/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSim Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ using System; using System.Collections.Generic; using System.Threading; using System.Timers; using OpenMetaverse; using OpenMetaverse.Packets; using OpenSim.Framework; using OpenSim.Framework.Statistics; using OpenSim.Framework.Statistics.Interfaces; using OpenSim.Region.ClientStack; using Timer=System.Timers.Timer; namespace OpenSim.Region.ClientStack.LindenUDP { public class LLPacketQueue : IPullStatsProvider { private static readonly log4net.ILog m_log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); /// /// Is queueing enabled at all? /// private bool m_enabled = true; private OpenSim.Framework.BlockingQueue SendQueue; private Queue IncomingPacketQueue; private Queue OutgoingPacketQueue; private Queue ResendOutgoingPacketQueue; private Queue LandOutgoingPacketQueue; private Queue WindOutgoingPacketQueue; private Queue CloudOutgoingPacketQueue; private Queue TaskOutgoingPacketQueue; private Queue TaskLowpriorityPacketQueue; private Queue TextureOutgoingPacketQueue; private Queue AssetOutgoingPacketQueue; // private Dictionary PendingAcks = new Dictionary(); // private Dictionary NeedAck = new Dictionary(); // All throttle times and number of bytes are calculated by dividing by this value // This value also determines how many times per throttletimems the timer will run // If throttleimems is 1000 ms, then the timer will fire every 1000/7 milliseconds private int throttleTimeDivisor = 7; private int throttletimems = 1000; private LLPacketThrottle ResendThrottle; private LLPacketThrottle LandThrottle; private LLPacketThrottle WindThrottle; private LLPacketThrottle CloudThrottle; private LLPacketThrottle TaskThrottle; private LLPacketThrottle AssetThrottle; private LLPacketThrottle TextureThrottle; private LLPacketThrottle TotalThrottle; // private long LastThrottle; // private long ThrottleInterval; private Timer throttleTimer; private UUID m_agentId; public LLPacketQueue(UUID agentId, ClientStackUserSettings userSettings) { // While working on this, the BlockingQueue had me fooled for a bit. // The Blocking queue causes the thread to stop until there's something // in it to process. it's an on-purpose threadlock though because // without it, the clientloop will suck up all sim resources. SendQueue = new OpenSim.Framework.BlockingQueue(); IncomingPacketQueue = new Queue(); OutgoingPacketQueue = new Queue(); ResendOutgoingPacketQueue = new Queue(); LandOutgoingPacketQueue = new Queue(); WindOutgoingPacketQueue = new Queue(); CloudOutgoingPacketQueue = new Queue(); TaskOutgoingPacketQueue = new Queue(); TaskLowpriorityPacketQueue = new Queue(); TextureOutgoingPacketQueue = new Queue(); AssetOutgoingPacketQueue = new Queue(); // Set up the throttle classes (min, max, current) in bits per second ResendThrottle = new LLPacketThrottle(5000, 100000, 16000, userSettings.ClientThrottleMultipler); LandThrottle = new LLPacketThrottle(1000, 100000, 2000, userSettings.ClientThrottleMultipler); WindThrottle = new LLPacketThrottle(0, 100000, 0, userSettings.ClientThrottleMultipler); CloudThrottle = new LLPacketThrottle(0, 100000, 0, userSettings.ClientThrottleMultipler); TaskThrottle = new LLPacketThrottle(1000, 800000, 3000, userSettings.ClientThrottleMultipler); AssetThrottle = new LLPacketThrottle(1000, 800000, 1000, userSettings.ClientThrottleMultipler); TextureThrottle = new LLPacketThrottle(1000, 800000, 4000, userSettings.ClientThrottleMultipler); // Total Throttle trumps all - it is the number of bits in total that are allowed to go out per second. ThrottleSettings totalThrottleSettings = userSettings.TotalThrottleSettings; if (null == totalThrottleSettings) { totalThrottleSettings = new ThrottleSettings(0, 1500000, 28000); } TotalThrottle = new LLPacketThrottle( totalThrottleSettings.Min, totalThrottleSettings.Max, totalThrottleSettings.Current, userSettings.ClientThrottleMultipler); throttleTimer = new Timer((int) (throttletimems/throttleTimeDivisor)); throttleTimer.Elapsed += ThrottleTimerElapsed; throttleTimer.Start(); // TIMERS needed for this // LastThrottle = DateTime.Now.Ticks; // ThrottleInterval = (long)(throttletimems/throttleTimeDivisor); m_agentId = agentId; if (StatsManager.SimExtraStats != null) { StatsManager.SimExtraStats.RegisterPacketQueueStatsProvider(m_agentId, this); } } /* STANDARD QUEUE MANIPULATION INTERFACES */ public void Enqueue(LLQueItem item) { if (!m_enabled) { return; } // We could micro lock, but that will tend to actually // probably be worse than just synchronizing on SendQueue if (item == null) { SendQueue.Enqueue(item); return; } if (item.Incoming) { SendQueue.PriorityEnqueue(item); return; } lock (this) { switch (item.throttleType & ThrottleOutPacketType.TypeMask) { case ThrottleOutPacketType.Resend: ThrottleCheck(ref ResendThrottle, ref ResendOutgoingPacketQueue, item); break; case ThrottleOutPacketType.Texture: ThrottleCheck(ref TextureThrottle, ref TextureOutgoingPacketQueue, item); break; case ThrottleOutPacketType.Task: if ((item.throttleType & ThrottleOutPacketType.LowPriority) != 0) ThrottleCheck(ref TaskThrottle, ref TaskLowpriorityPacketQueue, item); else ThrottleCheck(ref TaskThrottle, ref TaskOutgoingPacketQueue, item); break; case ThrottleOutPacketType.Land: ThrottleCheck(ref LandThrottle, ref LandOutgoingPacketQueue, item); break; case ThrottleOutPacketType.Asset: ThrottleCheck(ref AssetThrottle, ref AssetOutgoingPacketQueue, item); break; case ThrottleOutPacketType.Cloud: ThrottleCheck(ref CloudThrottle, ref CloudOutgoingPacketQueue, item); break; case ThrottleOutPacketType.Wind: ThrottleCheck(ref WindThrottle, ref WindOutgoingPacketQueue, item); break; default: // Acknowledgements and other such stuff should go directly to the blocking Queue // Throttling them may and likely 'will' be problematic SendQueue.PriorityEnqueue(item); break; } } } public LLQueItem Dequeue() { return SendQueue.Dequeue(); } public void Flush() { lock (this) { while (PacketsWaiting()) { //Now comes the fun part.. we dump all our elements into m_packetQueue that we've saved up. if (ResendOutgoingPacketQueue.Count > 0) { SendQueue.Enqueue(ResendOutgoingPacketQueue.Dequeue()); } if (LandOutgoingPacketQueue.Count > 0) { SendQueue.Enqueue(LandOutgoingPacketQueue.Dequeue()); } if (WindOutgoingPacketQueue.Count > 0) { SendQueue.Enqueue(WindOutgoingPacketQueue.Dequeue()); } if (CloudOutgoingPacketQueue.Count > 0) { SendQueue.Enqueue(CloudOutgoingPacketQueue.Dequeue()); } if (TaskOutgoingPacketQueue.Count > 0) { SendQueue.PriorityEnqueue(TaskOutgoingPacketQueue.Dequeue()); } if (TaskLowpriorityPacketQueue.Count > 0) { SendQueue.Enqueue(TaskLowpriorityPacketQueue.Dequeue()); } if (TextureOutgoingPacketQueue.Count > 0) { SendQueue.Enqueue(TextureOutgoingPacketQueue.Dequeue()); } if (AssetOutgoingPacketQueue.Count > 0) { SendQueue.Enqueue(AssetOutgoingPacketQueue.Dequeue()); } } // m_log.Info("[THROTTLE]: Processed " + throttleLoops + " packets"); } } public void WipeClean() { m_log.Info("[PACKETQUEUE] Wiping Packet Queues Clean"); lock(this) { ResendOutgoingPacketQueue.Clear(); LandOutgoingPacketQueue.Clear(); WindOutgoingPacketQueue.Clear(); CloudOutgoingPacketQueue.Clear(); TaskOutgoingPacketQueue.Clear(); TaskLowpriorityPacketQueue.Clear(); TextureOutgoingPacketQueue.Clear(); AssetOutgoingPacketQueue.Clear(); SendQueue.Clear(); } } public void Close() { m_log.Info("[PACKETQUEUE] Close called"); Flush(); WipeClean(); // I'm sure there's a dirty joke in here somewhere. -AFrisby m_enabled = false; throttleTimer.Stop(); if (StatsManager.SimExtraStats != null) { StatsManager.SimExtraStats.DeregisterPacketQueueStatsProvider(m_agentId); } } private void ResetCounters() { ResendThrottle.Reset(); LandThrottle.Reset(); WindThrottle.Reset(); CloudThrottle.Reset(); TaskThrottle.Reset(); AssetThrottle.Reset(); TextureThrottle.Reset(); TotalThrottle.Reset(); } private bool PacketsWaiting() { return (ResendOutgoingPacketQueue.Count > 0 || LandOutgoingPacketQueue.Count > 0 || WindOutgoingPacketQueue.Count > 0 || CloudOutgoingPacketQueue.Count > 0 || TaskOutgoingPacketQueue.Count > 0 || TaskLowpriorityPacketQueue.Count > 0 || AssetOutgoingPacketQueue.Count > 0 || TextureOutgoingPacketQueue.Count > 0); } public void ProcessThrottle() { // I was considering this.. Will an event fire if the thread it's on is blocked? // Then I figured out.. it doesn't really matter.. because this thread won't be blocked for long // The General overhead of the UDP protocol gets sent to the queue un-throttled by this // so This'll pick up about around the right time. int MaxThrottleLoops = 4550; // 50*7 packets can be dequeued at once. int throttleLoops = 0; // We're going to dequeue all of the saved up packets until // we've hit the throttle limit or there's no more packets to send lock (this) { ResetCounters(); // m_log.Info("[THROTTLE]: Entering Throttle"); while (TotalThrottle.UnderLimit() && PacketsWaiting() && (throttleLoops <= MaxThrottleLoops)) { throttleLoops++; //Now comes the fun part.. we dump all our elements into m_packetQueue that we've saved up. if (ResendThrottle.UnderLimit() && ResendOutgoingPacketQueue.Count > 0) { LLQueItem qpack = ResendOutgoingPacketQueue.Dequeue(); SendQueue.Enqueue(qpack); TotalThrottle.AddBytes(qpack.Packet.ToBytes().Length); ResendThrottle.AddBytes(qpack.Packet.ToBytes().Length); } if (LandThrottle.UnderLimit() && LandOutgoingPacketQueue.Count > 0) { LLQueItem qpack = LandOutgoingPacketQueue.Dequeue(); SendQueue.Enqueue(qpack); TotalThrottle.AddBytes(qpack.Packet.ToBytes().Length); LandThrottle.AddBytes(qpack.Packet.ToBytes().Length); } if (WindThrottle.UnderLimit() && WindOutgoingPacketQueue.Count > 0) { LLQueItem qpack = WindOutgoingPacketQueue.Dequeue(); SendQueue.Enqueue(qpack); TotalThrottle.AddBytes(qpack.Packet.ToBytes().Length); WindThrottle.AddBytes(qpack.Packet.ToBytes().Length); } if (CloudThrottle.UnderLimit() && CloudOutgoingPacketQueue.Count > 0) { LLQueItem qpack = CloudOutgoingPacketQueue.Dequeue(); SendQueue.Enqueue(qpack); TotalThrottle.AddBytes(qpack.Packet.ToBytes().Length); CloudThrottle.AddBytes(qpack.Packet.ToBytes().Length); } if (TaskThrottle.UnderLimit() && (TaskOutgoingPacketQueue.Count > 0 || TaskLowpriorityPacketQueue.Count > 0)) { LLQueItem qpack; if (TaskOutgoingPacketQueue.Count > 0) { qpack = TaskOutgoingPacketQueue.Dequeue(); SendQueue.PriorityEnqueue(qpack); } else { qpack = TaskLowpriorityPacketQueue.Dequeue(); SendQueue.Enqueue(qpack); } TotalThrottle.AddBytes(qpack.Packet.ToBytes().Length); TaskThrottle.AddBytes(qpack.Packet.ToBytes().Length); } if (TextureThrottle.UnderLimit() && TextureOutgoingPacketQueue.Count > 0) { LLQueItem qpack = TextureOutgoingPacketQueue.Dequeue(); SendQueue.Enqueue(qpack); TotalThrottle.AddBytes(qpack.Packet.ToBytes().Length); TextureThrottle.AddBytes(qpack.Packet.ToBytes().Length); } if (AssetThrottle.UnderLimit() && AssetOutgoingPacketQueue.Count > 0) { LLQueItem qpack = AssetOutgoingPacketQueue.Dequeue(); SendQueue.Enqueue(qpack); TotalThrottle.AddBytes(qpack.Packet.ToBytes().Length); AssetThrottle.AddBytes(qpack.Packet.ToBytes().Length); } } // m_log.Info("[THROTTLE]: Processed " + throttleLoops + " packets"); } } private void ThrottleTimerElapsed(object sender, ElapsedEventArgs e) { // just to change the signature, and that ProcessThrottle // will be used elsewhere possibly ProcessThrottle(); } private void ThrottleCheck(ref LLPacketThrottle throttle, ref Queue q, LLQueItem item) { // The idea.. is if the packet throttle queues are empty // and the client is under throttle for the type. Queue // it up directly. This basically short cuts having to // wait for the timer to fire to put things into the // output queue if ((q.Count == 0) && (throttle.UnderLimit())) { try { Monitor.Enter(this); throttle.AddBytes(item.Packet.ToBytes().Length); TotalThrottle.AddBytes(item.Packet.ToBytes().Length); SendQueue.Enqueue(item); } catch (Exception e) { // Probably a serialization exception m_log.WarnFormat("ThrottleCheck: {0}", e.ToString()); } finally { Monitor.Pulse(this); Monitor.Exit(this); } } else { q.Enqueue(item); } } private static int ScaleThrottle(int value, int curmax, int newmax) { return (int)((value / (float)curmax) * newmax); } public byte[] GetThrottlesPacked(float multiplier) { int singlefloat = 4; float tResend = ResendThrottle.Throttle*multiplier; float tLand = LandThrottle.Throttle*multiplier; float tWind = WindThrottle.Throttle*multiplier; float tCloud = CloudThrottle.Throttle*multiplier; float tTask = TaskThrottle.Throttle*multiplier; float tTexture = TextureThrottle.Throttle*multiplier; float tAsset = AssetThrottle.Throttle*multiplier; byte[] throttles = new byte[singlefloat*7]; int i = 0; Buffer.BlockCopy(BitConverter.GetBytes(tResend), 0, throttles, singlefloat*i, singlefloat); i++; Buffer.BlockCopy(BitConverter.GetBytes(tLand), 0, throttles, singlefloat*i, singlefloat); i++; Buffer.BlockCopy(BitConverter.GetBytes(tWind), 0, throttles, singlefloat*i, singlefloat); i++; Buffer.BlockCopy(BitConverter.GetBytes(tCloud), 0, throttles, singlefloat*i, singlefloat); i++; Buffer.BlockCopy(BitConverter.GetBytes(tTask), 0, throttles, singlefloat*i, singlefloat); i++; Buffer.BlockCopy(BitConverter.GetBytes(tTexture), 0, throttles, singlefloat*i, singlefloat); i++; Buffer.BlockCopy(BitConverter.GetBytes(tAsset), 0, throttles, singlefloat*i, singlefloat); return throttles; } public void SetThrottleFromClient(byte[] throttle) { // From mantis http://opensimulator.org/mantis/view.php?id=1374 // it appears that sometimes we are receiving empty throttle byte arrays. // TODO: Investigate this behaviour if (throttle.Length == 0) { m_log.Warn("[PACKET QUEUE]: SetThrottleFromClient unexpectedly received a throttle byte array containing no elements!"); return; } int tResend = -1; int tLand = -1; int tWind = -1; int tCloud = -1; int tTask = -1; int tTexture = -1; int tAsset = -1; int tall = -1; int singlefloat = 4; //Agent Throttle Block contains 7 single floatingpoint values. int j = 0; // Some Systems may be big endian... // it might be smart to do this check more often... if (!BitConverter.IsLittleEndian) for (int i = 0; i < 7; i++) Array.Reverse(throttle, j + i*singlefloat, singlefloat); // values gotten from OpenMetaverse.org/wiki/Throttle. Thanks MW_ // bytes // Convert to integer, since.. the full fp space isn't used. tResend = (int) BitConverter.ToSingle(throttle, j); j += singlefloat; tLand = (int) BitConverter.ToSingle(throttle, j); j += singlefloat; tWind = (int) BitConverter.ToSingle(throttle, j); j += singlefloat; tCloud = (int) BitConverter.ToSingle(throttle, j); j += singlefloat; tTask = (int) BitConverter.ToSingle(throttle, j); j += singlefloat; tTexture = (int) BitConverter.ToSingle(throttle, j); j += singlefloat; tAsset = (int) BitConverter.ToSingle(throttle, j); tall = tResend + tLand + tWind + tCloud + tTask + tTexture + tAsset; /* m_log.Info("[CLIENT]: Client AgentThrottle - Got throttle:resendbits=" + tResend + " landbits=" + tLand + " windbits=" + tWind + " cloudbits=" + tCloud + " taskbits=" + tTask + " texturebits=" + tTexture + " Assetbits=" + tAsset + " Allbits=" + tall); */ // Total Sanity // Make sure that the client sent sane total values. // If the client didn't send acceptable values.... // Scale the clients values down until they are acceptable. if (tall <= TotalThrottle.Max) { ResendThrottle.Throttle = tResend; LandThrottle.Throttle = tLand; WindThrottle.Throttle = tWind; CloudThrottle.Throttle = tCloud; TaskThrottle.Throttle = tTask; TextureThrottle.Throttle = tTexture; AssetThrottle.Throttle = tAsset; TotalThrottle.Throttle = tall; } // else if (tall < 1) // { // // client is stupid, penalize him by minning everything // ResendThrottle.Throttle = ResendThrottle.Min; // LandThrottle.Throttle = LandThrottle.Min; // WindThrottle.Throttle = WindThrottle.Min; // CloudThrottle.Throttle = CloudThrottle.Min; // TaskThrottle.Throttle = TaskThrottle.Min; // TextureThrottle.Throttle = TextureThrottle.Min; // AssetThrottle.Throttle = AssetThrottle.Min; // TotalThrottle.Throttle = TotalThrottle.Min; // } else { // we're over so figure out percentages and use those ResendThrottle.Throttle = tResend; LandThrottle.Throttle = ScaleThrottle(tLand, tall, TotalThrottle.Max); WindThrottle.Throttle = ScaleThrottle(tWind, tall, TotalThrottle.Max); CloudThrottle.Throttle = ScaleThrottle(tCloud, tall, TotalThrottle.Max); TaskThrottle.Throttle = ScaleThrottle(tTask, tall, TotalThrottle.Max); TextureThrottle.Throttle = ScaleThrottle(tTexture, tall, TotalThrottle.Max); AssetThrottle.Throttle = ScaleThrottle(tAsset, tall, TotalThrottle.Max); TotalThrottle.Throttle = TotalThrottle.Max; } // effectively wiggling the slider causes things reset // ResetCounters(); // DO NOT reset, better to send less for one period than more } // See IPullStatsProvider public string GetStats() { return string.Format("{0,7} {1,7} {2,7} {3,7} {4,7} {5,7} {6,7} {7,7} {8,7} {9,7}", SendQueue.Count(), IncomingPacketQueue.Count, OutgoingPacketQueue.Count, ResendOutgoingPacketQueue.Count, LandOutgoingPacketQueue.Count, WindOutgoingPacketQueue.Count, CloudOutgoingPacketQueue.Count, TaskOutgoingPacketQueue.Count, TextureOutgoingPacketQueue.Count, AssetOutgoingPacketQueue.Count); } public LLQueItem[] GetQueueArray() { return SendQueue.GetQueueArray(); } } }