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/*
* Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8031320
* @summary Verify that RTMAbortRatio affects amount of aborts before
* deoptimization.
* @library /test/lib /
* @modules java.base/jdk.internal.misc
* java.management
* @requires vm.rtm.cpu & vm.rtm.compiler
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm/native -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI
* compiler.rtm.locking.TestRTMAbortRatio
*/
package compiler.rtm.locking;
import compiler.testlibrary.rtm.AbortProvoker;
import compiler.testlibrary.rtm.XAbortProvoker;
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 method will be deoptimized on high abort ratio
* as soon as abort ratio reaches RTMAbortRatio's value.
*/
public class TestRTMAbortRatio {
protected void runTestCases() throws Throwable {
verifyAbortRatio(0, false);
verifyAbortRatio(10, false);
verifyAbortRatio(50, false);
verifyAbortRatio(100, false);
verifyAbortRatio(0, true);
verifyAbortRatio(10, true);
verifyAbortRatio(50, true);
verifyAbortRatio(100, true);
}
private void verifyAbortRatio(int abortRatio, boolean useStackLock)
throws Throwable {
CompilableTest test = new Test();
OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
test,
CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
useStackLock),
"-XX:+UseRTMDeopt",
"-XX:RTMTotalCountIncrRate=1",
"-XX:RTMAbortThreshold=0",
CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
10 * Test.TOTAL_ITERATIONS),
CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio",
abortRatio),
"-XX:+PrintPreciseRTMLockingStatistics",
test.getClass().getName(),
Boolean.toString(!useStackLock));
outputAnalyzer.shouldHaveExitValue(0);
List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
test.getMethodWithLockName(), outputAnalyzer.getOutput());
Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
+ "exactly one RTM locking statistics entry.");
RTMLockingStatistics lock = statistics.get(0);
int actualRatio;
if (lock.getTotalAborts() == 1L) {
actualRatio = 0;
} else {
actualRatio = (int) (lock.getTotalLocks()
/ (lock.getTotalAborts() - 1L));
}
Asserts.assertLTE(actualRatio, abortRatio, String.format(
"Actual abort ratio (%d) should lower or equal to "
+ "specified (%d).", actualRatio, abortRatio));
}
/**
* Force abort after {@code Test.WARMUP_ITERATIONS} is done.
*/
public static class Test implements CompilableTest {
private static final int TOTAL_ITERATIONS = 10000;
private static final int WARMUP_ITERATIONS = 1000;
private final XAbortProvoker xabort = new XAbortProvoker();
private final Object monitor = new Object();
// Following field have to be static in order to avoid escape analysis.
@SuppressWarnings("UnsuedDeclaration")
private static int field = 0;
@Override
public String getMethodWithLockName() {
return this.getClass().getName() + "::lock";
}
@Override
public String[] getMethodsToCompileNames() {
return new String[] { getMethodWithLockName(), "*.doAbort" };
}
public void lock(boolean abort) {
synchronized(monitor) {
if (abort) {
xabort.doAbort();
}
}
}
/**
* Usage:
* Test <inflate monitor>
*/
public static void main(String args[]) throws Throwable {
Asserts.assertGTE(args.length, 1, "One argument required.");
Test t = new Test();
boolean shouldBeInflated = Boolean.valueOf(args[0]);
if (shouldBeInflated) {
AbortProvoker.inflateMonitor(t.monitor);
}
for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
t.lock(i >= Test.WARMUP_ITERATIONS);
}
}
}
public static void main(String args[]) throws Throwable {
new TestRTMAbortRatio().runTestCases();
}
}
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