[Beowulf] Quick question... on Fortran
Brian Dobbins
brian.dobbins at yale.edu
Thu May 10 11:09:58 PDT 2007
>From one Fortran averse person to another:
Using the PGI compilers (at least as of 6.0, but 7.0 is out now and does
the same), you can allocate at -least- up to 32GB in an array with Fortran
on 64-bit systems. I say at least because I don't currently have more
than 32GB on any of my nodes. :)
The way to do this is to use the 'mcmodel=medium' option and to promote
integers to 8-byte values (for indexing the entries in this array) with
'-i8'.
(For example: 'pgf90 -mcmodel=medium -i8 test.f90 -o test.exe')
Of course, if you want to try this yourself, Robert, I'm happy to let you
log in and give it a shot for the sole pleasure of seeing you touch
Fortran code. ;)
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