TestRTMRetryCount.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/**
 * @test
 * @bug 8031320
 * @summary Verify that RTMRetryCount affects actual amount of retries.
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @requires vm.rtm.cpu & vm.rtm.compiler
 * @build sun.hotspot.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI
 *                   compiler.rtm.locking.TestRTMRetryCount
 */

package compiler.rtm.locking;

import compiler.testlibrary.rtm.BusyLock;
import compiler.testlibrary.rtm.CompilableTest;
import compiler.testlibrary.rtm.RTMLockingStatistics;
import compiler.testlibrary.rtm.RTMTestBase;
import jdk.test.lib.Asserts;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.cli.CommandLineOptionTest;

import java.util.List;

/**
 * Test verifies that RTMRetryCount option actually affects amount of
 * retries on lock busy.
 */
public class TestRTMRetryCount {
    /**
     * Time in ms, during which busy lock will be locked.
     */
    private static final int LOCKING_TIME = 5000;
    private static final boolean INFLATE_MONITOR = true;

    protected void runTestCases() throws Throwable {
        verifyRTMRetryCount(0);
        verifyRTMRetryCount(1);
        verifyRTMRetryCount(5);
        verifyRTMRetryCount(10);
    }

    private void verifyRTMRetryCount(int retryCount) throws Throwable {
        CompilableTest busyLock = new BusyLock();
        long expectedAborts = retryCount + 1L;

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
                busyLock,
                "-XX:-UseRTMXendForLockBusy",
                "-XX:RTMTotalCountIncrRate=1",
                CommandLineOptionTest.prepareNumericFlag("RTMRetryCount",
                        retryCount),
                "-XX:RTMTotalCountIncrRate=1",
                "-XX:+PrintPreciseRTMLockingStatistics",
                BusyLock.class.getName(),
                Boolean.toString(TestRTMRetryCount.INFLATE_MONITOR),
                Integer.toString(TestRTMRetryCount.LOCKING_TIME)
        );

        outputAnalyzer.shouldHaveExitValue(0);

        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
                busyLock.getMethodWithLockName(), outputAnalyzer.getStdout());

        Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
                + "exactly one rtm locking statistics entry for method "
                + busyLock.getMethodWithLockName());

        Asserts.assertEQ(statistics.get(0).getTotalAborts(), expectedAborts,
                String.format("It is expected to get %d aborts",
                        expectedAborts));
    }

    public static void main(String args[]) throws Throwable {
        new TestRTMRetryCount().runTestCases();
    }
}