[MITgcm-devel] [MITgcm-cvs] MITgcm/tools/build_options CVS Commit

[Constantinos Evangelinos]

On Saturday 24 April 2010 07:42:55 pm Jean-Michel Campin wrote:
> Hi Dimitris,
> 
> I think that if your modified optfile degrade the results of
> the 2+2 test, it's better to go back and leave the new option
> commented: the reason is that it's quiet nice to be able
> to restart exactly, and if it's no longer the case, it could
> disturb other users. I personally don't run the 2+2 test very
> often (apart from the standard verification tests), and it might
> take them some time to realize that they lost this capability.

So essentially we have an option (-mp) that works but is not going to be there 
in the Intel 12.0 compilers while its suggested equivalent option (-fp-model 
precise) is producing underflows in the EVP solver slowing it down immensely 
and at the same time a modification to -fp-model precise to avoid the 
underflows (-ftz) breaks the restart... What a mess. 

Constantinos
-- 
Dr. Constantinos Evangelinos
Department of Earth, Atmospheric and Planetary Sciences
Massachusetts Institute of Technology