1 /*
   2  * Copyright (c) 2014, 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 com.oracle.java.testlibrary.Asserts;
  25 import java.lang.management.MemoryPoolMXBean;
  26 import sun.hotspot.code.BlobType;
  27 
  28 /*
  29  * @test UsageThresholdNotExceededTest
  30  * @library /testlibrary /../../test/lib
  31  * @build com.oracle.java.testlibrary.* UsageThresholdNotExceededTest
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  *     sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
  35  *     -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  36  *     -XX:+SegmentedCodeCache -XX:CompileCommand=compileonly,null::*
  37  *     UsageThresholdNotExceededTest
  38  * @summary verifying that usage threshold not exceeded while allocating less
  39  *     than usage threshold
  40  */
  41 public class UsageThresholdNotExceededTest {
  42 
  43     private final BlobType btype;
  44 
  45     public UsageThresholdNotExceededTest(BlobType btype) {
  46         this.btype = btype;
  47     }
  48 
  49     public static void main(String[] args) {
  50         for (BlobType btype : BlobType.getAvailable()) {
  51             if (CodeCacheUtils.isCodeHeapPredictable(btype)) {
  52                 new UsageThresholdNotExceededTest(btype).runTest();
  53             }
  54         }
  55     }
  56 
  57     protected void runTest() {
  58         MemoryPoolMXBean bean = btype.getMemoryPool();
  59         long initialThresholdCount = bean.getUsageThresholdCount();
  60         long initialUsage = bean.getUsage().getUsed();
  61         bean.setUsageThreshold(initialUsage + 1 + CodeCacheUtils.MIN_ALLOCATION);
  62         CodeCacheUtils.WB.allocateCodeBlob(CodeCacheUtils.MIN_ALLOCATION
  63                 - CodeCacheUtils.getHeaderSize(btype), btype.id);
  64         // a gc cycle triggers usage threshold recalculation
  65         CodeCacheUtils.WB.fullGC();
  66         Asserts.assertEQ(bean.getUsageThresholdCount(), initialThresholdCount,
  67                 String.format("Usage threshold was hit: %d  times for %s. "
  68                         + "Threshold value: %d with current usage: %d",
  69                         bean.getUsageThresholdCount(), bean.getName(),
  70                         bean.getUsageThreshold(), bean.getUsage().getUsed()));
  71 
  72         System.out.println("INFO: Case finished successfully for "
  73                 + bean.getName());
  74     }
  75 }