public static WaitTimeGenerator GetInstance(ICDFFunction cDFFunction)
{
if (instance == null)
{
lock (padlock)
{
if (instance == null)
{
instance = new WaitTimeGenerator(cDFFunction);
}
}
}
return(instance);
}
private void BtnGenerateProcess_Click(object sender, EventArgs e)
{
int noOfProcesses = Int32.Parse(txtNoOfProcess.Text);
ICDFFunction uniformDistributionFunction = new UniformDistributionFunction();
WaitTimeGenerator waitTimeGenerator = WaitTimeGenerator.GetInstance(uniformDistributionFunction);
List <Process> inputProcesses = waitTimeGenerator.GenerateProcesses(noOfProcesses);
//cpu scheduling simulation
SchedulingAlgorithm fcfsPreemptive = new FirstComeFirstServe(inputProcesses);
Schedule fcfsSchedule = fcfsPreemptive.GenerateProcessSchedule();
SchedulingAlgorithm priorityNonPreemptive = new PriorityNonPreemptive(inputProcesses);
Schedule pnpSchedule = priorityNonPreemptive.GenerateProcessSchedule();
SchedulingAlgorithm shortestRemainingJobFirst = new ShortestRemainingJobFirst(inputProcesses);
Schedule srjfSchedule = shortestRemainingJobFirst.GenerateProcessSchedule();
List <object[]> listProcesses, listFCFSSchedule, listPNPSchedule, listSRJFSchedule;
listProcesses = new List <Object[]>();
listFCFSSchedule = new List <Object[]>();
listPNPSchedule = new List <Object[]>();
listSRJFSchedule = new List <Object[]>();
List <string> strDataset = new List <string>();
List <string> fcfsTurn = new List <string>();
List <string> pnpTurn = new List <string>();
List <string> srjfTurn = new List <string>();
string labels = "";
int totalFCFSTurnAroundTime = 0, totalPNPTurnAroundTime = 0, totalSRJFTurnAroundTime = 0;
foreach (Process process in inputProcesses)
{
string pid = process.GetProcessID();
labels += String.Format("\"{0}\",", pid);
listProcesses.Add(new object[] {
pid,
process.GetArrivalTime(),
process.GetBurstTime(),
process.GetIOBlockTime()
});
int fcfsTurnAroundTime = fcfsSchedule.GetTurnAroundTime(process);
totalFCFSTurnAroundTime += fcfsTurnAroundTime;
int endTime = fcfsSchedule.GetEndTime(process);
fcfsTurn.Add(fcfsTurnAroundTime.ToString());
listFCFSSchedule.Add(new object[] {
pid,
process.GetArrivalTime(),
endTime,
fcfsTurnAroundTime
});
int pnpTurnAroundTime = pnpSchedule.GetTurnAroundTime(process);
totalPNPTurnAroundTime += pnpTurnAroundTime;
endTime = pnpSchedule.GetEndTime(process);
pnpTurn.Add(pnpTurnAroundTime.ToString());
listPNPSchedule.Add(new object[] {
pid,
process.GetArrivalTime(),
endTime,
pnpSchedule.GetTurnAroundTime(process)
});
int srjfTurnAroundTime = srjfSchedule.GetTurnAroundTime(process);
totalSRJFTurnAroundTime += srjfTurnAroundTime;
endTime = srjfSchedule.GetEndTime(process);
srjfTurn.Add(pnpTurnAroundTime.ToString());
listSRJFSchedule.Add(new object[] {
pid,
process.GetArrivalTime(),
endTime,
srjfSchedule.GetTurnAroundTime(process)
});
}
strDataset.Add(ConvertToJSON(new Dictionary <string, object>()
{
{ "label", "First Come First Serve" },
{ "data", String.Join(",", fcfsTurn.ToArray()) }
}));
strDataset.Add(ConvertToJSON(new Dictionary <string, object>()
{
{ "label", "Priority Non Preemptive" },
{ "data", String.Join(",", pnpTurn.ToArray()) }
}));
strDataset.Add(ConvertToJSON(new Dictionary <string, object>()
{
{ "label", "Shortest Remaining Job First" },
{ "data", String.Join(",", srjfTurn.ToArray()) }
}));
labels = labels.Substring(0, labels.Length - 1);
int avgFCFSSchedule, avgPNPSchedule, avgSRJFSchedule;
avgFCFSSchedule = totalFCFSTurnAroundTime / noOfProcesses;
avgPNPSchedule = totalPNPTurnAroundTime / noOfProcesses;
avgSRJFSchedule = totalSRJFTurnAroundTime / noOfProcesses;
lblFCFSAvgTurnAround.Text = avgFCFSSchedule.ToString();
lblPNPAvgTurnAround.Text = avgPNPSchedule.ToString();
lblSRJFAvgTurnAround.Text = avgSRJFSchedule.ToString();
LoadDataGrid(grdProcesses, processBindingSource, ConvertListToDataTable(listProcesses));
LoadDataGrid(grdFCFSSchedule, fcfsScheduleBindingSource, ConvertListToDataTable(listFCFSSchedule, false));
LoadDataGrid(grdPNPSchedule, pnpScheduleBindingSource, ConvertListToDataTable(listPNPSchedule, false));
LoadDataGrid(grdSRJFSchedule, srjfScheduleBindingSource, ConvertListToDataTable(listSRJFSchedule, false));
GenerateGanttChart(strDataset.ToArray(), labels);
}
