| /* |
| * 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 TestNewSizeThreadIncrease |
| * @key gc |
| * @bug 8144527 |
| * @summary Tests argument processing for NewSizeThreadIncrease |
| * @library /test/lib |
| * @requires vm.gc.Serial |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| */ |
| |
| |
| import jdk.test.lib.Platform; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.process.ProcessTools; |
| |
| |
| // Range of NewSizeThreadIncrease is 0 ~ max_uintx. |
| // Total of 5 threads will be created (1 GCTest thread and 4 TestThread). |
| public class TestNewSizeThreadIncrease { |
| static final String VALID_VALUE = "2097152"; // 2MB |
| |
| // This value will make an overflow of 'thread count * NewSizeThreadIncrease' at DefNewGeneration::compute_new_size(). |
| // = (max_uintx / 5) + 1, = (18446744073709551615 / 5) + 1 |
| static String INVALID_VALUE_1 = "3689348814741910324"; |
| |
| // This string is contained when compute_new_size() expands or shrinks. |
| static final String LOG_NEWSIZE_CHANGED = "New generation size "; |
| |
| public static void main(String[] args) throws Exception { |
| if (Platform.is32bit()) { |
| // (max_uintx / 5) + 1, 4294967295/5 + 1 |
| INVALID_VALUE_1 = "858993460"; |
| } |
| |
| // New size will be applied as NewSizeThreadIncrease is small enough to expand. |
| runNewSizeThreadIncreaseTest(VALID_VALUE, true); |
| |
| // New size will be ignored as 'thread count * NewSizeThreadIncrease' overflows. |
| runNewSizeThreadIncreaseTest(INVALID_VALUE_1, false); |
| } |
| |
| static void runNewSizeThreadIncreaseTest(String expectedValue, boolean isNewsizeChanged) throws Exception { |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseSerialGC", |
| "-Xms96M", |
| "-Xmx128M", |
| "-XX:NewRatio=2", |
| "-Xlog:gc+heap+ergo=debug", |
| "-XX:NewSizeThreadIncrease="+expectedValue, |
| GCTest.class.getName()); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| |
| output.shouldHaveExitValue(0); |
| |
| if (isNewsizeChanged) { |
| output.shouldContain(LOG_NEWSIZE_CHANGED); |
| } else { |
| output.shouldNotContain(LOG_NEWSIZE_CHANGED); |
| } |
| } |
| |
| static class GCTest { |
| |
| static final int MAX_THREADS_COUNT = 4; |
| static TestThread threads[] = new TestThread[MAX_THREADS_COUNT]; |
| |
| public static void main(String[] args) { |
| |
| System.out.println("Creating garbage"); |
| |
| for (int i=0; i<MAX_THREADS_COUNT; i++) { |
| threads[i] = new TestThread(); |
| threads[i].start(); |
| } |
| |
| System.gc(); |
| |
| for (int i=0; i<MAX_THREADS_COUNT; i++) { |
| threads[i].stopRunning(); |
| } |
| |
| System.out.println("Done"); |
| } |
| |
| private static class TestThread extends Thread { |
| |
| volatile boolean isRunning = true; |
| |
| public void run() { |
| while (isRunning == true) { |
| try { |
| Thread.sleep(10); |
| } catch (Throwable t) { |
| } |
| } |
| } |
| |
| public void stopRunning() { |
| isRunning = false; |
| } |
| } |
| } |
| } |