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 java.util.ArrayList;
  27 import java.util.List;
  28 import sun.hotspot.code.BlobType;
  29 
  30 /*
  31  * @test InitialAndMaxUsageTest
  32  * @library /testlibrary /testlibrary/whitebox
  33  * @build InitialAndMaxUsageTest
  34  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  35  *     sun.hotspot.WhiteBox$WhiteBoxPermission
  36  * @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
  37  *     -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  38  *     -XX:+SegmentedCodeCache -XX:CompileCommand=compileonly,null::*
  39  *     InitialAndMaxUsageTest
  40  * @summary testing of initial and max usage
  41  */
  42 public class InitialAndMaxUsageTest {
  43 
  44     private static final double CACHE_USAGE_COEF = 0.95d;
  45     private final BlobType btype;
  46     private final boolean lowerBoundIsZero;
  47     private final long maxSize;
  48 
  49     public InitialAndMaxUsageTest(BlobType btype) {
  50         this.btype = btype;
  51         this.maxSize = btype.getSize();
  52         /* Only profiled code cache initial size should be 0, because of
  53          -XX:CompileCommand=compileonly,null::* non-methods might be not empty,
  54          as well as non-profiled methods, because it's used as fallback in
  55          case non-methods is full */
  56         lowerBoundIsZero = btype == BlobType.MethodProfiled;
  57     }
  58 
  59     public static void main(String[] args) {
  60         for (BlobType btype : BlobType.getAvailable()) {
  61             new InitialAndMaxUsageTest(btype).runTest();
  62         }
  63     }
  64 
  65     private void fillWithSize(long size, List<Long> blobs) {
  66         long blob;
  67         while ((blob = CodeCacheUtils.WB.allocateCodeBlob(size, btype.id))
  68                 != 0L) {
  69             blobs.add(blob);
  70         }
  71     }
  72 
  73     protected void runTest() {
  74         long headerSize = CodeCacheUtils.getHeaderSize(btype);
  75         MemoryPoolMXBean bean = btype.getMemoryPool();
  76         long initialUsage = btype.getMemoryPool().getUsage().getUsed();
  77         System.out.printf("INFO: trying to test %s of max size %d and initial"
  78                 + " usage %d%n", bean.getName(), maxSize, initialUsage);
  79         Asserts.assertLT(initialUsage + headerSize + 1L, maxSize,
  80                 "Initial usage is close to total size for " + bean.getName());
  81         if (lowerBoundIsZero) {
  82             Asserts.assertEQ(initialUsage, 0L, "Unexpected initial usage");
  83         }
  84         ArrayList<Long> blobs = new ArrayList<>();
  85         long minAllocationUnit = CodeCacheUtils.MIN_ALLOCATION - headerSize;
  86         /* now filling code cache with large-sized allocation first, since
  87          lots of small allocations takes too much time, so, just a small
  88          optimization */
  89         try {
  90             for (int coef = 1000000; coef > 0; coef /= 10) {
  91                 fillWithSize(coef * minAllocationUnit, blobs);
  92             }
  93             Asserts.assertGT((double) bean.getUsage().getUsed(),
  94                     CACHE_USAGE_COEF * maxSize, String.format("Unable to fill "
  95                             + "more than %f of %s. Reported usage is %d ",
  96                             CACHE_USAGE_COEF, bean.getName(),
  97                             bean.getUsage().getUsed()));
  98         } finally {
  99             for (long entry : blobs) {
 100                 CodeCacheUtils.WB.freeCodeBlob(entry);
 101             }
 102         }
 103         System.out.printf("INFO: Scenario finished successfully for %s%n",
 104                 bean.getName());
 105     }
 106 
 107 }