109 lines
5.2 KiB
Java
109 lines
5.2 KiB
Java
/*
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* Copyright (c) 2014, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test SpaceUtilizationCheck
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* @summary Check if the space utilization for shared spaces is adequate
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* @requires vm.cds
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* @library /test/lib
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SpaceUtilizationCheck
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*/
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import jdk.test.lib.cds.CDSTestUtils;
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import jdk.test.lib.cds.CDSOptions;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.whitebox.WhiteBox;
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import java.util.regex.Pattern;
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import java.util.regex.Matcher;
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import java.util.ArrayList;
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import java.util.Hashtable;
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import java.lang.Integer;
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public class SpaceUtilizationCheck {
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// For the RW/RO regions:
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// [1] Each region must have strictly less than
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// WhiteBox.metaspaceSharedRegionAlignment() bytes of unused space.
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// [2] There must be no gap between two consecutive regions.
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public static void main(String[] args) throws Exception {
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test("-Xlog:cds=debug");
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}
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static void test(String... extra_options) throws Exception {
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CDSOptions opts = new CDSOptions();
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opts.addSuffix(extra_options);
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OutputAnalyzer output = CDSTestUtils.createArchiveAndCheck(opts);
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Pattern pattern = Pattern.compile("(..) space: *([0-9]+).* out of *([0-9]+) bytes .* at 0x([0-9a0-f]+)");
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WhiteBox wb = WhiteBox.getWhiteBox();
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long reserve_alignment = wb.metaspaceSharedRegionAlignment();
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System.out.println("MetaspaceShared::core_region_alignment() = " + reserve_alignment);
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// Look for output like this. The pattern will only match the first 2 regions, which is what we need to check
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//
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// [0.938s][debug][cds] rw space: 5253952 [ 35.2% of total] out of 5255168 bytes [100.0% used] at 0x0000000800000000
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// [0.938s][debug][cds] ro space: 8353976 [ 55.9% of total] out of 8355840 bytes [100.0% used] at 0x0000000800503000
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// [0.938s][debug][cds] bm space: 262232 [ 1.8% of total] out of 262232 bytes [100.0% used]
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// [0.938s][debug][cds] hp space: 1057712 [ 7.1% of total] out of 1057712 bytes [100.0% used] at 0x00007fa24c180090
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// [0.938s][debug][cds] total : 14927872 [100.0% of total] out of 14934960 bytes [100.0% used]
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long last_region = -1;
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Hashtable<String,String> checked = new Hashtable<>();
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for (String line : output.getStdout().split("\n")) {
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if (line.contains(" space:")) {
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Matcher matcher = pattern.matcher(line);
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if (matcher.find()) {
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String name = matcher.group(1);
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if (!name.equals("rw") && ! name.equals("ro")) {
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continue;
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}
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System.out.println("Checking " + name + " in : " + line);
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checked.put(name, name);
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long used = Long.parseLong(matcher.group(2));
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long capacity = Long.parseLong(matcher.group(3));
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long address = Long.parseLong(matcher.group(4), 16);
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long unused = capacity - used;
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if (unused < 0) {
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throw new RuntimeException("Unused space (" + unused + ") less than 0");
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}
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if (unused > reserve_alignment) {
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// [1] Check for unused space
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throw new RuntimeException("Unused space (" + unused + ") must be smaller than MetaspaceShared::core_region_alignment() (" +
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reserve_alignment + ")");
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}
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if (last_region >= 0 && address != last_region) {
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// [2] Check for no-gap
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throw new RuntimeException("Region 0x" + address + " should have started at 0x" + Long.toString(last_region, 16));
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}
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last_region = address + capacity;
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}
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}
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}
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if (checked.size() != 2) {
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throw new RuntimeException("Must have 2 consecutive, fully utilized regions"); // RW,RO
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}
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}
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}
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