Amend to last commit. This should have been committed too.

OpenSim/Framework/Servers/VersionInfo.cs

@@ -30,7 +30,7 @@ namespace OpenSim
     public class VersionInfo
     {
         private const string VERSION_NUMBER = "0.7.3";
-        private const Flavour VERSION_FLAVOUR = Flavour.Dev;
+        private const Flavour VERSION_FLAVOUR = Flavour.RC2;
 
         public enum Flavour
         {

OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs

@@ -1258,12 +1258,16 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
                 if (neighbour.RegionHandle != sp.Scene.RegionInfo.RegionHandle)
                 {
-                    InformClientOfNeighbourDelegate d = InformClientOfNeighbourAsync;
                     try
                     {
-                        d.BeginInvoke(sp, cagents[count], neighbour, neighbour.ExternalEndPoint, newAgent,
-                                      InformClientOfNeighbourCompleted,
-                                      d);
+                        // Let's put this back at sync, so that it doesn't clog 
+                        // the network, especially for regions in the same physical server.
+                        // We're really not in a hurry here.
+                        InformClientOfNeighbourAsync(sp, cagents[count], neighbour, neighbour.ExternalEndPoint, newAgent);
+                        //InformClientOfNeighbourDelegate d = InformClientOfNeighbourAsync;
+                        //d.BeginInvoke(sp, cagents[count], neighbour, neighbour.ExternalEndPoint, newAgent,
+                        //              InformClientOfNeighbourCompleted,
+                        //              d);
                     }
 
                     catch (ArgumentOutOfRangeException)

OpenSim/Region/CoreModules/ServiceConnectorsOut/Grid/RegionInfoCache.cs

@@ -65,13 +65,26 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Grid
             }
         }
 
+        internal struct ScopedRegionPosition
+        {
+            public UUID m_scopeID;
+            public ulong m_regionHandle;
+            public ScopedRegionPosition(UUID scopeID, ulong handle)
+            {
+                m_scopeID = scopeID;
+                m_regionHandle = handle;
+            }
+        }
+
         private ExpiringCache<ScopedRegionUUID, GridRegion> m_UUIDCache;
         private ExpiringCache<ScopedRegionName, ScopedRegionUUID> m_NameCache;
+        private ExpiringCache<ScopedRegionPosition, GridRegion> m_PositionCache;
 
         public RegionInfoCache()
         {
             m_UUIDCache = new ExpiringCache<ScopedRegionUUID, GridRegion>();
-            m_NameCache = new ExpiringCache<ScopedRegionName, ScopedRegionUUID>(); 
+            m_NameCache = new ExpiringCache<ScopedRegionName, ScopedRegionUUID>();
+            m_PositionCache = new ExpiringCache<ScopedRegionPosition, GridRegion>();
         }
 
         public void Cache(GridRegion rinfo)
@@ -96,6 +109,9 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Grid
             {
                 ScopedRegionName name = new ScopedRegionName(scopeID,rinfo.RegionName);
                 m_NameCache.AddOrUpdate(name, id, CACHE_EXPIRATION_SECONDS);
+
+                ScopedRegionPosition pos = new ScopedRegionPosition(scopeID, rinfo.RegionHandle);
+                m_PositionCache.AddOrUpdate(pos, rinfo, CACHE_EXPIRATION_SECONDS);
             }
         }
 
@@ -114,6 +130,22 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Grid
             return null;
         }
 
+        public GridRegion Get(UUID scopeID, ulong handle, out bool inCache)
+        {
+            inCache = false;
+
+            GridRegion rinfo = null;
+            ScopedRegionPosition pos = new ScopedRegionPosition(scopeID, handle);
+            if (m_PositionCache.TryGetValue(pos, out rinfo))
+            {
+                inCache = true;
+                return rinfo;
+            }
+
+            return null;
+        }
+
+
         public GridRegion Get(UUID scopeID, string name, out bool inCache)
         {
             inCache = false;

OpenSim/Region/CoreModules/ServiceConnectorsOut/Grid/RemoteGridServiceConnector.cs

@@ -186,10 +186,16 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Grid
 
         public GridRegion GetRegionByPosition(UUID scopeID, int x, int y)
         {
-            GridRegion rinfo = m_LocalGridService.GetRegionByPosition(scopeID, x, y);
+            bool inCache = false;
+            GridRegion rinfo = m_RegionInfoCache.Get(scopeID, Util.UIntsToLong((uint)x, (uint)y), out inCache);
+            if (inCache)
+                return rinfo;
+
+            rinfo = m_LocalGridService.GetRegionByPosition(scopeID, x, y);
             if (rinfo == null)
                 rinfo = m_RemoteGridService.GetRegionByPosition(scopeID, x, y);
 
+            m_RegionInfoCache.Cache(rinfo);
             return rinfo;
         }
 

OpenSim/Region/Framework/Scenes/SceneCommunicationService.cs

@@ -140,6 +140,7 @@ namespace OpenSim.Region.Framework.Scenes
             icon.EndInvoke(iar);
         }
 
+        ExpiringCache<string, bool> _failedSims = new ExpiringCache<string, bool>();
         public void SendChildAgentDataUpdate(AgentPosition cAgentData, ScenePresence presence)
         {
             // This assumes that we know what our neighbors are.
@@ -156,16 +157,22 @@ namespace OpenSim.Region.Framework.Scenes
                         // that the region position is cached or performance will degrade
                         Utils.LongToUInts(regionHandle, out x, out y);
                         GridRegion dest = m_scene.GridService.GetRegionByPosition(UUID.Zero, (int)x, (int)y);
-                        if (! simulatorList.Contains(dest.ServerURI))
+                        bool v = true;
+                        if (! simulatorList.Contains(dest.ServerURI) && !_failedSims.TryGetValue(dest.ServerURI, out v))
                         {
                             // we havent seen this simulator before, add it to the list
                             // and send it an update
                             simulatorList.Add(dest.ServerURI);
+                            // Let move this to sync. Mono definitely does not like async networking.
+                            if (!m_scene.SimulationService.UpdateAgent(dest, cAgentData))
+                                // Also if it fails, get it out of the loop for a bit
+                                _failedSims.Add(dest.ServerURI, true, 120);
 
-                            SendChildAgentDataUpdateDelegate d = SendChildAgentDataUpdateAsync;
-                            d.BeginInvoke(cAgentData, m_regionInfo.ScopeID, dest,
-                                          SendChildAgentDataUpdateCompleted,
-                                          d);
+                            // Leaving this here as a reminder that we tried, and it sucks.
+                            //SendChildAgentDataUpdateDelegate d = SendChildAgentDataUpdateAsync;
+                            //d.BeginInvoke(cAgentData, m_regionInfo.ScopeID, dest,
+                            //              SendChildAgentDataUpdateCompleted,
+                            //              d);
                         }
                     }
                 }

OpenSim/Region/Framework/Scenes/ScenePresence.cs

@@ -1219,7 +1219,7 @@ namespace OpenSim.Region.Framework.Scenes
             {
                 IEntityTransferModule m_agentTransfer = m_scene.RequestModuleInterface<IEntityTransferModule>();
                 if (m_agentTransfer != null)
-                    m_agentTransfer.EnableChildAgents(this);
+                    Util.FireAndForget(delegate { m_agentTransfer.EnableChildAgents(this); });
 
                 IFriendsModule friendsModule = m_scene.RequestModuleInterface<IFriendsModule>();
                 if (friendsModule != null)
@@ -2738,7 +2738,8 @@ namespace OpenSim.Region.Framework.Scenes
                 AgentPosition agentpos = new AgentPosition();
                 agentpos.CopyFrom(cadu);
 
-                m_scene.SendOutChildAgentUpdates(agentpos, this);
+                // Let's get this out of the update loop
+                Util.FireAndForget(delegate { m_scene.SendOutChildAgentUpdates(agentpos, this); });
             }
         }