| 1 | /** |
| 2 | * |
| 3 | */ |
| 4 | package de.uka.ipd.sdq.tcfmoop.terminationcriteria; |
| 5 | |
| 6 | import java.lang.management.ManagementFactory; |
| 7 | import java.lang.management.ThreadMXBean; |
| 8 | |
| 9 | import org.opt4j.core.Archive; |
| 10 | import org.opt4j.core.Population; |
| 11 | |
| 12 | import de.uka.ipd.sdq.tcfmoop.config.ElapsedTimeConfig; |
| 13 | import de.uka.ipd.sdq.tcfmoop.config.IConfiguration; |
| 14 | import de.uka.ipd.sdq.tcfmoop.config.ElapsedTimeConfig.TimeType; |
| 15 | import de.uka.ipd.sdq.tcfmoop.outputtree.Node; |
| 16 | import de.uka.ipd.sdq.tcfmoop.outputtree.Node.NodeType; |
| 17 | |
| 18 | /** |
| 19 | * @author Atanas Dimitrov |
| 20 | * |
| 21 | */ |
| 22 | public class ElapsedTimeCriterion extends AbstractTerminationCriterion { |
| 23 | |
| 24 | //The minimum time the optimization is allowed to run |
| 25 | private long executionInterval; |
| 26 | private long elapsedTime; |
| 27 | private TimeType timeType; |
| 28 | private long startTime; |
| 29 | //Required for the check whether CPU time measurement is possible |
| 30 | private ThreadMXBean threadMXBean; |
| 31 | private boolean isCPUTimeMeasuringSupported; |
| 32 | |
| 33 | //OutputNodes |
| 34 | //static |
| 35 | @SuppressWarnings("unused") |
| 36 | private Node timeTypeNode; |
| 37 | //dynamic |
| 38 | private Node executionTimeNode; |
| 39 | private Node remainingTimeNode; |
| 40 | |
| 41 | public ElapsedTimeCriterion(IConfiguration conf, Population population, |
| 42 | Archive archive){ |
| 43 | |
| 44 | super(conf, population, archive); |
| 45 | |
| 46 | if((conf instanceof ElapsedTimeConfig) && conf.validateConfiguration()){ |
| 47 | this.executionInterval = ((ElapsedTimeConfig)(conf)).getExecutionInterval(); |
| 48 | this.timeType = ((ElapsedTimeConfig)(conf)).getTimeType(); |
| 49 | this.startTime = System.currentTimeMillis(); |
| 50 | if(this.timeType.equals(TimeType.CPU_TIME)){ |
| 51 | this.threadMXBean = ManagementFactory.getThreadMXBean(); |
| 52 | if(this.threadMXBean.isThreadCpuTimeSupported()){ |
| 53 | if(!this.threadMXBean.isThreadCpuTimeEnabled()){ |
| 54 | this.threadMXBean.setThreadCpuTimeEnabled(true); |
| 55 | } |
| 56 | this.isCPUTimeMeasuringSupported = true; |
| 57 | }else{ |
| 58 | this.isCPUTimeMeasuringSupported = false; |
| 59 | } |
| 60 | } |
| 61 | }else{ |
| 62 | throw new RuntimeException("ElapsedTimeCriterion.initialize: " + |
| 63 | "wrong or invalid configuration object"); |
| 64 | } |
| 65 | initializeOutputTree(); |
| 66 | |
| 67 | } |
| 68 | |
| 69 | private void initializeOutputTree(){ |
| 70 | this.outputInformation.updateValue("Elapsed Time"); |
| 71 | this.outputInformation.getChildren().clear(); |
| 72 | |
| 73 | if(timeType.equals(TimeType.CPU_TIME)){ |
| 74 | if(!this.isCPUTimeMeasuringSupported){ |
| 75 | this.timeTypeNode = this.outputInformation.addChild("Time Type: Cannot Meassure CPU Time. Measuring USER Time instead.", NodeType.PARAMETER); |
| 76 | }else{ |
| 77 | this.timeTypeNode = this.outputInformation.addChild("Time Type: CPU Time", NodeType.PARAMETER); |
| 78 | } |
| 79 | }else{ |
| 80 | this.timeTypeNode = this.outputInformation.addChild("Time Type: USER Time", NodeType.PARAMETER); |
| 81 | } |
| 82 | |
| 83 | this.executionTimeNode = this.outputInformation.addChild("Minimum Execution Time: " + this.executionInterval + " ms", NodeType.PARAMETER); |
| 84 | this.remainingTimeNode = this.outputInformation.addChild("Elapsed Time: " + this.elapsedTime + " ms", NodeType.PARAMETER); |
| 85 | this.outputInformation.getChildren().add(this.suggestedStop); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * {@inheritDoc} |
| 90 | * Implements the ElapsedTime Criterion: This criterion measures either the CPU time (if possible) |
| 91 | * or the Clock time. When the execution time goes past a certain value, the criterion will report |
| 92 | * that the optimization should be stopped. |
| 93 | */ |
| 94 | @Override |
| 95 | public void evaluateImpl(int iteration, long currentTime) { |
| 96 | if(timeType.equals(TimeType.CPU_TIME)){ |
| 97 | if(this.isCPUTimeMeasuringSupported){ |
| 98 | this.elapsedTime = (threadMXBean.getThreadCpuTime(Thread.currentThread().getId())/1000000); |
| 99 | }else{ |
| 100 | this.elapsedTime = currentTime - this.startTime; |
| 101 | } |
| 102 | }else if(this.timeType.equals(TimeType.USER_TIME)){ |
| 103 | this.elapsedTime = currentTime - this.startTime; |
| 104 | } |
| 105 | |
| 106 | if(this.elapsedTime > this.executionInterval){ |
| 107 | this.evaluationResult = true; |
| 108 | }else{ |
| 109 | this.evaluationResult = false; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * {@inheritDoc} |
| 115 | */ |
| 116 | @Override |
| 117 | public void updateOutputInformation(){ |
| 118 | this.executionTimeNode.updateValue("Minimum Execution Time: " + this.executionInterval + " ms"); |
| 119 | this.remainingTimeNode.updateValue("Elapsed Time: " + this.elapsedTime + " ms"); |
| 120 | } |
| 121 | |
| 122 | } |