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From: | David P Grove |
Subject: | Jikes RVM 2.3.2 is now available |
Date: | Mon, 12 Apr 2004 11:34:53 -0400 |
Jikes RVM 2.3.2 is now available
from the developerworks web site (http://www-124.ibm.com/developerworks/oss/jikesrvm/).
The release notes are appended below. Of particular note is that of version 2.3.2 it is possible to build Jikes RVM entirely with free software tools. *Highlights of this release include: ** Jikes RVM 2.3.2 requires classpath 0.08. **64-bit port of baseline compiler and runtime system to PowerPC64/AIX is complete. We have been passing all regression tests on PPC64/AIX for over a month. NOTE: porting of the optimizing compiler has not yet begun (contributions/collaborations welcome) and therefore no configuration with the optimizing compiler will work in 64 bit mode. ** The default GC plan for the prototype, prototype-opt, development, and production configurations has been changed from CopyMS to GenMS. GenMS is a generational collector with an Appel-style nursery and a mark-sweep mature space. ** Jikes RVM now runs on newer versions of Linux/PowerPC that store the pthread id in R2. Building Jikes RVM with RVM_FOR_SINGLE_VIRTUAL_PROCESSOR=0 is reported to work on top of these newer Linux releases, which resolves a long-standing limitation of Jikes RVM on Linux/PowerPC. **Source Code editing support There are now VIM and Emacs style files supporting the Jikes RVM coding style for C, Java, and C++. See rvm/etc/README. (This should have been in the 2.3.1 release announcement but was not.) **You can build Jikes RVM entirely with free software tools You can now build Jikes RVM using the Kaffe virtual machine. Details in the installation section in the user's guide. *Other notes: **Performance improvements in VM_Memory copying routines used by System.arraycopy and copying GC resulted in 10% improvement in SPECjbb2000 throughput. *Bug Fixes: ** Fixed problems in alignment support in JMTk that were causing crashes in GC on PowerPC/AIX when doubleword alignment of long[] and double[] was enabled. This is a bug that was introduced in version 2.3.1 and is fixed in 2.3.2. ** Fixed performance problem in profile-directed inlining where the AI Organizer forces recompilation of methods in an attempt to inline runtime service routines that won't be inlined no matter how many times we try. Problem has always existed, but became much more severe in 2.3.0 release when we disabled the inlining of allocation sequences if the size of the object was not known at compile time. ** Fixed bug in which non-virtualizable interface calls where not being considered as candidates for feedback-directed inlining. ** We now provide all of the mandatory system properties for the Java 1.4.2 API. ** Fixed bug in which the time zone code always thought the user was on New York time. ** We now can print a meaningful message when we get an ErrorInInitializerError in the early stages of booting the VM before it is able to load in new classes. We had incorrectly left ErrorInInitializerError out of the VM's list of boot classes. ** If an uncaught exception is thrown while booting, we no longer try to print to the uninitialized System.err stream. That used to trigger a NullPointerException. |
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