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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 27 Sep '21

27 Sep '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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unequal mass binaries with PRThorns GRHydro
by Hamilton, Maria 23 Sep '21

23 Sep '21

Hello, I have an error when simulating unequal mass binaries with PRThorns GRHydro for certain combinations of EOS and mass ratios. Using the same parameter file for an equal mass binary case, seems to work with various EOSs, and for certain EOSs, even for unequal mass. Any inkling of why this might happen? I tried with both ppm and weno recon_method, and with higher refinement. What do you think would help? Maria ____________ WARNING level 1 from host compute-14.marshall.local process 16 while executing schedule bin CCTK_POSTSTEP, routine GRHydro::check_GRHydro_C2P_failed in thorn GRHydro, file GRHydro_Con2Prim.F90:1781: -> ; stopping the code. _______________________ Maria C. Babiuc Hamilton, Ph.D. Professor, Department of Physics College of Science, Marshall University, 1 John Marshall Drive, Huntington, WV, 25755 Room S 257, Phone: (304)696-2754

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Meeting Minutes 2021-09-16
by Miguel Gracia 23 Sep '21

23 Sep '21

Present: Peter D., Miguel G., Steven B., Leonardo W., Gabriele B., Yosef Z., William G., Zach E. Chair: Peter D. Minutes: Miguel G. * SPEC benchmark contribution [SB]: No update * Next ET release: [SB]:No release action deadline coming soon, no update this time. * CarpetX [SB] Trying to make it run in 2D with one ghost point in z direction. [WG] Where is CarpetX?, [SB] CarpetX’s repo: https://bitbucket.org/eschnett/cactusamrex.git [SB] One can run a qc0 example. * Unanswered question on mailing list: Maria’s email about con2prim failure: need more information about the failure. [ZE] con2prim can fail if velocity too high when speed limit is not set. Numerical errors tend to trigger unphysical states that could produce failures. too low resolution will increase failures. Konrad’s email. nobody in the call knows about THC_Core Thorn. [ZE] Unsupported thorns should be referred directly to the thorn’s author. Hee II Kim’s email. [SB] is trying to reproduce the described crash. Will answer to Hee II Kim when finished. Other questions: no questions * Open tickets No updates * Tickets ready to review [WG] proposed a group effort to clean all the tickets that are not difficult to solve. will be discuss in the next meeting. Next call: September 30th Chair: Yosef Z. Minutes: William G. — end of the call

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 22 Sep '21

22 Sep '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. 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 20 Sep '21

20 Sep '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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Meeting Minutes 2021-09-16
by Gabella, William E 16 Sep '21

16 Sep '21

Present: Roland H, Helvi W, Peter D, Steve B, David B, Niklas M, Leonardo R, Bruno G, Gabriele B, Bill G, Atul K, Miguel G Chair: Helvi, Minutes: Bill * next ET release [SB, YZ, RH] https://docs.einsteintoolkit.org/et-docs/Release_Details Steve, has created a timeline in Release Details, and it seems nothing requires urgent attention right now. If you have a new feature you want in the ET, you should make that known. And we need to check on reviewing new features. Kuibit, reviewer Yosef not present. RePriMand thorn, Roland has compiled it and you do need Meson installed and then the external libraries thorn that is included does build. So at this point need to look through the code. It is a stand-alone code, so considering how/what the tests should be. Steve, added a list of new items proposed for the next release above the Release Details timeline under New Functionality (after some discussion). Roland, in the past created a Milestone on the release that includes these items. Helvi, FRWSolver from Hayley McPherson needs external Python compilation and try to see how to make it robust. Fuka, is anyone reviewing it and the Kadath elliptic solver? Roland, it uses C++ features we do not support in the ET, needs C++14 vs C++11 (now). Not going in. Some links: Fuka, https://kadath.obspm.fr/fuka/ Kuitbit, https://sbozzolo.github.io/kuibit/ RePriMand, https://github.com/wokast/RePrimAnd FLRWSolver_public, https://github.com/hayleyjm/FLRWSolver_public * Seminar and tutorial series [RH] Roland, in the ET meeting there was discussion to revive the seminar series and to have it more open...and to offer tutorials, and would like those using the tutorials to share how it worked for them. One presenter Wolfgang Kastaun, but that is it. Frequency, Steve suggests once a month is good. General agreement. Helvi, Num Rel community call is first Monday of the month---Nils getting speakers from different code infrastructure. So maybe go with the second or third week of the month. Collect suggestions at the link https://docs.einsteintoolkit.org/et-docs/Einstein_Toolkit_Seminar_Proposals Suggestions: ** Gabriele B volunteered for Kuibit tutorials. ** Roland, suggests CarpetX and GRHydroX talks. ** Bruno, Jay Vijay Kalinani and Lorenzo Ennoggi for Spritz, similar. ** Helvi, Giuseppe Ficarra. ** Roland, Sam Cupp maybe...he is currently working with Roland and Steve benchmarking the low-level infrastructure for CarpetX. ** Roland on how to setup Simfactory on a cluster, probably in one or two months from now. ** Helvi, Hayley McPherson give apresentation on the FRLW solver. Hands-on about generating initial data maybe. ** Helvi for xTensor tutorial part 2, BSSN or Initial Data. She is giving it next week Monday, 20 Sept, UCLA tutorial week Math Comput challenges. Tutorial / School week this week and next week. Helvi, Start on October 21st, the third week...and November 18th following...and December 16th after that. * SPEC status[RH, SB] Roland, have not done anything since last week. Trying to satisfy the short and long runs parameter file. Timeline? SPEC is valuable for being benchmarked and spreading around the community, as well as reporting to NSF. * Atul, asks about the Midwest Relatvitiy Meeting and Helvi responds that it will be hybrid, i.e. in-person and online. https://midwest-relativity-meeting-2021.physics.illinois.edu/ [https://www.einsteintoolkit.org/tools/unanswered.php unanswered question on mailing list] Topolski on THC Thorn, Kadath elliptic solver in Fuka branch. Seems mostly a THC question. David Radice seems to be responding. Hee Il Kim on Intel compilers. Helvi, can anyone follow-up with him? Yosef said something about difficulties with newer compilers. Helvi, could compile on Mac with M1 chip which is great, with Roland's help. Will send the Pull Request and it can be included in the release. [https://bitbucket.org/einsteintoolkit/tickets/issues?status=open&status=new… open tickets sorted by update time] #2551, ReprMand #2549, FLRW solver #2538, Inlude Kuibit, waiting for review. #2487, *_evolution_method = "LeanBSSNMoL", Helvi can look at it, but is busy right now. #2565, compiling PETSc, Roland hopes the new verison of PETsc fixes this, currently defaults to Python 2. #2564, Catctus' configure test, Roland, a bit technical. We test C++ by creating a file with extension *.C but this fails for CUDA which wants .cxx (or .cpp). A fix might be our own test for C++ compiles and if you can parse the Autoconf there, it should work. If that works, will make it into a Pull Request. #2254, Cactus thorns register citation request at runtime, this would be nice. Adds two function calls to Formaline that adds string to use this citation if you use the thorn. Right now hard to read, because in Formaline text format. Bibtex file and format is best. Seems straightforward but takes some time. [https://bitbucket.org/einsteintoolkit/tickets/issues?status=new&status=open… tickets ready for review] * Any other business ** Compiler Warnings David, how many people compiling the ET watch the compile, esp the compiler warnings? Roland, compiles from scratch and does not look for the whole ET, but for a thorn being developed he pays them a lot of attention. And many warnings come from F77, ancient code that we mostly do not use. Roland, if you do have fixes for the warnings then put in the pull request for it. Some of the warnings should be easy to fix. * Next week Chair: Peter D, Minutes: Miguel G -- ============================== William Gabella Research Assistant Professor Department of Physics and Astronomy Nashville, TN USA (o) 615-343-2713

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Compilation error using Simfactory
by Jay Vijay Kalinani 16 Sep '21

16 Sep '21

Hi all, I have been trying to set up the Einstein Toolkit along with the GRMHD code Spritz on a recently upgraded machine 'Galileo100 <https://wiki.u-gov.it/confluence/display/SCAIUS/GALILEO100+short+guide>' at CINECA, Bologna, Italy. When I try to compile with simfactory, I get the following error message: [jkalinan@login02 Cactus]$ ./simfactory/bin/sim build Spritz --machine=g100 --thornlist=./thornlists/einsteintoolkit_newSpritzBNS.th Using configuration: Spritz Reconfiguring Spritz Writing configuration to: /g100/home/userexternal/jkalinan/ET/Lorentz/Cactus/configs/Spritz/OptionList /bin/bash: -c: line 0: syntax error near unexpected token `;' /bin/bash: -c: line 0: `{ ; } && { cd /g100/home/userexternal/jkalinan/ET/Lorentz/Cactus && echo yes | { make -j4 Spritz-config options=/g100/home/userexternal/jkalinan/ET/Lorentz/Cactus/configs/Spritz/OptionList; } 2>&1; }' Unfortunately, I am not familiar with this type of error, and any insights on how to understand and/or fix this error and compile correctly with simfactory would be much appreciated. Kindly let me know. The python version loaded on the machine is 3.8.6. However, I am able to compile without any problems using make via the following commands: make Spritz-config options=/g100/home/userexternal/jkalinan/ET/Lorentz/Cactus/simfactory/mdb/optionlists/g100.cfg thornlist=./thornlists/einsteintoolkit_newSpritzBNS.th make Spritz Thank you very much. Cheers, Jay Kalinani

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 15 Sep '21

15 Sep '21

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 13 Sep '21

13 Sep '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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Code failure apparently due to changes in Reduction.c
by Yosef Zlochower 13 Sep '21

13 Sep '21

Hi, A code that we are using seems to no longer work with Cactus. The issue seems to be that the code called CCTK_LocalArrayReductionHandle. The code, as checked out, produces errors because the appropriate handle isn't found. If I modify the function as below, I no longer get the error message int CCTK_LocalArrayReductionHandle(const char *reduction) { int handle; handle = Util_GetHandle(LocalArrayReductionOperators, reduction, NULL); if (handle < 0) { CCTK_VWarn(1,__LINE__,__FILE__,"Cactus", "CCTK_LocalArrayReductionHandle: No handle: '%d' found for reduction operator " "'%s'", handle, reduction); } handle += ARRAY_OPERATOR_HANDLE_OFFSET; //// MY changes return handle; } Should we no longer use CCTK_LocalArrayReductionHandle? -- Dr. Yosef Zlochower Center for Computational Relativity and Gravitation Associate Professor School of Mathematical Sciences Rochester Institute of Technology 85 Lomb Memorial Drive Rochester, NY 14623 Office:74-2067 Phone: +1 585-475-6103 yosef(a)astro.rit.edu CONFIDENTIALITY NOTE: The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this information.

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