Author: markt
Date: Tue Nov 16 16:46:50 2010
New Revision: 1035688
URL: http://svn.apache.org/viewvc?rev=1035688&view=rev
Log:
Add some benchmark code for session creation.
A performance presentation at JavaOne 2010 highlighted Tomcat's session
creation as a synchronisation bottleneck for multiple production apps
Some optimisations will follow.
Added:
tomcat/trunk/test/org/apache/catalina/session/
tomcat/trunk/test/org/apache/catalina/session/Benchmarks.java (with props)
Added: tomcat/trunk/test/org/apache/catalina/session/Benchmarks.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/test/org/apache/catalina/session/Benchmarks.java?rev=1035688&view=auto
==============================================================================
--- tomcat/trunk/test/org/apache/catalina/session/Benchmarks.java (added)
+++ tomcat/trunk/test/org/apache/catalina/session/Benchmarks.java Tue Nov 16
16:46:50 2010
@@ -0,0 +1,179 @@
+/*
+ * 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 dev box
+ * 1 thread - ~1,500ms
+ * 2 threads - ~3,700ms
+ * 4 threads - ~8,100ms
+ * 16 threads - ~32,500ms
+ */
+ public void testManagerBaseGenerateSessionId() {
+ doTestManagerBaseGenerateSessionId(1, 100000);
+ doTestManagerBaseGenerateSessionId(1, 100000);
+ doTestManagerBaseGenerateSessionId(1, 100000);
+ doTestManagerBaseGenerateSessionId(2, 100000);
+ doTestManagerBaseGenerateSessionId(2, 100000);
+ doTestManagerBaseGenerateSessionId(2, 100000);
+ doTestManagerBaseGenerateSessionId(4, 100000);
+ doTestManagerBaseGenerateSessionId(4, 100000);
+ doTestManagerBaseGenerateSessionId(4, 100000);
+ doTestManagerBaseGenerateSessionId(16, 100000);
+ }
+
+
+ public void doTestManagerBaseGenerateSessionId(int threadCount,
+ int iterCount) {
+
+ // Create a default session manager
+ StandardManager mgr = new StandardManager();
+
+ 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);
+ 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 dev box
+ * 1 thread - 2,422ms
+ * 2 threads - 5,047ms
+ * 4 threads - 13,188ms
+ * 16 threads - 54,422ms
+ */
+ public void testManagerBaseCreateSession() {
+ doTestManagerBaseCreateSession(1, 100000);
+ doTestManagerBaseCreateSession(2, 100000);
+ doTestManagerBaseCreateSession(4, 100000);
+ doTestManagerBaseCreateSession(16, 100000);
+ }
+
+
+ public void doTestManagerBaseCreateSession(int threadCount, int iterCount)
{
+
+ // Create a default session manager
+ StandardManager mgr = new StandardManager();
+ mgr.setContainer(new StandardContext());
+
+ 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);
+ 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();
+ }
+ }
+ }
+}
Propchange: tomcat/trunk/test/org/apache/catalina/session/Benchmarks.java
------------------------------------------------------------------------------
svn:eol-style = native
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org
For additional commands, e-mail: dev-h...@tomcat.apache.org
