Difference -i4 and -i8 ?
Posted: Tue Aug 01, 2006 8:48 am
Hi,
i compiled the parallel version with -i4 (opteron 64bit, portland compiler, mpich2) since I cant get it to work with -i8. The reason might be that we only have the pgf90, pgf77 and not the c-Compiler and i havent figured out what the equivalent switch to -i8 is with the gcc.
MY QUESTION IS:
Whats the difference between vasp compiled with -i4 or -i8?
Are there advantages or disadvantages with respect to -i4?
Thanks for your advice.
i compiled the parallel version with -i4 (opteron 64bit, portland compiler, mpich2) since I cant get it to work with -i8. The reason might be that we only have the pgf90, pgf77 and not the c-Compiler and i havent figured out what the equivalent switch to -i8 is with the gcc.
MY QUESTION IS:
Whats the difference between vasp compiled with -i4 or -i8?
Are there advantages or disadvantages with respect to -i4?
Thanks for your advice.