| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.cassandra.utils.memory; |
| |
| import java.util.concurrent.*; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import com.google.common.util.concurrent.Uninterruptibles; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.utils.concurrent.OpOrder; |
| |
| public class NativeAllocatorTest |
| { |
| private ScheduledExecutorService exec; |
| private OpOrder order; |
| private OpOrder.Group group; |
| private CountDownLatch canClean; |
| private CountDownLatch isClean; |
| private AtomicReference<NativeAllocator> allocatorRef; |
| private AtomicReference<OpOrder.Barrier> barrier; |
| private NativePool pool; |
| private NativeAllocator allocator; |
| private Runnable markBlocking; |
| |
| @Before |
| public void setUp() |
| { |
| exec = Executors.newScheduledThreadPool(2); |
| order = new OpOrder(); |
| group = order.start(); |
| canClean = new CountDownLatch(1); |
| isClean = new CountDownLatch(1); |
| allocatorRef = new AtomicReference<>(); |
| barrier = new AtomicReference<>(); |
| pool = new NativePool(1, 100, 0.75f, () -> { |
| try |
| { |
| canClean.await(); |
| } |
| catch (InterruptedException e) |
| { |
| throw new AssertionError(); |
| } |
| if (isClean.getCount() > 0) |
| { |
| allocatorRef.get().offHeap().released(80); |
| isClean.countDown(); |
| } |
| return CompletableFuture.completedFuture(true); |
| }); |
| allocator = new NativeAllocator(pool); |
| allocatorRef.set(allocator); |
| markBlocking = () -> { |
| barrier.set(order.newBarrier()); |
| barrier.get().issue(); |
| barrier.get().markBlocking(); |
| }; |
| } |
| |
| private void verifyUsedReclaiming(long used, long reclaiming) |
| { |
| Assert.assertEquals(used, allocator.offHeap().owns()); |
| Assert.assertEquals(used, pool.offHeap.used()); |
| Assert.assertEquals(reclaiming, allocator.offHeap().getReclaiming()); |
| Assert.assertEquals(reclaiming, pool.offHeap.getReclaiming()); |
| } |
| |
| @Test |
| public void testBookKeeping() throws ExecutionException, InterruptedException |
| { |
| final Runnable test = () -> { |
| // allocate normal, check accounted and not cleaned |
| allocator.allocate(10, group); |
| verifyUsedReclaiming(10, 0); |
| |
| // confirm adjustment works |
| allocator.offHeap().adjust(-10, group); |
| verifyUsedReclaiming(0, 0); |
| |
| allocator.offHeap().adjust(10, group); |
| verifyUsedReclaiming(10, 0); |
| |
| // confirm we cannot allocate negative |
| boolean success = false; |
| try |
| { |
| allocator.offHeap().allocate(-10, group); |
| } |
| catch (AssertionError e) |
| { |
| success = true; |
| } |
| |
| Assert.assertTrue(success); |
| Uninterruptibles.sleepUninterruptibly(10L, TimeUnit.MILLISECONDS); |
| Assert.assertEquals(1, isClean.getCount()); |
| |
| // allocate above watermark |
| allocator.allocate(70, group); |
| verifyUsedReclaiming(80, 0); |
| |
| // let the cleaner run, it will release 80 bytes |
| canClean.countDown(); |
| try |
| { |
| Assert.assertTrue(isClean.await(10L, TimeUnit.SECONDS)); |
| } |
| catch (InterruptedException e) |
| { |
| throw new AssertionError(); |
| } |
| Assert.assertEquals(0, isClean.getCount()); |
| verifyUsedReclaiming(0, 0); |
| |
| // allocate, then set discarding, then allocated some more |
| allocator.allocate(30, group); |
| verifyUsedReclaiming(30, 0); |
| allocator.setDiscarding(); |
| Assert.assertFalse(allocator.isLive()); |
| verifyUsedReclaiming(30, 30); |
| allocator.allocate(50, group); |
| verifyUsedReclaiming(80, 80); |
| |
| // allocate above limit, check we block until "marked blocking" |
| exec.schedule(markBlocking, 10L, TimeUnit.MILLISECONDS); |
| allocator.allocate(30, group); |
| Assert.assertNotNull(barrier.get()); |
| verifyUsedReclaiming(110, 110); |
| |
| // release everything |
| allocator.setDiscarded(); |
| Assert.assertFalse(allocator.isLive()); |
| verifyUsedReclaiming(0, 0); |
| }; |
| exec.submit(test).get(); |
| } |
| } |
| |
| |