1 /*
   2  * Copyright (c) 2014, 2016, 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  * @test GetUsageTest
  26  * @summary testing of getUsage() for segmented code cache
  27  * @modules java.base/jdk.internal.misc
  28  *          java.management
  29  * @library /test/lib /
  30  *
  31  * @build sun.hotspot.WhiteBox
  32  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  33  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  35  *     -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  36  *     -XX:-UseCodeCacheFlushing -XX:-MethodFlushing
  37  *     -XX:+SegmentedCodeCache
  38  *     compiler.codecache.jmx.GetUsageTest
  39  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  40  *     -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  41  *     -XX:-UseCodeCacheFlushing -XX:-MethodFlushing
  42  *     -XX:-SegmentedCodeCache
  43  *     compiler.codecache.jmx.GetUsageTest
  44  */
  45 
  46 package compiler.codecache.jmx;
  47 
  48 import jdk.test.lib.Asserts;
  49 import sun.hotspot.code.BlobType;
  50 
  51 import java.lang.management.MemoryPoolMXBean;
  52 import java.util.HashMap;
  53 import java.util.Map;
  54 
  55 public class GetUsageTest {
  56 
  57     private final BlobType btype;
  58     private final int allocateSize;
  59 
  60     public GetUsageTest(BlobType btype, int allocSize) {
  61         this.btype = btype;
  62         this.allocateSize = allocSize;
  63     }
  64 
  65     public static void main(String[] args) throws Exception {
  66         for (BlobType btype : BlobType.getAvailable()) {
  67             for (int allocSize = 10; allocSize < 100000; allocSize *= 10) {
  68                 new GetUsageTest(btype, allocSize).runTest();
  69             }
  70         }
  71     }
  72 
  73     protected final Map<MemoryPoolMXBean, Long> getBeanUsages() {
  74         Map<MemoryPoolMXBean, Long> beanUsages = new HashMap<>();
  75         for (BlobType bt : BlobType.getAvailable()) {
  76             beanUsages.put(bt.getMemoryPool(),
  77                     bt.getMemoryPool().getUsage().getUsed());
  78         }
  79         return beanUsages;
  80     }
  81 
  82     protected void runTest() {
  83         MemoryPoolMXBean[] predictableBeans = BlobType.getAvailable().stream()
  84                 .filter(CodeCacheUtils::isCodeHeapPredictable)
  85                 .map(BlobType::getMemoryPool)
  86                 .toArray(MemoryPoolMXBean[]::new);
  87         Map<MemoryPoolMXBean, Long> initial = getBeanUsages();
  88         long addr = 0;
  89         try {
  90             addr = CodeCacheUtils.WB.allocateCodeBlob(allocateSize, btype.id);
  91             Map<MemoryPoolMXBean, Long> current = getBeanUsages();
  92             long blockCount = Math.floorDiv(allocateSize
  93                     + CodeCacheUtils.getHeaderSize(btype)
  94                     + CodeCacheUtils.SEGMENT_SIZE - 1, CodeCacheUtils.SEGMENT_SIZE);
  95             long usageUpperEstimate = Math.max(blockCount,
  96                     CodeCacheUtils.MIN_BLOCK_LENGTH) * CodeCacheUtils.SEGMENT_SIZE;
  97             for (MemoryPoolMXBean entry : predictableBeans) {
  98                 long diff = current.get(entry) - initial.get(entry);
  99                 if (entry.equals(btype.getMemoryPool())) {
 100                     if (CodeCacheUtils.isCodeHeapPredictable(btype)) {
 101                         Asserts.assertFalse(diff <= 0L || diff > usageUpperEstimate,
 102                                 String.format("Pool %s usage increase was reported "
 103                                         + "unexpectedly as increased by %d using "
 104                                         + "allocation size %d", entry.getName(),
 105                                         diff, allocateSize));
 106                     }
 107                 } else {
 108                     CodeCacheUtils.assertEQorGTE(btype, diff, 0L,
 109                             String.format("Pool %s usage changed unexpectedly while"
 110                                     + " trying to increase: %s using allocation "
 111                                     + "size %d", entry.getName(),
 112                                     btype.getMemoryPool().getName(), allocateSize));
 113                 }
 114             }
 115         } finally {
 116             if (addr != 0) {
 117                 CodeCacheUtils.WB.freeCodeBlob(addr);
 118             }
 119         }
 120         System.out.printf("INFO: Scenario finished successfully for %s%n",
 121                 btype.getMemoryPool().getName());
 122     }
 123 }