test/hotspot/jtreg/runtime/cds/appcds/ParallelLoadTest.java
author iklam
Sun, 22 Sep 2019 17:16:35 -0700
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child 58300 c3b93d6603f5
permissions -rw-r--r--
8231125: Improve testing of parallel loading of shared classes by the boot class loader Reviewed-by: ccheung, coleenp, dholmes
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/*
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 * Copyright (c) 2014, 2019, 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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/*
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 * @test
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 * @summary Load app classes from CDS archive in parallel threads
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 * @library /test/lib
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 * @requires vm.cds
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 * @modules jdk.jartool/sun.tools.jar
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 * @compile test-classes/ParallelLoad.java
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 * @compile test-classes/ParallelClasses.java
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 * @run driver ParallelLoadTest
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 */
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public class ParallelLoadTest {
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    public static final int MAX_CLASSES = 40;
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    /* For easy stress testing, do this:
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       i=0; while jtreg -DParallelLoadTest.app.loops=100 -DParallelLoadTest.boot.loops=100 \
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           ParallelLoadTest.java; do i=$(expr $i + 1); echo =====$i; done
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     */
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    private static final int APP_LOOPS  = Integer.parseInt(System.getProperty("ParallelLoadTest.app.loops", "1"));
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    private static final int BOOT_LOOPS = Integer.parseInt(System.getProperty("ParallelLoadTest.boot.loops", "1"));
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    public static void main(String[] args) throws Exception {
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        JarBuilder.build("parallel_load", getClassList(true));
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        String testJar = TestCommon.getTestJar("parallel_load.jar");
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        // (1) Load the classes from app class loader
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        TestCommon.testDump(testJar, getClassList(false));
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        for (int i = 0; i < APP_LOOPS; i++) {
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            TestCommon.run("-cp", testJar,  "ParallelLoad").assertNormalExit();
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        }
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        // (2) Load the classes from boot class loader
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        String bootcp = "-Xbootclasspath/a:" + testJar;
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        TestCommon.testDump(null, getClassList(false), bootcp);
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        for (int i = 0; i < BOOT_LOOPS; i++) {
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            TestCommon.run(bootcp,
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                           // "-Xlog:class+load=debug",
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                           "ParallelLoad").assertNormalExit();
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        }
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    }
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    private static String[] getClassList(boolean includeWatchdog) {
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        int extra = includeWatchdog ? 3 : 2;
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        String[] classList = new String[MAX_CLASSES + extra];
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        int i;
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        for (i = 0; i < MAX_CLASSES; i++) {
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            classList[i] = "ParallelClass" + i;
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        }
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        classList[i++] = "ParallelLoad";
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        classList[i++] = "ParallelLoadThread";
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        if (includeWatchdog)
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            classList[i++] = "ParallelLoadWatchdog";
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        return classList;
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    }
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}