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Implements adaptive queue management and fair queueing for

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improved networking performance.

Reprioritization algorithms need to be ported still. One is
in place.
This commit is contained in:
Mic Bowman
2011-03-28 10:00:53 -07:00
parent 707b6673c9
commit 77cf9405de
2 changed files with 307 additions and 123 deletions
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71
OpenSim/Region/Framework/Scenes/Prioritizer.cs
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@@ -58,7 +58,7 @@ namespace OpenSim.Region.Framework.Scenes
public class Prioritizer
{
// private static readonly ILog m_log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
private static readonly ILog m_log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// This is added to the priority of all child prims, to make sure that the root prim update is sent to the
@@ -76,7 +76,74 @@ namespace OpenSim.Region.Framework.Scenes
m_scene = scene;
}
public double GetUpdatePriority(IClientAPI client, ISceneEntity entity)
//<mic>
public uint GetUpdatePriority(IClientAPI client, ISceneEntity entity)
{
if (entity == null)
{
m_log.WarnFormat("[PRIORITIZER] attempt to prioritize null entity");
throw new InvalidOperationException("Prioritization entity not defined");
}
// If this is an update for our own avatar give it the highest priority
if (client.AgentId == entity.UUID)
return 0;
// Get this agent's position
ScenePresence presence = m_scene.GetScenePresence(client.AgentId);
if (presence == null)
{
m_log.WarnFormat("[PRIORITIZER] attempt to prioritize agent no longer in the scene");
throw new InvalidOperationException("Prioritization agent not defined");
}
// Use group position for child prims
Vector3 entityPos = entity.AbsolutePosition;
if (entity is SceneObjectPart)
{
SceneObjectGroup group = (entity as SceneObjectPart).ParentGroup;
if (group != null)
entityPos = group.AbsolutePosition;
}
// Use the camera position for local agents and avatar position for remote agents
Vector3 presencePos = (presence.IsChildAgent) ?
presence.AbsolutePosition :
presence.CameraPosition;
// Compute the distance...
double distance = Vector3.Distance(presencePos, entityPos);
// And convert the distance to a priority queue, this computation gives queues
// at 10, 20, 40, 80, 160, 320, 640, and 1280m
uint pqueue = 1;
for (int i = 0; i < 8; i++)
{
if (distance < 10 * Math.Pow(2.0,i))
break;
pqueue++;
}
// If this is a root agent, then determine front & back
// Bump up the priority queue for any objects behind the avatar
if (! presence.IsChildAgent)
{
// Root agent, decrease priority for objects behind us
Vector3 camPosition = presence.CameraPosition;
Vector3 camAtAxis = presence.CameraAtAxis;
// Plane equation
float d = -Vector3.Dot(camPosition, camAtAxis);
float p = Vector3.Dot(camAtAxis, entityPos) + d;
if (p < 0.0f)
pqueue++;
}
return pqueue;
}
//</mic>
public double bGetUpdatePriority(IClientAPI client, ISceneEntity entity)
{
double priority = 0;