[Users] intel compiler flags?

[Erik Schnetter]

Roland, I think you have been using such flags. Which flags exactly did you
use?

-erik

On Tue, Nov 10, 2015 at 1:45 PM, Frank Loeffler <knarf at cct.lsu.edu> wrote:

> On Tue, Nov 10, 2015 at 01:38:08PM -0500, Jonah Miller wrote:
> > I am working on developing a modified stencil for the Einstein Toolkit
> > and I am discovering that regression tests pass when I use the GNU
> > compilers but fail when I use the Intel compilers, even with gentle
> > optimization settings such as -O1. I suspect over-zealous optimization.
> > Has anyone encountered this sort of problem before? And if so, does
> > anybody know a good combination of flags that makes the intel compiler
> > more cautious, without sacrificing too much speed? (For example,
> > disabling fast math, which seems to be set to active by default.)
>
> The default for the Intel compiler is non-exact math. Try some of the
> options mentioned here:
>
>
> https://software.intel.com/en-us/articles/consistency-of-floating-point-results-using-the-intel-compiler
>
> How much that influences effective speed likely depends a lot on your
> code.
>
> Frank
>
>
> _______________________________________________
> Users mailing list
> Users at einsteintoolkit.org
> http://lists.einsteintoolkit.org/mailman/listinfo/users
>
>


-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.einsteintoolkit.org/pipermail/users/attachments/20151110/de3026c9/attachment.html