--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/g1/mixedgc/TestLogging.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2015, 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 TestLogging
+ * @summary Check that a mixed GC is reflected in the gc logs
+ * @requires vm.gc.G1
+ * @requires vm.opt.MaxGCPauseMillis == "null"
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ * @modules java.management
+ * @build sun.hotspot.WhiteBox
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run driver gc.g1.mixedgc.TestLogging
+ */
+
+package gc.g1.mixedgc;
+
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.Asserts;
+import sun.hotspot.WhiteBox;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Collections;
+
+/**
+ * Test spawns MixedGCProvoker in a separate VM and expects to find a message
+ * telling that a mixed gc has happened
+ */
+public class TestLogging {
+ private static final String[] COMMON_OPTIONS = new String[]{
+ "-Xbootclasspath/a:.", "-XX:+UseG1GC",
+ "-XX:+UnlockExperimentalVMOptions",
+ "-XX:+UnlockDiagnosticVMOptions",
+ "-XX:+WhiteBoxAPI",
+ "-XX:SurvivorRatio=1", // Survivor-to-eden ratio is 1:1
+ "-Xms10M", "-Xmx10M",
+ "-XX:MaxTenuringThreshold=1", // promote objects after first gc
+ "-XX:InitiatingHeapOccupancyPercent=100", // set initial CMC threshold and disable adaptive IHOP
+ "-XX:-G1UseAdaptiveIHOP", // to avoid additional concurrent cycles caused by ergonomics
+ "-XX:G1MixedGCCountTarget=4",
+ "-XX:MaxGCPauseMillis=30000", // to have enough time
+ "-XX:G1HeapRegionSize=1m", "-XX:G1HeapWastePercent=0",
+ "-XX:G1MixedGCLiveThresholdPercent=100"};
+
+ public static final int ALLOCATION_SIZE = 20000;
+ public static final int ALLOCATION_COUNT = 15;
+
+ public static void main(String args[]) throws Exception {
+ // Test turns logging on by giving -Xlog:gc flag
+ test("-Xlog:gc");
+ // Test turns logging on by giving -Xlog:gc=debug flag
+ test("-Xlog:gc=debug");
+ }
+
+ private static void test(String vmFlag) throws Exception {
+ System.out.println(String.format("%s: running with %s flag", TestLogging.class.getSimpleName(), vmFlag));
+ OutputAnalyzer output = spawnMixedGCProvoker(vmFlag);
+ System.out.println(output.getStdout());
+ output.shouldHaveExitValue(0);
+ output.shouldContain("Pause Mixed (G1 Evacuation Pause)");
+ }
+
+ /**
+ * Method spawns MixedGCProvoker with addition flags set
+ *
+ * @parameter extraFlags -flags to be added to the common options set
+ */
+ private static OutputAnalyzer spawnMixedGCProvoker(String... extraFlags)
+ throws Exception {
+ List<String> testOpts = new ArrayList<>();
+ Collections.addAll(testOpts, COMMON_OPTIONS);
+ Collections.addAll(testOpts, extraFlags);
+ testOpts.add(MixedGCProvoker.class.getName());
+ System.out.println(testOpts);
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false,
+ testOpts.toArray(new String[testOpts.size()]));
+ return new OutputAnalyzer(pb.start());
+ }
+}
+
+/**
+ * Utility class to guarantee a mixed GC. The class allocates several arrays and
+ * promotes them to the oldgen. After that it tries to provoke mixed GC by
+ * allocating new objects.
+ *
+ * The necessary condition for guaranteed mixed GC is running MixedGCProvoker is
+ * running in VM with the following flags: -XX:MaxTenuringThreshold=1, -Xms10M,
+ * -Xmx10M, -XX:G1MixedGCLiveThresholdPercent=100, -XX:G1HeapWastePercent=0,
+ * -XX:G1HeapRegionSize=1m
+ */
+class MixedGCProvoker {
+ private static final WhiteBox WB = WhiteBox.getWhiteBox();
+ private static final List<byte[]> liveOldObjects = new ArrayList<>();
+ private static final List<byte[]> newObjects = new ArrayList<>();
+
+ private static void allocateOldObjects() throws Exception {
+ List<byte[]> deadOldObjects = new ArrayList<>();
+ // Allocates buffer and promotes it to the old gen. Mix live and dead old
+ // objects
+ for (int i = 0; i < TestLogging.ALLOCATION_COUNT; ++i) {
+ liveOldObjects.add(new byte[TestLogging.ALLOCATION_SIZE * 5]);
+ deadOldObjects.add(new byte[TestLogging.ALLOCATION_SIZE * 5]);
+ }
+
+ // need only 2 promotions to promote objects to the old gen
+ WB.youngGC();
+ WB.youngGC();
+ // check it is promoted & keep alive
+ Asserts.assertTrue(WB.isObjectInOldGen(liveOldObjects),
+ "List of the objects is suppose to be in OldGen");
+ Asserts.assertTrue(WB.isObjectInOldGen(deadOldObjects),
+ "List of the objects is suppose to be in OldGen");
+ }
+
+
+ /**
+ * Waits until Concurent Mark Cycle finishes
+ * @param wb Whitebox instance
+ * @param sleepTime sleep time
+ */
+ public static void waitTillCMCFinished(WhiteBox wb, int sleepTime) {
+ while (wb.g1InConcurrentMark()) {
+ if (sleepTime > -1) {
+ try {
+ Thread.sleep(sleepTime);
+ } catch (InterruptedException e) {
+ System.out.println("Got InterruptedException while waiting for ConcMarkCycle to finish");
+ }
+ }
+ }
+ }
+
+
+
+ public static void main(String args[]) throws Exception {
+ // allocate old objects
+ allocateOldObjects();
+ waitTillCMCFinished(WB, 0);
+ WB.g1StartConcMarkCycle();
+ waitTillCMCFinished(WB, 0);
+
+ WB.youngGC();
+ System.out.println("Allocating new objects to provoke mixed GC");
+ // allocate more objects to provoke GC
+ for (int i = 0; i < (TestLogging.ALLOCATION_COUNT * 20); i++) {
+ newObjects.add(new byte[TestLogging.ALLOCATION_SIZE]);
+ }
+ // check that liveOldObjects still alive
+ Asserts.assertTrue(WB.isObjectInOldGen(liveOldObjects),
+ "List of the objects is suppose to be in OldGen");
+ }
+}