[CIG-SEISMO] specfem3d_globe with CUDA

[Phil Cummins]

Hi again,
I agree with Brad. I had assumed the number following cuda was for the 
version of the CUDA software, and I used cuda6 because it was the 
highest number I had thought was available (our sysadmin told me I need 
to compile with CUDA version 8.0). I have now used the cuda8 option 
because that is the one for my card, but I had exactly the same behavior 
with "make all" - I still had to remove cuda_dev_obj.o and add -lstdc++ 
to the final mpif90 link command.

(still trying to run some of the examples ...)

Regards,

- Phil
> Brad Aagaard <mailto:baagaard at usgs.gov>
> 27 April 2017 at 10:18 AM
>
>
> If --with-cuda=cudaX is tied to a card rather than the CUDA version, 
> why not be explicit and use
>
> --with-cuda=K20
> --with-cuda=K80
> etc.
>
> This would make it much more transparent to the user.
>
> Regards,
> Brad
>
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> Daniel B. Peter <mailto:daniel.peter at kaust.edu.sa>
> 27 April 2017 at 8:10 AM
> Hi Phil, hi all,
>
> thanks for pointing out that the default —with-cuda=cuda which leads 
> to CUDA4 compilation is probably obsolete by now and we should change 
> this default. i’m going to make the changes and fix to the 
> configuration script.
>
> in your case however, i’m not sure why the initial
> ./configure —with-cuda=cuda6
> didn’t work.
>
> first, what are the GPU cards you want to run it on? then choose:
> -for Tesla K20: ./configure —with-cuda=cuda5
> -for Tesla K80: ./configure —with-cuda=cuda6
> -for Maxwell K2200: ./configure —with-cuda=cuda7
> -for Pascal P100: ./configure —with-cuda=cuda8
>
> we use the cuda*** specification as a short flag to point to the 
> specific architecture and optimization. even if you have the 
> cudatoolkit version 8, but want to compile kernels for a Tesla K20 
> card, you would choose —with-cuda=cuda5
>
> best wishes,
> daniel
>
>
>
>
>
>
>
>
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> Piero Lanucara <mailto:p.lanucara at cineca.it>
> 27 April 2017 at 12:26 AM
>
> Hi all
>
> as far as I understand it should work with:
>
> configure.... --with-cuda=cuda5
>
> regards
>
> Piero
>
>
> Il 26/04/2017 16:04, Phil Cummins ha scritto:
>
> -- 
> Piero Lanucara
> CINECA
> SuperComputing Applications and Innovation Department - SCAI
> Phone: +39 06 44486709
> Fax: +39 06 4957083
> Address: CINECA Sede di Roma Via dei Tizii,6/b - 00185 Roma - Italy
> E-mail: p.lanucara at cineca.it
> skype: lpeter175
> site: http://www.hpc.cineca.it
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> Phil Cummins <mailto:phil.cummins at anu.edu.au>
> 27 April 2017 at 12:04 AM
> Hi Dimitri,
>
> Thanks for the kind words, but my approach was just a workaround. I 
> think someone smarter than me should try to fix the Makefile or 
> configure script. I'm still not sure what was wrong with it.
> Good luck!
>
> - Phil
>
>
>
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> Dimitri Komatitsch <mailto:komatitsch at lma.cnrs-mrs.fr>
> 26 April 2017 at 8:54 PM
>
> Hi Phil, Hi all,
>
> Thanks! Let me cc Daniel Peter and Peter Messmer, who are very 
> familiar with the CUDA version. Daniel, would you know how to commit 
> Phil's fix to the official Git version of the code? (and I guess also 
> for SPECFEM3D_Cartesian and for SPECFEM2D?).
>
> Thanks,
> Best wishes,
>
> Dimitri.
>
>
>

-- 

Phil Cummins
Prof. Natural Hazards
Research School of Earth Sciences
Australian National University

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