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Add experimental OutgoingQueueRefillEngine to handle queue refill processing on a controlled number of threads rather than the threadpool.

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Disabled by default.  Currently can only be enabled with console "debug lludp oqre start" command, though this can be started and stopped whilst simulator is running.
When a connection requires packet queue refill processing (used to populate queues with entity updates, entity prop updates and image queue updates), this is done via Threadpool requests.
However, with a very high number of connections (e.g. 100 root + 300 child) a very large number of simultaneous requests may be causing performance issues.
This commit adds an experimental engine for processing these requests from a queue with a persistent thread instead.
Unlike inbound processing, there are no network requests in this processing that might hold the thread up for a long time.
Early implementation - currently only one thread which may (or may not) get overloaded with requests.  Added for testing purposes.
This commit is contained in:
Justin Clark-Casey (justincc)
2014-08-19 00:11:04 +01:00
parent b375f86f11
commit 84cea46c10
3 changed files with 288 additions and 5 deletions
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13
OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
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@@ -355,6 +355,13 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// </summary>
private IClientAPI m_currentIncomingClient;
/// <summary>
/// Experimental facility to run queue empty processing within a controlled number of threads rather than
/// requiring massive numbers of short-lived threads from the threadpool when there are a high number of
/// connections.
/// </summary>
public OutgoingQueueRefillEngine OqrEngine { get; private set; }
public LLUDPServer(
IPAddress listenIP, ref uint port, int proxyPortOffsetParm, bool allow_alternate_port,
IConfigSource configSource, AgentCircuitManager circuitManager)
@@ -432,6 +439,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
if (usePools)
EnablePools();
OqrEngine = new OutgoingQueueRefillEngine(this);
}
public void Start()
@@ -469,7 +478,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
Watchdog.StartThread(
OutgoingPacketHandler,
string.Format("Outgoing Packets ({0})", Scene.RegionInfo.RegionName),
string.Format("Outgoing Packets ({0})", Scene.Name),
ThreadPriority.Normal,
false,
true,
@@ -479,7 +488,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
public void Stop()
{
m_log.Info("[LLUDPSERVER]: Shutting down the LLUDP server for " + Scene.RegionInfo.RegionName);
m_log.Info("[LLUDPSERVER]: Shutting down the LLUDP server for " + Scene.Name);
base.StopOutbound();
base.StopInbound();
}