| /* |
| * 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.lucene.store; |
| |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.lucene.store.RateLimiter.SimpleRateLimiter; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.apache.lucene.util.TestUtil; |
| import org.apache.lucene.util.ThreadInterruptedException; |
| |
| /** |
| * Simple testcase for RateLimiter.SimpleRateLimiter |
| */ |
| public final class TestRateLimiter extends LuceneTestCase { |
| |
| // LUCENE-6075 |
| public void testOverflowInt() throws Exception { |
| Thread t = new Thread() { |
| @Override |
| public void run() { |
| expectThrows(ThreadInterruptedException.class, () -> { |
| new SimpleRateLimiter(1).pause((long) (1.5*Integer.MAX_VALUE*1024*1024/1000)); |
| }); |
| } |
| }; |
| t.start(); |
| Thread.sleep(10); |
| t.interrupt(); |
| } |
| |
| public void testThreads() throws Exception { |
| |
| double targetMBPerSec = 10.0 + 20 * random().nextDouble(); |
| final SimpleRateLimiter limiter = new SimpleRateLimiter(targetMBPerSec); |
| |
| final CountDownLatch startingGun = new CountDownLatch(1); |
| |
| Thread[] threads = new Thread[TestUtil.nextInt(random(), 3, 6)]; |
| final AtomicLong totBytes = new AtomicLong(); |
| for(int i=0;i<threads.length;i++) { |
| threads[i] = new Thread() { |
| @Override |
| public void run() { |
| try { |
| startingGun.await(); |
| } catch (InterruptedException ie) { |
| throw new ThreadInterruptedException(ie); |
| } |
| long bytesSinceLastPause = 0; |
| for(int i=0;i<500;i++) { |
| long numBytes = TestUtil.nextInt(random(), 1000, 10000); |
| totBytes.addAndGet(numBytes); |
| bytesSinceLastPause += numBytes; |
| if (bytesSinceLastPause > limiter.getMinPauseCheckBytes()) { |
| limiter.pause(bytesSinceLastPause); |
| bytesSinceLastPause = 0; |
| } |
| } |
| } |
| }; |
| threads[i].start(); |
| } |
| |
| long startNS = System.nanoTime(); |
| startingGun.countDown(); |
| for(Thread thread : threads) { |
| thread.join(); |
| } |
| long endNS = System.nanoTime(); |
| double actualMBPerSec = (totBytes.get()/1024/1024.)/((endNS-startNS)/1000000000.0); |
| |
| // TODO: this may false trip .... could be we can only assert that it never exceeds the max, so slow jenkins doesn't trip: |
| double ratio = actualMBPerSec/targetMBPerSec; |
| |
| // Only enforce that it wasn't too fast; if machine is bogged down (can't schedule threads / sleep properly) then it may falsely be too slow: |
| assumeTrue("actualMBPerSec=" + actualMBPerSec + " targetMBPerSec=" + targetMBPerSec, 0.9 <= ratio); |
| assertTrue("targetMBPerSec=" + targetMBPerSec + " actualMBPerSec=" + actualMBPerSec, ratio <= 1.1); |
| } |
| } |