The submitted revision is downloadable in JIRA-1428 at: http://issues.apache.org/jira/secure/attachment/12342430/gcv5-r0.10.zip
Attached in this email is the gc.xml file I am using that replaces existing one for building gc. Below is the submission description: Attached file gcv5-r0.10.zip is first version of the generational mark-compaction GC for GCv5, which combines previous two submitted collectors as planned. That is, a trace-forward collector for minor collection and a mark-compaction collector for major collection. An additon of a copying algorithm is also developed that copies nursery live objects to mature space during a major collection. This revision has subtantial improvement in threading part. Although it's still single threaded collector, the framework for multithreading is ready. Basically, it has mutators and collectors to model the application threads and collection threads. A major design concept in this revision that was not made very clear in previous submissions is "space". "GC" is a concept of a full (or standalone) garbage collector design. One GC can have multiple spaces, each of which can employ different "collection policy". With this design idea in mind, the previous trace-forward GC is adapted to be the collection policy for the nursery space, and the mark-compaction GC is adapted to be the collection policy of the mature space. As an embodiment of the design idea, GCv5 eliminates the global gc variable in existing Harmony GC, and different space managements only need to know a general gc data structure, instead of the generational gc structure. This revision has been tested on Windows with SPECJVM98. As the first actual generational GC, any comments (or questions) are welcome! -xiaofeng
[DRLVM] first batch of files for GCv5, a trace-forward copying collector ------------------------------------------------------------------------ Key: HARMONY-1428 URL: http://issues.apache.org/jira/browse/HARMONY-1428 Project: Harmony Issue Type: Improvement Components: DRLVM Environment: These files were only tested on Windows with VS.NET 2003. Reporter: Xiao-Feng Li Assigned To: weldon washburn Attachments: gc_v5.001.zip, GCv5-mc001.zip, gcv5-r0.10.zip This archive has a couple of files implementing an early version of a trace-forward copying collector for GCv5. It's only a starter with very basic functionalities. It is a generational GC reqiures write barrier implemented in JIT. It was tested with JET, and ran SPECJBB2000 and SPECJVM98. The algorithm is depth-first tracing of From-space, and forwarding live objects to To-space (It can forward part of the From-space). The To-space has no real management except for the accomodation of forwarded objects and large objects. So the To-space is going to be replaced by a mark-compaction GC, and the large objects will be managed by a LOS GC. In order to minimize the changes to other components of DRLVM, the codes here comply with the original contract between GCv4 and other components. I also borrowed some routine code from GCv4 to avoid repetitive labor work. GCv5 is under active development, so please expect quick and big changes to this submitted code base. I will submit new codes from time to time when they are worth a submission. Any comments or codes are more than welcome.
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<?xml version="1.0" encoding="ISO-8859-1"?> <!-- Copyright 2005-2006 The Apache Software Foundation or its licensors, as applicable. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <!-- Author: Marina V. Goldburt, Dmitry B. Yershov Version: $Revision: 1.1.1.1 $ --> <!-- This is build descriptor for the component "vm.gc". Please refer to make/components/README.txt for details about the component build descriptor structure. --> <project name="vm.gc"> <target name="init" depends="common_vm"> <property name="build.depends" value="extra.apr,vm.vmcore" /> <property name="outtype" value="shared" /> <property name="libname" value="gc" /> <property name="src" location="${build.vm.home}" /> <compiler id="cpp.compiler" extends="common.cpp.compiler"> <includepath> <pathelement location="${extra.apr.includes}" /> </includepath> <includepath> <dirset dir="${build.vm.home}"> <include name="include" /> <include name="vmcore/include" /> <include name="vm/interface" /> <select os="win"> <include name="vmcore/src/util/win/include" /> </select> <select os="lnx"> <include name="vmcore/src/util/linux/include" /> </select> </dirset> </includepath> <fileset dir="${src}/gc/src"> <include name="common/*.cpp" /> <include name="gen/*.cpp" /> <include name="thread/*.cpp" /> <include name="mark_sweep/*.cpp" /> <include name="trace_forward/*.cpp" /> <include name="mark_compact/*.cpp" /> <include name="verify/*.cpp" /> </fileset> <defineset define="BUILDING_GC" /> <select os="win"> <defineset define="_USRDLL" /> </select> <select os="win" cfg="release" cxx="icl"> <compilerarg value="/Qip" /> </select> </compiler> <select os="win" arch="ipf"> <fileset id="asm.fileset" dir="${build.vm.home}/gc/src"> <include name="ini_ipf_low_level.asm" /> </fileset> </select> <linker id="linker" extends="common.linker"> <select os="win"> <syslibset libs="advapi32,odbc32,ws2_32,mswsock" /> </select> <select os="win" arch="ipf"> <syslibset libs="AdvAPI32" /> </select> <select os="win" cfg="debug"> <linkerarg value="/NODEFAULTLIB:libcmtd.lib" /> <syslibset libs="msvcrtd" /> </select> <libset libs="${vm.vmcore.lib}" dir="${vm.vmcore.libdir}" /> <select os="lnx"> <linkerarg value="-Bsymbolic" /> </select> </linker> </target> </project>
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