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Added the command line argument -usehrt to enable high resolution timing on supported platforms (QueryPerformanceCounter)

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Timing will fallback to DateTime.UtcNow.Ticks when QPC is unsupported.
This commit is contained in:
Mark Sturgill 2014-02-09 12:10:13 -07:00
parent 473751297d
commit a5b7e6c78c
1 changed files with 16 additions and 7 deletions
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21
Server/Main.cs
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@ -129,18 +129,22 @@ namespace Server
private static readonly bool _HighRes = Stopwatch.IsHighResolution; private static readonly bool _HighRes = Stopwatch.IsHighResolution;
private static readonly double _Frequency = 1000.0 / Stopwatch.Frequency; private static readonly double _Frequency = 1000.0 / Stopwatch.Frequency;
private static bool _UseHRT;
public static bool UsingHighResolutionTiming { get { return _UseHRT && _HighRes && !m_Unix; } }
public static long TickCount { public static long TickCount {
get { get {
long t = 0;
#if !MONO #if !MONO
// TODO: Unreliable with certain system configurations. if (_UseHRT && _HighRes)
if (_HighRes) {
long t = 0;
SafeNativeMethods.QueryPerformanceCounter(out t); SafeNativeMethods.QueryPerformanceCounter(out t);
return (long)((double)t * _Frequency);
}
else else
#endif #endif
t = DateTime.UtcNow.Ticks; return (long)((double)DateTime.UtcNow.Ticks * 0.0001);
return (long)((double)t * _Frequency);
/* We don't really need this, but it may be useful in the future. /* We don't really need this, but it may be useful in the future.
uint t = (uint)Environment.TickCount; uint t = (uint)Environment.TickCount;
@ -450,6 +454,8 @@ namespace Server
m_HaltOnWarning = true; m_HaltOnWarning = true;
else if ( Insensitive.Equals( args[i], "-vb" ) ) else if ( Insensitive.Equals( args[i], "-vb" ) )
m_VBdotNET = true; m_VBdotNET = true;
else if (Insensitive.Equals(args[i], "-usehrt"))
_UseHRT = true;
} }
try try
@ -516,6 +522,9 @@ namespace Server
if ( GCSettings.IsServerGC ) if ( GCSettings.IsServerGC )
Console.WriteLine("Core: Server garbage collection mode enabled"); Console.WriteLine("Core: Server garbage collection mode enabled");
if (_UseHRT)
Console.WriteLine("Core: Requested high resolution timing ({0})", UsingHighResolutionTiming ? "Supported" : "Unsupported");
Console.WriteLine("RandomImpl: {0} ({1})", RandomImpl.Type.Name, RandomImpl.IsHardwareRNG ? "Hardware" : "Software"); Console.WriteLine("RandomImpl: {0} ({1})", RandomImpl.Type.Name, RandomImpl.IsHardwareRNG ? "Hardware" : "Software");
while( !ScriptCompiler.Compile( m_Debug, m_Cache ) ) while( !ScriptCompiler.Compile( m_Debug, m_Cache ) )