| /* |
| * Copyright (c) 2015, 2018, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 jdk.jfr.event.gc.detailed; |
| |
| import static jdk.test.lib.Asserts.assertEquals; |
| import static jdk.test.lib.Asserts.assertNotEquals; |
| import static jdk.test.lib.Asserts.assertTrue; |
| |
| import java.util.List; |
| import java.util.Random; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.TimeUnit; |
| |
| import jdk.jfr.Recording; |
| import jdk.jfr.consumer.RecordedEvent; |
| import jdk.jfr.consumer.RecordedFrame; |
| import jdk.jfr.consumer.RecordedStackTrace; |
| import jdk.jfr.consumer.RecordedThread; |
| import jdk.test.lib.jfr.EventNames; |
| import jdk.test.lib.jfr.Events; |
| |
| /** |
| * Starts several threads which allocate a lot of objects that remain in young |
| * and old generations with defined ratio. Expects event |
| * vm/gc/detailed/allocation_requiring_gc recorded. |
| */ |
| public class StressAllocationGCEvents { |
| |
| private Semaphore threadsCompleted; |
| |
| public void run(String[] args) throws Exception { |
| threadsCompleted = new Semaphore(0); |
| System.out.println("Total memory= " + Runtime.getRuntime().maxMemory() + " bytes"); |
| |
| int obj_size = DEFAULT_OBJ_SIZE; |
| if (args.length > 0) { |
| obj_size = Integer.parseInt(args[0]); |
| } |
| |
| System.out.println("Objects size= " + obj_size + " bytes"); |
| ExecutorService executor |
| = Executors.newFixedThreadPool(THREAD_COUNT, new NamedThreadFactory()); |
| Recording r = new Recording(); |
| r.enable(EVENT_NAME_ALLOCATION_REQUIRING_GC); |
| r.start(); |
| |
| System.out.println("Starting " + THREAD_COUNT + " threads"); |
| |
| for (int i = 0; i < THREAD_COUNT; i++) { |
| executor.execute(new Runner(obj_size)); |
| } |
| |
| // Wait for all threads to complete |
| threadsCompleted.acquire(THREAD_COUNT); |
| executor.shutdownNow(); |
| |
| if (!executor.awaitTermination(10, TimeUnit.SECONDS)) { |
| System.err.println("Thread pool did not terminate after 10 seconds after shutdown"); |
| } |
| |
| r.stop(); |
| |
| List<RecordedEvent> allocationEvents |
| = Events.fromRecording(r); |
| |
| System.out.println(EVENT_NAME_ALLOCATION_REQUIRING_GC + " " + allocationEvents.size()); |
| |
| Events.hasEvents(allocationEvents); |
| |
| // check stacktrace depth |
| for (RecordedEvent event : allocationEvents) { |
| checkEvent(event); |
| } |
| } |
| |
| class Runner extends Thread { |
| |
| public Runner(int obj_size) { |
| this.startTime = System.currentTimeMillis(); |
| this.OBJ_SIZE = obj_size; |
| this.OLD_OBJ_COUNT = Math.max(1, (int) ((float) Runtime.getRuntime().maxMemory() / 2 / THREAD_COUNT / OBJ_SIZE)); |
| this.old_garbage = new Object[OLD_OBJ_COUNT]; |
| |
| System.out.println(String.format("In \"%s\" old objects count = %d, recursion depth = %d", |
| this.getName(), OLD_OBJ_COUNT, RECURSION_DEPTH)); |
| } |
| |
| @Override |
| public void run() { |
| diver(RECURSION_DEPTH); |
| threadsCompleted.release(); |
| System.out.println("Completed after " + (System.currentTimeMillis() - startTime) + " ms"); |
| } |
| |
| private void diver(int stack) { |
| if (stack > 1) { |
| diver(stack - 1); |
| } else { |
| long endTime = startTime + (SECONDS_TO_RUN * 1000); |
| Random r = new Random(startTime); |
| while (endTime > System.currentTimeMillis()) { |
| byte[] garbage = new byte[OBJ_SIZE]; |
| if (r.nextInt(100) > OLD_GEN_RATE) { |
| old_garbage[r.nextInt(OLD_OBJ_COUNT)] = garbage; |
| } |
| } |
| } |
| } |
| |
| private final long startTime; |
| private final Object[] old_garbage; |
| private final int OBJ_SIZE; |
| private final int OLD_OBJ_COUNT; |
| } |
| |
| ///< check stacktrace depth |
| private void checkEvent(RecordedEvent event) throws Exception { |
| // skip check if allocation failure comes not from diver |
| |
| RecordedThread thread = event.getThread(); |
| String threadName = thread.getJavaName(); |
| |
| if (!threadName.contains(THREAD_NAME)) { |
| System.out.println("Skip event not from pool (from internals)"); |
| System.out.println(" Thread Id: " + thread.getJavaThreadId() |
| + " Thread name: " + threadName); |
| return; |
| } |
| |
| RecordedStackTrace stackTrace = event.getStackTrace(); |
| |
| List<RecordedFrame> frames = stackTrace.getFrames(); |
| //String[] stacktrace = StackTraceHelper.buildStackTraceFromFrames(frames); |
| |
| if (!(frames.get(0).getMethod().getName().equals(DIVER_FRAME_NAME))) { |
| System.out.println("Skip stacktrace check for: \n" |
| + String.join("\n", threadName)); |
| return; |
| } |
| |
| assertTrue(frames.size() > RECURSION_DEPTH, |
| "Stack trace should contain at least one more entry than the ones generated by the test recursion"); |
| for (int i = 0; i < RECURSION_DEPTH; i++) { |
| assertEquals(frames.get(i).getMethod().getName(), DIVER_FRAME_NAME, |
| "Frame " + i + " is wrong: \n" |
| + String.join("\n", threadName)); |
| } |
| assertNotEquals(frames.get(RECURSION_DEPTH).getMethod().getName(), DIVER_FRAME_NAME, |
| "Too many diver frames: \n" |
| + String.join("\n", threadName)); |
| } |
| |
| class NamedThreadFactory implements ThreadFactory { |
| |
| private int threadNum = 0; |
| |
| @Override |
| public Thread newThread(Runnable r) { |
| return new Thread(r, THREAD_NAME + (threadNum++)); |
| } |
| } |
| |
| // Because each thread will keep some number of objects live we need to limit |
| // the number of threads to ensure we don't run out of heap space. The big |
| // allocation tests uses 256m heap and 1m allocations, so a 64 thread limit |
| // should be fine. |
| private final static int THREAD_COUNT_LIMIT = 64; |
| private final static int THREAD_COUNT = Math.min(1 + (int) (Runtime.getRuntime().availableProcessors() * 2), THREAD_COUNT_LIMIT); |
| private final static int SECONDS_TO_RUN = 60; |
| private final static int DEFAULT_OBJ_SIZE = 1024; |
| private final static int OLD_GEN_RATE = 60; // from 0 to 100 |
| private final static int RECURSION_DEPTH = 5; |
| private final static String EVENT_NAME_ALLOCATION_REQUIRING_GC = EventNames.AllocationRequiringGC; |
| private static final String THREAD_NAME = "JFRTest-"; |
| private static final String DIVER_FRAME_NAME = "StressAllocationGCEvents$Runner.diver"; |
| } |