1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * Common helpers for TestSummarizeRSetStats* tests
  26  */
  27 
  28 import sun.management.ManagementFactoryHelper;
  29 import com.sun.management.HotSpotDiagnosticMXBean;
  30 import com.sun.management.VMOption;
  31 
  32 import com.oracle.java.testlibrary.*;
  33 import java.util.regex.Matcher;
  34 import java.util.regex.Pattern;
  35 import java.lang.Thread;
  36 import java.util.ArrayList;
  37 import java.util.Arrays;
  38 
  39 class RunSystemGCs {
  40     // 4M size, both are directly allocated into the old gen
  41     static Object[] largeObject1 = new Object[1024 * 1024];
  42     static Object[] largeObject2 = new Object[1024 * 1024];
  43 
  44     static int[] temp;
  45 
  46     public static void main(String[] args) {
  47         // create some cross-references between these objects
  48         for (int i = 0; i < largeObject1.length; i++) {
  49             largeObject1[i] = largeObject2;
  50         }
  51 
  52         for (int i = 0; i < largeObject2.length; i++) {
  53             largeObject2[i] = largeObject1;
  54         }
  55 
  56         int numGCs = Integer.parseInt(args[0]);
  57 
  58         if (numGCs > 0) {
  59             // try to force a minor collection: the young gen is 4M, the
  60             // amount of data allocated below is roughly that (4*1024*1024 +
  61             // some header data)
  62             for (int i = 0; i < 1024 ; i++) {
  63                 temp = new int[1024];
  64             }
  65         }
  66 
  67         for (int i = 0; i < numGCs - 1; i++) {
  68             System.gc();
  69         }
  70     }
  71 }
  72 
  73 public class TestSummarizeRSetStatsTools {
  74 
  75     // the VM is currently run using G1GC, i.e. trying to test G1 functionality.
  76     public static boolean testingG1GC() {
  77         HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
  78 
  79         VMOption option = diagnostic.getVMOption("UseG1GC");
  80         if (option.getValue().equals("false")) {
  81           System.out.println("Skipping this test. It is only a G1 test.");
  82           return false;
  83         }
  84         return true;
  85     }
  86 
  87     public static String runTest(String[] additionalArgs, int numGCs) throws Exception {
  88         ArrayList<String> finalargs = new ArrayList<String>();
  89         String[] defaultArgs = new String[] {
  90             "-XX:+UseG1GC",
  91             "-Xmn4m",
  92             "-Xmx20m",
  93             "-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking
  94             "-XX:+PrintGC",
  95             "-XX:+UnlockDiagnosticVMOptions",
  96             "-XX:G1HeapRegionSize=1M",
  97         };
  98 
  99         finalargs.addAll(Arrays.asList(defaultArgs));
 100 
 101         if (additionalArgs != null) {
 102             finalargs.addAll(Arrays.asList(additionalArgs));
 103         }
 104 
 105         finalargs.add(RunSystemGCs.class.getName());
 106         finalargs.add(String.valueOf(numGCs));
 107 
 108         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
 109             finalargs.toArray(new String[0]));
 110         OutputAnalyzer output = new OutputAnalyzer(pb.start());
 111 
 112         output.shouldHaveExitValue(0);
 113 
 114         String result = output.getStdout();
 115         return result;
 116     }
 117 
 118     private static void checkCounts(int expected, int actual, String which) throws Exception {
 119         if (expected != actual) {
 120             throw new Exception("RSet summaries mention " + which + " regions an incorrect number of times. Expected " + expected + ", got " + actual);
 121         }
 122     }
 123 
 124     public static void expectPerRegionRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
 125         expectRSetSummaries(result, expectedCumulative, expectedPeriodic);
 126         int actualYoung = result.split("Young regions").length - 1;
 127         int actualHumonguous = result.split("Humonguous regions").length - 1;
 128         int actualFree = result.split("Free regions").length - 1;
 129         int actualOther = result.split("Old regions").length - 1;
 130 
 131         // the strings we check for above are printed four times per summary
 132         int expectedPerRegionTypeInfo = (expectedCumulative + expectedPeriodic) * 4;
 133 
 134         checkCounts(expectedPerRegionTypeInfo, actualYoung, "Young");
 135         checkCounts(expectedPerRegionTypeInfo, actualHumonguous, "Humonguous");
 136         checkCounts(expectedPerRegionTypeInfo, actualFree, "Free");
 137         checkCounts(expectedPerRegionTypeInfo, actualOther, "Old");
 138     }
 139 
 140     public static void expectRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
 141         int actualTotal = result.split("concurrent refinement").length - 1;
 142         int actualCumulative = result.split("Cumulative RS summary").length - 1;
 143 
 144         if (expectedCumulative != actualCumulative) {
 145             throw new Exception("Incorrect amount of RSet summaries at the end. Expected " + expectedCumulative + ", got " + actualCumulative);
 146         }
 147 
 148         if (expectedPeriodic != (actualTotal - actualCumulative)) {
 149             throw new Exception("Incorrect amount of per-period RSet summaries at the end. Expected " + expectedPeriodic + ", got " + (actualTotal - actualCumulative));
 150         }
 151     }
 152 }
 153