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In Watchdog, add ability to specific timeout for a thread. 

This also changes the point of registration to the StartThread() call rather than the first Update()
remove-scene-viewer
Justin Clark-Casey (justincc) 2011-10-25 23:16:01 +01:00
parent e549f2f443
commit 182908d216
1 changed files with 56 additions and 16 deletions
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72
OpenSim/Framework/Watchdog.cs
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@ -40,18 +40,30 @@ namespace OpenSim.Framework
{
/// <summary>Timer interval in milliseconds for the watchdog timer</summary>
const double WATCHDOG_INTERVAL_MS = 2500.0d;
/// <summary>Maximum timeout in milliseconds before a thread is considered dead</summary>
const int WATCHDOG_TIMEOUT_MS = 5000;
[System.Diagnostics.DebuggerDisplay("{Thread.Name}")]
public class ThreadWatchdogInfo
{
public Thread Thread;
public int LastTick;
public Thread Thread { get; private set; }
public int LastTick { get; set; }
public ThreadWatchdogInfo(Thread thread)
/// <summary>
/// Number of seconds before we notify that the thread is having a problem.
/// </summary>
public int Timeout { get; set; }
/// <summary>
/// Is this thread considered timed out?
/// </summary>
public bool IsTimedOut { get; set; }
public ThreadWatchdogInfo(Thread thread, int timeout)
{
Thread = thread;
Timeout = timeout;
LastTick = Environment.TickCount & Int32.MaxValue;
}
}
@ -82,7 +94,7 @@ namespace OpenSim.Framework
}
/// <summary>
/// Start a new thread that is tracked by the watchdog timer
/// Start a new thread that is tracked by the watchdog timer.
/// </summary>
/// <param name="start">The method that will be executed in a new thread</param>
/// <param name="name">A name to give to the new thread</param>
@ -91,6 +103,24 @@ namespace OpenSim.Framework
/// thread, otherwise false</param>
/// <returns>The newly created Thread object</returns>
public static Thread StartThread(ThreadStart start, string name, ThreadPriority priority, bool isBackground)
{
return StartThread(start, name, priority, isBackground, WATCHDOG_TIMEOUT_MS);
}
/// <summary>
/// Start a new thread that is tracked by the watchdog timer
/// </summary>
/// <param name="start">The method that will be executed in a new thread</param>
/// <param name="name">A name to give to the new thread</param>
/// <param name="priority">Priority to run the thread at</param>
/// <param name="isBackground">True to run this thread as a background
/// thread, otherwise false</param>
/// <param name="timeout">
/// Number of seconds to wait until we issue a warning about timeout.
/// </para>
/// <returns>The newly created Thread object</returns>
public static Thread StartThread(
ThreadStart start, string name, ThreadPriority priority, bool isBackground, int timeout)
{
Thread thread = new Thread(start);
thread.Name = name;
@ -98,6 +128,13 @@ namespace OpenSim.Framework
thread.IsBackground = isBackground;
thread.Start();
ThreadWatchdogInfo twi = new ThreadWatchdogInfo(thread, timeout);
m_log.Debug("[WATCHDOG]: Started tracking thread \"" + twi.Thread.Name + "\" (ID " + twi.Thread.ManagedThreadId + ")");
lock (m_threads)
m_threads.Add(twi.Thread.ManagedThreadId, twi);
return thread;
}
@ -121,14 +158,6 @@ namespace OpenSim.Framework
return RemoveThread(Thread.CurrentThread.ManagedThreadId);
}
private static void AddThread(ThreadWatchdogInfo threadInfo)
{
m_log.Debug("[WATCHDOG]: Started tracking thread \"" + threadInfo.Thread.Name + "\" (ID " + threadInfo.Thread.ManagedThreadId + ")");
lock (m_threads)
m_threads.Add(threadInfo.Thread.ManagedThreadId, threadInfo);
}
private static bool RemoveThread(int threadID)
{
lock (m_threads)
@ -165,9 +194,14 @@ namespace OpenSim.Framework
try
{
if (m_threads.TryGetValue(threadID, out threadInfo))
{
threadInfo.LastTick = Environment.TickCount & Int32.MaxValue;
threadInfo.IsTimedOut = false;
}
else
AddThread(new ThreadWatchdogInfo(Thread.CurrentThread));
{
m_log.WarnFormat("[WATCHDOG]: Asked to update thread {0} which is not being monitored", threadID);
}
}
catch { }
}
@ -196,10 +230,16 @@ namespace OpenSim.Framework
foreach (ThreadWatchdogInfo threadInfo in m_threads.Values)
{
if (threadInfo.Thread.ThreadState == ThreadState.Stopped || now - threadInfo.LastTick >= WATCHDOG_TIMEOUT_MS)
if (threadInfo.Thread.ThreadState == ThreadState.Stopped)
{
timedOut = threadInfo;
m_threads.Remove(threadInfo.Thread.ManagedThreadId);
RemoveThread(threadInfo.Thread.ManagedThreadId);
break;
}
else if (!threadInfo.IsTimedOut && now - threadInfo.LastTick >= threadInfo.Timeout)
{
threadInfo.IsTimedOut = true;
timedOut = threadInfo;
break;
}
}
@ -212,4 +252,4 @@ namespace OpenSim.Framework
m_watchdogTimer.Start();
}
}
}
}