/// <summary>
/// Converts 100NS elapsed time to fractional seconds
/// </summary>
/// <internalonly/>
private static float GetElapsedTime(CounterSample oldSample, CounterSample newSample)
{
float eSeconds;
float eDifference;
if (newSample.RawValue == 0)
{
// no data [start time = 0] so return 0
return(0.0f);
}
else
{
float eFreq;
eFreq = (float)(ulong)oldSample.CounterFrequency;
if (oldSample.UnsignedRawValue >= (ulong)newSample.CounterTimeStamp || eFreq <= 0.0f)
{
return(0.0f);
}
// otherwise compute difference between current time and start time
eDifference = (float)((ulong)newSample.CounterTimeStamp - oldSample.UnsignedRawValue);
// convert to fractional seconds using object counter
eSeconds = eDifference / eFreq;
return(eSeconds);
}
}
public static Double Calculate(CounterSample oldSample, CounterSample newSample)
{
double difference = newSample.RawValue - oldSample.RawValue;
double timeInterval = newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec;
if (timeInterval != 0) return 100 * (1 - (difference / timeInterval));
return 0;
}
/// <summary>
/// Frees all the resources allocated by this counter
/// </summary>
public void Close()
{
_helpMsg = null;
_oldSample = CounterSample.Empty;
_sharedCounter = null;
_initialized = false;
_counterType = -1;
}
public CounterData(CounterKey key, Color color)
{
Key = key;
Color = color;
_previousSample = CounterSample.Empty;
Id = Interlocked.Increment(ref _globalId);
}
public void Close()
{
this.helpMsg = null;
this.oldSample = CounterSample.Empty;
this.sharedCounter = null;
this.initialized = false;
this.counterType = -1;
}
public float NextValue()
{
CounterSample nextCounterSample = this.NextSample();
float num = 0f;
num = CounterSample.Calculate(this.oldSample, nextCounterSample);
this.oldSample = nextCounterSample;
return(num);
}
/// Returns this process's CPU utilization since the last call to ResetCounter().
public float GetCpuUtilization()
{
if (_cnt == null)
return float.NaN;
CounterSample curr = _cnt.NextSample();
float cpuutil = CounterSample.Calculate(_prevSample, curr);
_prevSample = curr;
return cpuutil;
}
public static Double CalculateCpu(CounterSample oldSample, CounterSample newSample, int rounding)
{
double difference = newSample.RawValue - oldSample.RawValue;
double timeInterval = newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec;
if (timeInterval == 0) return 0;
var division = (difference/timeInterval)-1;
if (division > 1) return 100;
if (division < 0) return 0;
return Math.Round(100 * (1 - (difference / timeInterval)), rounding);
}
/// <summary>
/// Computes the calculated value given a raw counter sample.
/// </summary>
public static float ComputeCounterValue(CounterSample oldSample, CounterSample newSample)
{
int newCounterType = (int)newSample.CounterType;
if (oldSample.SystemFrequency == 0)
{
if ((newCounterType != Interop.Kernel32.PerformanceCounterOptions.PERF_RAW_FRACTION) &&
(newCounterType != Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_RAWCOUNT) &&
(newCounterType != Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_RAWCOUNT_HEX) &&
(newCounterType != Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_LARGE_RAWCOUNT) &&
(newCounterType != Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_LARGE_RAWCOUNT_HEX) &&
(newCounterType != Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_MULTI_BASE))
{
// Since oldSample has a system frequency of 0, this means the newSample is the first sample
// on a two sample calculation. Since we can't do anything with it, return 0.
return(0.0f);
}
}
else if (oldSample.CounterType != newSample.CounterType)
{
throw new InvalidOperationException(SR.MismatchedCounterTypes);
}
if (newCounterType == Interop.Kernel32.PerformanceCounterOptions.PERF_ELAPSED_TIME)
{
return((float)GetElapsedTime(oldSample, newSample));
}
Interop.Kernel32.PerformanceCounterOptions.PDH_RAW_COUNTER newPdhValue = new Interop.Kernel32.PerformanceCounterOptions.PDH_RAW_COUNTER();
Interop.Kernel32.PerformanceCounterOptions.PDH_RAW_COUNTER oldPdhValue = new Interop.Kernel32.PerformanceCounterOptions.PDH_RAW_COUNTER();
FillInValues(oldSample, newSample, ref oldPdhValue, ref newPdhValue);
LoadPerfCounterDll();
Interop.Kernel32.PerformanceCounterOptions.PDH_FMT_COUNTERVALUE pdhFormattedValue = new Interop.Kernel32.PerformanceCounterOptions.PDH_FMT_COUNTERVALUE();
long timeBase = newSample.SystemFrequency;
int result = Interop.PerfCounter.FormatFromRawValue((uint)newCounterType, Interop.Kernel32.PerformanceCounterOptions.PDH_FMT_DOUBLE | Interop.Kernel32.PerformanceCounterOptions.PDH_FMT_NOSCALE | Interop.Kernel32.PerformanceCounterOptions.PDH_FMT_NOCAP100,
ref timeBase, ref newPdhValue, ref oldPdhValue, ref pdhFormattedValue);
if (result != Interop.Errors.ERROR_SUCCESS)
{
// If the numbers go negative, just return 0. This better matches the old behavior.
if (result == Interop.Kernel32.PerformanceCounterOptions.PDH_CALC_NEGATIVE_VALUE || result == Interop.Kernel32.PerformanceCounterOptions.PDH_CALC_NEGATIVE_DENOMINATOR || result == Interop.Kernel32.PerformanceCounterOptions.PDH_NO_DATA)
{
return(0);
}
else
{
throw new Win32Exception(result, SR.Format(SR.PerfCounterPdhError, result.ToString("x", CultureInfo.InvariantCulture)));
}
}
return((float)pdhFormattedValue.data);
}
public PerformanceCounter()
{
this.counterType = -1;
this.oldSample = CounterSample.Empty;
this.machineName = ".";
this.categoryName = string.Empty;
this.counterName = string.Empty;
this.instanceName = string.Empty;
this.isReadOnly = true;
GC.SuppressFinalize(this);
}
public PerformanceCounter()
{
this.counterType = -1;
this.oldSample = CounterSample.Empty;
this.machineName = ".";
this.categoryName = string.Empty;
this.counterName = string.Empty;
this.instanceName = string.Empty;
this.isReadOnly = true;
GC.SuppressFinalize(this);
}
public bool Equals(CounterSample sample)
{
return((rawValue == sample.rawValue) &&
(baseValue == sample.baseValue) &&
(timeStamp == sample.timeStamp) &&
(counterFrequency == sample.counterFrequency) &&
(counterType == sample.counterType) &&
(timeStamp100nSec == sample.timeStamp100nSec) &&
(systemFrequency == sample.systemFrequency) &&
(counterTimeStamp == sample.counterTimeStamp));
}
/// <summary>
/// Obtains a counter sample and returns the calculated value for it.
/// NOTE: For counters whose calculated value depend upon 2 counter reads,
/// the very first read will return 0.0.
/// </summary>
public float NextValue()
{
//No need to initialize or Demand, since NextSample already does.
CounterSample newSample = NextSample();
float retVal = 0.0f;
retVal = CounterSample.Calculate(_oldSample, newSample);
_oldSample = newSample;
return(retVal);
}
internal PerformanceCounter(string categoryName, string counterName, string instanceName, string machineName, bool skipInit)
{
this.counterType = -1;
this.oldSample = CounterSample.Empty;
this.MachineName = machineName;
this.CategoryName = categoryName;
this.CounterName = counterName;
this.InstanceName = instanceName;
this.isReadOnly = true;
this.initialized = true;
GC.SuppressFinalize(this);
}
public PerformanceCounter(string categoryName, string counterName, string instanceName, bool readOnly)
{
this.counterType = -1;
this.oldSample = CounterSample.Empty;
this.MachineName = ".";
this.CategoryName = categoryName;
this.CounterName = counterName;
this.InstanceName = instanceName;
this.isReadOnly = readOnly;
this.Initialize();
GC.SuppressFinalize(this);
}
public PerformanceCounter(string categoryName, string counterName, string instanceName, bool readOnly)
{
this.counterType = -1;
this.oldSample = CounterSample.Empty;
this.MachineName = ".";
this.CategoryName = categoryName;
this.CounterName = counterName;
this.InstanceName = instanceName;
this.isReadOnly = readOnly;
this.Initialize();
GC.SuppressFinalize(this);
}
internal PerformanceCounter(string categoryName, string counterName, string instanceName, string machineName, bool skipInit)
{
this.counterType = -1;
this.oldSample = CounterSample.Empty;
this.MachineName = machineName;
this.CategoryName = categoryName;
this.CounterName = counterName;
this.InstanceName = instanceName;
this.isReadOnly = true;
this.initialized = true;
GC.SuppressFinalize(this);
}
public static float ComputeCounterValue (CounterSample newSample)
{
switch (newSample.CounterType) {
case PerformanceCounterType.RawFraction:
case PerformanceCounterType.NumberOfItems32:
case PerformanceCounterType.NumberOfItemsHEX32:
case PerformanceCounterType.NumberOfItems64:
case PerformanceCounterType.NumberOfItemsHEX64:
return (float)newSample.RawValue;
default:
return 0;
}
}
// may throw InvalidOperationException, Win32Exception
public CounterSample NextSample()
{
CounterSample sample;
if (changed)
{
UpdateInfo();
}
GetSample(impl, false, out sample);
valid_old = true;
old_sample = sample;
return(sample);
}
/// <summary>
/// Gets the elapsed time between two samples
/// </summary>
/// <param name="oldSample">The old sample.</param>
/// <param name="newSample">The new sample.</param>
/// <returns>Duration.</returns>
public static Duration GetElapsedTime(CounterSample oldSample, CounterSample newSample)
{
// No data [start time = 0] so return 0
if (newSample.RawValue == 0)
return Duration.Zero;
float eFreq = (ulong)oldSample.CounterFrequency;
ulong o = (ulong)oldSample.CounterTimeStamp;
ulong n = (ulong)newSample.CounterTimeStamp;
return o >= n ||
eFreq <= 0.0f
? Duration.Zero
: Duration.FromSeconds((long)((n - o) / eFreq));
}
/// <include file='doc\CounterSampleCalculator.uex' path='docs/doc[@for="CounterSampleCalculator.CounterCounterCommon"]/*' />
/// <devdoc>
/// Take the difference between the current and previous counts
/// then divide by the time interval
/// </devdoc>
/// <internalonly/>
private static float CounterCounterCommon(CounterSample oldSample, CounterSample newSample)
{
float eTimeInterval;
float eDifference;
float eCount;
bool bValueDrop = false;
if (!IsCounterBulk((int)oldSample.CounterType))
{
// check if it is too big to be a wrap-around case
if (newSample.UnsignedRawValue < oldSample.UnsignedRawValue)
{
if (newSample.UnsignedRawValue - oldSample.UnsignedRawValue > 0x00ffff0000)
{
return(0.0f);
}
bValueDrop = true;
}
}
if (oldSample.UnsignedRawValue >= newSample.UnsignedRawValue)
{
return(0.0f);
}
eDifference = (float)(newSample.UnsignedRawValue - oldSample.UnsignedRawValue);
eTimeInterval = GetTimeInterval((ulong)newSample.TimeStamp,
(ulong)oldSample.TimeStamp,
(ulong)newSample.SystemFrequency);
if (eTimeInterval <= 0.0f)
{
return(0.0f);
}
else
{
eCount = eDifference / eTimeInterval;
if (bValueDrop && (eCount > TOO_BIG))
{
// ignore this bogus data since it is too big for
// the wrap-around case
eCount = 0.0f;
}
return(eCount);
}
}
public static float ComputeCounterValue(CounterSample newSample)
{
switch (newSample.CounterType)
{
case PerformanceCounterType.RawFraction:
case PerformanceCounterType.NumberOfItems32:
case PerformanceCounterType.NumberOfItemsHEX32:
case PerformanceCounterType.NumberOfItems64:
case PerformanceCounterType.NumberOfItemsHEX64:
return((float)newSample.RawValue);
default:
return(0);
}
}
public static float ComputeCounterValue (CounterSample oldSample,
CounterSample newSample)
{
if (newSample.CounterType != oldSample.CounterType)
throw new Exception ("The counter samples must be of the same type");
switch (newSample.CounterType) {
case PerformanceCounterType.RawFraction:
case PerformanceCounterType.NumberOfItems32:
case PerformanceCounterType.NumberOfItemsHEX32:
case PerformanceCounterType.NumberOfItems64:
case PerformanceCounterType.NumberOfItemsHEX64:
return (float)newSample.RawValue;
case PerformanceCounterType.AverageCount64:
return (float)(newSample.RawValue - oldSample.RawValue)/(float)(newSample.BaseValue - oldSample.BaseValue);
case PerformanceCounterType.AverageTimer32:
return (((float)(newSample.RawValue - oldSample.RawValue))/newSample.SystemFrequency)/(float)(newSample.BaseValue - oldSample.BaseValue);
case PerformanceCounterType.CounterDelta32:
case PerformanceCounterType.CounterDelta64:
return (float)(newSample.RawValue - oldSample.RawValue);
case PerformanceCounterType.CounterMultiTimer:
return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp) * 100.0f/newSample.BaseValue;
case PerformanceCounterType.CounterMultiTimer100Ns:
return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec) * 100.0f/newSample.BaseValue;
case PerformanceCounterType.CounterMultiTimerInverse:
return (newSample.BaseValue - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp)) * 100.0f;
case PerformanceCounterType.CounterMultiTimer100NsInverse:
return (newSample.BaseValue - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec)) * 100.0f;
case PerformanceCounterType.CounterTimer:
case PerformanceCounterType.CountPerTimeInterval32:
case PerformanceCounterType.CountPerTimeInterval64:
return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp);
case PerformanceCounterType.CounterTimerInverse:
return (1.0f - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec)) * 100.0f;
case PerformanceCounterType.ElapsedTime:
// FIXME
return 0;
case PerformanceCounterType.Timer100Ns:
return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp) * 100.0f;
case PerformanceCounterType.Timer100NsInverse:
return (1f - ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp)) * 100.0f;
case PerformanceCounterType.RateOfCountsPerSecond32:
case PerformanceCounterType.RateOfCountsPerSecond64:
return ((float)(newSample.RawValue - oldSample.RawValue))/(float)(newSample.TimeStamp - oldSample.TimeStamp) * 10000000;
default:
Console.WriteLine ("Counter type {0} not handled", newSample.CounterType);
return 0;
}
}
private static float GetElapsedTime(CounterSample oldSample, CounterSample newSample)
{
if (newSample.RawValue == 0L)
{
return(0f);
}
float counterFrequency = oldSample.CounterFrequency;
if ((oldSample.UnsignedRawValue >= newSample.CounterTimeStamp) || (counterFrequency <= 0f))
{
return(0f);
}
float num2 = ((ulong)newSample.CounterTimeStamp) - oldSample.UnsignedRawValue;
return(num2 / counterFrequency);
}
/// <devdoc>
/// Computes the calculated value given a raw counter sample.
/// </devdoc>
public static float ComputeCounterValue(CounterSample oldSample, CounterSample newSample) {
int newCounterType = (int) newSample.CounterType;
if (oldSample.SystemFrequency == 0) {
if ((newCounterType != NativeMethods.PERF_RAW_FRACTION) &&
(newCounterType != NativeMethods.PERF_COUNTER_RAWCOUNT) &&
(newCounterType != NativeMethods.PERF_COUNTER_RAWCOUNT_HEX) &&
(newCounterType != NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT) &&
(newCounterType != NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT_HEX) &&
(newCounterType != NativeMethods.PERF_COUNTER_MULTI_BASE)) {
// Since oldSample has a system frequency of 0, this means the newSample is the first sample
// on a two sample calculation. Since we can't do anything with it, return 0.
return 0.0f;
}
}
else if (oldSample.CounterType != newSample.CounterType) {
throw new InvalidOperationException(SR.GetString(SR.MismatchedCounterTypes));
}
if (newCounterType == NativeMethods.PERF_ELAPSED_TIME)
return (float)GetElapsedTime(oldSample, newSample);
NativeMethods.PDH_RAW_COUNTER newPdhValue = new NativeMethods.PDH_RAW_COUNTER();
NativeMethods.PDH_RAW_COUNTER oldPdhValue = new NativeMethods.PDH_RAW_COUNTER();
FillInValues(oldSample, newSample, oldPdhValue, newPdhValue);
LoadPerfCounterDll();
NativeMethods.PDH_FMT_COUNTERVALUE pdhFormattedValue= new NativeMethods.PDH_FMT_COUNTERVALUE();
long timeBase = newSample.SystemFrequency;
int result = SafeNativeMethods.FormatFromRawValue((uint) newCounterType, NativeMethods.PDH_FMT_DOUBLE | NativeMethods.PDH_FMT_NOSCALE | NativeMethods.PDH_FMT_NOCAP100,
ref timeBase, newPdhValue, oldPdhValue, pdhFormattedValue);
if (result != NativeMethods.ERROR_SUCCESS) {
// If the numbers go negative, just return 0. This better matches the old behavior.
if (result == NativeMethods.PDH_CALC_NEGATIVE_VALUE || result == NativeMethods.PDH_CALC_NEGATIVE_DENOMINATOR || result == NativeMethods.PDH_NO_DATA)
return 0;
else
throw new Win32Exception(result, SR.GetString(SR.PerfCounterPdhError, result.ToString("x", CultureInfo.InvariantCulture)));
}
return (float) pdhFormattedValue.data;
}
/// <include file='doc\CounterSampleCalculator.uex' path='docs/doc[@for="CounterSampleCalculator.CounterRawFraction"]/*' />
/// <devdoc>
/// Evaluate a raw fraction (no time, just two values: Numerator and
/// Denominator) and multiply by 100 (to make a percentage;
/// </devdoc>
/// <internalonly/>
private static float CounterRawFraction(CounterSample newSample)
{
float eCount;
float eNumerator;
if (newSample.RawValue == 0 ||
newSample.BaseValue == 0)
{
// invalid value
return(0.0f);
}
else
{
eNumerator = (float)newSample.UnsignedRawValue * 100;
eCount = eNumerator /
(float)newSample.UnsignedBaseValue;
return(eCount);
}
}
internal InstanceDataCollection ReadInstanceData(string counterName)
{
InstanceDataCollection datas = new InstanceDataCollection(counterName);
string[] array = new string[this.categorySample.InstanceNameTable.Count];
this.categorySample.InstanceNameTable.Keys.CopyTo(array, 0);
int[] numArray = new int[this.categorySample.InstanceNameTable.Count];
this.categorySample.InstanceNameTable.Values.CopyTo(numArray, 0);
for (int i = 0; i < array.Length; i++)
{
long baseValue = 0L;
if (this.BaseCounterDefinitionSample != null)
{
int index = (int) this.BaseCounterDefinitionSample.categorySample.InstanceNameTable[array[i]];
baseValue = this.BaseCounterDefinitionSample.instanceValues[index];
}
CounterSample sample = new CounterSample(this.instanceValues[numArray[i]], baseValue, this.categorySample.CounterFrequency, this.categorySample.SystemFrequency, this.categorySample.TimeStamp, this.categorySample.TimeStamp100nSec, (PerformanceCounterType) this.CounterType, this.categorySample.CounterTimeStamp);
datas.Add(array[i], new InstanceData(array[i], sample));
}
return datas;
}
internal InstanceDataCollection ReadInstanceData(string counterName)
{
InstanceDataCollection datas = new InstanceDataCollection(counterName);
string[] array = new string[this.categorySample.InstanceNameTable.Count];
this.categorySample.InstanceNameTable.Keys.CopyTo(array, 0);
int[] numArray = new int[this.categorySample.InstanceNameTable.Count];
this.categorySample.InstanceNameTable.Values.CopyTo(numArray, 0);
for (int i = 0; i < array.Length; i++)
{
long baseValue = 0L;
if (this.BaseCounterDefinitionSample != null)
{
int index = (int)this.BaseCounterDefinitionSample.categorySample.InstanceNameTable[array[i]];
baseValue = this.BaseCounterDefinitionSample.instanceValues[index];
}
CounterSample sample = new CounterSample(this.instanceValues[numArray[i]], baseValue, this.categorySample.CounterFrequency, this.categorySample.SystemFrequency, this.categorySample.TimeStamp, this.categorySample.TimeStamp100nSec, (PerformanceCounterType)this.CounterType, this.categorySample.CounterTimeStamp);
datas.Add(array[i], new InstanceData(array[i], sample));
}
return(datas);
}
public static float ComputeCounterValue(CounterSample oldSample, CounterSample newSample)
{
int counterType = (int)newSample.CounterType;
if (oldSample.SystemFrequency == 0L)
{
if ((((counterType != 0x20020400) && (counterType != 0x10000)) && ((counterType != 0) && (counterType != 0x10100))) && ((counterType != 0x100) && (counterType != 0x42030500)))
{
return(0f);
}
}
else if (oldSample.CounterType != newSample.CounterType)
{
throw new InvalidOperationException(SR.GetString("MismatchedCounterTypes"));
}
if (counterType == 0x30240500)
{
return(GetElapsedTime(oldSample, newSample));
}
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER newPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER oldPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
FillInValues(oldSample, newSample, oldPdhValue, newPdhValue);
LoadPerfCounterDll();
Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE pFmtValue = new Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE();
long systemFrequency = newSample.SystemFrequency;
int error = Microsoft.Win32.SafeNativeMethods.FormatFromRawValue((uint)counterType, 0x9200, ref systemFrequency, newPdhValue, oldPdhValue, pFmtValue);
switch (error)
{
case 0:
return((float)pFmtValue.data);
case -2147481640:
case -2147481642:
case -2147481643:
return(0f);
}
throw new Win32Exception(error, SR.GetString("PerfCounterPdhError", new object[] { error.ToString("x", CultureInfo.InvariantCulture) }));
}
// may throw InvalidOperationException, Win32Exception
public float NextValue()
{
CounterSample sample;
if (changed)
{
UpdateInfo();
}
GetSample(impl, false, out sample);
float val;
if (valid_old)
{
val = CounterSampleCalculator.ComputeCounterValue(old_sample, sample);
}
else
{
val = CounterSampleCalculator.ComputeCounterValue(sample);
}
valid_old = true;
old_sample = sample;
return(val);
}
public static float ComputeCounterValue(CounterSample oldSample, CounterSample newSample)
{
int counterType = (int) newSample.CounterType;
if (oldSample.SystemFrequency == 0L)
{
if ((((counterType != 0x20020400) && (counterType != 0x10000)) && ((counterType != 0) && (counterType != 0x10100))) && ((counterType != 0x100) && (counterType != 0x42030500)))
{
return 0f;
}
}
else if (oldSample.CounterType != newSample.CounterType)
{
throw new InvalidOperationException(SR.GetString("MismatchedCounterTypes"));
}
if (counterType == 0x30240500)
{
return GetElapsedTime(oldSample, newSample);
}
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER newPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER oldPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
FillInValues(oldSample, newSample, oldPdhValue, newPdhValue);
LoadPerfCounterDll();
Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE pFmtValue = new Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE();
long systemFrequency = newSample.SystemFrequency;
int error = Microsoft.Win32.SafeNativeMethods.FormatFromRawValue((uint) counterType, 0x9200, ref systemFrequency, newPdhValue, oldPdhValue, pFmtValue);
switch (error)
{
case 0:
return (float) pFmtValue.data;
case -2147481640:
case -2147481642:
case -2147481643:
return 0f;
}
throw new Win32Exception(error, SR.GetString("PerfCounterPdhError", new object[] { error.ToString("x", CultureInfo.InvariantCulture) }));
}
/// <devdoc>
/// Converts 100NS elapsed time to fractional seconds
/// </devdoc>
/// <internalonly/>
private static float GetElapsedTime(CounterSample oldSample, CounterSample newSample) {
float eSeconds;
float eDifference;
if (newSample.RawValue == 0) {
// no data [start time = 0] so return 0
return 0.0f;
}
else {
float eFreq;
eFreq = (float)(ulong)oldSample.CounterFrequency;
if (oldSample.UnsignedRawValue >= (ulong)newSample.CounterTimeStamp || eFreq <= 0.0f)
return 0.0f;
// otherwise compute difference between current time and start time
eDifference = (float)((ulong)newSample.CounterTimeStamp - oldSample.UnsignedRawValue);
// convert to fractional seconds using object counter
eSeconds = eDifference / eFreq;
return eSeconds;
}
}
public static float ComputeCounterValue(CounterSample oldSample,
CounterSample newSample)
{
if (newSample.CounterType != oldSample.CounterType)
{
throw new Exception("The counter samples must be of the same type");
}
switch (newSample.CounterType)
{
case PerformanceCounterType.RawFraction:
case PerformanceCounterType.NumberOfItems32:
case PerformanceCounterType.NumberOfItemsHEX32:
case PerformanceCounterType.NumberOfItems64:
case PerformanceCounterType.NumberOfItemsHEX64:
return((float)newSample.RawValue);
case PerformanceCounterType.AverageCount64:
return((float)(newSample.RawValue - oldSample.RawValue) / (float)(newSample.BaseValue - oldSample.BaseValue));
case PerformanceCounterType.AverageTimer32:
return((((float)(newSample.RawValue - oldSample.RawValue)) / newSample.SystemFrequency) / (float)(newSample.BaseValue - oldSample.BaseValue));
case PerformanceCounterType.CounterDelta32:
case PerformanceCounterType.CounterDelta64:
return((float)(newSample.RawValue - oldSample.RawValue));
case PerformanceCounterType.CounterMultiTimer:
return(((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp - oldSample.TimeStamp) * 100.0f / newSample.BaseValue);
case PerformanceCounterType.CounterMultiTimer100Ns:
return(((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec) * 100.0f / newSample.BaseValue);
case PerformanceCounterType.CounterMultiTimerInverse:
return((newSample.BaseValue - ((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp - oldSample.TimeStamp)) * 100.0f);
case PerformanceCounterType.CounterMultiTimer100NsInverse:
return((newSample.BaseValue - ((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec)) * 100.0f);
case PerformanceCounterType.CounterTimer:
case PerformanceCounterType.CountPerTimeInterval32:
case PerformanceCounterType.CountPerTimeInterval64:
return(((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp - oldSample.TimeStamp));
case PerformanceCounterType.CounterTimerInverse:
return((1.0f - ((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp100nSec - oldSample.TimeStamp100nSec)) * 100.0f);
case PerformanceCounterType.ElapsedTime:
// FIXME
return(0);
case PerformanceCounterType.Timer100Ns:
return(((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp - oldSample.TimeStamp) * 100.0f);
case PerformanceCounterType.Timer100NsInverse:
return((1f - ((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp - oldSample.TimeStamp)) * 100.0f);
case PerformanceCounterType.RateOfCountsPerSecond32:
case PerformanceCounterType.RateOfCountsPerSecond64:
return(((float)(newSample.RawValue - oldSample.RawValue)) / (float)(newSample.TimeStamp - oldSample.TimeStamp) * 10000000);
default:
Console.WriteLine("Counter type {0} not handled", newSample.CounterType);
return(0);
}
}
/// <devdoc>
/// Static functions to calculate the performance value off the samples
/// </devdoc>
public static float Calculate(CounterSample counterSample, CounterSample nextCounterSample) {
return CounterSampleCalculator.ComputeCounterValue(counterSample, nextCounterSample);
}
/// <summary>
/// Computes the calculated value given a raw counter sample.
/// </summary>
public static float ComputeCounterValue(CounterSample newSample)
{
return(ComputeCounterValue(CounterSample.Empty, newSample));
}
public static float ComputeCounterValue(CounterSample newSample)
{
return(default(float));
}
// This method figures out which values are supposed to go into which structures so that PDH can do the
// calculation for us. This was ported from Window's cutils.c
private static void FillInValues(CounterSample oldSample, CounterSample newSample, NativeMethods.PDH_RAW_COUNTER oldPdhValue, NativeMethods.PDH_RAW_COUNTER newPdhValue) {
int newCounterType = (int) newSample.CounterType;
switch (newCounterType) {
case NativeMethods.PERF_COUNTER_COUNTER:
case NativeMethods.PERF_COUNTER_QUEUELEN_TYPE:
case NativeMethods.PERF_SAMPLE_COUNTER:
case NativeMethods.PERF_OBJ_TIME_TIMER:
case NativeMethods.PERF_COUNTER_OBJ_TIME_QUEUELEN_TYPE:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
break;
case NativeMethods.PERF_COUNTER_100NS_QUEUELEN_TYPE:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
break;
case NativeMethods.PERF_COUNTER_TIMER:
case NativeMethods.PERF_COUNTER_TIMER_INV:
case NativeMethods.PERF_COUNTER_BULK_COUNT:
case NativeMethods.PERF_COUNTER_LARGE_QUEUELEN_TYPE:
case NativeMethods.PERF_COUNTER_MULTI_TIMER:
case NativeMethods.PERF_COUNTER_MULTI_TIMER_INV:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
if (newCounterType == NativeMethods.PERF_COUNTER_MULTI_TIMER || newCounterType == NativeMethods.PERF_COUNTER_MULTI_TIMER_INV) {
// this is to make PDH work like PERFMON for
// this counter type
newPdhValue.FirstValue *= (uint) newSample.CounterFrequency;
if (oldSample.CounterFrequency != 0) {
oldPdhValue.FirstValue *= (uint) oldSample.CounterFrequency;
}
}
if ((newCounterType & NativeMethods.PERF_MULTI_COUNTER) == NativeMethods.PERF_MULTI_COUNTER) {
newPdhValue.MultiCount = (int) newSample.BaseValue;
oldPdhValue.MultiCount = (int) oldSample.BaseValue;
}
break;
//
// These counters do not use any time reference
//
case NativeMethods.PERF_COUNTER_RAWCOUNT:
case NativeMethods.PERF_COUNTER_RAWCOUNT_HEX:
case NativeMethods.PERF_COUNTER_DELTA:
case NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT:
case NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT_HEX:
case NativeMethods.PERF_COUNTER_LARGE_DELTA:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = 0;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = 0;
break;
//
// These counters use the 100 Ns time base in thier calculation
//
case NativeMethods.PERF_100NSEC_TIMER:
case NativeMethods.PERF_100NSEC_TIMER_INV:
case NativeMethods.PERF_100NSEC_MULTI_TIMER:
case NativeMethods.PERF_100NSEC_MULTI_TIMER_INV:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
if ((newCounterType & NativeMethods.PERF_MULTI_COUNTER) == NativeMethods.PERF_MULTI_COUNTER) {
newPdhValue.MultiCount = (int) newSample.BaseValue;
oldPdhValue.MultiCount = (int) oldSample.BaseValue;
}
break;
//
// These counters use two data points
//
case NativeMethods.PERF_SAMPLE_FRACTION:
case NativeMethods.PERF_RAW_FRACTION:
case NativeMethods.PERF_LARGE_RAW_FRACTION:
case NativeMethods.PERF_PRECISION_SYSTEM_TIMER:
case NativeMethods.PERF_PRECISION_100NS_TIMER:
case NativeMethods.PERF_PRECISION_OBJECT_TIMER:
case NativeMethods.PERF_AVERAGE_TIMER:
case NativeMethods.PERF_AVERAGE_BULK:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.BaseValue;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.BaseValue;
break;
default:
// an unidentified counter was returned so
newPdhValue.FirstValue = 0;
newPdhValue.SecondValue = 0;
oldPdhValue.FirstValue = 0;
oldPdhValue.SecondValue = 0;
break;
}
}
/// <devdoc>
/// Static functions to calculate the performance value off the samples
/// </devdoc>
public static float Calculate(CounterSample counterSample, CounterSample nextCounterSample)
{
return(CounterSampleCalculator.ComputeCounterValue(counterSample, nextCounterSample));
}
public void Close()
{
this.helpMsg = null;
this.oldSample = CounterSample.Empty;
this.sharedCounter = null;
this.initialized = false;
this.counterType = -1;
}
static bool GetSample (IntPtr impl, bool only_value, out CounterSample sample)
{
throw new System.NotImplementedException();
}
// may throw InvalidOperationException, Win32Exception
public float NextValue ()
{
CounterSample sample;
if (changed)
UpdateInfo ();
GetSample (impl, false, out sample);
float val;
if (valid_old)
val = CounterSampleCalculator.ComputeCounterValue (old_sample, sample);
else
val = CounterSampleCalculator.ComputeCounterValue (sample);
valid_old = true;
old_sample = sample;
return val;
}
/// <include file='doc\CounterSampleCalculator.uex' path='docs/doc[@for="CounterSampleCalculator.ComputeCounterValue1"]/*' />
/// <devdoc>
/// Computes the calculated value given a raw counter sample.
/// </devdoc>
public static float ComputeCounterValue(CounterSample oldSample, CounterSample newSample)
{
int newCounterType = (int)newSample.CounterType;
if (oldSample.SystemFrequency == 0)
{
if ((newCounterType != NativeMethods.PERF_RAW_FRACTION) &&
(newCounterType != NativeMethods.PERF_COUNTER_RAWCOUNT) &&
(newCounterType != NativeMethods.PERF_COUNTER_RAWCOUNT_HEX) &&
(newCounterType != NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT) &&
(newCounterType != NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT_HEX) &&
(newCounterType != NativeMethods.PERF_COUNTER_MULTI_BASE))
{
// Since oldSample has a system frequency of 0, this means the newSample is the first sample
// on a two sample calculation. Since we can't do anything with it, return 0.
return(0.0f);
}
}
else if (oldSample.CounterType != newSample.CounterType)
{
throw new InvalidOperationException(SR.GetString(SR.MismatchedCounterTypes));
}
switch (newCounterType)
{
case NativeMethods.PERF_COUNTER_COUNTER:
case NativeMethods.PERF_COUNTER_BULK_COUNT:
case NativeMethods.PERF_SAMPLE_COUNTER:
return(CounterCounterCommon(oldSample, newSample));
case NativeMethods.PERF_AVERAGE_TIMER:
return(CounterAverageTimer(oldSample, newSample));
case NativeMethods.PERF_COUNTER_QUEUELEN_TYPE:
case NativeMethods.PERF_COUNTER_LARGE_QUEUELEN_TYPE:
case NativeMethods.PERF_AVERAGE_BULK:
return(CounterAverageBulk(oldSample, newSample));
case NativeMethods.PERF_COUNTER_TIMER:
case NativeMethods.PERF_COUNTER_TIMER_INV:
case NativeMethods.PERF_100NSEC_TIMER:
case NativeMethods.PERF_100NSEC_TIMER_INV:
case NativeMethods.PERF_COUNTER_MULTI_TIMER:
case NativeMethods.PERF_COUNTER_MULTI_TIMER_INV:
case NativeMethods.PERF_100NSEC_MULTI_TIMER:
case NativeMethods.PERF_100NSEC_MULTI_TIMER_INV:
return(CounterTimerCommon(oldSample, newSample));
case NativeMethods.PERF_RAW_FRACTION:
return(CounterRawFraction(newSample));
case NativeMethods.PERF_SAMPLE_FRACTION:
return(SampleCommon(oldSample, newSample));
case NativeMethods.PERF_COUNTER_RAWCOUNT:
case NativeMethods.PERF_COUNTER_RAWCOUNT_HEX:
return((float)newSample.RawValue);
case NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT:
case NativeMethods.PERF_COUNTER_LARGE_RAWCOUNT_HEX:
return((float)newSample.RawValue);
case NativeMethods.PERF_COUNTER_MULTI_BASE:
return(0.0f);
case NativeMethods.PERF_ELAPSED_TIME:
return((float)GetElapsedTime(oldSample, newSample));
case NativeMethods.PERF_COUNTER_DELTA:
case NativeMethods.PERF_COUNTER_LARGE_DELTA:
if (oldSample.UnsignedRawValue >= newSample.UnsignedRawValue)
{
return(-(float)(oldSample.UnsignedRawValue - newSample.UnsignedRawValue));
}
else
{
return((float)(newSample.UnsignedRawValue - oldSample.UnsignedRawValue));
}
default:
return(0.0f);
}
}
static bool GetSample(IntPtr impl, bool only_value, out CounterSample sample)
{
throw new System.NotImplementedException();
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public InstanceData(string instanceName, CounterSample sample) {
this.instanceName = instanceName;
this.sample = sample;
}
/// <include file='doc\CounterSampleCalculator.uex' path='docs/doc[@for="CounterSampleCalculator.CounterTimerCommon"]/*' />
/// <devdoc>
/// Take the difference between the current and previous counts,
/// Normalize the count (counts per interval)
/// divide by the time interval (count = % of interval)
/// if (invert)
/// subtract from 1 (the normalized size of an interval)
/// multiply by 100 (convert to a percentage)
/// this value from 100.
/// </devdoc>
/// <internalonly/>
private static float CounterTimerCommon(CounterSample oldSample, CounterSample newSample)
{
float eTimeInterval;
float eDifference;
float eFreq;
float eFraction;
float eMultiBase;
float eCount;
// Get the amount of time that has passed since the last sample
int oldCounterType = (int)oldSample.CounterType;
if (oldCounterType == NativeMethods.PERF_100NSEC_TIMER ||
oldCounterType == NativeMethods.PERF_100NSEC_TIMER_INV ||
oldCounterType == NativeMethods.PERF_100NSEC_MULTI_TIMER ||
oldCounterType == NativeMethods.PERF_100NSEC_MULTI_TIMER_INV)
{
if (oldSample.TimeStamp100nSec >= newSample.TimeStamp100nSec)
{
return(0.0f);
}
eTimeInterval = (float)((ulong)newSample.TimeStamp100nSec - (ulong)oldSample.TimeStamp100nSec);
}
else
{
eTimeInterval = GetTimeInterval((ulong)newSample.TimeStamp, (ulong)oldSample.TimeStamp, (ulong)newSample.SystemFrequency);
if (eTimeInterval <= 0.0f)
{
return(0.0f);
}
}
// Get the current and previous counts.
if (oldSample.UnsignedRawValue >= newSample.UnsignedRawValue)
{
eDifference = -(float)(oldSample.UnsignedRawValue - newSample.UnsignedRawValue);
}
else
{
eDifference = (float)(newSample.UnsignedRawValue - oldSample.UnsignedRawValue);
}
// Get the number of counts in this time interval.
// (1, 2, 3 or any number of seconds could have gone by since
// the last sample)
if (oldCounterType == 0 || oldCounterType == NativeMethods.PERF_COUNTER_TIMER_INV)
{
// Get the counts per interval (second)
eFreq = (float)(ulong)newSample.SystemFrequency;
if (eFreq <= 0.0f)
{
return((float)0.0f);
}
// Calculate the fraction of the counts that are used by whatever
// we are measuring
eFraction = eDifference / eFreq;
}
else
{
eFraction = eDifference;
}
// Calculate the fraction of time used by what were measuring.
eCount = eFraction / eTimeInterval;
// If this is an inverted count take care of the inversion.
if (oldCounterType == NativeMethods.PERF_COUNTER_TIMER_INV ||
oldCounterType == NativeMethods.PERF_100NSEC_TIMER_INV)
{
eCount = (float)1.0f - eCount;
}
// If this is an inverted multi count take care of the inversion.
if (oldCounterType == NativeMethods.PERF_COUNTER_MULTI_TIMER_INV ||
oldCounterType == NativeMethods.PERF_100NSEC_MULTI_TIMER_INV)
{
eMultiBase = (float)newSample.UnsignedBaseValue;
eCount = eMultiBase - eCount;
}
// adjust eCount for non-inverted multi count
if (oldCounterType == NativeMethods.PERF_COUNTER_MULTI_TIMER ||
oldCounterType == NativeMethods.PERF_100NSEC_MULTI_TIMER)
{
eMultiBase = (float)newSample.UnsignedBaseValue;
eCount = eCount / eMultiBase;
}
// Scale the value to up to 100.
eCount *= 100.0f;
if (eCount < 0.0f)
{
eCount = 0.0f;
}
if (eCount > 100.0f &&
oldCounterType != NativeMethods.PERF_100NSEC_MULTI_TIMER &&
oldCounterType != NativeMethods.PERF_100NSEC_MULTI_TIMER_INV &&
oldCounterType != NativeMethods.PERF_COUNTER_MULTI_TIMER &&
oldCounterType != NativeMethods.PERF_COUNTER_MULTI_TIMER_INV)
{
eCount = 100.0f;
}
return(eCount);
}
/// <summary>
/// 获取性能计数器下一个采样
/// </summary>
/// <returns></returns>
public CounterSample NextSample()
{
CounterSample sample = new CounterSample();
if (this.counter != null)
sample = this.counter.NextSample();
return sample;
}
internal InstanceDataCollection ReadInstanceData(string counterName) {
#pragma warning disable 618
InstanceDataCollection data = new InstanceDataCollection(counterName);
#pragma warning restore 618
string[] keys = new string[categorySample.InstanceNameTable.Count];
categorySample.InstanceNameTable.Keys.CopyTo(keys, 0);
int[] indexes = new int[categorySample.InstanceNameTable.Count];
categorySample.InstanceNameTable.Values.CopyTo(indexes, 0);
for (int index = 0; index < keys.Length; ++ index) {
long baseValue = 0;
if (this.BaseCounterDefinitionSample != null) {
CategorySample baseCategorySample = this.BaseCounterDefinitionSample.categorySample;
int baseIndex = (int)baseCategorySample.InstanceNameTable[keys[index]];
baseValue = this.BaseCounterDefinitionSample.instanceValues[baseIndex];
}
CounterSample sample = new CounterSample(this.instanceValues[indexes[index]],
baseValue,
categorySample.CounterFrequency,
categorySample.SystemFrequency,
categorySample.TimeStamp,
categorySample.TimeStamp100nSec,
(PerformanceCounterType)this.CounterType,
categorySample.CounterTimeStamp);
data.Add(keys[index], new InstanceData(keys[index], sample));
}
return data;
}
/// <devdoc>
/// Computes the calculated value given a raw counter sample.
/// </devdoc>
public static float ComputeCounterValue(CounterSample newSample) {
return ComputeCounterValue(CounterSample.Empty, newSample);
}
static extern bool GetSample(IntPtr impl, bool only_value, out CounterSample sample);
/// Resets the internal counter. All subsequent calls to GetCpuUtilization() will
/// be relative to the point in time when you called ResetCounter(). This
/// method can be call as often as necessary to get a new baseline for
/// CPU utilization measurements.
public void ResetCounter()
{
_startSample = _cnt.NextSample();
}
static extern bool GetSample (IntPtr impl, bool only_value, out CounterSample sample);
private static void FillInValues(CounterSample oldSample, CounterSample newSample, Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER oldPdhValue, Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER newPdhValue)
{
int counterType = (int)newSample.CounterType;
switch (counterType)
{
case 0:
case 0x100:
case 0x10000:
case 0x400500:
case 0x10100:
case 0x400400:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = 0L;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = 0L;
return;
case 0x410400:
case 0x650500:
case 0x450400:
case 0x10410400:
case 0x20610500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
return;
case 0x550500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
return;
case 0x450500:
case 0x10410500:
case 0x20410500:
case 0x22410500:
case 0x21410500:
case 0x23410500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
switch (counterType)
{
case 0x22410500:
case 0x23410500:
newPdhValue.FirstValue *= (uint)newSample.CounterFrequency;
if (oldSample.CounterFrequency != 0L)
{
oldPdhValue.FirstValue *= (uint)oldSample.CounterFrequency;
}
break;
}
if ((counterType & 0x2000000) == 0x2000000)
{
newPdhValue.MultiCount = (int)newSample.BaseValue;
oldPdhValue.MultiCount = (int)oldSample.BaseValue;
}
return;
case 0x20020400:
case 0x20020500:
case 0x20470500:
case 0x20670500:
case 0x20c20400:
case 0x20570500:
case 0x30020400:
case 0x40020500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.BaseValue;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.BaseValue;
return;
case 0x20510500:
case 0x22510500:
case 0x21510500:
case 0x23510500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
if ((counterType & 0x2000000) == 0x2000000)
{
newPdhValue.MultiCount = (int)newSample.BaseValue;
oldPdhValue.MultiCount = (int)oldSample.BaseValue;
}
return;
}
newPdhValue.FirstValue = 0L;
newPdhValue.SecondValue = 0L;
oldPdhValue.FirstValue = 0L;
oldPdhValue.SecondValue = 0L;
}
public InstanceData(string instanceName, CounterSample sample)
{
}
public static float ComputeCounterValue(CounterSample newSample)
{
return default(float);
}
public InstanceData(string instanceName, CounterSample sample)
{
this.instanceName = instanceName;
this.sample = sample;
}
// This method figures out which values are supposed to go into which structures so that PDH can do the
// calculation for us. This was ported from Window's cutils.c
private static void FillInValues(CounterSample oldSample, CounterSample newSample, ref Interop.Kernel32.PerformanceCounterOptions.PDH_RAW_COUNTER oldPdhValue, ref Interop.Kernel32.PerformanceCounterOptions.PDH_RAW_COUNTER newPdhValue)
{
int newCounterType = (int)newSample.CounterType;
switch (newCounterType)
{
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_COUNTER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_QUEUELEN_TYPE:
case Interop.Kernel32.PerformanceCounterOptions.PERF_SAMPLE_COUNTER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_OBJ_TIME_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_OBJ_TIME_QUEUELEN_TYPE:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
break;
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_100NS_QUEUELEN_TYPE:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
break;
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_TIMER_INV:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_BULK_COUNT:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_LARGE_QUEUELEN_TYPE:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_MULTI_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_MULTI_TIMER_INV:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
if (newCounterType == Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_MULTI_TIMER || newCounterType == Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_MULTI_TIMER_INV)
{
// this is to make PDH work like PERFMON for
// this counter type
newPdhValue.FirstValue *= (uint)newSample.CounterFrequency;
if (oldSample.CounterFrequency != 0)
{
oldPdhValue.FirstValue *= (uint)oldSample.CounterFrequency;
}
}
if ((newCounterType & Interop.Kernel32.PerformanceCounterOptions.PERF_MULTI_COUNTER) == Interop.Kernel32.PerformanceCounterOptions.PERF_MULTI_COUNTER)
{
newPdhValue.MultiCount = (int)newSample.BaseValue;
oldPdhValue.MultiCount = (int)oldSample.BaseValue;
}
break;
//
// These counters do not use any time reference
//
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_RAWCOUNT:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_RAWCOUNT_HEX:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_DELTA:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_LARGE_RAWCOUNT:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_LARGE_RAWCOUNT_HEX:
case Interop.Kernel32.PerformanceCounterOptions.PERF_COUNTER_LARGE_DELTA:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = 0;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = 0;
break;
//
// These counters use the 100 Ns time base in thier calculation
//
case Interop.Kernel32.PerformanceCounterOptions.PERF_100NSEC_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_100NSEC_TIMER_INV:
case Interop.Kernel32.PerformanceCounterOptions.PERF_100NSEC_MULTI_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_100NSEC_MULTI_TIMER_INV:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
if ((newCounterType & Interop.Kernel32.PerformanceCounterOptions.PERF_MULTI_COUNTER) == Interop.Kernel32.PerformanceCounterOptions.PERF_MULTI_COUNTER)
{
newPdhValue.MultiCount = (int)newSample.BaseValue;
oldPdhValue.MultiCount = (int)oldSample.BaseValue;
}
break;
//
// These counters use two data points
//
case Interop.Kernel32.PerformanceCounterOptions.PERF_SAMPLE_FRACTION:
case Interop.Kernel32.PerformanceCounterOptions.PERF_RAW_FRACTION:
case Interop.Kernel32.PerformanceCounterOptions.PERF_LARGE_RAW_FRACTION:
case Interop.Kernel32.PerformanceCounterOptions.PERF_PRECISION_SYSTEM_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_PRECISION_100NS_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_PRECISION_OBJECT_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_AVERAGE_TIMER:
case Interop.Kernel32.PerformanceCounterOptions.PERF_AVERAGE_BULK:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.BaseValue;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.BaseValue;
break;
default:
// an unidentified counter was returned so
newPdhValue.FirstValue = 0;
newPdhValue.SecondValue = 0;
oldPdhValue.FirstValue = 0;
oldPdhValue.SecondValue = 0;
break;
}
}
// may throw InvalidOperationException, Win32Exception
public CounterSample NextSample ()
{
CounterSample sample;
if (changed)
UpdateInfo ();
GetSample (impl, false, out sample);
valid_old = true;
old_sample = sample;
return sample;
}
public bool Equals(CounterSample sample) {
return (rawValue == sample.rawValue) &&
(baseValue == sample.baseValue) &&
(timeStamp == sample.timeStamp) &&
(counterFrequency == sample.counterFrequency) &&
(counterType == sample.counterType) &&
(timeStamp100nSec == sample.timeStamp100nSec) &&
(systemFrequency == sample.systemFrequency) &&
(counterTimeStamp == sample.counterTimeStamp);
}
public InstanceData(string instanceName, CounterSample sample)
{
}
public float NextValue()
{
CounterSample nextCounterSample = this.NextSample();
float num = 0f;
num = CounterSample.Calculate(this.oldSample, nextCounterSample);
this.oldSample = nextCounterSample;
return num;
}