| /* |
| * 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.geode.internal.cache.eviction; |
| |
| import org.apache.geode.distributed.internal.DistributionConfig; |
| import org.apache.geode.internal.cache.InternalCache; |
| import org.apache.geode.internal.cache.LocalRegion; |
| import org.apache.geode.internal.cache.PartitionedRegion; |
| import org.apache.geode.internal.cache.control.InternalResourceManager.ResourceType; |
| import org.apache.geode.internal.offheap.MemoryAllocator; |
| import org.apache.geode.internal.statistics.StatisticsClock; |
| |
| /** |
| * Triggers centralized eviction(asynchronously) when the ResourceManager sends an eviction event |
| * for off-heap regions. This is registered with the ResourceManager. |
| * |
| * @since Geode 1.0 |
| */ |
| public class OffHeapEvictor extends HeapEvictor { |
| |
| private static final String EVICTOR_THREAD_NAME = "OffHeapEvictorThread"; |
| |
| private long bytesToEvictWithEachBurst; |
| |
| public OffHeapEvictor(final InternalCache cache, StatisticsClock statisticsClock) { |
| super(cache, EVICTOR_THREAD_NAME, statisticsClock); |
| calculateEvictionBurst(); |
| } |
| |
| private void calculateEvictionBurst() { |
| MemoryAllocator allocator = cache().getOffHeapStore(); |
| |
| /* |
| * Bail if there is no off-heap memory to evict. |
| */ |
| if (null == allocator) { |
| throw new IllegalStateException( |
| "Cannot initialize the off-heap evictor. There is no off-heap memory available for eviction."); |
| } |
| |
| float evictionBurstPercentage = Float.parseFloat(System.getProperty( |
| DistributionConfig.GEMFIRE_PREFIX + "HeapLRUCapacityController.evictionBurstPercentage", |
| "0.4")); |
| bytesToEvictWithEachBurst = |
| (long) (allocator.getTotalMemory() * 0.01 * evictionBurstPercentage); |
| } |
| |
| @Override |
| protected int getEvictionLoopDelayTime() { |
| if (numEvictionLoopsCompleted() < Math.max(3, numFastLoops())) { |
| return 250; |
| } |
| |
| return 1000; |
| } |
| |
| @Override |
| protected boolean includePartitionedRegion(PartitionedRegion region) { |
| return region.getEvictionAttributes().getAlgorithm().isLRUHeap() |
| && region.getDataStore() != null && region.getAttributes().getOffHeap(); |
| } |
| |
| @Override |
| protected boolean includeLocalRegion(LocalRegion region) { |
| return region.getEvictionAttributes().getAlgorithm().isLRUHeap() |
| && region.getAttributes().getOffHeap(); |
| } |
| |
| @Override |
| public long getTotalBytesToEvict() { |
| return bytesToEvictWithEachBurst; |
| } |
| |
| @Override |
| protected ResourceType getResourceType() { |
| return ResourceType.OFFHEAP_MEMORY; |
| } |
| } |