| /* |
| * Copyright (c) 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. |
| */ |
| |
| package gc.logging; |
| |
| import jdk.test.lib.Utils; |
| |
| import javax.management.InstanceNotFoundException; |
| import javax.management.MBeanException; |
| import javax.management.MBeanServer; |
| import javax.management.MalformedObjectNameException; |
| import javax.management.ObjectName; |
| import javax.management.ReflectionException; |
| |
| import static gc.testlibrary.Allocation.blackHole; |
| |
| import java.lang.management.ManagementFactory; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Random; |
| |
| |
| /** |
| * @test TestUnifiedLoggingSwitchStress |
| * @key gc stress |
| * @summary Switches gc log level on fly while stressing memory/gc |
| * @requires !vm.flightRecorder |
| * @requires vm.gc != "Z" |
| * @library /test/lib / |
| * @modules java.management java.base/jdk.internal.misc |
| * |
| * @run main/othervm -Xmx256M -Xms256M |
| * gc.logging.TestUnifiedLoggingSwitchStress 60 |
| */ |
| |
| class MemoryStresser implements Runnable { |
| public static volatile boolean shouldStop = false; |
| |
| private final List<byte[]> liveObjects = new LinkedList<>(); |
| private final List<byte[]> liveHObjects = new LinkedList<>(); |
| private int maxSimpleAllocationMemory = 0; |
| private int usedMemory = 0; |
| |
| /** |
| * Maximum amount of huge allocations |
| */ |
| private static int H_ALLOCATION_MAX_COUNT = 4; |
| /** |
| * Maximum regions in one huge allocation |
| */ |
| private static int H_ALLOCATION_REGION_SIZE = 2; |
| private static final int G1_REGION_SIZE = 1024 * 1024; |
| /** |
| * Maximum size of simple allocation |
| */ |
| private static final int MAX_SIMPLE_ALLOCATION_SIZE = (int) (G1_REGION_SIZE / 2 * 0.9); |
| |
| /** |
| * Maximum size of dead (i.e. one which is made unreachable right after allocation) object |
| */ |
| private static final int DEAD_OBJECT_MAX_SIZE = G1_REGION_SIZE / 10; |
| private static final Random RND = Utils.getRandomInstance(); |
| |
| /** |
| * @param maxMemory maximum memory that could be allocated |
| */ |
| public MemoryStresser(int maxMemory) { |
| maxSimpleAllocationMemory = maxMemory - G1_REGION_SIZE * H_ALLOCATION_MAX_COUNT * H_ALLOCATION_REGION_SIZE; |
| } |
| |
| public final Runnable[] actions = new Runnable[]{ |
| // Huge allocation |
| () -> { |
| if (liveHObjects.size() < H_ALLOCATION_MAX_COUNT) { |
| int allocationSize = RND.nextInt((int) (G1_REGION_SIZE * (H_ALLOCATION_REGION_SIZE - 0.5) |
| * 0.9)); |
| liveHObjects.add(new byte[allocationSize + G1_REGION_SIZE / 2]); |
| } |
| }, |
| |
| // Huge deallocation |
| () -> { |
| if (liveHObjects.size() > 0) { |
| int elementNum = RND.nextInt(liveHObjects.size()); |
| liveHObjects.remove(elementNum); |
| } |
| }, |
| |
| // Simple allocation |
| () -> { |
| if (maxSimpleAllocationMemory - usedMemory != 0) { |
| int arraySize = RND.nextInt(Math.min(maxSimpleAllocationMemory - usedMemory, |
| MAX_SIMPLE_ALLOCATION_SIZE)); |
| if (arraySize != 0) { |
| liveObjects.add(new byte[arraySize]); |
| usedMemory += arraySize; |
| } |
| } |
| }, |
| |
| // Simple deallocation |
| () -> { |
| if (liveObjects.size() != 0) { |
| int elementNum = RND.nextInt(liveObjects.size()); |
| int shouldFree = liveObjects.get(elementNum).length; |
| liveObjects.remove(elementNum); |
| usedMemory -= shouldFree; |
| } |
| }, |
| |
| // Dead object allocation |
| () -> { |
| int size = RND.nextInt(DEAD_OBJECT_MAX_SIZE); |
| blackHole(new byte[size]); |
| } |
| }; |
| |
| @Override |
| public void run() { |
| while (!shouldStop) { |
| actions[RND.nextInt(actions.length)].run(); |
| Thread.yield(); |
| } |
| |
| System.out.println("Memory Stresser finished"); |
| } |
| } |
| |
| class LogLevelSwitcher implements Runnable { |
| |
| public static volatile boolean shouldStop = false; |
| private final int logCount; // how many various log files will be used |
| private final String logFilePrefix; // name of log file will be logFilePrefix + index |
| private final Random RND = Utils.getRandomInstance(); |
| private final MBeanServer MBS = ManagementFactory.getPlatformMBeanServer(); |
| |
| /** |
| * @param logFilePrefix prefix for log files |
| * @param logCount amount of log files |
| */ |
| public LogLevelSwitcher(String logFilePrefix, int logCount) { |
| this.logCount = logCount; |
| this.logFilePrefix = logFilePrefix; |
| |
| } |
| |
| private static final String[] LOG_LEVELS = {"error", "warning", "info", "debug", "trace"}; |
| |
| @Override |
| public void run() { |
| |
| while (!shouldStop) { |
| int fileNum = RND.nextInt(logCount); |
| int logLevel = RND.nextInt(LOG_LEVELS.length); |
| |
| String outputCommand = String.format("output=%s_%d.log", logFilePrefix, fileNum); |
| String logLevelCommand = "what='gc*=" + LOG_LEVELS[logLevel] + "'"; |
| |
| try { |
| Object out = MBS.invoke(new ObjectName("com.sun.management:type=DiagnosticCommand"), |
| "vmLog", |
| new Object[]{new String[]{outputCommand, logLevelCommand}}, |
| new String[]{String[].class.getName()}); |
| |
| if (!out.toString().isEmpty()) { |
| System.out.format("WARNING: Diagnostic command vmLog with arguments %s,%s returned not empty" |
| + " output %s\n", |
| outputCommand, logLevelCommand, out); |
| } |
| } catch (InstanceNotFoundException | MBeanException | ReflectionException | MalformedObjectNameException e) { |
| System.out.println("Got exception trying to change log level:" + e); |
| e.printStackTrace(); |
| throw new Error(e); |
| } |
| Thread.yield(); |
| } |
| System.out.println("Log Switcher finished"); |
| } |
| } |
| |
| |
| public class TestUnifiedLoggingSwitchStress { |
| /** |
| * Count of memory stressing threads |
| */ |
| private static final int MEMORY_STRESSERS_COUNT = 3; |
| /** |
| * Count of log switching threads |
| */ |
| private static final int LOG_LEVEL_SWITCHERS_COUNT = 2; |
| /** |
| * Count of log files created by each log switching thread |
| */ |
| private static final int LOG_FILES_COUNT = 2; |
| /** |
| * Maximum amount memory allocated by each stressing thread |
| */ |
| private static final int MAX_MEMORY_PER_STRESSER = (int) (Runtime.getRuntime().freeMemory() |
| / MEMORY_STRESSERS_COUNT * 0.7); |
| |
| public static void main(String[] args) throws InterruptedException { |
| if (args.length != 1) { |
| throw new Error("Test Bug: Expected duration (in seconds) wasn't provided as command line argument"); |
| } |
| long duration = Integer.parseInt(args[0]) * 1000; |
| |
| long startTime = System.currentTimeMillis(); |
| |
| List<Thread> threads = new LinkedList<>(); |
| |
| for (int i = 0; i < LOG_LEVEL_SWITCHERS_COUNT; i++) { |
| threads.add(new Thread(new LogLevelSwitcher("Output_" + i, LOG_FILES_COUNT))); |
| } |
| |
| for (int i = 0; i < MEMORY_STRESSERS_COUNT; i++) { |
| threads.add(new Thread(new MemoryStresser(MAX_MEMORY_PER_STRESSER))); |
| } |
| |
| threads.stream().forEach(Thread::start); |
| |
| while (System.currentTimeMillis() - startTime < duration) { |
| Thread.yield(); |
| } |
| |
| MemoryStresser.shouldStop = true; |
| LogLevelSwitcher.shouldStop = true; |
| } |
| } |