From a3bed1fbcbcbe19681aa57733f260ef647a33d8e Mon Sep 17 00:00:00 2001
From: Oren Hurvitz
Date: Mon, 27 Jul 2015 12:16:21 +0300
Subject: Report "Script Execution Time" as the time spent executing the script
 in the last 30 seconds. Use a sliding window to calculate this.

Notes:
- This metric provides a better indication of which scripts are taking up a lot of CPU (and therefore should be optimized).
- Previously the execution time was reset to 0 in every new measurement period, causing the reported time to fluctuate for no reason. This has been fixed by using a sliding window.
---
 .../ScriptEngine/Shared/Instance/ScriptInstance.cs | 29 +++++++++-------------
 1 file changed, 12 insertions(+), 17 deletions(-)

(limited to 'OpenSim/Region/ScriptEngine/Shared/Instance')

diff --git a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
index 05dea5d..d8ad62c 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
@@ -199,11 +199,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
 
         public DateTime TimeStarted { get; private set; }
 
-        public long MeasurementPeriodTickStart { get; private set; }
+        public MetricsCollectorTime ExecutionTime { get; private set; }
 
-        public long MeasurementPeriodExecutionTime { get; private set; }
-
-        public static readonly int MaxMeasurementPeriod = 30 * 1000;   // show the *recent* time used by the script, to find currently active scripts
+        private static readonly int MeasurementWindow = 30 * 1000;   // show the *recent* time used by the script, to find currently active scripts
 
         private bool m_coopTermination;
  
@@ -246,6 +244,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
 
             m_SaveState = StatePersistedHere;
 
+            ExecutionTime = new MetricsCollectorTime(MeasurementWindow, 10);
+
 //            m_log.DebugFormat(
 //                "[SCRIPT INSTANCE]: Instantiated script instance {0} (id {1}) in part {2} (id {3}) in object {4} attached avatar {5} in {6}",
 //                ScriptTask.Name, ScriptTask.ItemID, Part.Name, Part.UUID, Part.ParentGroup.Name, m_AttachedAvatar, Engine.World.Name);
@@ -505,8 +505,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
                 Running = true;
 
                 TimeStarted = DateTime.Now;
-                MeasurementPeriodTickStart = Util.EnvironmentTickCount();
-                MeasurementPeriodExecutionTime = 0;
+
+                // Note: we don't reset ExecutionTime. The reason is that runaway scripts are stopped and restarted
+                // automatically, and we *do* want to show that they had high CPU in that case. If we had reset
+                // ExecutionTime here then runaway scripts, paradoxically, would never show up in the "Top Scripts" dialog.
 
                 if (EventQueue.Count > 0)
                 {
@@ -832,20 +834,13 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
                             m_EventStart = DateTime.Now;
                             m_InEvent = true;
 
-                            // Reset the measurement period when we reach the end of the current one.
-                            if (Util.EnvironmentTickCountSubtract((int)MeasurementPeriodTickStart) > MaxMeasurementPeriod)
-                            {
-                                MeasurementPeriodTickStart = Util.EnvironmentTickCount();
-                                MeasurementPeriodExecutionTime = 0;
-                            }
+                            Stopwatch timer = new Stopwatch();
+                            timer.Start();
 
-                            Stopwatch executionTime = new Stopwatch();
-                            executionTime.Start();
-                            
                             m_Script.ExecuteEvent(State, data.EventName, data.Params);
 
-                            executionTime.Stop();
-                            MeasurementPeriodExecutionTime += executionTime.ElapsedMilliseconds;
+                            timer.Stop();
+                            ExecutionTime.AddSample(timer);
 
                             m_InEvent = false;
                             m_CurrentEvent = String.Empty;
-- 
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