From owner-freebsd-java Fri Dec 1 9:51:24 2000 Delivered-To: freebsd-java@freebsd.org Received: from heinz.jollem.com (c104187.upc-c.chello.nl [212.187.104.187]) by hub.freebsd.org (Postfix) with ESMTP id BC9BA37B400 for ; Fri, 1 Dec 2000 09:51:20 -0800 (PST) Received: (from ernst@localhost) by heinz.jollem.com (8.11.1/8.9.3) id eB1HoVG59088; Fri, 1 Dec 2000 18:50:31 +0100 (CET) (envelope-from ernst) Date: Fri, 1 Dec 2000 18:50:31 +0100 From: Ernst de Haan To: "Koster, K.J." Cc: FreeBSD Java mailing list Subject: Re: Performance hint for JDK on FreeBSD Message-ID: <20001201185031.A58178@c187104187.telekabel.chello.nl> References: <59063B5B4D98D311BC0D0001FA7E4522026D7A7D@l04.research.kpn.com> <20001201174923.A57144@c187104187.telekabel.chello.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <20001201174923.A57144@c187104187.telekabel.chello.nl>; from ernst@jollem.com on Fri, Dec 01, 2000 at 05:49:23PM +0100 Sender: owner-freebsd-java@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org 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. 6 1.33% 58.71% 1 1275 sun/awt/font/NativeFontWrapper.registerFonts 7 1.21% 59.93% 8184 867 java/lang/Throwable. 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