The ABINIT Users Mailing List ( CLOSED )

["Javier Lopez" <sklnw@hotmail.com>]

Thanks for the advice. Just two questions:
i)Is the problem related to the use of the -xW flag? Ie, is the problem 
still present with only sse-1 optmizations, -xK? This is my main concern, 
since I've used IFC7.1 with -O3 -xK to compile abinit for some AthlonMP dual 
machines. (If you haven't tested it, maybe I can if you send me the .in and 
other necessary files)
ii)Which version of the IFC is used to compile the binaries distributed at 
abinit.org?
Thanks in advance!

Javier Lopez


> From: Xavier Gonze <gonze@pcpm.ucl.ac.be>
> Reply-To: forum@abinit.org
> To: forum@abinit.org
> Subject: [abinit-forum] Intel compiler v7.0
> Date: Fri, 25 Apr 2003 16:32:41 +0200
>
> Dear all,
>
> You might remember some discussion in the Forum mailing list,
> about the Intel Fortran Compiler v7.0 for PCs ,
> that unlike  previous versions, was causing some problems.
> Michel Cote had succeeded to produce something that worked (thanks again 
> !).
>
> However, more systematic tests have shown that, beyond standard
> Ground-state calculations, there are still serious problems with this
> compiler ! (e.g some response function calculations
> as well as stresses with spin-orbit, gives
> sometimes numerically wrong results - a few percent ! - , without any 
> notice).
> The understanding of these problems has advanced (for example,
> only the lowest optimized level of compilation treats correctly
> the use of array segments as arguments of subroutines), but
> at present, I strongly suggest people NOT to use IFCv7.0 .
> (Use IFCv5 or v6, or the PGI compiler).
>
> By the way, Bernard van Renterghem told me that IFCv7.1 was made
> available a few days ago. It should be tested ...
>
> (Hoping you did not spend months of CPU doing response-function
> calculations using ABINIT with IFCv70 ;-)
> Xavier

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