On Tue, 3 Mar 2009, Carlo Nervi wrote: CN> Dear Lorenzo, CN> thank you very much for quick reply. CN> Indeed you perfectly get the problem. CN> I still have some difficulties, (how to correctly set the flags for SMP CN> parallel compilation - no MPI, even though I have MPI installed) but I'm CN> working on them. CN> Indeed I have a 8 CPU SMP linux (no cluster, a simple single dual socket CN> xeon MB).
you still want to run MPI on it. it is much more efficient in all but a few strange corner cases, and you want to make certain that OpenMP is disabled in that case. axel. CN> CN> Thank you again, CN> Carlo CN> CN> Lorenzo Paulatto ha scritto: CN> > On Tue, 03 Mar 2009 15:44:12 +0100, Carlo Nervi <carlo.nervi at unito.it> wrote: CN> >> When I type make all, ifort compile all, but it exit with the following CN> >> message: CN> >> ipo: warning #11041: unresolved iotk_print_kinds_x_ CN> >> Referenced in /tmp/ipo_ifort86WxDo.o CN> > CN> > Dear carlo, CN> > QE configure script uses the default system archiver (ar) when using ifort compiler instead of intel's own wrapper (xiar); unluckily interprocedural optimization (IPO) does not work with ar. CN> > CN> > You have two possible solutions: CN> > 1. disable IPO (by setting the -noipo in F90FLAGS in file make.sys) CN> > 2. use xiar instead of ar (by setting the AR variable to xiar in file make.sys) CN> > CN> > Personally I don't think IPO gives a substantial performance increase, hence I just disable it most of the time (furthermore it's disabled by default on most ifort versions). CN> > CN> > cheers CN> > CN> > CN> CN> CN> -- ======================================================================= Axel Kohlmeyer akohlmey at cmm.chem.upenn.edu http://www.cmm.upenn.edu Center for Molecular Modeling -- University of Pennsylvania Department of Chemistry, 231 S.34th Street, Philadelphia, PA 19104-6323 tel: 1-215-898-1582, fax: 1-215-573-6233, office-tel: 1-215-898-5425 ======================================================================= If you make something idiot-proof, the universe creates a better idiot.
