Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/tools/HeapSummary.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 0b3d1ec6eaee |
| children | 9a094d29af19 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.tools; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.gc_interface.*; | |
| 3972 | 29 import sun.jvm.hotspot.gc_implementation.g1.*; |
| 0 | 30 import sun.jvm.hotspot.gc_implementation.parallelScavenge.*; |
| 31 import sun.jvm.hotspot.gc_implementation.shared.*; | |
| 32 import sun.jvm.hotspot.memory.*; | |
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33 import sun.jvm.hotspot.oops.*; |
| 0 | 34 import sun.jvm.hotspot.runtime.*; |
| 35 | |
| 36 public class HeapSummary extends Tool { | |
| 37 | |
| 38 public static void main(String[] args) { | |
| 39 HeapSummary hs = new HeapSummary(); | |
| 40 hs.start(args); | |
| 41 hs.stop(); | |
| 42 } | |
| 43 | |
| 44 public void run() { | |
| 45 CollectedHeap heap = VM.getVM().getUniverse().heap(); | |
| 46 VM.Flag[] flags = VM.getVM().getCommandLineFlags(); | |
| 47 Map flagMap = new HashMap(); | |
| 48 if (flags == null) { | |
| 49 System.out.println("WARNING: command line flags are not available"); | |
| 50 } else { | |
| 51 for (int f = 0; f < flags.length; f++) { | |
| 52 flagMap.put(flags[f].getName(), flags[f]); | |
| 53 } | |
| 54 } | |
| 55 | |
| 56 System.out.println(); | |
| 57 printGCAlgorithm(flagMap); | |
| 58 System.out.println(); | |
| 59 System.out.println("Heap Configuration:"); | |
| 60 printValue("MinHeapFreeRatio = ", getFlagValue("MinHeapFreeRatio", flagMap)); | |
| 61 printValue("MaxHeapFreeRatio = ", getFlagValue("MaxHeapFreeRatio", flagMap)); | |
| 62 printValMB("MaxHeapSize = ", getFlagValue("MaxHeapSize", flagMap)); | |
| 63 printValMB("NewSize = ", getFlagValue("NewSize", flagMap)); | |
| 64 printValMB("MaxNewSize = ", getFlagValue("MaxNewSize", flagMap)); | |
| 65 printValMB("OldSize = ", getFlagValue("OldSize", flagMap)); | |
| 66 printValue("NewRatio = ", getFlagValue("NewRatio", flagMap)); | |
| 67 printValue("SurvivorRatio = ", getFlagValue("SurvivorRatio", flagMap)); | |
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68 printValMB("MetaspaceSize = ", getFlagValue("MetaspaceSize", flagMap)); |
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69 printValMB("MaxMetaspaceSize = ", getFlagValue("MaxMetaspaceSize", flagMap)); |
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70 printValMB("G1HeapRegionSize = ", HeapRegion.grainBytes()); |
| 0 | 71 |
| 72 System.out.println(); | |
| 73 System.out.println("Heap Usage:"); | |
| 74 | |
| 3972 | 75 if (heap instanceof SharedHeap) { |
| 76 SharedHeap sharedHeap = (SharedHeap) heap; | |
| 77 if (sharedHeap instanceof GenCollectedHeap) { | |
| 78 GenCollectedHeap genHeap = (GenCollectedHeap) sharedHeap; | |
| 79 for (int n = 0; n < genHeap.nGens(); n++) { | |
| 80 Generation gen = genHeap.getGen(n); | |
| 81 if (gen instanceof sun.jvm.hotspot.memory.DefNewGeneration) { | |
| 82 System.out.println("New Generation (Eden + 1 Survivor Space):"); | |
| 83 printGen(gen); | |
| 0 | 84 |
| 3972 | 85 ContiguousSpace eden = ((DefNewGeneration)gen).eden(); |
| 86 System.out.println("Eden Space:"); | |
| 87 printSpace(eden); | |
| 88 | |
| 89 ContiguousSpace from = ((DefNewGeneration)gen).from(); | |
| 90 System.out.println("From Space:"); | |
| 91 printSpace(from); | |
| 0 | 92 |
| 3972 | 93 ContiguousSpace to = ((DefNewGeneration)gen).to(); |
| 94 System.out.println("To Space:"); | |
| 95 printSpace(to); | |
| 96 } else { | |
| 97 System.out.println(gen.name() + ":"); | |
| 98 printGen(gen); | |
| 99 } | |
| 100 } | |
| 101 } else if (sharedHeap instanceof G1CollectedHeap) { | |
| 102 G1CollectedHeap g1h = (G1CollectedHeap) sharedHeap; | |
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103 G1MonitoringSupport g1mm = g1h.g1mm(); |
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104 long edenRegionNum = g1mm.edenRegionNum(); |
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105 long survivorRegionNum = g1mm.survivorRegionNum(); |
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106 HeapRegionSetBase oldSet = g1h.oldSet(); |
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107 HeapRegionSetBase humongousSet = g1h.humongousSet(); |
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108 long oldRegionNum = oldSet.regionNum() + humongousSet.regionNum(); |
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109 printG1Space("G1 Heap:", g1h.n_regions(), |
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110 g1h.used(), g1h.capacity()); |
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111 System.out.println("G1 Young Generation:"); |
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112 printG1Space("Eden Space:", edenRegionNum, |
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113 g1mm.edenUsed(), g1mm.edenCommitted()); |
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114 printG1Space("Survivor Space:", survivorRegionNum, |
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115 g1mm.survivorUsed(), g1mm.survivorCommitted()); |
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116 printG1Space("G1 Old Generation:", oldRegionNum, |
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117 g1mm.oldUsed(), g1mm.oldCommitted()); |
| 3972 | 118 } else { |
| 119 throw new RuntimeException("unknown SharedHeap type : " + heap.getClass()); | |
| 0 | 120 } |
| 121 } else if (heap instanceof ParallelScavengeHeap) { | |
| 122 ParallelScavengeHeap psh = (ParallelScavengeHeap) heap; | |
| 123 PSYoungGen youngGen = psh.youngGen(); | |
| 124 printPSYoungGen(youngGen); | |
| 125 | |
| 126 PSOldGen oldGen = psh.oldGen(); | |
| 127 long oldFree = oldGen.capacity() - oldGen.used(); | |
| 128 System.out.println("PS Old Generation"); | |
| 129 printValMB("capacity = ", oldGen.capacity()); | |
| 130 printValMB("used = ", oldGen.used()); | |
| 131 printValMB("free = ", oldFree); | |
| 132 System.out.println(alignment + (double)oldGen.used() * 100.0 / oldGen.capacity() + "% used"); | |
| 133 } else { | |
| 3972 | 134 throw new RuntimeException("unknown CollectedHeap type : " + heap.getClass()); |
| 0 | 135 } |
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136 |
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137 System.out.println(); |
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138 printInternStringStatistics(); |
| 0 | 139 } |
| 140 | |
| 141 // Helper methods | |
| 142 | |
| 143 private void printGCAlgorithm(Map flagMap) { | |
| 144 // print about new generation | |
| 145 long l = getFlagValue("UseParNewGC", flagMap); | |
| 146 if (l == 1L) { | |
| 147 System.out.println("using parallel threads in the new generation."); | |
| 148 } | |
| 149 | |
| 150 l = getFlagValue("UseTLAB", flagMap); | |
| 151 if (l == 1L) { | |
| 152 System.out.println("using thread-local object allocation."); | |
| 153 } | |
| 154 | |
| 155 l = getFlagValue("UseConcMarkSweepGC", flagMap); | |
| 156 if (l == 1L) { | |
| 157 System.out.println("Concurrent Mark-Sweep GC"); | |
| 158 return; | |
| 159 } | |
| 160 | |
| 161 l = getFlagValue("UseParallelGC", flagMap); | |
| 162 if (l == 1L) { | |
| 163 System.out.print("Parallel GC "); | |
| 164 l = getFlagValue("ParallelGCThreads", flagMap); | |
| 165 System.out.println("with " + l + " thread(s)"); | |
| 166 return; | |
| 167 } | |
| 168 | |
| 3972 | 169 l = getFlagValue("UseG1GC", flagMap); |
| 170 if (l == 1L) { | |
| 171 System.out.print("Garbage-First (G1) GC "); | |
| 172 l = getFlagValue("ParallelGCThreads", flagMap); | |
| 173 System.out.println("with " + l + " thread(s)"); | |
| 174 return; | |
| 175 } | |
| 176 | |
| 0 | 177 System.out.println("Mark Sweep Compact GC"); |
| 178 } | |
| 179 | |
| 180 private void printPSYoungGen(PSYoungGen youngGen) { | |
| 181 System.out.println("PS Young Generation"); | |
| 182 MutableSpace eden = youngGen.edenSpace(); | |
| 183 System.out.println("Eden Space:"); | |
| 184 printMutableSpace(eden); | |
| 185 MutableSpace from = youngGen.fromSpace(); | |
| 186 System.out.println("From Space:"); | |
| 187 printMutableSpace(from); | |
| 188 MutableSpace to = youngGen.toSpace(); | |
| 189 System.out.println("To Space:"); | |
| 190 printMutableSpace(to); | |
| 191 } | |
| 192 | |
| 193 private void printMutableSpace(MutableSpace space) { | |
| 194 printValMB("capacity = ", space.capacity()); | |
| 195 printValMB("used = ", space.used()); | |
| 196 long free = space.capacity() - space.used(); | |
| 197 printValMB("free = ", free); | |
| 198 System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used"); | |
| 199 } | |
| 200 | |
| 201 private static String alignment = " "; | |
| 202 | |
| 203 private void printGen(Generation gen) { | |
| 204 printValMB("capacity = ", gen.capacity()); | |
| 205 printValMB("used = ", gen.used()); | |
| 206 printValMB("free = ", gen.free()); | |
| 207 System.out.println(alignment + (double)gen.used() * 100.0 / gen.capacity() + "% used"); | |
| 208 } | |
| 209 | |
| 210 private void printSpace(ContiguousSpace space) { | |
| 211 printValMB("capacity = ", space.capacity()); | |
| 212 printValMB("used = ", space.used()); | |
| 213 printValMB("free = ", space.free()); | |
| 214 System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used"); | |
| 215 } | |
| 216 | |
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217 private void printG1Space(String spaceName, long regionNum, |
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218 long used, long capacity) { |
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219 long free = capacity - used; |
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220 System.out.println(spaceName); |
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221 printValue("regions = ", regionNum); |
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222 printValMB("capacity = ", capacity); |
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223 printValMB("used = ", used); |
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224 printValMB("free = ", free); |
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225 double occPerc = (capacity > 0) ? (double) used * 100.0 / capacity : 0.0; |
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226 System.out.println(alignment + occPerc + "% used"); |
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227 } |
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228 |
| 0 | 229 private static final double FACTOR = 1024*1024; |
| 230 private void printValMB(String title, long value) { | |
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231 if (value < 0) { |
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232 System.out.println(alignment + title + (value >>> 20) + " MB"); |
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233 } else { |
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234 double mb = value/FACTOR; |
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235 System.out.println(alignment + title + value + " (" + mb + "MB)"); |
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236 } |
| 0 | 237 } |
| 238 | |
| 239 private void printValue(String title, long value) { | |
| 240 System.out.println(alignment + title + value); | |
| 241 } | |
| 242 | |
| 243 private long getFlagValue(String name, Map flagMap) { | |
| 244 VM.Flag f = (VM.Flag) flagMap.get(name); | |
| 245 if (f != null) { | |
| 246 if (f.isBool()) { | |
| 247 return f.getBool()? 1L : 0L; | |
| 248 } else { | |
| 249 return Long.parseLong(f.getValue()); | |
| 250 } | |
| 251 } else { | |
| 252 return -1; | |
| 253 } | |
| 254 } | |
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255 |
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256 private void printInternStringStatistics() { |
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257 class StringStat implements StringTable.StringVisitor { |
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258 private int count; |
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259 private long size; |
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260 private OopField stringValueField; |
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261 |
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262 StringStat() { |
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263 VM vm = VM.getVM(); |
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264 SystemDictionary sysDict = vm.getSystemDictionary(); |
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265 InstanceKlass strKlass = sysDict.getStringKlass(); |
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266 // String has a field named 'value' of type 'char[]'. |
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267 stringValueField = (OopField) strKlass.findField("value", "[C"); |
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268 } |
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269 |
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270 private long stringSize(Instance instance) { |
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271 // We include String content in size calculation. |
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272 return instance.getObjectSize() + |
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273 stringValueField.getValue(instance).getObjectSize(); |
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274 } |
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275 |
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276 public void visit(Instance str) { |
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277 count++; |
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278 size += stringSize(str); |
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279 } |
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280 |
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281 public void print() { |
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282 System.out.println(count + |
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283 " interned Strings occupying " + size + " bytes."); |
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284 } |
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285 } |
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286 |
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287 StringStat stat = new StringStat(); |
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288 StringTable strTable = VM.getVM().getStringTable(); |
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289 strTable.stringsDo(stat); |
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290 stat.print(); |
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291 } |
| 0 | 292 } |