Users January 2025

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6 participants
15 discussions

libopenPMD missing, OpenPMD question
by Bill Gabella 31 Jan '25

31 Jan '25

Okay ran into a problem with "HelloWorld" with Simfactory when checking my ET install of master: ./simfactory/bin/sim create-run helloworld --parfile arrangements/CactusExamples/HelloWorld/par/HelloWorld.par [lots of stuff] /scratch/gabella/simulations/helloworld/SIMFACTORY/exe/cactus_sim: error while loading shared libraries: libopenPMD.so: cannot open shared object file: No such file or directory I see that that carpetX seems to have OpenPMD readers, etc. I also found the github, if it is the right OpenPMD at https://github.com/openPMD/openPMD-api but expected ET to handle this or to see some text about installing OpenPMD as a pre-req. Any suggestions? I never saw a file format that I did not like, or at least install, so should I install this, or should ET? thanks, bill e.g. ps--Did a find and there is no libopenPMD.so under Cactus.

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meeting minutes for 2025-01-30
by Roland Haas 30 Jan '25

30 Jan '25

Present: Roland, Erik, Bill, Peter, Steve, Lucas, Zach reproducibility issues of data in BNS simulation ================================================ * Zach reports that IllinoisGRMHD also runs con2prim in post-recover variables * reports are that results depend on number of MPI ranks, maybe in IllinoisGRMHD or DNSData (SGRID) reader * Roland now has access to initial data files and code used, will test if initial data is read in differently on different MPI ranks and if checkpoint recovery is bit identical upcoming ET possible inclusions =============================== * Z4c, high priority ** test cases required ** https://bitbucket.org/einsteintoolkit/tickets/issues/2748/inclusion-of-z4c-… * BHaHAHA horizon finder ** timeline will depend on workload for APS April meeting ** so far code is closed source and cannot yet be reviewed ** volunteers for reviewer are looked for, Peter may volunteer ** https://bitbucket.org/einsteintoolkit/tickets/issues/2850/add-bhahaha-to-ei… * CCE code to hook up to Spectre ** work is restarting in earnest this week ** no ticket yet * possibly more modules for FLRWSolver ** Hayley is interested and has been provided with a timeline and will have items ready for initial review early March * gallery example for Canuda (Axi-dilaton) ** Lucas completed the review, currently online at: http://einsteintoolkit.org/gallery/axidilaton/index.html ** example is complete * gallery examples for Canuda, Fishbone-Moncrief, IllinoisGRMHD ** TBD 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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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 29 Jan '25

29 Jan '25

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 27 Jan '25

27 Jan '25

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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Announcement: Caltech Relativistic Astrophysics Summer School 2025
by Most, Elias R. 23 Jan '25

23 Jan '25

Dear all, We are pleased to announce the Caltech Relativistic Astrophysics Summer School 2025, which will take place in Pasadena, CA from June 23-27, 2025. https://relastro-school-2025.caltech.edu<https://relastro-school-2025.caltech.edu/> High-energy astrophysics has made remarkable progress in describing some of the most extreme phenomena in the universe. Recent discoveries such as compact binary mergers and multi-messenger gravitational wave events, fast radio bursts, ultra-high energy cosmic rays, and advances in our understanding of the transient high energy sky (radio, X-ray, gamma-ray) open up new possibilities for forefront research in these rapidly evolving fields. This summer school aims to provide beginning and advanced graduate students in astrophysics, physics, and adjacent fields with the knowledge and tools to fully take advantage of these exciting developments. A particular focus of the school will be the application of emerging computational tools to provide high-fidelity models of high-energy astrophysical phenomena in strong gravity environments, e.g., around black holes or neutron stars. The one-week long summer school will include lectures on a broad range of topics: * Black hole astrophysics * Dynamo and turbulence * Magnetohydrodynamics * Multi-messenger gravitational wave events * Neutrino astrophysics * Neutron star magnetospheres * Numerical Relativity * Plasma kinetics Applications are open now. To receive full consideration, applications should be submitted by April 1, 2025. Partial financial support is available on a request basis. For the organizers, Elias R. Most, Sasha Philippov

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Meeting minutes for 2025-01-23
by Leo Rosa Werneck 23 Jan '25

23 Jan '25

Hi all, Here are the minutes for today’s meeting. Chair: Lucas Minutes: Leo Present: Johnny, Leo, Lucas, Roland, Steve, Zach * Reproducibility of Data from Binary Neutron Star Simulations - Roland sees binary differences in Space Mask when comparing BNS gallery example with different MPI ranks, but otherwise they seem identical. - Observes issues in the post-merger, but inspiral looks the same. - Option MoL::run_MoL_PostStep_in_Post_Recover_Variables = "no" should make checkpoints bitwise identical. * Possible ET Inclusions - Z4c: no updates. - BHaHAHAH: needs reviewer. - CCE code to hook up with Specter: needs reviewer. - Updated FLRWSolver thorn: needs reviewer. - New gallery examples: need champions and reviewers. Leo will work on IllinoisGRMHD's and GRHayL's with David's help. * Unanswered Questions on the Mailing List None. * Open Tickets - #2282: Erik pointed out a potential double-counting issue, but Zach says that, upon reviewing, there should be no issue because the code assumes cell centering instead of vertex centering. Zach is opposed to using higher order integration methods on potentially noisy data. * Tickets Ready for Review - #2776: this helps on macOS using the system installed zlib. - #2364: avoid opening and closing HDF5 files multiple times during output. - #2846: added PreSync support in regrid. - #2842: Silo captures incorrect LIBS values on second CST run. - #2845: support (again) filesystem in std::experimental in Silo output. - #2843: update FFTW3 to 3.3.10. - #2821: update PETSc to 3.21.5. - #2841: update GSL tar file to version 2.8. - #2840: supplement rather than supersede auto-guessed data with gsl-config. - #2839: look for multiple flavors of hdf5 library names (Leo will look). * Lucas is experiencing an issue in CarpetX, but with suggestions form Steve and Roland he has a good idea of how to fix it. Next Chair: Peter Next Minutes: Roland 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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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 22 Jan '25

22 Jan '25

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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 20 Jan '25

20 Jan '25

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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Meeting minutes for 2025-01-16
by Lucas Timotheo Sanches 18 Jan '25

18 Jan '25

Present: Lucas (Minutes), Steven R Brandt, Johnny Tsao, Maxwell Rizzo, Roland Hass (Chair), Erik Schnetter. # Vote to change the cadence of Einstein Toolkit releases. * After intense discussions it was decided (by the voting of those who were present) that the releases shall now be **every 12 months, every May** * It was agreed that this decision may be revisited in the future, in case the community finds it necessary. # Discussions on minor releases and continuous integration * The change of cadence prompted intense discussions on whether we should do point releases with important bug fixes in between releases. Several points were proposed, in particular the following ideas were proposed 1. Do not perform point releases, as this would be equivalent to having two releases a year. 2. Leave the decision to do point releases to the current release manager. 3. Adopt a CI (continuous integration) scheme that would allow us to know if any of the changes on the master branch are breaking in the machines that we support. 4. In order to ameliorate difficulties of running tests (even if automated) on certain machines, it was proposed that we adopt a system of champions and tiers. Each machine would have a champion, responsible for making sure that the ETK works correctly on that system. These would be Tier 1 machines, with full support and working guarantees. Other machines, where champions were out of touch or unable to get the toolkit working in time, would be called Tier 2 machines. * Erik suggested that we postpone this discussion for the next meetings, as the topic is broad and requires more thought. All members agreed. # Reproducibility issues with BNS * Wolfgang Tichy has obtained different results with different MPI ranks on BNS runs and reported them to Roland. Roland also did a bit of testing with the BNS gallery example, writing checkpoints at iteration 0 and 1. He sees differences between runs with 4 and 8 MPI ranks. Zach reminded Roland that Newton's method exhibits chaotic behavior, which his group observed on Illinois GMHD and may explain the results. Erik countered the argument saying we should assume that a bug is more likely. Roland says he needs to perform more tests, but he suspects that boundary condition interactions may be causing the problems. Zach suggested that Roland determines if the hydro quantities change before the metric changes, as hydro changes would take some time to propagate to metric components. Erik suggested checking different time levels. Erik also suggests comparing RHSs. Finally, Zach recommends trying running it through Valgrind, to check accidental memory issues. Roland took note of all suggestions and will implement them. # Upcoming Einstein Toolkit Release * NewRadX: Even though the code is completed, it still needs reviews and patches to be approved. * Z4C: Pending review by reviewers. * Cauchy characteristic extraction for Spectre CCE: Deborah Ferguson, who is the champion of this code, says that work on it is on her agenda but she is currently busy finishing a paper for her group. * Cosmology codes: Roland has reached out to Hayley Macpherson to see if she has any code that she would like to include. She has not reached back yet. * Gallery examples for more modules in the ETK: Roland reports that there are two such examples in the works based on Canuda for evolving the Einstein + various fields systems. Roland reports summer student projects for new gallery examples may not happen as the summer student budget was cut. # Unanswered question on the mailing list No questions. # Open tickets sorted by update time 2845: Small change for fixing C++ namespaces. 2837: Help request with not much progress since last week. # Tickets ready for review * Roland requests for reviewers, particularly those interested in CarpetX, to help on the review of the first few tickets such as 2845, which are relatively small and easy to review.

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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 15 Jan '25

15 Jan '25

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