Users March 2017

users@lists.einsteintoolkit.org

18 participants
25 discussions

meeting minutes for 2017-03-06
by Roland Haas 07 Mar '17

07 Mar '17

Present: Erik, Roland, Cory Chu, Steve, Bhavesh, 彭兆宏 We quickly discussed the failing tests, and given that the option list used (https://bitbucket.org/ianhinder/cactusjenkins/raw/d7021a52bd83448db589b2346…) is not using -ffast-math or -mmarch=native the working assumption is that the occurrence of the failures is due to to an updated OS and newer compiler. Erik asked if we had a docker container for the Jenkins test slave, which we were not sure (there is a docker image at https://bitbucket.org/ianhinder/et-jenkins-slave though it is not clear if this is the one used). We ended the call early due to lack of topics to discuss. Yours, Roland -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://keys.gnupg.net.

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LORENE BHNS Initial Data
by Gwyneth Allwright 07 Mar '17

07 Mar '17

Hi All, I'm interested in running black-hole-neutron-star binary simulations using the Einstein Toolkit. As far as I understand, the only way to do this would be to use initial data from LORENE. I'm aware that one can use the thorns Meudon_Bin_BH, Meudon_Bin_NS and Meudon_Mag_NS to import data from LORENE for binary black holes, binary neutron stars and magnetized neutron stars respectively. Are there any thorns for black-hole-neutron-star binaries? Thanks, Gwyneth

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Re: [Users] [Commits] meeting minutes for 2017-03-06
by Erik Schnetter 06 Mar '17

06 Mar '17

On Mon, Mar 6, 2017 at 10:55 AM, Roland Haas <rhaas(a)illinois.edu> wrote: > Hello all, > > > We quickly discussed the failing tests, and given that the option list > > used > > (https://bitbucket.org/ianhinder/cactusjenkins/raw/ > d7021a52bd83448db589b2346c43441682eecabb/build.cfg) > > is not using -ffast-math or -mmarch=native the working assumption is > > that the occurrence of the failures is due to to an updated OS and > > newer compiler. Erik asked if we had a docker container for the > > Jenkins test slave, which we were not sure (there is a docker image at > > https://bitbucket.org/ianhinder/et-jenkins-slave though it is not > > clear if this is the one used). > > after the call of course I realized what may cause differences even > without -march=native or -ffast-math: the explicit vectorization in > thorn Vectors depends on the machine architecture so different hardware > (eg AVX2) will produce different vector code and thus different > answers. Though given the thorns affected (GRHydro and > SphericalHarmonicRecon) I doubt that it is the thorn's code itself but > rather eg McLachlan or the fftw library (for the PITTNull code). This > *may* cause differences though a different compiler *will* cause > differences (in particular a different Fortran compiler). That's a good point. -erik -- Erik Schnetter <schnetter(a)cct.lsu.edu> http://www.perimeterinstitute.ca/personal/eschnetter/

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Re: [Users] Einstein Toolkit Meeting Reminder
by Frank Loeffler 06 Mar '17

06 Mar '17

Hi Please consider joining the weekly Einstein Toolkit phone call at 9:30 am US central time on Mondays. As usual, you can find instructions how to join on the following web site: http://einsteintoolkit.org/community/support/ We use a Google hangout, with an URL announced on this list about 15 minutes before the meeting. Topics we'll likely cover include - The current Jenkins status https://build.barrywardell.net/job/EinsteinToolkit/ Frank Loeffler

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slurm
by Francisco Guzman 03 Mar '17

03 Mar '17

Hi all, Does anyone have experience using the queue administrator SLURM when submitting ETK jobs? Particularly important would be to know how specific one has to be at declaring MODULES within the submission-job scripts, which require specific library and tools PATHS. I'd appreciate if someone has a script that works (and can pass it on to me). Regards, Francisco

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Users March 2017