--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/rtm/locking/TestRTMLockingThreshold.java Fri Apr 11 00:35:23 2014 +0400
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2014, 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 RTMLockingThreshold affects rtm state transition
+ * ProfileRTM => UseRTM.
+ * @library /testlibrary /testlibrary/whitebox /compiler/testlibrary
+ * @build TestRTMLockingThreshold
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
+ * -XX:+WhiteBoxAPI TestRTMLockingThreshold
+ */
+
+import java.util.List;
+import com.oracle.java.testlibrary.*;
+import com.oracle.java.testlibrary.cli.CommandLineOptionTest;
+import com.oracle.java.testlibrary.cli.predicate.AndPredicate;
+import rtm.*;
+import rtm.predicate.SupportedCPU;
+import rtm.predicate.SupportedVM;
+import sun.misc.Unsafe;
+
+/**
+ * Test verifies that RTMLockingThreshold option actually affects how soon
+ * method will be deoptimized on low abort ratio.
+ */
+public class TestRTMLockingThreshold extends CommandLineOptionTest {
+ private TestRTMLockingThreshold() {
+ super(new AndPredicate(new SupportedVM(), new SupportedCPU()));
+ }
+
+ /**
+ * We use non-zero abort threshold to avoid abort related to
+ * interrupts, VMM calls, etc. during first lock attempt.
+ *
+ */
+ private static final int ABORT_THRESHOLD = 10;
+
+ @Override
+ protected void runTestCases() throws Throwable {
+ verifyLockingThreshold(0, false);
+ verifyLockingThreshold(100, false);
+ verifyLockingThreshold(1000, false);
+
+ verifyLockingThreshold(0, true);
+ verifyLockingThreshold(100, true);
+ verifyLockingThreshold(1000, true);
+ }
+
+ private void verifyLockingThreshold(int lockingThreshold,
+ boolean useStackLock) throws Throwable {
+ CompilableTest test = new Test();
+
+ OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
+ test,
+ "-XX:CompileThreshold=1",
+ CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
+ useStackLock),
+ "-XX:+UseRTMDeopt",
+ "-XX:RTMTotalCountIncrRate=1",
+ "-XX:RTMRetryCount=0",
+ CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
+ TestRTMLockingThreshold.ABORT_THRESHOLD),
+ CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
+ lockingThreshold),
+ "-XX:RTMAbortRatio=100",
+ "-XX:+PrintPreciseRTMLockingStatistics",
+ Test.class.getName(),
+ Boolean.toString(!useStackLock),
+ Integer.toString(lockingThreshold)
+ );
+
+ outputAnalyzer.shouldHaveExitValue(0);
+
+ List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
+ test.getMethodWithLockName(), outputAnalyzer.getOutput());
+
+ Asserts.assertEQ(statistics.size(), 2, "VM output should contain two "
+ + "RTM locking statistics entries.");
+
+ /**
+ * We force abort on each odd iteration, so if RTMLockingThreshold==0,
+ * then we have to make 1 call without abort to avoid rtm state
+ * transition to NoRTM (otherwise actual abort ratio will be 100%),
+ * and after that make 1 call with abort to force deoptimization.
+ * This leads us to two locks for threshold 0.
+ * For other threshold values we have to make RTMLockingThreshold + 1
+ * locks if locking threshold is even, or + 0 if odd.
+ */
+ long expectedValue = lockingThreshold +
+ (lockingThreshold == 0L ? 2L : lockingThreshold % 2L);
+
+ RTMLockingStatistics statBeforeDeopt = null;
+ for (RTMLockingStatistics s : statistics) {
+ if (s.getTotalLocks() == expectedValue) {
+ Asserts.assertNull(statBeforeDeopt,
+ "Only one statistics entry should contain aborts");
+ statBeforeDeopt = s;
+ }
+ }
+
+ Asserts.assertNotNull(statBeforeDeopt, "There should be exactly one "
+ + "statistics entry corresponding to ProfileRTM state.");
+ }
+
+ public static class Test implements CompilableTest {
+ // Following field have to be static in order to avoid escape analysis.
+ @SuppressWarnings("UnsuedDeclaration")
+ private static int field = 0;
+ private static final int TOTAL_ITERATIONS = 10000;
+ private static final Unsafe UNSAFE = Utils.getUnsafe();
+ private final Object monitor = new Object();
+
+
+ @Override
+ public String getMethodWithLockName() {
+ return this.getClass().getName() + "::lock";
+ }
+
+ @Override
+ public String[] getMethodsToCompileNames() {
+ return new String[] {
+ getMethodWithLockName(),
+ sun.misc.Unsafe.class.getName() + "::addressSize"
+ };
+ }
+
+ public void lock(boolean abort) {
+ synchronized(monitor) {
+ if (abort) {
+ Test.field += Test.UNSAFE.addressSize();
+ }
+ }
+ }
+
+ /**
+ * Usage:
+ * Test <inflate monitor>
+ */
+ public static void main(String args[]) throws Throwable {
+ Asserts.assertGTE(args.length, 1, "One argument required.");
+ Test t = new Test();
+
+ if (Boolean.valueOf(args[0])) {
+ AbortProvoker.inflateMonitor(t.monitor);
+ }
+ for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
+ t.lock(i % 2 == 1);
+ }
+ }
+ }
+
+ public static void main(String args[]) throws Throwable {
+ new TestRTMLockingThreshold().test();
+ }
+}