author | tonyp |
Mon, 03 Oct 2011 19:04:14 -0400 | |
changeset 10675 | 8b887b2cb116 |
parent 10663 | 3ef855a3329b |
child 10985 | f529e2356036 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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package sun.jvm.hotspot.tools; |
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import java.util.*; |
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import sun.jvm.hotspot.gc_interface.*; |
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import sun.jvm.hotspot.gc_implementation.g1.*; |
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import sun.jvm.hotspot.gc_implementation.parallelScavenge.*; |
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import sun.jvm.hotspot.gc_implementation.shared.*; |
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import sun.jvm.hotspot.memory.*; |
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import sun.jvm.hotspot.runtime.*; |
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public class HeapSummary extends Tool { |
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public static void main(String[] args) { |
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HeapSummary hs = new HeapSummary(); |
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hs.start(args); |
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hs.stop(); |
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} |
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public void run() { |
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CollectedHeap heap = VM.getVM().getUniverse().heap(); |
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VM.Flag[] flags = VM.getVM().getCommandLineFlags(); |
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Map flagMap = new HashMap(); |
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if (flags == null) { |
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System.out.println("WARNING: command line flags are not available"); |
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} else { |
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for (int f = 0; f < flags.length; f++) { |
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flagMap.put(flags[f].getName(), flags[f]); |
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} |
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} |
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System.out.println(); |
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printGCAlgorithm(flagMap); |
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System.out.println(); |
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System.out.println("Heap Configuration:"); |
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printValue("MinHeapFreeRatio = ", getFlagValue("MinHeapFreeRatio", flagMap)); |
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printValue("MaxHeapFreeRatio = ", getFlagValue("MaxHeapFreeRatio", flagMap)); |
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printValMB("MaxHeapSize = ", getFlagValue("MaxHeapSize", flagMap)); |
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printValMB("NewSize = ", getFlagValue("NewSize", flagMap)); |
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printValMB("MaxNewSize = ", getFlagValue("MaxNewSize", flagMap)); |
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printValMB("OldSize = ", getFlagValue("OldSize", flagMap)); |
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printValue("NewRatio = ", getFlagValue("NewRatio", flagMap)); |
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printValue("SurvivorRatio = ", getFlagValue("SurvivorRatio", flagMap)); |
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printValMB("PermSize = ", getFlagValue("PermSize", flagMap)); |
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printValMB("MaxPermSize = ", getFlagValue("MaxPermSize", flagMap)); |
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System.out.println(); |
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System.out.println("Heap Usage:"); |
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if (heap instanceof SharedHeap) { |
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SharedHeap sharedHeap = (SharedHeap) heap; |
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if (sharedHeap instanceof GenCollectedHeap) { |
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GenCollectedHeap genHeap = (GenCollectedHeap) sharedHeap; |
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for (int n = 0; n < genHeap.nGens(); n++) { |
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Generation gen = genHeap.getGen(n); |
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if (gen instanceof sun.jvm.hotspot.memory.DefNewGeneration) { |
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System.out.println("New Generation (Eden + 1 Survivor Space):"); |
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printGen(gen); |
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ContiguousSpace eden = ((DefNewGeneration)gen).eden(); |
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System.out.println("Eden Space:"); |
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printSpace(eden); |
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ContiguousSpace from = ((DefNewGeneration)gen).from(); |
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System.out.println("From Space:"); |
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printSpace(from); |
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ContiguousSpace to = ((DefNewGeneration)gen).to(); |
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System.out.println("To Space:"); |
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printSpace(to); |
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} else { |
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System.out.println(gen.name() + ":"); |
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printGen(gen); |
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} |
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} |
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} else if (sharedHeap instanceof G1CollectedHeap) { |
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G1CollectedHeap g1h = (G1CollectedHeap) sharedHeap; |
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G1MonitoringSupport g1mm = g1h.g1mm(); |
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System.out.println("G1 Young Generation"); |
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printG1Space("Eden Space:", g1mm.edenUsed(), g1mm.edenCommitted()); |
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printG1Space("From Space:", g1mm.survivorUsed(), g1mm.survivorCommitted()); |
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printG1Space("To Space:", 0, 0); |
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printG1Space("G1 Old Generation", g1mm.oldUsed(), g1mm.oldCommitted()); |
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} else { |
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throw new RuntimeException("unknown SharedHeap type : " + heap.getClass()); |
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} |
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// Perm generation shared by the above |
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Generation permGen = sharedHeap.permGen(); |
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System.out.println("Perm Generation:"); |
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printGen(permGen); |
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} else if (heap instanceof ParallelScavengeHeap) { |
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ParallelScavengeHeap psh = (ParallelScavengeHeap) heap; |
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PSYoungGen youngGen = psh.youngGen(); |
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printPSYoungGen(youngGen); |
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PSOldGen oldGen = psh.oldGen(); |
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long oldFree = oldGen.capacity() - oldGen.used(); |
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System.out.println("PS Old Generation"); |
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printValMB("capacity = ", oldGen.capacity()); |
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printValMB("used = ", oldGen.used()); |
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printValMB("free = ", oldFree); |
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System.out.println(alignment + (double)oldGen.used() * 100.0 / oldGen.capacity() + "% used"); |
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PSPermGen permGen = psh.permGen(); |
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long permFree = permGen.capacity() - permGen.used(); |
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System.out.println("PS Perm Generation"); |
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printValMB("capacity = ", permGen.capacity()); |
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printValMB("used = ", permGen.used()); |
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printValMB("free = ", permFree); |
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System.out.println(alignment + (double)permGen.used() * 100.0 / permGen.capacity() + "% used"); |
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} else { |
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throw new RuntimeException("unknown CollectedHeap type : " + heap.getClass()); |
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} |
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} |
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// Helper methods |
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private void printGCAlgorithm(Map flagMap) { |
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// print about new generation |
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long l = getFlagValue("UseParNewGC", flagMap); |
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if (l == 1L) { |
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System.out.println("using parallel threads in the new generation."); |
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} |
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l = getFlagValue("UseTLAB", flagMap); |
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if (l == 1L) { |
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System.out.println("using thread-local object allocation."); |
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} |
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l = getFlagValue("UseConcMarkSweepGC", flagMap); |
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if (l == 1L) { |
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System.out.println("Concurrent Mark-Sweep GC"); |
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return; |
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} |
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l = getFlagValue("UseParallelGC", flagMap); |
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if (l == 1L) { |
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System.out.print("Parallel GC "); |
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l = getFlagValue("ParallelGCThreads", flagMap); |
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System.out.println("with " + l + " thread(s)"); |
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return; |
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} |
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l = getFlagValue("UseG1GC", flagMap); |
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if (l == 1L) { |
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System.out.print("Garbage-First (G1) GC "); |
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l = getFlagValue("ParallelGCThreads", flagMap); |
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System.out.println("with " + l + " thread(s)"); |
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return; |
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} |
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System.out.println("Mark Sweep Compact GC"); |
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} |
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private void printPSYoungGen(PSYoungGen youngGen) { |
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System.out.println("PS Young Generation"); |
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MutableSpace eden = youngGen.edenSpace(); |
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System.out.println("Eden Space:"); |
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printMutableSpace(eden); |
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MutableSpace from = youngGen.fromSpace(); |
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System.out.println("From Space:"); |
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printMutableSpace(from); |
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MutableSpace to = youngGen.toSpace(); |
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System.out.println("To Space:"); |
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printMutableSpace(to); |
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} |
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private void printMutableSpace(MutableSpace space) { |
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printValMB("capacity = ", space.capacity()); |
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printValMB("used = ", space.used()); |
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long free = space.capacity() - space.used(); |
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printValMB("free = ", free); |
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System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used"); |
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} |
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private static String alignment = " "; |
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private void printGen(Generation gen) { |
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printValMB("capacity = ", gen.capacity()); |
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printValMB("used = ", gen.used()); |
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printValMB("free = ", gen.free()); |
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System.out.println(alignment + (double)gen.used() * 100.0 / gen.capacity() + "% used"); |
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} |
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private void printSpace(ContiguousSpace space) { |
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printValMB("capacity = ", space.capacity()); |
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printValMB("used = ", space.used()); |
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printValMB("free = ", space.free()); |
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System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used"); |
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} |
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private void printG1Space(String spaceName, long used, long capacity) { |
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long free = capacity - used; |
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System.out.println(spaceName); |
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printValMB("capacity = ", capacity); |
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printValMB("used = ", used); |
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printValMB("free = ", free); |
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double occPerc = (capacity > 0) ? (double) used * 100.0 / capacity : 0.0; |
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System.out.println(alignment + occPerc + "% used"); |
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} |
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private static final double FACTOR = 1024*1024; |
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private void printValMB(String title, long value) { |
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if (value < 0) { |
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System.out.println(alignment + title + (value >>> 20) + " MB"); |
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} else { |
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double mb = value/FACTOR; |
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System.out.println(alignment + title + value + " (" + mb + "MB)"); |
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} |
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} |
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private void printValue(String title, long value) { |
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System.out.println(alignment + title + value); |
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} |
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private long getFlagValue(String name, Map flagMap) { |
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VM.Flag f = (VM.Flag) flagMap.get(name); |
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if (f != null) { |
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if (f.isBool()) { |
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return f.getBool()? 1L : 0L; |
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} else { |
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return Long.parseLong(f.getValue()); |
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} |
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} else { |
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return -1; |
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} |
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} |
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} |