/// <summary>
/// This is where the algorithm works (does its job)
/// </summary>
public override void Work()
{
if (!ready)
{
return;
}
PCB shortest = null;
double minLength = int.MaxValue;
foreach (var pcb in Pool)
{
//calculate Response Ratio
if (pcb.State != PCB.ProcessState.WAITING && pcb.State != PCB.ProcessState.DEAD && pcb.Process.Length < minLength)
{
//set shortest
shortest = pcb;
//set min burst time
minLength = pcb.Process.Length;
}
}
if (current != shortest)
{
current = shortest;
}
}
/// <summary>
/// This is where the algorithm works (does its job)
/// </summary>
public override void Work()
{
if (!ready)
{
return;
}
PCB shortest = null;
double maxRespRatio = 0;
foreach (var pcb in Pool)
{
//calculate Response Ratio
if (pcb.State != PCB.ProcessState.WAITING && pcb.State != PCB.ProcessState.DEAD && (pcb.Process.WaitTime + pcb.Process.RemainingTick) / pcb.Process.RemainingTick > maxRespRatio)
{
//set shortest
shortest = pcb;
//set max burst time
maxRespRatio = (pcb.Process.RemainingTick + pcb.Process.Progress) / pcb.Process.RemainingTick;
}
}
if (current != shortest)
{
current = shortest;
}
}
/// <summary>
/// Constructor of the Control
/// </summary>
/// <param name="pcb"></param>
public ProcessSimulationRow(PCB pcb)
{
InitializeComponent();
labelPID.Text = pcb.PID.ToString();
labelName.Text = pcb.Process.Name;
labelState.Text = pcb.State.ToString();
ChangeBackgroundByState(pcb.State);
}
/// <summary>
/// Removes the current process from the CPU
/// </summary>
public void UnsetProcess()
{
if (currentProcess != null)
{
currentProcess = null;
working = false;
}
}
/// <summary>
/// Encapsulate a single process into PCB (Process Control Block)
/// </summary>
/// <param name="process">The process</param>
/// <returns>The encapsulated PCB</returns>
public PCB AddAndEncapsulateProcess(Process process)
{
EventLogger.AddEvent("New process: " + process.ToString());
PCB pcb = new PCB(counter++, process);
ProcessList.Add(pcb);
//Add process to the scheduling algorithm too
selectedAlgorithm.AddNewProcess(pcb);
return(pcb);
}
private void UpdateUI()
{
// Update label async
labelUtil.BeginInvoke((Action)(() =>
{
labelUtil.Text = running ? (Math.Round(scheduler.UsefulCPUTime * 100).ToString() + "%") : "-";
}));
labelTurnaround.BeginInvoke((Action)(() =>
{
labelTurnaround.Text = scheduler.Turns.ToString();
}));
labelCurrTime.BeginInvoke((Action)(() =>
{
labelCurrTime.Text = scheduler.ElapsedTime.ToString();
}));
int fullLength = 0;
int curr = 0;
foreach (var pcb in scheduler.ProcessList)
{
fullLength += pcb.Process.Length;
curr += pcb.Process.Progress;
}
labelCurrTime.BeginInvoke((Action)(() =>
{
labelCompletion.Text = Math.Round((double)curr * 100 / fullLength).ToString() + "%";
}));
// Sets dynamic parameters of processes in the list
// Update process view
foreach (KeyValuePair <int, ProcessSimulationRow> elem in processes)
{
PCB pcb = scheduler.GetProcessByID(elem.Key);
elem.Value.UpdateData(pcb);
}
// Updates the Ready Queue label
string readyQueueString = "";
foreach (PCB process in scheduler.ReadyProcesses)
{
readyQueueString += "P#";
readyQueueString += process.PID.ToString();
readyQueueString += " ";
}
labelrQueue.BeginInvoke((Action)(() =>
{
labelrQueue.Text = readyQueueString;
}));
}
/// <summary>
/// Adds process to the Process View Panel
/// </summary>
/// <param name="pcb">The pcb</param>
private void AddProcessToView(PCB pcb)
{
ProcessSimulationRow psr = new ProcessSimulationRow(pcb)
{
Height = 30,
//FlowLayout is tricky
//Element width is determined by an element which has a width explicitly
//In our case this is the Header or 'table'
Anchor = (AnchorStyles.Left | AnchorStyles.Right)
};
processes.Add(pcb.PID, psr);
processViewPanel.Controls.Add(psr);
}
/// <summary>
/// As the method name says, it does work (everything)
/// </summary>
/// <returns>Is CPU currently working</returns>
public bool DoWork()
{
if (currentProcess != null)
{
working = currentProcess.Work();
if (currentProcess.State == PCB.ProcessState.DEAD)
{
currentProcess = null;
}
return(working);
}
return(false);
}
/// <summary>
/// This is where the algorithm works (does its job)
/// </summary>
public override void Work()
{
if (!ready)
{
return;
}
PCB shortest = Pool.Where(x => x.State != PCB.ProcessState.DEAD && x.State != PCB.ProcessState.WAITING)
.OrderBy(x => x.Process.Length - x.Process.Progress).FirstOrDefault();
if (current != shortest)
{
current = shortest;
}
}
/// <summary>
/// Changes layout by a specified process
/// </summary>
/// <param name="pcb">Process which the layout should be based on</param>
public void UpdateData(PCB pcb)
{
labelState.Text = pcb.State.ToString();
progressBarProgress.Maximum = pcb.Process.Length;
progressBarProgress.Value = pcb.Process.Progress;
if (pcb.Process.CurrentIO != null)
{
progressBarIO.Maximum = pcb.Process.CurrentIO.Length;
progressBarIO.Value = pcb.Process.CurrentIO.Progress;
}
else
{
progressBarIO.Value = 0;
}
ChangeBackgroundByState(pcb.State);
}
/// <summary>
/// Sets the current process
/// </summary>
/// <param name="process">Process which is dhould be processed by the CPU</param>
public void SetProcess(PCB process)
{
currentProcess = process;
working = true;
}
/// <summary>
/// Constructor of the CPU Simulator
/// </summary>
public CPU()
{
working = false;
currentProcess = null;
}
/// <summary>
/// Clears the algorithm, resets it to defaults
/// </summary>
public virtual void Reset()
{
pool.Clear();
current = null;
ready = false;
}
/// <summary>
/// Adds new processes (even at runtime)
/// </summary>
/// <param name="pcb"></param>
public void AddNewProcess(PCB pcb)
{
pool.Add(pcb);
}