Re: Help my confusion with march/mtune and AMD/Intel

2025-06-23 Thread Richard Biener
On Sun, Jun 22, 2025 at 10:24 PM Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] wrote: > All, > > > > I'm currently a bit confused and I'm hoping the gfortran gurus can help. > > > > To wit, I have a code on a system with both AMD EPYC (Milan) and Intel > Cascade Lake nodes. Th

Help my confusion with march/mtune and AMD/Intel

2025-06-22 Thread Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC]
All, I'm currently a bit confused and I'm hoping the gfortran gurus can help. To wit, I have a code on a system with both AMD EPYC (Milan) and Intel Cascade Lake nodes. The code in question I build on the Milans with either our "Release" flags: Fortran_FLAGS = -O3 -march=znver2 -mtune=generic