4 files changed, 33 insertions, 0 deletions
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 6f11a6d616..280c3d642c 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -5585,6 +5585,19 @@
       <key>Value</key>
       <integer>8</integer>
     </map>
+
+   <key>PluginUseReadThread</key>
+    <map>
+      <key>Comment</key>
+      <string>Use a separate thread to read incoming messages from plugins</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>0</integer>
+    </map>
+
     <key>PrecachingDelay</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 2f9bbb1407..4f7c0c3549 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -1530,6 +1530,9 @@ bool LLAppViewer::cleanup()
 	
 	LLViewerMedia::saveCookieFile();
 
+	// Stop the plugin read thread if it's running.
+	LLPluginProcessParent::setUseReadThread(false);
+
 	llinfos << "Shutting down Threads" << llendflush;
 
 	// Let threads finish
diff --git a/indra/newview/llviewermedia.cpp b/indra/newview/llviewermedia.cpp
index fd2bb0fdf9..a4d8dddfe4 100644
--- a/indra/newview/llviewermedia.cpp
+++ b/indra/newview/llviewermedia.cpp
@@ -732,10 +732,17 @@ static bool proximity_comparitor(const LLViewerMediaImpl* i1, const LLViewerMedi
 	}
 }
 
+static LLFastTimer::DeclareTimer FTM_MEDIA_UPDATE("Update Media");
+
 //////////////////////////////////////////////////////////////////////////////////////////
 // static
 void LLViewerMedia::updateMedia(void *dummy_arg)
 {
+	LLFastTimer t1(FTM_MEDIA_UPDATE);
+	
+	// Enable/disable the plugin read thread
+	LLPluginProcessParent::setUseReadThread(gSavedSettings.getBOOL("PluginUseReadThread"));
+	
 	sAnyMediaShowing = false;
 	sUpdatedCookies = getCookieStore()->getChangedCookies();
 	if(!sUpdatedCookies.empty())
diff --git a/indra/newview/skins/default/xui/en/menu_viewer.xml b/indra/newview/skins/default/xui/en/menu_viewer.xml
index 3af80f63fe..df4f33adf0 100644
--- a/indra/newview/skins/default/xui/en/menu_viewer.xml
+++ b/indra/newview/skins/default/xui/en/menu_viewer.xml
@@ -1339,6 +1339,16 @@
              function="ToggleControl"
              parameter="RunMultipleThreads" />
         </menu_item_check>
+        <menu_item_check
+         label="Use Plugin Read Thread"
+         name="Use Plugin Read Thread">
+            <menu_item_check.on_check
+             function="CheckControl"
+             parameter="PluginUseReadThread" />
+            <menu_item_check.on_click
+             function="ToggleControl"
+             parameter="PluginUseReadThread" />
+        </menu_item_check>
         <menu_item_call
          label="Clear Group Cache"
          name="ClearGroupCache">