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3D output of staggered grid functions
by Michail Chabanov 12 Oct '23

12 Oct '23

Hello, I have a question regarding 3D HDF5 output of staggered grid functions, e.g. the vector potential of IllinoisGRMHD. So far, I have assumed that 3D HDF5 data will just contain the respective grid function where the values are left unchanged from those which are actually used during the evolution. However, I have found some inconsistencies with this assumption in my prost-process calculations where it seems as if the 3D output data actually contains the respective grid function interpolated to the cell vertices. For a staggered function like the vector potential this would change its value from the one actually used in the evolution. So, my question is whether interpolation is used in Carpet for 3D HDF output in order to compute the GFs cell vertices? Thanks in advance and a nice weekend, Michail

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Postdoc at SISSA, Italy
by Enrico Barausse 12 Oct '23

12 Oct '23

Dear Colleagues please find here https://academicjobsonline.org/ajo/jobs/26187 the announcement for a postdoc at SISSA (Trieste, Italy). The search is for a variety of profiles including GW astrophysics and data analysis. Please feel free to forward to any interested parties Best regards Enrico Barausse

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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 11 Oct '23

11 Oct '23

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. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call --The Maintainers

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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 09 Oct '23

09 Oct '23

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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Meudon_Mag_NS parfile output
by Shamim Haque 1910511 09 Oct '23

09 Oct '23

Hello all, I am trying to use the bbig.par parameter file to extract the metric and thermodynamic information for an isolated star ID from Lorene. This parfile is available in Meudon_Mag_NS/par folder. I tried this par file with the given Lorene ID available at Meudon_Mag_NS/data. It is supposed to exit after iter 0 with IO outfiles. However, it does not give the requested outputs upon completion of the simulation. I can see the Lorene information is read correctly in the out file, but I am unable to find out the problem. I need some help with this. I have attached the parfile, outfile and error file for reference. I have not attached the ID; my mail is not passing through to the moderator due to size. Regards Shamim Haque Senior Research Fellow (SRF) Department of Physics IISER Bhopal ᐧ

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Meeting minutes for 2023-10-05
by Leo Rosa Werneck 05 Oct '23

05 Oct '23

Dear all, Here are today’s minutes. Chair : Peter Minutes : Leo Present : Zach, Steve, Sam, Roland, Peter, Leo Release: - Sam: every time a new thorn is added to the thornlist for checkout, the CI testing does not get that thorn, and so Roland or Steve has to manually update the CI. Steve: there are instructions on how to do it somewhere. - SGRID: Liwei is reviewing. - Sam pushed an update to the CarpetX thorns in GRHayL. GRHayL functions still lack the proper declaration of device functions in them, but Sam and Leo will work on that in the near future. - Steve suggests that maybe the CarpetX thorns in GRHayL should be included in the next release instead, as they have not been shown to run on GPUs. Roland said that as long as the code compiles on a GPU build, it should be fine; having GPU support is not a requirement for inclusion. Steve says that even if we get everything compiled and properly declared, it likely that benchmark tests won't have been run, and that is something that we might want done before inclusion. - Seed_Magnetic_Fields: Zach sent a review to Sam. - CarpetX: Steve found some issues, but now has a working cfg file for Deep Bayou, which may be useful for other systems. Unanswered questions on mailing list: - Extract thorn issue: likely needs to activate additional time levels, change the prolongation type, or simply request the output to be generated only when all time levels are aligned. Leo responded. Next chair : Steve Next Minutes : Roland Chair/minutes rotation list, taking effect next week. .---------.--------.---------. | Date | Chair | Minutes | .---------.--------.---------. | 10-12-23 | Steve | Roland | | 10-19-23 | Peter | Steve | | 10-26-23 | Roland | Sam | | 11-02-23 | Sam | Leo | | 11-09-23 | Leo | Roland | | 11-16-23 | Zach | Steve | | ... | ... | ... | .---------.--------.---------. Cheers, Leo ------ Leonardo R. Werneck, Ph.D. Postdoctoral researcher Office EP 314 | Department of Physics | University of Idaho 875 Perimeter Dr. MS 0903 Moscow, ID 83844-0903, USA leonardo(a)uidaho.edu <mailto:leonardo@uidaho.edu> https://leowerneck.github.io <https://leowerneck.github.io/>

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Re: [Users] Users Digest, Vol 163, Issue 1
by Leo Rosa Werneck 05 Oct '23

05 Oct '23

Dear Tomas, It sounds like what is happening is that the grid function in question only has 1 time level, but multiple active refinement levels. Because of sub cycling in time, not all refinement levels will be at the same cctk_time during a simulation. Therefore, if you request, for example, output_every = 1, then the toolkit tries to perform time interpolations when outputting the data (I think). Since the grid function only has 1 time level active, the toolkit can’t do that for the interpolation method selected (likely some default parameter in the thorn), hence the error. The easiest, and likely most useful, way to fix this is to only output data when all time levels are aligned. For example, you can achieve this by requesting to output the data on iterations that are multiple of 2^(max_refinement_levels). Alternatively, you can look at the param.ccl file of the Extract thorn and see if there a way to change the number of active time levels. Hope this helps! Cheers, Leo ------ Leonardo R. Werneck, Ph.D. Postdoctoral researcher Office EP 314 | Department of Physics | University of Idaho 875 Perimeter Dr. MS 0903 Moscow, ID 83844-0903, USA leonardo(a)uidaho.edu <mailto:leonardo@uidaho.edu> https://leowerneck.github.io <https://leowerneck.github.io/> > On Oct 2, 2023, at 3:50 AM, users-request(a)einsteintoolkit.org wrote: > > Send Users mailing list submissions to > users(a)einsteintoolkit.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.einsteintoolkit.org/mailman/listinfo/users > or, via email, send a message with subject or body 'help' to > users-request(a)einsteintoolkit.org > > You can reach the person managing the list at > users-owner(a)einsteintoolkit.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Users digest..." > > > Today's Topics: > > 1. Today: NR community call at 9am Pacific / noon NYC / 5pm > London / 6pm Berlin (Nils Vu) > 2. Einstein Toolkit Meeting Reminder (rhaas(a)illinois.edu) > 3. meeting minutes for 2023-09-28 (Roland Haas) > 4. thorn Extract (Tomas Andrade) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 11 Sep 2023 07:51:34 -0700 > From: Nils Vu <nils.vu(a)black-holes.org> > To: nr-community-call(a)black-holes.org > Subject: [Users] Today: NR community call at 9am Pacific / noon NYC / > 5pm London / 6pm Berlin > Message-ID: <42ED8340-ED86-442E-9231-591AF9B2B619(a)black-holes.org> > Content-Type: text/plain; charset="utf-8" > > ??Dear Numerical Relativists, > > We?ll have our NR community call today, Monday Sep 11, 9am LA / noon NYC / 5pm London / 6pm Berlin in this Zoom room: > > https://caltech.zoom.us/j/87114806411 > > Our speakers today will be Deborah Ferguson (UT Austin / UIUC) and Jaime Redondo Yuste (NBI). > > - Feel free to circulate this information within the NR community. > - Please subscribe to our mailing list <https://groups.google.com/u/1/a/black-holes.org/g/nr-community-call/> to receive info on the community calls in the future (or send a short message to nr-community-call+subscribe(a)black-holes.org <mailto:nr-community-call+subscribe@black-holes.org> to subscribe) and join our Slack <https://join.slack.com/t/generalrelativity/shared_invite/zt-dl4gqb6v-aAuw~p…> for discussions (channel: #nr-community-call <https://generalrelativity.slack.com/archives/C021LLTLK37>). > - Please sign up for a slot <https://docs.google.com/forms/d/e/1FAIpQLSfoCnnCJve7J7Jzrpdlqw7nAbwWS_iuX_e…> in the schedule to speak at one of the community calls: https://github.com/sxs-collaboration/nr-community-call/wiki > > Looking forward to seeing you all later, > Nils > > ? > Nils Vu, Ph.D. (he/him) > Sherman Fairchild Postdoctoral Fellow in Theoretical Astrophysics > California Institute of Technology > >

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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 04 Oct '23

04 Oct '23

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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 02 Oct '23

02 Oct '23

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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thorn Extract
by Tomas Andrade 02 Oct '23

02 Oct '23

Hi all, I'm trying to use the thorn Extract, but I'm encountering an issue with prolongation in Carpet. I can use it successfully (i.e. getting the output files .ul, .tl) with the provided test parfile in repos/einsteinanalysis/Extract/test/qc0-mclachlan.par However this has CarpetRegrid2::num_levels_1 = 1 CarpetRegrid2::num_levels_2 = 1 which is not very useful. If I try to increase the levels to say CarpetRegrid2::num_levels_1 = 2 CarpetRegrid2::num_levels_2 = 2 I get the error ERROR from host lhcb02.icc.ub.edu process 0 while executing schedule bin CCTK_POSTSTEP, routine Extract::Extract in thorn CarpetLib, file /home/tandrade/Cactus/configs/sim/build/CarpetLib/ggf.cc:376: * -> The variable "EXTRACT::temp3d" has only 1 active time levels, which is not enough for boundary prolongation of order 2 * Similarly, if I activate the thorn and request the output using other parfiles for binary black holes, I get a similar warning (not error) and the code produces no output. any advice? thank you! Tomas -- Aquest missatge, i els fitxers adjunts que hi pugui haver, pot contenir informació confidencial o protegida legalment i s’adreça exclusivament a la persona o entitat destinatària. Si no consteu com a destinatari final o no teniu l’encàrrec de rebre’l, no esteu autoritzat a llegir-lo, retenir-lo, modificar-lo, distribuir-lo, copiar-lo ni a revelar-ne el contingut. Si l’heu rebut per error, informeu-ne el remitent i elimineu del sistema tant el missatge com els fitxers adjunts que hi pugui haver. Este mensaje, y los ficheros adjuntos que pueda incluir, puede contener información confidencial o legalmente protegida y está exclusivamente dirigido a la persona o entidad destinataria. Si usted no consta como destinatario final ni es la persona encargada de recibirlo, no está autorizado a leerlo, retenerlo, modificarlo, distribuirlo o copiarlo, ni a revelar su contenido. Si lo ha recibido por error, informe de ello al remitente y elimine del sistema tanto el mensaje como los ficheros adjuntos que pueda contener. This email message and any attachments it carries may contain confidential or legally protected material and are intended solely for the individual or organization to whom they are addressed. If you are not the intended recipient of this message or the person responsible for processing it, then you are not authorized to read, save, modify, send, copy or disclose any part of it. If you have received the message by mistake, please inform the sender of this and eliminate the message and any attachments it carries from your account.

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