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 com.oracle.java.testlibrary.*; 29 import java.lang.Thread; 30 import java.util.ArrayList; 31 import java.util.Arrays; 32 33 class RunSystemGCs { 34 // 4M size, both are directly allocated into the old gen 35 static Object[] largeObject1 = new Object[1024 * 1024]; 36 static Object[] largeObject2 = new Object[1024 * 1024]; 37 38 static int[] temp; 39 40 public static void main(String[] args) { 41 // create some cross-references between these objects 42 for (int i = 0; i < largeObject1.length; i++) { 43 largeObject1[i] = largeObject2; 44 } 45 46 for (int i = 0; i < largeObject2.length; i++) { 47 largeObject2[i] = largeObject1; 48 } 49 50 int numGCs = Integer.parseInt(args[0]); 51 52 if (numGCs > 0) { 53 // try to force a minor collection: the young gen is 4M, the 54 // amount of data allocated below is roughly that (4*1024*1024 + 55 // some header data) 56 for (int i = 0; i < 1024 ; i++) { 57 temp = new int[1024]; 58 } 59 } 60 61 for (int i = 0; i < numGCs - 1; i++) { 62 System.gc(); 63 } 64 } 65 } 66 67 public class TestSummarizeRSetStatsTools { 68 69 public static String runTest(String[] additionalArgs, int numGCs) throws Exception { 70 ArrayList<String> finalargs = new ArrayList<String>(); 71 String[] defaultArgs = new String[] { 72 "-XX:+UseG1GC", 73 "-Xmn4m", 74 "-Xmx20m", 75 "-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking 76 "-XX:+PrintGC", 77 "-XX:+UnlockDiagnosticVMOptions", 78 "-XX:G1HeapRegionSize=1M", 79 }; 80 81 finalargs.addAll(Arrays.asList(defaultArgs)); 82 83 if (additionalArgs != null) { 84 finalargs.addAll(Arrays.asList(additionalArgs)); 85 } 86 87 finalargs.add(RunSystemGCs.class.getName()); 88 finalargs.add(String.valueOf(numGCs)); 89 90 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 91 finalargs.toArray(new String[0])); 92 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 93 94 output.shouldHaveExitValue(0); 95 96 String result = output.getStdout(); 97 return result; 98 } 99 100 private static void checkCounts(int expected, int actual, String which) throws Exception { 101 if (expected != actual) { 102 throw new Exception("RSet summaries mention " + which + " regions an incorrect number of times. Expected " + expected + ", got " + actual); 103 } 104 } 105 106 public static void expectPerRegionRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception { 107 expectRSetSummaries(result, expectedCumulative, expectedPeriodic); 108 int actualYoung = result.split("Young regions").length - 1; 109 int actualHumonguous = result.split("Humonguous regions").length - 1; 110 int actualFree = result.split("Free regions").length - 1; 111 int actualOther = result.split("Old regions").length - 1; 112 113 // the strings we check for above are printed twice per summary 114 int expectedPerRegionTypeInfo = (expectedCumulative + expectedPeriodic) * 2; 115 116 checkCounts(expectedPerRegionTypeInfo, actualYoung, "Young"); 117 checkCounts(expectedPerRegionTypeInfo, actualHumonguous, "Humonguous"); 118 checkCounts(expectedPerRegionTypeInfo, actualFree, "Free"); 119 checkCounts(expectedPerRegionTypeInfo, actualOther, "Old"); 120 } 121 122 public static void expectRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception { 123 int actualTotal = result.split("Concurrent RS processed").length - 1; 124 int actualCumulative = result.split("Cumulative RS summary").length - 1; 125 126 if (expectedCumulative != actualCumulative) { 127 throw new Exception("Incorrect amount of RSet summaries at the end. Expected " + expectedCumulative + ", got " + actualCumulative); 128 } 129 130 if (expectedPeriodic != (actualTotal - actualCumulative)) { 131 throw new Exception("Incorrect amount of per-period RSet summaries at the end. Expected " + expectedPeriodic + ", got " + (actualTotal - actualCumulative)); 132 } 133 } 134 } 135