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* Change the OnQueueEmpty signature to send the flags of the queues that are empty instead of firing once per empty queue 

* Change the OnQueueEmpty firing to use a minimum time until next fire instead of a sleep
* Set OutgoingPacket.TickCount = 0 earlier to avoid extra resends when things are running slowly (inside a profiler, for example)
prioritization
John Hurliman 2009-10-21 18:03:41 -07:00
parent 4e04f6b3a5
commit 6492640e72
5 changed files with 120 additions and 61 deletions
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12
OpenSim/Framework/ThrottleOutPacketType.cs
View File

@ -51,4 +51,16 @@ namespace OpenSim.Framework
/// <remarks>This is a sub-category of Task</remarks>
State = 7,
}
[Flags]
public enum ThrottleOutPacketTypeFlags
{
Land = 1 << 0,
Wind = 1 << 1,
Cloud = 1 << 2,
Task = 1 << 3,
Texture = 1 << 4,
Asset = 1 << 5,
State = 1 << 6,
}
}

20
OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
View File

@ -3550,21 +3550,19 @@ namespace OpenSim.Region.ClientStack.LindenUDP
OutPacket(attach, ThrottleOutPacketType.Task);
}
void HandleQueueEmpty(ThrottleOutPacketType queue)
void HandleQueueEmpty(ThrottleOutPacketTypeFlags categories)
{
switch (queue)
if ((categories & ThrottleOutPacketTypeFlags.Task) != 0)
{
case ThrottleOutPacketType.Texture:
ProcessTextureRequests();
break;
case ThrottleOutPacketType.Task:
lock (m_avatarTerseUpdates.SyncRoot)
{
if (m_avatarTerseUpdates.Count > 0)
ProcessAvatarTerseUpdates();
}
break;
case ThrottleOutPacketType.State:
}
if ((categories & ThrottleOutPacketTypeFlags.State) != 0)
{
lock (m_primFullUpdates.SyncRoot)
{
if (m_primFullUpdates.Count > 0)
@ -3576,7 +3574,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
if (m_primTerseUpdates.Count > 0)
ProcessPrimTerseUpdates();
}
break;
}
if ((categories & ThrottleOutPacketTypeFlags.Texture) != 0)
{
ProcessTextureRequests();
}
}

108
OpenSim/Region/ClientStack/LindenUDP/LLUDPClient.cs
View File

@ -50,11 +50,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// are waiting on ACKs for</param>
public delegate void PacketStats(int inPackets, int outPackets, int unAckedBytes);
/// <summary>
/// Fired when the queue for a packet category is empty. This event can be
/// hooked to put more data on the empty queue
/// Fired when the queue for one or more packet categories is empty. This
/// event can be hooked to put more data on the empty queues
/// </summary>
/// <param name="category">Category of the packet queue that is empty</param>
public delegate void QueueEmpty(ThrottleOutPacketType category);
/// <param name="category">Categories of the packet queues that are empty</param>
public delegate void QueueEmpty(ThrottleOutPacketTypeFlags categories);
#endregion Delegates
@ -128,6 +128,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
private int m_packetsReceivedReported;
/// <summary>Total number of sent packets that we have reported to the OnPacketStats event(s)</summary>
private int m_packetsSentReported;
/// <summary>Holds the Environment.TickCount value of when the next OnQueueEmpty can be fired</summary>
private int m_nextOnQueueEmpty = 1;
/// <summary>Throttle bucket for this agent's connection</summary>
private readonly TokenBucket m_throttle;
@ -140,9 +142,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// <summary>A container that can hold one packet for each outbox, used to store
/// dequeued packets that are being held for throttling</summary>
private readonly OutgoingPacket[] m_nextPackets = new OutgoingPacket[THROTTLE_CATEGORY_COUNT];
/// <summary>Flags to prevent queue empty callbacks from stacking up on
/// top of each other</summary>
private readonly bool[] m_onQueueEmptyRunning = new bool[THROTTLE_CATEGORY_COUNT];
/// <summary>A reference to the LLUDPServer that is managing this client</summary>
private readonly LLUDPServer m_udpServer;
@ -405,6 +404,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
OpenSim.Framework.LocklessQueue<OutgoingPacket> queue;
TokenBucket bucket;
bool packetSent = false;
ThrottleOutPacketTypeFlags emptyCategories = 0;
//string queueDebugOutput = String.Empty; // Serious debug business
@ -452,17 +452,20 @@ namespace OpenSim.Region.ClientStack.LindenUDP
// empty callback now so it has a chance to fill before we
// get back here
if (queue.Count == 0)
BeginFireQueueEmpty(i);
emptyCategories |= CategoryToFlag(i);
}
else
{
// No packets in this queue. Fire the queue empty callback
// if it has not been called recently
BeginFireQueueEmpty(i);
emptyCategories |= CategoryToFlag(i);
}
}
}
if (emptyCategories != 0)
BeginFireQueueEmpty(emptyCategories);
//m_log.Info("[LLUDPCLIENT]: Queues: " + queueDebugOutput); // Serious debug business
return packetSent;
}
@ -509,49 +512,90 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// </summary>
/// <param name="throttleIndex">Throttle category to fire the callback
/// for</param>
private void BeginFireQueueEmpty(int throttleIndex)
private void BeginFireQueueEmpty(ThrottleOutPacketTypeFlags categories)
{
// Unknown is -1 and Resend is 0. Make sure we are only firing the
// callback for categories other than those
if (throttleIndex > 0)
if (m_nextOnQueueEmpty != 0 && (Environment.TickCount & Int32.MaxValue) >= m_nextOnQueueEmpty)
{
if (!m_onQueueEmptyRunning[throttleIndex])
{
m_onQueueEmptyRunning[throttleIndex] = true;
Util.FireAndForget(FireQueueEmpty, throttleIndex);
}
// Use a value of 0 to signal that FireQueueEmpty is running
m_nextOnQueueEmpty = 0;
// Asynchronously run the callback
Util.FireAndForget(FireQueueEmpty, categories);
}
}
/// <summary>
/// Checks to see if this queue empty callback is already running,
/// then firing the event
/// Fires the OnQueueEmpty callback and sets the minimum time that it
/// can be called again
/// </summary>
/// <param name="o">Throttle category to fire the callback for, stored
/// as an object to match the WaitCallback delegate signature</param>
/// <param name="o">Throttle categories to fire the callback for,
/// stored as an object to match the WaitCallback delegate
/// signature</param>
private void FireQueueEmpty(object o)
{
const int MIN_CALLBACK_MS = 30;
int i = (int)o;
ThrottleOutPacketType type = (ThrottleOutPacketType)i;
ThrottleOutPacketTypeFlags categories = (ThrottleOutPacketTypeFlags)o;
QueueEmpty callback = OnQueueEmpty;
int start = Environment.TickCount & Int32.MaxValue;
if (callback != null)
{
try { callback(type); }
catch (Exception e) { m_log.Error("[LLUDPCLIENT]: OnQueueEmpty(" + type + ") threw an exception: " + e.Message, e); }
try { callback(categories); }
catch (Exception e) { m_log.Error("[LLUDPCLIENT]: OnQueueEmpty(" + categories + ") threw an exception: " + e.Message, e); }
}
// Make sure all queue empty calls take at least some amount of time,
// otherwise we'll peg a CPU trying to fire these too fast
int elapsedMS = (Environment.TickCount & Int32.MaxValue) - start;
if (elapsedMS < MIN_CALLBACK_MS)
System.Threading.Thread.Sleep(MIN_CALLBACK_MS - elapsedMS);
m_nextOnQueueEmpty = start + MIN_CALLBACK_MS;
if (m_nextOnQueueEmpty == 0)
m_nextOnQueueEmpty = 1;
}
m_onQueueEmptyRunning[i] = false;
/// <summary>
/// Converts a <seealso cref="ThrottleOutPacketType"/> integer to a
/// flag value
/// </summary>
/// <param name="i">Throttle category to convert</param>
/// <returns>Flag representation of the throttle category</returns>
private static ThrottleOutPacketTypeFlags CategoryToFlag(int i)
{
ThrottleOutPacketType category = (ThrottleOutPacketType)i;
/*
* Land = 1,
/// <summary>Wind data</summary>
Wind = 2,
/// <summary>Cloud data</summary>
Cloud = 3,
/// <summary>Any packets that do not fit into the other throttles</summary>
Task = 4,
/// <summary>Texture assets</summary>
Texture = 5,
/// <summary>Non-texture assets</summary>
Asset = 6,
/// <summary>Avatar and primitive data</summary>
/// <remarks>This is a sub-category of Task</remarks>
State = 7,
*/
switch (category)
{
case ThrottleOutPacketType.Land:
return ThrottleOutPacketTypeFlags.Land;
case ThrottleOutPacketType.Wind:
return ThrottleOutPacketTypeFlags.Wind;
case ThrottleOutPacketType.Cloud:
return ThrottleOutPacketTypeFlags.Cloud;
case ThrottleOutPacketType.Task:
return ThrottleOutPacketTypeFlags.Task;
case ThrottleOutPacketType.Texture:
return ThrottleOutPacketTypeFlags.Texture;
case ThrottleOutPacketType.Asset:
return ThrottleOutPacketTypeFlags.Asset;
case ThrottleOutPacketType.State:
return ThrottleOutPacketTypeFlags.State;
default:
return 0;
}
}
}
}

4
OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
View File

@ -424,10 +424,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
outgoingPacket.Buffer.Data[0] = (byte)(outgoingPacket.Buffer.Data[0] | Helpers.MSG_RESENT);
outgoingPacket.Category = ThrottleOutPacketType.Resend;
// The TickCount will be set to the current time when the packet
// is actually sent out again
outgoingPacket.TickCount = 0;
// Bump up the resend count on this packet
Interlocked.Increment(ref outgoingPacket.ResendCount);
//Interlocked.Increment(ref Stats.ResentPackets);

5
OpenSim/Region/ClientStack/LindenUDP/UnackedPacketCollection.cs
View File

@ -123,6 +123,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
{
if (expiredPackets == null)
expiredPackets = new List<OutgoingPacket>();
// The TickCount will be set to the current time when the packet
// is actually sent out again
packet.TickCount = 0;
expiredPackets.Add(packet);
}
}