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 PeakUsageTest
  26  * @library /test/lib /
  27  * @requires vm.flavor != "minimal"
  28  * @modules java.base/jdk.internal.misc
  29  *          java.management
  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:+SegmentedCodeCache
  37  *     compiler.codecache.jmx.PeakUsageTest
  38  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  39  *     -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  40  *     -XX:-SegmentedCodeCache
  41  *     compiler.codecache.jmx.PeakUsageTest
  42  * @summary testing of getPeakUsage() and resetPeakUsage for
  43  *     segmented code cache
  44  */
  45 
  46 package compiler.codecache.jmx;
  47 
  48 import sun.hotspot.code.BlobType;
  49 
  50 import java.lang.management.MemoryPoolMXBean;
  51 
  52 
  53 public class PeakUsageTest {
  54 
  55     private final BlobType btype;
  56 
  57     public PeakUsageTest(BlobType btype) {
  58         this.btype = btype;
  59     }
  60 
  61     public static void main(String[] args) {
  62         for (BlobType btype : BlobType.getAvailable()) {
  63             new PeakUsageTest(btype).runTest();
  64         }
  65     }
  66 
  67     protected void runTest() {
  68         MemoryPoolMXBean bean = btype.getMemoryPool();
  69         bean.resetPeakUsage();
  70         long addr = CodeCacheUtils.WB.allocateCodeBlob(
  71                 CodeCacheUtils.ALLOCATION_SIZE, btype.id);
  72 
  73         try {
  74             /*
  75             Always save peakUsage after saving currentUsage. Reversing the order
  76             can lead to inconsistent results (currentUsage > peakUsage) because
  77             of intermediate allocations.
  78             */
  79             long currUsage = bean.getUsage().getUsed();
  80             long peakUsage = bean.getPeakUsage().getUsed();
  81             CodeCacheUtils.assertEQorLTE(btype, currUsage,
  82                     peakUsage,
  83                     "Peak usage does not match usage after allocation for "
  84                     + bean.getName());
  85         } finally {
  86             if (addr != 0) {
  87                 CodeCacheUtils.WB.freeCodeBlob(addr);
  88             }
  89         }
  90         bean.resetPeakUsage();
  91         long currUsage = bean.getUsage().getUsed();
  92         long peakUsage = bean.getPeakUsage().getUsed();
  93         CodeCacheUtils.assertEQorLTE(btype, currUsage,
  94                 peakUsage,
  95                 "Code cache peak usage is not equal to usage after reset for "
  96                 + bean.getName());
  97         long addr2 = CodeCacheUtils.WB.allocateCodeBlob(
  98                 CodeCacheUtils.ALLOCATION_SIZE, btype.id);
  99         try {
 100             currUsage = bean.getUsage().getUsed();
 101             peakUsage = bean.getPeakUsage().getUsed();
 102 
 103             CodeCacheUtils.assertEQorLTE(btype, currUsage,
 104                     peakUsage,
 105                     "Code cache peak usage is not equal to usage after fresh "
 106                     + "allocation for " + bean.getName());
 107         } finally {
 108             if (addr2 != 0) {
 109                 CodeCacheUtils.WB.freeCodeBlob(addr2);
 110             }
 111         }
 112         System.out.printf("INFO: Scenario finished successfully for %s%n",
 113                 bean.getName());
 114     }
 115 }