[Users] Any 64-bit issues I should be aware of?

[Erik Schnetter]

Ian

Where did you see this list? It is probably very outdated. Cactus (and the
Einstein Toolkit) run virtually everywhere. I would not be surprised if
someone ran it on an Iphone or a Blackberry or on Android, but I don't
recall reading about this yet.

-erik


On Thu, Aug 21, 2014 at 9:19 AM, Ian Smith <the.pond at dsl.pipex.com> wrote:

> On 21/08/14 14:08, Erik Schnetter wrote:
> > Ian
> >
> > We've been running on 64-bit systems since Cactus was designed... I
> > doubt that a 64-bit issue is the problem here.
> >
> > (Historical factoid: This was one of the motivations for introducing
> > CCTK_REAL. The early Cray 64-bit systems defined the "integer" to be 64
> > bit, as one would naively expect. The Fortran standard the requires
> > "single precision" floating point numbers to be 64-bit as well, so that
> > one would want to use "single precision" on such a system, not "double
> > precision" that would have 128 bits and be very slow. So -- CCTK_REAL,
> > which has the same number of bits on all systems.)
> >
> > Yes, we've encountered and dealt segfaults before. Can you give us more
> > information? I recommend you open a bug report on
> > trac.einsteintoolkit.org <http://trac.einsteintoolkit.org> where you can
> > easily attach information, and then attach your option list, parameter
> > file, machine configuration, as well as the exact commands you used to
> > build your executable and run your job.
> >
> > -erik
>
> Hi Erik,
>
> OK, I saw the list of supported architectures and noticed it contains
> IA64 but not AMD64 if I read it correctly.
>
> I'll investigate and see if I can get more debug for you.  In the
> meantime I have a 32-bit machine to run on so I can study the examples
> as well.
>
> Cheers,
>
> Ian.
>
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-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/
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