private long getUserTime() {
if (bean.isCurrentThreadCpuTimeSupported()) {
return bean.getCurrentThreadUserTime();
} else {
throw new RuntimeException("UserTime NOT Supported");
}
}
public CPUClock() {
threadMXBean = ManagementFactory.getThreadMXBean();
if (!threadMXBean.isCurrentThreadCpuTimeSupported()) {
throw new IllegalStateException("Information about thread CPU times not supported");
}
}
/* Get system time in nanoseconds. */
public static long getSystemTime() {
ThreadMXBean bean = ManagementFactory.getThreadMXBean();
return bean.isCurrentThreadCpuTimeSupported()
? (bean.getCurrentThreadCpuTime() - bean.getCurrentThreadUserTime())
: 0L;
}
// main genetic algorithm process
public static double[] genetic(int[][] state, double cost[], double[] parameters) {
// record the start cpu time
long time = 0;
long bestTime = 0;
ThreadMXBean bean = ManagementFactory.getThreadMXBean();
if (bean.isCurrentThreadCpuTimeSupported()) time = bean.getCurrentThreadCpuTime();
// get the mutation parameters
int mf = (int) parameters[0];
int mc = (int) parameters[1];
double mg = parameters[2];
int numSet = state.length; // number of columns
int numEle = state[0].length; // number of rows
double totalFit = 0; // total fitness value of the population
double avgFit = 0; // the average fitness value of the population
int belowFit =
0; // the number of solutions in the population with a fitness below the average fitness of
// the population
double bestFit = Double.MAX_VALUE; // the best fitness value of the population
double[] results = new double[3]; // the results of the genetic set covering
// sort the columns by their costs increasingly, same costs by the number of rows they can cover
// decreasingly
Integer[] sortedSet = new Integer[numSet];
for (int i = 0; i < numSet; i++) sortedSet[i] = i;
// sort the rows by the number of columns that can cover them
Integer[] sortedEle = new Integer[numEle];
for (int i = 0; i < numEle; i++) sortedEle[i] = i;
int[] eleEle = new int[numEle]; // the rows removed
int[] eleSet = new int[numSet]; // the columns removed
// the number of columns that cover a row
int[] weightSet = new int[numSet];
for (int i = 0; i < numSet; i++) {
for (int j = 0; j < numEle; j++) {
if (state[i][j] != 0) {
weightSet[i]++;
}
}
if (weightSet[i] == 0) eleSet[i] = 1;
}
// the number of rows that a column can cover
int[] weightEle = new int[numEle];
for (int i = 0; i < numEle; i++) {
for (int j = 0; j < numSet; j++) {
if (state[j][i] != 0) {
weightEle[i]++;
}
}
if (weightEle[i] == 0) eleEle[i] = 1;
}
// sort the rows and columns
HashMap<Integer, Tools.Set> cmpSet = new HashMap<Integer, Tools.Set>();
for (int i = 0; i < numSet; i++) {
Tools.Set s = new Tools.Set();
s.cost = cost[i];
s.count = weightSet[i];
cmpSet.put(i, s);
}
HashMap<Integer, Integer> cmpEle = new HashMap<Integer, Integer>();
for (int i = 0; i < numEle; i++) {
cmpEle.put(i, weightEle[i]);
}
new Quicksort<Tools.Set, Integer>().sort(sortedSet, cmpSet, Tools.setCmp);
new Quicksort<Integer, Integer>().sort(sortedEle, cmpEle, Tools.intCmp);
// generate the elite columns
int[] mutate = new int[numSet];
for (int i = 0; i < numEle; i++) {
if (eleEle[i] != 0) continue;
int k = 0;
if (weightEle[i] >= 5) k = 5;
else k = weightEle[i];
for (int j = 0; j < numSet; j++) {
int index = sortedSet[j];
if (eleSet[i] != 0) continue;
if (state[index][i] != 0) {
mutate[index] = 1;
k--;
}
if (k == 0) break;
}
}
// generate the initial population
int[][] population = new int[100][numSet];
for (int i = 0; i < numSet; i++) {
if (eleSet[i] != 0) {
for (int j = 0; j < 100; j++) {
population[j][i] = -1;
}
}
}
population(state, eleEle, sortedSet, weightEle, population);
// calculate the fitness information of the population
double[] fitness = new double[100];
for (int i = 0; i < 100; i++) {
fitness[i] = fitness(population[i], cost);
totalFit += fitness[i];
}
avgFit = totalFit / 100;
for (int i = 0; i < 100; i++) {
if (fitness[i] > avgFit) belowFit++;
else if (fitness[i] < bestFit) {
bestFit = fitness[i];
}
}
// main genetic body
int t = 0; // terminate until 100000 new descendants generated
while (t < 100000) {
int[] parents = tournament(population, fitness, 2); // tournament generate two parents
// crossover to generate the child
int[] candidate =
crossover(
population[parents[0]],
population[parents[1]],
fitness[parents[0]],
fitness[parents[1]]);
// mutate the child
mutation(mf, mc, mg, t, candidate, mutate);
// make the child a feasible solution
int[] coverCount = new int[numEle];
for (int i = 0; i < numEle; i++) {
if (eleEle[i] != 0) coverCount[i] = -1;
}
for (int i = 0; i < numSet; i++) {
if (eleSet[i] != 0) continue;
if (candidate[i] > 0) {
for (int j = 0; j < numEle; j++) {
if (eleEle[j] != 0) continue;
if (state[i][j] != 0) coverCount[j]++;
}
}
}
feasible(candidate, state, cost, eleSet, eleEle, sortedEle, sortedSet);
// check if the child is a duplicate of the population, if it is not, update the fitness
// information of the population
// randomly select a solution in population with a below average fitness value, replace this
// solution with the new child
if (!duplicate(population, candidate)) {
int index = -1;
int k = RND.nextInt(belowFit);
for (int i = 0; i < 100; i++) {
if (fitness[i] > avgFit && k > 0) {
k--;
} else if (fitness[i] > avgFit && k == 0) {
index = i;
}
}
totalFit -= fitness[index];
population[index] = candidate;
fitness[index] = fitness(candidate, cost);
totalFit += fitness[index];
avgFit = totalFit / 100;
belowFit = 0;
for (int i = 0; i < 100; i++) {
if (fitness[i] > avgFit) belowFit++;
}
if (fitness[index] < bestFit) {
// record the cpu time that find the best solution
if (bean.isCurrentThreadCpuTimeSupported())
bestTime = bean.getCurrentThreadCpuTime() - time;
bestFit = fitness[index];
}
t++;
}
}
// calculate the end cpu time
if (bean.isCurrentThreadCpuTimeSupported()) time = bean.getCurrentThreadCpuTime() - time;
// return the cpu time and best result
results[0] = bestFit;
results[1] = bestTime;
results[2] = time;
return results;
}
/**
* Retrieve a JVM information text formatted using the given StringManager.
*
* @param requestedSm the StringManager to use
* @return the formatted JVM information text
*/
private static String getVMInfo(StringManager requestedSm) {
StringBuilder sb = new StringBuilder();
synchronized (timeformat) {
sb.append(timeformat.format(new Date()));
}
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoRuntime"));
sb.append(":" + CRLF);
sb.append(INDENT1 + "vmName: " + runtimeMXBean.getVmName() + CRLF);
sb.append(INDENT1 + "vmVersion: " + runtimeMXBean.getVmVersion() + CRLF);
sb.append(INDENT1 + "vmVendor: " + runtimeMXBean.getVmVendor() + CRLF);
sb.append(INDENT1 + "specName: " + runtimeMXBean.getSpecName() + CRLF);
sb.append(INDENT1 + "specVersion: " + runtimeMXBean.getSpecVersion() + CRLF);
sb.append(INDENT1 + "specVendor: " + runtimeMXBean.getSpecVendor() + CRLF);
sb.append(
INDENT1 + "managementSpecVersion: " + runtimeMXBean.getManagementSpecVersion() + CRLF);
sb.append(INDENT1 + "name: " + runtimeMXBean.getName() + CRLF);
sb.append(INDENT1 + "startTime: " + runtimeMXBean.getStartTime() + CRLF);
sb.append(INDENT1 + "uptime: " + runtimeMXBean.getUptime() + CRLF);
sb.append(
INDENT1 + "isBootClassPathSupported: " + runtimeMXBean.isBootClassPathSupported() + CRLF);
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoOs"));
sb.append(":" + CRLF);
sb.append(INDENT1 + "name: " + operatingSystemMXBean.getName() + CRLF);
sb.append(INDENT1 + "version: " + operatingSystemMXBean.getVersion() + CRLF);
sb.append(INDENT1 + "architecture: " + operatingSystemMXBean.getArch() + CRLF);
sb.append(
INDENT1 + "availableProcessors: " + operatingSystemMXBean.getAvailableProcessors() + CRLF);
sb.append(
INDENT1 + "systemLoadAverage: " + operatingSystemMXBean.getSystemLoadAverage() + CRLF);
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoThreadMxBean"));
sb.append(":" + CRLF);
sb.append(
INDENT1
+ "isCurrentThreadCpuTimeSupported: "
+ threadMXBean.isCurrentThreadCpuTimeSupported()
+ CRLF);
sb.append(
INDENT1 + "isThreadCpuTimeSupported: " + threadMXBean.isThreadCpuTimeSupported() + CRLF);
sb.append(INDENT1 + "isThreadCpuTimeEnabled: " + threadMXBean.isThreadCpuTimeEnabled() + CRLF);
sb.append(
INDENT1
+ "isObjectMonitorUsageSupported: "
+ threadMXBean.isObjectMonitorUsageSupported()
+ CRLF);
sb.append(
INDENT1
+ "isSynchronizerUsageSupported: "
+ threadMXBean.isSynchronizerUsageSupported()
+ CRLF);
sb.append(
INDENT1
+ "isThreadContentionMonitoringSupported: "
+ threadMXBean.isThreadContentionMonitoringSupported()
+ CRLF);
sb.append(
INDENT1
+ "isThreadContentionMonitoringEnabled: "
+ threadMXBean.isThreadContentionMonitoringEnabled()
+ CRLF);
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoThreadCounts"));
sb.append(":" + CRLF);
sb.append(INDENT1 + "daemon: " + threadMXBean.getDaemonThreadCount() + CRLF);
sb.append(INDENT1 + "total: " + threadMXBean.getThreadCount() + CRLF);
sb.append(INDENT1 + "peak: " + threadMXBean.getPeakThreadCount() + CRLF);
sb.append(INDENT1 + "totalStarted: " + threadMXBean.getTotalStartedThreadCount() + CRLF);
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoStartup"));
sb.append(":" + CRLF);
for (String arg : runtimeMXBean.getInputArguments()) {
sb.append(INDENT1 + arg + CRLF);
}
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoPath"));
sb.append(":" + CRLF);
sb.append(INDENT1 + "bootClassPath: " + runtimeMXBean.getBootClassPath() + CRLF);
sb.append(INDENT1 + "classPath: " + runtimeMXBean.getClassPath() + CRLF);
sb.append(INDENT1 + "libraryPath: " + runtimeMXBean.getLibraryPath() + CRLF);
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoClassLoading"));
sb.append(":" + CRLF);
sb.append(INDENT1 + "loaded: " + classLoadingMXBean.getLoadedClassCount() + CRLF);
sb.append(INDENT1 + "unloaded: " + classLoadingMXBean.getUnloadedClassCount() + CRLF);
sb.append(INDENT1 + "totalLoaded: " + classLoadingMXBean.getTotalLoadedClassCount() + CRLF);
sb.append(INDENT1 + "isVerbose: " + classLoadingMXBean.isVerbose() + CRLF);
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoClassCompilation"));
sb.append(":" + CRLF);
sb.append(INDENT1 + "name: " + compilationMXBean.getName() + CRLF);
sb.append(
INDENT1 + "totalCompilationTime: " + compilationMXBean.getTotalCompilationTime() + CRLF);
sb.append(
INDENT1
+ "isCompilationTimeMonitoringSupported: "
+ compilationMXBean.isCompilationTimeMonitoringSupported()
+ CRLF);
sb.append(CRLF);
for (MemoryManagerMXBean mbean : memoryManagerMXBeans) {
sb.append(requestedSm.getString("diagnostics.vmInfoMemoryManagers", mbean.getName()));
sb.append(":" + CRLF);
sb.append(INDENT1 + "isValid: " + mbean.isValid() + CRLF);
sb.append(INDENT1 + "mbean.getMemoryPoolNames: " + CRLF);
String[] names = mbean.getMemoryPoolNames();
Arrays.sort(names);
for (String name : names) {
sb.append(INDENT2 + name + CRLF);
}
sb.append(CRLF);
}
for (GarbageCollectorMXBean mbean : garbageCollectorMXBeans) {
sb.append(requestedSm.getString("diagnostics.vmInfoGarbageCollectors", mbean.getName()));
sb.append(":" + CRLF);
sb.append(INDENT1 + "isValid: " + mbean.isValid() + CRLF);
sb.append(INDENT1 + "mbean.getMemoryPoolNames: " + CRLF);
String[] names = mbean.getMemoryPoolNames();
Arrays.sort(names);
for (String name : names) {
sb.append(INDENT2 + name + CRLF);
}
sb.append(INDENT1 + "getCollectionCount: " + mbean.getCollectionCount() + CRLF);
sb.append(INDENT1 + "getCollectionTime: " + mbean.getCollectionTime() + CRLF);
sb.append(CRLF);
}
sb.append(requestedSm.getString("diagnostics.vmInfoMemory"));
sb.append(":" + CRLF);
sb.append(INDENT1 + "isVerbose: " + memoryMXBean.isVerbose() + CRLF);
sb.append(
INDENT1
+ "getObjectPendingFinalizationCount: "
+ memoryMXBean.getObjectPendingFinalizationCount()
+ CRLF);
sb.append(formatMemoryUsage("heap", memoryMXBean.getHeapMemoryUsage()));
sb.append(formatMemoryUsage("non-heap", memoryMXBean.getNonHeapMemoryUsage()));
sb.append(CRLF);
for (MemoryPoolMXBean mbean : memoryPoolMXBeans) {
sb.append(requestedSm.getString("diagnostics.vmInfoMemoryPools", mbean.getName()));
sb.append(":" + CRLF);
sb.append(INDENT1 + "isValid: " + mbean.isValid() + CRLF);
sb.append(INDENT1 + "getType: " + mbean.getType() + CRLF);
sb.append(INDENT1 + "mbean.getMemoryManagerNames: " + CRLF);
String[] names = mbean.getMemoryManagerNames();
Arrays.sort(names);
for (String name : names) {
sb.append(INDENT2 + name + CRLF);
}
sb.append(INDENT1 + "isUsageThresholdSupported: " + mbean.isUsageThresholdSupported() + CRLF);
try {
sb.append(INDENT1 + "isUsageThresholdExceeded: " + mbean.isUsageThresholdExceeded() + CRLF);
} catch (UnsupportedOperationException ex) {
// IGNORE
}
sb.append(
INDENT1
+ "isCollectionUsageThresholdSupported: "
+ mbean.isCollectionUsageThresholdSupported()
+ CRLF);
try {
sb.append(
INDENT1
+ "isCollectionUsageThresholdExceeded: "
+ mbean.isCollectionUsageThresholdExceeded()
+ CRLF);
} catch (UnsupportedOperationException ex) {
// IGNORE
}
try {
sb.append(INDENT1 + "getUsageThreshold: " + mbean.getUsageThreshold() + CRLF);
} catch (UnsupportedOperationException ex) {
// IGNORE
}
try {
sb.append(INDENT1 + "getUsageThresholdCount: " + mbean.getUsageThresholdCount() + CRLF);
} catch (UnsupportedOperationException ex) {
// IGNORE
}
try {
sb.append(
INDENT1 + "getCollectionUsageThreshold: " + mbean.getCollectionUsageThreshold() + CRLF);
} catch (UnsupportedOperationException ex) {
// IGNORE
}
try {
sb.append(
INDENT1
+ "getCollectionUsageThresholdCount: "
+ mbean.getCollectionUsageThresholdCount()
+ CRLF);
} catch (UnsupportedOperationException ex) {
// IGNORE
}
sb.append(formatMemoryUsage("current", mbean.getUsage()));
sb.append(formatMemoryUsage("collection", mbean.getCollectionUsage()));
sb.append(formatMemoryUsage("peak", mbean.getPeakUsage()));
sb.append(CRLF);
}
sb.append(requestedSm.getString("diagnostics.vmInfoSystem"));
sb.append(":" + CRLF);
Map<String, String> props = runtimeMXBean.getSystemProperties();
ArrayList<String> keys = new ArrayList<String>(props.keySet());
Collections.sort(keys);
for (String prop : keys) {
sb.append(INDENT1 + prop + ": " + props.get(prop) + CRLF);
}
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.vmInfoLogger"));
sb.append(":" + CRLF);
List<String> loggers = loggingMXBean.getLoggerNames();
Collections.sort(loggers);
for (String logger : loggers) {
sb.append(
INDENT1
+ logger
+ ": level="
+ loggingMXBean.getLoggerLevel(logger)
+ ", parent="
+ loggingMXBean.getParentLoggerName(logger)
+ CRLF);
}
sb.append(CRLF);
return sb.toString();
}
protected long getTimeInMilliseconds() {
if (bean.isCurrentThreadCpuTimeSupported())
return bean.getCurrentThreadCpuTime() / nanosecondsPerMillisecond;
else return System.nanoTime() / nanosecondsPerMillisecond;
}
private static long getCpuTime() {
ThreadMXBean bean = ManagementFactory.getThreadMXBean();
return bean.isCurrentThreadCpuTimeSupported() ? bean.getCurrentThreadCpuTime() : 0L;
}