Trac April 2013

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[Einstein Toolkit] #478: add Cactus to tis.xsede.org
by Einstein Toolkit 06 Jul '13

06 Jul '13

#478: add Cactus to tis.xsede.org --------------------+------------------------------------------------------- Reporter: knarf | Owner: Type: task | Status: new Priority: minor | Milestone: Component: Cactus | Version: Keywords: | --------------------+------------------------------------------------------- -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/478> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #450: Output elapsed times for test cases
by Einstein Toolkit 06 Jul '13

06 Jul '13

#450: Output elapsed times for test cases -------------------------+-------------------------------------------------- Reporter: eschnett | Owner: Type: enhancement | Status: new Priority: minor | Milestone: Component: Cactus | Version: Keywords: | -------------------------+-------------------------------------------------- To ensure that Cactus test cases don't run for too long, and to identify those that do, we should output the run time for all test cases together with their results. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/450> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #229: Using a nonexistent header file should lead to an error message
by Einstein Toolkit 06 Jul '13

06 Jul '13

#229: Using a nonexistent header file should lead to an error message --------------------+------------------------------------------------------- Reporter: hinder | Owner: Type: defect | Status: new Priority: major | Milestone: Component: Cactus | Version: Keywords: | --------------------+------------------------------------------------------- If I have the following in my interface.ccl, USES INCLUDE: vectors.h but no thorn in my thornlist provides this header file, there is no error at compile time. Further, if I #include this file in my source file, an empty file is included, which means that again I don't get an error. The first indication that something is wrong is that the contents of the header file are not available, which makes debugging the problem with the thornlist very confusing. I propose that the CST should emit a fatal error if one of the thorns tries to use a header file which does not exist. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/229> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1238: implement buffer mask in CarpetEvolutionMask
by Einstein Toolkit 29 Jun '13

29 Jun '13

#1238: implement buffer mask in CarpetEvolutionMask ---------------------------------+------------------------------------------ Reporter: rhaas | Owner: eschnett Type: enhancement | Status: new Priority: minor | Milestone: Component: Carpet | Version: Keywords: CarpetEvolutionMask | ---------------------------------+------------------------------------------ the attached patch implements a new integer valued grid function carpetevolutionmask::buffer_mask which is set to 1 in buffer regions and 0 otherwise. It provides a testcase. Eventually I would like to add other values such that the number correlates with the last MoL step for which this point needs to be valid before MoL_CalcRHS but for which one cannot compute a RHS in MoL_CalcRHS. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1238> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1222: Reduction weight for periodic domains.
by Einstein Toolkit 24 Jun '13

24 Jun '13

#1222: Reduction weight for periodic domains. ------------------------+--------------------------------------------------- Reporter: bentivegna | Owner: eschnett Type: defect | Status: new Priority: minor | Milestone: Component: Carpet | Version: development version Keywords: | ------------------------+--------------------------------------------------- The reduction weight of the internal points neighboring the outer boundaries is currently set in a "trapezoidal-rule" manner (1/2 on the box faces, 1/4 on the edges, 1/8 on the vertices, in 3D), regardless of the nature of the boundaries. In the case of periodic boundaries with a Coordbase::boundary_shiftout_* parameter of zero, this leads to the assignment of a non-zero weight to some of the boundary points. This only yields the correct result if boundary conditions have been applied, which sometimes isn't possible/necessary. The attached patch introduces some logic in CarpetReduce to take care of this case. This may not be the best way to attack the problem though. One could tackle the way weight is assigned to zero-shiftout boundaries. Perhaps this issue is related to #1221. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1222> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1236: ReflectionSYmmetry does not handle vector groups of vectors correctly
by Einstein Toolkit 14 Jun '13

14 Jun '13

#1236: ReflectionSYmmetry does not handle vector groups of vectors correctly -----------------------------------------------------------------------+---- Reporter: rhaas | Owner: Type: defect | Status: new Priority: minor | Milestone: Component: Cactus | Version: Keywords: RelfectionSymmetry RotatingSymmetry180 RotatingSymmetry90 | -----------------------------------------------------------------------+---- Currently we use two different way to define vectors in Cactus: {{{ CCTK_REAL vel[3] "some vector variable" }}} and {{{ CCTK_REAL vel { velx, vely, velz } "some other vector variable" }}} both of which work with ReflectionSymmetry since it only looks at the ordering of variables in a group (ie does vi=CCTK_FirstVarInGroup() then assumes vi is the x component vi+1 the y component and vi+2 the z component). For a group of related vectors we'd like to use {{{ CCTK_REAL nvel[42] { velx, vely, velz } "bunch of vector" }}} which almost works in the indeed CCTK_VarIndex("velx[0]") + 1 == CCTK_VarIndex("vely[0]"). Unfortunately the symmetry thorns assume that vector groups contain precisely three members. A simple fix seems to instead assert() that the number of members is divisible by 3 and then loop over them in chunks of three. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1236> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1309: implement UIUC's speed-up in "evaluation" of spectral solution
by Einstein Toolkit 11 Jun '13

11 Jun '13

#1309: implement UIUC's speed-up in "evaluation" of spectral solution --------------------------------------+------------------------------------- Reporter: bernard.j.kelly@… | Owner: Type: enhancement | Status: new Priority: major | Milestone: Component: EinsteinToolkit thorn | Version: ET_2012_11 Keywords: twopunctures evaluation | --------------------------------------+------------------------------------- The accompanying svn patch applies the recently released refinement of TwoPunctures by Vasileios Paschalidis and Zach Etienne at UIUC, greatly reducing the time taken to properly apply the solution of the spectral solve to all grid points. The patch is relative to the ET_2012_11 release (though I suspect it would apply to the upcoming 2013_05 release without modification). It passes the TwoPunctures/test/bhns_eval test suite. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1309> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #905: NaNs in ADMBase::gxx using Development Version of ET
by Einstein Toolkit 06 Jun '13

06 Jun '13

#905: NaNs in ADMBase::gxx using Development Version of ET ---------------------------------+------------------------------------------ Reporter: yosef@… | Type: defect Status: new | Priority: major Milestone: | Component: Other Version: | Keywords: ---------------------------------+------------------------------------------ While testing the CCE in the ET, I stumbled across an issue interpolating the admbase::metric at CCTK_POSTSTEP in GLOBAL mode at particular spatial points. The "bug" (or parfile/scheduling error) seems to be sensitive to the exact grid setup. Basically, when I use the qc0-mclachlan-CCE_Cauchy.par parfile, I get nans for gxx. I made a small test thorn that only interpolates gxx at a particular point. Nans show up at iteration 1. attached is the parfile I used and the test thorn. Here is the output from the above test thorn: gxx(3.966899,0.000000,-17.630662) = 1.1160523626974641 at iter 0 on proc 1 gxx(3.966899,0.000000,-17.630662) = 1.1160523626974641 at iter 0 on proc 0 gxx(3.966899,0.000000,-17.630662) = -nan at iter 8 on proc 1 gxx(3.966899,0.000000,-17.630662) = -nan at iter 8 on proc 0 gxx(3.966899,0.000000,-17.630662) = -nan at iter 16 on proc 1 gxx(3.966899,0.000000,-17.630662) = -nan at iter 16 on proc 0 etc.... -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/905> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1256: scheduling MoL_PostStep in Post_Recover_Variables
by Einstein Toolkit 25 May '13

25 May '13

#1256: scheduling MoL_PostStep in Post_Recover_Variables --------------------+------------------------------------------------------- Reporter: rhaas | Owner: Type: task | Status: new Priority: major | Milestone: Component: Cactus | Version: Keywords: MoL | --------------------+------------------------------------------------------- this is not ideal since some routines in MoL_PostStep will always change results (eg. Con2Prim). We already removed MoL_PostStep from the past timelevels since the prolongation cannot be handled properly. Originally (MoL rev 137, https://trac.einsteintoolkit.org/changeset/137/CactusNumerical/MoL) was introduced to enforce boundary conditions and recompute the ADM variables. Since then the policy has changed and the ADM variables are supposed to be checkpointed (rule of thumb is that anything with more than one timelevels should be checkpointed). When recovering from a checkpoint the boundary conditions are currently satisfied since CarpetIOHDF5 reads in everything that it can, incl. data in ghost and boundary zones. This method ensures that bit identical data is read in. Unfortunately running MoL_PostStep then changes values. It seems as if MoL_PostStep is never required so should not be run. The attached trivial patch adds a parameter to MoL to disable running in Post_Recover_Variables. Note that this is not yet are request for review but a work item since more testing is required to decide if anything breaks when MoL_PostStep is not run. Tests done with GRHydro (and changes so that eg. the atmosphere mask is identical in ghost zones [currently it is not valid in ghost zones but also never checked in ghost zones]) gives bit identical results even when changing the number of processors while recovering. This is a very simple test though. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1256> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1297: Reduce time spent in cycling timelevels if there is only one timelevel.
by Einstein Toolkit 24 May '13

24 May '13

#1297: Reduce time spent in cycling timelevels if there is only one timelevel. --------------------------------------+------------------------------------- Reporter: diener | Owner: eschnett Type: enhancement | Status: new Priority: major | Milestone: Component: Carpet | Version: development version Keywords: performance optimization | --------------------------------------+------------------------------------- I noticed in a run with gridfunctions with only 1 timelevels that a significant amount of time was spent cycling timelevels. The attached patch makes the routine bypass a lot of code, if a grid variable only has 1 timelevel. This reduces the total time spent in cycling timelevels from 417 s to 0.8 s for a run of 32767 iterations. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1297> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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Trac April 2013