Extra swapping when using gfortran 4.3-20061224 vs gfortran 4.2-20061211

[Steve Kargl]

On Tue, Dec 26, 2006 at 06:40:59PM +0100, Toon Moene wrote:
> A run of HIRLAM for which the grid was carefully tuned (half a year ago) 
> to the RAM size of my laptop suddenly started to swap two weeks ago when 
> using gfortran 4.3 as the compiler.
> 

I'm not aware of anything that would do this.  In fact, 
Roger Sayle committed a few changes that may reduce
memory usage.  Richi did some work on the memory allocation,
but I doubt that that would effect HIRLAM.  There's the
commit by Richi and Diego on the 2006-12-14.  It was  my
impression that a smaller value for MAX_ALIASED_VOPS causes
a compile time issue not runtime.

On the library side, the two suspects are Thomas Koenig's
patches on 2006-12-01 and 2006-12-06.  I would guess that
the first patch could have increased the memory usage.

-- 
Steve