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From Egor Pasko <egor.pa...@gmail.com>
Subject Re: [drlvm]Leave classunloading on by default?
Date Mon, 19 Nov 2007 07:55:06 GMT
On the 0x393 day of Apache Harmony Rana Dasgupta wrote:
> Could someone please commit JIRA 4931 to turn on the feature by default?

did you check it on DaCapo from svn? just interesting..

> Thanks,
> Rana
> 
> On Nov 16, 2007 2:57 PM, Tim Ellison <t.p.ellison@gmail.com> wrote:
> 
> > Robin Garner wrote:
> > > Rana Dasgupta wrote:
> > >>   BTW, I have been unable to find a scenario that stresses the gc
> > >> heap, and needs to unload unused classes, and it would be good find
> > >> such  test cases.
> > >
> > > The DaCapo benchmarks project is currently evaluating new benchmarks,
> > > and in svn right now there is a derby benchmark based on JDBCBench (ie
> > > almost a direct copy of the hsqldb benchmark).
> > >
> > > Because derby compiles SQL queries into Java classes, after a couple of
> > > iterations of the benchmark, it requires class unloading.  The benchmark
> > > appears to run in a ~25M heap, and allocates much more than that.
> > >
> > > It's almost certain that we won't release this as the final derby
> > > benchmark, but I might package it separately as a class-unloading unit
> > > test.  But in the meantime, if you want to build dacapo from svn head,
> > > it might be exactly what you're after.
> >
> > ack -- thanks Robin.  At the very least it may inspire somebody to write
> > a stress test that creates lots of new classes in order to exercise
> > Harmony's class unloading code.
> >
> > Regards,
> > Tim
> >

-- 
Egor Pasko


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