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November 2011

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Subject:
Re: Problem Invalid memory access of location
From:
Rodrigo Barros <[log in to unmask]>
Reply To:
ECJ Evolutionary Computation Toolkit <[log in to unmask]>
Date:
Thu, 10 Nov 2011 17:43:04 -0200
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Yea, I thought so. Thank you anyway Sean.

On 10 November 2011 17:20, Sean Luke <[log in to unmask]> wrote:

> Looks like a bug in the OS X Java VM.
>
>
> http://stackoverflow.com/questions/1297051/what-is-causing-the-java-vm-on-os-x-to-crash-with-invalid-memory-access-of-loca
>        http://code.google.com/p/google-web-toolkit/issues/detail?id=3491
>
> I think that 32 bits maxes out at 3GB, so you might try running something
> like
>
>        java -server -d32 -Xmx3GB -Xms3GB ...
>
> Sean
>
> On Nov 10, 2011, at 1:03 PM, Rodrigo Barros wrote:
>
> > Dear all,
> >
> > I'm running ECJ on a macbook with OSX Lion (10.7.2), 8GB ram and Java
> 1.6.0_29.
> > I have noticed that my app (a GA for evolving decision-tree
> parameters/components) crashes when running in large datasets (I get a
> "Invalid memory access of location" error). This is a bit strange because
> when I set the JVM to run in 32-bit mode (-d32) or in interpretable mode
> (-Xint) the GA works fine (though MUCH slower than 64bits normal mode).
> >
> > Do you have any idea of what seems to be the problem? I don't think it's
> a hardware problem since I tested it on other computer and got the same
> error message (though it was also a computer running OSX). Perhaps there's
> a bug in memory management of OSX and 64bits JVM in applications running
> several threads??
> >
> > Thank you in advance!
> >
> > --
> > Rodrigo Coelho Barros, MSc.
> > PhD Student
> > Bioinspired Computation Laboratory (BioCom)
> > Department of Computer Science
> > University of São Paulo at São Carlos (ICMC-USP)
> >
> > www.icmc.usp.br/~rcbarros <http://www.icmc.usp.br/%7Ercbarros>
> > e-mail (1): [log in to unmask]
> > e-mail (2): [log in to unmask]
> >
> > mobile: +55 16 8138-3627
>



-- 
Rodrigo Coelho Barros, MSc.
PhD Student
Bioinspired Computation Laboratory (BioCom)
Department of Computer Science
University of São Paulo at São Carlos (ICMC-USP)

www.icmc.usp.br/~rcbarros <http://www.icmc.usp.br/%7Ercbarros>
e-mail (1): [log in to unmask]
e-mail (2): [log in to unmask]

mobile: +55 16 8138-3627

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