class/System/System.Diagnostics/CounterSampleCalculator.cs

   1 //
   2 // System.Diagnostics.CounterSampleCalculator.cs
   3 //
   4 // Authors:
   5 //   Jonathan Pryor (jonpryor@vt.edu)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) 2002
   9 // (C) 2003 Andreas Nahr
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34
  35 namespace System.Diagnostics {
  36
  37 #if NET_2_0
  38         public static class CounterSampleCalculator {
  39 #else
  40         public sealed class CounterSampleCalculator {
  41
  42                 private CounterSampleCalculator ()
  43                 {
  44                 }
  45 #endif
  46
  47                 public static float ComputeCounterValue (CounterSample newSample)
  48                 {
  49                         switch (newSample.CounterType) {
  50                         case PerformanceCounterType.RawFraction:
  51                         case PerformanceCounterType.NumberOfItems32:
  52                         case PerformanceCounterType.NumberOfItemsHEX32:
  53                         case PerformanceCounterType.NumberOfItems64:
  54                         case PerformanceCounterType.NumberOfItemsHEX64:
  55                                 return (float)newSample.RawValue;
  56                         default:
  57                                 return 0;
  58                         }
  59                 }
  60
  61                 [MonoTODO("What's the algorithm?")]
  62                 public static float ComputeCounterValue (CounterSample oldSample,
  63                         CounterSample newSample)
  64                 {
  65                         if (newSample.CounterType != oldSample.CounterType)
  66                                 throw new Exception ("The counter samples must be of the same type");
  67                         switch (newSample.CounterType) {
  68                         case PerformanceCounterType.RawFraction:
  69                         case PerformanceCounterType.NumberOfItems32:
  70                         case PerformanceCounterType.NumberOfItemsHEX32:
  71                         case PerformanceCounterType.NumberOfItems64:
  72                         case PerformanceCounterType.NumberOfItemsHEX64:
  73                                 return (float)newSample.RawValue;
  74                         case PerformanceCounterType.AverageCount64:
  75                                 return (float)(newSample.RawValue - oldSample.RawValue)/(float)(newSample.BaseValue - oldSample.BaseValue);
  76                         case PerformanceCounterType.AverageTimer32:
  77                                 return (((float)(newSample.RawValue - oldSample.RawValue))/newSample.SystemFrequency)/(float)(newSample.BaseValue - oldSample.BaseValue);
  78                         case PerformanceCounterType.CounterDelta32:
  79                         case PerformanceCounterType.CounterDelta64:
  80                                 return (float)(newSample.RawValue - oldSample.RawValue);
  81                         case PerformanceCounterType.CounterMultiTimer:
  82                                 return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp) * 100.0f/newSample.BaseValue;
  83                         case PerformanceCounterType.CounterMultiTimer100Ns:
  84                                 return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec) * 100.0f/newSample.BaseValue;
  85                         case PerformanceCounterType.CounterMultiTimerInverse:
  86                                 return (newSample.BaseValue - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp)) * 100.0f;
  87                         case PerformanceCounterType.CounterMultiTimer100NsInverse:
  88                                 return (newSample.BaseValue - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec)) * 100.0f;
  89                         case PerformanceCounterType.CounterTimer:
  90                         case PerformanceCounterType.CountPerTimeInterval32:
  91                         case PerformanceCounterType.CountPerTimeInterval64:
  92                                 return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp);
  93                         case PerformanceCounterType.CounterTimerInverse:
  94                                 return (1.0f - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec)) * 100.0f;
  95                         case PerformanceCounterType.ElapsedTime:
  96                                 // FIXME
  97                                 return 0;
  98                         case PerformanceCounterType.Timer100Ns:
  99                                 return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp) * 100.0f;
 100                         case PerformanceCounterType.Timer100NsInverse:
 101                                 return (1f - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp)) * 100.0f;
 102                         case PerformanceCounterType.RateOfCountsPerSecond32:
 103                         case PerformanceCounterType.RateOfCountsPerSecond64:
 104                                 return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp) * 10000000;
 105                         default:
 106                                 Console.WriteLine ("Counter type {0} not handled", newSample.CounterType);
 107                                 return 0;
 108                         }
 109                 }
 110         }
 111 }
 112