Date: Sat, 2 Dec 2000 01:36:54 +0100 From: Ernst de Haan <ernst@jollem.com> To: Nate Williams <nate@yogotech.com> Cc: FreeBSD Java mailing list <freebsd-java@freebsd.org> Subject: Re: Performance hint for JDK on FreeBSD Message-ID: <20001202013654.A61526@c187104187.telekabel.chello.nl> In-Reply-To: <20001201192313.A59625@c187104187.telekabel.chello.nl>; from ernst@jollem.com on Fri, Dec 01, 2000 at 07:23:13PM %2B0100 References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl> <20001201185031.A58178@c187104187.telekabel.chello.nl> <20001201190827.A59487@c187104187.telekabel.chello.nl> <14887.59899.440931.811907@nomad.yogotech.com> <20001201192313.A59625@c187104187.telekabel.chello.nl>
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Ok, I tested the JDK 1.1.8 with the AWTTest utility, and I wrote a new program
to see if the creation of a java.awt.Frame would perhaps take a longer amount
of time on 1.1.8. Not. It seems JDK 1.1.8 just perhaps heaps better than
1.2.2...
I tested with a number of JDK's, all on my P2-400, 256 MB, 16 bit-color (!),
XFree86 4.0.1f:
* JDK 1.1.8/FreeBSD
* JDK 1.2.2b9/FreeBSD
* JDK 1.2.2b10/FreeBSD
* JDK 1.3.0_01/Linux (Sun)
* JDK 1.2.2rc4/Linux (Blackdown)
Here's three tables with run results, the column headers contain the run #.
Class load 1 2 3 4
---------------------------+------+------+------+------+
1.1.8/FreeBSD | 46 | 47 | 45 | 46 |
1.2.2b9/FreeBSD | 142 | 142 | 142 | 142 |
1.2.2b10/FreeBSD | 167 | 167 | 168 | 168 |
1.3.0_01/Linux (Sun) | 443 | 437 | 437 | 438 |
1.2.2rc4/Linux (Blackdown) | 315 | 313 | 315 | 314 |
AWT startup 1 2 3 4
---------------------------+------+------+------+------+
1.1.8/FreeBSD | 44 | 44 | 43 | 42 |
1.2.2b9/FreeBSD | 444 | 444 | 445 | 455 |
1.2.2b10/FreeBSD | 437 | 438 | 444 | 451 |
1.3.0_01/Linux (Sun) | 415 | 415 | 413 | 414 |
1.2.2rc4/Linux (Blackdown) | 1064 | 1070 | 1067 | 1063 |
Frame create 1 2 3 4
---------------------------+------+------+------+------+
1.1.8/FreeBSD | 17 | 19 | 17 | 18 |
1.2.2b9/FreeBSD | 13 | 13 | 14 | 14 |
1.2.2b10/FreeBSD | 11 | 11 | 12 | 12 |
1.3.0_01/Linux (Sun) | 12 | 12 | 12 | 12 |
1.2.2rc4/Linux (Blackdown) | 11 | 11 | 11 | 11 |
What surprises me most is that the native 1.1.8 was so fast. And I wonder why
the native 1.2.2b10 is just a bit slower than the older b9.
Ernst
Ernst de Haan wrote:
> Look twice, it's there :)
>
> Nate Williams wrote:
> > > Ok, the votes are counted, the results are in :) I've written a small Java
> > > program I wrote to produce new test results that should be reproducable on
> > > other (FreeBSD) systems too. I've included the .java file in an attachment,
> > > and, for your convenience, the AWTTest.class file.
> >
> > For those of us who are absolutely paranoid, can you send the original
> > .java file? I *hate* running binaries on my system that I know nothing
> > about. (No offense, to Ernst in implying that he's trying to breakin).
> >
> > Also, having the source allows it to be used for profiling when we do
> > additional ports and such.
> >
> > Thanks!
> >
> >
> > Nate
> >
> > > Ernst de Haan wrote:
> > > > Heya Kees-Jan and all,
> > > >
> > > >
> > > > > > I never knew that it is a 400% performance boost, which does sound a little
> > > > > > strange. I'm really curious why that is.
> > > > >
> > > > > Well, I turned on profiling, and found that most of the time is spent in X11
> > > > > specific Java code. I will re-run the tests after I temporarily disabled your
> > > > > suggested modifications.
> > > >
> > > > Okay, I did a little profiling (using -Xrunhprof:cpu=times). This is the top
> > > > 10 when I dont have the modified font.properties file:
> > > >
> > > > CPU TIME (ms) BEGIN (total = 29358) Fri Dec 1 17:55:12 2000
> > > > rank self accum count trace method
> > > > 1 24.71% 24.71% 253952 1304 sun/io/CharToByteSingleByte.getNative
> > > > 2 16.04% 40.76% 8188 1399 sun/io/CharToByteSingleByte.convert
> > > > 3 12.93% 53.69% 253952 182 java/lang/String.charAt
> > > > 4 2.25% 55.94% 8184 620 java/lang/Throwable.fillInStackTrace
> > > > 5 1.44% 57.38% 8258 938 java/lang/String.<init>
> > > > 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts
> > > > 7 1.21% 59.93% 8184 867 java/lang/Throwable.<init>
> > > > 8 1.08% 61.01% 10958 153 java/io/StreamTokenizer.read
> > > > 9 1.07% 62.08% 10958 623 java/io/BufferedInputStream.read
> > > > 10 0.91% 62.99% 318 123 java/util/Properties.loadConvert
> > > >
> > > > The traces for the top 3 are:
> > > >
> > > > TRACE 1304:
> > > > sun/io/CharToByteSingleByte.getNative
> > > > sun/io/CharToByteSingleByte.convert
> > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > >
> > > > TRACE 1399:
> > > > sun/io/CharToByteSingleByte.convert
> > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > > sun/awt/X11GraphicsEnvironment.registerNativeFonts
> > > > sun/java2d/SunGraphicsEnvironment$2.run
> > > >
> > > > TRACE 182:
> > > > java/lang/String.charAt
> > > > sun/io/CharToByteSingleByte.getNative
> > > > sun/io/CharToByteSingleByte.convert
> > > > sun/awt/font/NativeFontWrapper.registerFonts
> > > >
> > > > Here are the startup times for AWT:
> > > >
> > > > Original: w/modifications:
> > > > ---------------- ------------------------------
> > > > run 1: 2607 ms 608 ms
> > > > run 2: 2579 ms 573 ms
> > > > run 3: 2583 ms 601 ms
> > > > run 4: 2713 ms 599 ms
> > > >
> > > > Note: The only modifications performed are adding the URW fonts to my
> > > > XF86Config and using the font.properties from Kees-Jan's site instead of the
> > > > original one!
> > > >
> > > > Here is the top 10 of CPU time eaters for my application with the
> > > > modifications applied:
> > > >
> > > > CPU TIME (ms) BEGIN (total = 9169) Fri Dec 1 17:46:56 2000
> > > > rank self accum count trace method
> > > > 1 2.91% 2.91% 318 110 java/util/Properties.loadConvert
> > > > 2 2.75% 5.66% 252 109 java/util/Properties.loadConvert
> > > > 3 2.25% 7.91% 5 158 java/util/Properties.load
> > > > 4 1.98% 9.89% 6356 987 java/lang/String.indexOf
> > > > 5 1.73% 11.63% 5479 584 java/io/BufferedInputStream.read
> > > > 6 1.73% 13.36% 5479 142 java/io/StreamTokenizer.read
> > > > 7 1.49% 14.85% 8590 203 java/lang/StringBuffer.append
> > > > 8 1.42% 16.27% 8590 675 java/lang/String.charAt
> > > > 9 1.41% 17.68% 8133 946 java/lang/StringBuffer.append
> > > > 10 1.36% 19.04% 8133 207 java/lang/String.charAt
> > > >
> > > > Now all of a sudden my application code comes on top. And that's the way I
> > > > like it! :)
> > > >
> > > > IMHO these results are quite amazing!
> > > >
> > > > Next thing I'll do is write a small program that will do nothing but starting
> > > > AWT and displaying the startup times, as the current results are obtained by
> > > > looking at the log output of my own Swing application.
> > > >
> > > >
> > > > Ernst
> > > >
> > > >
> > > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > > with "unsubscribe freebsd-java" in the body of the message
> > > >
> > > public class AWTTest {
> > >
> > > public static void main(String[] args) throws Exception {
> > >
> > > // Load the Toolkit class from the AWT package
> > > long beforeClassLoad = System.currentTimeMillis();
> > > Class c = Class.forName("java.awt.Toolkit");
> > > long afterClassLoad = System.currentTimeMillis();
> > >
> > > // Get the getDefaultToolkit() class function
> > > java.lang.reflect.Method m = c.getMethod("getDefaultToolkit", null);
> > >
> > > // Invoke the class function
> > > long beforeInvoke = System.currentTimeMillis();
> > > m.invoke(null, null);
> > > long afterInvoke = System.currentTimeMillis();
> > >
> > > long t1 = afterClassLoad - beforeClassLoad;
> > > long t2 = afterInvoke - beforeInvoke;
> > >
> > > System.out.println("Class load took: " + t1 + " ms.");
> > > System.out.println("AWT startup took: " + t2 + " ms.");
> > > System.exit(0);
> > > }
> > > }
> >
>
>
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