122 lines
4.7 KiB
Java
122 lines
4.7 KiB
Java
/*
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* Copyright (c) 2014, 2022, 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
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* @bug 8031320
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* @summary Verify that RTMSpinLoopCount affects time spent
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* between locking attempts.
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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* java.management
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* @requires vm.rtm.cpu & vm.rtm.compiler
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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
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* -XX:+WhiteBoxAPI
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* compiler.rtm.locking.TestRTMSpinLoopCount
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*/
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package compiler.rtm.locking;
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import compiler.testlibrary.rtm.BusyLock;
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import compiler.testlibrary.rtm.CompilableTest;
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import compiler.testlibrary.rtm.RTMLockingStatistics;
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import compiler.testlibrary.rtm.RTMTestBase;
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import jdk.test.lib.Asserts;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.cli.CommandLineOptionTest;
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import jdk.test.lib.Platform;
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import java.util.List;
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/**
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* Test verifies that RTMSpinLoopCount increase time spent between retries
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* by comparing amount of retries done with different RTMSpinLoopCount's values.
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*/
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public class TestRTMSpinLoopCount {
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private static final int LOCKING_TIME = 1000;
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private static final int RTM_RETRY_COUNT = 1000;
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private static final boolean INFLATE_MONITOR = true;
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private static final long MAX_ABORTS = RTM_RETRY_COUNT + 1L;
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private static int[] SPIN_LOOP_COUNTS;
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protected void runTestCases() throws Throwable {
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SPIN_LOOP_COUNTS = new int[] { 0, 100, 1_000, 10_000, 100_000 };
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long[] aborts = new long[TestRTMSpinLoopCount.SPIN_LOOP_COUNTS.length];
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for (int i = 0; i < TestRTMSpinLoopCount.SPIN_LOOP_COUNTS.length; i++) {
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aborts[i] = getAbortsCountOnLockBusy(
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TestRTMSpinLoopCount.SPIN_LOOP_COUNTS[i]);
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}
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for (int i = 1; i < aborts.length; i++) {
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Asserts.assertLTE(aborts[i], aborts[i - 1], "Increased spin loop "
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+ "count should not increase retries count.");
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}
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}
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private long getAbortsCountOnLockBusy(int spinLoopCount) throws Throwable {
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CompilableTest test = new BusyLock();
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OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
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test,
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CommandLineOptionTest.prepareNumericFlag("RTMRetryCount",
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TestRTMSpinLoopCount.RTM_RETRY_COUNT),
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CommandLineOptionTest.prepareNumericFlag("RTMSpinLoopCount",
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spinLoopCount),
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"-XX:-UseRTMXendForLockBusy",
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"-XX:RTMTotalCountIncrRate=1",
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"-XX:+PrintPreciseRTMLockingStatistics",
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BusyLock.class.getName(),
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Boolean.toString(TestRTMSpinLoopCount.INFLATE_MONITOR),
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Integer.toString(TestRTMSpinLoopCount.LOCKING_TIME)
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);
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outputAnalyzer.shouldHaveExitValue(0);
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List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
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test.getMethodWithLockName(), outputAnalyzer.getOutput());
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Asserts.assertEQ(statistics.size(), 1,
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"VM output should contain exactly one entry for method "
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+ test.getMethodWithLockName());
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RTMLockingStatistics lock = statistics.get(0);
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Asserts.assertLTE(lock.getTotalAborts(),
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TestRTMSpinLoopCount.MAX_ABORTS, String.format("Total aborts "
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+ "count (%d) should be less or equal to %d",
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lock.getTotalAborts(),
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TestRTMSpinLoopCount.MAX_ABORTS));
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return lock.getTotalAborts();
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}
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public static void main(String args[]) throws Throwable {
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new TestRTMSpinLoopCount().runTestCases();
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}
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}
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