[CP2K-user] [CP2K:11694] How do I make use of this HINT?

Tiziano Müller tiziano... at chem.uzh.ch
Fri May 10 07:55:05 UTC 2019

Hi David,

this means that when building CP2K you could have added specific 
compiler flags to optimize the generated code for the target CPU.

Based on [1] it seems that the Intel compiler only enables support for 
SSE2 by default (independently of the optimization level).

If you need the CP2K executable to be a universal binary running on 
different CPUs then there is not much you can do here. If you can limit 
it to specific CPUs, then you probably should add matching optimization 
options, using the flags documented in [1].

If you already have `-xHost` in your flags, then you might use a CPU 
with a smaller instruction set when building compared to when running CP2K.

Hope that helps,
best regards,


On 08.05.19 20:16, David Gunter wrote:
> I compiled cp2k with the Intel 2018 compiler and using Intel MPI. When I 
> run the code, I get this message:
> HINT in environment.F:804 The compiler target flags used to build this 
> binary are insufficiently exploiting the extensions which are available 
> for this CPU model.
> What do I need to do?
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Tiziano Müller
University of Zurich
Department of Chemistry
Winterthurerstrasse 190
CH-8057 Zürich

Tel: +41 44 63 54234
tiziano... at chem.uzh.ch

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