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

[Ian Smith]

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.