Re: [scipion-users] scipion-installer - how do i change compiler optimization flags?

[Pablo C. <pc...@cn...>]

Thanks wolfgang!

Nice piece for xmipp documentation.

On 19/11/20 12:05, Lugmayr, Wolfgang wrote:
> dear all,
>
> just for documentation of the scipion 3.0.6 official release.
>
> i changed in xmipp.conf the line:
> CXXFLAGS= -mtune=native -march=native -std=c++11 -O3
> to
> CXXFLAGS= -mfma -mavx2 -m3dnow -fomit-frame-pointer -std=c++11 -O3
> and rebuild xmipp.
> now the exes run fine on intel and amd epyc processors.
>
> the flags come from recommended for gcc:
> https://prace-ri.eu/wp-content/uploads/Best-Practice-Guide_AMD.pdf
>
> cheers and thanks for the help,
> wolfgang
>
>
> ------------------------------------------------------------------------
> *From: *"Carlos Oscar Sorzano" <co...@cn...>
> *To: *"Pablo Conesa" <pc...@cn...>, "David" 
> <dst...@cn...>, dma...@cn..., "w lugmayr" 
> <w.l...@uk...>, "Mailing list for Scipion users" 
> <sci...@li...>
> *Sent: *Thursday, 29 October, 2020 16:11:16
> *Subject: *Re: Fwd: [scipion-users] scipion-installer - how do i 
> change compiler optimization flags?
>
> Dear Wolfgang,
>
> in the compilation of Xmipp, you can set the environment variable 
> CXXFLAGS before calling the xmipp script. From the Scipion 
> installation I am not sure how to pass it to the xmipp script. It may 
> be that setting it in the shell before calling scipion suffices. But I 
> have never tried.
>
> Kind regards, Carlos Oscar
>
> El 29/10/2020 a las 11:13, Pablo Conesa escribió:
>
>     ?
>
>
>
>     -------- Forwarded Message --------
>     Subject: 	[scipion-users] scipion-installer - how do i change
>     compiler optimization flags?
>     Date: 	Wed, 28 Oct 2020 14:19:29 +0100 (CET)
>     From: 	Lugmayr, Wolfgang <w.l...@uk...> <mailto:w.l...@uk...>
>     Reply-To: 	Mailing list for Scipion users
>     <sci...@li...>
>     <mailto:sci...@li...>
>     To: 	Mailing list for Scipion users
>     <sci...@li...>
>     <mailto:sci...@li...>
>
>
>
>     hi,
>
>     i installed and compiled scipion 3.0.5-devel on a system with
>     intel cpus.
>
>     when i run now scipion on new nodes with "AMD EPYC 7402"
>     processors the executable fails with:
>     $ scipion3 last Scipion v3.0.5 () devel
>     sh: line 1: 45875 Illegal instruction python -m scipion last
>
>     so i do not want to have 2 versions of scipion3 but maybe compile
>     it with intel and amd compatibility flags.
>     how do i set these flags?
>
>     cheers,
>     wolfgang
>
>     -- 
>     Universitätsklinikum Hamburg-Eppendorf (UKE)
>     @ Centre for Structral Systems Biology (CSSB)
>     @ Deutsches Elektronen-Synchrotron (DESY)
>     Notkestrasse 85 Gebäude 15
>     22607 Hamburg, Germany
>     Tel.: +49 40 8998-87652
>     Email:wol...@cs...  <mailto:wol...@cs...>
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>
>
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-- 
Pablo Conesa - *Madrid Scipion <http://scipion.i2pc.es> team*