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From "Xiao-Feng Li" <xiaofeng...@gmail.com>
Subject Re: [DRLVM][GC] I've made GCv5 the default GC
Date Mon, 07 May 2007 13:50:25 GMT
Thanks. Will check. -xiaofeng

On 5/7/07, Ivan Popov <ivan.g.popov@gmail.com> wrote:
> I submitted https://issues.apache.org/jira/browse/HARMONY-3820
>
> Thanks.
> Ivan
>
> On 5/7/07, Ivan Popov <ivan.g.popov@gmail.com> wrote:
> > I see many Eclipse TPTP profiler tests failed today after switching
> > Harmony to GCv5. This failure needs deeper investigation, but at the
> > first glance it was caused by incorrect reporting JVMTI threads. Also,
> > I see strange threads list in Eclipse debugger. The "main" thread
> > group now contains lot of "finalizer" threads and does not include
> > "main" thread. Using gc_cc.dll solves this problem. I'm going to
> > submit JIRA against GCv5.
> >
> > Thanks.
> > Ivan
> >
> > PS:
> > Threads reported by Eclipse debugger (using gc_gen):
> >
> >         HelloWorld at localhost:1067
> >                 Thread Group [system]
> >                         Thread Group [main]
> >                                 Daemon Thread [ref handler] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >                                 Daemon Thread [finalizer] (Running)
> >
> > Threads reported by Eclipse debugger (using gc_cc.dll)
> >
> >         HelloWorld at localhost:1045
> >                 Thread Group [system]
> >                         Daemon System Thread [FinalizerThread] (Running)
> >                         Thread Group [main]
> >                                 Thread [main] (Suspended (breakpoint at line 5 in
HelloWorld))
> >                                         HelloWorld.main(String[]) line: 5
> >
> >
> > On 5/6/07, Xiao-Feng Li <xiaofeng.li@gmail.com> wrote:
> > > Hi, folks, I've switched GCv5 to be the default GC. In today's
> > > CruiseControl tests with GCv5, shown at
> > > http://www.harmonytest.org/upload/cc2.html, we can see all tests
> > > passed. I known there are still potential bugs, we fix them once
> > > exposed.
> > >
> > > If you have some workloads having problem with GCv5, please try GCv4.1
> > > with command option -XX:vm.dlls=gc_cc.dll . At the moment, there are
> > > two known issues, one is the intermittent failure with kernel.test
> > > java.langThreadTest; the other is that it has currently minimum 256MB
> > > heap size. The former one is hard to reproduce, the second one is easy
> > > to fix. Welcome feedbacks and suggestions. Thanks.
> > >
> > > There are still lots of work to do to make Harmony GC close to be
> > > perfect. To switch from GCv4.1 to GCv5 is only one step towards the
> > > goal, well it is an important step in my opinion. Next step, besides
> > > continuing GCv5 polishment, is to develop a low-pause-time GC. I will
> > > post a high level design soon.
> > >
> > > Thanks,
> > > xiaofeng
> > >
> >
>


-- 
http://xiao-feng.blogspot.com

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