[Beowulf] g77 limits...

Joel Jaeggli joelja at darkwing.uoregon.edu
Wed Feb 22 14:35:52 PST 2006

On Wed, 22 Feb 2006, Kozin, I (Igor) wrote:

>>> archives because it is so time dependent an answer.  In particular, can
>>> an x64 box with a modern linux kernel and a modern g77 allocate 4-8 GB
>> isn't "modern g77" a bit of an oxymoron?
>> (given the existence of gfortran, I mean).
> Oh, I was totally confused by the combination "g77" and "allocate".
> Robert, try g95. Although it is not part of the gnu stream but
> it seems more stable at the moment. It works stand alone.
> Allocating (nearly) 4GB in a single array worked for me
> (unfortunately no more physical memory is available).
> However in terms of performance you may lose considerably
> compared to commercial compilers.

g95 is included as of gcc 4 you can try it out on fc4 if you're so 

[joelja at twin ~]$ gcc -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/usr/share/info --enable-shared --enable-threads=posix 
--enable-checking=release --with-system-zlib --enable-__cxa_atexit 
--disable-libunwind-exceptions --enable-libgcj-multifile 
--enable-languages=c,c++,objc,java,f95,ada --enable-java-awt=gtk 
Thread model: posix
gcc version 4.0.2 20051125 (Red Hat 4.0.2-8)
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Joel Jaeggli  	       Unix Consulting 	       joelja at darkwing.uoregon.edu
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