Mercurial > hg > truffle
annotate agent/test/jdi/serialvm.java @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2003, 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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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 import com.sun.jdi.*; | |
| 26 import com.sun.jdi.connect.*; | |
| 27 | |
| 28 import java.util.Map; | |
| 29 import java.util.List; | |
| 30 import java.util.Iterator; | |
| 31 import java.io.IOException; | |
| 32 | |
| 33 | |
| 34 /* This class is used to test multi VM connectivity feature of | |
| 35 * SA/JDI. Accepts two PIDs as arguments. Connects to first VM | |
| 36 *, disposes it, connects to second VM, disposes second VM. | |
| 37 */ | |
| 38 | |
| 39 | |
| 40 public class serialvm { | |
| 41 static AttachingConnector myPIDConn; | |
| 42 static VirtualMachine vm1; | |
| 43 static VirtualMachine vm2; | |
| 44 static VirtualMachineManager vmmgr; | |
| 45 | |
| 46 public static void println(String msg) { | |
| 47 System.out.println(msg); | |
| 48 } | |
| 49 | |
| 50 private static void usage() { | |
| 51 System.err.println("Usage: java serialvm <pid1> <pid2>"); | |
| 52 System.exit(1); | |
| 53 } | |
| 54 | |
| 55 public static void main(String args[]) { | |
| 56 vmmgr = Bootstrap.virtualMachineManager(); | |
| 57 List attachingConnectors = vmmgr.attachingConnectors(); | |
| 58 if (attachingConnectors.isEmpty()) { | |
| 59 System.err.println( "ERROR: No attaching connectors"); | |
| 60 return; | |
| 61 } | |
| 62 Iterator myIt = attachingConnectors.iterator(); | |
| 63 while (myIt.hasNext()) { | |
| 64 AttachingConnector tmpCon = (AttachingConnector)myIt.next(); | |
| 65 if (tmpCon.name().equals( | |
| 66 "sun.jvm.hotspot.jdi.SAPIDAttachingConnector")) { | |
| 67 myPIDConn = tmpCon; | |
| 68 break; | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 int pid1 = 0, pid2 = 0; | |
| 73 String pidText = null; | |
| 74 switch (args.length) { | |
| 75 case (2): | |
| 76 try { | |
| 77 pidText = args[0]; | |
| 78 pid1 = Integer.parseInt(pidText); | |
| 79 System.out.println( "pid1: " + pid1); | |
| 80 pidText = args[1]; | |
| 81 pid2 = Integer.parseInt(pidText); | |
| 82 System.out.println( "pid2: " + pid2); | |
| 83 } catch (NumberFormatException e) { | |
| 84 println(e.getMessage()); | |
| 85 usage(); | |
| 86 } | |
| 87 break; | |
| 88 default: | |
| 89 usage(); | |
| 90 } | |
| 91 | |
| 92 // attach, dispose, attach2, dispose2 pattern | |
| 93 // as opposed to attach1, attach2, dispose1, dispose2 | |
| 94 vm1 = attachPID(pid1); | |
| 95 if (vm1 != null) { | |
| 96 System.out.println("vm1: attached ok!"); | |
| 97 System.out.println(vm1.version()); | |
| 98 sagdoit mine = new sagdoit(vm1); | |
| 99 mine.doAll(); | |
| 100 } | |
| 101 if (vm1 != null) { | |
| 102 vm1.dispose(); | |
| 103 } | |
| 104 | |
| 105 vm2 = attachPID(pid2); | |
| 106 if (vm2 != null) { | |
| 107 System.out.println("vm2: attached ok!"); | |
| 108 System.out.println(vm2.version()); | |
| 109 sagdoit mine = new sagdoit(vm2); | |
| 110 mine.doAll(); | |
| 111 } | |
| 112 | |
| 113 | |
| 114 if (vm2 != null) { | |
| 115 vm2.dispose(); | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 private static VirtualMachine attachPID(int pid) { | |
| 120 Map connArgs = myPIDConn.defaultArguments(); | |
| 121 System.out.println("connArgs = " + connArgs); | |
| 122 VirtualMachine vm; | |
| 123 Connector.StringArgument connArg = (Connector.StringArgument)connArgs.get("pid"); | |
| 124 connArg.setValue(Integer.toString(pid)); | |
| 125 | |
| 126 try { | |
| 127 vm = myPIDConn.attach(connArgs); | |
| 128 } catch (IOException ee) { | |
| 129 System.err.println("ERROR: myPIDConn.attach got IO Exception:" + ee); | |
| 130 vm = null; | |
| 131 } catch (IllegalConnectorArgumentsException ee) { | |
| 132 System.err.println("ERROR: myPIDConn.attach got illegal args exception:" + ee); | |
| 133 vm = null; | |
| 134 } | |
| 135 return vm; | |
| 136 } | |
| 137 } |