SH-4433 WIP: Interesting: Statistics > Ping Sim is always 0 ms

converted many values over to units system in effort to track down
source of 0 ping

31 files changed, 294 insertions, 294 deletions

diff --git a/indra/llcommon/llmemory.cpp b/indra/llcommon/llmemory.cpp
index a9256124f2..c59b61471a 100755
--- a/indra/llcommon/llmemory.cpp
+++ b/indra/llcommon/llmemory.cpp
@@ -47,11 +47,11 @@
 
 //static
 char* LLMemory::reserveMem = 0;
-U32 LLMemory::sAvailPhysicalMemInKB = U32_MAX ;
-U32 LLMemory::sMaxPhysicalMemInKB = 0;
-U32 LLMemory::sAllocatedMemInKB = 0;
-U32 LLMemory::sAllocatedPageSizeInKB = 0 ;
-U32 LLMemory::sMaxHeapSizeInKB = U32_MAX ;
+U32Kibibytes LLMemory::sAvailPhysicalMemInKB(U32_MAX);
+U32Kibibytes LLMemory::sMaxPhysicalMemInKB(0);
+U32Kibibytes LLMemory::sAllocatedMemInKB(0);
+U32Kibibytes LLMemory::sAllocatedPageSizeInKB(0);
+U32Kibibytes LLMemory::sMaxHeapSizeInKB(U32_MAX);
 BOOL LLMemory::sEnableMemoryFailurePrevention = FALSE;
 
 #if __DEBUG_PRIVATE_MEM__
@@ -116,7 +116,7 @@ void LLMemory::updateMemoryInfo()
 	sAllocatedMemInKB = (U32)(counters.WorkingSetSize / 1024) ;
 	sAllocatedPageSizeInKB = (U32)(counters.PagefileUsage / 1024) ;
 
-	U32 avail_phys, avail_virtual;
+	U32Kibibytes avail_phys, avail_virtual;
 	LLMemoryInfo::getAvailableMemoryKB(avail_phys, avail_virtual) ;
 	sMaxPhysicalMemInKB = llmin(avail_phys + sAllocatedMemInKB, sMaxHeapSizeInKB);
 
@@ -232,19 +232,19 @@ bool LLMemory::isMemoryPoolLow()
 }
 
 //static 
-U32 LLMemory::getAvailableMemKB() 
+U32Kibibytes LLMemory::getAvailableMemKB() 
 {
 	return sAvailPhysicalMemInKB ;
 }
 
 //static 
-U32 LLMemory::getMaxMemKB() 
+U32Kibibytes LLMemory::getMaxMemKB() 
 {
 	return sMaxPhysicalMemInKB ;
 }
 
 //static 
-U32 LLMemory::getAllocatedMemKB() 
+U32Kibibytes LLMemory::getAllocatedMemKB() 
 {
 	return sAllocatedMemInKB ;
 }
diff --git a/indra/llcommon/llmemory.h b/indra/llcommon/llmemory.h
index a24d97576f..c45c7ed213 100755
--- a/indra/llcommon/llmemory.h
+++ b/indra/llcommon/llmemory.h
@@ -27,6 +27,7 @@
 #define LLMEMORY_H
 
 #include "linden_common.h"
+#include "llunit.h"
 #if !LL_WINDOWS
 #include <stdint.h>
 #endif
@@ -170,17 +171,17 @@ public:
 	static void logMemoryInfo(BOOL update = FALSE);
 	static bool isMemoryPoolLow();
 
-	static U32 getAvailableMemKB() ;
-	static U32 getMaxMemKB() ;
-	static U32 getAllocatedMemKB() ;
+	static U32Kibibytes getAvailableMemKB() ;
+	static U32Kibibytes getMaxMemKB() ;
+	static U32Kibibytes getAllocatedMemKB() ;
 private:
 	static char* reserveMem;
-	static U32 sAvailPhysicalMemInKB ;
-	static U32 sMaxPhysicalMemInKB ;
-	static U32 sAllocatedMemInKB;
-	static U32 sAllocatedPageSizeInKB ;
+	static U32Kibibytes sAvailPhysicalMemInKB ;
+	static U32Kibibytes sMaxPhysicalMemInKB ;
+	static U32Kibibytes sAllocatedMemInKB;
+	static U32Kibibytes sAllocatedPageSizeInKB ;
 
-	static U32 sMaxHeapSizeInKB;
+	static U32Kibibytes sMaxHeapSizeInKB;
 	static BOOL sEnableMemoryFailurePrevention;
 };
 
diff --git a/indra/llcommon/llsys.cpp b/indra/llcommon/llsys.cpp
index cad02f491a..8f7e60fb68 100755
--- a/indra/llcommon/llsys.cpp
+++ b/indra/llcommon/llsys.cpp
@@ -832,7 +832,7 @@ LLMemoryInfo::LLMemoryInfo()
 }
 
 #if LL_WINDOWS
-static U32 LLMemoryAdjustKBResult(U32 inKB)
+static U32Kibibytes LLMemoryAdjustKBResult(U32Kibibytes inKB)
 {
 	// Moved this here from llfloaterabout.cpp
 
@@ -843,16 +843,16 @@ static U32 LLMemoryAdjustKBResult(U32 inKB)
 	// returned from the GetMemoryStatusEx function.  Here we keep the
 	// original adjustment from llfoaterabout.cpp until this can be
 	// fixed somehow.
-	inKB += 1024;
+	inKB += U32Mibibytes(1);
 
 	return inKB;
 }
 #endif
 
-U32 LLMemoryInfo::getPhysicalMemoryKB() const
+U32Kibibytes LLMemoryInfo::getPhysicalMemoryKB() const
 {
 #if LL_WINDOWS
-	return LLMemoryAdjustKBResult(mStatsMap["Total Physical KB"].asInteger());
+	return LLMemoryAdjustKBResult(U32Kibibytes(mStatsMap["Total Physical KB"].asInteger()));
 
 #elif LL_DARWIN
 	// This might work on Linux as well.  Someone check...
@@ -862,17 +862,17 @@ U32 LLMemoryInfo::getPhysicalMemoryKB() const
 	size_t len = sizeof(phys);	
 	sysctl(mib, 2, &phys, &len, NULL, 0);
 	
-	return (U32)(phys >> 10);
+	return U32Bytes(phys);
 
 #elif LL_LINUX
 	U64 phys = 0;
 	phys = (U64)(getpagesize()) * (U64)(get_phys_pages());
-	return (U32)(phys >> 10);
+	return U32Bytes(phys);
 
 #elif LL_SOLARIS
 	U64 phys = 0;
 	phys = (U64)(getpagesize()) * (U64)(sysconf(_SC_PHYS_PAGES));
-	return (U32)(phys >> 10);
+	return U32Bytes(phys);
 
 #else
 	return 0;
@@ -880,24 +880,24 @@ U32 LLMemoryInfo::getPhysicalMemoryKB() const
 #endif
 }
 
-U32 LLMemoryInfo::getPhysicalMemoryClamped() const
+U32Bytes LLMemoryInfo::getPhysicalMemoryClamped() const
 {
 	// Return the total physical memory in bytes, but clamp it
 	// to no more than U32_MAX
 	
-	U32 phys_kb = getPhysicalMemoryKB();
+	U32Bytes phys_kb = getPhysicalMemoryKB();
 	if (phys_kb >= 4194304 /* 4GB in KB */)
 	{
-		return U32_MAX;
+		return U32Bytes(U32_MAX);
 	}
 	else
 	{
-		return phys_kb << 10;
+		return phys_kb;
 	}
 }
 
 //static
-void LLMemoryInfo::getAvailableMemoryKB(U32& avail_physical_mem_kb, U32& avail_virtual_mem_kb)
+void LLMemoryInfo::getAvailableMemoryKB(U32Kibibytes& avail_physical_mem_kb, U32Kibibytes& avail_virtual_mem_kb)
 {
 #if LL_WINDOWS
 	// Sigh, this shouldn't be a static method, then we wouldn't have to
diff --git a/indra/llcommon/llsys.h b/indra/llcommon/llsys.h
index aa60fc9b2e..ad4f243d05 100755
--- a/indra/llcommon/llsys.h
+++ b/indra/llcommon/llsys.h
@@ -112,15 +112,15 @@ public:
 	LLMemoryInfo(); ///< Default constructor
 	void stream(std::ostream& s) const;	///< output text info to s
 
-	U32 getPhysicalMemoryKB() const; ///< Memory size in KiloBytes
+	U32Kibibytes getPhysicalMemoryKB() const; 
 	
 	/*! Memory size in bytes, if total memory is >= 4GB then U32_MAX will
 	**  be returned.
 	*/
-	U32 getPhysicalMemoryClamped() const; ///< Memory size in clamped bytes
+	U32Bytes getPhysicalMemoryClamped() const; ///< Memory size in clamped bytes
 
 	//get the available memory infomation in KiloBytes.
-	static void getAvailableMemoryKB(U32& avail_physical_mem_kb, U32& avail_virtual_mem_kb);
+	static void getAvailableMemoryKB(U32Kibibytes& avail_physical_mem_kb, U32Kibibytes& avail_virtual_mem_kb);
 
 	// Retrieve a map of memory statistics. The keys of the map are platform-
 	// dependent. The values are in kilobytes to try to avoid integer overflow.
diff --git a/indra/llmessage/llassetstorage.cpp b/indra/llmessage/llassetstorage.cpp
index fe97501658..413266a29d 100755
--- a/indra/llmessage/llassetstorage.cpp
+++ b/indra/llmessage/llassetstorage.cpp
@@ -194,8 +194,8 @@ LLSD LLAssetRequest::getTerseDetails() const
 	sd["asset_id"] = getUUID();
 	sd["type_long"] = LLAssetType::lookupHumanReadable(getType());
 	sd["type"] = LLAssetType::lookup(getType());
-	sd["time"] = mTime;
-	time_t timestamp = (time_t) mTime;
+	sd["time"] = mTime.value();
+	time_t timestamp = (time_t) mTime.value();
 	std::ostringstream time_string;
 	time_string << ctime(&timestamp);
 	sd["time_string"] = time_string.str();
@@ -341,7 +341,7 @@ void LLAssetStorage::checkForTimeouts()
 
 void LLAssetStorage::_cleanupRequests(BOOL all, S32 error)
 {
-	F64 mt_secs = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds mt_secs = LLMessageSystem::getMessageTimeSeconds();
 
 	request_list_t timed_out;
 	S32 rt;
diff --git a/indra/llmessage/llassetstorage.h b/indra/llmessage/llassetstorage.h
index 6ffd7ad309..6ed1027cee 100755
--- a/indra/llmessage/llassetstorage.h
+++ b/indra/llmessage/llassetstorage.h
@@ -119,8 +119,8 @@ public:
 	BOOL	mIsTemp;
 	BOOL	mIsLocal;
 	BOOL	mIsUserWaiting;		// We don't want to try forever if a user is waiting for a result.
-	F64		mTime;				// Message system time
-	F64		mTimeout;			// Amount of time before timing out.
+	F64Seconds		mTime;				// Message system time
+	F64Seconds		mTimeout;			// Amount of time before timing out.
 	BOOL    mIsPriority;
 	BOOL	mDataSentInFirstPacket;
 	BOOL	mDataIsInVFS;
@@ -163,7 +163,7 @@ public:
 	void	*mUserData;
 	LLHost  mHost;
 	BOOL	mIsTemp;
-	F64		mTime;				// Message system time
+	F64Seconds	mTime;				// Message system time
 	BOOL    mIsPriority;
 	BOOL	mDataSentInFirstPacket;
 	BOOL	mDataIsInVFS;
@@ -193,7 +193,7 @@ public:
 	void	*mUserData;
 	LLHost  mHost;
 	BOOL	mIsTemp;
-	F64		mTime;				// Message system time
+	F64Seconds	mTime;				// Message system time
 	BOOL    mIsPriority;
 	BOOL	mDataSentInFirstPacket;
 	BOOL	mDataIsInVFS;
diff --git a/indra/llmessage/llcircuit.cpp b/indra/llmessage/llcircuit.cpp
index 00e9266d47..1ace4d9b70 100755
--- a/indra/llmessage/llcircuit.cpp
+++ b/indra/llmessage/llcircuit.cpp
@@ -60,12 +60,12 @@
 const S32 PING_START_BLOCK = 3;		// How many pings behind we have to be to consider ourself blocked.
 const S32 PING_RELEASE_BLOCK = 2;	// How many pings behind we have to be to consider ourself unblocked.
 
-const F32 TARGET_PERIOD_LENGTH = 5.f;	// seconds
-const F32 LL_DUPLICATE_SUPPRESSION_TIMEOUT = 60.f; //seconds - this can be long, as time-based cleanup is
+const F32Seconds TARGET_PERIOD_LENGTH(5.f);
+const F32Seconds LL_DUPLICATE_SUPPRESSION_TIMEOUT(60.f); //this can be long, as time-based cleanup is
 													// only done when wrapping packetids, now...
 
 LLCircuitData::LLCircuitData(const LLHost &host, TPACKETID in_id, 
-							 const F32 circuit_heartbeat_interval, const F32 circuit_timeout)
+							 const F32Seconds circuit_heartbeat_interval, const F32Seconds circuit_timeout)
 :	mHost (host),
 	mWrapID(0),
 	mPacketsOutID(0), 
@@ -84,7 +84,7 @@ LLCircuitData::LLCircuitData(const LLHost &host, TPACKETID in_id,
 	mPingsInTransit(0),
 	mLastPingID(0),
 	mPingDelay(INITIAL_PING_VALUE_MSEC), 
-	mPingDelayAveraged((F32)INITIAL_PING_VALUE_MSEC), 
+	mPingDelayAveraged(INITIAL_PING_VALUE_MSEC), 
 	mUnackedPacketCount(0),
 	mUnackedPacketBytes(0),
 	mLastPacketInTime(0.0),
@@ -110,13 +110,13 @@ LLCircuitData::LLCircuitData(const LLHost &host, TPACKETID in_id,
 {
 	// Need to guarantee that this time is up to date, we may be creating a circuit even though we haven't been
 	//  running a message system loop.
-	F64 mt_sec = LLMessageSystem::getMessageTimeSeconds(TRUE);
+	F64Seconds mt_sec = LLMessageSystem::getMessageTimeSeconds(TRUE);
 	F32 distribution_offset = ll_frand();
 	
 	mPingTime = mt_sec;
 	mLastPingSendTime = mt_sec + mHeartbeatInterval * distribution_offset;
 	mLastPingReceivedTime = mt_sec;
-	mNextPingSendTime = mLastPingSendTime + 0.95*mHeartbeatInterval + ll_frand(0.1f*mHeartbeatInterval);
+	mNextPingSendTime = mLastPingSendTime + 0.95*mHeartbeatInterval + F32Seconds(ll_frand(0.1f*mHeartbeatInterval.value()));
 	mPeriodTime = mt_sec;
 
 	mLocalEndPointID.generate();
@@ -268,7 +268,7 @@ void LLCircuitData::ackReliablePacket(TPACKETID packet_num)
 
 
 
-S32 LLCircuitData::resendUnackedPackets(const F64 now)
+S32 LLCircuitData::resendUnackedPackets(const F64Seconds now)
 {
 	S32 resent_packets = 0;
 	LLReliablePacket *packetp;
@@ -355,7 +355,7 @@ S32 LLCircuitData::resendUnackedPackets(const F64 now)
 			// The new method, retry time based on ping
 			if (packetp->mPingBasedRetry)
 			{
-				packetp->mExpirationTime = now + llmax(LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS, (LL_RELIABLE_TIMEOUT_FACTOR * getPingDelayAveraged()));
+				packetp->mExpirationTime = now + llmax(LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS, F32Seconds(LL_RELIABLE_TIMEOUT_FACTOR * getPingDelayAveraged()));
 			}
 			else
 			{
@@ -427,10 +427,11 @@ S32 LLCircuitData::resendUnackedPackets(const F64 now)
 }
 
 
-LLCircuit::LLCircuit(const F32 circuit_heartbeat_interval, const F32 circuit_timeout) : mLastCircuit(NULL),  
-	mHeartbeatInterval(circuit_heartbeat_interval), mHeartbeatTimeout(circuit_timeout)
-{
-}
+LLCircuit::LLCircuit(const F32Seconds circuit_heartbeat_interval, const F32Seconds circuit_timeout) 
+:	mLastCircuit(NULL),  
+	mHeartbeatInterval(circuit_heartbeat_interval), 
+	mHeartbeatTimeout(circuit_timeout)
+{}
 
 LLCircuit::~LLCircuit()
 {
@@ -521,17 +522,17 @@ void LLCircuitData::setAllowTimeout(BOOL allow)
 // Reset per-period counters if necessary.
 void LLCircuitData::checkPeriodTime()
 {
-	F64 mt_sec = LLMessageSystem::getMessageTimeSeconds();
-	F64 period_length = mt_sec - mPeriodTime;
+	F64Seconds mt_sec = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds period_length = mt_sec - mPeriodTime;
 	if ( period_length > TARGET_PERIOD_LENGTH)
 	{
-		F32 bps_in = (F32)(mBytesInThisPeriod * 8.f / period_length);
+		F32 bps_in = F32Bits(mBytesInThisPeriod).value() / period_length.value();
 		if (bps_in > mPeakBPSIn)
 		{
 			mPeakBPSIn = bps_in;
 		}
 
-		F32 bps_out = (F32)(mBytesOutThisPeriod * 8.f / period_length);
+		F32 bps_out = F32Bits(mBytesOutThisPeriod).value() / period_length.value();
 		if (bps_out > mPeakBPSOut)
 		{
 			mPeakBPSOut = bps_out;
@@ -541,7 +542,7 @@ void LLCircuitData::checkPeriodTime()
 		mBytesOutLastPeriod	= mBytesOutThisPeriod;
 		mBytesInThisPeriod	= 0;
 		mBytesOutThisPeriod	= 0;
-		mLastPeriodLength	= (F32)period_length;
+		mLastPeriodLength	= period_length;
 
 		mPeriodTime = mt_sec;
 	}
@@ -584,7 +585,7 @@ void LLCircuitData::addReliablePacket(S32 mSocket, U8 *buf_ptr, S32 buf_len, LLR
 
 void LLCircuit::resendUnackedPackets(S32& unacked_list_length, S32& unacked_list_size)
 {
-	F64 now = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds now = LLMessageSystem::getMessageTimeSeconds();
 	unacked_list_length = 0;
 	unacked_list_size = 0;
 
@@ -726,7 +727,7 @@ void LLCircuitData::checkPacketInID(TPACKETID id, BOOL receive_resent)
 		}
 		else if (!receive_resent) // don't freak out over out-of-order reliable resends
 		{
-			U64 time = LLMessageSystem::getMessageTimeUsecs();
+			U64Microseconds time = LLMessageSystem::getMessageTimeUsecs();
 			TPACKETID index = mPacketsInID;
 			S32 gap_count = 0;
 			if ((index < id) && ((id - index) < 16))
@@ -742,7 +743,7 @@ void LLCircuitData::checkPacketInID(TPACKETID id, BOOL receive_resent)
 					}
 
 //						LL_INFOS() << "adding potential lost: " << index << LL_ENDL;
-					mPotentialLostPackets[index] = time;
+					mPotentialLostPackets[index] = time.value();
 					index++;
 					index = index % LL_MAX_OUT_PACKET_ID;
 					gap_count++;
@@ -780,7 +781,7 @@ void LLCircuitData::checkPacketInID(TPACKETID id, BOOL receive_resent)
 
 void LLCircuit::updateWatchDogTimers(LLMessageSystem *msgsys)
 {
-	F64 cur_time = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds cur_time = LLMessageSystem::getMessageTimeSeconds();
 	S32 count = mPingSet.size();
 	S32 cur = 0;
 
@@ -818,7 +819,7 @@ void LLCircuit::updateWatchDogTimers(LLMessageSystem *msgsys)
 			if (cdp->updateWatchDogTimers(msgsys))
             {
 				// Randomize our pings a bit by doing some up to 5% early or late
-				F64 dt = 0.95f*mHeartbeatInterval + ll_frand(0.1f*mHeartbeatInterval);
+				F64Seconds dt = 0.95f*mHeartbeatInterval + F32Seconds(ll_frand(0.1f*mHeartbeatInterval.value()));
 
 				// Remove it, and reinsert it with the new next ping time.
 				// Always remove before changing the sorting key.
@@ -846,7 +847,7 @@ void LLCircuit::updateWatchDogTimers(LLMessageSystem *msgsys)
 
 BOOL LLCircuitData::updateWatchDogTimers(LLMessageSystem *msgsys)
 {
-	F64 cur_time = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds cur_time = LLMessageSystem::getMessageTimeSeconds();
 	mLastPingSendTime = cur_time;
 
 	if (!checkCircuitTimeout())
@@ -963,12 +964,12 @@ BOOL LLCircuitData::updateWatchDogTimers(LLMessageSystem *msgsys)
 	// be considered lost
 
 	LLCircuitData::packet_time_map::iterator it;
-	U64 timeout = (U64)(1000000.0*llmin(LL_MAX_LOST_TIMEOUT, getPingDelayAveraged() * LL_LOST_TIMEOUT_FACTOR));
+	U64Microseconds timeout = llmin(LL_MAX_LOST_TIMEOUT, F32Seconds(getPingDelayAveraged()) * LL_LOST_TIMEOUT_FACTOR);
 
-	U64 mt_usec = LLMessageSystem::getMessageTimeUsecs();
+	U64Microseconds mt_usec = LLMessageSystem::getMessageTimeUsecs();
 	for (it = mPotentialLostPackets.begin(); it != mPotentialLostPackets.end(); )
 	{
-		U64 delta_t_usec = mt_usec - (*it).second;
+		U64Microseconds delta_t_usec = mt_usec - (*it).second;
 		if (delta_t_usec > timeout)
 		{
 			// let's call this one a loss!
@@ -1014,7 +1015,7 @@ void LLCircuitData::clearDuplicateList(TPACKETID oldest_id)
 	// Do timeout checks on everything with an ID > mHighestPacketID.
 	// This should be empty except for wrapping IDs.  Thus, this should be
 	// highly rare.
-	U64 mt_usec = LLMessageSystem::getMessageTimeUsecs();
+	U64Microseconds mt_usec = LLMessageSystem::getMessageTimeUsecs();
 
 	packet_time_map::iterator pit;
 	for(pit = mRecentlyReceivedReliablePackets.upper_bound(mHighestPacketID);
@@ -1025,8 +1026,8 @@ void LLCircuitData::clearDuplicateList(TPACKETID oldest_id)
 		{
 			LL_WARNS() << "Probably incorrectly timing out non-wrapped packets!" << LL_ENDL;
 		}
-		U64 delta_t_usec = mt_usec - (*pit).second;
-		F64 delta_t_sec = delta_t_usec * SEC_PER_USEC;
+		U64Microseconds delta_t_usec = mt_usec - (*pit).second;
+		F64Seconds delta_t_sec = delta_t_usec;
 		if (delta_t_sec > LL_DUPLICATE_SUPPRESSION_TIMEOUT)
 		{
 			// enough time has elapsed we're not likely to get a duplicate on this one
@@ -1043,7 +1044,7 @@ void LLCircuitData::clearDuplicateList(TPACKETID oldest_id)
 
 BOOL LLCircuitData::checkCircuitTimeout()
 {
-	F64 time_since_last_ping = LLMessageSystem::getMessageTimeSeconds() - mLastPingReceivedTime;
+	F64Seconds time_since_last_ping = LLMessageSystem::getMessageTimeSeconds() - mLastPingReceivedTime;
 
 	// Nota Bene: This needs to be turned off if you are debugging multiple simulators
 	if (time_since_last_ping > mHeartbeatTimeout)
@@ -1139,40 +1140,40 @@ std::ostream& operator<<(std::ostream& s, LLCircuitData& circuit)
 	F32 age = circuit.mExistenceTimer.getElapsedTimeF32();
 
 	using namespace std;
-	s << "Circuit " << circuit.mHost << " ";
-	s << circuit.mRemoteID << " ";
-	s << (circuit.mbAlive ? "Alive" : "Not Alive") << " ";
-	s << (circuit.mbAllowTimeout ? "Timeout Allowed" : "Timeout Not Allowed");
-	s << endl;
-
-	s << " Packets Lost: " << circuit.mPacketsLost;
-	s << " Measured Ping: " << circuit.mPingDelay;
-	s << " Averaged Ping: " << circuit.mPingDelayAveraged;
-	s << endl;
-
-	s << "Global In/Out " << S32(age) << " sec";
-	s << " KBytes: " << circuit.mBytesIn / 1024 << "/" << circuit.mBytesOut / 1024;
-	s << " Kbps: ";
-	s << S32(circuit.mBytesIn * 8.f / circuit.mExistenceTimer.getElapsedTimeF32() / 1024.f);
-	s << "/";
-	s << S32(circuit.mBytesOut * 8.f / circuit.mExistenceTimer.getElapsedTimeF32() / 1024.f);
-	s << " Packets: " << circuit.mPacketsIn << "/" << circuit.mPacketsOut;
-	s << endl;
-
-	s << "Recent In/Out   " << S32(circuit.mLastPeriodLength) << " sec";
-	s << " KBytes: ";
-	s << circuit.mBytesInLastPeriod / 1024;
-	s << "/";
-	s << circuit.mBytesOutLastPeriod / 1024;
-	s << " Kbps: ";
-	s << S32(circuit.mBytesInLastPeriod * 8.f / circuit.mLastPeriodLength / 1024.f);
-	s << "/";
-	s << S32(circuit.mBytesOutLastPeriod * 8.f / circuit.mLastPeriodLength / 1024.f);
-	s << " Peak kbps: ";
-	s << S32(circuit.mPeakBPSIn / 1024.f);
-	s << "/";
-	s << S32(circuit.mPeakBPSOut / 1024.f);
-	s << endl;
+	s << "Circuit " << circuit.mHost << " "
+		<< circuit.mRemoteID << " "
+		<< (circuit.mbAlive ? "Alive" : "Not Alive") << " "
+		<< (circuit.mbAllowTimeout ? "Timeout Allowed" : "Timeout Not Allowed")
+		<< endl;
+
+	s << " Packets Lost: " << circuit.mPacketsLost
+		<< " Measured Ping: " << circuit.mPingDelay
+		<< " Averaged Ping: " << circuit.mPingDelayAveraged
+		<< endl;
+
+	s << "Global In/Out " << S32(age) << " sec"
+		<< " KBytes: " << circuit.mBytesIn.valueInUnits<LLUnits::Kibibytes>() << "/" << circuit.mBytesOut.valueInUnits<LLUnits::Kibibytes>()
+		<< " Kbps: "
+		<< S32(circuit.mBytesIn.valueInUnits<LLUnits::Kibibits>() / circuit.mExistenceTimer.getElapsedTimeF32().value())
+		<< "/"
+		<< S32(circuit.mBytesOut.valueInUnits<LLUnits::Kibibits>() / circuit.mExistenceTimer.getElapsedTimeF32().value())
+		<< " Packets: " << circuit.mPacketsIn << "/" << circuit.mPacketsOut
+		<< endl;
+
+	s << "Recent In/Out   " << circuit.mLastPeriodLength
+		<< " KBytes: "
+		<< circuit.mBytesInLastPeriod.valueInUnits<LLUnits::Kibibytes>()
+		<< "/"
+		<< circuit.mBytesOutLastPeriod.valueInUnits<LLUnits::Kibibytes>()
+		<< " Kbps: "
+		<< (S32)(circuit.mBytesInLastPeriod.valueInUnits<LLUnits::Kibibits>() / circuit.mLastPeriodLength.value())
+		<< "/"
+		<< (S32)(circuit.mBytesOutLastPeriod.valueInUnits<LLUnits::Kibibits>() / circuit.mLastPeriodLength.value())
+		<< " Peak kbps: "
+		<< S32(circuit.mPeakBPSIn / 1024.f)
+		<< "/"
+		<< S32(circuit.mPeakBPSOut / 1024.f)
+		<< endl;
 
 	return s;
 }
@@ -1256,10 +1257,10 @@ void LLCircuitData::setPacketInID(TPACKETID id)
 
 void LLCircuitData::pingTimerStop(const U8 ping_id)
 {
-	F64 mt_secs = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds mt_secs = LLMessageSystem::getMessageTimeSeconds();
 
 	// Nota Bene: no averaging of ping times until we get a feel for how this works
-	F64 time = mt_secs - mPingTime;
+	F64Seconds time = mt_secs - mPingTime;
 	if (time == 0.0)
 	{
 		// Ack, we got our ping response on the same frame! Sigh, let's get a real time otherwise
@@ -1276,7 +1277,7 @@ void LLCircuitData::pingTimerStop(const U8 ping_id)
 		delta_ping += 256;
 	}
 
-	U32 msec = (U32) ((delta_ping*mHeartbeatInterval  + time) * 1000.f);
+	U32Milliseconds msec = delta_ping*mHeartbeatInterval + time;
 	setPingDelay(msec);
 
 	mPingsInTransit = delta_ping;
@@ -1305,13 +1306,13 @@ U32 LLCircuitData::getPacketsIn() const
 }
 
 
-S32 LLCircuitData::getBytesIn() const
+S32Bytes LLCircuitData::getBytesIn() const
 {
 	return mBytesIn;
 }
 
 
-S32 LLCircuitData::getBytesOut() const
+S32Bytes LLCircuitData::getBytesOut() const
 {
 	return mBytesOut;
 }
@@ -1353,41 +1354,41 @@ BOOL LLCircuitData::getAllowTimeout() const
 }
 
 
-U32 LLCircuitData::getPingDelay() const
+U32Milliseconds LLCircuitData::getPingDelay() const
 {
 	return mPingDelay;
 }
 
 
-F32 LLCircuitData::getPingInTransitTime()
+F32Milliseconds LLCircuitData::getPingInTransitTime()
 {
 	// This may be inaccurate in the case of a circuit that was "dead" and then revived,
 	// but only until the first round trip ping is sent - djs
-	F32 time_since_ping_was_sent = 0;
+	F32Milliseconds time_since_ping_was_sent(0);
 
 	if (mPingsInTransit)
 	{
-		time_since_ping_was_sent =  (F32)((mPingsInTransit*mHeartbeatInterval - 1) 
-			+ (LLMessageSystem::getMessageTimeSeconds() - mPingTime))*1000.f;
+		time_since_ping_was_sent =  ((mPingsInTransit*mHeartbeatInterval - 1) 
+			+ (LLMessageSystem::getMessageTimeSeconds() - mPingTime));
 	}
 
 	return time_since_ping_was_sent;
 }
 
 
-void LLCircuitData::setPingDelay(U32 ping)
+void LLCircuitData::setPingDelay(U32Milliseconds ping)
 {
 	mPingDelay = ping;
-	mPingDelayAveraged = llmax((F32)ping, getPingDelayAveraged());
+	mPingDelayAveraged = llmax((F32Milliseconds)ping, getPingDelayAveraged());
 	mPingDelayAveraged = ((1.f - LL_AVERAGED_PING_ALPHA) * mPingDelayAveraged) 
-						  + (LL_AVERAGED_PING_ALPHA * (F32) ping);
+						  + (LL_AVERAGED_PING_ALPHA * (F32Milliseconds) ping);
 	mPingDelayAveraged = llclamp(mPingDelayAveraged, 
 								 LL_AVERAGED_PING_MIN,
 								 LL_AVERAGED_PING_MAX);
 }
 
 
-F32 LLCircuitData::getPingDelayAveraged()
+F32Milliseconds LLCircuitData::getPingDelayAveraged()
 {
 	return llmin(llmax(getPingInTransitTime(), mPingDelayAveraged), LL_AVERAGED_PING_MAX);
 }
diff --git a/indra/llmessage/llcircuit.h b/indra/llmessage/llcircuit.h
index 11d4e1b11c..bc29805859 100755
--- a/indra/llmessage/llcircuit.h
+++ b/indra/llmessage/llcircuit.h
@@ -44,10 +44,10 @@
 // Constants
 //
 const F32 LL_AVERAGED_PING_ALPHA = 0.2f;  // relaxation constant on ping running average
-const F32 LL_AVERAGED_PING_MAX = 2000;    // msec
-const F32 LL_AVERAGED_PING_MIN =  100;    // msec  // IW: increased to avoid retransmits when a process is slow
+const F32Milliseconds LL_AVERAGED_PING_MAX(2000);    
+const F32Milliseconds LL_AVERAGED_PING_MIN(100);    // increased to avoid retransmits when a process is slow
 
-const U32 INITIAL_PING_VALUE_MSEC = 1000; // initial value for the ping delay, or for ping delay for an unknown circuit
+const U32Milliseconds INITIAL_PING_VALUE_MSEC(1000); // initial value for the ping delay, or for ping delay for an unknown circuit
 
 const TPACKETID LL_MAX_OUT_PACKET_ID = 0x01000000;
 const int LL_ERR_CIRCUIT_GONE   = -23017;
@@ -77,10 +77,10 @@ class LLCircuitData
 {
 public:
 	LLCircuitData(const LLHost &host, TPACKETID in_id, 
-				  const F32 circuit_heartbeat_interval, const F32 circuit_timeout);
+				  const F32Seconds circuit_heartbeat_interval, const F32Seconds circuit_timeout);
 	~LLCircuitData();
 
-	S32		resendUnackedPackets(const F64 now);
+	S32		resendUnackedPackets(const F64Seconds now);
 	void	clearDuplicateList(TPACKETID oldest_id);
 
 
@@ -106,18 +106,18 @@ public:
 	// mLocalEndPointID should only ever be setup in the LLCircuitData constructor
 	const		LLUUID& getLocalEndPointID() const { return mLocalEndPointID; }
 
-	U32		getPingDelay() const;
+	U32Milliseconds	getPingDelay() const;
 	S32				getPingsInTransit() const			{ return mPingsInTransit; }
 
 	// ACCESSORS
 	BOOL		isAlive() const;
 	BOOL		isBlocked() const;
 	BOOL		getAllowTimeout() const;
-	F32			getPingDelayAveraged();
-	F32			getPingInTransitTime();
+	F32Milliseconds	getPingDelayAveraged();
+	F32Milliseconds	getPingInTransitTime();
 	U32			getPacketsIn() const;
-	S32			getBytesIn() const;
-	S32			getBytesOut() const;
+	S32Bytes	getBytesIn() const;
+	S32Bytes	getBytesOut() const;
 	U32			getPacketsOut() const;
 	U32			getPacketsLost() const;
 	TPACKETID	getPacketOutID() const;
@@ -125,10 +125,10 @@ public:
 	F32			getAgeInSeconds() const;
 	S32			getUnackedPacketCount() const	{ return mUnackedPacketCount; }
 	S32			getUnackedPacketBytes() const	{ return mUnackedPacketBytes; }
-	F64         getNextPingSendTime() const { return mNextPingSendTime; }
+	F64Seconds  getNextPingSendTime() const { return mNextPingSendTime; }
     U32         getLastPacketGap() const { return mLastPacketGap; }
     LLHost      getHost() const { return mHost; }
-	F64			getLastPacketInTime() const		{ return mLastPacketInTime;	}
+	F64Seconds	getLastPacketInTime() const		{ return mLastPacketInTime;	}
 
 	LLThrottleGroup &getThrottleGroup()		{	return mThrottles; }
 
@@ -164,7 +164,7 @@ protected:
 	TPACKETID		nextPacketOutID();
 	void				setPacketInID(TPACKETID id);
 	void					checkPacketInID(TPACKETID id, BOOL receive_resent);
-	void			setPingDelay(U32 ping);
+	void			setPingDelay(U32Milliseconds ping);
 	BOOL			checkCircuitTimeout();	// Return FALSE if the circuit is dead and should be cleaned up
 
 	void			addBytesIn(S32 bytes);
@@ -219,20 +219,20 @@ protected:
 	BOOL	mBlocked;					// Blocked is true if the circuit is hosed, i.e. far behind on pings
 
 	// Not sure what the difference between this and mLastPingSendTime is
-	F64		mPingTime;					// Time at which a ping was sent.
+	F64Seconds	mPingTime;					// Time at which a ping was sent.
 
-	F64		mLastPingSendTime;			// Time we last sent a ping
-	F64		mLastPingReceivedTime;		// Time we last received a ping
-	F64     mNextPingSendTime;          // Time to try and send the next ping
-	S32		mPingsInTransit;			// Number of pings in transit
-	U8		mLastPingID;				// ID of the last ping that we sent out
+	F64Seconds	mLastPingSendTime;			// Time we last sent a ping
+	F64Seconds	mLastPingReceivedTime;		// Time we last received a ping
+	F64Seconds  mNextPingSendTime;          // Time to try and send the next ping
+	S32			mPingsInTransit;			// Number of pings in transit
+	U8			mLastPingID;				// ID of the last ping that we sent out
 
 
 	// Used for determining the resend time for reliable resends.
-	U32		mPingDelay;             // raw ping delay
-	F32		mPingDelayAveraged;     // averaged ping delay (fast attack/slow decay)
+	U32Milliseconds		mPingDelay;             // raw ping delay
+	F32Milliseconds		mPingDelayAveraged;     // averaged ping delay (fast attack/slow decay)
 
-	typedef std::map<TPACKETID, U64> packet_time_map;
+	typedef std::map<TPACKETID, U64Microseconds> packet_time_map;
 
 	packet_time_map							mPotentialLostPackets;
 	packet_time_map							mRecentlyReceivedReliablePackets;
@@ -247,7 +247,7 @@ protected:
 	S32										mUnackedPacketCount;
 	S32										mUnackedPacketBytes;
 
-	F64										mLastPacketInTime;		// Time of last packet arrival
+	F64Seconds								mLastPacketInTime;		// Time of last packet arrival
 
 	LLUUID									mLocalEndPointID;
 
@@ -259,24 +259,24 @@ protected:
 	U32		mPacketsOut;
 	U32		mPacketsIn;
 	S32		mPacketsLost;
-	S32		mBytesIn;
-	S32		mBytesOut;
-
-	F32		mLastPeriodLength;		// seconds
-	S32		mBytesInLastPeriod;
-	S32		mBytesOutLastPeriod;
-	S32		mBytesInThisPeriod;
-	S32		mBytesOutThisPeriod;
+	S32Bytes	mBytesIn,
+				mBytesOut;
+
+	F32Seconds	mLastPeriodLength;	
+	S32Bytes	mBytesInLastPeriod;
+	S32Bytes	mBytesOutLastPeriod;
+	S32Bytes	mBytesInThisPeriod;
+	S32Bytes	mBytesOutThisPeriod;
 	F32		mPeakBPSIn;				// bits per second, max of all period bps
 	F32		mPeakBPSOut;			// bits per second, max of all period bps
-	F64		mPeriodTime;
+	F64Seconds	mPeriodTime;
 	LLTimer	mExistenceTimer;	    // initialized when circuit created, used to track bandwidth numbers
 
 	S32		mCurrentResendCount;	// Number of resent packets since last spam
     U32     mLastPacketGap;         // Gap in sequence number of last packet.
 
-	const F32 mHeartbeatInterval;
-	const F32 mHeartbeatTimeout;
+	const F32Seconds mHeartbeatInterval;
+	const F32Seconds mHeartbeatTimeout;
 };
 
 
@@ -286,7 +286,7 @@ class LLCircuit
 {
 public:
 	// CREATORS
-	LLCircuit(const F32 circuit_heartbeat_interval, const F32 circuit_timeout);
+	LLCircuit(const F32Seconds circuit_heartbeat_interval, const F32Seconds circuit_timeout);
 	~LLCircuit();
 
 	// ACCESSORS
@@ -341,7 +341,7 @@ protected:
 	mutable LLCircuitData* mLastCircuit;
 
 private:
-	const F32 mHeartbeatInterval;
-	const F32 mHeartbeatTimeout;
+	const F32Seconds mHeartbeatInterval;
+	const F32Seconds mHeartbeatTimeout;
 };
 #endif
diff --git a/indra/llmessage/llhttpassetstorage.cpp b/indra/llmessage/llhttpassetstorage.cpp
index 0479f0fd32..d9b537941b 100755
--- a/indra/llmessage/llhttpassetstorage.cpp
+++ b/indra/llmessage/llhttpassetstorage.cpp
@@ -1064,7 +1064,7 @@ void LLHTTPAssetStorage::bumpTimedOutUploads()
 {
 	bool user_waiting=FALSE;
 
-	F64 mt_secs = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds mt_secs = LLMessageSystem::getMessageTimeSeconds();
 
 	if (mPendingUploads.size())
 	{
diff --git a/indra/llmessage/llpacketack.cpp b/indra/llmessage/llpacketack.cpp
index f08d3404ea..c3c022c297 100755
--- a/indra/llmessage/llpacketack.cpp
+++ b/indra/llmessage/llpacketack.cpp
@@ -50,7 +50,7 @@ LLReliablePacket::LLReliablePacket(
 		mHost = params->mHost;
 		mRetries = params->mRetries;
 		mPingBasedRetry = params->mPingBasedRetry;
-		mTimeout = params->mTimeout;
+		mTimeout = F32Seconds(params->mTimeout);
 		mCallback = params->mCallback;
 		mCallbackData = params->mCallbackData;
 		mMessageName = params->mMessageName;
@@ -59,13 +59,13 @@ LLReliablePacket::LLReliablePacket(
 	{
 		mRetries = 0;
 		mPingBasedRetry = TRUE;
-		mTimeout = 0.f;
+		mTimeout = F32Seconds(0.f);
 		mCallback = NULL;
 		mCallbackData = NULL;
 		mMessageName = NULL;
 	}
 
-	mExpirationTime = (F64)((S64)totalTime())/1000000.0 + mTimeout;
+	mExpirationTime = (F64Seconds)totalTime() + mTimeout;
 	mPacketID = ntohl(*((U32*)(&buf_ptr[PHL_PACKET_ID])));
 
 	mSocket = socket;
diff --git a/indra/llmessage/llpacketack.h b/indra/llmessage/llpacketack.h
index 2ef3c48e44..0a5604f74f 100755
--- a/indra/llmessage/llpacketack.h
+++ b/indra/llmessage/llpacketack.h
@@ -28,6 +28,7 @@
 #define LL_LLPACKETACK_H
 
 #include "llhost.h"
+#include "llunit.h"
 
 class LLReliablePacketParams
 {
@@ -35,7 +36,7 @@ public:
 	LLHost mHost;
 	S32 mRetries;
 	BOOL mPingBasedRetry;
-	F32 mTimeout;
+	F32Seconds mTimeout;
 	void (*mCallback)(void **,S32);
 	void** mCallbackData;
 	char* mMessageName;
@@ -63,7 +64,7 @@ public:
 		const LLHost& host,
 		S32 retries,
 		BOOL ping_based_retry,
-		F32 timeout, 
+		F32Seconds timeout, 
 		void (*callback)(void**,S32),
 		void** callback_data, char* name)
 	{
@@ -98,7 +99,7 @@ protected:
 	LLHost mHost;
 	S32 mRetries;
 	BOOL mPingBasedRetry;
-	F32 mTimeout;
+	F32Seconds mTimeout;
 	void (*mCallback)(void**,S32);
 	void** mCallbackData;
 	char* mMessageName;
@@ -108,7 +109,7 @@ protected:
 
 	TPACKETID mPacketID;
 
-	F64 mExpirationTime;
+	F64Seconds mExpirationTime;
 };
 
 #endif
diff --git a/indra/llmessage/llthrottle.cpp b/indra/llmessage/llthrottle.cpp
index 181c594205..00eaa7e2ec 100755
--- a/indra/llmessage/llthrottle.cpp
+++ b/indra/llmessage/llthrottle.cpp
@@ -53,8 +53,8 @@ F32 LLThrottle::getAvailable()
 {
 	// use a temporary bits_available
 	// since we don't want to change mBitsAvailable every time
-	F32 elapsed_time = (F32)(LLMessageSystem::getMessageTimeSeconds() - mLastSendTime);
-	return mAvailable + (mRate * elapsed_time);
+	F32Seconds elapsed_time = LLMessageSystem::getMessageTimeSeconds() - mLastSendTime;
+	return mAvailable + (mRate * elapsed_time.value());
 }
 
 BOOL LLThrottle::checkOverflow(const F32 amount)
@@ -65,8 +65,8 @@ BOOL LLThrottle::checkOverflow(const F32 amount)
 
 	// use a temporary bits_available
 	// since we don't want to change mBitsAvailable every time
-	F32 elapsed_time =  (F32)(LLMessageSystem::getMessageTimeSeconds() - mLastSendTime);
-	F32 amount_available = mAvailable + (mRate * elapsed_time);
+	F32Seconds elapsed_time =  LLMessageSystem::getMessageTimeSeconds() - mLastSendTime;
+	F32 amount_available = mAvailable + (mRate * elapsed_time.value());
 
 	if ((amount_available >= lookahead_amount) || (amount_available > amount))
 	{
@@ -80,17 +80,17 @@ BOOL LLThrottle::checkOverflow(const F32 amount)
 
 BOOL LLThrottle::throttleOverflow(const F32 amount)
 {
-	F32 elapsed_time;
+	F32Seconds elapsed_time;
 	F32 lookahead_amount;
 	BOOL retval = TRUE;
 
 	lookahead_amount = mRate * mLookaheadSecs;
 
-	F64 mt_sec = LLMessageSystem::getMessageTimeSeconds();
-	elapsed_time = (F32)(mt_sec - mLastSendTime);
+	F64Seconds mt_sec = LLMessageSystem::getMessageTimeSeconds();
+	elapsed_time = mt_sec - mLastSendTime;
 	mLastSendTime = mt_sec;
 
-	mAvailable += mRate * elapsed_time;
+	mAvailable += mRate * elapsed_time.value();
 
 	if (mAvailable >= lookahead_amount)
 	{
@@ -222,7 +222,7 @@ void LLThrottleGroup::unpackThrottle(LLDataPacker &dp)
 // into NOT resetting the system.
 void LLThrottleGroup::resetDynamicAdjust()
 {
-	F64 mt_sec = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds mt_sec = LLMessageSystem::getMessageTimeSeconds();
 	S32 i;
 	for (i = 0; i < TC_EOF; i++)
 	{
@@ -269,8 +269,8 @@ S32		LLThrottleGroup::getAvailable(S32 throttle_cat)
 
 	// use a temporary bits_available
 	// since we don't want to change mBitsAvailable every time
-	F32 elapsed_time = (F32)(LLMessageSystem::getMessageTimeSeconds() - mLastSendTime[throttle_cat]);
-	F32 bits_available = mBitsAvailable[throttle_cat] + (category_bps * elapsed_time);
+	F32Seconds elapsed_time = LLMessageSystem::getMessageTimeSeconds() - mLastSendTime[throttle_cat];
+	F32 bits_available = mBitsAvailable[throttle_cat] + (category_bps * elapsed_time.value());
 
 	if (bits_available >= lookahead_bits)
 	{
@@ -294,8 +294,8 @@ BOOL LLThrottleGroup::checkOverflow(S32 throttle_cat, F32 bits)
 
 	// use a temporary bits_available
 	// since we don't want to change mBitsAvailable every time
-	F32 elapsed_time = (F32)(LLMessageSystem::getMessageTimeSeconds() - mLastSendTime[throttle_cat]);
-	F32 bits_available = mBitsAvailable[throttle_cat] + (category_bps * elapsed_time);
+	F32Seconds elapsed_time = LLMessageSystem::getMessageTimeSeconds() - mLastSendTime[throttle_cat];
+	F32 bits_available = mBitsAvailable[throttle_cat] + (category_bps * elapsed_time.value());
 
 	if (bits_available >= lookahead_bits)
 	{
@@ -315,7 +315,7 @@ BOOL LLThrottleGroup::checkOverflow(S32 throttle_cat, F32 bits)
 
 BOOL LLThrottleGroup::throttleOverflow(S32 throttle_cat, F32 bits)
 {
-	F32 elapsed_time;
+	F32Seconds elapsed_time;
 	F32 category_bps;
 	F32 lookahead_bits;
 	BOOL retval = TRUE;
@@ -323,10 +323,10 @@ BOOL LLThrottleGroup::throttleOverflow(S32 throttle_cat, F32 bits)
 	category_bps = mCurrentBPS[throttle_cat];
 	lookahead_bits = category_bps * THROTTLE_LOOKAHEAD_TIME;
 
-	F64 mt_sec = LLMessageSystem::getMessageTimeSeconds();
-	elapsed_time = (F32)(mt_sec - mLastSendTime[throttle_cat]);
+	F64Seconds mt_sec = LLMessageSystem::getMessageTimeSeconds();
+	elapsed_time = mt_sec - mLastSendTime[throttle_cat];
 	mLastSendTime[throttle_cat] = mt_sec;
-	mBitsAvailable[throttle_cat] += category_bps * elapsed_time;
+	mBitsAvailable[throttle_cat] += category_bps * elapsed_time.value();
 
 	if (mBitsAvailable[throttle_cat] >= lookahead_bits)
 	{
@@ -365,7 +365,7 @@ BOOL LLThrottleGroup::dynamicAdjust()
 
 	S32 i;
 
-	F64 mt_sec = LLMessageSystem::getMessageTimeSeconds();
+	F64Seconds mt_sec = LLMessageSystem::getMessageTimeSeconds();
 
 	// Only dynamically adjust every few seconds
 	if ((mt_sec - mDynamicAdjustTime) < DYNAMIC_ADJUST_TIME)
diff --git a/indra/llmessage/llthrottle.h b/indra/llmessage/llthrottle.h
index ed0aeb4602..e43e54f61b 100755
--- a/indra/llmessage/llthrottle.h
+++ b/indra/llmessage/llthrottle.h
@@ -50,7 +50,7 @@ private:
 	F32 mLookaheadSecs;	// Seconds to look ahead, maximum
 	F32	mRate;	// BPS available, dynamically adjusted
 	F32	mAvailable;	// Bits available to send right now on each channel
-	F64	mLastSendTime;		// Time since last send on this channel
+	F64Seconds	mLastSendTime;		// Time since last send on this channel
 };
 
 typedef enum e_throttle_categories
@@ -93,8 +93,8 @@ protected:
 	F32		mBitsSentThisPeriod[TC_EOF];	// Sent in this dynamic allocation period
 	F32		mBitsSentHistory[TC_EOF];		// Sent before this dynamic allocation period, adjusted to one period length
 
-	F64		mLastSendTime[TC_EOF];		// Time since last send on this channel
-	F64		mDynamicAdjustTime;	// Only dynamic adjust every 2 seconds or so.
+	F64Seconds	mLastSendTime[TC_EOF];		// Time since last send on this channel
+	F64Seconds	mDynamicAdjustTime;	// Only dynamic adjust every 2 seconds or so.
 
 };
 
diff --git a/indra/llmessage/lltransfermanager.cpp b/indra/llmessage/lltransfermanager.cpp
index e647df1c11..71be13ab18 100755
--- a/indra/llmessage/lltransfermanager.cpp
+++ b/indra/llmessage/lltransfermanager.cpp
@@ -815,7 +815,7 @@ void LLTransferSourceChannel::updateTransfers()
 		gMessageSystem->addS32("Status", status);
 		gMessageSystem->addBinaryData("Data", datap, data_size);
 		sent_bytes = gMessageSystem->getCurrentSendTotal();
-		gMessageSystem->sendReliable(getHost(), LL_DEFAULT_RELIABLE_RETRIES, TRUE, 0.f,
+		gMessageSystem->sendReliable(getHost(), LL_DEFAULT_RELIABLE_RETRIES, TRUE, F32Seconds(0.f),
 									 LLTransferManager::reliablePacketCallback, (void**)cb_uuid);
 
 		// Do bookkeeping for the throttle
diff --git a/indra/llmessage/message.cpp b/indra/llmessage/message.cpp
index 2b377670f1..1f4dd11f73 100755
--- a/indra/llmessage/message.cpp
+++ b/indra/llmessage/message.cpp
@@ -238,7 +238,7 @@ LLMessageSystem::LLMessageSystem(const std::string& filename, U32 port,
 								 S32 version_patch,
 								 bool failure_is_fatal,
 								 const F32 circuit_heartbeat_interval, const F32 circuit_timeout) :
-	mCircuitInfo(circuit_heartbeat_interval, circuit_timeout),
+	mCircuitInfo(F32Seconds(circuit_heartbeat_interval), F32Seconds(circuit_timeout)),
 	mLastMessageFromTrustedMessageService(false)
 {
 	init();
@@ -303,11 +303,11 @@ LLMessageSystem::LLMessageSystem(const std::string& filename, U32 port,
 	mPollInfop->mPollFD.desc.s = aprSocketp;
 	mPollInfop->mPollFD.client_data = NULL;
 
-	F64 mt_sec = getMessageTimeSeconds();
+	F64Seconds mt_sec = getMessageTimeSeconds();
 	mResendDumpTime = mt_sec;
 	mMessageCountTime = mt_sec;
 	mCircuitPrintTime = mt_sec;
-	mCurrentMessageTimeSeconds = mt_sec;
+	mCurrentMessageTime = F64Seconds(mt_sec);
 
 	// Constants for dumping output based on message processing time/count
 	mNumMessageCounts = 0;
@@ -531,7 +531,7 @@ BOOL LLMessageSystem::checkMessages( S64 frame_count )
 	{
 		// This is the first message being handled after a resetReceiveCounts,
 		// we must be starting the message processing loop.  Reset the timers.
-		mCurrentMessageTimeSeconds = totalTime() * SEC_PER_USEC;
+		mCurrentMessageTime = totalTime();
 		mMessageCountTime = getMessageTimeSeconds();
 	}
 
@@ -758,7 +758,7 @@ BOOL LLMessageSystem::checkMessages( S64 frame_count )
 		}
 	} while (!valid_packet && receive_size > 0);
 
-	F64 mt_sec = getMessageTimeSeconds();
+	F64Seconds mt_sec = getMessageTimeSeconds();
 	// Check to see if we need to print debug info
 	if ((mt_sec - mCircuitPrintTime) > mCircuitPrintFreq)
 	{
@@ -789,7 +789,7 @@ S32	LLMessageSystem::getReceiveBytes() const
 
 void LLMessageSystem::processAcks()
 {
-	F64 mt_sec = getMessageTimeSeconds();
+	F64Seconds mt_sec = getMessageTimeSeconds();
 	{
 		gTransferManager.updateTransfers();
 
@@ -836,7 +836,7 @@ void LLMessageSystem::processAcks()
 		if (mMaxMessageTime >= 0.f)
 		{
 			// This is one of the only places where we're required to get REAL message system time.
-			mReceiveTime = (F32)(getMessageTimeSeconds(TRUE) - mMessageCountTime);
+			mReceiveTime = getMessageTimeSeconds(TRUE) - mMessageCountTime;
 			if (mReceiveTime > mMaxMessageTime)
 			{
 				dump = TRUE;
@@ -1010,13 +1010,13 @@ S32 LLMessageSystem::sendReliable(const LLHost &host)
 
 S32 LLMessageSystem::sendSemiReliable(const LLHost &host, void (*callback)(void **,S32), void ** callback_data)
 {
-	F32 timeout;
+	F32Seconds timeout;
 
 	LLCircuitData *cdp = mCircuitInfo.findCircuit(host);
 	if (cdp)
 	{
 		timeout = llmax(LL_MINIMUM_SEMIRELIABLE_TIMEOUT_SECONDS,
-						LL_SEMIRELIABLE_TIMEOUT_FACTOR * cdp->getPingDelayAveraged());
+						F32Seconds(LL_SEMIRELIABLE_TIMEOUT_FACTOR * cdp->getPingDelayAveraged()));
 	}
 	else
 	{
@@ -1032,7 +1032,7 @@ S32 LLMessageSystem::sendSemiReliable(const LLHost &host, void (*callback)(void
 S32 LLMessageSystem::sendReliable(	const LLHost &host, 
 									S32 retries, 
 									BOOL ping_based_timeout,
-									F32 timeout, 
+									F32Seconds timeout, 
 									void (*callback)(void **,S32), 
 									void ** callback_data)
 {
@@ -1041,11 +1041,11 @@ S32 LLMessageSystem::sendReliable(	const LLHost &host,
 	    LLCircuitData *cdp = mCircuitInfo.findCircuit(host);
 	    if (cdp)
 	    {
-		    timeout = llmax(LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS, LL_RELIABLE_TIMEOUT_FACTOR * cdp->getPingDelayAveraged());
+		    timeout = llmax(LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS, F32Seconds(LL_RELIABLE_TIMEOUT_FACTOR * cdp->getPingDelayAveraged()));
 	    }
 	    else
 	    {
-		    timeout = llmax(LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS, LL_RELIABLE_TIMEOUT_FACTOR * LL_AVERAGED_PING_MAX);
+		    timeout = llmax(LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS, F32Seconds(LL_RELIABLE_TIMEOUT_FACTOR * LL_AVERAGED_PING_MAX));
 	    }
 	}
 
@@ -1077,7 +1077,7 @@ void LLMessageSystem::forwardReliable(const U32 circuit_code)
 S32 LLMessageSystem::forwardReliable(	const LLHost &host, 
 										S32 retries, 
 										BOOL ping_based_timeout,
-										F32 timeout, 
+										F32Seconds timeout, 
 										void (*callback)(void **,S32), 
 										void ** callback_data)
 {
@@ -1087,13 +1087,13 @@ S32 LLMessageSystem::forwardReliable(	const LLHost &host,
 
 S32 LLMessageSystem::flushSemiReliable(const LLHost &host, void (*callback)(void **,S32), void ** callback_data)
 {
-	F32 timeout; 
+	F32Seconds timeout; 
 
 	LLCircuitData *cdp = mCircuitInfo.findCircuit(host);
 	if (cdp)
 	{
 		timeout = llmax(LL_MINIMUM_SEMIRELIABLE_TIMEOUT_SECONDS,
-						LL_SEMIRELIABLE_TIMEOUT_FACTOR * cdp->getPingDelayAveraged());
+						F32Seconds(LL_SEMIRELIABLE_TIMEOUT_FACTOR * cdp->getPingDelayAveraged()));
 	}
 	else
 	{
@@ -3389,15 +3389,15 @@ void LLMessageSystem::dumpPacketToLog()
 
 
 //static
-U64 LLMessageSystem::getMessageTimeUsecs(const BOOL update)
+U64Microseconds LLMessageSystem::getMessageTimeUsecs(const BOOL update)
 {
 	if (gMessageSystem)
 	{
 		if (update)
 		{
-			gMessageSystem->mCurrentMessageTimeSeconds = totalTime()*SEC_PER_USEC;
+			gMessageSystem->mCurrentMessageTime = totalTime();
 		}
-		return (U64)(gMessageSystem->mCurrentMessageTimeSeconds * USEC_PER_SEC);
+		return gMessageSystem->mCurrentMessageTime;
 	}
 	else
 	{
@@ -3406,19 +3406,19 @@ U64 LLMessageSystem::getMessageTimeUsecs(const BOOL update)
 }
 
 //static
-F64 LLMessageSystem::getMessageTimeSeconds(const BOOL update)
+F64Seconds LLMessageSystem::getMessageTimeSeconds(const BOOL update)
 {
 	if (gMessageSystem)
 	{
 		if (update)
 		{
-			gMessageSystem->mCurrentMessageTimeSeconds = totalTime()*SEC_PER_USEC;
+			gMessageSystem->mCurrentMessageTime = totalTime();
 		}
-		return gMessageSystem->mCurrentMessageTimeSeconds;
+		return gMessageSystem->mCurrentMessageTime;
 	}
 	else
 	{
-		return totalTime()*SEC_PER_USEC;
+		return F64Seconds(totalTime());
 	}
 }
 
diff --git a/indra/llmessage/message.h b/indra/llmessage/message.h
index af0eb109e3..75eccc7f75 100755
--- a/indra/llmessage/message.h
+++ b/indra/llmessage/message.h
@@ -142,18 +142,14 @@ enum EPacketHeaderLayout
 
 
 const S32 LL_DEFAULT_RELIABLE_RETRIES = 3;
-const F32 LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS = 1.f;
-const F32 LL_MINIMUM_SEMIRELIABLE_TIMEOUT_SECONDS = 1.f;
-const F32 LL_PING_BASED_TIMEOUT_DUMMY = 0.0f;
-
-// *NOTE: Maybe these factors shouldn't include the msec to sec conversion
-// implicitly.
-// However, all units should be MKS.
-const F32 LL_SEMIRELIABLE_TIMEOUT_FACTOR	= 5.f / 1000.f;		// factor * averaged ping
-const F32 LL_RELIABLE_TIMEOUT_FACTOR		= 5.f / 1000.f;      // factor * averaged ping
-const F32 LL_FILE_XFER_TIMEOUT_FACTOR		= 5.f / 1000.f;      // factor * averaged ping
-const F32 LL_LOST_TIMEOUT_FACTOR			= 16.f / 1000.f;     // factor * averaged ping for marking packets "Lost"
-const F32 LL_MAX_LOST_TIMEOUT				= 5.f;				// Maximum amount of time before considering something "lost"
+const F32Seconds LL_MINIMUM_RELIABLE_TIMEOUT_SECONDS(1.f);
+const F32Seconds LL_MINIMUM_SEMIRELIABLE_TIMEOUT_SECONDS(1.f);
+const F32Seconds LL_PING_BASED_TIMEOUT_DUMMY(0.0f);
+
+const F32 LL_SEMIRELIABLE_TIMEOUT_FACTOR	= 5.f;		// averaged ping
+const F32 LL_RELIABLE_TIMEOUT_FACTOR		= 5.f;		// averaged ping
+const F32 LL_LOST_TIMEOUT_FACTOR			= 16.f;     // averaged ping for marking packets "Lost"
+const F32Seconds LL_MAX_LOST_TIMEOUT(5.f);				// Maximum amount of time before considering something "lost"
 
 const S32 MAX_MESSAGE_COUNT_NUM = 1024;
 
@@ -270,7 +266,7 @@ public:
 	BOOL                mSendReliable;              // does the outgoing message require a pos ack?
 
 	LLCircuit 	 		mCircuitInfo;
-	F64					mCircuitPrintTime;	    // used to print circuit debug info every couple minutes
+	F64Seconds			mCircuitPrintTime;	    // used to print circuit debug info every couple minutes
 	F32					mCircuitPrintFreq;	    // seconds
 
 	std::map<U64, U32>	mIPPortToCircuitCode;
@@ -469,7 +465,7 @@ public:
 	S32	sendReliable(	const LLHost &host, 
 							S32 retries, 
 							BOOL ping_based_retries,
-							F32 timeout, 
+							F32Seconds timeout, 
 							void (*callback)(void **,S32), 
 							void ** callback_data);
 
@@ -489,7 +485,7 @@ public:
 		const LLHost &host, 
 		S32 retries, 
 		BOOL ping_based_timeout,
-		F32 timeout, 
+		F32Seconds timeout, 
 		void (*callback)(void **,S32), 
 		void ** callback_data);
 
@@ -683,8 +679,8 @@ public:
 	void setMaxMessageTime(const F32 seconds);	// Max time to process messages before warning and dumping (neg to disable)
 	void setMaxMessageCounts(const S32 num);	// Max number of messages before dumping (neg to disable)
 	
-	static U64 getMessageTimeUsecs(const BOOL update = FALSE);	// Get the current message system time in microseconds
-	static F64 getMessageTimeSeconds(const BOOL update = FALSE); // Get the current message system time in seconds
+	static U64Microseconds getMessageTimeUsecs(const BOOL update = FALSE);	// Get the current message system time in microseconds
+	static F64Seconds getMessageTimeSeconds(const BOOL update = FALSE); // Get the current message system time in seconds
 
 	static void setTimeDecodes(BOOL b);
 	static void setTimeDecodesSpamThreshold(F32 seconds); 
@@ -783,16 +779,16 @@ private:
 	BOOL	mbError;
 	S32	mErrorCode;
 
-	F64										mResendDumpTime; // The last time we dumped resends
+	F64Seconds										mResendDumpTime; // The last time we dumped resends
 
 	LLMessageCountInfo mMessageCountList[MAX_MESSAGE_COUNT_NUM];
 	S32 mNumMessageCounts;
-	F32 mReceiveTime;
-	F32 mMaxMessageTime; // Max number of seconds for processing messages
+	F32Seconds mReceiveTime;
+	F32Seconds mMaxMessageTime; // Max number of seconds for processing messages
 	S32 mMaxMessageCounts; // Max number of messages to process before dumping.
-	F64 mMessageCountTime;
+	F64Seconds mMessageCountTime;
 
-	F64 mCurrentMessageTimeSeconds; // The current "message system time" (updated the first call to checkMessages after a resetReceiveCount
+	F64Seconds mCurrentMessageTime; // The current "message system time" (updated the first call to checkMessages after a resetReceiveCount
 
 	// message system exceptions
 	typedef std::pair<msg_exception_callback, void*> exception_t;
diff --git a/indra/llui/llscrolllistctrl.cpp b/indra/llui/llscrolllistctrl.cpp
index f335b5dec3..224c2b918d 100755
--- a/indra/llui/llscrolllistctrl.cpp
+++ b/indra/llui/llscrolllistctrl.cpp
@@ -1443,7 +1443,7 @@ void LLScrollListCtrl::drawItems()
 
 		LLColor4 highlight_color = LLColor4::white;
 		static LLUICachedControl<F32> type_ahead_timeout ("TypeAheadTimeout", 0);
-		highlight_color.mV[VALPHA] = clamp_rescale(mSearchTimer.getElapsedTimeF32(), type_ahead_timeout * 0.7f, type_ahead_timeout, 0.4f, 0.f);
+		highlight_color.mV[VALPHA] = clamp_rescale(mSearchTimer.getElapsedTimeF32(), type_ahead_timeout * 0.7f, type_ahead_timeout(), 0.4f, 0.f);
 
 		S32 first_line = mScrollLines;
 		S32 last_line = llmin((S32)mItemList.size() - 1, mScrollLines + getLinesPerPage());
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 0a1a78c5b4..339a8f1ab0 100755
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -324,7 +324,7 @@ BOOL				gUseWireframe = FALSE;
 LLVFS* gStaticVFS = NULL;
 
 LLMemoryInfo gSysMemory;
-U64 gMemoryAllocated = 0; // updated in display_stats() in llviewerdisplay.cpp
+U64Bytes gMemoryAllocated(0); // updated in display_stats() in llviewerdisplay.cpp
 
 std::string gLastVersionChannel;
 
@@ -3329,8 +3329,8 @@ void LLAppViewer::writeSystemInfo()
 	gDebugInfo["CPUInfo"]["CPUSSE"] = gSysCPU.hasSSE();
 	gDebugInfo["CPUInfo"]["CPUSSE2"] = gSysCPU.hasSSE2();
 	
-	gDebugInfo["RAMInfo"]["Physical"] = (LLSD::Integer)(gSysMemory.getPhysicalMemoryKB());
-	gDebugInfo["RAMInfo"]["Allocated"] = (LLSD::Integer)(gMemoryAllocated>>10); // MB -> KB
+	gDebugInfo["RAMInfo"]["Physical"] = (LLSD::Integer)(gSysMemory.getPhysicalMemoryKB().value());
+	gDebugInfo["RAMInfo"]["Allocated"] = (LLSD::Integer)(gMemoryAllocated.valueInUnits<LLUnits::Kibibytes>());
 	gDebugInfo["OSInfo"] = getOSInfo().getOSStringSimple();
 
 	// The user is not logged on yet, but record the current grid choice login url
diff --git a/indra/newview/llappviewer.h b/indra/newview/llappviewer.h
index 60a1045f58..10452e64e2 100755
--- a/indra/newview/llappviewer.h
+++ b/indra/newview/llappviewer.h
@@ -367,7 +367,7 @@ class LLVFS;
 extern LLVFS	*gStaticVFS;
 
 extern LLMemoryInfo gSysMemory;
-extern U64 gMemoryAllocated;
+extern U64Bytes gMemoryAllocated;
 
 extern std::string gLastVersionChannel;
 
diff --git a/indra/newview/llfloaterabout.cpp b/indra/newview/llfloaterabout.cpp
index 84f0d115ae..ad94949863 100755
--- a/indra/newview/llfloaterabout.cpp
+++ b/indra/newview/llfloaterabout.cpp
@@ -259,7 +259,7 @@ LLSD LLFloaterAbout::getInfo()
 
 	// CPU
 	info["CPU"] = gSysCPU.getCPUString();
-	info["MEMORY_MB"] = LLSD::Integer(gSysMemory.getPhysicalMemoryKB() / 1024);
+	info["MEMORY_MB"] = LLSD::Integer(gSysMemory.getPhysicalMemoryKB().valueInUnits<LLUnits::Mibibytes>());
 	// Moved hack adjustment to Windows memory size into llsys.cpp
 	info["OS_VERSION"] = LLAppViewer::instance()->getOSInfo().getOSString();
 	info["GRAPHICS_CARD_VENDOR"] = (const char*)(glGetString(GL_VENDOR));
diff --git a/indra/newview/llfloaterhardwaresettings.cpp b/indra/newview/llfloaterhardwaresettings.cpp
index 116bd241c4..adb490d524 100755
--- a/indra/newview/llfloaterhardwaresettings.cpp
+++ b/indra/newview/llfloaterhardwaresettings.cpp
@@ -89,10 +89,10 @@ void LLFloaterHardwareSettings::refresh()
 
 void LLFloaterHardwareSettings::refreshEnabledState()
 {
-	S32 min_tex_mem = LLViewerTextureList::getMinVideoRamSetting();
-	S32 max_tex_mem = LLViewerTextureList::getMaxVideoRamSetting();
-	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setMinValue(min_tex_mem);
-	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setMaxValue(max_tex_mem);
+	S32Mibibytes min_tex_mem = LLViewerTextureList::getMinVideoRamSetting();
+	S32Mibibytes max_tex_mem = LLViewerTextureList::getMaxVideoRamSetting();
+	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setMinValue(min_tex_mem.value());
+	getChild<LLSliderCtrl>("GraphicsCardTextureMemory")->setMaxValue(max_tex_mem.value());
 
 	if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderVBOEnable") ||
 		!gGLManager.mHasVertexBufferObject)
diff --git a/indra/newview/llinspect.cpp b/indra/newview/llinspect.cpp
index 14382e82d7..e6cb068613 100755
--- a/indra/newview/llinspect.cpp
+++ b/indra/newview/llinspect.cpp
@@ -59,7 +59,7 @@ void LLInspect::draw()
 	}
 	else if (mCloseTimer.getStarted())
 	{
-		F32 alpha = clamp_rescale(mCloseTimer.getElapsedTimeF32(), 0.f, FADE_TIME, 1.f, 0.f);
+		F32 alpha = clamp_rescale(mCloseTimer.getElapsedTimeF32(), 0.f, FADE_TIME(), 1.f, 0.f);
 		LLViewDrawContext context(alpha);
 		LLFloater::draw();
 		if (mCloseTimer.getElapsedTimeF32() > FADE_TIME)
diff --git a/indra/newview/llstartup.cpp b/indra/newview/llstartup.cpp
index 61def8f723..fdd289c823 100755
--- a/indra/newview/llstartup.cpp
+++ b/indra/newview/llstartup.cpp
@@ -1507,7 +1507,7 @@ bool idle_startup()
 			gFirstSim,
 			gSavedSettings.getS32("UseCircuitCodeMaxRetries"),
 			FALSE,
-			gSavedSettings.getF32("UseCircuitCodeTimeout"),
+			(F32Seconds)gSavedSettings.getF32("UseCircuitCodeTimeout"),
 			use_circuit_callback,
 			NULL);
 
diff --git a/indra/newview/llviewercontrol.cpp b/indra/newview/llviewercontrol.cpp
index 5523b541a9..d0491450dc 100755
--- a/indra/newview/llviewercontrol.cpp
+++ b/indra/newview/llviewercontrol.cpp
@@ -287,7 +287,7 @@ static bool handleMaxPartCountChanged(const LLSD& newvalue)
 
 static bool handleVideoMemoryChanged(const LLSD& newvalue)
 {
-	gTextureList.updateMaxResidentTexMem(newvalue.asInteger());
+	gTextureList.updateMaxResidentTexMem(S32Mibibytes(newvalue.asInteger()));
 	return true;
 }
 
diff --git a/indra/newview/llviewerdisplay.cpp b/indra/newview/llviewerdisplay.cpp
index 965c6ffbc6..cb5078b988 100755
--- a/indra/newview/llviewerdisplay.cpp
+++ b/indra/newview/llviewerdisplay.cpp
@@ -221,8 +221,8 @@ void display_stats()
 	if (mem_log_freq > 0.f && gRecentMemoryTime.getElapsedTimeF32() >= mem_log_freq)
 	{
 		gMemoryAllocated = LLMemory::getCurrentRSS();
-		U32 memory = (U32)(gMemoryAllocated / (1024*1024));
-		LL_INFOS() << llformat("MEMORY: %d MB", memory) << LL_ENDL;
+		U32Mibibytes memory = gMemoryAllocated;
+		LL_INFOS() << llformat("MEMORY: %d MB", memory.value()) << LL_ENDL;
 		LLMemory::logMemoryInfo(TRUE) ;
 		gRecentMemoryTime.reset();
 	}
diff --git a/indra/newview/llviewerobject.cpp b/indra/newview/llviewerobject.cpp
index 3d75f86154..b054e519e0 100755
--- a/indra/newview/llviewerobject.cpp
+++ b/indra/newview/llviewerobject.cpp
@@ -119,8 +119,8 @@ BOOL		LLViewerObject::sPulseEnabled(FALSE);
 BOOL		LLViewerObject::sUseSharedDrawables(FALSE); // TRUE
 
 // sMaxUpdateInterpolationTime must be greater than sPhaseOutUpdateInterpolationTime
-F64			LLViewerObject::sMaxUpdateInterpolationTime = 3.0;		// For motion interpolation: after X seconds with no updates, don't predict object motion
-F64			LLViewerObject::sPhaseOutUpdateInterpolationTime = 2.0;	// For motion interpolation: after Y seconds with no updates, taper off motion prediction
+F64Seconds	LLViewerObject::sMaxUpdateInterpolationTime(3.0);		// For motion interpolation: after X seconds with no updates, don't predict object motion
+F64Seconds	LLViewerObject::sPhaseOutUpdateInterpolationTime(2.0);	// For motion interpolation: after Y seconds with no updates, taper off motion prediction
 
 std::map<std::string, U32> LLViewerObject::sObjectDataMap;
 
@@ -2190,7 +2190,7 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 		LLCircuitData *cdp = gMessageSystem->mCircuitInfo.findCircuit(mesgsys->getSender());
 		if (cdp)
 		{
-			F32 ping_delay = 0.5f * mTimeDilation * ( ((F32)cdp->getPingDelay()) * 0.001f + gFrameDTClamped);
+			F32 ping_delay = 0.5f * mTimeDilation * ( ((F32)cdp->getPingDelay().valueInUnits<LLUnits::Seconds>()) + gFrameDTClamped);
 			LLVector3 diff = getVelocity() * ping_delay; 
 			new_pos_parent += diff;
 		}
@@ -2491,7 +2491,7 @@ void LLViewerObject::interpolateLinearMotion(const F64 & time, const F32 & dt)
 				if (cdp)
 				{
 					// Find out how many seconds since last packet arrived on the circuit
-					F64 time_since_last_packet = LLMessageSystem::getMessageTimeSeconds() - cdp->getLastPacketInTime();
+					F64Seconds time_since_last_packet = LLMessageSystem::getMessageTimeSeconds() - cdp->getLastPacketInTime();
 
 					if (!cdp->isAlive() ||		// Circuit is dead or blocked
 						 cdp->isBlocked() ||	// or doesn't seem to be getting any packets
diff --git a/indra/newview/llviewerobject.h b/indra/newview/llviewerobject.h
index 5556a4c7d3..3943709049 100755
--- a/indra/newview/llviewerobject.h
+++ b/indra/newview/llviewerobject.h
@@ -780,7 +780,7 @@ protected:
 	mutable LLVector3		mPositionRegion;
 	mutable LLVector3		mPositionAgent;
 
-	static void setPhaseOutUpdateInterpolationTime(F32 value)	{ sPhaseOutUpdateInterpolationTime = (F64) value;	}
+	static void setPhaseOutUpdateInterpolationTime(F32 value)	{ sPhaseOutUpdateInterpolationTime = (F64Seconds) value;	}
 	static void setMaxUpdateInterpolationTime(F32 value)		{ sMaxUpdateInterpolationTime = (F64) value;	}
 
 	static void	setVelocityInterpolate(BOOL value)		{ sVelocityInterpolate = value;	}
@@ -789,8 +789,8 @@ protected:
 private:	
 	static S32 sNumObjects;
 
-	static F64 sPhaseOutUpdateInterpolationTime;	// For motion interpolation
-	static F64 sMaxUpdateInterpolationTime;			// For motion interpolation
+	static F64Seconds sPhaseOutUpdateInterpolationTime;	// For motion interpolation
+	static F64Seconds sMaxUpdateInterpolationTime;			// For motion interpolation
 
 	static BOOL sVelocityInterpolate;
 	static BOOL sPingInterpolate;
diff --git a/indra/newview/llviewerregion.h b/indra/newview/llviewerregion.h
index 9d2a333b1b..e07c2aa8d0 100755
--- a/indra/newview/llviewerregion.h
+++ b/indra/newview/llviewerregion.h
@@ -401,7 +401,7 @@ public:
 	LLWind  mWind;
 	LLViewerParcelOverlay	*mParcelOverlay;
 
-	F32		mBitsReceived;
+	F32Bits	mBitsReceived;
 	F32		mPacketsReceived;
 
 	LLMatrix4 mRenderMatrix;
@@ -436,14 +436,14 @@ private:
 	BOOL mIsEstateManager;
 
 	U32		mPacketsIn;
-	U32		mBitsIn;
-	U32		mLastBitsIn;
+	U32Bits	mBitsIn,
+			mLastBitsIn;
 	U32		mLastPacketsIn;
 	U32		mPacketsOut;
 	U32		mLastPacketsOut;
 	S32		mPacketsLost;
 	S32		mLastPacketsLost;
-	U32		mPingDelay;
+	U32Milliseconds		mPingDelay;
 	F32		mDeltaTime;				// Time since last measurement of lastPackets, Bits, etc
 
 	U64		mRegionFlags;			// includes damage flags
diff --git a/indra/newview/llviewerstats.cpp b/indra/newview/llviewerstats.cpp
index 67005e1978..bb2c13df33 100755
--- a/indra/newview/llviewerstats.cpp
+++ b/indra/newview/llviewerstats.cpp
@@ -304,8 +304,8 @@ U32Bytes				gTotalWorldData,
 								gTotalTextureData;
 U32								gSimPingCount = 0;
 U32Bits				gObjectData;
-F32		gAvgSimPing = 0.f;
-U32Bytes		gTotalTextureBytesPerBoostLevel[LLViewerTexture::MAX_GL_IMAGE_CATEGORY] = {U32Bytes(0)};
+F32Milliseconds		gAvgSimPing(0.f);
+U32Bytes			gTotalTextureBytesPerBoostLevel[LLViewerTexture::MAX_GL_IMAGE_CATEGORY] = {U32Bytes(0)};
 
 extern U32  gVisCompared;
 extern U32  gVisTested;
@@ -359,7 +359,7 @@ void update_statistics()
 	if (cdp)
 	{
 		sample(LLStatViewer::SIM_PING, F64Milliseconds (cdp->getPingDelay()));
-		gAvgSimPing = ((gAvgSimPing * (F32)gSimPingCount) + (F32)(cdp->getPingDelay())) / ((F32)gSimPingCount + 1);
+		gAvgSimPing = ((gAvgSimPing * (F32)gSimPingCount) + (F32)(cdp->getPingDelay().value())) / ((F32)gSimPingCount + 1);
 		gSimPingCount++;
 	}
 	else
@@ -494,14 +494,14 @@ void send_stats()
 	gSimFrames   = (F32) gFrameCount;
 
 	agent["agents_in_view"] = LLVOAvatar::sNumVisibleAvatars;
-	agent["ping"] = gAvgSimPing;
+	agent["ping"] = gAvgSimPing.value();
 	agent["meters_traveled"] = gAgent.getDistanceTraveled();
 	agent["regions_visited"] = gAgent.getRegionsVisited();
 	agent["mem_use"] = LLMemory::getCurrentRSS() / 1024.0;
 
 	LLSD &system = body["system"];
 	
-	system["ram"] = (S32) gSysMemory.getPhysicalMemoryKB();
+	system["ram"] = (S32) gSysMemory.getPhysicalMemoryKB().value();
 	system["os"] = LLAppViewer::instance()->getOSInfo().getOSStringSimple();
 	system["cpu"] = gSysCPU.getCPUString();
 	unsigned char MACAddress[MAC_ADDRESS_BYTES];
diff --git a/indra/newview/llviewertexturelist.cpp b/indra/newview/llviewertexturelist.cpp
index 888174a6cf..f4dc04bd51 100755
--- a/indra/newview/llviewertexturelist.cpp
+++ b/indra/newview/llviewertexturelist.cpp
@@ -89,7 +89,7 @@ void LLViewerTextureList::init()
 	mMaxTotalTextureMemInMegaBytes = 0 ;
 	
 	// Update how much texture RAM we're allowed to use.
-	updateMaxResidentTexMem(0); // 0 = use current
+	updateMaxResidentTexMem(S32Mibibytes(0)); // 0 = use current
 	
 	doPreloadImages();
 }
@@ -1231,28 +1231,28 @@ const S32 MIN_VIDEO_RAM = 32;
 const S32 MAX_VIDEO_RAM = 512; // 512MB max for performance reasons.
 
 // Returns min setting for TextureMemory (in MB)
-S32 LLViewerTextureList::getMinVideoRamSetting()
+S32Mibibytes LLViewerTextureList::getMinVideoRamSetting()
 {
-	S32 system_ram = (S32)BYTES_TO_MEGA_BYTES(gSysMemory.getPhysicalMemoryClamped());
+	S32Mibibytes system_ram = gSysMemory.getPhysicalMemoryClamped();
 	//min texture mem sets to 64M if total physical mem is more than 1.5GB
-	return (system_ram > 1500) ? 64 : gMinVideoRam.value() ;
+	return (system_ram > S32Mibibytes(1500)) ? S32Mibibytes(64) : gMinVideoRam ;
 }
 
 //static
 // Returns max setting for TextureMemory (in MB)
-S32 LLViewerTextureList::getMaxVideoRamSetting(bool get_recommended)
+S32Mibibytes LLViewerTextureList::getMaxVideoRamSetting(bool get_recommended)
 {
-	S32 max_texmem;
+	S32Mibibytes max_texmem;
 	if (gGLManager.mVRAM != 0)
 	{
 		// Treat any card with < 32 MB (shudder) as having 32 MB
 		//  - it's going to be swapping constantly regardless
-		S32 max_vram = gGLManager.mVRAM;
+		S32Mibibytes max_vram(gGLManager.mVRAM);
 
 		if(gGLManager.mIsATI)
 		{
 			//shrink the availabe vram for ATI cards because some of them do not handel texture swapping well.
-			max_vram = (S32)(max_vram * 0.75f);  
+			max_vram = max_vram * 0.75f; 
 		}
 
 		max_vram = llmax(max_vram, getMinVideoRamSetting());
@@ -1278,26 +1278,26 @@ S32 LLViewerTextureList::getMaxVideoRamSetting(bool get_recommended)
 		LL_WARNS() << "VRAM amount not detected, defaulting to " << max_texmem << " MB" << LL_ENDL;
 	}
 
-	S32 system_ram = (S32)BYTES_TO_MEGA_BYTES(gSysMemory.getPhysicalMemoryClamped()); // In MB
+	S32Mibibytes system_ram = gSysMemory.getPhysicalMemoryClamped(); // In MB
 	//LL_INFOS() << "*** DETECTED " << system_ram << " MB of system memory." << LL_ENDL;
 	if (get_recommended)
-		max_texmem = llmin(max_texmem, (S32)(system_ram/2));
+		max_texmem = llmin(max_texmem, system_ram/2);
 	else
-		max_texmem = llmin(max_texmem, (S32)(system_ram));
+		max_texmem = llmin(max_texmem, system_ram);
 		
-	max_texmem = llclamp(max_texmem, getMinVideoRamSetting(), gMaxVideoRam.value()); 
+	max_texmem = llclamp(max_texmem, getMinVideoRamSetting(), gMaxVideoRam); 
 	
 	return max_texmem;
 }
 
-const S32 VIDEO_CARD_FRAMEBUFFER_MEM = 12; // MB
-const S32 MIN_MEM_FOR_NON_TEXTURE = 512 ; //MB
-void LLViewerTextureList::updateMaxResidentTexMem(S32 mem)
+const S32Mibibytes VIDEO_CARD_FRAMEBUFFER_MEM(12);
+const S32Mibibytes MIN_MEM_FOR_NON_TEXTURE(512);
+void LLViewerTextureList::updateMaxResidentTexMem(S32Mibibytes mem)
 {
 	// Initialize the image pipeline VRAM settings
-	S32 cur_mem = gSavedSettings.getS32("TextureMemory");
+	S32Mibibytes cur_mem(gSavedSettings.getS32("TextureMemory"));
 	F32 mem_multiplier = gSavedSettings.getF32("RenderTextureMemoryMultiple");
-	S32 default_mem = getMaxVideoRamSetting(true); // recommended default
+	S32Mibibytes default_mem(getMaxVideoRamSetting(true)); // recommended default
 	if (mem == 0)
 	{
 		mem = cur_mem > 0 ? cur_mem : default_mem;
@@ -1308,20 +1308,20 @@ void LLViewerTextureList::updateMaxResidentTexMem(S32 mem)
 	}
 
 	// limit the texture memory to a multiple of the default if we've found some cards to behave poorly otherwise
-	mem = llmin(mem, (S32) (mem_multiplier * (F32) default_mem));
+	mem = llmin(mem, S32Mibibytes(mem_multiplier * (F32Mibibytes)default_mem));
 
 	mem = llclamp(mem, getMinVideoRamSetting(), getMaxVideoRamSetting());
 	if (mem != cur_mem)
 	{
-		gSavedSettings.setS32("TextureMemory", mem);
+		gSavedSettings.setS32("TextureMemory", mem.value());
 		return; //listener will re-enter this function
 	}
 
 	// TODO: set available resident texture mem based on use by other subsystems
 	// currently max(12MB, VRAM/4) assumed...
 	
-	S32 vb_mem = mem;
-	S32 fb_mem = llmax(VIDEO_CARD_FRAMEBUFFER_MEM, vb_mem/4);
+	S32Mibibytes vb_mem = mem;
+	S32Mibibytes fb_mem = llmax(VIDEO_CARD_FRAMEBUFFER_MEM, vb_mem/4);
 	mMaxResidentTexMemInMegaBytes = (vb_mem - fb_mem) ; //in MB
 	
 	mMaxTotalTextureMemInMegaBytes = mMaxResidentTexMemInMegaBytes * 2;
@@ -1331,12 +1331,12 @@ void LLViewerTextureList::updateMaxResidentTexMem(S32 mem)
 	}
 
 	//system mem
-	S32 system_ram = (S32)BYTES_TO_MEGA_BYTES(gSysMemory.getPhysicalMemoryClamped()); // In MB
+	S32Mibibytes system_ram = gSysMemory.getPhysicalMemoryClamped();
 
 	//minimum memory reserved for non-texture use.
 	//if system_raw >= 1GB, reserve at least 512MB for non-texture use;
 	//otherwise reserve half of the system_ram for non-texture use.
-	S32 min_non_texture_mem = llmin(system_ram / 2, MIN_MEM_FOR_NON_TEXTURE) ; 
+	S32Mibibytes min_non_texture_mem = llmin(system_ram / 2, MIN_MEM_FOR_NON_TEXTURE) ; 
 
 	if (mMaxTotalTextureMemInMegaBytes > system_ram - min_non_texture_mem)
 	{
@@ -1514,18 +1514,19 @@ void LLViewerTextureList::processImageNotInDatabase(LLMessageSystem *msg,void **
 ///////////////////////////////////////////////////////////////////////////////
 
 //static
-const U32 SIXTEEN_MEG = 0x1000000;
-S32 LLViewerTextureList::calcMaxTextureRAM()
+const LLUnitImplicit<F32, LLUnits::Mibibytes> SIXTEEN_MEG(16);
+S32Bytes LLViewerTextureList::calcMaxTextureRAM()
 {
 	// Decide the maximum amount of RAM we should allow the user to allocate to texture cache
 	LLMemoryInfo memory_info;
-	U32 available_memory = memory_info.getPhysicalMemoryClamped();
+	LLUnitImplicit<F32, LLUnits::Mibibytes> available_memory = memory_info.getPhysicalMemoryClamped();
 	
-	clamp_rescale((F32)available_memory,
-				  (F32)(SIXTEEN_MEG * 16),
-				  (F32)U32_MAX,
-				  (F32)(SIXTEEN_MEG * 4),
-				  (F32)(U32_MAX >> 1));
+	// as originally written, this code was a no-op.  Not sure of the side effect of making it actually work
+	/*clamp_rescale(available_memory.value(),
+				  (SIXTEEN_MEG * 16),
+				  (F32Mibibytes)U32_MAX,
+				  (SIXTEEN_MEG * 4),
+				  (F32Mibibytes)(U32_MAX >> 1));*/
 	return available_memory;
 }
 
diff --git a/indra/newview/llviewertexturelist.h b/indra/newview/llviewertexturelist.h
index 53bda6e6ab..9817fea811 100755
--- a/indra/newview/llviewertexturelist.h
+++ b/indra/newview/llviewertexturelist.h
@@ -71,7 +71,7 @@ public:
 	static BOOL createUploadFile(const std::string& filename, const std::string& out_filename, const U8 codec);
 	static LLPointer<LLImageJ2C> convertToUploadFile(LLPointer<LLImageRaw> raw_image);
 	static void processImageNotInDatabase( LLMessageSystem *msg, void **user_data );
-	static S32 calcMaxTextureRAM();
+	static S32Bytes calcMaxTextureRAM();
 	static void receiveImageHeader(LLMessageSystem *msg, void **user_data);
 	static void receiveImagePacket(LLMessageSystem *msg, void **user_data);
 
@@ -105,7 +105,7 @@ public:
 	S32Mibibytes getMaxTotalTextureMem() const   { return mMaxTotalTextureMemInMegaBytes;}
 	S32 getNumImages()					{ return mImageList.size(); }
 
-	void updateMaxResidentTexMem(S32 mem);
+	void updateMaxResidentTexMem(S32Mibibytes mem);
 	
 	void doPreloadImages();
 	void doPrefetchImages();
@@ -113,8 +113,8 @@ public:
 	void clearFetchingRequests();
 	void setDebugFetching(LLViewerFetchedTexture* tex, S32 debug_level);
 
-	static S32 getMinVideoRamSetting();
-	static S32 getMaxVideoRamSetting(bool get_recommended = false);
+	static S32Mibibytes getMinVideoRamSetting();
+	static S32Mibibytes getMaxVideoRamSetting(bool get_recommended = false);
 	
 private:
 	void updateImagesDecodePriorities();