3 files changed, 32 insertions, 3 deletions

diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 333c92e50d..f6cff3d443 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -984,6 +984,7 @@ bool LLAppViewer::mainLoop()
 	LLVoiceClient::getInstance()->init(gServicePump);
 	LLTimer frameTimer,idleTimer;
 	LLTimer debugTime;
+	LLFrameTimer memCheckTimer;
 	LLViewerJoystick* joystick(LLViewerJoystick::getInstance());
 	joystick->setNeedsReset(true);
 
@@ -994,11 +995,29 @@ bool LLAppViewer::mainLoop()
     // point of posting.
     LLSD newFrame;
 
+	const F32 memory_check_interval = 1.0f ; //second
+
 	// Handle messages
 	while (!LLApp::isExiting())
 	{
 		LLFastTimer::nextFrame(); // Should be outside of any timer instances
 
+		//clear call stack records
+		llclearcallstacks;
+
+		//check memory availability information
+		{
+			if(memory_check_interval < memCheckTimer.getElapsedTimeF32())
+			{
+				memCheckTimer.reset() ;
+
+				//update the availability of memory
+				gSysMemory.getAvailableMemoryKB(mAvailPhysicalMemInKB, mAvailVirtualMemInKB) ;
+			}
+			llcallstacks << "Available physical mem(KB): " << mAvailPhysicalMemInKB << llcallstacksendl ;
+			llcallstacks << "Available virtual mem(KB): " << mAvailVirtualMemInKB << llcallstacksendl ;
+		}
+
 		try
 		{
 			pingMainloopTimeout("Main:MiscNativeWindowEvents");
@@ -1225,11 +1244,20 @@ bool LLAppViewer::mainLoop()
 				resumeMainloopTimeout();
 	
 				pingMainloopTimeout("Main:End");
-			}
-						
+			}			
 		}
 		catch(std::bad_alloc)
 		{			
+			{
+				llinfos << "Availabe physical memory(KB) at the beginning of the frame: " << mAvailPhysicalMemInKB << llendl ;
+				llinfos << "Availabe virtual memory(KB) at the beginning of the frame: " << mAvailVirtualMemInKB << llendl ;
+
+				gSysMemory.getAvailableMemoryKB(mAvailPhysicalMemInKB, mAvailVirtualMemInKB) ;
+
+				llinfos << "Current availabe physical memory(KB): " << mAvailPhysicalMemInKB << llendl ;
+				llinfos << "Current availabe virtual memory(KB): " << mAvailVirtualMemInKB << llendl ;
+			}
+
 			//stop memory leaking simulation
 			LLFloaterMemLeak* mem_leak_instance =
 				LLFloaterReg::findTypedInstance<LLFloaterMemLeak>("mem_leaking");
diff --git a/indra/newview/llappviewer.h b/indra/newview/llappviewer.h
index 56d88f07c8..a70a727c5d 100644
--- a/indra/newview/llappviewer.h
+++ b/indra/newview/llappviewer.h
@@ -258,6 +258,8 @@ private:
 
 	std::set<struct apr_dso_handle_t*> mPlugins;
 
+	U32 mAvailPhysicalMemInKB ;
+	U32 mAvailVirtualMemInKB ;
 public:
 	//some information for updater
 	typedef struct
diff --git a/indra/newview/llviewerdisplay.cpp b/indra/newview/llviewerdisplay.cpp
index 916cbe2267..7c8b52d0b6 100644
--- a/indra/newview/llviewerdisplay.cpp
+++ b/indra/newview/llviewerdisplay.cpp
@@ -706,7 +706,6 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 		//
 		// Doing this here gives hardware occlusion queries extra time to complete
 		LLAppViewer::instance()->pingMainloopTimeout("Display:UpdateImages");
-		LLError::LLCallStacks::clear() ;
 		
 		{
 			LLMemType mt_iu(LLMemType::MTYPE_DISPLAY_IMAGE_UPDATE);