public static double GetProdU() {
int noNodes = 0;
int noStreams = 0;
PDQ pdq = new PDQ();
pdq.Init("");
noStreams = pdq.CreateClosed("Production", Job.TERM, 20.0, 20.0);
noNodes = pdq.CreateNode("CPU", Node.CEN, QDiscipline.FCFS);
noNodes = pdq.CreateNode("DK1", Node.CEN, QDiscipline.FCFS);
noNodes = pdq.CreateNode("DK2", Node.CEN, QDiscipline.FCFS);
pdq.SetDemand("CPU", "Production", 0.30);
pdq.SetDemand("DK1", "Production", 0.08);
pdq.SetDemand("DK2", "Production", 0.10);
pdq.Solve(Methods.APPROX);
return (pdq.GetUtilization("CPU", "Production", Job.TERM));
}
public static void main(String[] args) {
Parameters p = new Parameters();
int noNodes = 0;
int noStreams = 0;
double Ucpu_prod = 0.0;
boolean PRIORITY = true; // Turn priority on or off here
String noPri = "CPU Scheduler - No Pri";
String priOn = "CPU Scheduler - Pri On";
// ----------------------------------------------------------------------------
if (PRIORITY) {
Ucpu_prod = GetProdU();
}
// ----------------------------------------------------------------------------
PDQ pdq = new PDQ();
pdq.Init(PRIORITY ? priOn : noPri);
// ---- Workloads
// -------------------------------------------------------------
noStreams = pdq.CreateClosed("Production", Job.TERM, 20.0, 20.0);
noStreams = pdq.CreateClosed("Developmnt", Job.TERM, 15.0, 15.0);
// ---- Nodes
// -----------------------------------------------------------------
noNodes = pdq.CreateNode("CPU", Node.CEN, QDiscipline.FCFS);
if (PRIORITY) {
noNodes = pdq.CreateNode("shadCPU", Node.CEN, QDiscipline.FCFS);
}
noNodes = pdq.CreateNode("DK1", Node.CEN, QDiscipline.FCFS);
noNodes = pdq.CreateNode("DK2", Node.CEN, QDiscipline.FCFS);
// ---- Service demands at each node
// ------------------------------------------
pdq.SetDemand("CPU", "Production", 0.30);
if (PRIORITY) {
pdq.SetDemand("shadCPU", "Developmnt", 1.00 / (1 - Ucpu_prod));
} else {
pdq.SetDemand("CPU", "Developmnt", 1.00);
}
pdq.SetDemand("DK1", "Production", 0.08);
pdq.SetDemand("DK1", "Developmnt", 0.05);
pdq.SetDemand("DK2", "Production", 0.10);
pdq.SetDemand("DK2", "Developmnt", 0.06);
// ---- We use APPROX rather than EXACT to match the numbers in the book
// ------
pdq.Solve(Methods.APPROX);
pdq.Report();
} // main