			mValue = recording->getSum(*mF32Statp) / recording->getSampleTime();
 		}
 		else
 		{
-			mValue = sampler->getSum(*mF32Statp);
+			mValue = recording->getSum(*mF32Statp);
 		}
 
 	}
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 0bb87dfa6c..22f3cce9e8 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -1222,7 +1222,7 @@ bool LLAppViewer::mainLoop()
 	{
 		LLFastTimer _(FTM_FRAME);
 		LLFastTimer::nextFrame(); 
-		LLTrace::getMasterThreadTrace().pullFromSlaveThreads();
+		LLTrace::getMasterThreadRecorder().pullFromSlaveThreads();
 
 		//clear call stack records
 		llclearcallstacks;
diff --git a/indra/newview/llviewerstats.cpp b/indra/newview/llviewerstats.cpp
index e2b09a1902..a6e9643edd 100755
--- a/indra/newview/llviewerstats.cpp
+++ b/indra/newview/llviewerstats.cpp
@@ -276,12 +276,11 @@ LLViewerStats::LLViewerStats() :
 	}	
 	
 	mAgentPositionSnaps.reset();
-	mSampler->start();
+	mRecording.start();
 }
 
 LLViewerStats::~LLViewerStats()
 {
-	delete mSampler;
 }
 
 void LLViewerStats::resetStats()
diff --git a/indra/newview/llviewerstats.h b/indra/newview/llviewerstats.h
index 9e809dd08c..ca5f6c6821 100755
--- a/indra/newview/llviewerstats.h
+++ b/indra/newview/llviewerstats.h
@@ -29,7 +29,8 @@
 
 #include "llstat.h"
 #include "lltextureinfo.h"
-#include "lltracesampler.h"
+#include "lltracerecording.h"
+#include "lltrace.h"
 
 extern LLTrace::Rate<F32>	STAT_KBIT,
 							STAT_LAYERS_KBIT,
@@ -297,11 +298,11 @@ public:
 		static void recordPhaseStat(const std::string& phase_name, F32 value);
 	};
 
-	LLTrace::Sampler* getSampler() { return mSampler; }
+	LLTrace::Recording& getRecording() { return mRecording; }
 
 private:
 	F64	mStats[ST_COUNT];
-	LLTrace::Sampler*	mSampler;
+	LLTrace::Recording	mRecording;
 
 	F64 mLastTimeDiff;  // used for time stat updates
 };
diff --git a/indra/newview/llviewertexturelist.cpp b/indra/newview/llviewertexturelist.cpp
index 21a83b1676..4e62cbd714 100644
--- a/indra/newview/llviewertexturelist.cpp
+++ b/indra/newview/llviewertexturelist.cpp
@@ -622,9 +622,9 @@ void LLViewerTextureList::updateImages(F32 max_time)
 	}
 	cleared = FALSE;
 
-	LLTrace::Sampler* sampler = LLTrace::getThreadTrace()->getPrimarySampler();
+	LLTrace::Recording* recording = LLTrace::get_thread_recorder()->getPrimaryRecording();
 
-	LLAppViewer::getTextureFetch()->setTextureBandwidth(sampler->getMean(STAT_TEXTURE_KBIT) / sampler->getSampleTime());
+	LLAppViewer::getTextureFetch()->setTextureBandwidth(recording->getPerSec(STAT_TEXTURE_KBIT));
 
 	LLViewerStats::getInstance()->mNumImagesStat.addValue(sNumImages);
 	LLViewerStats::getInstance()->mNumRawImagesStat.addValue(LLImageRaw::sRawImageCount);