Users October 2023

users@lists.einsteintoolkit.org

17 participants
25 discussions

Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 18 Oct '23

18 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 16 Oct '23

16 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 16 Oct '23

16 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. 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, ID, outfile and error file for reference. Regards Shamim Haque Senior Research Fellow (SRF) Department of Physics IISER Bhopal ᐧ

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meeting minutes for 2023-10-12
by Roland Haas 12 Oct '23

12 Oct '23

Present: Roland, Steve, Peter, Zach Testsuites ========== * Steve compiled code with nvcc and finds that some code tries to use GPU outside of CarpetX and fails * need to verify on different machines * this can be a blocker for the release, needs to be sorted out ET release ========== * not updates from GRHayL * SeedMagneticField is in master, no further updates * Lucas is working on CarpetX documentation in branch and documentation.tex ** CarpetX still contains what looks like dead code, hard to tell what is what though. ** would also need tests on AMD GPU system. Only Forntier system uses AMD GPUs right now. Maybe solicit help from RIT who is using Frontier CarpetX release =============== * worry of not yet fully at quality for ET due to incomplete review * would favor inclusion as "preview" in release with caveat that API may change ** would want to include to keep up momentum of using CarpetX * current only "science" doable with stock CarpetX included in toolkit is the WaveToy (SpaceTimeX and AsterX are not part of the release) ET size ======= Steve brought up large size and time used to compile the full Einstein Toolkit. Suggests using MakeThornList script to compile only what is needed for parameter file instead of compiling the full toolkit all the time. * Zach agrees that default workflow should migrate that way * this would not compile many of the more experimental code (eg CarpetX) for most users and reduce compilation issues * Steve suggests to, by default, run MakeThornList on some typical parfiles to produce a "typical" thornlist to compile * discussed what the exemplar parfiles should be: vacuum, hydro, Canuda * want "desktop sized" and "cluster sized" parfiles * also update tutorial notebooks Unanswered email ================ * https://lists.einsteintoolkit.org/pipermail/users/2023-October/009083.html Zach will respond. Looks like out of memory on a personal laptop. * https://lists.einsteintoolkit.org/pipermail/users/2023-October/009086.html Roland will respond. The vtk files are not included the small data available on Zenodo (says so in the website as well) nor produced by default by the GW150914.rpar file. To produce them one has to update the rpar file Open tickets ============ * https://bitbucket.org/einsteintoolkit/tickets/issues/2759 twopunctures-swap_xz-results-in-left Zach provided some more details on the issue described in the ticket. Should have actually rotated coordinates instead of swapping. Steve requests a pull request with documentation warning and call to CCTK_VINFO in the code. Roland argues against using CCTK_VWARN (one output per MPI rank). Galley runners ============== claimed: BBH, TOV: Steve unclaimed: BNS, Scalar Wave, Poisson Equation 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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Bugs on window system
by 高毕凯 12 Oct '23

12 Oct '23

Dear einsteintoolkit developers I am facing this problem and do not know how to fix it. There seems to have two bugs here, please help me. Thank you so much! Sincerely yours Jeremy Gao

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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

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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

1 0

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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Users October 2023