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 <[email protected]> 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 > [email protected] > http://lists.einsteintoolkit.org/mailman/listinfo/users > > -- Erik Schnetter <[email protected]> http://www.perimeterinstitute.ca/personal/eschnetter/
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