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Re: [ESPResSo-users] Configuration file for building Espresso with LB

From: Florian Weik
Subject: Re: [ESPResSo-users] Configuration file for building Espresso with LB
Date: Wed, 17 Dec 2014 16:00:31 +0100

all that text is because you have activated all debug options in you myconfig.hpp. This is typically not useful. Neither is activating all those methods that you do not need, this will slow down the code. The error you stated in the body of your email suggests that CUDA libraries were present on the machine you configured and build (otherwise the build would have failed), but you could not run GPU code (which you need if GPU methods are enabled as in your config file, no matter if you actually use them). In principle if you activate a feature it is assumed that you actually use it.

Florian Weik

On Wed, Dec 17, 2014 at 1:48 PM, Edith Euan <address@hidden> wrote:
Dear Axel,

Thanks for your answer, a this is the output for the sample "espresso_logo.tcl"

0: node_grid 1 1 1, pos 0 0 0, node_neighbors  
=              espresso_logo.tcl                      =
cup: bottom_rad 2.38732
handle rad=1.41421 circ=6.66431 beta -0.229935
saucer: r_out=4.77465, r_in=2.38732, rings=3
Parts: total 194, cup 124, saucer 70 (valency -1.77143)
#particles realloc 224 
CUDA error: no CUDA-capable device is detected

Plus, we have a lot text printed on the screen that, indeed, we are not able to understand. Please, find attached the file that contains part of the text. 

Would you be so kind and give us some suggestions to improve our configuration file for a better installation?

Thank you so much in advance.


On Tue, Dec 16, 2014 at 10:50 PM, Axel Arnold <address@hidden> wrote:

On 16.12.2014, at 17:34, Edith Euan <address@hidden> wrote:
Unfortunately, with this configuration file, we are able to compile Espresso without problem, but it doesn't run correctly any test code.

Could you be a bit more specific? What means “doesn’t run correctly”? Which "test code”? The problem is unlikely with the myconfig, since our CI also uses such a maximal set, and it works.

Note that you also enabled all debug output and expensive debug  checks, so you will be flooded with debug output that you will not be able to interpret, but makes your simulation terribly slow.


JP Dr. Axel Arnold
ICP, Universität Stuttgart
Allmandring 3
70569 Stuttgart, Germany
Email: address@hidden
Phone: +49 711 685 67609

Dr. Edith Cristina Euán-Díaz
Postdoctoral Fellow
Condensed Matter Theory Group
University of Antwerp
Groenenborgerlaan 171
BE-2020 Antwerp, Belgium
T: +32 3 265 35 42 3527

Florian Weik, Dipl.-Phys.,
Institut für Computerphysik, Allmandring 3, D-70569 Stuttgart
Phone: +49-711-685-67703
Public Key 0x0562F11D Fingerprint 3294 6360 EC93 37A3 BD40  F597 0BAD 3AF8 0562 F11D

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