1 /* 2 * Copyright Amazon.com Inc. 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 /* 26 * @test 27 * @summary Test that growth of old-gen triggers old-gen marking 28 * @requires vm.gc.Shenandoah 29 * @library /test/lib 30 * @run driver TestOldGrowthTriggers 31 */ 32 33 import java.util.*; 34 import java.math.BigInteger; 35 36 import jdk.test.lib.Asserts; 37 import jdk.test.lib.process.ProcessTools; 38 import jdk.test.lib.process.OutputAnalyzer; 39 40 public class TestOldGrowthTriggers { 41 42 public static void makeOldAllocations() { 43 // Expect most of the BigInteger entries placed into array to be promoted, and most will eventually become garbage within old 44 45 final int array_size = 512 * 1024; // 512K entries 46 BigInteger array[] = new BigInteger[array_size]; 47 Random r = new Random(46); 48 49 for (int i = 0; i < array_size; i++) { 50 array[i] = new BigInteger(128, r); 51 } 52 53 for (int refill_count = 0; refill_count < 192; refill_count++) { 54 // Each refill repopulates array_size randomly selected elements within array 55 for (int i = 0; i < array_size; i++) { 56 int replace_index = r.nextInt(array_size); 57 int derive_index = r.nextInt(array_size); 58 switch (i & 0x3) { 59 case 0: 60 // 50% chance of creating garbage 61 array[replace_index] = array[replace_index].max(array[derive_index]); 62 break; 63 case 1: 64 // 50% chance of creating garbage 65 array[replace_index] = array[replace_index].min(array[derive_index]); 66 break; 67 case 2: 68 // creates new old BigInteger, releases old BigInteger, 69 // may create ephemeral data while computing gcd 70 array[replace_index] = array[replace_index].gcd(array[derive_index]); 71 break; 72 case 3: 73 // creates new old BigInteger, releases old BigInteger 74 array[replace_index] = array[replace_index].multiply(array[derive_index]); 75 break; 76 } 77 if ((i & 0x3) == 0x3) { 78 } else { 79 } 80 } 81 } 82 } 83 84 public static void testOld(String... args) throws Exception { 85 String[] cmds = Arrays.copyOf(args, args.length + 2); 86 cmds[args.length] = TestOldGrowthTriggers.class.getName(); 87 cmds[args.length + 1] = "test"; 88 ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(cmds); 89 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 90 output.shouldHaveExitValue(0); 91 if (!output.getOutput().contains("Trigger (OLD): Old has overgrown")) { 92 throw new AssertionError("Generational mode: Should experience OLD triggers due to growth"); 93 } 94 } 95 96 public static void main(String[] args) throws Exception { 97 if (args.length > 0 && args[0].equals("test")) { 98 makeOldAllocations(); 99 return; 100 } 101 102 testOld("-Xlog:gc", 103 "-Xms256m", 104 "-Xmx256m", 105 "-XX:+UnlockDiagnosticVMOptions", 106 "-XX:+UnlockExperimentalVMOptions", 107 "-XX:+UseShenandoahGC", 108 "-XX:ShenandoahGCMode=generational", 109 "-XX:ShenandoahGuaranteedYoungGCInterval=0", 110 "-XX:ShenandoahGuaranteedOldGCInterval=0" 111 ); 112 } 113 }