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Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services
https://jmeter.apache.org/
Apache License 2.0
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Enhancement: constant-throughput timer #904

Closed asfimport closed 21 years ago

asfimport commented 21 years ago

Jordi Salvat i Alabart (Bug 11523): I'd like to see a timer which waits for an specified amout of time MINUS whatever the previous sample took.

In this way, it is possible to hit a site with (for example) 2 hits per second -- no matter how fast the site responds (as far as it responds in less of .5 secs, of course). There's currently no way to do this (as far as I know).

Version: Nightly OS: All

asfimport commented 21 years ago

Jordi Salvat i Alabart (migrated from Bugzilla): Created attachment ConstantThroughputTimer.java: src/components/org/apache/jmeter/timers/ConstantThroughputTimer.java

ConstantThroughputTimer.java ````java /* * ==================================================================== * The Apache Software License, Version 1.1 * * Copyright (c) 2001 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Apache" and "Apache Software Foundation" and * "Apache JMeter" must not be used to endorse or promote products * derived from this software without prior written permission. For * written permission, please contact apache@apache.org. * * 5. Products derived from this software may not be called "Apache", * "Apache JMeter", nor may "Apache" appear in their name, without * prior written permission of the Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * . */ package org.apache.jmeter.timers; import java.util.*; import java.io.*; import org.apache.jmeter.util.JMeterUtils; import org.apache.jmeter.testelement.AbstractTestElement; /************************************************************ * This class implements a constant throughput timer with its own panel and * fields for value update and user interaction. * *@author Stefano Mazzocchi *@created $Date: 2002/08/11 19:24:41 $ *@version $Revision: 1.1 $ $Date: 2002/08/11 19:24:41 $ ***********************************************************/ public class ConstantThroughputTimer extends AbstractTestElement implements Timer, Serializable { public final static String THROUGHPUT = "ConstantThroughputTimer.throughput"; private static List addableList = new LinkedList(); // The target time for the start of the next request: private long targetTime= 0; // Ideal interval between two requests to get the desired throughput: private long delay; /************************************************************ * !ToDo (Constructor description) ***********************************************************/ public ConstantThroughputTimer() { } /************************************************************ * !ToDo (Method description) * *@param throughput !ToDo (Parameter description) ***********************************************************/ public void setThroughput(long throughput) { setProperty(THROUGHPUT,new Long(throughput)); delay= 60000/throughput; } public void setRange(double range) { } public double getRange() { return (double)0; } public void setDelay(long delay) { } public long getDelay() { return 0; } /************************************************************ * !ToDoo (Method description) * *@return !ToDo (Return description) ***********************************************************/ public long getThroughput() { Object throughput = getProperty(THROUGHPUT); if(throughput instanceof Long) { return ((Long)throughput).longValue(); } else { return Long.parseLong((String)throughput); } } /************************************************************ * !ToDo (Method description) * *@return !ToDo (Return description) ***********************************************************/ public synchronized long delay() { long currentTime= System.currentTimeMillis(); long currentTarget= targetTime==0 ? currentTime : targetTime; targetTime=currentTarget+delay; if (currentTime > currentTarget) return 0; return currentTarget-currentTime; } /************************************************************ * !ToDo (Method description) * *@return !ToDo (Return description) ***********************************************************/ public String toString() { return JMeterUtils.getResString("constant_throughput_timer_memo"); } public Object clone() { ConstantThroughputTimer result= (ConstantThroughputTimer)super.clone(); result.targetTime= 0; return result; } } ````
asfimport commented 21 years ago

Jordi Salvat i Alabart (migrated from Bugzilla): Created attachment ConstantThroughputTimerGui.java: src/components/org/apache/jmeter/timers/gui/ConstantThroughputTimerGui.java

ConstantThroughputTimerGui.java ````java /* * ==================================================================== * The Apache Software License, Version 1.1 * * Copyright (c) 2001 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Apache" and "Apache Software Foundation" and * "Apache JMeter" must not be used to endorse or promote products * derived from this software without prior written permission. For * written permission, please contact apache@apache.org. * * 5. Products derived from this software may not be called "Apache", * "Apache JMeter", nor may "Apache" appear in their name, without * prior written permission of the Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * . */ package org.apache.jmeter.timers.gui; import java.awt.Font; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JComponent; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.border.Border; import javax.swing.border.EmptyBorder; import org.apache.jmeter.testelement.TestElement; import org.apache.jmeter.timers.ConstantThroughputTimer; import org.apache.jmeter.util.JMeterUtils; import org.apache.jorphan.gui.layout.VerticalLayout; /**************************************** * Title: JMeter Description: Copyright: Copyright (c) 2000 Company: Apache * *@author Michael Stover *@created $Date: 2002/10/17 19:47:15 $ *@version 1.0 ***************************************/ public class ConstantThroughputTimerGui extends AbstractTimerGui implements KeyListener { private final String DEFAULT_THROUGHPUT = "60"; private final String THROUGHPUT_FIELD = "Throughput Field"; private JTextField throughputField; /**************************************** * !ToDo (Constructor description) ***************************************/ public ConstantThroughputTimerGui() { init(); } /**************************************** * !ToDo (Method description) * *@param e !ToDo (Parameter description) *@param thrower !ToDo (Parameter description) ***************************************/ public static void error(Exception e, JComponent thrower) { JOptionPane.showMessageDialog(thrower, e, "Error", JOptionPane.ERROR_MESSAGE); } public String getStaticLabel() { return JMeterUtils.getResString("constant_throughput_timer_title"); } public TestElement createTestElement() { ConstantThroughputTimer timer = new ConstantThroughputTimer(); this.configureTestElement(timer); timer.setThroughput(Long.parseLong(throughputField.getText())); return timer; } public void configure(TestElement el) { super.configure(el); throughputField.setText(((ConstantThroughputTimer)el).getThroughput()+""); } /**************************************** * !ToDo (Method description) * *@param e !ToDo (Parameter description) ***************************************/ public void keyReleased(KeyEvent e) { String n = e.getComponent().getName(); if(n.equals(THROUGHPUT_FIELD)) { try { Long.parseLong(throughputField.getText()); } catch(NumberFormatException nfe) { if(throughputField.getText().length() > 0) { JOptionPane.showMessageDialog(this, "You must enter a valid number", "Invalid data", JOptionPane.WARNING_MESSAGE); // We reset the text to be an empty string instead // of the default value. If we reset it to the // default value, then the user has to delete // that value and reenter his/her own. That's // too much trouble for the user. } } } } /**************************************** * !ToDo (Method description) * *@param e !ToDo (Parameter description) ***************************************/ public void keyPressed(KeyEvent e) { } /**************************************** * !ToDo (Method description) * *@param e !ToDo (Parameter description) ***************************************/ public void keyTyped(KeyEvent e) { } private void init() { this.setLayout(new VerticalLayout(5, VerticalLayout.LEFT, VerticalLayout.TOP)); // MAIN PANEL JPanel mainPanel = new JPanel(); Border margin = new EmptyBorder(10, 10, 5, 10); mainPanel.setBorder(margin); mainPanel.setLayout(new VerticalLayout(5, VerticalLayout.LEFT)); // TITLE JLabel panelTitleLabel = new JLabel(JMeterUtils.getResString("constant_throughput_timer_title")); Font curFont = panelTitleLabel.getFont(); int curFontSize = curFont.getSize(); curFontSize += 4; panelTitleLabel.setFont(new Font(curFont.getFontName(), curFont.getStyle(), curFontSize)); mainPanel.add(panelTitleLabel); // NAME mainPanel.add(getNamePanel()); // throughput JPanel throughputPanel = new JPanel(); JLabel throughputLabel = new JLabel(JMeterUtils.getResString("constant_throughput_timer_throughput")); throughputPanel.add(throughputLabel); throughputField = new JTextField(6); throughputField.setText(DEFAULT_THROUGHPUT); throughputPanel.add(throughputField); mainPanel.add(throughputPanel); throughputField.addKeyListener(this); throughputField.setName(THROUGHPUT_FIELD); this.add(mainPanel); } } ````
asfimport commented 21 years ago

Jordi Salvat i Alabart (migrated from Bugzilla): Hi.

I'm attaching the code for a new Timer I've created which allows you to put the server under pre-specified load.

I've found this useful when the performance requirement to test against is in the lines of "the system should be able to serve X pages per minute with latencies lower than Y milliseconds." (Which is probably one of the best ways to express performance requirements).

To use it:

Note the rate is for the ensemble of all threads: adding more threads will cause each of them to run slower.

One difficulty I've encountered when writing this is that there's no method to signal a test component when the test is starting. I've assumed that a new timer object is created (or cloned) for every test run. The timer seems to behave as expected, so looks like this assumption is correct...

Salut,

Jordi.

asfimport commented 21 years ago

Mike Stover (migrated from Bugzilla): You can implement the TestListener interface to be notified of when the test starts.