Users December 2015

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10 participants
9 discussions

Re: [Users] [ET Trac] [Einstein Toolkit] #1326: running loopcontrol on strange number of threads fails
by Erik Schnetter 11 Apr '19

11 Apr '19

Do you have a backtrace? -erik On Sunday, March 22, 2015, Einstein Toolkit < trac-noreply(a)einsteintoolkit.org> wrote: > #1326: running loopcontrol on strange number of threads fails > ------------------------------------+--------------------------------------- > Reporter: rhaas | Owner: > Type: defect | Status: new > Priority: minor | Milestone: > Component: EinsteinToolkit thorn | Version: > Resolution: | Keywords: LoopControl > ------------------------------------+--------------------------------------- > > Comment (by rhaas): > > This still happens even with current (Sun Mar 22 18:46:21 CET 2015) trunk, > though failure looks a bit different now: > {{{ > actus_sim: > /data/rhaas/postdoc/gr/ET_trunk/configs/sim/build/LoopControl/loopcontrol.cc:312: > T {anonymous}::divexact(T, T) [with T = int]: Assertion `i % j == 0' > failed > }}} > > -- > Ticket URL: <https://trac.einsteintoolkit.org/ticket/1326#comment:1> > Einstein Toolkit <http://einsteintoolkit.org> > The Einstein Toolkit > _______________________________________________ > Trac mailing list > Trac(a)einsteintoolkit.org > http://lists.einsteintoolkit.org/mailman/listinfo/trac > -- Erik Schnetter <schnetter(a)cct.lsu.edu> http://www.perimeterinstitute.ca/personal/eschnetter/

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meeting minutes for 2015-08-31
by Roland Haas 11 Apr '16

11 Apr '16

Present: Frank, Roland, Steve, Peter, Matt, Josh, Erik, Zach, Jonah, Elo There will be no ET call next week due to labour day/Thanksgiving weekend in North America. IllnoisGRMHD: * report is with Zach, was send via private email * separate repo is fine, Zach will create a repository * volunteer needed for the compatibility thorn * Zach will move compatibility thorns into same repo as IllinoisGRMHD GetComponents on OSX: * no OSX user has written * Roland will propose a patch simfactory on BeeGFS: * Erik will look into Bruno's proposed patch writing timeseries data into hdf5: * Frank would like to use this for things like the Hamiltonian norm * HDF5 supports extensible datasets, an example on how to use this is the HDF5 output of Multipole SPH in Cactus: * Matt has a more or less working version of SPH on grid background * came out of work at a national lab on generic grid methods * currently linked in a shared objects for mesh handling and nearest neighbour finding * currently writing his thesis, so code is not changing much right now * load balancing through bisection initially then times the RHS and neighbour looked up push particles around * no octree, instead a hierarchical hash * particle to grid data currently uses SPH approximation for Tmunu at gridpoints of Cactus grid * will arrange for time for presentation through mailing list 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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No Einstein Toolkit Meeting
by Frank Loeffler 21 Dec '15

21 Dec '15

Hi, There will not be an Einstein Toolkit meeting today. The next meeting will be on Mon Jan 11th, 2016, at the usual time. Happy holidays, and a joyful new year! Frank Löffler

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Carpet: Domain specification fails
by dumsani 17 Dec '15

17 Dec '15

Hi All, I am working with some piece of code based on a multipatch coordinate system (llama, http://dx.doi.org/10.1103/PhysRevD.83.044045). Currently, I'm interested in doing a test in a cubical kind of domain, that is, without the multipatch system. Closely following the qc0-mclachlan.par parameter file (ET_2014_05), I converted my multipatch parameter file to use the following: Carpet::domain_from_multipatch = "no" Carpet::domain_from_coordbase = yes CartGrid3D::type = "coordbase" Unlike when using a multipatch sysytem, I've had to add the ReflectionSymmetry thorn in my thornlist for running on a cubical grid. The simulation is able to build successfully. But when running, it breaks with the following error from Carpet: cactus/arrangements/Carpet/Carpet/src/SetupGH.cc:1744: void Carpet::get_domain_specification(const cGH*, int, const ivect&, rvect&, rvect&, rvect&): Assertion `not CCTK_IsFunctionAliased ("MultiPatch_GetDomainSpecification")' failed. Looking at the function that fails and a few ideas I got from the user mailing list, my naive thought is that this might possibly be an issue of cctk_lsh vs cctk_ash in Carpet. (e.g. http://lists.einsteintoolkit.org/pipermail/users/2014-October/003849.html). But I'm yet to test this idea. The code I'm working with uses cctk_lsh. I would gladly appreciate help from anyone who could have an idea about this. I'm using ET_2014_05 release of the EinsteinToolkit/Cactus. I have attached my test parameter file for viewing in case it will be useful in diagnosing the problem(s). Thank you in advance for your kind assistance. Regards, Dumsani

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Serious problem with Carpet grids
by Ian Hinder 11 Dec '15

11 Dec '15

Hi, I just created a ticket (https://trac.einsteintoolkit.org/ticket/1846) to describe a problem that Barry Wardell and I found with the current (2015_11) release. It has probably been present for a while, but is not present in the 2014_05 release. This would show up as large grids and memory usage, and low speeds, in simulations with multiple components per refinement level, as Carpet seems to be replacing these components with their containing bbox. There are two simple workarounds described in the ticket. -- Ian Hinder http://members.aei.mpg.de/ianhin

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Re: [Users] [ET Trac] [Einstein Toolkit] #1848: madd not found
by Erik Schnetter 10 Dec '15

10 Dec '15

Can you give details about your system and architecture? What does /proc/cpuinfo say? What are your compiler options? -erik On Thursday, December 10, 2015, Einstein Toolkit < trac-noreply(a)einsteintoolkit.org> wrote: > #1848: madd not found > ---------------------+------------------------------------------------------ > Reporter: sbrandt | Owner: > Type: defect | Status: new > Priority: unset | Milestone: > Component: Other | Version: development version > Keywords: | > ---------------------+------------------------------------------------------ > I get numerous errors of the form > > /home/sbrandt/cactus/CactusFW/arrangements/Carpet/CarpetLib/src/prolongate_3d_rf2.cc:249:26: > error: ‘madd’ is not a member of ‘VP {aka vecprops<double>}’ > > when trying to compile on my laptop usign gcc 5.1.1 > > -- > Ticket URL: <https://trac.einsteintoolkit.org/ticket/1848> > Einstein Toolkit <http://einsteintoolkit.org> > The Einstein Toolkit > _______________________________________________ > Trac mailing list > Trac(a)einsteintoolkit.org > http://lists.einsteintoolkit.org/mailman/listinfo/trac > -- Erik Schnetter <schnetter(a)gmail.com> http://www.perimeterinstitute.ca/personal/eschnetter/

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Co-Design Summer School 2016: first announcement
by Oleg Korobkin 07 Dec '15

07 Dec '15

Dear all, I would like to advertise the Co-Design Summer School which will take place at Los Alamos, NM next summer, sometimes from mid-May to mid-September 2016 (exact dates TBD). The Los Alamos ISTI/ASC Co-Design Summer School will bring together top graduate students in the fields of physics, computational science and mathematics. A team of six participants will work together on solving a problem that is designed to build the skills needed to tackle the grand challenges of the future. Foremost among the skills on which we focus is the ability of students to work across disciplines with other team members, while employing their own unique expertise. This is the heart of Co-Design. The scientific challenge of choice for this year is modeling neutron star mergers and their kilonovae -- supernova-like transients that accompany these dramatic cosmic cataclisms. Please consult the following website for more information about the school, the challenge and how to apply: http://losalamos.github.io/cdss/index.html Graduate students in the fields of astrophysics, computational code design and mathematics of general relativity are encouraged to apply. Application deadline is February 2016. Please share with anyone who might be interested. Best regards, - Oleg Korobkin --- Postdoctoral Researcher Los Alamos National Lab 505-695-8489 (c) 505-665-9692 (w)

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Einstein Toolkit Meeting Reminder
by Frank Loeffler 06 Dec '15

06 Dec '15

Hi Please consider joining the weekly Einstein Toolkit phone call at 10 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/ I short: the number is (+1) 225-578-4942 and the conference id is 118682#. Frank Löffler

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Einstein Toolkit Meeting Reminder
by Frank Loeffler 03 Dec '15

03 Dec '15

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Users December 2015