/*
* 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.catalina.session;
import junit.framework.TestCase;
import org.apache.catalina.Session;
import org.apache.catalina.core.StandardContext;
/**
* Named Benchmarks so it is not automatically executed as part of the unit
* tests.
*/
public class Benchmarks extends TestCase {
/*
* Results on markt's 4-core Windows dev box
* 1 thread - ~2,000ms
* 2 threads - ~3,300ms
* 4 threads - ~4,900ms
* 16 threads - ~21,300ms
*
* Results on markt's 2-core OSX dev box
* 1 thread - ~5,600ms
* 2 threads - ~ 7,300ms
* 4 threads - ~14,400ms
* 16 threads - ~57,559ms
*/
public void testManagerBaseGenerateSessionId() throws Exception {
doTestManagerBaseGenerateSessionId(1, 1000000);
doTestManagerBaseGenerateSessionId(1, 1000000);
doTestManagerBaseGenerateSessionId(1, 1000000);
doTestManagerBaseGenerateSessionId(2, 1000000);
doTestManagerBaseGenerateSessionId(2, 1000000);
doTestManagerBaseGenerateSessionId(2, 1000000);
doTestManagerBaseGenerateSessionId(4, 1000000);
doTestManagerBaseGenerateSessionId(4, 1000000);
doTestManagerBaseGenerateSessionId(4, 1000000);
doTestManagerBaseGenerateSessionId(16, 1000000);
// Reduce iterations as context switching will slow things down
doTestManagerBaseGenerateSessionId(100, 100000);
doTestManagerBaseGenerateSessionId(400, 10000);
}
public void doTestManagerBaseGenerateSessionId(int threadCount,
int iterCount) throws Exception {
// Create a default session manager
StandardManager mgr = new StandardManager();
// Calling start requires a valid container so do the equivalent
mgr.randomFileCurrent = mgr.randomFile;
mgr.createRandomInputStream();
mgr.generateSessionId();
while (mgr.sessionCreationTiming.size() <
ManagerBase.TIMING_STATS_CACHE_SIZE) {
mgr.sessionCreationTiming.add(null);
}
while (mgr.sessionExpirationTiming.size() <
ManagerBase.TIMING_STATS_CACHE_SIZE) {
mgr.sessionExpirationTiming.add(null);
}
Thread[] threads = new Thread[threadCount];
for (int i = 0; i < threadCount; i++) {
threads[i] = new Thread(
new TestThreadGenerateSessionId(mgr, iterCount));
}
long start = System.currentTimeMillis();
for (int i = 0; i < threadCount; i++) {
threads[i].start();
}
for (int i = 0; i < threadCount; i++) {
try {
threads[i].join();
} catch (InterruptedException e) {
e.printStackTrace();
fail(e.getMessage());
}
}
long end = System.currentTimeMillis();
StringBuilder result = new StringBuilder();
result.append("Threads: ");
result.append(threadCount);
result.append(", Time(ms): ");
result.append(end-start);
result.append(", Digests: ");
result.append(mgr.digests.size());
result.append(", Randoms: ");
result.append(mgr.randoms.size());
result.append(", RandomInputStreams: ");
result.append(mgr.randomInputStreams.size());
System.out.println(result.toString());
}
private static final class TestThreadGenerateSessionId implements Runnable {
private ManagerBase mgr;
private int count;
public TestThreadGenerateSessionId(ManagerBase mgr, int count) {
this.mgr = mgr;
this.count = count;
}
@Override
public void run() {
for (int i = 0; i < count; i++) {
mgr.generateSessionId();
}
}
}
/*
* Results on markt's 4-core Windows dev box
* 1 thread - ~4,300ms
* 2 threads - ~7,600ms
* 4 threads - ~11,600ms
* 16 threads - ~49,000ms
*
* Results on markt's 2-core OSX dev box
* 1 thread - ~9,100ms
* 2 threads - ~10,800ms
* 4 threads - ~21,400ms
* 16 threads - ~87,600ms
*/
public void testManagerBaseCreateSession() {
doTestManagerBaseCreateSession(1, 1000000);
doTestManagerBaseCreateSession(2, 1000000);
doTestManagerBaseCreateSession(4, 1000000);
doTestManagerBaseCreateSession(16, 1000000);
// Reduce iterations as context switching will slow things down
doTestManagerBaseCreateSession(100, 100000);
doTestManagerBaseCreateSession(400, 10000);
}
public void doTestManagerBaseCreateSession(int threadCount, int iterCount) {
// Create a default session manager
StandardManager mgr = new StandardManager();
mgr.setContainer(new StandardContext());
// Calling start requires a valid container so do the equivalent
mgr.randomFileCurrent = mgr.randomFile;
mgr.createRandomInputStream();
mgr.generateSessionId();
while (mgr.sessionCreationTiming.size() <
ManagerBase.TIMING_STATS_CACHE_SIZE) {
mgr.sessionCreationTiming.add(null);
}
while (mgr.sessionExpirationTiming.size() <
ManagerBase.TIMING_STATS_CACHE_SIZE) {
mgr.sessionExpirationTiming.add(null);
}
Thread[] threads = new Thread[threadCount];
for (int i = 0; i < threadCount; i++) {
threads[i] = new Thread(
new TestThreadCreateSession(mgr, iterCount));
}
long start = System.currentTimeMillis();
for (int i = 0; i < threadCount; i++) {
threads[i].start();
}
for (int i = 0; i < threadCount; i++) {
try {
threads[i].join();
} catch (InterruptedException e) {
e.printStackTrace();
fail(e.getMessage());
}
}
long end = System.currentTimeMillis();
StringBuilder result = new StringBuilder();
result.append("Threads: ");
result.append(threadCount);
result.append(", Time(ms): ");
result.append(end-start);
result.append(", Digests: ");
result.append(mgr.digests.size());
result.append(", Randoms: ");
result.append(mgr.randoms.size());
result.append(", RandomInputStreams: ");
result.append(mgr.randomInputStreams.size());
System.out.println(result.toString());
}
private static final class TestThreadCreateSession implements Runnable {
private ManagerBase mgr;
private int count;
public TestThreadCreateSession(ManagerBase mgr, int count) {
this.mgr = mgr;
this.count = count;
}
@Override
public void run() {
for (int i = 0; i < count; i++) {
Session session = mgr.createSession(mgr.generateSessionId());
session.expire();
}
}
}
}