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 InitialAndMaxUsageTest
26 * @summary testing of initial and max usage
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:-UseCodeCacheFlushing
35 *     -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
36 *     -XX:CompileCommand=compileonly,null::* -XX:-UseLargePages
37 *     -XX:+SegmentedCodeCache
38 *     compiler.codecache.jmx.InitialAndMaxUsageTest
39 * @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
40 *     -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
41 *     -XX:CompileCommand=compileonly,null::* -XX:-UseLargePages
42 *     -XX:-SegmentedCodeCache
43 *     compiler.codecache.jmx.InitialAndMaxUsageTest
44 */
45
46package compiler.codecache.jmx;
47
48import jdk.test.lib.Asserts;
49import sun.hotspot.code.BlobType;
50
51import java.lang.management.MemoryPoolMXBean;
52import java.util.ArrayList;
53import java.util.List;
54
55public class InitialAndMaxUsageTest {
56
57    private static final double CACHE_USAGE_COEF = 0.95d;
58    private final BlobType btype;
59    private final boolean lowerBoundIsZero;
60    private final long maxSize;
61
62    public InitialAndMaxUsageTest(BlobType btype) {
63        this.btype = btype;
64        this.maxSize = btype.getSize();
65        /* Only profiled code cache initial size should be 0, because of
66         -XX:CompileCommand=compileonly,null::* non-methods might be not empty,
67         as well as non-profiled methods, because it's used as fallback in
68         case non-methods is full */
69        lowerBoundIsZero = btype == BlobType.MethodProfiled;
70    }
71
72    public static void main(String[] args) {
73        for (BlobType btype : BlobType.getAvailable()) {
74            new InitialAndMaxUsageTest(btype).runTest();
75        }
76    }
77
78    private void fillWithSize(long size, List<Long> blobs, MemoryPoolMXBean bean) {
79        long blob;
80        /* Don't fill too much to have space for adapters. So, stop after crossing 95% and
81           don't allocate in case we'll cross 97% on next allocation. We can hit situation
82           like 94% -> (1 allocation) -> 100% otherwise. So, check if
83           <Usage + allocatedSize> is less than 97%, then allocate in case it is, then, stop
84           further allocations with given size in case <Usage> more than 95% */
85        while (((double) bean.getUsage().getUsed() + size <= (CACHE_USAGE_COEF + 0.02d)  * maxSize)
86                && (blob = CodeCacheUtils.WB.allocateCodeBlob(size, btype.id)) != 0L
87                && ((double) bean.getUsage().getUsed() <= CACHE_USAGE_COEF * maxSize)) {
88            blobs.add(blob);
89        }
90    }
91
92    protected void runTest() {
93        long headerSize = CodeCacheUtils.getHeaderSize(btype);
94        MemoryPoolMXBean bean = btype.getMemoryPool();
95        long initialUsage = btype.getMemoryPool().getUsage().getUsed();
96        System.out.printf("INFO: trying to test %s of max size %d and initial"
97                + " usage %d%n", bean.getName(), maxSize, initialUsage);
98        Asserts.assertLT(initialUsage + headerSize + 1L, maxSize,
99                "Initial usage is close to total size for " + bean.getName());
100        if (lowerBoundIsZero) {
101            Asserts.assertEQ(initialUsage, 0L, "Unexpected initial usage");
102        }
103        ArrayList<Long> blobs = new ArrayList<>();
104        long minAllocationUnit = Math.max(1, CodeCacheUtils.MIN_ALLOCATION - headerSize);
105        /* now filling code cache with large-sized allocation first, since
106         lots of small allocations takes too much time, so, just a small
107         optimization */
108        try {
109            for (int coef = 1000000; coef > 0; coef /= 10) {
110                fillWithSize(coef * minAllocationUnit, blobs, bean);
111            }
112            Asserts.assertGT((double) bean.getUsage().getUsed(),
113                    CACHE_USAGE_COEF * maxSize, String.format("Unable to fill "
114                            + "more than %f of %s. Reported usage is %d ",
115                            CACHE_USAGE_COEF, bean.getName(),
116                            bean.getUsage().getUsed()));
117        } finally {
118            for (long entry : blobs) {
119                CodeCacheUtils.WB.freeCodeBlob(entry);
120            }
121        }
122        System.out.printf("INFO: Scenario finished successfully for %s%n",
123                bean.getName());
124    }
125
126}
127