| 1 | package de.uka.ipd.sdq.scheduler.resources.active; |
| 2 | |
| 3 | import java.util.ArrayDeque; |
| 4 | import java.util.Deque; |
| 5 | import java.util.Hashtable; |
| 6 | import java.util.Map.Entry; |
| 7 | |
| 8 | import de.uka.ipd.sdq.probfunction.math.util.MathTools; |
| 9 | import de.uka.ipd.sdq.scheduler.IRunningProcess; |
| 10 | import de.uka.ipd.sdq.scheduler.ISchedulableProcess; |
| 11 | import de.uka.ipd.sdq.scheduler.LoggingWrapper; |
| 12 | import de.uka.ipd.sdq.scheduler.SchedulerModel; |
| 13 | import de.uka.ipd.sdq.simulation.abstractsimengine.AbstractSimEventDelegator; |
| 14 | |
| 15 | public class SimFCFSResource extends AbstractActiveResource { |
| 16 | |
| 17 | private class ProcessingFinishedEvent extends AbstractSimEventDelegator<ISchedulableProcess> { |
| 18 | |
| 19 | public ProcessingFinishedEvent(SchedulerModel model) { |
| 20 | super(model, ProcessingFinishedEvent.class.getName()); |
| 21 | } |
| 22 | |
| 23 | @Override |
| 24 | public void eventRoutine(ISchedulableProcess process) { |
| 25 | ISchedulableProcess first = process; |
| 26 | toNow(); |
| 27 | assert MathTools.equalsDouble(0, running_processes.get(first)); |
| 28 | running_processes.remove(first); |
| 29 | processQ.remove(first); |
| 30 | fireStateChange(processQ.size(), 0); |
| 31 | fireDemandCompleted(first); |
| 32 | LoggingWrapper.log("Demand of Process "+ first + " finished."); |
| 33 | scheduleNextEvent(); |
| 34 | first.activate(); |
| 35 | } |
| 36 | |
| 37 | } |
| 38 | |
| 39 | private ProcessingFinishedEvent processingFinished; |
| 40 | private Deque<ISchedulableProcess> processQ = new ArrayDeque<ISchedulableProcess>(); |
| 41 | private Hashtable<ISchedulableProcess, Double> running_processes = new Hashtable<ISchedulableProcess, Double>(); |
| 42 | private double last_time; |
| 43 | |
| 44 | public SimFCFSResource(SchedulerModel model, String name, String id, int capacity) { |
| 45 | super(model, capacity, name, id); |
| 46 | processingFinished = new ProcessingFinishedEvent(model); |
| 47 | } |
| 48 | |
| 49 | public void scheduleNextEvent() { |
| 50 | ISchedulableProcess first = processQ.peek(); |
| 51 | processingFinished.removeEvent(); |
| 52 | if (first != null) { |
| 53 | double time = running_processes.get(first); |
| 54 | processingFinished.schedule(first, time); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | private void toNow() { |
| 59 | double now = getModel().getSimulationControl().getCurrentSimulationTime(); |
| 60 | double passed_time = now - last_time; |
| 61 | if (MathTools.less(0, passed_time)) { |
| 62 | ISchedulableProcess first = processQ.peek(); |
| 63 | if (first != null) { |
| 64 | double demand = running_processes.get(first); |
| 65 | demand -= passed_time; |
| 66 | |
| 67 | // avoid trouble caused by rounding issues |
| 68 | demand = MathTools.equalsDouble(demand, 0) ? 0.0 : demand; |
| 69 | |
| 70 | assert demand >= 0 : "Remaining demand ("+ demand +") smaller than zero!"; |
| 71 | |
| 72 | running_processes.put(first, demand); |
| 73 | } |
| 74 | } |
| 75 | last_time = now; |
| 76 | |
| 77 | } |
| 78 | |
| 79 | public void start() { |
| 80 | } |
| 81 | |
| 82 | @Override |
| 83 | protected void dequeue(ISchedulableProcess process) { |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | protected void doProcessing(ISchedulableProcess process, int resourceServiceID, double demand) { |
| 88 | toNow(); |
| 89 | LoggingWrapper.log("FCFS: " + process + " demands " + demand); |
| 90 | running_processes.put(process, demand); |
| 91 | processQ.add(process); |
| 92 | fireStateChange(processQ.size(), 0); |
| 93 | scheduleNextEvent(); |
| 94 | process.passivate(); |
| 95 | } |
| 96 | |
| 97 | @Override |
| 98 | public double getRemainingDemand(ISchedulableProcess process) { |
| 99 | if (!running_processes.contains(process)) { |
| 100 | return 0.0; |
| 101 | } |
| 102 | toNow(); |
| 103 | return running_processes.get(process); |
| 104 | } |
| 105 | |
| 106 | @Override |
| 107 | public void updateDemand(ISchedulableProcess process, double demand) { |
| 108 | for (Entry<ISchedulableProcess,Double> e : running_processes.entrySet()) { |
| 109 | if (e.getKey().equals(process)) { |
| 110 | e.setValue(demand); |
| 111 | break; |
| 112 | } |
| 113 | } |
| 114 | scheduleNextEvent(); |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | protected void enqueue(ISchedulableProcess process) { |
| 119 | } |
| 120 | |
| 121 | public void stop() { |
| 122 | // TODO: why are these fields not empty when the simulation stops, although AbstractActiveResource.cleanProcesses() |
| 123 | // is being called? This should be investigated, and the following cleanup should not be necessary. |
| 124 | // (this problem has been encountered for a linking resource) |
| 125 | processQ.clear(); |
| 126 | running_processes.clear(); |
| 127 | } |
| 128 | |
| 129 | public void registerProcess(IRunningProcess runningProcess) { |
| 130 | } |
| 131 | |
| 132 | public int getQueueLengthFor(SimResourceInstance simResourceInstance) { |
| 133 | return this.processQ.size(); |
| 134 | } |
| 135 | } |