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The following grid structure consistency check failed: Synchronisation and boundary prolongation
by Ferguson, Deborah 25 Mar '21

25 Mar '21

I submitted a simulation on Stampede that ran for several days (1024.4 M) before failing with multiple errors of the form: [ml=0 rl=10 c=13] The following grid structure consistency check failed: Synchronisation and boundary prolongation: All points must have been received needrecv.empty() Does anyone know why this may have happened after running for so long? I’ve attached for the most recent output, the .err file, the .out file, the parameter file, grid.asc, and the ShiftTracker files. Let me know if anything else would be useful. Thanks for any thoughts you might have! Best, Deborah -------------------------------------- Deborah Ferguson Post Doc University of Texas at Austin

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Proposed (not implemented) improvement to TerminationTrigger
by Gabriele Bozzola 25 Mar '21

25 Mar '21

Hi, I don't have time to do this myself at the moment, but I think it would be very useful to be able to ask TerminationTrigger to trigger termination at a multiple of a given iteration. The main application for this is ReadInterpolate. I am trying to use the thorn to change some fundamental parameters of the simulation of my ongoing runs. ReadInterpolate requires the checkpoints to be all at the same time. The checkpoints my simulations naturally produce do not fulfill this requirement, so what I have to do is to do a small run with cctk_itlast set to a number I manually have to compute so that all the refinement levels are synced. This is doable, but rather inconvenient to do every time. The change I propose is to introduce a range of "termination times" to TerminationTrigger instead of a single value (on_remaining_walltime). The idea is that as soon as the remaining walltime is less than the lower end of the range, TerminationTrigger will terminate only when the iteration is a multiple of a specified value. If the the high end of the range is reached, than this condition is no longer checked and the termination is triggered immediately (current behavior). Similarly, it would be nice to add a new sentinel value to the termination file. E.g., if I write the number 2 in the termination file, then TerminationTrigger will stop at the first iteration that is multiple of the given value instead of stopping immediately. I think that these changes would be rather simple to implement, and if the default value for "terminate_at_multiple_of" is set to 1, then they would be backwards compatible. At the moment, I cannot implement these changes myself, but I leave the idea here as a suggestion for future improvements. If anyone has a better way to do what I want to do, I'd be happy to hear that. Best, Gabriele

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 24 Mar '21

24 Mar '21

Hello, Please consider joining the weekly Einstein Toolkit phone call at 9:00 am US central time on Thursdays. For details on how to connect and what agenda items are to be discussed, use the link below. ** DAYLIGHT SAVING TIME WARNING ** Please note that the US has already transitioned to / from daylight savings time. The phone call will be at 15:00 Central EU time. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call --The Maintainers

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 22 Mar '21

22 Mar '21

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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CarpetX First Steps
by Erik Schnetter 21 Mar '21

21 Mar '21

Following up on last week's CarpetX tutorial, I have written up instructions for downloading and building CarpetX in the README at <https://bitbucket.org/eschnett/cactusamrex>. -erik -- Erik Schnetter <eschnetter(a)perimeterinstitute.ca> http://www.perimeterinstitute.ca/personal/eschnetter/

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CarpetX tutorial
by Steven Brandt 18 Mar '21

18 Mar '21

Thanks again to Erik for presenting the first official CarpetX tutorial. You can find the recording here: https://lsu.zoom.us/rec/share/YcrCqkVkEZ5BjqZrXQa-vt7EOGyXFL8rD26-GASPOEhSY… Also, inside the cactusamrex repo, there are dockerfiles to create a working CarpetX image. You can find the working image at this location on dockerhub: einsteintoolkit/cactus-amrex-jovyan Invoking "build.sh" inside the image should check out (using GetComponents) and build Cactus with CarpetX. --Steve

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 17 Mar '21

17 Mar '21

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reminder: presentation on CarpetX by Erik Schnetter on March 18th 2021in the ET call slot
by Roland Haas 17 Mar '21

17 Mar '21

Hello all, This Thursday Erik Schnetter will present how to user CarpetX, the next generation mesh refinement driver for the Einstein Toolkit which is based on AMReX. CarpetX is developed as part of the Einstein Toolkit and can be found at: https://bitbucket.org/eschnett/cactusamrex In the interest of time, this presentation will not contain any hands-on parts, however the developers will be available to help interested users setting up CarpetX on their own at a later time. 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://pgp.mit.edu .

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 15 Mar '21

15 Mar '21

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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update LORENE version within ExternalLibraries
by Bruno Giacomazzo 14 Mar '21

14 Mar '21

Hi, the versions of LORENE available within the Einstein Tollkit (both LORENE and LORENE2) are pretty old and they also include a few bugs that have been fixed in the current version of the LORENE library available on https://lorene.obspm.fr/ Would it be possible to add the current version of LORENE to the Einstein Toolkit? I was really happy when LORENE was included within the Einstein Toolkit (it made my life much easier), but unfortunately the version within the Toolkit is not usable anymore, especially when working with tabulated EOS (in particular with the CompOSE format, but not only) and new initial data. In the case of Spritz for example, we have to compile LORENE separately (see the comment on https://zenodo.org/record/4350072) and it is sometimes a bit of a hassle to get it linked correctly with the Cactus executable (especially when moving to new clusters). Thanks, Bruno P.S.: btw, I was not able to find which version of LORENE the thorns LORENE and LORENE2 refer to. I think LORENE2 is from 2015, but I'm not 100% sure. -- Prof. Bruno Giacomazzo Department of Physics University of Milano-Bicocca Piazza della Scienza 3 20126 Milano Italy email: bruno.giacomazzo(a)unimib.it phone: (+39) 02 6448 2321 web: http://www.brunogiacomazzo.org ---------------------------------------------------------------------- There are only 10 types of people in the world: Those who understand binary, and those who don't ----------------------------------------------------------------------

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