From 5ab5d7fe476e39452fc80465ea2506b7b9f7773e Mon Sep 17 00:00:00 2001
From: Justin Clark-Casey (justincc)
Date: Tue, 28 Oct 2014 00:44:03 +0000
Subject: Fix recent regression where adaptive throttles stopped adjusting.
Extends regression tests to test response of adaptive throttles to ack'ed and expired packets.
---
.../Region/ClientStack/Linden/UDP/LLUDPClient.cs | 34 +++++++++---------
.../ClientStack/Linden/UDP/Tests/ThrottleTests.cs | 42 ++++++++++++++--------
.../Region/ClientStack/Linden/UDP/TokenBucket.cs | 34 +++++++++---------
3 files changed, 61 insertions(+), 49 deletions(-)
(limited to 'OpenSim/Region/ClientStack')
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
index c768662..b70d861 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
@@ -447,31 +447,29 @@ namespace OpenSim.Region.ClientStack.LindenUDP
long total = resend + land + wind + cloud + task + texture + asset;
m_throttleClient.TargetDripRate = total;
}
- else
- {
- TokenBucket bucket;
- bucket = m_throttleCategories[(int)ThrottleOutPacketType.Resend];
- bucket.RequestedDripRate = resend;
+ TokenBucket bucket;
- bucket = m_throttleCategories[(int)ThrottleOutPacketType.Land];
- bucket.RequestedDripRate = land;
+ bucket = m_throttleCategories[(int)ThrottleOutPacketType.Resend];
+ bucket.RequestedDripRate = resend;
- bucket = m_throttleCategories[(int)ThrottleOutPacketType.Wind];
- bucket.RequestedDripRate = wind;
+ bucket = m_throttleCategories[(int)ThrottleOutPacketType.Land];
+ bucket.RequestedDripRate = land;
- bucket = m_throttleCategories[(int)ThrottleOutPacketType.Cloud];
- bucket.RequestedDripRate = cloud;
+ bucket = m_throttleCategories[(int)ThrottleOutPacketType.Wind];
+ bucket.RequestedDripRate = wind;
- bucket = m_throttleCategories[(int)ThrottleOutPacketType.Asset];
- bucket.RequestedDripRate = asset;
+ bucket = m_throttleCategories[(int)ThrottleOutPacketType.Cloud];
+ bucket.RequestedDripRate = cloud;
- bucket = m_throttleCategories[(int)ThrottleOutPacketType.Task];
- bucket.RequestedDripRate = task;
+ bucket = m_throttleCategories[(int)ThrottleOutPacketType.Asset];
+ bucket.RequestedDripRate = asset;
- bucket = m_throttleCategories[(int)ThrottleOutPacketType.Texture];
- bucket.RequestedDripRate = texture;
- }
+ bucket = m_throttleCategories[(int)ThrottleOutPacketType.Task];
+ bucket.RequestedDripRate = task;
+
+ bucket = m_throttleCategories[(int)ThrottleOutPacketType.Texture];
+ bucket.RequestedDripRate = texture;
// Reset the packed throttles cached data
m_packedThrottles = null;
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/Tests/ThrottleTests.cs b/OpenSim/Region/ClientStack/Linden/UDP/Tests/ThrottleTests.cs
index 912c994..0560b9b 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/Tests/ThrottleTests.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/Tests/ThrottleTests.cs
@@ -184,7 +184,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
udpServer.Throttle.DebugLevel = 1;
udpClient.ThrottleDebugLevel = 1;
- // Total is 28000
+ // Total is 280000
int resendBytes = 10000;
int landBytes = 20000;
int windBytes = 30000;
@@ -192,24 +192,38 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
int taskBytes = 50000;
int textureBytes = 60000;
int assetBytes = 70000;
+ int totalBytes = resendBytes + landBytes + windBytes + cloudBytes + taskBytes + textureBytes + assetBytes;
SetThrottles(
udpClient, resendBytes, landBytes, windBytes, cloudBytes, taskBytes, textureBytes, assetBytes);
- // We expect individual throttle changes to currently have no effect under adaptive, since this is managed
- // purely by that throttle. However, we expect the max to change.
- // XXX: At the moment we check against defaults, but at some point there should be a better test to
- // active see change over time.
- ThrottleRates defaultRates = udpServer.ThrottleRates;
+ // Ratio of current adaptive drip rate to requested bytes
+ // XXX: Should hard code this as below so we don't rely on values given by tested code to construct
+ // expected values.
+ double commitRatio = (double)udpClient.FlowThrottle.AdjustedDripRate / udpClient.FlowThrottle.TargetDripRate;
+
+ AssertThrottles(
+ udpClient,
+ LLUDPServer.MTU, landBytes * commitRatio, windBytes * commitRatio, cloudBytes * commitRatio, taskBytes * commitRatio,
+ textureBytes * commitRatio, assetBytes * commitRatio, udpClient.FlowThrottle.AdjustedDripRate, totalBytes, 0);
+
+ // Test an increase in target throttle
+ udpClient.FlowThrottle.AcknowledgePackets(35000);
+ commitRatio = 0.2;
+
+ AssertThrottles(
+ udpClient,
+ resendBytes * commitRatio, landBytes * commitRatio, windBytes * commitRatio, cloudBytes * commitRatio, taskBytes * commitRatio,
+ textureBytes * commitRatio, assetBytes * commitRatio, udpClient.FlowThrottle.AdjustedDripRate, totalBytes, 0);
- // Current total is 66750
- int totalBytes = defaultRates.Resend + defaultRates.Land + defaultRates.Wind + defaultRates.Cloud + defaultRates.Task + defaultRates.Texture + defaultRates.Asset;
- int totalMaxBytes = resendBytes + landBytes + windBytes + cloudBytes + taskBytes + textureBytes + assetBytes;
+ // Test a decrease in target throttle
+ udpClient.FlowThrottle.ExpirePackets(1);
+ commitRatio = 0.1;
AssertThrottles(
udpClient,
- defaultRates.Resend, defaultRates.Land, defaultRates.Wind, defaultRates.Cloud, defaultRates.Task,
- defaultRates.Texture, defaultRates.Asset, totalBytes, totalMaxBytes, 0);
+ LLUDPServer.MTU, landBytes * commitRatio, windBytes * commitRatio, cloudBytes * commitRatio, taskBytes * commitRatio,
+ textureBytes * commitRatio, assetBytes * commitRatio, udpClient.FlowThrottle.AdjustedDripRate, totalBytes, 0);
}
///
@@ -376,9 +390,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
{
ClientInfo ci = udpClient.GetClientInfo();
- // Console.WriteLine(
- // "Resend={0}, Land={1}, Wind={2}, Cloud={3}, Task={4}, Texture={5}, Asset={6}, TOTAL = {7}",
- // ci.resendThrottle, ci.landThrottle, ci.windThrottle, ci.cloudThrottle, ci.taskThrottle, ci.textureThrottle, ci.assetThrottle, ci.totalThrottle);
+// Console.WriteLine(
+// "Resend={0}, Land={1}, Wind={2}, Cloud={3}, Task={4}, Texture={5}, Asset={6}, TOTAL = {7}",
+// ci.resendThrottle, ci.landThrottle, ci.windThrottle, ci.cloudThrottle, ci.taskThrottle, ci.textureThrottle, ci.assetThrottle, ci.totalThrottle);
Assert.AreEqual((int)resendBytes, ci.resendThrottle, "Resend");
Assert.AreEqual((int)landBytes, ci.landThrottle, "Land");
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/TokenBucket.cs b/OpenSim/Region/ClientStack/Linden/UDP/TokenBucket.cs
index ab8d268..d215595 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/TokenBucket.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/TokenBucket.cs
@@ -76,8 +76,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// Map of children buckets and their requested maximum burst rate
///
protected Dictionary m_children = new Dictionary();
-
-#region Properties
///
/// The parent bucket of this bucket, or null if this bucket has no
@@ -123,7 +121,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// RequestedDripRate is set to 0. Really, this should always return m_dripRate and then we can get
/// (m_dripRate == 0 ? TotalDripRequest : m_dripRate) on some other properties.
///
- protected Int64 m_dripRate;
public virtual Int64 RequestedDripRate
{
get { return (m_dripRate == 0 ? TotalDripRequest : m_dripRate); }
@@ -179,6 +176,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return (Int64)rate;
}
}
+ protected Int64 m_dripRate;
//
// The maximum rate for flow control. Drip rate can never be greater than this.
@@ -189,10 +187,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// The current total of the requested maximum burst rates of children buckets.
///
public Int64 TotalDripRequest { get; protected set; }
-
-#endregion Properties
-
-#region Constructor
///
/// Default constructor
@@ -200,20 +194,20 @@ namespace OpenSim.Region.ClientStack.LindenUDP
/// Identifier for this token bucket
/// Parent bucket if this is a child bucket, or
/// null if this is a root bucket
- /// Rate that the bucket fills, in bytes per
- /// second. If zero, the bucket always remains full
- public TokenBucket(string identifier, TokenBucket parent, Int64 dripRate, Int64 maxDripRate)
+ ///
+ /// Requested rate that the bucket fills, in bytes per
+ /// second. If zero, the bucket always remains full.
+ ///
+ public TokenBucket(string identifier, TokenBucket parent, Int64 requestedDripRate, Int64 maxDripRate)
{
Identifier = identifier;
Parent = parent;
- RequestedDripRate = dripRate;
+ RequestedDripRate = requestedDripRate;
MaxDripRate = maxDripRate;
m_lastDrip = Util.EnvironmentTickCount();
}
-#endregion Constructor
-
///
/// Compute a modifier for the MaxBurst rate. This is 1.0, meaning
/// no modification if the requested bandwidth is less than the
@@ -374,7 +368,10 @@ namespace OpenSim.Region.ClientStack.LindenUDP
public Int64 TargetDripRate
{
get { return m_targetDripRate; }
- set { m_targetDripRate = Math.Max(0, value); }
+ set
+ {
+ m_targetDripRate = Math.Max(value, m_minimumFlow);
+ }
}
protected Int64 m_targetDripRate;
@@ -384,9 +381,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
public virtual Int64 AdjustedDripRate
{
get { return m_dripRate; }
- set {
+ set
+ {
m_dripRate = OpenSim.Framework.Util.Clamp(value, m_minimumFlow, TargetDripRate);
m_burstRate = (Int64)((double)m_dripRate * m_quantumsPerBurst);
+
if (Parent != null)
Parent.RegisterRequest(this, m_dripRate);
}
@@ -399,14 +398,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
///
protected const Int64 m_minimumFlow = m_minimumDripRate * 15;
- public AdaptiveTokenBucket(string identifier, TokenBucket parent, Int64 dripRate, Int64 maxDripRate, bool enabled)
- : base(identifier, parent, dripRate, maxDripRate)
+ public AdaptiveTokenBucket(string identifier, TokenBucket parent, Int64 requestedDripRate, Int64 maxDripRate, bool enabled)
+ : base(identifier, parent, requestedDripRate, maxDripRate)
{
AdaptiveEnabled = enabled;
if (AdaptiveEnabled)
{
// m_log.DebugFormat("[TOKENBUCKET]: Adaptive throttle enabled");
+ TargetDripRate = m_minimumFlow;
AdjustedDripRate = m_minimumFlow;
}
}
--
cgit v1.1