Users February 2013

users@lists.einsteintoolkit.org

20 participants
25 discussions

Einstein Toolkit Meeting
by Frank Loeffler 10 Feb '13

10 Feb '13

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#. Remember that today (Feb 10th), network connections to LSU might be interrupted due to upgrades happening at LSU. This includes almost every ET service, but should be finished by tomorrow. Proposed, new thorns start to accumulate in svn.einsteintoolkit.org/manifest/branches/proposed/einsteintoolkit.th. The meeting might be a good place to present/discuss these new thorns. The current list is: CactusTest/TestFortranCrayPointers AEIThorns/TensorTypes LSUThorns/PeriodicCarpet CarpetExtra/CarpetIntegrateTest CarpetExtra/CarpetProlongateTest CarpetExtra/CarpetRegridTest CarpetExtra/Nirvana CarpetExtra/ReductionTest CarpetExtra/ReductionTest2 CarpetExtra/ReductionTest3 CarpetExtra/RegridSyncTest CarpetExtra/TestCarpetGridInfo CarpetExtra/TestLoopControl Llama/ADMDerivatives Llama/Coordinates Llama/GlobalDerivative Llama/HarmonicDecomposition Llama/Interpolate2 Llama/SphericalSlice Llama/WaveExtractL Llama/WorldTube CTGamma/CTGBase CTGamma/CTGConstraints CTGamma/CTGEvolution CTGamma/CTGGauge CTGamma/CTGMatter CTGamma/CTGRadiativeBC CTGamma/CartesianCoordinates CTGamma/Psiclops Also, backporting was an issue on the mailing list recently, mainly because we tend to do this more often than in recent years. The current status is: - There is one development branch where most of the development is supposed to be happening. This is not guaranteed to be stable, but some effort in that direction should be visible. - There might be separate development branches for features that are too disruptive, even for the development branch. They should be short-lived and be merged back as soon as possible. - There are release branches. These received some care and testing and are updated if major bugs are found. - There have been (but are not for recent releases) release tags - tagging specific versions of a release branch. This was used in the beginning of the ET, but because we hardly ever changed the release branch their usage was discontinued. This could of course be changed again. Users should not checkout using the tags, as these will (of course) not receive any fixes. - There was the question of how to find out exactly which version someone is using (keeping in mind that release branches are not a fixed code base). It was proposed to add an option to GetComponents which could list the revisions of all components and possibly even creating a hash of all of them. This could be compared with 'known versions' and would give some measure to get to this information. No patch was proposed yet to my knowledge. It would also be nice if such an option could detect any local changes/commits and flag them or possibly even create a patch. Frank Löffler

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Grid structure
by Matthew Turk 08 Feb '13

08 Feb '13

Hi all, I was wondering if someone could point me at how to parse the grid structure information in a Cactus output. I hope this is the right venue for this type of question. In the output I'm examining, under the "Parameters and Global Attributes" node at root level, there's a "Grid Structure v5" dataset, which contains "grid_superstructure" and "grid_structure". Is parsing the string affiliated with the grid_superstructure component the best way of identifying the spatial extent, dimensions and refinement level of grids in the output? Thanks very much for any pointers, Matt

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question about ET on Stampede (TACC)
by Bruno Giacomazzo 07 Feb '13

07 Feb '13

Hi, I'd like to compile and run ET on the new TACC cluster Stampede. Did anybody run ET on stampede? I see that there are already simfactory scripts for stampede in the ET development version, but I'm not sure if they have been already fully tested (I see that there are comments about job submission not having been tested yet). I'm also curious to know if you think that the hybrid approach can be of any use for ET/GRHydro (or ET/Whisky) on that machine. I'm not very familiar with the Intel Phi coprocessor and MIC programming (but it seems similar to GPU, except for being much easier to use). Thanks, Bruno Dr. Bruno Giacomazzo JILA - University of Colorado 440 UCB Boulder, CO 80309 USA Tel. : +1 303-492-5170 Fax : +1 303-492-5235 email : bruno.giacomazzo(a)jila.colorado.edu 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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Einstein Toolkit Seminar
by Roland Haas 04 Feb '13

04 Feb '13

Hi Please consider joining the Einstein Toolkit Seminar next week Monday, February 4h, at 10 am US central time. We will use the Einstein Toolkit Meeting venue for this, and will use a Webex seminar. Details on Webex (system requirements, how to connect, phone in numbers) will be provided in a separate email soon. Details (and eventually link to the slides) can be found at http://einsteintoolkit.org/seminars/2013_02_04/ Next weeks presenter will be Christian Reisswig from the Caltech, talking about "Three-Dimensional General-Relativistic Hydrodynamic Simulations of Binary Neutron Star Coalescence and Stellar Collapse with Multipatch Grids". Roland Haas

3 6

No Einstein Toolkit Meeting (BUT Seminar)
by Frank Loeffler 01 Feb '13

01 Feb '13

Hi, As announced earlier, instead of the usual, regular Einstein Toolkit phone call at 10 am US central time on Mondays we will have an Einstein Toolkit Seminar next Monday, February 4th, at 10 am US central time. Next weeks presenter will be Christian Reisswig from the Caltech. He will be speaking about "Three-Dimensional General-Relativistic Hydrodynamic Simulations of Binary Neutron Star Coalescence and Stellar Collapse with Multipatch Grids". Details (and eventually link to the slides) can be found at http://einsteintoolkit.org/seminars/2013_02_04/ To participate, you *need to register to receive an invitation*; see <http://einsteintoolkit.org/seminars/2013_02_04/> for instructions. If you register, you will receive an invitation email about an hour before the talk with detailed instructions, as well as a fall-back phone number for calling in. Erik Schnetter will host the seminar. Frank Löffler

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Users February 2013