| /* |
| * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.tools; |
| |
| import java.util.*; |
| import sun.jvm.hotspot.gc_interface.*; |
| import sun.jvm.hotspot.gc_implementation.g1.*; |
| import sun.jvm.hotspot.gc_implementation.parallelScavenge.*; |
| import sun.jvm.hotspot.gc_implementation.shared.*; |
| import sun.jvm.hotspot.debugger.JVMDebugger; |
| import sun.jvm.hotspot.memory.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.runtime.*; |
| |
| public class HeapSummary extends Tool { |
| |
| public HeapSummary() { |
| super(); |
| } |
| |
| public HeapSummary(JVMDebugger d) { |
| super(d); |
| } |
| |
| public static void main(String[] args) { |
| HeapSummary hs = new HeapSummary(); |
| hs.execute(args); |
| } |
| |
| public void run() { |
| CollectedHeap heap = VM.getVM().getUniverse().heap(); |
| VM.Flag[] flags = VM.getVM().getCommandLineFlags(); |
| Map flagMap = new HashMap(); |
| if (flags == null) { |
| System.out.println("WARNING: command line flags are not available"); |
| } else { |
| for (int f = 0; f < flags.length; f++) { |
| flagMap.put(flags[f].getName(), flags[f]); |
| } |
| } |
| |
| System.out.println(); |
| printGCAlgorithm(flagMap); |
| System.out.println(); |
| System.out.println("Heap Configuration:"); |
| printValue("MinHeapFreeRatio = ", getFlagValue("MinHeapFreeRatio", flagMap)); |
| printValue("MaxHeapFreeRatio = ", getFlagValue("MaxHeapFreeRatio", flagMap)); |
| printValMB("MaxHeapSize = ", getFlagValue("MaxHeapSize", flagMap)); |
| printValMB("NewSize = ", getFlagValue("NewSize", flagMap)); |
| printValMB("MaxNewSize = ", getFlagValue("MaxNewSize", flagMap)); |
| printValMB("OldSize = ", getFlagValue("OldSize", flagMap)); |
| printValue("NewRatio = ", getFlagValue("NewRatio", flagMap)); |
| printValue("SurvivorRatio = ", getFlagValue("SurvivorRatio", flagMap)); |
| printValMB("MetaspaceSize = ", getFlagValue("MetaspaceSize", flagMap)); |
| printValMB("CompressedClassSpaceSize = ", getFlagValue("CompressedClassSpaceSize", flagMap)); |
| printValMB("MaxMetaspaceSize = ", getFlagValue("MaxMetaspaceSize", flagMap)); |
| printValMB("G1HeapRegionSize = ", HeapRegion.grainBytes()); |
| |
| System.out.println(); |
| System.out.println("Heap Usage:"); |
| |
| if (heap instanceof SharedHeap) { |
| SharedHeap sharedHeap = (SharedHeap) heap; |
| if (sharedHeap instanceof GenCollectedHeap) { |
| GenCollectedHeap genHeap = (GenCollectedHeap) sharedHeap; |
| for (int n = 0; n < genHeap.nGens(); n++) { |
| Generation gen = genHeap.getGen(n); |
| if (gen instanceof sun.jvm.hotspot.memory.DefNewGeneration) { |
| System.out.println("New Generation (Eden + 1 Survivor Space):"); |
| printGen(gen); |
| |
| ContiguousSpace eden = ((DefNewGeneration)gen).eden(); |
| System.out.println("Eden Space:"); |
| printSpace(eden); |
| |
| ContiguousSpace from = ((DefNewGeneration)gen).from(); |
| System.out.println("From Space:"); |
| printSpace(from); |
| |
| ContiguousSpace to = ((DefNewGeneration)gen).to(); |
| System.out.println("To Space:"); |
| printSpace(to); |
| } else { |
| System.out.println(gen.name() + ":"); |
| printGen(gen); |
| } |
| } |
| } else if (sharedHeap instanceof G1CollectedHeap) { |
| G1CollectedHeap g1h = (G1CollectedHeap) sharedHeap; |
| G1MonitoringSupport g1mm = g1h.g1mm(); |
| long edenRegionNum = g1mm.edenRegionNum(); |
| long survivorRegionNum = g1mm.survivorRegionNum(); |
| HeapRegionSetBase oldSet = g1h.oldSet(); |
| HeapRegionSetBase humongousSet = g1h.humongousSet(); |
| long oldRegionNum = oldSet.count().length() |
| + humongousSet.count().capacity() / HeapRegion.grainBytes(); |
| printG1Space("G1 Heap:", g1h.n_regions(), |
| g1h.used(), g1h.capacity()); |
| System.out.println("G1 Young Generation:"); |
| printG1Space("Eden Space:", edenRegionNum, |
| g1mm.edenUsed(), g1mm.edenCommitted()); |
| printG1Space("Survivor Space:", survivorRegionNum, |
| g1mm.survivorUsed(), g1mm.survivorCommitted()); |
| printG1Space("G1 Old Generation:", oldRegionNum, |
| g1mm.oldUsed(), g1mm.oldCommitted()); |
| } else { |
| throw new RuntimeException("unknown SharedHeap type : " + heap.getClass()); |
| } |
| } else if (heap instanceof ParallelScavengeHeap) { |
| ParallelScavengeHeap psh = (ParallelScavengeHeap) heap; |
| PSYoungGen youngGen = psh.youngGen(); |
| printPSYoungGen(youngGen); |
| |
| PSOldGen oldGen = psh.oldGen(); |
| long oldFree = oldGen.capacity() - oldGen.used(); |
| System.out.println("PS Old Generation"); |
| printValMB("capacity = ", oldGen.capacity()); |
| printValMB("used = ", oldGen.used()); |
| printValMB("free = ", oldFree); |
| System.out.println(alignment + (double)oldGen.used() * 100.0 / oldGen.capacity() + "% used"); |
| } else { |
| throw new RuntimeException("unknown CollectedHeap type : " + heap.getClass()); |
| } |
| |
| System.out.println(); |
| printInternStringStatistics(); |
| } |
| |
| // Helper methods |
| |
| private void printGCAlgorithm(Map flagMap) { |
| // print about new generation |
| long l = getFlagValue("UseParNewGC", flagMap); |
| if (l == 1L) { |
| System.out.println("using parallel threads in the new generation."); |
| } |
| |
| l = getFlagValue("UseTLAB", flagMap); |
| if (l == 1L) { |
| System.out.println("using thread-local object allocation."); |
| } |
| |
| l = getFlagValue("UseConcMarkSweepGC", flagMap); |
| if (l == 1L) { |
| System.out.println("Concurrent Mark-Sweep GC"); |
| return; |
| } |
| |
| l = getFlagValue("UseParallelGC", flagMap); |
| if (l == 1L) { |
| System.out.print("Parallel GC "); |
| l = getFlagValue("ParallelGCThreads", flagMap); |
| System.out.println("with " + l + " thread(s)"); |
| return; |
| } |
| |
| l = getFlagValue("UseG1GC", flagMap); |
| if (l == 1L) { |
| System.out.print("Garbage-First (G1) GC "); |
| l = getFlagValue("ParallelGCThreads", flagMap); |
| System.out.println("with " + l + " thread(s)"); |
| return; |
| } |
| |
| System.out.println("Mark Sweep Compact GC"); |
| } |
| |
| private void printPSYoungGen(PSYoungGen youngGen) { |
| System.out.println("PS Young Generation"); |
| MutableSpace eden = youngGen.edenSpace(); |
| System.out.println("Eden Space:"); |
| printMutableSpace(eden); |
| MutableSpace from = youngGen.fromSpace(); |
| System.out.println("From Space:"); |
| printMutableSpace(from); |
| MutableSpace to = youngGen.toSpace(); |
| System.out.println("To Space:"); |
| printMutableSpace(to); |
| } |
| |
| private void printMutableSpace(MutableSpace space) { |
| printValMB("capacity = ", space.capacity()); |
| printValMB("used = ", space.used()); |
| long free = space.capacity() - space.used(); |
| printValMB("free = ", free); |
| System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used"); |
| } |
| |
| private static String alignment = " "; |
| |
| private void printGen(Generation gen) { |
| printValMB("capacity = ", gen.capacity()); |
| printValMB("used = ", gen.used()); |
| printValMB("free = ", gen.free()); |
| System.out.println(alignment + (double)gen.used() * 100.0 / gen.capacity() + "% used"); |
| } |
| |
| private void printSpace(ContiguousSpace space) { |
| printValMB("capacity = ", space.capacity()); |
| printValMB("used = ", space.used()); |
| printValMB("free = ", space.free()); |
| System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used"); |
| } |
| |
| private void printG1Space(String spaceName, long regionNum, |
| long used, long capacity) { |
| long free = capacity - used; |
| System.out.println(spaceName); |
| printValue("regions = ", regionNum); |
| printValMB("capacity = ", capacity); |
| printValMB("used = ", used); |
| printValMB("free = ", free); |
| double occPerc = (capacity > 0) ? (double) used * 100.0 / capacity : 0.0; |
| System.out.println(alignment + occPerc + "% used"); |
| } |
| |
| private static final double FACTOR = 1024*1024; |
| private void printValMB(String title, long value) { |
| if (value < 0) { |
| System.out.println(alignment + title + (value >>> 20) + " MB"); |
| } else { |
| double mb = value/FACTOR; |
| System.out.println(alignment + title + value + " (" + mb + "MB)"); |
| } |
| } |
| |
| private void printValue(String title, long value) { |
| System.out.println(alignment + title + value); |
| } |
| |
| private long getFlagValue(String name, Map flagMap) { |
| VM.Flag f = (VM.Flag) flagMap.get(name); |
| if (f != null) { |
| if (f.isBool()) { |
| return f.getBool()? 1L : 0L; |
| } else { |
| return Long.parseLong(f.getValue()); |
| } |
| } else { |
| return -1; |
| } |
| } |
| |
| private void printInternStringStatistics() { |
| class StringStat implements StringTable.StringVisitor { |
| private int count; |
| private long size; |
| private OopField stringValueField; |
| |
| StringStat() { |
| VM vm = VM.getVM(); |
| SystemDictionary sysDict = vm.getSystemDictionary(); |
| InstanceKlass strKlass = sysDict.getStringKlass(); |
| // String has a field named 'value' of type 'char[]'. |
| stringValueField = (OopField) strKlass.findField("value", "[C"); |
| } |
| |
| private long stringSize(Instance instance) { |
| // We include String content in size calculation. |
| return instance.getObjectSize() + |
| stringValueField.getValue(instance).getObjectSize(); |
| } |
| |
| public void visit(Instance str) { |
| count++; |
| size += stringSize(str); |
| } |
| |
| public void print() { |
| System.out.println(count + |
| " interned Strings occupying " + size + " bytes."); |
| } |
| } |
| |
| StringStat stat = new StringStat(); |
| StringTable strTable = VM.getVM().getStringTable(); |
| strTable.stringsDo(stat); |
| stat.print(); |
| } |
| } |