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Compiling Einstein Toolkit
by Hamilton, Maria 28 Jun '16

28 Jun '16

Hello, I was wondering if I can get some help in compiling the Einstein Toolkit on a cluster called BigGreen http://www.marshall.edu/itresearch/resources-and-tools/biggreen-cluster/ I’ve followed the instructions in https://docs.einsteintoolkit.org/et-docs/Compiling_the_Einstein_Toolkit I’ve created biggreen.marshall.edu.ini and biggreen.cfg, which are attached to this message. When I issued the commands: simfactory/bin/sim setup --optionlist= biggreen.cfg --runscript biggreen.sh simfactory/bin/sim build --thornlist=manifest/einsteintoolkit.th I get this error: Cactus requires a C++11 compiler -- check your C++ compiler and C++ compiler flags When I run: make ET-config options=simfactory/mdb/optionlists/biggreen.cfg THORNLIST=manifest/einsteintoolkit.th I get this error: checking whether the C++ compiler (g++ -g3 -march=native -std=gnu++11 -rdynamic) works... no configure: error: installation or configuration problem: C++ compiler cannot create executables (see configs/<configname>/config-data/config.log for details). I am attaching also the config.log. Thank you, Maria Babiuc

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looking for help with CT_MultiLevel
by Slinker, Kyle Patrick 27 Jun '16

27 Jun '16

I have been working with CT_MultiLevel in an attempt to solve the non-conformally-flat constraint equations and I'm wondering if there is an error in the thorn. Where I'm potentially seeing an issue is in CT_SolvePsiEquation.cc and CT_SolveErrorEquation.cc in the definitions of dtime (for both files this is line 33 in the Brahe release). First of all, having 0.5 in this definition means that the coefficient for the central point in the finite difference is hard-coded to a second order stencil. When using fourth order, this coefficient should be 0.4, I believe. This effectively changes the SOR omega. More importantly, I don't think it accounts for ct_cxx, ct_cyy, or ct_czz. So the central point in the finite difference is not getting multiplied by whatever coefficient the user is setting. Am I misunderstanding how the thorn works or are these really problems? I've attached what I believe is a way to fix them. Thanks for your help. Kyle Slinker

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meeting minutes for 2016-06-27
by Roland Haas 27 Jun '16

27 Jun '16

Present: Frank, Eloisa, Matt, Roland, Steve, Zach, Erik, Using slack to replace the IRC channel: * Frank inverstigated slack and used it in a different project and has had good experience so far. A test slack project has been created: https://einsteintoolkit.slack.com if you would to test this please send an email an Frank Loeffler knarf(a)cct.lsu.edu until we have a more permanent solution (in case we decide to use slack). Please provide your email address and name to appear in slack. Making grid function storage in HydroBase optional: * currently there are a number of grid functions that are not always being used or could be recomputed * there is a desire to make storage for those optional with the default being to have storage * Roland feels that this can be cumbersome if all client thorns require logic to check for storage rather than being able to rely on a complete set of variables always being present. This applies in particular to eps which can only be recomputed if the EOS is known Making GRHydro_Initdata independent of HydroBase: * agree that this is good idea, would make it useful as ID generator for other ID thorns eg for shock tubes * some parts are unfortunately tied to GRHydro and would have to be moved out of the thorn Reducing number of checkpointed variables in McLachlan: * RHS variables are fine to not be checkpointed. There should be a helper thorn ML_BSSN_Helper that adjust the checkpoint tags at runtime * constraints need to be checkpointed since they require prolongation to compute which cannot be re-created after recovery Carpet-preSync by Steve, a pull request exists: * an attempt to move the start of the SYNC forward so that a grid function that is computed only in the interior later needed everywhere SYNCing happens automatically and early TeamSpeak or Mumble as Google Hangout replacement: * both use equivalent technology * community is split about which one is better * hosting at LSU may be possible as IT is interested in this * external hosters tend to offer both for little money, will need grant money for this 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://keys.gnupg.net. _______________________________________________ Users mailing list Users(a)einsteintoolkit.org http://lists.einsteintoolkit.org/mailman/listinfo/users

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Einstein Toolkit Meeting Reminder
by Frank Loeffler 27 Jun '16

27 Jun '16

Hi Please consider joining the weekly Einstein Toolkit phone call at 9:30 am US central time on Mondays. As usual, you can find instructions how to join on the following web site: http://einsteintoolkit.org/community/support/ We use a Google hangout, with the URL: https://hangouts.google.com/call/5xt7voshalqmdcztr4zhfeox2ia Frank Löffler

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meeting minutes for 2016-06-20
by Roland Haas 21 Jun '16

21 Jun '16

Present: Eloisa, Roland, Frank, Matt, Yosef, Alternatives to Google hangout (should we require them): * at the workshop TeamSpeak was mentioned since it is used by LIGO and can handle large numbers of participants with little effort (hundred and up to 1000 were used by LIGO) * an open-source alternative using similar technology (same codec) is mumble * both offer a free-as-in-beer server as long as the number of participants is mall (<32 for teamspeak) * both (should) offer public calls and offer clients for all major OS * Frank looked into them a bit and will try and see what would be involved in hosting a server (at LSU) or also to pay for commercial hosting Report on ET workshop: * 30 students from around the world * mostly successful, however still points that need improvement * Matt request to announce the streaming earlier and to take time zone differences into account. Currently it was 7:00am ET. Link to recording: https://www.youtube.com/watch?v=f6pGoJ_5gdo * Bruno will put up the slides for the talks at http://events.unitn.it/en/et-eu2016 talks are already present * major current issue on wishlist is scalability and true AMR when using Carpet: * a discussion about current and future funding of the ET took place * future development in GRHydro and general cleanup was discussed Selected talks: * EOS framework and con2prim method by Wolfgang Kastaun * Cosmology applications of the ET by Hayley MacPherson * the full list is here: http://events.unitn.it/sites/events.unitn.it/files/download/et-eu2016/ET_WO… Brahe release: * happened during release, please report any issues * please propose new features for inclusion now so that they can be tested before the next release 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://keys.gnupg.net. -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://keys.gnupg.net.

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Einstein Toolkit Meeting Reminder
by Frank Loeffler 20 Jun '16

20 Jun '16

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simfactory question about hwloc and building utilities
by Vassilios Mewes 19 Jun '16

19 Jun '16

Hello everyone! A quick question about hwloc: We are trying to building an ET executable on a new machine, using HWLOC_DIR = BUILD in the .cfg file, as we want to use the bundled hwloc. The build of the ET succeeds, but when simfactory builds the utilities, we get the following error: Copying hwloc-bind from /usr/bin/hwloc-bind to /home/vass/Cactus/exe/sim Copying hwloc-calc from /usr/bin/hwloc-calc to /home/vass/Cactus/exe/sim Copying hwloc-info from /usr/bin/hwloc-info to /home/vass/Cactus/exe/sim Copying hwloc-assembler-remote from /usr/bin/hwloc-assembler-remote to /home/vass/Cactus/exe/sim make[1]: *** *No rule to make target '/usr/bin/hwloc-ls', needed by '/home/vass/Cactus/exe/sim/hwloc-ls'. Stop.* So apparently, the build process of the utilities still searches for hwloc executables in /usr/bin, although we specified to build hwloc in the .cfg file. Shouldn't it actually use the built binaries? It then fails copying hwloc-ls, which does not exist. How can I tell the build system to actually use the hwloc binaries we have built? Best wishes, Vassili

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Re: [Users] [Commits] [svn:einsteintoolkit] www/about/gallery/gw150914/ (Rev. 1599)
by Frank Loeffler 18 Jun '16

18 Jun '16

On Wed, Jun 15, 2016 at 05:26:23PM +0000, barry.wardell(a)gmail.com wrote: > gw150914: add tarball with example data I've removed them from svn and host them directly. I know that this isn't ideal, as it currently requires me to update this, but it would be a bit unwieldy to have this included in each svn checkout (we also need to get the recordings out...). Frank

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users of gmail hosting, and mailman posts
by Frank Loeffler 16 Jun '16

16 Jun '16

Hi, Because this came up for at least one of the users of the Einstein Toolkit mailman email lists, I think it would be good to spread the "solution". The symptom that user saw was that their own posts to the mailing lists didn't show up in their own INBOX. There is a mailman setting that could disable posts back to the sender, but that wasn't the issue here. The issue in the end was that the email provider was gmail (even though the domain appears differently): If you have a mailing list that includes subscribers using gmail, a copy of messages they send to the list won’t appear in their own Gmail “Inbox”. It only shows in “Sent Mail” or “All Mail”. This is a problem on the Gmail end. The list server correctly delivers the message to the gmail.com servers, but Gmail discards it. According to Gmail: Mail you send to a mailing list you subscribe to will only appear in "Sent Mail". Gmail automatically skips your Inbox and archives the message to save you time and prevent clutter. The message will appear in your Inbox if someone responds to it or if there is an error delivering the message. If you'd like to view your message, you can find it in Sent Mail or All Mail. You can find more information about this on this Gmail help page: https://support.google.com/mail/answer/8824?rd=1 There is no way to avoid this problem, unfortunately. It's something Gmail controls, not the list server. Frank

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ET school and workshop is streamed live
by Bruno Giacomazzo 16 Jun '16

16 Jun '16

Dear All, we are currently in the last day of the School and tomorrow we will start the workshop. As a test, today we are broadcasting the school live and, if it works, we will do the same for the workshop tomorrow. These are the links: YouTube: http://youtu.be/lCVMZsRqc_0 Hangouts: https://plus.google.com/events/cqafafqfl3kk4lvsehjmrdvsa1g Let me know if it works. First lecture in 30 minutes by Moesta and Miller. The program can be found here: http://events.unitn.it/en/et-eu2016 Cheers, Bruno -- Dr. Bruno Giacomazzo Department of Physics University of Trento via Sommarive 14 38123 Trento Italy Tel. : +39 0461281631 email : bruno.giacomazzo(a)unitn.it web: http://www.brunogiacomazzo.org ---------------------------------------------------------------------- There are only 10 types of people in the world: Those who understand binary, and those who don't ----------------------------------------------------------------------

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