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Einstein Toolkit bibtex file clean-up
by Erik Schnetter 26 Aug '11

26 Aug '11

I just cleaned up the Einstein Toolkit bibtex file. The most prominent changes were (a) using consisten entry names if the entry is not in Spires; I followed the existing convention of inventing a Spires-like name in this case instead of choosing different format for the entry name. I also (b) ensured that the eprint entries show up correctly; Spires splits up eprint entries into eprint, archivePrefix, and primaryClass, which are unfortunately ignored by most bibtex styles. I realise in hindsight that this is a substantial change; if you disagree, I will revert this change, and we can then discuss it. -erik -- Erik Schnetter <schnetter(a)cct.lsu.edu> http://www.cct.lsu.edu/~eschnett/

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easy question
by Steven R. Brandt 24 Aug '11

24 Aug '11

Is there an easy way to initialize all variables to zero (including _p _pp)? Cheers, Steve

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update new user guide for non-TeraGrid/XSEDE users?
by Friesen, Brian 24 Aug '11

24 Aug '11

Hi. I'm new to Cactus, the Einstein Toolkit, and mailing lists in general. Hope this works... Are there plans at some point to update/append the Tutorial for New Users to make it more general than just for TeraGrid/XSEDE users? At the UC-HIPACC school at LBL Erik showed us how to build/run on Hopper at NERSC (I'm a regular NERSC user so this was very helpfu), and the steps were considerably different. Unfortunately I didn't write down what we did and so am now a bit stuck. So Erik, if you're reading this, could you look through your shell history and maybe dig up the commands you used? :-P I'm trying to figure out how to do it again right now, and if I have any success would be more than happy to contribute to the tutorial. -- Brian C. Friesen Graduate Research Assistant University of Oklahoma friesen(a)ou.edu http://www.nhn.ou.edu/~friesen

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simfactory: memory request?
by Scott Hawley 23 Aug '11

23 Aug '11

Does simfactory automatically know how much memory I'm going to request from the host machine? I've looked in the Tutorial (perl) and the Advanced Tutorial, and haven't found such an option to set. Thanks. -- Scott H. Hawley, Ph.D. Asst. Prof. of Physics Chemistry & Physics Dept Office: Hitch 100D Belmont University Tel: +1-615-460-6206 Nashville, TN 37212 USA Fax: +1-615-460-5458 PGP Key at http://sks-keyservers.net

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Meeting minutes
by Roland Haas 22 Aug '11

22 Aug '11

Meeting minutes: Present were: Frank, Roland, Tanja, Josh, Bruno, Yosef, Erik ET release: * no new reported issues with Carpet/Hg and simfactory/python * CCE thorns (to be uodated with the missing SphericalHarmonicDecomp thorn today) have been moved into ET, thorns are in their final location * will incorporate CCE thornlist once all servers (McLachlan) are up again and the thornlist can be tested Fall workshop: * dates (in meeting minutes from 8/8 and soon on wiki): Oct. 31st to Nov. 3rd noon to noon. * topics will be MHD ** constraint transport ** radiation transport ** EOS * Infrastructure development ** improved scheduling (dependency based scheduling) ** GPGPU in Cactus Spring workshop: * target group: potential new users * have school on numerical relativity rather than code introduction only * timeframe: 3 intense days to accommodate grad students (classes, money) * initial schedule proposal to be decided in small group (the one with registered interest). Comments are welcome. ET paper: * some progress * TOV data is in * BBH waveform convergence is much higher than expected (8th order rather than 4th order). Investigate with extra runs at intermediate resolutions 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.

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Move of carpetcode.org
by Christian D. Ott 22 Aug '11

22 Aug '11

Dear All, the server handling carpetcode.org and carpet git and mercurial repositories is moving to new hardware today (2011/08/21). In this process, the IP address of the server will change from 78.46.246.114 to 78.47.165.8 and its ssh server key will change. If you access repositories via ssh, you will have to remove the old entry for carpetcode.org from your ~/.ssh/known_hosts file before being able to access the new server. Sorry for any inconvenience this move might cause. - Christian

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Einstein Toolkit Meeting Reminder
by Frank Loeffler 22 Aug '11

22 Aug '11

Hi Please consider joining the weekly Einstein Toolkit phone call at 10 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/ I short: the number is (+1) 225-578-4942 or (+1) 866-573-0359 and the conference id is 118682#. My agenda will contain: - The CCE thorns moved into the dev-version of the ET A test thornlist is in manifest (CCE.th). It's not in the main thornlist mainly because I couldn't test it because servers are currently down (server move) - Are there new issues with hg carpet? - Are there new issues with python simfactory? - The fall workshop needs an announcement: we need to pick one, at maximum two topics for the ET session. - The spring workshop needs some planning to be able to at least get an idea of what to get money for, mainly: - Which topic? - What is target group? - How many people? - Whom to invite for talks/lectures? - The ET paper saw some progress. I now handle this by direct emails to section writers, but please comment if you like within the meeting. Frank Loeffler

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IOJpeg change
by Steven R. Brandt 20 Aug '11

20 Aug '11

I'd like to propose the following change to IOJpeg. It gets rid of annoying error messages when one of the dimensions is one. if (CCTK_EQUALS(gridpoints, "hyperslab")) { /* now do the actual I/O looping over all directions */ for (dir = 0; dir < maxdir; dir++) { /* get the directions to span the hyperslab */ if (dir == 0) { dir_i = 0; dir_j = 1; /* xy */ if(GH->cctk_gsh[0]==1 || GH->cctk_gsh[1]==1) continue; } else if (dir == 1) { dir_i = 0; dir_j = 2; /* xz */ if(GH->cctk_gsh[0]==1 || GH->cctk_gsh[2]==1) continue; } else { dir_i = 1; dir_j = 2; /* yz */ if(GH->cctk_gsh[1]==1 || GH->cctk_gsh[2]==1) continue; } Cheers, Steve

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Possible performance issue with some codes
by Ian Hinder 18 Aug '11

18 Aug '11

Hi, A change was made a few months ago to ADMBase to solve some problems with the ADMBase variables not being synchronised in some situations where they need to be. This was r59 in ADMBase SVN. The bit I'm worried about is this: +# For Mesh Refinement it is possible (eg Cowling approximation) that ADMBase variables will need synchronization even when not evolved (eg when a new refined grid appears) +if (CCTK_Equals(evolution_method, "static") || CCTK_Equals(evolution_method, "none") || CCTK_Equals(lapse_evolution_method, "static") || CCTK_Equals(shift_evolution_method, "static") || CCTK_Equals(dtlapse_evolution_method, "static") || CCTK_Equals(dtshift_evolution_method, "static") ) +{ + SCHEDULE ADMBase_Boundaries IN MoL_PostStep BEFORE ADMBase_SetADMVars + { + LANG: C + OPTIONS: LEVEL + SYNC: lapse + SYNC: dtlapse + SYNC: shift + SYNC: dtshift + SYNC: metric + SYNC: curv + } "Select ADMBase boundary conditions - may be required for mesh refinement" +} For any code which does not use the ADMBase::[lapse/shift]evolution_method parameters to control their evolution, unnecessary syncs will be performed for the ADMBase variables. Whereas before these parameters seemed to be a superfluous part of the ADMBase infrastructure (after all, why activate your evolution thorn if you're not going to evolve with it?), it now seems that it is essential to extend and use these parameters if you want to use ADMBase, or performance will suffer. The GT evolution code would suffer from this, the last time I looked at it, and other groups' codes might also. -- Ian Hinder ian.hinder(a)aei.mpg.de

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Re: [Users] Reminder: Cactus support chat
by Ian Hinder 17 Aug '11

17 Aug '11

On 17 Aug 2011, at 05:00, knarf(a)cct.lsu.edu wrote: > Hi > > You are cordially invited to join our weekly Cactus support chat on > Wednesdays from 9am to 10am CDT/CST (central US timezone). > > The chat uses the EVO [1] collaboration software, which requires Java. > It also requires a valid login, but registration is free at > https://evo.caltech.edu/evoGate/Profile/register.jsp > > The EVO meeting URL is > http://evo.caltech.edu/evoNext/koala.jnlp?meeting=eleBevvsvIa8avaeIl > > In addition to the simple chat, EVO also offers audio/video conference > support as well as a view of remote desktops, which can make resolving > problems much easier in some cases. However, the typical support chat > doesn't make use of these additions, so it is ok to join e.g. without > sound or video support. > > The Cactus team > > [1] http://evo.caltech.edu/evoGate/ We decided in the ET telecon on Monday that a few of us would get together in this week's support chat and see how much progress we can make with addressing the tickets on trac.einsteintoolkit.org (this includes Cactus tickets as well as other ET tickets). We will try to close tickets that can be closed and test and apply patches for tickets which have them. Please consider joining in. -- Ian Hinder ian.hinder(a)aei.mpg.de

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