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361
test/org/apache/catalina/session/Benchmarks.java
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361
test/org/apache/catalina/session/Benchmarks.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.session;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.security.SecureRandom;
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import org.junit.Assert;
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import org.junit.Test;
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import org.apache.catalina.Context;
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import org.apache.catalina.Host;
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import org.apache.catalina.LifecycleException;
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import org.apache.catalina.Session;
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import org.apache.catalina.core.StandardContext;
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import org.apache.catalina.core.StandardHost;
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/**
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* Named Benchmarks so it is not automatically executed as part of the unit
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* tests.
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*/
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public class Benchmarks {
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/*
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* Results on markt's 4-core Windows dev box
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* 1 thread - ~1,400ms
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* 2 threads - ~2,100ms
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* 4 threads - ~3,100ms
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* 16 threads - ~14,700ms
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*
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* Results on markt's 2-core OSX dev box
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* 1 thread - ~1,400ms
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* 2 threads - ~1,700ms
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* 4 threads - ~3,500ms
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* 16 threads - ~14,465ms
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*/
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@Test
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public void testManagerBaseGenerateSessionId() throws Exception {
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doTestManagerBaseGenerateSessionId(1, 1000000);
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doTestManagerBaseGenerateSessionId(1, 1000000);
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doTestManagerBaseGenerateSessionId(1, 1000000);
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doTestManagerBaseGenerateSessionId(2, 1000000);
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doTestManagerBaseGenerateSessionId(2, 1000000);
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doTestManagerBaseGenerateSessionId(2, 1000000);
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doTestManagerBaseGenerateSessionId(4, 1000000);
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doTestManagerBaseGenerateSessionId(4, 1000000);
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doTestManagerBaseGenerateSessionId(4, 1000000);
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doTestManagerBaseGenerateSessionId(16, 1000000);
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// Reduce iterations as context switching will slow things down
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doTestManagerBaseGenerateSessionId(100, 100000);
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doTestManagerBaseGenerateSessionId(400, 10000);
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}
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private void doTestManagerBaseGenerateSessionId(int threadCount,
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int iterCount) throws Exception {
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// Create a default session manager
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StandardManager mgr = new StandardManager();
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try {
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mgr.startInternal();
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} catch (LifecycleException e) {
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// Ignore - this is expected
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}
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mgr.generateSessionId();
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while (mgr.sessionCreationTiming.size() <
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ManagerBase.TIMING_STATS_CACHE_SIZE) {
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mgr.sessionCreationTiming.add(null);
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}
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while (mgr.sessionExpirationTiming.size() <
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ManagerBase.TIMING_STATS_CACHE_SIZE) {
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mgr.sessionExpirationTiming.add(null);
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}
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Thread[] threads = new Thread[threadCount];
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for (int i = 0; i < threadCount; i++) {
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threads[i] = new Thread(
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new TestThreadGenerateSessionId(mgr, iterCount));
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}
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long start = System.currentTimeMillis();
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for (int i = 0; i < threadCount; i++) {
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threads[i].start();
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}
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for (int i = 0; i < threadCount; i++) {
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try {
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threads[i].join();
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} catch (InterruptedException e) {
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e.printStackTrace();
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Assert.fail(e.getMessage());
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}
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}
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long end = System.currentTimeMillis();
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StringBuilder result = new StringBuilder();
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result.append("Threads: ");
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result.append(threadCount);
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result.append(", Time(ms): ");
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result.append(end-start);
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System.out.println(result.toString());
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}
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private static final class TestThreadGenerateSessionId implements Runnable {
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private ManagerBase mgr;
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private int count;
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public TestThreadGenerateSessionId(ManagerBase mgr, int count) {
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this.mgr = mgr;
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this.count = count;
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}
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@Override
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public void run() {
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for (int i = 0; i < count; i++) {
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mgr.generateSessionId();
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}
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}
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}
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/*
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* Results on markt's 4-core Windows dev box
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* 1 thread - ~3,800ms
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* 2 threads - ~6,700ms
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* 4 threads - ~11,000ms
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* 16 threads - ~43,500ms
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*
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* Results on markt's 2-core OSX dev box
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* 1 thread - ~4,100ms
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* 2 threads - ~5,700ms
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* 4 threads - ~11,700ms
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* 16 threads - ~45,600ms
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*/
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@Test
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public void testManagerBaseCreateSession() throws LifecycleException {
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doTestManagerBaseCreateSession(1, 100000);
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doTestManagerBaseCreateSession(2, 1000000);
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doTestManagerBaseCreateSession(4, 1000000);
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doTestManagerBaseCreateSession(16, 1000000);
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// Reduce iterations as context switching will slow things down
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doTestManagerBaseCreateSession(100, 100000);
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doTestManagerBaseCreateSession(400, 10000);
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}
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private void doTestManagerBaseCreateSession(int threadCount,
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int iterCount) throws LifecycleException {
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// Create a default session manager
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StandardManager mgr = new StandardManager();
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mgr.setPathname(null);
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Host host = new StandardHost();
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host.setName("unittest");
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Context context = new StandardContext();
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context.setPath("");
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context.setParent(host);
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mgr.setContext(context);
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mgr.start();
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mgr.generateSessionId();
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while (mgr.sessionCreationTiming.size() <
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ManagerBase.TIMING_STATS_CACHE_SIZE) {
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mgr.sessionCreationTiming.add(null);
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}
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while (mgr.sessionExpirationTiming.size() <
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ManagerBase.TIMING_STATS_CACHE_SIZE) {
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mgr.sessionExpirationTiming.add(null);
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}
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Thread[] threads = new Thread[threadCount];
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for (int i = 0; i < threadCount; i++) {
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threads[i] = new Thread(
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new TestThreadCreateSession(mgr, iterCount));
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}
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long start = System.currentTimeMillis();
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for (int i = 0; i < threadCount; i++) {
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threads[i].start();
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}
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for (int i = 0; i < threadCount; i++) {
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try {
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threads[i].join();
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} catch (InterruptedException e) {
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e.printStackTrace();
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Assert.fail(e.getMessage());
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}
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}
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long end = System.currentTimeMillis();
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StringBuilder result = new StringBuilder();
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result.append("Threads: ");
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result.append(threadCount);
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result.append(", Time(ms): ");
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result.append(end-start);
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System.out.println(result.toString());
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}
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private static final class TestThreadCreateSession implements Runnable {
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private ManagerBase mgr;
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private int count;
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public TestThreadCreateSession(ManagerBase mgr, int count) {
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this.mgr = mgr;
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this.count = count;
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}
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@Override
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public void run() {
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for (int i = 0; i < count; i++) {
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Session session = mgr.createSession(mgr.generateSessionId());
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session.expire();
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}
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}
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}
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/*
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* SecureRandom vs. reading /dev/urandom. Very different performance noted
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* on some platforms.
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*
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* Results on markt's 4-core Windows dev box
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* SecureRandom /dev/urandom
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* 1 thread - ~766ms N/A
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* 2 threads - ~843ms N/A
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* 4 threads - ~766ms N/A
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*
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* Results on markt's 2-core OSX dev box
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* SecureRandom /dev/urandom
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* 1 thread - ~759ms ~3,500ms
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* 2 threads - ~725ms ~5,200ms
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* 4 threads - ~1,265ms ~10,500ms
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*/
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@Test
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public void testSecureRandomVsDevURandom() throws Exception {
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doTestSecureRandomVsDevURandom(1, 1000000);
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doTestSecureRandomVsDevURandom(2, 1000000);
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doTestSecureRandomVsDevURandom(4, 1000000);
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}
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private void doTestSecureRandomVsDevURandom(int threadCount, int iterCount)
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throws Exception {
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doTestSecureRandomVsDevURandomInner(threadCount, iterCount, true);
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doTestSecureRandomVsDevURandomInner(threadCount, iterCount, false);
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}
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private void doTestSecureRandomVsDevURandomInner(int threadCount,
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int iterCount, boolean useSecureRandom) throws Exception {
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Thread[] threads = new Thread[threadCount];
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for (int i = 0; i < threadCount; i++) {
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if (useSecureRandom) {
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threads[i] = new Thread(new TestThreadSecureRandom(iterCount));
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} else {
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threads[i] = new Thread(new TestThreadDevUrandom(iterCount));
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}
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}
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long start = System.currentTimeMillis();
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for (int i = 0; i < threadCount; i++) {
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threads[i].start();
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}
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for (int i = 0; i < threadCount; i++) {
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try {
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threads[i].join();
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} catch (InterruptedException e) {
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e.printStackTrace();
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Assert.fail(e.getMessage());
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}
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}
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long end = System.currentTimeMillis();
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StringBuilder result = new StringBuilder();
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if (useSecureRandom) {
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result.append("SecureRandom ");
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} else {
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result.append("/dev/urandom ");
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}
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result.append("Threads: ");
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result.append(threadCount);
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result.append(", Time(ms): ");
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result.append(end-start);
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System.out.println(result.toString());
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}
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private static final class TestThreadSecureRandom implements Runnable {
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private SecureRandom secureRandom;
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private byte[] bytes = new byte[16];
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private int count;
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TestThreadSecureRandom(int iterCount) throws Exception {
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this.count = iterCount;
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this.secureRandom = SecureRandom.getInstance("SHA1PRNG");
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}
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@Override
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public void run() {
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for (int i = 0; i < count; i++) {
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secureRandom.nextBytes(bytes);
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}
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}
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}
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private static final class TestThreadDevUrandom implements Runnable {
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private InputStream is;
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private byte[] bytes = new byte[16];
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private int count;
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TestThreadDevUrandom(int iterCount) {
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try {
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is = new FileInputStream("/dev/urandom");
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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}
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this.count = iterCount;
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}
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@Override
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public void run() {
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try {
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int read = 0;
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for (int i = 0; i < count; i++) {
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read = is.read(bytes);
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if (read < bytes.length) {
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throw new IOException("Only read " + read + " bytes");
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}
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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Reference in New Issue
Block a user