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/*
* Copyright (c) 2014, 2016, 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 on low abort ratio method will be recompiled.
* @library /test/lib /
* @modules java.base/jdk.internal.misc
* java.management
* @requires vm.flavor == "server" & !vm.emulatedClient & vm.rtm.cpu & vm.rtm.os
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI
* compiler.rtm.locking.TestRTMDeoptOnLowAbortRatio
*/
package compiler.rtm.locking;
import compiler.testlibrary.rtm.AbortProvoker;
import compiler.testlibrary.rtm.CompilableTest;
import compiler.testlibrary.rtm.RTMLockingStatistics;
import compiler.testlibrary.rtm.RTMTestBase;
import jdk.internal.misc.Unsafe;
import jdk.test.lib.Asserts;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.cli.CommandLineOptionTest;
import java.util.List;
/**
* Test verifies that low abort ratio method will be deoptimized with
* <i>rtm_state_change</i> reason and will continue to use RTM-based lock
* elision after that.
* This test make asserts on total locks count done by compiled method,
* so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used.
* For more details on that issue see {@link TestUseRTMAfterLockInflation}.
*/
public class TestRTMDeoptOnLowAbortRatio {
private static final long LOCKING_THRESHOLD = 100L;
private static final long ABORT_THRESHOLD = LOCKING_THRESHOLD / 2L;
protected void runTestCases() throws Throwable {
verifyRTMDeopt(false);
verifyRTMDeopt(true);
}
private void verifyRTMDeopt(boolean useStackLock) throws Throwable {
CompilableTest test = new Test();
String logFileName = String.format("rtm_deopt_%s_stack_lock.xml",
useStackLock ? "use" : "no");
OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
logFileName,
test,
"-XX:+UseRTMDeopt",
CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
useStackLock),
CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD),
CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD),
"-XX:RTMAbortRatio=100",
"-XX:CompileThreshold=1",
"-XX:RTMRetryCount=0",
"-XX:RTMTotalCountIncrRate=1",
"-XX:+PrintPreciseRTMLockingStatistics",
Test.class.getName(),
Boolean.toString(!useStackLock)
);
outputAnalyzer.shouldHaveExitValue(0);
int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName);
Asserts.assertEQ(firedTraps, 1,
"Expected to get only one deoptimization due to rtm"
+ " state change");
List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
test.getMethodWithLockName(), outputAnalyzer.getOutput());
Asserts.assertEQ(statistics.size(), 2,
"VM output should contain two RTM locking "
+ "statistics entries for method "
+ test.getMethodWithLockName());
RTMLockingStatistics statisticsBeforeDeopt = null;
for (RTMLockingStatistics s : statistics) {
if (s.getTotalLocks()
== TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD) {
Asserts.assertNull(statisticsBeforeDeopt,
"Only one abort was expected during test run");
statisticsBeforeDeopt = s;
}
}
Asserts.assertNotNull(statisticsBeforeDeopt,
"After LockThreshold was reached, method should be recompiled "
+ "with rtm lock eliding.");
}
public static class Test implements CompilableTest {
private static final Unsafe UNSAFE = Unsafe.getUnsafe();
private final Object monitor = new Object();
@Override
public String getMethodWithLockName() {
return this.getClass().getName() + "::forceAbort";
}
@Override
public String[] getMethodsToCompileNames() {
return new String[] { getMethodWithLockName() };
}
public void forceAbort(boolean abort) {
synchronized(monitor) {
if (abort) {
Test.UNSAFE.pageSize();
}
}
}
/**
* 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 < AbortProvoker.DEFAULT_ITERATIONS; i++) {
AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
t.forceAbort(i >= TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD);
}
}
}
public static void main(String args[]) throws Throwable {
new TestRTMDeoptOnLowAbortRatio().runTestCases();
}
}
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