--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/stress/systemgc/TestSystemGC.java Wed Apr 05 14:21:58 2017 +0200
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+// A test that stresses a full GC by allocating objects of different lifetimes
+// and concurrently calling System.gc().
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.TreeMap;
+
+final class ThreadUtils {
+ public static void sleep(long durationMS) {
+ try {
+ Thread.sleep(durationMS);
+ } catch (Exception e) {
+ }
+ }
+}
+
+class Exitable {
+ private volatile boolean shouldExit = false;
+
+ protected boolean shouldExit() {
+ return shouldExit;
+ }
+
+ public void exit() {
+ shouldExit = true;
+ }
+}
+
+class ShortLivedAllocationTask extends Exitable implements Runnable {
+ private Map<String, String> map = new HashMap<>();
+
+ @Override
+ public void run() {
+ map = new HashMap<>();
+ while (!shouldExit()) {
+ for (int i = 0; i < 200; i++) {
+ String key = "short" + " key = " + i;
+ String value = "the value is " + i;
+ map.put(key, value);
+ }
+ }
+ }
+}
+
+class LongLivedAllocationTask extends Exitable implements Runnable {
+ private Map<String, String> map;
+
+ LongLivedAllocationTask(Map<String, String> map) {
+ this.map = map;
+ }
+
+ @Override
+ public void run() {
+ while (!shouldExit()) {
+ String prefix = "long" + System.currentTimeMillis();
+ for (int i = 0; i < 10; i++) {
+ String key = prefix + " key = " + i;
+ String value = "the value is " + i;
+ map.put(key, value);
+ }
+ }
+ }
+}
+
+class SystemGCTask extends Exitable implements Runnable {
+ private long delayMS;
+
+ SystemGCTask(long delayMS) {
+ this.delayMS = delayMS;
+ }
+
+ @Override
+ public void run() {
+ while (!shouldExit()) {
+ System.gc();
+ ThreadUtils.sleep(delayMS);
+ }
+ }
+}
+
+public class TestSystemGC {
+ private static final int numGroups = 7;
+ private static final int numGCsPerGroup = 4;
+
+ private static Map<String, String> longLivedMap = new TreeMap<>();
+
+ private static void populateLongLived() {
+ for (int i = 0; i < 1000000; i++) {
+ String key = "all" + " key = " + i;
+ String value = "the value is " + i;
+ longLivedMap.put(key, value);
+ }
+ }
+
+ private static long getDelayMS(int group) {
+ if (group == 0) {
+ return 0;
+ }
+
+ int res = 16;
+ for (int i = 0; i < group; i++) {
+ res *= 2;
+ }
+ return res;
+ }
+
+ private static void doSystemGCs() {
+ ThreadUtils.sleep(1000);
+
+ for (int i = 0; i < numGroups; i++) {
+ for (int j = 0; j < numGCsPerGroup; j++) {
+ System.gc();
+ ThreadUtils.sleep(getDelayMS(i));
+ }
+ }
+ }
+
+ private static SystemGCTask createSystemGCTask(int group) {
+ long delay0 = getDelayMS(group);
+ long delay1 = getDelayMS(group + 1);
+ long delay = delay0 + (delay1 - delay0) / 2;
+ return new SystemGCTask(delay);
+ }
+
+ private static void startTask(Runnable task) {
+ if (task != null) {
+ new Thread(task).start();
+ }
+ }
+
+ private static void exitTask(Exitable task) {
+ if (task != null) {
+ task.exit();
+ }
+ }
+
+ private static void runAllPhases() {
+ for (int i = 0; i < 4; i++) {
+ SystemGCTask gcTask =
+ (i % 2 == 1) ? createSystemGCTask(numGroups / 3) : null;
+ ShortLivedAllocationTask shortTask =
+ (i == 1 || i == 3) ? new ShortLivedAllocationTask() : null;
+ LongLivedAllocationTask longTask =
+ (i == 2 || i == 3) ? new LongLivedAllocationTask(longLivedMap) : null;
+
+ startTask(gcTask);
+ startTask(shortTask);
+ startTask(longTask);
+
+ doSystemGCs();
+
+ exitTask(gcTask);
+ exitTask(shortTask);
+ exitTask(longTask);
+
+ ThreadUtils.sleep(1000);
+ }
+ }
+
+ public static void main(String[] args) {
+ // First allocate the long lived objects and then run all phases twice.
+ populateLongLived();
+ runAllPhases();
+ runAllPhases();
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/stress/systemgc/TestSystemGCWithCMS.java Wed Apr 05 14:21:58 2017 +0200
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017, 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 TestSystemGCWithCMS
+ * @key gc
+ * @key stress
+ * @requires vm.gc.ConcMarkSweep
+ * @summary Stress the CMS GC full GC by allocating objects of different lifetimes concurrently with System.gc().
+ * @run main/othervm/timeout=300 -Xlog:gc*=info -Xmx512m -XX:+UseConcMarkSweepGC TestSystemGCWithCMS
+ */
+public class TestSystemGCWithCMS {
+ public static void main(String[] args) {
+ TestSystemGC.main(args);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/stress/systemgc/TestSystemGCWithG1.java Wed Apr 05 14:21:58 2017 +0200
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017, 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 TestSystemGCWithG1
+ * @key gc
+ * @key stress
+ * @requires vm.gc.G1
+ * @summary Stress the G1 GC full GC by allocating objects of different lifetimes concurrently with System.gc().
+ * @run main/othervm/timeout=300 -Xlog:gc*=info -Xmx512m -XX:+UseG1GC TestSystemGCWithG1
+ */
+public class TestSystemGCWithG1 {
+ public static void main(String[] args) {
+ TestSystemGC.main(args);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/stress/systemgc/TestSystemGCWithParallel.java Wed Apr 05 14:21:58 2017 +0200
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017, 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 TestSystemGCWithParallel
+ * @key gc
+ * @key stress
+ * @requires vm.gc.Parallel
+ * @summary Stress the Parallel GC full GC by allocating objects of different lifetimes concurrently with System.gc().
+ * @run main/othervm/timeout=300 -Xlog:gc*=info -Xmx512m -XX:+UseParallelGC TestSystemGCWithParallel
+ */
+public class TestSystemGCWithParallel {
+ public static void main(String[] args) {
+ TestSystemGC.main(args);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/stress/systemgc/TestSystemGCWithSerial.java Wed Apr 05 14:21:58 2017 +0200
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017, 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 TestSystemGCWithSerial
+ * @key gc
+ * @key stress
+ * @requires vm.gc.Serial
+ * @summary Stress the Serial GC full GC by allocating objects of different lifetimes concurrently with System.gc().
+ * @run main/othervm/timeout=300 -Xlog:gc*=info -Xmx512m -XX:+UseSerialGC TestSystemGCWithSerial
+ */
+public class TestSystemGCWithSerial {
+ public static void main(String[] args) {
+ TestSystemGC.main(args);
+ }
+}