harmony-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ivan Popov" <ivan.g.po...@gmail.com>
Subject Re: [DRLVM][GC] I've made GCv5 the default GC
Date Mon, 07 May 2007 13:14:17 GMT
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
> >
>

Mime
View raw message