/// <summary>
/// Finalize latency analysis for the supplied type of message
/// </summary>
/// <param name="theMessageId">The identifier for the type of message for which latency analysis is to be finalized</param>
/// <param name="theRows">The data table rows on which latency analysis is to be finalized</param>
private void FinaliseForMessageId(ulong theMessageId, DictionaryEnumerableType theRows)
{
CommonHistogram theHistogram =
new CommonHistogram(
this.theDebugInformation,
Constants.NumberOfBins,
Constants.BestCaseLatency,
Constants.WorstCaseLatency);
ulong theNumberOfMessagePairs = 0;
double theMinTimestampDifference = double.MaxValue;
double theMaxTimestampDifference = double.MinValue;
ulong theMinTimestampPacketNumber = 0;
ulong theMaxTimestampPacketNumber = 0;
ulong theMinTimestampSequenceNumber = 0;
ulong theMaxTimestampSequenceNumber = 0;
ulong theNumberOfTimestampDifferenceInstances = 0;
double theTotalOfTimestampDifferences = 0;
double theAverageTimestampDifference = 0;
System.Collections.Generic.List <string> theOutOfRangeLatencies =
new System.Collections.Generic.List <string>();
foreach (DictionaryKeyValuePairType theRow in theRows)
{
// Keep a running total of the number of message pairs
++theNumberOfMessagePairs;
double theTimestampDifference = theRow.Value.TimestampDifference;
if (!theHistogram.AddValue(theTimestampDifference))
{
theOutOfRangeLatencies.Add(
"The message pair for packet number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theRow.Value.FirstInstancePacketNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" and sequence number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theRow.Key.SequenceNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" has an out of range latency of " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theRow.Value.TimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms");
}
//// Keep a running total of the timestamp differences to allow for averaging
++theNumberOfTimestampDifferenceInstances;
theTotalOfTimestampDifferences += theTimestampDifference;
if (theMinTimestampDifference > theTimestampDifference)
{
theMinTimestampDifference = theTimestampDifference;
theMinTimestampPacketNumber = theRow.Value.FirstInstancePacketNumber;
theMinTimestampSequenceNumber = theRow.Key.SequenceNumber;
}
if (theMaxTimestampDifference < theTimestampDifference)
{
theMaxTimestampDifference = theTimestampDifference;
theMaxTimestampPacketNumber = theRow.Value.FirstInstancePacketNumber;
theMaxTimestampSequenceNumber = theRow.Key.SequenceNumber;
}
}
this.theDebugInformation.WriteTextLine(
"The number of message pairs with a Message Id of " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,5}", theMessageId.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" was " +
theNumberOfMessagePairs.ToString(System.Globalization.CultureInfo.CurrentCulture));
if (theNumberOfTimestampDifferenceInstances > 0)
{
theAverageTimestampDifference =
theTotalOfTimestampDifferences /
theNumberOfTimestampDifferenceInstances;
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
"The minimum latency was " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theMinTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms for packet number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMinTimestampPacketNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" and sequence number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMinTimestampSequenceNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)));
this.theDebugInformation.WriteTextLine(
"The maximum latency was " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theMaxTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms for packet number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMaxTimestampPacketNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" and sequence number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMaxTimestampSequenceNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)));
this.theDebugInformation.WriteTextLine(
"The average latency was " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theAverageTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms");
if (this.outputHistogram)
{
//// Output the histogram
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
"The histogram (" +
Constants.BinsPerMillisecond.ToString(System.Globalization.CultureInfo.CurrentCulture) +
" bins per millisecond) for the latencies is:");
this.theDebugInformation.WriteBlankLine();
theHistogram.OutputValues();
}
if (theOutOfRangeLatencies.Any())
{
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
"The number of those message pairs that had an out of range latency was " +
theOutOfRangeLatencies.Count().ToString(System.Globalization.CultureInfo.CurrentCulture));
if (this.outputAdditionalInformation)
{
this.theDebugInformation.WriteBlankLine();
// Output the data for any message pair with an out of range latency
foreach (string theString in theOutOfRangeLatencies)
{
this.theDebugInformation.WriteTextLine(theString);
}
}
}
}
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
// Output additional information for the supplied type of message
this.OutputAdditionalInformation(
theMessageId,
theRows,
theNumberOfTimestampDifferenceInstances);
}
/// <summary>
/// Finalize burst analysis for the supplied type of message
/// </summary>
/// <param name="theHostId">The host Id for which burst analysis is to be finalized</param>
/// <param name="isOutgoing">Boolean flag that indicates whether the messages to be finalized were received on its outgoing journey or its incoming journey (true indicates outgoing, false indicates incoming)</param>
/// <param name="theMessageId">The identifier for the type of message for which burst analysis is to be finalized</param>
/// <param name="theRows">The data table rows on which burst analysis is to be finalized</param>
private void FinaliseForMessageId(byte theHostId, bool isOutgoing, ulong theMessageId, EnumerableRowCollection <System.Data.DataRow> theRows)
{
CommonHistogram theTimestampHistogram =
new CommonHistogram(
this.theDebugInformation,
Constants.NumberOfBins,
Constants.MinTimestampDifference,
Constants.MaxTimestampDifference);
ulong theNumberOfMessages = 0;
double theMinTimestampDifference = double.MaxValue;
double theMaxTimestampDifference = double.MinValue;
ulong theMinTimestampPacketNumber = 0;
ulong theMaxTimestampPacketNumber = 0;
ulong theMinTimestampSequenceNumber = 0;
ulong theMaxTimestampSequenceNumber = 0;
double theLastTimestamp = 0.0;
ulong theNumberOfTimestampDifferenceInstances = 0;
double theTotalOfTimestampDifferences = 0;
double theAverageTimestampDifference = 0;
bool theFirstRowProcessed = false;
System.Collections.Generic.List <string> theIgnoredTimestamps =
new System.Collections.Generic.List <string>();
System.Collections.Generic.List <string> theOutOfRangeTimestamps =
new System.Collections.Generic.List <string>();
foreach (System.Data.DataRow theTimestampValuesRow in theRows)
{
// Keep a running total of the number of messages
++theNumberOfMessages;
ulong theSequenceNumber = theTimestampValuesRow.Field <ulong>("SequenceNumber");
ulong thePacketNumber = theTimestampValuesRow.Field <ulong>("PacketNumber");
double thePacketTimestamp = theTimestampValuesRow.Field <double>("PacketTimestamp");
// Do not calculate the difference in timestamp for first row - just record value and move on to second row
if (!theFirstRowProcessed)
{
theLastTimestamp = thePacketTimestamp;
theFirstRowProcessed = true;
continue;
}
//// The timestamp
double theAbsoluteTimestampDifference =
System.Math.Abs((thePacketTimestamp - theLastTimestamp) * 1000.0); // Milliseconds
// Only those messages with a timestamp difference in the chosen range will be marked as processed
// This should prevent the processing of duplicates of a message (e.g. if port mirroring results in two copies of the time-supplying message)
if (theAbsoluteTimestampDifference < Constants.MinAbsoluteTimestampDifference)
{
theIgnoredTimestamps.Add(
"The message for packet number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", thePacketNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" and sequence number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theSequenceNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" has an absolute timestamp difference of " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theAbsoluteTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms which is below the minimum value of " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,5}", Constants.MinAbsoluteTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms so it has been ignored and discarded");
}
else
{
double theTimestampDifference =
(thePacketTimestamp - theLastTimestamp) * 1000.0; // Milliseconds
//// Keep a running total of the timestamp differences to allow for averaging
++theNumberOfTimestampDifferenceInstances;
theTotalOfTimestampDifferences += theTimestampDifference;
if (!theTimestampHistogram.AddValue(theTimestampDifference))
{
theOutOfRangeTimestamps.Add(
"The message for packet number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", thePacketNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" and sequence number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theSequenceNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" has an out of range timestamp difference of " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms");
}
if (theMinTimestampDifference > theTimestampDifference)
{
theMinTimestampDifference = theTimestampDifference;
theMinTimestampPacketNumber = thePacketNumber;
theMinTimestampSequenceNumber = theSequenceNumber;
}
if (theMaxTimestampDifference < theTimestampDifference)
{
theMaxTimestampDifference = theTimestampDifference;
theMaxTimestampPacketNumber = thePacketNumber;
theMaxTimestampSequenceNumber = theSequenceNumber;
}
// Keep a record of the last timestamp received (from this time-supplying
// message) to allow comparison with the next timestamp received
theLastTimestamp = thePacketTimestamp;
}
}
if (isOutgoing)
{
this.theDebugInformation.WriteTextLine(
"The number of outgoing messages with a Message Id of " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,5}", theMessageId) +
" was " +
theNumberOfMessages.ToString(System.Globalization.CultureInfo.CurrentCulture));
}
else
{
this.theDebugInformation.WriteTextLine(
"The number of incoming messages with a Message Id of " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,5}", theMessageId) +
" was " +
theNumberOfMessages.ToString(System.Globalization.CultureInfo.CurrentCulture));
}
if (theNumberOfTimestampDifferenceInstances > 0)
{
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
theAverageTimestampDifference =
theTotalOfTimestampDifferences /
theNumberOfTimestampDifferenceInstances;
this.theDebugInformation.WriteTextLine(
"The minimum timestamp difference was " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theMinTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms for packet number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMinTimestampPacketNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" and sequence number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMinTimestampSequenceNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)));
this.theDebugInformation.WriteTextLine(
"The maximum timestamp difference was " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theMaxTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms for packet number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMaxTimestampPacketNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" and sequence number " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,7}", theMaxTimestampSequenceNumber.ToString(System.Globalization.CultureInfo.CurrentCulture)));
this.theDebugInformation.WriteTextLine(
"The average timestamp difference was " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theAverageTimestampDifference.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" ms");
if (theAverageTimestampDifference > 0)
{
this.theDebugInformation.WriteBlankLine();
double theMessageRate =
1.0 /
(theAverageTimestampDifference / 1000.0); // Hertz
this.theDebugInformation.WriteTextLine(
"The average message rate was " +
string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0,19}", theMessageRate.ToString(System.Globalization.CultureInfo.CurrentCulture)) +
" Hz");
}
if (this.outputHistogram)
{
//// Output the histogram
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
"The histogram (" +
Constants.BinsPerMillisecond.ToString(System.Globalization.CultureInfo.CurrentCulture) +
" bins per millisecond) for the timestamp differences is:");
this.theDebugInformation.WriteBlankLine();
theTimestampHistogram.OutputValues();
}
if (theOutOfRangeTimestamps.Any())
{
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
if (isOutgoing)
{
this.theDebugInformation.WriteTextLine(
"The number of those outgoing messages that had an out of range timestamp difference was " +
theOutOfRangeTimestamps.Count().ToString(System.Globalization.CultureInfo.CurrentCulture));
}
else
{
this.theDebugInformation.WriteTextLine(
"The number of those incoming messages that had an out of range timestamp difference was " +
theOutOfRangeTimestamps.Count().ToString(System.Globalization.CultureInfo.CurrentCulture));
}
if (this.outputAdditionalInformation)
{
this.theDebugInformation.WriteBlankLine();
// Output the data for any message with an out of range timestamp difference
foreach (string theString in theOutOfRangeTimestamps)
{
this.theDebugInformation.WriteTextLine(theString);
}
}
}
if (theIgnoredTimestamps.Any())
{
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
if (isOutgoing)
{
this.theDebugInformation.WriteTextLine(
"The number of those outgoing messages that were ignored and discarded was " +
theIgnoredTimestamps.Count().ToString(System.Globalization.CultureInfo.CurrentCulture));
}
else
{
this.theDebugInformation.WriteTextLine(
"The number of those incoming messages that were ignored and discarded was " +
theIgnoredTimestamps.Count().ToString(System.Globalization.CultureInfo.CurrentCulture));
}
if (this.outputAdditionalInformation)
{
this.theDebugInformation.WriteBlankLine();
// Output the data for any time-supplying messages that were ignored and discarded
foreach (string theString in theIgnoredTimestamps)
{
this.theDebugInformation.WriteTextLine(theString);
}
}
}
}
this.theDebugInformation.WriteBlankLine();
this.theDebugInformation.WriteTextLine(
new string('-', 144));
this.theDebugInformation.WriteBlankLine();
// Output additional information for the supplied type of message
this.OutputAdditionalInformation(
theHostId,
isOutgoing,
theMessageId,
theRows,
theNumberOfTimestampDifferenceInstances);
}