1 /* 2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2020 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 import java.util.Set; 27 28 public class MetaspaceTestWithThreads { 29 30 // The context to use. 31 final MetaspaceTestContext context; 32 33 // Total *word* size we allow for the test to allocation. The test may overshoot this a bit, but should not by much. 34 final long testAllocationCeiling; 35 36 // Number of parallel allocators 37 final int numThreads; 38 39 // Number of seconds for each test 40 final int seconds; 41 42 RandomAllocatorThread threads[]; 43 44 public MetaspaceTestWithThreads(MetaspaceTestContext context, long testAllocationCeiling, int numThreads, int seconds) { 45 this.context = context; 46 this.testAllocationCeiling = testAllocationCeiling; 47 this.numThreads = numThreads; 48 this.seconds = seconds; 49 this.threads = new RandomAllocatorThread[numThreads]; 50 } 51 52 protected void stopAllThreads() throws InterruptedException { 53 // Stop all threads. 54 for (Thread t: threads) { 55 t.interrupt(); 56 t.join(); 57 } 58 } 59 60 void destroyArenasAndPurgeSpace() { 61 62 for (RandomAllocatorThread t: threads) { 63 if (t.allocator.arena.isLive()) { 64 context.destroyArena(t.allocator.arena); 65 } 66 } 67 68 context.checkStatistics(); 69 70 // After deleting all arenas, we should have no committed space left: all arena chunks have been returned to 71 // the freelist amd should have been maximally merged to a bunch of root chunks, which should be uncommitted 72 // in one go. 73 // Exception: if reclamation policy is none. 74 if (Settings.settings().doesReclaim()) { 75 if (context.committedWords() > 0) { 76 throw new RuntimeException("Expected no committed words after purging empty metaspace context (was: " + context.committedWords() + ")"); 77 } 78 } 79 80 context.purge(); 81 82 context.checkStatistics(); 83 84 // After purging - if all arenas had been deleted before - we should have no committed space left even in 85 // recmalation=none mode: 86 // purging deletes all nodes with only free chunks, and in this case no node should still house in-use chunks, 87 // so all nodes would have been unmapped. 88 // This is independent on reclamation policy. Only one exception: if the area was created with a reserve limit 89 // (mimicking compressed class space), the underlying virtual space list cannot be purged. 90 if (context.reserveLimit == 0) { 91 if (context.committedWords() > 0) { 92 throw new RuntimeException("Expected no committed words after purging empty metaspace context (was: " + context.committedWords() + ")"); 93 } 94 } 95 96 } 97 98 @Override 99 public String toString() { 100 return "commitLimit=" + context.commitLimit + 101 ", reserveLimit=" + context.reserveLimit + 102 ", testAllocationCeiling=" + testAllocationCeiling + 103 ", num_allocators=" + numThreads + 104 ", seconds=" + seconds; 105 } 106 107 108 }