http://labb.zafena.se Wed, 10 Mar 2010 16:57:10 +0000 http://backend.userland.com/rss092 en When making a programming tool or a virtual machine getting the tool running perfectly stable without any crash bugs are always on a higher priority than gaining more speed. A crashing tool are a broken tool so I will share some tricks that I have practised to find and fix ... http://labb.zafena.se/?p=362 I have from time to time been working on a automatic CPU feature tuning code for Shark to make the LLVM JIT generate better code for Cortex-A8 class ARM CPUs. Using it i was able to gain some substantial speed-improvements, all in all it made Shark generate 30% faster code ... http://labb.zafena.se/?p=337 During the past months i have seen some really cool stuff done using small powerefficient ARM computers and OpenJDK. [caption id="attachment_318" align="alignright" width="225" caption="Simple Simon PT connected to a hospital laboratory system by using a powerefficient plugcomputer and displaylink usb screen. All powered by OpenJDK"][/caption] Simple Simon PT connects: This project hooks up ... http://labb.zafena.se/?p=316 The results displayed are generated using the debug build of shark, with assertions, that I made on the 6th of October compared against release builds of the pure zero cpp interpreter and the optimised zero assembler interpreter, both from Icedtea6-1.6.1. Did we gain anything from having a jumping shark? By ... http://labb.zafena.se/?p=282 [caption id="attachment_258" align="alignnone" width="300" caption="The picture that made my day!"][/caption] Ok.. so what happened? xerxes@babbage-karmic:/wd/icedtea6/openjdk/build/linux-arm/bin$ ./java -version java version "1.6.0_0" OpenJDK Runtime Environment (IcedTea6 1.7pre-r2a3725ce72d4) (build 1.6.0_0-b16) OpenJDK Shark VM (build 14.0-b16-product, mixed mode) xerxes@babbage-karmic:/wd/icedtea6/openjdk/build/linux-arm/bin$ cat /proc/cpuinfo Processor    : ARMv7 Processor rev 1 (v7l) BogoMIPS    : 799.53 Features    : swp half thumb fastmult vfp edsp CPU implementer    : 0x41 CPU architecture: ... http://labb.zafena.se/?p=257 4 running ARM developement boards are hidden in this picture, can you find them? The ARM developement gear that I have access to have been rapidly upgraded during the past months and I do no longer experience any memory or storage bottlenecks. The boards in the picture are running native compiles, ... http://labb.zafena.se/?p=251 Dear Jalimo users! I have pushed a quite massive patch into the Jalimo sourcetree to make all OpenJDK 6b16 recipe's in sync with and able to cross-compile the latest Icedtea6-1.6.1 release! So... What’s New? —————– - Security fixes for: CVE-2009-2670 – OpenJDK Untrusted applet System properties access CVE-2009-2671 CVE-2009-2672 – OpenJDK Proxy mechanism information leaks CVE-2009-2673 – ... http://labb.zafena.se/?p=246 The Haiku team finally made it, they have released their first spin of the free software implementation of "BeOS"! The R1/alpha 1 release and source can be fetched from: http://www.haiku-os.org/get-haiku Dig around and you will even find a long anticipated status update on their ARM port where they now can display ... http://labb.zafena.se/?p=242 During the past month i have been running a public llvm-arm-linux buildbot in order to iron out the remaining bugs in the LLVM Execution Engine JIT for ARM. My goal was to stabilise the LLVM JIT so that it can be used to speed up cool projects like OpenJDK on ARM ... http://labb.zafena.se/?p=234 IcedTea is served: openjdk/build/linux-i586 mkdir -p stamps touch stamps/icedtea.stamp printf -- '-cacao ERROR\n' >> openjdk/build/linux-i586/j2sdk-image/jre/lib/i386/jvm.cfg touch stamps/add-cacao.stamp printf -- '-zero ERROR\n' >> openjdk/build/linux-i586/j2sdk-image/jre/lib/i386/jvm.cfg touch stamps/add-zero.stamp xerxes@labbserver:~/icedtea6$ openjdk/build/linux-i586/j2sdk-image/bin/java -version java version "1.6.0_0" OpenJDK Runtime Environment (IcedTea6 1.5-rce70ed27635c) (build 1.6.0_0-b16) OpenJDK Shark VM (build 14.0-b15, mixed mode) xerxes@labbserver:~/icedtea6$ http://labb.zafena.se/?p=231