Trac October 2025

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#2890: CarpetX: crash/failed assertion in Z4c_RHS
by Miren Radia 10 Oct '25

10 Oct '25

#2890: CarpetX: crash/failed assertion in Z4c_RHS Reporter: Miren Radia Status: open Milestone: Version: development version Type: bug Priority: major Component: CarpetX Comment (by Miren Radia): I tried again with the main branches of CarpetX/SpacetimeX rather than Liwei’s development ones $i.e. without subcycling$ and ran into a different problem related to the PunctureTracker thorn. I’ll open a new ticket since I think it’s a separate issue. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2890/carpetx-crash-fai…

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#2052: piraha assumes that assert(false) always aborts
by Steven R. Brandt 09 Oct '25

09 Oct '25

#2052: piraha assumes that assert(false) always aborts Reporter: Roland Haas Status: resolved Milestone: Version: development version Type: bug Priority: minor Component: Cactus Changes (by Steven R. Brandt): status: resolved (was open) I recently tried compiling Cactus with the Cray compiler on BW and get (among other things) warnings like this: CC-940 crayc++: WARNING File = src/piraha/Piraha.hpp, Line = 326 A "return" statement is missing from the end of a non-void function "cctki_piraha::LookAhead::match". bool match(Matcher *m) { assert(false); }//TODO: Fill in which is indeed a bug. If one defines NDEBUG (as is done for the highly optimized option lists) then assert() is a no-op and the function (if it was called) returned garbage. I see three solutions: 1. call CCTK_Abort() 1. add a "return false;" or so 1. remove the whole function definition. I think C++ does not mind if declared member functions of a class are not defined, just so long as they are never actually called. This would have the advantage of generating a compile time error as well rather than a run-time error. **Keyword:** piraha Comment (by Steven R. Brandt): Applied previously. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2052/piraha-assumes-th…

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#2891: ExternalLibraries/AMReX: New configuration variable AMREX_CMAKE_CUDA_ARCHITECTURES
by Erik Schnetter 09 Oct '25

09 Oct '25

#2891: ExternalLibraries/AMReX: New configuration variable AMREX_CMAKE_CUDA_ARCHITECTURES Reporter: Erik Schnetter Status: new Milestone: Version: Type: enhancement Priority: major Component: EinsteinToolkit thorn [https://github.com/EinsteinToolkit/ExternalLibraries-AMReX/pull/1](https://… Add a new configuration variable AMREX\_CMAKE\_CUDA\_ARCHITECTURES that allows choosing the set of supported CUDA architectures at build time. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2891/externallibraries…

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#2846: added PreSync support in regrid
by Steven R. Brandt 09 Oct '25

09 Oct '25

#2846: added PreSync support in regrid Reporter: Roland Haas Status: resolved Milestone: Version: Type: enhancement Priority: major Component: EinsteinToolkit thorn Changes (by Steven R. Brandt): status: resolved (was new) Comment (by Steven R. Brandt): Merged. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2846/added-presync-sup…

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#2890: CarpetX: crash/failed assertion in Z4c_RHS
by Miren Radia 09 Oct '25

09 Oct '25

#2890: CarpetX: crash/failed assertion in Z4c_RHS Reporter: Miren Radia Status: open Milestone: Version: development version Type: bug Priority: major Component: CarpetX Comment (by Miren Radia): > The problem is likely that the grid is too small for the given number of GPUs. I’m not sure about this. I only ran on a single GPU $initially I started on 8 but realised that I could reproduce on just 1$ and also started with a more production-sized parameter file with the following grid configuration that reproduces the same problem: ``` $nlevels = 10 CarpetX::xmin = -512.0 CarpetX::ymin = -512.0 CarpetX::zmin = -512.0 CarpetX::xmax = 512.0 CarpetX::ymax = 512.0 CarpetX::zmax = 512.0 CarpetX::ncells_x = 128 CarpetX::ncells_y = 128 CarpetX::ncells_z = 128 CarpetX::max_num_levels = $nlevels CarpetX::regrid_every = 128 CarpetX::regrid_error_threshold = 0.03125 BoxInBox::num_regions = 2 # Region 1 BoxInBox::shape_1 = "cube" BoxInBox::num_levels_1 = $nlevels BoxInBox::radius_1 = [256.0,128.0,64.0,42.535384,21.267692,10.633846,5.316923,2.658462,1.329231,0.664615] BoxInBox::position_x_1 = 4.461538461538462 # Region 2 BoxInBox::shape_2 = "cube" BoxInBox::num_levels_2 = $nlevels BoxInBox::radius_2 = [256.0,128.0,64.0,34.264616,17.132308,8.566154,4.283077,2.141538,1.070769,0.535385] BoxInBox::position_x_2 = -5.538461538461538 ``` I just made the grid configuration smaller for the purposes of reporting in this ticket as it’s quicker to run. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2890/carpetx-crash-fai…

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#2878: CarpetX: Add multipatch output support to Silo
by Roland Haas 08 Oct '25

08 Oct '25

#2878: CarpetX: Add multipatch output support to Silo Reporter: Lucas Timotheo Sanches Status: resolved Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit thorn Changes (by Roland Haas): status: resolved (was open) -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2878/carpetx-add-multi…

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#2878: CarpetX: Add multipatch output support to Silo
by Roland Haas 08 Oct '25

08 Oct '25

#2878: CarpetX: Add multipatch output support to Silo Reporter: Lucas Timotheo Sanches Status: open Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit thorn Comment (by Roland Haas): Applied as git hash [0f935634](https://github.com/EinsteinToolkit/CarpetX/commits/0f935634fcd3d4… "Merge pull request #337 from EinsteinToolkit/eschnett/silo-multipatch" of [CarpetX](https://github.com/EinsteinToolkit/CarpetX) -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2878/carpetx-add-multi…

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#2890: CarpetX: crash/failed assertion in Z4c_RHS
by Erik Schnetter 08 Oct '25

08 Oct '25

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#2890: CarpetX: crash/failed assertion in Z4c_RHS
by Roland Haas 08 Oct '25

08 Oct '25

#2890: CarpetX: crash/failed assertion in Z4c_RHS Reporter: Miren Radia Status: open Milestone: Version: development version Type: bug Priority: major Component: CarpetX Changes (by Roland Haas): status: open (was submitted) -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2890/carpetx-crash-fai…

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#2890: CarpetX: crash/failed assertion in Z4c_RHS
by Miren Radia 07 Oct '25

07 Oct '25

#2890: CarpetX: crash/failed assertion in Z4c_RHS Reporter: Miren Radia Status: submitted Milestone: Version: development version Type: bug Priority: major Component: CarpetX Changes (by Miren Radia): Hello, I’ve been trying to run a BH binary simulation with CarpetX on [tursa](https://epcced.github.io/dirac-docs/tursa-user-guide/hardware/) $Nvidia A100 GPUs$ but I seem to be running into problems with the code crashing/assertions failing that I can’t resolve. I have been using Liwei Ji’s development branches in order to use subcycling $following the guidance described [here](https://github.com/lwJi/Tutorial-Subcycling)$ so it’s possible my problems are related to this. Please find attached the following: * My thornlist: `carpetx-subcycling.th` * My parameter file: `test-bbh.par` $this is a very low resolution/small configuration just to reproduce the crash. I was originally trying something bigger$ * My OptionsList: `tursa.cfg` * The full output from running the code through `cuda-gdb` including a backtrace at the failed assertion and printing out some variables that seem to be leading to the failed assertion: `test-bbh-debug.out` Here’s the end of the output printed from the simulation $I have increased the verbosity$: ``` INFO (CarpetX): Starting evolution... INFO (CarpetX): Regridding... INFO (CarpetX): Setting max_grid_size values for all levels before regridding INFO (CarpetX): ErrorEst patch 0 level 0 INFO (CarpetX): ErrorEst patch 0 level 0 done. Set/clear/total=288/3808/4096=7%/93%/100% INFO (CarpetX): old levels 2, new levels 2 INFO (CarpetX): level 0: 1 boxes, 4096 cells (100%) INFO (CarpetX): level 1: 1 boxes, 8192 cells (25%, 25%) INFO (CarpetX): ScheduleTraverseGH iteration 1 CCTK_PRESTEP INFO (CarpetX): ScheduleTraverseGH iteration 1 CCTK_EVOL INFO (CarpetX): CallFunction iteration 1 CCTK_EVOL: ODESolvers::ODESolvers_Solve_Subcycling INFO (ODESolvers): Integrator is RK4 INFO (ODESolvers): Integrating 22 variables INFO (CarpetX): SyncGroupsProlongateOnly Z4C::CHI_OLD, Z4C::GAMMA_TILDE_OLD, Z4C::K_HAT_OLD, Z4C::A_TILDE_OLD, Z4C::GAM_TILDE_OLD, Z4C::THETA_OLD, Z4C:: ALPHAG_OLD, Z4C::BETAG_OLD INFO (CarpetX): SyncGroupsProlongateOnly Z4C::CHI_K1, Z4C::GAMMA_TILDE_K1, Z4C::K_HAT_K1, Z4C::A_TILDE_K1, Z4C::GAM_TILDE_K1, Z4C::THETA_K1, Z4C::ALPHAG _K1, Z4C::BETAG_K1 INFO (CarpetX): SyncGroupsProlongateOnly Z4C::CHI_K2, Z4C::GAMMA_TILDE_K2, Z4C::K_HAT_K2, Z4C::A_TILDE_K2, Z4C::GAM_TILDE_K2, Z4C::THETA_K2, Z4C::ALPHAG _K2, Z4C::BETAG_K2 INFO (CarpetX): SyncGroupsProlongateOnly Z4C::CHI_K3, Z4C::GAMMA_TILDE_K3, Z4C::K_HAT_K3, Z4C::A_TILDE_K3, Z4C::GAM_TILDE_K3, Z4C::THETA_K3, Z4C::ALPHAG _K3, Z4C::BETAG_K3 INFO (CarpetX): SyncGroupsProlongateOnly Z4C::CHI_K4, Z4C::GAMMA_TILDE_K4, Z4C::K_HAT_K4, Z4C::A_TILDE_K4, Z4C::GAM_TILDE_K4, Z4C::THETA_K4, Z4C::ALPHAG _K4, Z4C::BETAG_K4 INFO (ODESolvers): Set interior old state at t=0, to be prolongated later INFO (ODESolvers): Fill refinement boundary ghost zones using Ys for stage #1 at t=0 INFO (ODESolvers): Calculating RHS #1 at t=0 INFO (CarpetX): CallFunction iteration 1 Z4c_RHSGroup: Z4c::Z4c_RHS terminate called recursively terminate called after throwing an instance of 'std::runtime_error' what(): Assertion `this->domain.numPts() > 0' failed, file "/mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scrat ch/build/AMReX/amrex-24.10/Src/Base/AMReX_BaseFab.H", line 1930 ``` Here’s the relevant part of the backtrace: ```none #0 0x000015554c8de52f in raise () from /lib64/libc.so.6 #1 0x000015554c8b1e65 in abort () from /lib64/libc.so.6 #2 0x000015554d176bd9 in __gnu_cxx::__verbose_terminate_handler () at ../../../../libstdc++-v3/libsupc++/vterminate.cc:95 #3 0x000015554d18225a in __cxxabiv1::__terminate (handler=<optimized out>) at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:48 #4 0x000015554d1812c9 in __cxa_call_terminate (ue_header=0x63b60110) at ../../../../libstdc++-v3/libsupc++/eh_call.cc:54 #5 0x000015554d1819e6 in __gxx_personality_v0 (version=<optimized out>, actions=6, exception_class=5138137972254386944, ue_header=<optimized out>, context=0x7fffffff46c0) at ../../../../libstdc++-v3/libsupc++/eh_personality.cc:688 #6 0x000015554cc7cd64 in _Unwind_RaiseException_Phase2 (exc=0x63b60110, context=0x7fffffff46c0, frames_p=0x7fffffff47b0) at ../../../libgcc/unwind.inc:64 #7 0x000015554cc7d421 in _Unwind_RaiseException (exc=0x63b60110) at ../../../libgcc/unwind.inc:136 #8 0x000015554d18250a in __cxa_throw (obj=<optimized out>, tinfo=0x52feb9e0 <typeinfo for std::runtime_error@@GLIBCXX_3.4>, dest=0x423c00 <std::runtime_error::~runtime_error()@plt>) at ../../../../libstdc++-v3/libsupc++/eh_throw.cc:93 #9 0x0000000002d5bab7 in amrex::Assert_host (EX=0x437ad0f "this->domain.numPts() > 0", file=0x4379500 "/mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scratch/build/AMReX/amrex-24.10/Src/Base/AMReX_B aseFab.H", line=1930, msg=0x0 <cub::CUB_200200_600_610_700_750_800_860_NS::EmptyKernel<void>()>) at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scratch/build/AMReX/amrex-24.10/Src/Base/AMReX.cpp:292 #10 0x0000000002e58032 in amrex::Assert (msg=0x0 <cub::CUB_200200_600_610_700_750_800_860_NS::EmptyKernel<void>()>, line=1930, file=0x4379500 "/mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scratch/build/AMReX/amrex-24.10/Src/Base/AMReX_B aseFab.H", EX=0x437ad0f "this->domain.numPts() > 0") at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scratch/build/AMReX/amrex-24.10/Src/Base/AMReX.H:186 #11 amrex::BaseFab<double>::define (this=0x7fffffff5a08) at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scratch/build/AMReX/amrex-24.10/Src/Base/AMReX_BaseFab.H:1930 #12 0x0000000002e55e09 in amrex::BaseFab<double>::BaseFab (this=0x7fffffff5a08, bx=..., n=154, ar=0x5458ddc0) at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scratch/build/AMReX/amrex-24.10/Src/Base/AMReX_BaseFab.H:1970 #13 0x0000000002e4fe32 in amrex::FArrayBox::FArrayBox (this=0x7fffffff5a08, b=..., ncomp=154, ar=0x5458ddc0) at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/configs/sim-debug/scratch/build/AMReX/amrex-24.10/Src/Base/AMReX_FArrayBox.cpp: 115 #14 0x0000000001a860a6 in Loop::GF3D5vector<double>::make_fab (layout=..., nvars=154) at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/arrangements/CarpetX/Loop/src/loop.hxx:1566 #15 0x0000000001a83166 in Loop::GF3D5vector<double>::GF3D5vector (this=0x7fffffff59d0, layout=..., nvars=154) at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/arrangements/CarpetX/Loop/src/loop.hxx:1570 #16 0x0000000001ab399f in Z4c_RHS (cctkGH=0x155530004ed0) at /mnt/lustre/tursafs1/home/dp325/dp325/dc-radi1/ETK/Cactus-CarpetX/arrangements/SpacetimeX/Z4c/src/rhs.cxx:97 ``` The software versions I am using are: * GCC 12.2.0 * CUDA 12.3 * Open MPI 4.1.5 Please let me know if any further information would be helpful to debug this. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2890/carpetx-crash-fai…

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