Hello all,

this not about reporting a bug, but did anybody notice that in rare
cases the current Intel Fortran compiler (Linux version) uses
exceptional amounts of resources (CPU & memory) as compared to version
7.1?  At the same time the produced object files are significantly
larger.

To be specific: while recompiling LAPACK95 from netlib.org, the
following files all required much more that 10 times the CPU time and
had more than tenfold larger memory footprint while compiling (-O1),
whereas the objects were more than five times larger that with ifc-7.1:

la_cggesx.f90
la_dggesx.f90
la_sggesx.f90
la_zggesx.f90

Does anybody see a reason why this should be so?

-- 
Ciao,
-ha

Yes, and the situations aren't rare. I can't build my program on my old 
Linux box because 750 MBytes of memory, physical and virtual, just 
aren't enough. When I complained, Intel said get more memory, so I'll 
just continue to rely on Lahey.

Norm Clerman
Opcon Associates, Inc.
www.opconassociates.com
norm.opcon@fuse.net

Harald Anlauf wrote:
> Hello all,
> 
> this not about reporting a bug, but did anybody notice that in rare
> cases the current Intel Fortran compiler (Linux version) uses
> exceptional amounts of resources (CPU & memory) as compared to version
> 7.1?  At the same time the produced object files are significantly
> larger.
> 
> To be specific: while recompiling LAPACK95 from netlib.org, the
> following files all required much more that 10 times the CPU time and
> had more than tenfold larger memory footprint while compiling (-O1),
> whereas the objects were more than five times larger that with ifc-7.1:
> 
> la_cggesx.f90
> la_dggesx.f90
> la_sggesx.f90
> la_zggesx.f90
> 
> Does anybody see a reason why this should be so?
> 

On Wed, 17 Dec 2003 15:25:05 -0500, Norman Clerman wrote:
> Yes, and the situations aren't rare. I can't build my program on my old 
> Linux box because 750 MBytes of memory, physical and virtual, just 
> aren't enough. When I complained, Intel said get more memory, so I'll 
> just continue to rely on Lahey.

Which options are you using, and how large is your application?

...Scott

-- 
Scott Robert Ladd
Coyote Gulch Productions (http://www.coyotegulch.com)
Software Invention for High-Performance Computing