Users May 2012

users@lists.einsteintoolkit.org

21 participants
44 discussions

Meeting minutes
by Roland Haas 14 May '12

14 May '12

present were: Tanja, Ian, Eloisa, Erik, Frank, Roland, Yosef, Bruno, Peter, Philipp ET release: * we will enter a soft freeze this afternoon (central time). After this all commits require discussion. The only exception are documentation changes which only need to be tested to properly compile (ie LaTeX must run). * all major features should be in be this afternoon * will create release branch on May 24th * issue https://trac.einsteintoolkit.org/ticket/848 will change the values on the grid for conformalMethod = 1. It was wrong before. We will include a warning to this effect in the release notes. * run tests on all machines New thorns: * Bruno and Peter will import EinsteinExact. Peter created tests for AHFinderDirect using EinsteinExact which we will include besides the current Exact ones. Outstanding tickets: * CCE warnings will not be fixed since avoiding them requires some code rewrite. Since the code currently runs we will postpone this until after the release. * GRHydro: accept bugfixes but flush all new features (multirate, sync_only_conserved) after the release. * add Balsara MHD shock tubes as test suites for (G)RMHD * Peter will include a performance fix by Christian Reisswig for SummationByParts. * leave status of https://trac.einsteintoolkit.org/ticket/626 as is since the error occurs only under special (and unusual) circustances and was present in the last time 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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Einstein Toolkit Meeting
by Frank Loeffler 13 May '12

13 May '12

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#. The main topic will be the organization of the next ET release. In particular, this means we will discuss: - Release-relevant tickets (21) [1] - Schedule: - soft freeze date of May 14th (evening) - no additions (thorns ect.), major changes, new features - hard freeze date of May 21th - only 'important' bug fixes or documentation improvements ^--> to be decided by two maintainers - release date of May 28th. Not necessarily connected to the release: - Bug reports: quite a lot happened during last week: 41 issue were opened or changed and are still open, and 19 tickets could be closed. Some of them were: - Cactus now has timers for each I/O method - Some parameter expressions can now be used within parameter files, however, this makes the ordering of parameter files important (is used) - Some thorns received patches to allow different sizes for CCTK_REAL, ect. As usual, feel free to add to this agenda. Frank Loeffler [1] https://trac.einsteintoolkit.org/query?status=accepted&status=assigned&stat…

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Re: [Users] [Commits] [svn:einsteintoolkit] GRHydro/trunk/src/ (Rev. 319)
by Bruno C. Mundim 12 May '12

12 May '12

On 05/11/2012 06:46 PM, schnetter(a)cct.lsu.edu wrote: > @@ -478,7 +480,7 @@ > end do > else !!$ Really implement C&W, page 197; which requires stencil 4. > do i = 4, nx - 3 > - s=sign(1.d0, -dpress(i)) > + s=sign(one, -dpress(i)) > flatten = max(tilde_flatten(i), tilde_flatten(i+s)) > if (abs(1.d0 - flatten)> 0.d0) then > trivial_rp(i-1) = .false. Hi Erik, you missed the line above: if (abs(1.d0 - flatten)> 0.d0) then Cheers, Bruno.

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Compiler warnings
by Frank Loeffler 11 May '12

11 May '12

Hi, While compiling a fresh checkout of the upcoming release I noticed (yet again) the high number of compiler warnings scrolling by. I captured them into a file and got 280k lines in 38MB this way! I parsed this and produced a graph showing how many and which warnings are produced for each thorn. Of course this is highly dependent on the compiler, it's version and flags. In this case I used numrel-gcc.cfg from simfactory. As you can see from the graph at http://www.cct.lsu.edu/~knarf/ET_stats/warnings.pdf there are a few thorns which by far dominate the picture (notice the log-x scale). These three thorns are all auto-generated. Could we do something to reduce these numbers, and possibly also a few of the others? The build log can be found here: http://www.cct.lsu.edu/~knarf/ET_stats/build.log.xz Frank Note: the color-coding in the lower plot is a _linear_ ratio, while the overall size of the bars is log-x.

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Announcing pygraph
by David Radice 11 May '12

11 May '12

Dear ET users, in the past year or so Massimiliano Leoni (in CC) and I have been developing a Python/Qt 1D data visualization client called "pygraph". Pygraph is meant to be an easy-to-use and easy-to-hack drop-in replacement for ygraph, released under the GPLv3 license. Pygraph has been used for several months by many of us here at AEI and by a few other people and we believe that it is now stable enough to be publicized to the whole numrel community. Pygraph supports most of the functionalities of ygraph as well as some new features, such as: 1. native support for xgraph, Carpet 0D/1D and IOScalar ASCII file format (including proper handling of the diagonal direction); 2. native support for Carpet 1D HDF5 file format, including AMR and multi-patch data (with coordinate re-mapping); 3. automatic merging of "simfactory-style" splitted output datafiles; 4. exporting single frames in gnuplot-friendly ASCII format or all the frames in PNG; 5. working log scales and zoom stacks; 6. some basic data-editing functionalities using numpy; 7. ... :) Pygraph is available from: https://bitbucket.org/dradice/pygraph It requires my python library for importing Carpet output files: https://bitbucket.org/dradice/scidata as well as a few other libraries (see the README). Pygraph has been mainly developed and tested on Linux, but Barry wrote a tutorial, that you can find in the README.OSX file, that explains how to install pygraph on OS-X and make it work with the native OS-X widgets. In principle pygraph should also work on Windows, but this has never been tested. Please feel free to try pygraph: it is released with the hope that it will be useful and any form of criticism is welcome. Especially if it comes in the form of a unified patch or a pull request on bitbucket! Best, David & Massimiliano -- http://numrel.aei.mpg.de/people/radice

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cctk_lsh and ghost points
by Petr Tsatsin 09 May '12

09 May '12

I have a very basic question about ghost points in Cactus. Is the cctk_lsh contains the size of the local grid with ghost points or not? -- Petr Tsatsin Graduate Student - Department of Physics Charles E. Schmidt College of Science Florida Atlantic University (561)-297-3386 cell: 561-692-2040 ptsatin(a)fau.edu, ptsatsin(a)gmail.com

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Re: [Users] [Einstein Toolkit] #706: External Library Support
by Steven R. Brandt 09 May '12

09 May '12

Do you mean save it for after the release? I am okay with doing so. Cheers, Steve On 05/05/2012 09:57 AM, Einstein Toolkit wrote: > #706: External Library Support > --------------------------+------------------------------------------------- > Reporter: sbrandt | Owner: > Type: enhancement | Status: new > Priority: minor | Milestone: Cactus_4.1.0 > Component: Cactus | Version: > Resolution: | Keywords: > --------------------------+------------------------------------------------- > > Comment (by eschnett): > > Yes we should. Can we deprecate this for the upcoming release? >

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Adding gridfunction output mid-subroutine?
by Scott Hawley 09 May '12

09 May '12

Is there a way to, e.g. call CarpetIOHDF5, from the middle of a subroutine -- apart from "scheduling" the output? I'm debugging a new thorn, and I want to be able to view the changes to data as they proceed through the various operations. (And it'd be nice to not have to break up my routine into a series of sub-thorns just to debug..) Thanks! Scott

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[patch] HydroBase does not initialize the Lorentz factor
by David Radice 08 May '12

08 May '12

Dear ET users, currently HydroBase does not initialize the Lorentz factor. This is a problem for my code because it uses the Lorentz factor to compute the fluid four-velocity, which is needed for some other calculations. Since it makes perfect sense to use my code in situations where the fluid is not evolved, or even when there is no fluid at all, I cannot rely on GRHydro, Whisky or some other ID thorn to fill-in the Lorentz factor. It would be better, instead, if the Lorentz factor was initialized to 1 in the case where there is no fluid, but HydroBase is activated. In this way one is automatically guaranteed that the Lorentz factor is meaningful. For this reason I created the attached (trivial) patch for HydroBase that simply initializes w_lorentz to 1. Could you please consider applying this patch to the trunk version of HydroBase? Best, David -- http://numrel.aei.mpg.de/people/radice

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Tickets important for next release
by Erik Schnetter 07 May '12

07 May '12

I suggest to consider the following tickets milestones for the next release: [To review] #827 merge bugfixes from Zelmani into main branch review defect major rhaas 2 weeks EinsteinToolkit thorn #866 Add I/O timers to Cactus flesh review enhancement major eschnett 2 days Cactus #525 Clean up CCTK_GFINDEX definitions review enhancement minor eschnett 9 months Cactus #846 Support CCTK_REAL4 in AHFinderDirect review enhancement minor eschnett 6 days EinsteinToolkit thorn #867 Add parameter to poison periodic boundaries review enhancement minor eschnett 2 days EinsteinToolkit thorn #869 Allow different boundary conditions in ADMBase review enhancement minor eschnett 2 days EinsteinToolkit thorn #870 Support real*16 (and real*4) in GRHydro review enhancement minor eschnett 2 days EinsteinToolkit thorn #642 Cactus documentation target AllDoc does not make all the documentation review enhancement optional hinder 7 months Cactus #839 MoL Multirate capabilities. This add three new multirate RK schemes to MoL. review -- enhancement optional reisswig(a)tapir.caltech.edu 7 days Cactus [Reviewed Ok] #773 McLachlan dissipation should be disabled by default reviewed_ok enhancement major hinder 8 weeks Other #791 Output timer tree as XML reviewed_ok eschnett enhancement minor hinder 5 weeks Carpet #848 McLachlan "NewRad" radiative boundary condition does not consider conformalMethod reviewed_ok defect minor hinder 6 days Other #862 Make HDF5 output in AHFinderDirect work reviewed_ok hinder defect minor eschnett 4 days EinsteinToolkit thorn -erik -- Erik Schnetter <schnetter(a)cct.lsu.edu> http://www.perimeterinstitute.ca/personal/eschnetter/

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Users May 2012