Recently I played around with some AMD EPYC cpus and the bad thing is
that I also saw some strange numbers when using libflame/aocl 2.1.
The 'workaround' is probably to just use Intel's MKL. Since version 2020
the MKL performs rather well when using AMD cpus, however, if you want
to get the best performance you have to additionally set:
export MKL_DEBUG_CPU_TYPE=5
which gives an additional 10-20% speedup with MKL 2020, while for
earlier versions the speedup is greater than 200%
Kind regards,
Tobias
On 2/2/20 10:57 PM, Paolo Giannozzi wrote:
On Sun, Feb 2, 2020 at 10:23 PM Evgeny Permyakov <permea...@gmail.com
<mailto:permea...@gmail.com>> wrote:
sidenote: I had to set **orte_execute_quiet = true** in
~/.openmpi/mca-params.conf so mpi didn't mess with extra messages
thank you for this useful piece of information: I got rid of those
annoying messages
I don't use epw in my work and pwscf tests work just fine, but the
fact that some tests failed bother me. Should I investigate it
further and how? I'm not versed in QE code, I'm a humble user.
investigating further would be a good thing, but it is not easy: one
has to figure out which piece of code fails, then why. Even if one
succeeds, very often the problem is in the library itself and there
is nothing that can be done.
Frequent offenders are complex-valued routines (e.g. zdotc) that seem
to follow two different incompatible conventions, but the symptom is a
hard crash, not a wrong number.
Paolo
--
Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222
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--
M.Sc. Tobias Klöffel
=======================================================
HPC (High Performance Computing) group
Erlangen Regional Computing Center(RRZE)
Friedrich-Alexander-Universität Erlangen-Nürnberg
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91058 Erlangen
Room: 1.133
Phone: +49 (0) 9131 / 85 - 20101
=======================================================
E-mail: tobias.kloef...@fau.de
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