Users

users@lists.einsteintoolkit.org

3 participants
3984 discussions

Meeting Minutes for 2023-10-26
by Cupp, Samuel D. 26 Oct '23

26 Oct '23

Present: Sam, Peter, Roland, Steve, Zach, Leo GRHayLHDX test failing on Anvil due to segfault running on cpu a ticket would be helpful Testsuite shouldn't hang once a test fails Try removing GRHayLHDX and see if other tests fail Gallery runners: Deborah might do BBH, Steve will switch to BNS Request came in July for contribution to Springer book on GRMHD codes in ET, but it was never discussed People representing several codes (GR-Athena, SPHINCS BSSN, KHARMA) have agreed to contribute other sections to this book GRHydro (Steve?) and IllinoisGRMHD (Sam, Leo) would be in an ET section; should also discuss the spacetime codes (ML_BSSN, Baikal) Unanswered emails: Help with GW150914 Black Hole simulation Problem: vtk files are missing in simulation output Gallery example sets vtk output to behave the same as 3D output, but 3D output is disabled. Tickets: kuibit currently has an issue with the most recent version of tikzplotlib. It appears to be a bug with that package and not kuibit itself; Gabriele is working on a workaround #963 Peter implemented Zach's ML_BSSN improvements into SPHINCS BSSN, and it appears to have significant reduction of constraint violations (still running) May release should include this fix for both ML_BSSN and Baikal Samuel Cupp Postdoctoral Researcher Department of Physics University of Idaho

1 0

Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 25 Oct '23

25 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

1 0

Postdocs at RIT’s Center for Computational Relativity and Gravitation (CCRG)
by Manuela Campanelli 25 Oct '23

25 Oct '23

Dear Colleagues, The RIT’s Center for Computational Relativity and Gravitation (CCRG) is currently seeking to fill two postdoctoral research positions, including a senior postdoctoral fellowship in gravitational wave astronomy, as part of several NASA and NSF collaborative projects, including a new large NASA Theoretical and Computational Astrophysics Network grant. We are looking for highly qualified individuals interested in pursuing research in the fields of numerical relativity, theoretical and computational astrophysics, with an emphasis on general relativistic magnetohydrodynamics simulations of compact object mergers, such as accreting binary, massive, black holes and binary neutron stars. Accreting supermassive binary black holes are promising multi-messenger sources because they strongly emit both gravitational wave and electromagnetic radiation. It is the goal of our group to combine astrophysical knowledge about the environments of these sources with detailed physical simulations of gas flows in the immediate neighborhoods of these binaries as they proceed from large orbital separations through the merger proper and postmerger, and to predict the signals observers would see to identify them. Similarly, we are interested on pushing the frontiers in developing new high-performance algorithms that will allow us to perform long-term simulations neutron star coalescences from prior to merger through to the formation of disks and/or collapse of the merged remnant, the production of jets, and launching of outflows. The group is actively developing new numerical codes and tools (e.g. AsterX, SpacetimeX SphericalNR, Harm3D, PWMHD) as part of The Einstein Toolkit Consortium. The CCRG hosts a number of research scientists and students involved in gravitational wave data analysis from the LIGO Scientific Collaboration and the LISA consortium, and collaborate closely with the larger astrophysics group of observational astronomers gathering data from the Vera Rubin Observatory, Nanograv and JWST. Our researchers have access to some of the largest supercomputers in the world available at national computing centers such as the TACC’s Frontera Supercomputer and OLCF’ Frontiers exascale GPU-system. Additionally, the CCRG and RIT research computing provide our group exclusive access to several computer clusters with thousands of CPU cores and petabytes of storage. Applications should consist of a cover letter, a brief statement of research interests, a curriculum vitae including publication list, and at least three letters of recommendation. All materials should be sent electronically as soon as possible to: mxcsma[AT]rit.edu <http://rit.edu/> with a copy to ccrg-postdoc[AT]ccrg.rit.edu <http://ccrg.rit.edu/>. More information about the CCRG is available at http://ccrg.rit.edu/. And about Rochester at http://en.wikipedia.org/wiki/Rochester,_New_York We are looking forward to hearing from you! Manuela Campanelli, PhD Distinguished Professor — Astrophysical Sciences & Technology, Mathematics & Statistics, Director — RIT’s Center for Computational Relativity & Gravitation; Rochester Institute of Technology; 170 Lomb Memorial Dr. Rochester NY, 14623 585 475 7752 (Office) 956 345 1580 (Cell) mxcsma(a)rit.edu campanellimanuela(a)gmail.com rit.zoom.us/my/mxcsma ORCID: 0000-0002-8659-6591 Senior Staff Specialist: Wenli Chen; wxcvpr(a)rit.edu; 585-475-5298 ccrg.rit.edu "The time will come when men such as I will look upon the murder of animals as they now look on the murder of men." -- Leonardo da Vinci

1 0

Postdocs available at the RIT’s Center for Computational Relativity and Gravitation (CCRG)
by Manuela Campanelli 25 Oct '23

25 Oct '23

The RIT’s Center for Computational Relativity and Gravitation (CCRG) is currently seeking to fill two postdoctoral research positions, including a senior postdoctoral fellowship in gravitational wave astronomy, as part of several NASA and NSF collaborative projects, including a new large NASA Theoretical and Computational Astrophysics Network grant. We are looking for highly qualified individuals interested in pursuing research in the fields of numerical relativity, theoretical and computational astrophysics, with an emphasis on general relativistic magnetohydrodynamics simulations of compact object mergers, such as accreting binary, massive, black holes and binary neutron stars. Accreting supermassive binary black holes are promising multi-messenger sources because they strongly emit both gravitational wave and electromagnetic radiation. It is the goal of our group to combine astrophysical knowledge about the environments of these sources with detailed physical simulations of gas flows in the immediate neighborhoods of these binaries as they proceed from large orbital separations through the merger proper and postmerger, and to predict the signals observers would see to identify them. Similarly, we are interested on pushing the frontiers in developing new high-performance algorithms that will allow us to perform long-term simulations neutron star coalescences from prior to merger through to the formation of disks and/or collapse of the merged remnant, the production of jets, and launching of outflows. The group is actively developing new numerical codes and tools (e.g. AsterX, SpacetimeX SphericalNR, Harm3D, PWMHD) as part of The Einstein Toolkit Consortium. The CCRG hosts a number of research scientists and students involved in gravitational wave data analysis from the LIGO Scientific Collaboration and the LISA consortium, and collaborate closely with the larger astrophysics group of observational astronomers gathering data from the Vera Rubin Observatory, Nanograv and JWST. Our researchers have access to some of the largest supercomputers in the world available at national computing centers such as the TACC’s Frontera Supercomputer and OLCF’ Frontiers exascale GPU-system. Additionally, the CCRG and RIT research computing provide our group exclusive access to several computer clusters with thousands of CPU cores and petabytes of storage. Applications should consist of a cover letter, a brief statement of research interests, a curriculum vitae including publication list, and at least three letters of recommendation. All materials should be sent electronically as soon as possible to: mxcsma[AT]rit.edu with a copy to ccrg-postdoc[AT]ccrg.rit.edu. More information about the CCRG is available at http://ccrg.rit.edu/. And about Rochester at http://en.wikipedia.org/wiki/Rochester,_New_York We are looking forward to hearing from you! Manuela Campanelli, PhD Distinguished Professor — Astrophysical Sciences & Technology, Mathematics & Statistics, Director — RIT’s Center for Computational Relativity & Gravitation; Rochester Institute of Technology; 170 Lomb Memorial Dr. Rochester NY, 14623 585 475 7752 (Office) 956 345 1580 (Cell) mxcsma(a)rit.edu campanellimanuela(a)gmail.com rit.zoom.us/my/mxcsma ORCID: 0000-0002-8659-6591 Senior Staff Specialist: Wenli Chen; wxcvpr(a)rit.edu; 585-475-5298 ccrg.rit.edu "The time will come when men such as I will look upon the murder of animals as they now look on the murder of men." -- Leonardo Da Vinci

1 0

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

23 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

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

18 Oct '23

1 0

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

1 0

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

2 4

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 .

1 0

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

2 1

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

Users