OK, here are some figures.
I have been trying to get the performance measurement code out of my
employers testing framework. Now I am using 2 Linux/x86 machines with
JDK1.4.0, The figures are quite amazing, so I am suspecting something is
wrong.
First run is using the original 1.2beta4, next my patched version:
Clientside:
ole@sniper:~/down> java -cp
tmp/jakarta-log4j-1.2beta4/dist/lib/log4j-1.2beta4.jar:$CLASSPATH
-Dlog4j.configuration=log.xml LogTest
Benchmark no 1 running...
msec: 36423
Logs/sec: 411.8551464733822
Benchmark no 2 running...
msec: 34961
Logs/sec: 429.0781156145419
Benchmark no 3 running...
msec: 34919
Logs/sec: 429.5942037286291
Benchmark no 4 running...
msec: 34969
Logs/sec: 428.9799536732535
Benchmark no 5 running...
msec: 34929
Logs/sec: 429.47121303215096
Benchmark no 6 running...
msec: 34957
Logs/sec: 429.12721343364706
Finishing beating..
ole@sniper:~/down> java -Dlog4j.configuration=log.xml
LogTest
Benchmark no 1 running...
msec: 5827
Logs/sec: 2574.3950574909904
Benchmark no 2 running...
msec: 5259
Logs/sec: 2852.4434303099447
Benchmark no 3 running...
msec: 4905
Logs/sec: 3058.3078491335373
Benchmark no 4 running...
msec: 5383
Logs/sec: 2786.736020806242
Benchmark no 5 running...
msec: 4791
Logs/sec: 3131.079106658318
Benchmark no 6 running...
msec: 5198
Logs/sec: 2885.9176606387073
Finishing beating..
ole@sniper:~/down>
Serverside:
java -cp log4j-org.jar org.apache.log4j.net.SocketServer 5000
./socketServer.lcf .
and
java -cp log4j-1.2beta4.jar org.apache.log4j.net.SocketServer 5000
./socketServer.lcf .
This is about 6 times faster, formerly I was using a Sun as server which
might make some difference.
The test repeats a few times to let hotspot do some work.
LogTest.java and the configuration files are attached.
The machines are running Linux 2.4.19 and are 700/733 MHz
They are connected via a 100 Mbit switched network.
When both client and server are on the same machine I get a similar
ratio. Approx. 1600 with Externalizable and 360 with Serializable.
BR
Ole Dalgaard
On tir, 2002-03-26 at 22:47, Ceki Gülcü wrote:
Can you please supply more details about your performance tests?
How fast are the machines? How are they connected? What happens
when the client and server are on the same machine? Can you provide
actual figures? Thank you. Ceki
import org.apache.log4j.*;
import org.apache.log4j.net.*;
public class LogTest {
public static void main(String[] args) throws Exception {
class LogTester extends Thread {
private Logger logger = null;
private Class[] classes = null;
public LogTester(Class[] classes) {
super();
this.classes = classes;
}
public void run() {
NullPointerException npe = new NullPointerException("Test");
for(int i = 0; i < 1000; i++) {
for(int j = 0; j < classes.length; j++) {
logger = Logger.getLogger(classes[j]);
logger.fatal("fatal=[" + i + "]");
logger.error("error=[" + i + "]");
logger.debug("debug=[" + i + "]");
logger.info("info=[" + i + "]");
logger.warn("warn=[" + i + "]");
}
}
logger.error("error=[TEST]", npe);
}
}
Class[] classes = new Class[] { java.lang.System.class, javax.swing.JLabel.class, org.apache.log4j.LogManager.class };
LogTester log = null;
for(int o=1; o<7; o++) {
System.out.println("\nBenchmark no "+o+" running...");
long timer = System.currentTimeMillis();
for(int i = 0; i < 3; i++) {
log = new LogTester(classes);
log.start();
}
try {
log.join();
} catch(InterruptedException ie) {
// ignore
}
long timer2 = System.currentTimeMillis();
System.out.println("msec: "+(timer2-timer));
System.out.println("Logs/sec: "+(15001*1000.0)/(timer2-timer));
}
System.out.println("Finishing beating..");
}
}
# -------------------------------------------------------------------
# This config file is intended to be used by a SocketServer that logs
# events received from various clients on the console.
# -------------------------------------------------------------------
log4j.rootCategory=DEBUG, A1
log4j.category.org.apache.log4j.net=DEBUG
log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.file=logfile.log
log4j.appender.A1.datePattern='.'yyyy-MM-dd
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d{ISO8601} %-5p [%t] %c{3} %x - %m%n
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/";>
<appender name="A1" class="org.apache.log4j.net.SocketAppender">
<param name="RemoteHost" value="sniper"/>
<param name="Port" value="5000"/>
<param name="LocationInfo" value="false"/>
</appender>
<category name="java.lang">
<priority value="DEBUG"/>
</category>
<category name="javax">
<priority value="DEBUG"/>
</category>
<category name="org.apache">
<priority value="DEBUG"/>
</category>
<root>
<priority value="debug"/>
<appender-ref ref="A1"/>
</root>
</log4j:configuration>
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