1 /*
   2  * Copyright (c) 2014, 2015, 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 import jdk.test.lib.Asserts;
  25 import java.lang.management.MemoryPoolMXBean;
  26 import sun.hotspot.code.BlobType;
  27 
  28 /*
  29  * @test UsageThresholdIncreasedTest
  30  * @library /testlibrary /../../test/lib
  31  * @modules java.base/sun.misc
  32  *          java.management
  33  * @build UsageThresholdIncreasedTest
  34  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  35  *     sun.hotspot.WhiteBox$WhiteBoxPermission
  36  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  37  *     -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache -XX:-UseCodeCacheFlushing
  38  *     -XX:-MethodFlushing -XX:CompileCommand=compileonly,null::*
  39  *     UsageThresholdIncreasedTest
  40  * @summary verifying that threshold hasn't been hit after allocation smaller
  41  *     than threshold value and that threshold value can be changed
  42  */
  43 public class UsageThresholdIncreasedTest {
  44 
  45     private static final int ALLOCATION_STEP = 5;
  46     private static final long THRESHOLD_STEP = ALLOCATION_STEP
  47             * CodeCacheUtils.MIN_ALLOCATION;
  48     private final BlobType btype;
  49 
  50     public UsageThresholdIncreasedTest(BlobType btype) {
  51         this.btype = btype;
  52     }
  53 
  54     public static void main(String[] args) {
  55         for (BlobType btype : BlobType.getAvailable()) {
  56             if (CodeCacheUtils.isCodeHeapPredictable(btype)) {
  57                 new UsageThresholdIncreasedTest(btype).runTest();
  58             }
  59         }
  60     }
  61 
  62     private void checkUsageThresholdCount(MemoryPoolMXBean bean, long count){
  63         Asserts.assertEQ(bean.getUsageThresholdCount(), count,
  64                 String.format("Usage threshold was hit: %d times for %s "
  65                         + "Threshold value: %d with current usage: %d",
  66                         bean.getUsageThresholdCount(), bean.getName(),
  67                         bean.getUsageThreshold(), bean.getUsage().getUsed()));
  68     }
  69 
  70     protected void runTest() {
  71         long headerSize = CodeCacheUtils.getHeaderSize(btype);
  72         long allocationUnit = CodeCacheUtils.MIN_ALLOCATION - headerSize;
  73         MemoryPoolMXBean bean = btype.getMemoryPool();
  74         long initialCount = bean.getUsageThresholdCount();
  75         long initialSize = bean.getUsage().getUsed();
  76         bean.setUsageThreshold(initialSize + THRESHOLD_STEP);
  77         for (int i = 0; i < ALLOCATION_STEP - 1; i++) {
  78             CodeCacheUtils.WB.allocateCodeBlob(allocationUnit, btype.id);
  79         }
  80         // Usage threshold check is triggered by GC cycle, so, call it
  81         CodeCacheUtils.WB.fullGC();
  82         checkUsageThresholdCount(bean, initialCount);
  83         long filledSize = bean.getUsage().getUsed();
  84         bean.setUsageThreshold(filledSize + THRESHOLD_STEP);
  85         for (int i = 0; i < ALLOCATION_STEP - 1; i++) {
  86             CodeCacheUtils.WB.allocateCodeBlob(allocationUnit, btype.id);
  87         }
  88         CodeCacheUtils.WB.fullGC();
  89         checkUsageThresholdCount(bean, initialCount);
  90         System.out.println("INFO: Case finished successfully for " + bean.getName());
  91     }
  92 }