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The source code

// $Header: /home/cvs/jakarta-jmeter/src/monitor/components/org/apache/jmeter/monitor/util/MemoryBenchmark.java,v 1.2 2004/03/19 23:29:25 sebb Exp $ 
/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * 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 org.apache.jmeter.monitor.util;

import java.util.List;
import java.util.LinkedList;
import org.apache.jmeter.monitor.model.*;
import org.apache.jmeter.visualizers.*;
/**
 * 
 * @version $Revision: 1.2 $ $Date: 2004/03/19 23:29:25 $
 */
public class MemoryBenchmark
{

    public static void main(String[] args)
    {
    	if (args.length != 1){
    		int objects = 10000;
			if (args[0] != null){    		
				objects = Integer.parseInt(args[0]);
			}
			List objs = new LinkedList();
			ObjectFactory of = ObjectFactory.getInstance();
			
			long bfree = Runtime.getRuntime().freeMemory();
			long btotal = Runtime.getRuntime().totalMemory();
			//long bmax = Runtime.getRuntime().maxMemory();//JDK1.4 only
			System.out.println("Before we create objects:");
			System.out.println("------------------------------");
			System.out.println("free: " + bfree);
			System.out.println("total: " + btotal);
			//System.out.println("max: " + bmax);
			
    		for (int idx=0; idx < objects; idx++){
				Connector cnn = of.createConnector();
    			Workers wkrs = of.createWorkers();
    			for (int idz=0; idz < 26; idz++){
					Worker wk0 = of.createWorker();
					wk0.setCurrentQueryString("/manager/status");
					wk0.setCurrentUri("http://localhost/manager/status");
					wk0.setMethod("GET");
					wk0.setProtocol("http");
					wk0.setRemoteAddr("?");
					wk0.setRequestBytesReceived(132);
					wk0.setRequestBytesSent(18532);
					wk0.setStage("K");
					wk0.setVirtualHost("?");
					wkrs.getWorker().add(wk0);
    			}
    			cnn.setWorkers(wkrs);
    			
    			RequestInfo rqinfo = of.createRequestInfo();
    			rqinfo.setBytesReceived(0);
    			rqinfo.setBytesSent(434374);
    			rqinfo.setErrorCount(10);
    			rqinfo.setMaxTime(850);
    			rqinfo.setProcessingTime(2634);
    			rqinfo.setRequestCount(1002);
    			cnn.setRequestInfo(rqinfo);
    			
    			ThreadInfo thinfo = of.createThreadInfo();
    			thinfo.setCurrentThreadCount(50);
    			thinfo.setCurrentThreadsBusy(12);
    			thinfo.setMaxSpareThreads(50);
    			thinfo.setMaxThreads(150);
    			thinfo.setMinSpareThreads(10);
    			cnn.setThreadInfo(thinfo);
    			
    			Jvm vm = of.createJvm();
    			Memory mem = of.createMemory();
    			mem.setFree(77280);
    			mem.setTotal(134210000);
    			mem.setMax(134217728);
    			vm.setMemory(mem);

    			Status st = of.createStatus();
    			st.setJvm(vm);
    			st.getConnector().add(cnn);
    			
    			MonitorStats mstats = new MonitorStats(
					Stats.calculateStatus(st),
					Stats.calculateLoad(st),
					0,
					Stats.calculateMemoryLoad(st),
					Stats.calculateThreadLoad(st),
					"localhost",
					"8080",
					"http",
					System.currentTimeMillis());
				MonitorModel monmodel = new MonitorModel(mstats);
				objs.add(monmodel);
    		}
			long afree = Runtime.getRuntime().freeMemory();
			long atotal = Runtime.getRuntime().totalMemory();
			//long amax = Runtime.getRuntime().maxMemory();//JDK1.4 only
			long delta = ((atotal - afree) - (btotal - bfree)); 
			System.out.println("After we create objects:");
			System.out.println("------------------------------");
			System.out.println("free: " + afree);
			System.out.println("total: " + atotal);
			//System.out.println("max: " + amax);
			System.out.println("------------------------------");
			System.out.println("delta: "+ (delta/1024) + " kilobytes");
			System.out.println("delta: "+ (delta/1024/1024) + " megabytes");
			System.out.println("number of objects: " + objects);
			System.out.println("potential number of servers: " +
				(objects/1000));			

    	} else {
    		System.out.println("Please provide the number of objects");
    	}
    }
}
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