43 
  44     /**
  45      * Constructor of HotspotThread class.
  46      */
  47     HotspotThread(VMManagement vm) {
  48         jvm = vm;
  49     }
  50 
  51     public native int getInternalThreadCount();
  52 
  53     public Map<String, Long> getInternalThreadCpuTimes() {
  54         int count = getInternalThreadCount();
  55         if (count == 0) {
  56             return java.util.Collections.emptyMap();
  57         }
  58         String[] names = new String[count];
  59         long[] times = new long[count];
  60         int numThreads = getInternalThreadTimes0(names, times);
  61         Map<String, Long> result = new HashMap<>(numThreads);
  62         for (int i = 0; i < numThreads; i++) {
  63             result.put(names[i], new Long(times[i]));
  64         }
  65         return result;
  66     }
  67     public native int getInternalThreadTimes0(String[] names, long[] times);
  68 
  69     // Performance counter support
  70     private static final String JAVA_THREADS    = "java.threads.";
  71     private static final String COM_SUN_THREADS = "com.sun.threads.";
  72     private static final String SUN_THREADS     = "sun.threads.";
  73     private static final String THREADS_COUNTER_NAME_PATTERN =
  74         JAVA_THREADS + "|" + COM_SUN_THREADS + "|" + SUN_THREADS;
  75 
  76     public java.util.List<Counter> getInternalThreadingCounters() {
  77         return jvm.getInternalCounters(THREADS_COUNTER_NAME_PATTERN);
  78     }
  79 }

  43 
  44     /**
  45      * Constructor of HotspotThread class.
  46      */
  47     HotspotThread(VMManagement vm) {
  48         jvm = vm;
  49     }
  50 
  51     public native int getInternalThreadCount();
  52 
  53     public Map<String, Long> getInternalThreadCpuTimes() {
  54         int count = getInternalThreadCount();
  55         if (count == 0) {
  56             return java.util.Collections.emptyMap();
  57         }
  58         String[] names = new String[count];
  59         long[] times = new long[count];
  60         int numThreads = getInternalThreadTimes0(names, times);
  61         Map<String, Long> result = new HashMap<>(numThreads);
  62         for (int i = 0; i < numThreads; i++) {
  63             result.put(names[i], times[i]);
  64         }
  65         return result;
  66     }
  67     public native int getInternalThreadTimes0(String[] names, long[] times);
  68 
  69     // Performance counter support
  70     private static final String JAVA_THREADS    = "java.threads.";
  71     private static final String COM_SUN_THREADS = "com.sun.threads.";
  72     private static final String SUN_THREADS     = "sun.threads.";
  73     private static final String THREADS_COUNTER_NAME_PATTERN =
  74         JAVA_THREADS + "|" + COM_SUN_THREADS + "|" + SUN_THREADS;
  75 
  76     public java.util.List<Counter> getInternalThreadingCounters() {
  77         return jvm.getInternalCounters(THREADS_COUNTER_NAME_PATTERN);
  78     }
  79 }