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Posted to commits@harmony.apache.org by "Xiao-Feng Li (JIRA)" <ji...@apache.org> on 2007/01/06 15:00:27 UTC
[jira] Updated: (HARMONY-2945) [DRLVM][GCv5] parallel generational
or non-generational collection
[ https://issues.apache.org/jira/browse/HARMONY-2945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiao-Feng Li updated HARMONY-2945:
----------------------------------
Attachment: GCv5-parallelization-1-5.patch
> [DRLVM][GCv5] parallel generational or non-generational collection
> ------------------------------------------------------------------
>
> Key: HARMONY-2945
> URL: https://issues.apache.org/jira/browse/HARMONY-2945
> Project: Harmony
> Issue Type: Improvement
> Components: DRLVM
> Environment: Windows and Linux IA32
> Reporter: Xiao-Feng Li
> Attachments: GCv5-parallelization-1-5.patch
>
>
> Hi, attached is a patch for GCv5 which achieves good parallelization scalability in real SMP machine. It can works in generational or nongenerational mode. I have tested it on a Intel Tulsa platform which has four Pentium-D dual-core processors (totally 8 cores). It performs pretty well. With more processors and larger heap size, this parallel GC can demonstrate more benefits.
> There are two dependences:
> 1. To fully exploit this GC's adavantage, helper inlining should be enabled for it. It depends on Harmony-2652 which inlines write barrier.
> 2. Some JIT optimizations do not implement write barrer for reference field update. These opts have to be disabled to make the generational mode work.
> At the same time before the two dependences are resolved, people still can play with it in non-generational mode. But the performance will be impacted seriously without helper inlinings.
> Dear commiter, please help to integrate it into Harmony SVN. Please apply the patch at working_vm directory.
> Thanks,
> xiaofeng
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