[Info-vax] problems allocating "large" arrays in OpenVMS-Fortran

[Simon Clubley]

On 2013-10-29, Joukj <joukj at hrem.nano.tudelft.nl> wrote:
> Stephen Hoffman wrote:
>> If the ATTRIBUTES ADDRESS64 mechanism isn't working with the Fortran 
>> compiler for Itanium, then you're left with a support call to HP if 
>> you're on the latest Fortran, or working around the limitation somehow 
>> if there's no HP support access available.  (Fortran has its own and 
>> rather unique take on pointers, just to keep all of this stuff 
>> interesting, too.)
>> 
> Unfortunately I do not have a service contract. However, I submitted the 
> problem this morning "unofficially" to engineering.
>
> In the mean time I figured out that for 1-dimensional arrays, I can use 
> Dec-Pointers and LIB$GET_VM_64.
>
> I have no idea how to get multt-dimensional arrays working without much 
> code-change.
>

Did you try running SDA as I suggested to see where the memory is being
allocated to within the virtual address space when using the builtin
Fortran intrinsic ?

It would be interesting to see if it's P0 space or not.

Alternatively, are there any intrinsics or other facilities within
Fortran to see the base address of the allocated memory ?

(Making sure of course they return the base address of the memory and
not the address of some descriptor describing that memory.)

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world