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Re: Extra swapping when using gfortran 4.3-20061224 vs gfortran 4.2-20061211
- From: Toon Moene <toon at moene dot indiv dot nluug dot nl>
- To: gfortran <fortran at gcc dot gnu dot org>
- Cc: Diego Novillo <dnovillo at redhat dot com>
- Date: Thu, 28 Dec 2006 19:52:36 +0100
- Subject: Re: Extra swapping when using gfortran 4.3-20061224 vs gfortran 4.2-20061211
- Organization: Moene Computational Physics, Maartensdijk, The Netherlands
- References: <45915EAB.7010605@moene.indiv.nluug.nl> <4593E309.4040504@moene.indiv.nluug.nl>
Toon Moene wrote:
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 compiled a key routine using --param max-aliased-vops=1000 (as opposed
to the default 50). The result was much reduced stack usage.
So I'll first try to compile the whole enchilada (oh, it's with one l)
with that option before probing the list again.
Well, this looked promising, but didn't help.
BTW, I had to lower the expectations to max-alias-vops=100
Anything over 100 had the compiler choke (as in SEGFAULT) on one or
another routine.
However, swapping continued ...
--
Toon Moene - e-mail: toon@moene.indiv.nluug.nl - phone: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
A maintainer of GNU Fortran: http://gcc.gnu.org/fortran/
Who's working on GNU Fortran:
http://gcc.gnu.org/ml/gcc/2006-01/msg00000.html