[Cbc] Parllel computations with CBC

[Tobias Stengel]

Are you sure that CBC is already branching when look for the CPU utilization?
Processing of the root node i.e. solving the root relaxation is single threaded and can take quite some time depending on the model.


________________________________
Von: Cbc [cbc-bounces at coin-or.org]" im Auftrag von ""Büsing, Henrik" [h.buesing at fz-juelich.de]
Gesendet: Donnerstag, 19. September 2019 11:21
An: cbc at list.coin-or.org
Betreff: [Cbc] Parllel computations with CBC

Dear all,

I am trying to run CBC in parallel. I did a

../coinbrew fetch Cbc
../coinbrew build Cbc --enable-cbc-parallel --prefix=/work/user/METIS/Cbc/build/build_parallel/ --test

and then run

cbc -threads 16 -import model.mps –solve

Cbc responds with

“threads was changed from 0 to 16”

but I do not see any CPU utilization on more than one core.

Any ideas on how I could check, I did everything right?

Thank you for your help!
Henrik Büsing


--
Dipl.-Math. Henrik Büsing
Jülich Supercomputing Centre
Institute for Advanced Simulation

Forschungszentrum Jülich
Wilhelm-Johnen-Straße
52425 Jülich, Germany

Phone:  +49-2461-61-9884
Fax:    +49-2461-61-6656
E-Mail: H.Buesing at fz-juelich.de
WWW:    http://www.fz-juelich.de/ias/jsc
-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
Forschungszentrum Juelich GmbH
52425 Juelich
Sitz der Gesellschaft: Juelich
Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
Vorsitzender des Aufsichtsrats: MinDir Volker Rieke
Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender),
Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
Prof. Dr. Sebastian M. Schmidt
-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/cbc/attachments/20190919/33301b6b/attachment-0001.html>