diff --git a/Core/CoreTiming.cpp b/Core/CoreTiming.cpp
index 77558817a2..a080adb17e 100644
--- a/Core/CoreTiming.cpp
+++ b/Core/CoreTiming.cpp
@@ -204,7 +204,7 @@ void ScheduleEvent_Threadsafe(s64 cyclesIntoFuture, int event_type, u64 userdata
 {
 	std::lock_guard<std::recursive_mutex> lk(externalEventSection);
 	Event *ne = GetNewTsEvent();
-	ne->time = globalTimer + cyclesIntoFuture;
+	ne->time = GetTicks() + cyclesIntoFuture;
 	ne->type = event_type;
 	ne->next = 0;
 	ne->userdata = userdata;
@@ -337,7 +337,10 @@ s64 UnscheduleThreadsafeEvent(int event_type, u64 userdata)
 		}
 	}
 	if (!tsFirst)
+	{
+		tsLast = NULL;
 		return result;
+	}
 
 	Event *prev = tsFirst;
 	Event *ptr = prev->next;
@@ -348,6 +351,8 @@ s64 UnscheduleThreadsafeEvent(int event_type, u64 userdata)
 			result = ptr->time - globalTimer;
 
 			prev->next = ptr->next;
+			if (ptr == tsLast)
+				tsLast = prev;
 			FreeTsEvent(ptr);
 			ptr = prev->next;
 		}
@@ -439,6 +444,7 @@ void RemoveThreadsafeEvent(int event_type)
 	}
 	if (!tsFirst)
 	{
+		tsLast = NULL;
 		return;
 	}
 	Event *prev = tsFirst;
@@ -448,6 +454,8 @@ void RemoveThreadsafeEvent(int event_type)
 		if (ptr->type == event_type)
 		{	
 			prev->next = ptr->next;
+			if (ptr == tsLast)
+				tsLast = prev;
 			FreeTsEvent(ptr);
 			ptr = prev->next;
 		}
@@ -460,7 +468,7 @@ void RemoveThreadsafeEvent(int event_type)
 }
 
 void RemoveAllEvents(int event_type)
-{	
+{
 	RemoveThreadsafeEvent(event_type);
 	RemoveEvent(event_type);
 }
@@ -491,7 +499,7 @@ void MoveEvents()
 	Common::AtomicStoreRelease(hasTsEvents, 0);
 
 	std::lock_guard<std::recursive_mutex> lk(externalEventSection);
-		// Move events from async queue into main queue
+	// Move events from async queue into main queue
 	while (tsFirst)
 	{
 		Event *next = tsFirst->next;
@@ -511,12 +519,14 @@ void MoveEvents()
 	}
 }
 
-void AdvanceQuick()
+void Advance()
 {
 	int cyclesExecuted = slicelength - currentMIPS->downcount;
 	globalTimer += cyclesExecuted;
 	currentMIPS->downcount = slicelength;
 
+	if (Common::AtomicLoadAcquire(hasTsEvents))
+		MoveEvents();
 	ProcessFifoWaitEvents();
 
 	if (!first)
@@ -535,14 +545,6 @@ void AdvanceQuick()
 		advanceCallback(cyclesExecuted);
 }
 
-void Advance()
-{
-	if (Common::AtomicLoadAcquire(hasTsEvents))
-		MoveEvents();
-
-	AdvanceQuick();
-}
-
 void LogPendingEvents()
 {
 	Event *ptr = first;
diff --git a/Core/CoreTiming.h b/Core/CoreTiming.h
index 8d8281f6c8..77af7078c8 100644
--- a/Core/CoreTiming.h
+++ b/Core/CoreTiming.h
@@ -99,7 +99,6 @@ namespace CoreTiming
 	void RemoveAllEvents(int event_type);
 	bool IsScheduled(int event_type);
 	void Advance();
-	void AdvanceQuick();
 	void MoveEvents();
 	void ProcessFifoWaitEvents();
 
diff --git a/Core/HLE/sceGe.cpp b/Core/HLE/sceGe.cpp
index ead492db14..f037b510d0 100644
--- a/Core/HLE/sceGe.cpp
+++ b/Core/HLE/sceGe.cpp
@@ -199,11 +199,11 @@ bool __GeTriggerSync(WaitType waitType, int id, u64 atTicks)
 	s64 future = atTicks - CoreTiming::GetTicks();
 	if (waitType == WAITTYPE_GEDRAWSYNC)
 	{
-		s64 left = CoreTiming::UnscheduleEvent(geSyncEvent, userdata);
+		s64 left = CoreTiming::UnscheduleThreadsafeEvent(geSyncEvent, userdata);
 		if (left > future)
 			future = left;
 	}
-	CoreTiming::ScheduleEvent(future, geSyncEvent, userdata);
+	CoreTiming::ScheduleEvent_Threadsafe(future, geSyncEvent, userdata);
 	return true;
 }
 
@@ -211,7 +211,7 @@ bool __GeTriggerSync(WaitType waitType, int id, u64 atTicks)
 bool __GeTriggerInterrupt(int listid, u32 pc, u64 atTicks)
 {
 	u64 userdata = (u64)listid << 32 | (u64) pc;
-	CoreTiming::ScheduleEvent(atTicks - CoreTiming::GetTicks(), geInterruptEvent, userdata);
+	CoreTiming::ScheduleEvent_Threadsafe(atTicks - CoreTiming::GetTicks(), geInterruptEvent, userdata);
 	return true;
 }
 
@@ -279,7 +279,7 @@ int sceGeListUpdateStallAddr(u32 displayListID, u32 stallAddress)
 {
 	DEBUG_LOG(HLE, "sceGeListUpdateStallAddr(dlid=%i, stalladdr=%08x)", displayListID, stallAddress);
 	hleEatCycles(190);
-	CoreTiming::AdvanceQuick();
+	CoreTiming::Advance();
 	return gpu->UpdateStall(displayListID, stallAddress);
 }
 
diff --git a/Core/HLE/sceKernelThread.cpp b/Core/HLE/sceKernelThread.cpp
index 6e2147cb40..6ebc42ca29 100644
--- a/Core/HLE/sceKernelThread.cpp
+++ b/Core/HLE/sceKernelThread.cpp
@@ -1169,7 +1169,7 @@ void __KernelIdle()
 	CoreTiming::Idle();
 	// Advance must happen between Idle and Reschedule, so that threads that were waiting for something
 	// that was triggered at the end of the Idle period must get a chance to be scheduled.
-	CoreTiming::AdvanceQuick();
+	CoreTiming::Advance();
 
 	// We must've exited a callback?
 	if (__KernelInCallback())
@@ -1724,7 +1724,7 @@ void __KernelReSchedule(const char *reason)
 	}
 
 	// Execute any pending events while we're doing scheduling.
-	CoreTiming::AdvanceQuick();
+	CoreTiming::Advance();
 	if (__IsInInterrupt() || __KernelInCallback() || !__KernelIsDispatchEnabled())
 	{
 		reason = "In Interrupt Or Callback";
diff --git a/Core/SaveState.cpp b/Core/SaveState.cpp
index 28a5aea7f7..d015e44ca4 100644
--- a/Core/SaveState.cpp
+++ b/Core/SaveState.cpp
@@ -60,23 +60,15 @@ namespace SaveState
 		void *cbUserData;
 	};
 
-	static int timer;
 	static bool needsProcess = false;
 	static std::vector<Operation> pending;
 	static std::recursive_mutex mutex;
 
-	void Process(u64 userdata, int cyclesLate);
-
 	void SaveStart::DoState(PointerWrap &p)
 	{
 		// Gotta do CoreTiming first since we'll restore into it.
 		CoreTiming::DoState(p);
 
-		// This save state even saves its own state.
-		p.Do(timer);
-		CoreTiming::RestoreRegisterEvent(timer, "SaveState", Process);
-		p.DoMarker("SaveState");
-
 		Memory::DoState(p);
 		MemoryStick_DoState(p);
 		currentMIPS->DoState(p);
@@ -96,10 +88,8 @@ namespace SaveState
 		if (Core_IsInactive() && __KernelIsRunning())
 		{
 			// Warning: this may run on a different thread.
-			Process(0, 0);
+			Process();
 		}
-		else if (__KernelIsRunning())
-			CoreTiming::ScheduleEvent_Threadsafe(0, timer);
 		else
 			needsProcess = true;
 	}
@@ -210,8 +200,12 @@ namespace SaveState
 		return copy;
 	}
 
-	void Process(u64 userdata, int cyclesLate)
+	void Process()
 	{
+		if (!needsProcess)
+			return;
+		needsProcess = false;
+
 		if (!__KernelIsRunning())
 		{
 			ERROR_LOG(COMMON, "Savestate failure: Unable to load without kernel, this should never happen.");
@@ -272,15 +266,9 @@ namespace SaveState
 
 	void Init()
 	{
-		timer = CoreTiming::RegisterEvent("SaveState", Process);
 		// Make sure there's a directory for save slots
 		pspFileSystem.MkDir("ms0:/PSP/PPSSPP_STATE");
 
 		std::lock_guard<std::recursive_mutex> guard(mutex);
-		if (needsProcess)
-		{
-			CoreTiming::ScheduleEvent(0, timer);
-			needsProcess = false;
-		}
 	}
 }
diff --git a/Core/SaveState.h b/Core/SaveState.h
index eb3e075a11..8327122100 100644
--- a/Core/SaveState.h
+++ b/Core/SaveState.h
@@ -31,7 +31,9 @@ namespace SaveState
 
 	void SaveSlot(int slot, Callback callback, void *cbUserData = 0);
 	void LoadSlot(int slot, Callback callback, void *cbUserData = 0);
+	// Checks whether there's an existing save in the specified slot.
 	bool HasSaveInSlot(int slot);
+	// Returns -1 if there's no newest slot.
 	int GetNewestSlot();
 
 	// Load the specified file into the current state (async.)
@@ -45,4 +47,7 @@ namespace SaveState
 	// For testing / automated tests.  Runs a save state verification pass (async.)
 	// Warning: callback will be called on a different thread.
 	void Verify(Callback callback = 0, void *cbUserData = 0);
+
+	// Check if there's any save stating needing to be done.  Normally called once per frame.
+	void Process();
 };
diff --git a/Core/System.cpp b/Core/System.cpp
index ad90ca04e5..ea434b71bc 100644
--- a/Core/System.cpp
+++ b/Core/System.cpp
@@ -38,6 +38,7 @@
 #include "Core/Loaders.h"
 #include "Core/PSPLoaders.h"
 #include "Core/ELF/ParamSFO.h"
+#include "Core/SaveState.h"
 #include "Common/LogManager.h"
 
 MetaFileSystem pspFileSystem;
@@ -151,6 +152,7 @@ void PSP_Shutdown()
 }
 
 void PSP_RunLoopUntil(u64 globalticks) {
+	SaveState::Process();
 	mipsr4k.RunLoopUntil(globalticks);
 }
 
diff --git a/GPU/GLES/DisplayListInterpreter.cpp b/GPU/GLES/DisplayListInterpreter.cpp
index ead1c70679..5d7bf4c1d1 100644
--- a/GPU/GLES/DisplayListInterpreter.cpp
+++ b/GPU/GLES/DisplayListInterpreter.cpp
@@ -326,12 +326,6 @@ void GLES_GPU::CopyDisplayToOutput() {
 
 // Render queue
 
-u32 GLES_GPU::DrawSync(int mode)
-{
-	transformDraw_.Flush();
-	return GPUCommon::DrawSync(mode);
-}
-
 void GLES_GPU::FastRunLoop(DisplayList &list) {
 	for (; downcount > 0; --downcount) {
 		u32 op = Memory::ReadUnchecked_U32(list.pc);
diff --git a/GPU/GLES/DisplayListInterpreter.h b/GPU/GLES/DisplayListInterpreter.h
index 944c7798a7..1e86e06a76 100644
--- a/GPU/GLES/DisplayListInterpreter.h
+++ b/GPU/GLES/DisplayListInterpreter.h
@@ -38,7 +38,6 @@ public:
 	virtual void InitClear();
 	virtual void PreExecuteOp(u32 op, u32 diff);
 	virtual void ExecuteOp(u32 op, u32 diff);
-	virtual u32  DrawSync(int mode);
 
 	virtual void SetDisplayFramebuffer(u32 framebuf, u32 stride, GEBufferFormat format);
 	virtual void CopyDisplayToOutput();
diff --git a/GPU/GPUCommon.cpp b/GPU/GPUCommon.cpp
index 9bb123a596..6955339a91 100644
--- a/GPU/GPUCommon.cpp
+++ b/GPU/GPUCommon.cpp
@@ -186,6 +186,7 @@ u32 GPUCommon::EnqueueList(u32 listpc, u32 stall, int subIntrBase, bool head)
 	dl.signal = PSP_GE_SIGNAL_NONE;
 	dl.interrupted = false;
 	dl.waitTicks = (u64)-1;
+	dl.interruptsEnabled = interruptsEnabled_;
 
 	if (head) {
 		if (currentList) {
@@ -720,7 +721,7 @@ void GPUCommon::ExecuteOp(u32 op, u32 diff) {
 					break;
 				}
 				// TODO: Technically, jump/call/ret should generate an interrupt, but before the pc change maybe?
-				if (interruptsEnabled_ && trigger) {
+				if (currentList->interruptsEnabled && trigger) {
 					if (__GeTriggerInterrupt(currentList->id, currentList->pc, startingTicks + cyclesExecuted))
 						UpdateState(GPUSTATE_INTERRUPT);
 				}
@@ -729,7 +730,7 @@ void GPUCommon::ExecuteOp(u32 op, u32 diff) {
 		case GE_CMD_FINISH:
 			switch (currentList->signal) {
 			case PSP_GE_SIGNAL_HANDLER_PAUSE:
-				if (interruptsEnabled_) {
+				if (currentList->interruptsEnabled) {
 					if (__GeTriggerInterrupt(currentList->id, currentList->pc, startingTicks + cyclesExecuted))
 						UpdateState(GPUSTATE_INTERRUPT);
 				}
@@ -744,7 +745,7 @@ void GPUCommon::ExecuteOp(u32 op, u32 diff) {
 				currentList->subIntrToken = prev & 0xFFFF;
 				currentList->state = PSP_GE_DL_STATE_COMPLETED;
 				UpdateState(GPUSTATE_DONE);
-				if (!interruptsEnabled_ || !__GeTriggerInterrupt(currentList->id, currentList->pc, startingTicks + cyclesExecuted)) {
+				if (!currentList->interruptsEnabled || !__GeTriggerInterrupt(currentList->id, currentList->pc, startingTicks + cyclesExecuted)) {
 					currentList->waitTicks = startingTicks + cyclesExecuted;
 					busyTicks = std::max(busyTicks, currentList->waitTicks);
 					__GeTriggerSync(WAITTYPE_GELISTSYNC, currentList->id, currentList->waitTicks);
diff --git a/GPU/GPUInterface.h b/GPU/GPUInterface.h
index 7dadd1a36b..2847e972e9 100644
--- a/GPU/GPUInterface.h
+++ b/GPU/GPUInterface.h
@@ -130,6 +130,7 @@ struct DisplayList
 	int stackptr;
 	bool interrupted;
 	u64 waitTicks;
+	bool interruptsEnabled;
 };
 
 enum GPUInvalidationType {