import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams,
                                                   IterationParams iterationParams,
                                                   IterationResult result) {
    final ArrayList<Result> results = Lists.newArrayList();
    if (metricRegistry == null) {
        return results;
    }
    final SortedMap<String, Meter> counters = metricRegistry.getMeters((name, metric) -> {
        return name.startsWith(MetricRegistry.name(Rule.class)) || name.startsWith(MetricRegistry.name(Pipeline.class));
    });
    counters.entrySet()
            .forEach(stringCounterEntry -> result.addResult(new ScalarResult(stringCounterEntry.getKey(),
                                                                             stringCounterEntry.getValue().getCount(),
                                                                             "calls",
                                                                             AggregationPolicy.SUM)));

    return results;
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams,
    IterationParams iterationParams, IterationResult result) {
  final Runtime runtime = Runtime.getRuntime();

  final long max = runtime.maxMemory();
  final long total = runtime.totalMemory();
  final long free = runtime.freeMemory();
  final long used = total - free;

  return Arrays
      .asList(new ProfilerResult(PREFIX + "rt.mem.max", max, "bytes", AggregationPolicy.MAX),
          new ProfilerResult(PREFIX + "rt.mem.total", total, "bytes", AggregationPolicy.MAX),
          new ProfilerResult(PREFIX + "rt.mem.free", free, "bytes", AggregationPolicy.MAX),
          new ProfilerResult(PREFIX + "rt.mem.used", used, "bytes", AggregationPolicy.MAX));
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams, IterationParams iterationParams) {
    Map<String, Long> current = counters().getCurrent();
    return Arrays.asList(
            new ProfilerResult("@threads.alive",
                    current.get("java.threads.live"),
                    "threads", AggregationPolicy.AVG),

            new ProfilerResult("@threads.daemon",
                    current.get("java.threads.daemon"),
                    "threads", AggregationPolicy.AVG),

            new ProfilerResult("@threads.started",
                    current.get("java.threads.started"),
                    "threads", AggregationPolicy.MAX)
    );
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams, IterationParams iterationParams) {
    long gcTime = 0;
    long gcCount = 0;
    for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
        gcCount += bean.getCollectionCount();
        gcTime += bean.getCollectionTime();
    }

    return Arrays.asList(
            new ProfilerResult("@gc.count.profiled", gcCount - beforeGCCount, "counts", AggregationPolicy.SUM),
            new ProfilerResult("@gc.count.total", gcCount, "counts", AggregationPolicy.MAX),
            new ProfilerResult("@gc.time.profiled", gcTime - beforeGCTime, "ms", AggregationPolicy.SUM),
            new ProfilerResult("@gc.time.total", gcTime, "ms", AggregationPolicy.MAX)
    );
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
/**
 * Parse the linux {@code /proc/self/status} and add everything prefixed with "Vm" as metric to
 * the profiling result.
 */
private static void addLinuxVmStats(List<Result> l) {
  try {
    LineNumberReader r = new LineNumberReader(new InputStreamReader(new FileInputStream("/proc/self/status")));
    String _line;
    while ((_line = r.readLine()) != null) {
      if (!_line.startsWith("Vm")) {
        continue;
      }
      String[] sa = _line.split("\\s+");
      if (sa.length != 3) {
        throw new IOException("Format error: 3 elements expected");
      }
      if (!sa[2].equals("kB")) {
        throw new IOException("Format error: unit kB expected, was: " + sa[2]);
      }
      String _name = sa[0].substring(0, sa[0].length() - 1);
      l.add(
        new ScalarResult("+linux.proc.status." + _name, (double) Long.parseLong(sa[1]), "kB", AggregationPolicy.AVG)
      );
    }
  } catch (IOException ex) {
    throw new UncheckedIOException(ex);
  }
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@TearDown(Level.Iteration)
public void tearDown() {
  synchronized (LOCK) {
    if (hitCount > 0) {
      addCounterResult("hitCount", hitCount, "hit", AggregationPolicy.AVG);
    }
    if (missCount > 0) {
      addCounterResult("missCount", missCount, "miss", AggregationPolicy.AVG);
    }
    if (opCount == 0) {
      opCount = hitCount + missCount;
    }
    addCounterResult("opCount", opCount, "op", AggregationPolicy.AVG);
    updateHitrate("tearDown(), hitCount=" + hitCount + ", missCount=" + missCount + ", opCount=" + opCount);
    hitCount = missCount = opCount = 0;
  }
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
public static void recordStats(String _statisticsString) {
  if (before == null) {
    throw new IllegalStateException("saveStats() needs to be called before iteration.");
  }
  Stat now = extract(_statisticsString);
  long _scanCount = now.scanCount - before.scanCount;
  long _evictCount = now.evictCount - before.evictCount;
  long _getCount = now.getCount - before.getCount;
  List<Result> l = new ArrayList<>();
  l.add(new ScalarResult(RESULT_PREFIX + "scanCount", _scanCount, "counter", AggregationPolicy.AVG));
  l.add(new ScalarResult(RESULT_PREFIX + "evictCount", _evictCount, "counter", AggregationPolicy.AVG));
  l.add(new ScalarResult(RESULT_PREFIX + "getCount", _getCount, "counter", AggregationPolicy.AVG));
  if (_evictCount > 0) {
    l.add(new ScalarResult(RESULT_PREFIX + "scanPerEviction", _scanCount * 1.0D / _evictCount, "counter", AggregationPolicy.AVG));
  }
  l.forEach(MiscResultRecorderProfiler::setResult);
  before = now;
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
/**
 * Parse the linux {@code /proc/self/status} and add everything prefixed with "Vm" as metric to
 * the profiling result.
 */
private static void addLinuxVmStats(List<Result> l) {
  try {
    LineNumberReader r = new LineNumberReader(new InputStreamReader(new FileInputStream("/proc/self/status")));
    String _line;
    while ((_line = r.readLine()) != null) {
      if (!_line.startsWith("Vm")) {
        continue;
      }
      String[] sa = _line.split("\\s+");
      if (sa.length != 3) {
        throw new IOException("Format error: 3 elements expected");
      }
      if (!sa[2].equals("kB")) {
        throw new IOException("Format error: unit kB expected, was: " + sa[2]);
      }
      String _name = sa[0].substring(0, sa[0].length() - 1);
      l.add(
        new ScalarResult("+forced-gc-mem.used." + _name, (double) Long.parseLong(sa[1]), "kB", AggregationPolicy.AVG)
      );
    }
  } catch (IOException ex) {
    throw new UncheckedIOException(ex);
  }
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(final BenchmarkParams benchmarkParams, final IterationParams iterationParams, final IterationResult result) {
  if (usedMemory <= 0) {
    recordUsedMemory();
    if (usedMemory <= 0) {
      return Collections.emptyList();
    }
  }
  List<Result> l = new ArrayList<>();
  addLinuxVmStats(l);
  l.addAll(Arrays.asList(
    new ScalarResult("+forced-gc-mem.used.settled", (double) usedMemorySettled, "bytes", AggregationPolicy.AVG),
    new ScalarResult("+forced-gc-mem.used.after", (double) usedMemory, "bytes", AggregationPolicy.AVG),
    new ScalarResult("+forced-gc-mem.total", (double) totalMemory, "bytes", AggregationPolicy.AVG),
    new ScalarResult("+forced-gc-mem.gcTimeMillis", (double) gcTimeMillis, "ms", AggregationPolicy.AVG),
    new ScalarResult("+forced-gc-mem.usedHeap", (double) usedHeapMemory, "bytes", AggregationPolicy.AVG)
  ));
  keepReference = null;
  return l;
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
/**
 * Run this code after a benchmark iteration finished
 *
 * @param benchmarkParams benchmark parameters used for current launch
 * @param iterationParams iteration parameters used for current launch
 * @param result iteration result
 * @return profiler results
 */
@Override
public Collection<? extends Result<ProfilerResult>> afterIteration(
    BenchmarkParams benchmarkParams, IterationParams iterationParams, IterationResult result) {
  String unit = "invocations";
  AggregationPolicy policy = AggregationPolicy.AVG;

  final ProfilerResult hashCodeResult =
      new ProfilerResult("hashCode", CountingInteger.getHashcodeCounter(), unit, policy);

  final ProfilerResult equalsResult =
      new ProfilerResult("equals", CountingInteger.getEqualsCounter(), unit, policy);

  return Arrays.asList(hashCodeResult, equalsResult);
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams, IterationParams iterationParams) {
    long compTime = -startCompTime;
    CompilationMXBean comp = ManagementFactory.getCompilationMXBean();
    try {
        compTime += comp.getTotalCompilationTime();
    } catch (UnsupportedOperationException e) {
        compTime = -1;
    }

    return Arrays.asList(
            new ProfilerResult("@compiler.time.profiled", compTime, "ms", AggregationPolicy.SUM),
            new ProfilerResult("@compiler.time.total", comp.getTotalCompilationTime(), "ms", AggregationPolicy.MAX)
    );
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams, IterationParams iterationParams) {
    HotspotInternalResult res = counters();
    Collection<ProfilerResult> results = new ArrayList<ProfilerResult>();
    for (Map.Entry<String, Long> e : res.getDiff().entrySet()) {
        results.add(new ProfilerResult("@unknown." + e.getKey(), e.getValue(), "unit?", AggregationPolicy.AVG));
    }
    return results;
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
public static void recordOpCount(long _opCount) {
  synchronized (LOCK) {
    addCounterResult(
      "opCount", _opCount, "op", AggregationPolicy.AVG
    );
    updateHitrate("ops=" + _opCount);
  }
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
public static void recordMissCount(long _missCount) {
  synchronized (LOCK) {
    addCounterResult(
      "missCount", _missCount, "op", AggregationPolicy.AVG
    );
    updateHitrate("miss=" + _missCount);
  }
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
/** Called for each thread */
private static void updateHitrate(String s) {
  long _missCountSum = getCounterResult("missCount");
  long _opCountSum = getCounterResult("opCount");
  if (_opCountSum == 0L) {
    return;
  }
  double _hitRate = 100.0 - _missCountSum * 100.0 / _opCountSum;
  System.err.println(Thread.currentThread() + " " + s + ", opSum=" + _opCountSum + ", missSum=" + _missCountSum + ", hitRate=" + _hitRate);
  setResult("hitrate", _hitRate, "percent", AggregationPolicy.AVG);
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
/**
 * Insert the counter value as secondary result. If a value is already inserted the
 * counter value is added to the existing one. This can be used to collect and sum up
 * results from different threads.
 */
public static void addCounterResult(String key, long _counter, String _unit, AggregationPolicy _aggregationPolicy) {
  CounterResult r = counters.computeIfAbsent(key, any -> new CounterResult());
  r.aggregationPolicy = _aggregationPolicy;
  r.unit = _unit;
  r.counter.addAndGet(_counter);
  r.key = key;
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
public NoResult(String output) {
    super(ResultRole.SECONDARY, "JFR", of(Double.NaN), "N/A", AggregationPolicy.SUM);

    this.output = output;
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
public LogConsumeResult(String label, Collection<String> lines) {
    super(ResultRole.SECONDARY, "log" + label, of(Double.NaN), "N/A", AggregationPolicy.MAX);
    this.lines = lines;
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
public ProfilerResult(String label, double n, String unit, AggregationPolicy policy) {
    this(label, of(n), unit, policy);
}
 

import org.openjdk.jmh.results.AggregationPolicy; //导入依赖的package包/类
@Override
public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams, IterationParams iterationParams) {
    Map<String, Long> current = counters().getCurrent();
    return Arrays.asList(
            new ProfilerResult("@compiler.totalTime",
                    TimeUnit.NANOSECONDS.toMillis(current.get("java.ci.totalTime")),
                    "ms", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.totalCompiles",
                    current.get("sun.ci.totalCompiles"),
                    "methods", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.totalBailouts",
                    current.get("sun.ci.totalBailouts"),
                    "methods", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.totalInvalidates",
                    current.get("sun.ci.totalInvalidates"),
                    "methods", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.nmethodCodeSize",
                    current.get("sun.ci.nmethodCodeSize")/ 1024,
                    "Kb", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.nmethodSize",
                    current.get("sun.ci.nmethodSize") / 1024,
                    "Kb", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.osrCompiles",
                    current.get("sun.ci.osrCompiles"),
                    "methods", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.osrBytes",
                    current.get("sun.ci.osrBytes") / 1024,
                    "Kb", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.osrTime",
                    TimeUnit.NANOSECONDS.toMillis(current.get("sun.ci.osrTime")),
                    "ms", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.standardCompiles",
                    current.get("sun.ci.standardCompiles"),
                    "methods", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.standardBytes",
                    current.get("sun.ci.standardBytes") / 1024,
                    "Kb", AggregationPolicy.MAX),

            new ProfilerResult("@compiler.standardTime",
                    TimeUnit.NANOSECONDS.toMillis(current.get("sun.ci.standardTime")),
                    "ms", AggregationPolicy.MAX)
    );
}