// =========================
/// <summary>
/// Допустим ли переход между состояниями
/// </summary>
/// <param name="curState">Исходное состояние</param>
/// <param name="newState">Новое состояние</param>
/// <returns>Допустимость</returns>
private bool CanChangeState(ExecutionThroughoutTrackerUpDownCorrectionState curState, ExecutionThroughoutTrackerUpDownCorrectionState newState)
{
if (curState == newState)
{
return(true);
}
switch (curState)
{
case ExecutionThroughoutTrackerUpDownCorrectionState.InOptimalState:
return(newState == ExecutionThroughoutTrackerUpDownCorrectionState.FindBestDirection);
case ExecutionThroughoutTrackerUpDownCorrectionState.FindBestDirection:
return(newState == ExecutionThroughoutTrackerUpDownCorrectionState.InOptimalState || newState == ExecutionThroughoutTrackerUpDownCorrectionState.Increasing || newState == ExecutionThroughoutTrackerUpDownCorrectionState.Decreasing);
case ExecutionThroughoutTrackerUpDownCorrectionState.Increasing:
return(newState == ExecutionThroughoutTrackerUpDownCorrectionState.InOptimalState || newState == ExecutionThroughoutTrackerUpDownCorrectionState.FindBestDirection);
case ExecutionThroughoutTrackerUpDownCorrectionState.Decreasing:
return(newState == ExecutionThroughoutTrackerUpDownCorrectionState.InOptimalState || newState == ExecutionThroughoutTrackerUpDownCorrectionState.FindBestDirection);
default:
throw new InvalidOperationException("Unknown state: " + curState.ToString());
}
}
/// <summary>
/// Конструктор ExecutionThroughoutTrackerUpDownCorrection
/// </summary>
/// <param name="maxThreadCount">Максимальное число потоков</param>
/// <param name="reasonableThreadCount">Базовое число потоков</param>
public ExecutionThroughoutTrackerUpDownCorrection(int maxThreadCount, int reasonableThreadCount)
{
Contract.Requires(maxThreadCount > 0);
Contract.Requires(reasonableThreadCount > 0);
Contract.Requires(maxThreadCount >= reasonableThreadCount);
_maxThreadCount = maxThreadCount;
_reasonableThreadCount = reasonableThreadCount;
_executedTasks = 0;
_lastTimeStamp = GetTimestamp();
_data = new ThroughoutData[EstimationDataLength];
_nextDataIndex = 0;
_state = ExecutionThroughoutTrackerUpDownCorrectionState.FindBestDirection;
_enterStateTimeStamp = GetTimestamp();
_enterStateThroughoutData = new ThroughoutData();
_stateMeasureCount = 0;
_findBestDirectionBlinkCount = 0;
_optimalStateAverageThroughout = -1;
_decresingAverageThoughoutBaseline = -1;
_isPerfMeasureThreadWork = false;
}
/// <summary>
/// Выполнить переход в состояние
/// </summary>
/// <param name="description">Описание причин перехода</param>
/// <param name="state">Новое состояние</param>
private void GoToState(string description, ExecutionThroughoutTrackerUpDownCorrectionState state)
{
if (!CanChangeState(_state, state))
{
throw new InvalidOperationException("Invalid state change from " + _state.ToString() + " to " + state.ToString());
}
//Console.WriteLine(description + ". State = " + _state.ToString() + ", NewState = " + state.ToString());
if (_state != state)
{
_state = state;
_enterStateTimeStamp = GetTimestamp();
_enterStateThroughoutData = this.GetCurrentMeasure();
_stateMeasureCount = 0;
_findBestDirectionBlinkCount = 0;
_optimalStateAverageThroughout = -1;
_decresingAverageThoughoutBaseline = -1;
Debug.Assert(_isPerfMeasureThreadWork == false);
}
}