| /* |
| * 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.drill.exec; |
| |
| import io.netty.buffer.DrillBuf; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.drill.common.config.DrillConfig; |
| import org.apache.drill.exec.memory.BufferAllocator; |
| import org.apache.drill.exec.memory.RootAllocatorFactory; |
| |
| import org.apache.drill.shaded.guava.com.google.common.collect.Lists; |
| |
| public class TestMemoryRetention { |
| private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TestMemoryRetention.class); |
| |
| private static final int SMALL_AVERAGE_BYTES = 1024 * 32; |
| private static final int LARGE_BYTES = 32 * 1024 * 1024; |
| private static final int PARALLEL_THREADS = 32; |
| private static final double SMALL_ALLOCATION_MEM = 0.20; |
| private static final double OVERHEAD_ALLOWANCE = 0.20; |
| private static final List<Integer> ALLOCATIONS; |
| private static final int MAX_ALLOCS = 100; |
| private static final AtomicInteger ALLOCS = new AtomicInteger(0); |
| |
| static { |
| final Random r = new Random(); |
| final long maxMemory = DrillConfig.getMaxDirectMemory(); |
| final long maxPerThread = maxMemory / PARALLEL_THREADS; |
| final double smallCount = (maxPerThread * SMALL_ALLOCATION_MEM) / SMALL_AVERAGE_BYTES; |
| final double largeCount = (maxPerThread * (1 - SMALL_ALLOCATION_MEM - OVERHEAD_ALLOWANCE)) / LARGE_BYTES; |
| final List<Integer> allocations = Lists.newArrayList(); |
| |
| for (int i = 0; i < smallCount; i++) { |
| allocations.add(SMALL_AVERAGE_BYTES / 2 + r.nextInt(SMALL_AVERAGE_BYTES)); |
| } |
| |
| for (int i = 0; i < largeCount; i++) { |
| allocations.add(LARGE_BYTES); |
| } |
| Collections.shuffle(allocations); |
| ALLOCATIONS = allocations; |
| } |
| |
| public static void main(String[] args) throws Exception { |
| |
| final DrillConfig config = DrillConfig.create(); |
| final BufferAllocator a = RootAllocatorFactory.newRoot(config); |
| for (int i = 0; i < PARALLEL_THREADS; i++) { |
| Alloc alloc = new Alloc(a); |
| alloc.start(); |
| } |
| } |
| |
| private static class Alloc extends Thread { |
| final BufferAllocator allocator; |
| |
| Alloc(BufferAllocator allocator) { |
| this.allocator = allocator; |
| } |
| |
| @Override |
| public void run() { |
| final Random r = new Random(); |
| try { |
| |
| if (ALLOCS.incrementAndGet() > MAX_ALLOCS) { |
| Thread.sleep(50000000000L); |
| } |
| |
| Thread.sleep(r.nextInt(8000)); |
| } catch (InterruptedException e) { |
| return; |
| } |
| |
| logger.info("Starting alloc."); |
| final List<DrillBuf> bufs = Lists.newLinkedList(); |
| for (final Integer i : ALLOCATIONS) { |
| bufs.add(allocator.buffer(i)); |
| } |
| Collections.shuffle(bufs); |
| logger.info("Finished alloc."); |
| |
| final Dealloc d = new Dealloc(bufs, allocator); |
| |
| // sometimes we'll deallocate locally, sometimes in different thread. |
| if (r.nextBoolean()) { |
| d.start(); |
| } else { |
| d.run(); |
| } |
| } |
| } |
| |
| private static class Dealloc extends Thread { |
| final List<DrillBuf> bufs; |
| final BufferAllocator a; |
| |
| public Dealloc(List<DrillBuf> bufs, BufferAllocator a) { |
| this.bufs = bufs; |
| this.a = a; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| Thread.sleep(8000); |
| logger.info("Starting release."); |
| for (final DrillBuf buf : bufs) { |
| buf.release(); |
| } |
| logger.info("Finished release."); |
| |
| } catch (InterruptedException e) { |
| return; |
| } |
| |
| // start another. |
| Alloc alloc = new Alloc(a); |
| alloc.start(); |
| } |
| } |
| } |