org.cometd.benchmark.BenchmarkHelper Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.cometd.benchmark;
import java.lang.management.CompilationMXBean;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryPoolMXBean;
import java.lang.management.MemoryUsage;
import java.lang.management.OperatingSystemMXBean;
import java.util.Date;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
public class BenchmarkHelper implements Runnable
{
private final OperatingSystemMXBean operatingSystem;
private final CompilationMXBean jitCompiler;
private final MemoryMXBean heapMemory;
private final AtomicInteger starts = new AtomicInteger();
private volatile MemoryPoolMXBean youngMemoryPool;
private volatile MemoryPoolMXBean survivorMemoryPool;
private volatile MemoryPoolMXBean oldMemoryPool;
private volatile boolean hasMemoryPools;
private volatile ScheduledFuture memoryPoller;
private volatile GarbageCollectorMXBean youngCollector;
private volatile GarbageCollectorMXBean oldCollector;
private volatile boolean hasCollectors;
private volatile ScheduledExecutorService scheduler;
private volatile boolean polling;
private volatile long lastYoungUsed;
private volatile long startYoungCollections;
private volatile long startYoungCollectionsTime;
private volatile long totalYoungUsed;
private volatile long lastSurvivorUsed;
private volatile long totalSurvivorUsed;
private volatile long lastOldUsed;
private volatile long startOldCollections;
private volatile long startOldCollectionsTime;
private volatile long totalOldUsed;
private volatile long startTime;
private volatile long startProcessCPUTime;
private volatile long startJITCTime;
public BenchmarkHelper()
{
this.operatingSystem = ManagementFactory.getOperatingSystemMXBean();
this.jitCompiler = ManagementFactory.getCompilationMXBean();
this.heapMemory = ManagementFactory.getMemoryMXBean();
List memoryPools = ManagementFactory.getMemoryPoolMXBeans();
for (MemoryPoolMXBean memoryPool : memoryPools)
{
if ("PS Eden Space".equals(memoryPool.getName()) ||
"Par Eden Space".equals(memoryPool.getName()) ||
"G1 Eden".equals(memoryPool.getName()))
youngMemoryPool = memoryPool;
else if ("PS Survivor Space".equals(memoryPool.getName()) ||
"Par Survivor Space".equals(memoryPool.getName()) ||
"G1 Survivor".equals(memoryPool.getName()))
survivorMemoryPool = memoryPool;
else if ("PS Old Gen".equals(memoryPool.getName()) ||
"CMS Old Gen".equals(memoryPool.getName()) ||
"G1 Old Gen".equals(memoryPool.getName()))
oldMemoryPool = memoryPool;
}
hasMemoryPools = youngMemoryPool != null && survivorMemoryPool != null && oldMemoryPool != null;
List garbageCollectors = ManagementFactory.getGarbageCollectorMXBeans();
for (GarbageCollectorMXBean garbageCollector : garbageCollectors)
{
if ("PS Scavenge".equals(garbageCollector.getName()) ||
"ParNew".equals(garbageCollector.getName()) ||
"G1 Young Generation".equals(garbageCollector.getName()))
youngCollector = garbageCollector;
else if ("PS MarkSweep".equals(garbageCollector.getName()) ||
"ConcurrentMarkSweep".equals(garbageCollector.getName()) ||
"G1 Old Generation".equals(garbageCollector.getName()))
oldCollector = garbageCollector;
}
hasCollectors = youngCollector != null && oldCollector != null;
}
public void run()
{
if (!hasMemoryPools)
return;
long young = youngMemoryPool.getUsage().getUsed();
long survivor = survivorMemoryPool.getUsage().getUsed();
long old = oldMemoryPool.getUsage().getUsed();
if (!polling)
{
polling = true;
}
else
{
if (lastYoungUsed <= young)
{
totalYoungUsed += young - lastYoungUsed;
}
if (lastSurvivorUsed <= survivor)
{
totalSurvivorUsed += survivor - lastSurvivorUsed;
}
if (lastOldUsed <= old)
{
totalOldUsed += old - lastOldUsed;
}
else
{
// May need something more here, like "how much was collected"
}
}
lastYoungUsed = young;
lastSurvivorUsed = survivor;
lastOldUsed = old;
}
public boolean startStatistics()
{
// Support for multiple nodes requires to ignore start requests after the first
// but also requires that requests after the first wait until the initialization
// is completed (otherwise node #2 may start the run while the server is GC'ing)
synchronized (this)
{
if (starts.incrementAndGet() > 1)
return false;
System.gc();
System.err.println("\n========================================");
System.err.println("Statistics Started at " + new Date());
System.err.println("Operative System: " + operatingSystem.getName() + " " + operatingSystem.getVersion() + " " + operatingSystem.getArch());
System.err.println("JVM : " + System.getProperty("java.vm.vendor") + " " + System.getProperty("java.vm.name") + " runtime " + System.getProperty("java.vm.version") + " " + System.getProperty("java.runtime.version"));
System.err.println("Processors: " + operatingSystem.getAvailableProcessors());
if (operatingSystem instanceof com.sun.management.OperatingSystemMXBean)
{
com.sun.management.OperatingSystemMXBean os = (com.sun.management.OperatingSystemMXBean)operatingSystem;
long totalMemory = os.getTotalPhysicalMemorySize();
long freeMemory = os.getFreePhysicalMemorySize();
System.err.println("System Memory: " + percent(totalMemory - freeMemory, totalMemory) + "% used of " + gibiBytes(totalMemory) + " GiB");
}
else
{
System.err.println("System Memory: N/A");
}
MemoryUsage heapMemoryUsage = heapMemory.getHeapMemoryUsage();
System.err.println("Used Heap Size: " + mebiBytes(heapMemoryUsage.getUsed()) + " MiB");
System.err.println("Max Heap Size: " + mebiBytes(heapMemoryUsage.getMax()) + " MiB");
if (hasMemoryPools)
{
long youngGenerationHeap = heapMemoryUsage.getMax() - oldMemoryPool.getUsage().getMax();
System.err.println("Young Generation Heap Size: " + mebiBytes(youngGenerationHeap) + " MiB");
}
else
{
System.err.println("Young Generation Heap Size: N/A");
}
System.err.println("- - - - - - - - - - - - - - - - - - - - ");
scheduler = Executors.newSingleThreadScheduledExecutor();
polling = false;
memoryPoller = scheduler.scheduleWithFixedDelay(this, 0, 250, TimeUnit.MILLISECONDS);
lastYoungUsed = 0;
if (hasCollectors)
{
startYoungCollections = youngCollector.getCollectionCount();
startYoungCollectionsTime = youngCollector.getCollectionTime();
}
totalYoungUsed = 0;
lastSurvivorUsed = 0;
totalSurvivorUsed = 0;
lastOldUsed = 0;
if (hasCollectors)
{
startOldCollections = oldCollector.getCollectionCount();
startOldCollectionsTime = oldCollector.getCollectionTime();
}
totalOldUsed = 0;
startTime = System.nanoTime();
if (operatingSystem instanceof com.sun.management.OperatingSystemMXBean)
{
com.sun.management.OperatingSystemMXBean os = (com.sun.management.OperatingSystemMXBean)operatingSystem;
startProcessCPUTime = os.getProcessCpuTime();
}
startJITCTime = jitCompiler.getTotalCompilationTime();
return true;
}
}
public boolean stopStatistics()
{
synchronized (this)
{
if (starts.decrementAndGet() > 0)
return false;
memoryPoller.cancel(false);
scheduler.shutdown();
System.err.println("- - - - - - - - - - - - - - - - - - - - ");
System.err.println("Statistics Ended at " + new Date());
long elapsedTime = System.nanoTime() - startTime;
System.err.println("Elapsed time: " + TimeUnit.NANOSECONDS.toMillis(elapsedTime) + " ms");
long elapsedJITCTime = jitCompiler.getTotalCompilationTime() - startJITCTime;
System.err.println("\tTime in JIT compilation: " + elapsedJITCTime + " ms");
if (hasCollectors)
{
long elapsedYoungCollectionsTime = youngCollector.getCollectionTime() - startYoungCollectionsTime;
long youngCollections = youngCollector.getCollectionCount() - startYoungCollections;
System.err.println("\tTime in Young Generation GC: " + elapsedYoungCollectionsTime + " ms (" + youngCollections + " collections)");
long elapsedOldCollectionsTime = oldCollector.getCollectionTime() - startOldCollectionsTime;
long oldCollections = oldCollector.getCollectionCount() - startOldCollections;
System.err.println("\tTime in Old Generation GC: " + elapsedOldCollectionsTime + " ms (" + oldCollections + " collections)");
}
else
{
System.err.println("\tTime in GC: N/A");
}
if (hasMemoryPools)
{
System.err.println("Garbage Generated in Young Generation: " + mebiBytes(totalYoungUsed) + " MiB");
System.err.println("Garbage Generated in Survivor Generation: " + mebiBytes(totalSurvivorUsed) + " MiB");
System.err.println("Garbage Generated in Old Generation: " + mebiBytes(totalOldUsed) + " MiB");
}
else
{
System.err.println("Garbage Generated: N/A");
}
if (operatingSystem instanceof com.sun.management.OperatingSystemMXBean)
{
com.sun.management.OperatingSystemMXBean os = (com.sun.management.OperatingSystemMXBean)operatingSystem;
long elapsedProcessCPUTime = os.getProcessCpuTime() - startProcessCPUTime;
System.err.println("Average CPU Load: " + ((float)elapsedProcessCPUTime * 100 / elapsedTime) + "/" + (100 * operatingSystem.getAvailableProcessors()));
}
else
{
System.err.println("Average CPU Load: N/A");
}
System.err.println("----------------------------------------\n");
return true;
}
}
public float percent(long dividend, long divisor)
{
return (float)dividend * 100 / divisor;
}
public float mebiBytes(long bytes)
{
return (float)bytes / 1024 / 1024;
}
public float gibiBytes(long bytes)
{
return (float)bytes / 1024 / 1024 / 1024;
}
}
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