| // Copyright (C) 2017 The Android Open Source Project |
| // |
| // Licensed 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 com.googlesource.gerrit.plugins.events.fsstore; |
| |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import junit.framework.TestCase; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class FsSequenceTest extends TestCase { |
| private static String dir = "events-FsSequence"; |
| private static Path base; |
| private Path myBase; |
| private FsSequence seq; |
| private long count = 1000; |
| private long maxSpins = 1; |
| private String incrementMarker = ""; |
| |
| @Override |
| @Before |
| public void setUp() throws Exception { |
| myBase = base; |
| if (myBase == null) { |
| myBase = Files.createTempDirectory(dir); |
| } |
| seq = new FsSequence(myBase); |
| seq.initFs((long) 0); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| Fs.tryRecursiveDelete(myBase); |
| } |
| |
| @Test |
| public void testGetZero() throws IOException { |
| assertEquals((long) 0, (long) seq.get()); |
| } |
| |
| @Test |
| public void testIncrement() throws IOException { |
| Long next = seq.get() + (long) 1; |
| assertEquals(next, seq.increment()); |
| } |
| |
| @Test |
| public void testSpinIncrement() throws IOException { |
| long next = seq.get() + (long) 1; |
| assertEquals(next, seq.spinIncrement(1)); |
| } |
| |
| @Test |
| public void testCount() throws Exception { |
| long previous = -1; |
| for (long i = 0; i < count; i++) { |
| Long v = seq.spinIncrement(maxSpins); |
| if (v != null) { |
| long val = v; |
| if (val <= previous) { |
| throw new Exception("val(" + val + ") <= previous(" + previous + ")"); |
| } |
| } |
| System.out.print(incrementMarker); |
| } |
| long average = seq.totalSpins / seq.totalUpdates; |
| System.out.println("Average update submission spins: " + average); |
| } |
| |
| /** |
| * First, make the junit jar easily available |
| * |
| * <p>ln -s ~/.m2/repository/junit/junit/4.8.1/junit-4.8.1.jar target |
| * |
| * <p>To run type: |
| * |
| * <p>java -cp target/classes:target/test-classes:target/junit-4.8.1.jar \ |
| * com.googlesource.gerrit.plugins.events.fsstore.FsSequenceTest \ [dir [count [spin_retries]]] |
| * |
| * <p>Note: if you do not specify <dir>, it will create a directory under /tmp |
| * |
| * <p>NFS, 1 worker, count=1000, retries=1000 ~30s ~30ms/event avgspins 0 NFS, 2 workers, |
| * count=1000, retries=1000 ~37s ~18ms/event avgspins 0 NFS, 3 workers, count=1000, retries=1000 |
| * ~50s ~17ms/event avgspins 18 NFS, 4 workers, count=1000, retries=1000 ~1m25 ~21ms/event |
| * avgspins 26 scales best with 2 workers! |
| * |
| * <p>NFS(WAN), 1 worker, count=10, retries=1000 19s ~2s/event avgspins 0 NFS(WAN), 2 workers, |
| * count=10, retries=1000 23s ~1s/event avgspins 1 NFS(WAN), 3 workers, count=10, retries=1000 38s |
| * ~1.3s/event avgspins 12 |
| * |
| * <p>Our main production server does 220K/week ~22/min events ~ <3s/event |
| */ |
| public static void main(String[] argv) throws Exception { |
| if (argv.length > 0) { |
| base = Paths.get(argv[0]); |
| } |
| FsSequenceTest t = new FsSequenceTest(); |
| if (argv.length > 1) { |
| t.count = Long.parseLong(argv[1]); |
| } |
| if (argv.length > 2) { |
| t.maxSpins = Long.parseLong(argv[2]); |
| } |
| |
| t.incrementMarker = "."; |
| t.setUp(); |
| t.testCount(); |
| } |
| } |