[Users] Problems with regridding?
Geraint Pratten
g.pratten at sussex.ac.uk
Wed Feb 24 07:51:23 CST 2016
Hi everyone,
I've been playing around with grids under the assumption that there is no
reflection symmetry and I seem to be hitting a problem when Carpet goes to
regrid. The system evolves for ~ 80M quite happily but it hits a point
where it attempts to regrid levels 1 and up causing all sorts of havoc,
notably the measure of the Hamiltonian constraint blows up until the
simulation gracefully terminates due to NaNs.
I've attached a portion of the output for the simulation where it is
initially evolving quite happily and then the simulation regrids (line
1560+) and becomes unstable (see 4th column of line 1689 for *STRAINTS::H
maximum, this eventually just goes off to ~ 10^{230} and dies).
I'm presuming that when it tries to regrid levels 1 and up it's introducing
some bad data along the way?
The other issue that I'm not completely sure on is related to the warning
being thrown up by QuasiLocalMeasures:
WARNING level 3 from host i23r01c06s07.sm.lrz.de process 0
while executing schedule bin CCTK_ANALYSIS, routine
QuasiLocalMeasures::qlm_calculate
in thorn QuasiLocalMeasures, file qlm_killing_transport.F90:123:
-> Did not manage to find an eigenvector with the eigenvalue 1
WARNING level 2 from host i23r01c06s07.sm.lrz.de process 0
while executing schedule bin CCTK_ANALYSIS, routine
QuasiLocalMeasures::qlm_calculate
in thorn QuasiLocalMeasures, file qlm_killing_normalisation.F90:96:
-> Integration path starts out too steep
WARNING level 2 from host i23r01c06s07.sm.lrz.de process 0
while executing schedule bin CCTK_ANALYSIS, routine
QuasiLocalMeasures::qlm_calculate
in thorn QuasiLocalMeasures, file qlm_killing_normalisation.F90:96:
-> Integration path starts out too steep
WARNING level 2 from host i23r01c06s07.sm.lrz.de process 0
while executing schedule bin CCTK_ANALYSIS, routine
QuasiLocalMeasures::qlm_calculate
in thorn QuasiLocalMeasures, file qlm_killing_normalisation.F90:96:
-> Integration path starts out too steep
WARNING level 2 from host i23r01c06s07.sm.lrz.de process 0
while executing schedule bin CCTK_ANALYSIS, routine
QuasiLocalMeasures::qlm_calculate
in thorn QuasiLocalMeasures, file qlm_killing_normalisation.F90:96:
-> Integration path starts out too steep
WARNING level 2 from host i23r01c06s07.sm.lrz.de process 0
while executing schedule bin CCTK_ANALYSIS, routine
QuasiLocalMeasures::qlm_calculate
in thorn QuasiLocalMeasures, file qlm_killing_normalisation.F90:96:
-> Integration path starts out too steep
WARNING level 2 from host i23r01c06s07.sm.lrz.de process 0
while executing schedule bin CCTK_ANALYSIS, routine
QuasiLocalMeasures::qlm_calculate
in thorn QuasiLocalMeasures, file qlm_killing_normalisation.F90:96:
-> Integration path starts out too steep
Can anyone help with this or has anyone seen similar issues before?
Something is clearly not set up correctly but I can't see where my error
is. If you need any other information, just let me know!
Thanks in advance! Any help is very much appreciated!
Geraint
------------------
For reference, the various Carpet settings that I use are as follows:
#------
# Grid:
#------
Time::dtfac = 0.25
MoL::ODE_Method = "rk4"
MoL::MoL_Intermediate_Steps = 4
MoL::MoL_Num_Scratch_Levels = 1
#------------------------------
# Carpet Coord. Grid 3D
#------------------------------
CartGrid3D::type = "coordbase"
CartGrid3D::domain = "full"
CartGrid3D::avoid_origin = "no"
#------------------------------
# Carpet Coord. Base
#------------------------------
CoordBase::domainsize = "minmax"
CoordBase::spacing = "gridspacing" # "gridspacing" or "numcells"
CoordBase::xmin = -614.40
CoordBase::ymin = -614.40
CoordBase::zmin = -614.40
CoordBase::xmax = 614.40
CoordBase::ymax = 614.40
CoordBase::zmax = 614.40
CoordBase::dx = 15.36 # dx or ncells_x, nx = 80
CoordBase::dy = 15.36 # dy or ncells_y, nx = 80
CoordBase::dz = 15.36 # dz or ncells_z, nx = 80
CoordBase::boundary_size_x_lower = 5
CoordBase::boundary_size_y_lower = 5
CoordBase::boundary_size_z_lower = 5
CoordBase::boundary_size_x_upper = 5
CoordBase::boundary_size_y_upper = 5
CoordBase::boundary_size_z_upper = 5
CoordBase::boundary_shiftout_x_lower = 0
CoordBase::boundary_shiftout_y_lower = 0
CoordBase::boundary_shiftout_z_lower = 0
CoordBase::boundary_shiftout_x_upper = 0
CoordBase::boundary_shiftout_y_upper = 0
CoordBase::boundary_shiftout_z_upper = 0
#------------------------------
# Driver: Ghost Size
#------------------------------
Driver::ghost_size = 5
#------------------------------
# Specify Reflection Symmetries
#------------------------------
ReflectionSymmetry::reflection_x = "no"
ReflectionSymmetry::reflection_y = "no"
ReflectionSymmetry::reflection_z = "no"
ReflectionSymmetry::avoid_origin_x = "no"
ReflectionSymmetry::avoid_origin_y = "no"
ReflectionSymmetry::avoid_origin_z = "no"
#------------------------------
# General Carpet Parameters
#------------------------------
Carpet::domain_from_coordbase = "yes"
Carpet::enable_all_storage = "no"
Carpet::use_buffer_zones = "yes"
Carpet::schedule_barriers = "no"
Carpet::poison_new_timelevels = "yes"
Carpet::check_for_poison = "no"
#Carpet::poison_value = 113 # git version only!
Carpet::init_3_timelevels = "no"
Carpet::init_fill_timelevels = "yes"
CarpetLib::poison_new_memory = "yes"
CarpetLib::poison_value = 114
CarpetLib::check_bboxes = "no"
CarpetLib::interleave_communications = "yes"
#CarpetLib::vary_tags = "yes" # git version
only!
CarpetLib::combine_sends = "yes"
#CarpetLib::reduce_mpi_waitall = "yes" # git version only!
CarpetInterp::tree_search = "yes"
CarpetInterp::check_tree_search = "no"
CarpetRegrid2::freeze_unaligned_levels = "yes"
#CarpetRegrid2::snap_to_coarse = "yes"
CarpetRegrid2::symmetry_rotating180 = "no"
CarpetRegrid2::min_fraction = 1
# System specific Carpet parameters
Carpet::time_refinement_factors = "[1, 1, 2, 4, 8, 16, 32, 64, 128, 256,
512, 1024]" # Should check this...?
Carpet::max_refinement_levels = 12
Carpet::prolongation_order_space = 5
Carpet::prolongation_order_time = 2
CarpetRegrid2::regrid_every = 64
CarpetRegrid2::num_centres = 2
CarpetRegrid2::num_levels_1 = 12
CarpetRegrid2::position_x_1 = 2.00393
CarpetRegrid2::radius_1[ 1] = 307.2
CarpetRegrid2::radius_1[ 2] = 230.4
CarpetRegrid2::radius_1[ 3] = 153.6
CarpetRegrid2::radius_1[ 4] = 105.6
CarpetRegrid2::radius_1[ 5] = 38.4
CarpetRegrid2::radius_1[ 6] = 14.4
CarpetRegrid2::radius_1[ 7] = 4.8
CarpetRegrid2::radius_1[ 8] = 2.4
CarpetRegrid2::radius_1[ 9] = 1.2
CarpetRegrid2::radius_1[10] = 0.6
CarpetRegrid2::radius_1[11] = 0.3
CarpetRegrid2::movement_threshold_1 = 0.075
CarpetRegrid2::num_levels_2 = 12
CarpetRegrid2::position_x_2 = -6.01178
CarpetRegrid2::radius_2[ 1] = 307.2
CarpetRegrid2::radius_2[ 2] = 230.4
CarpetRegrid2::radius_2[ 3] = 153.6
CarpetRegrid2::radius_2[ 4] = 105.6
CarpetRegrid2::radius_2[ 5] = 38.4
CarpetRegrid2::radius_2[ 6] = 14.4
CarpetRegrid2::radius_2[ 7] = 4.8
CarpetRegrid2::radius_2[ 8] = 2.4
CarpetRegrid2::radius_2[ 9] = 1.2
CarpetRegrid2::radius_2[10] = 0.6
CarpetRegrid2::radius_2[11] = 0.3
CarpetRegrid2::movement_threshold_2 = 0.075
CarpetMask::excluded_surface [0] = 0
CarpetMask::excluded_surface_factor[0] = 1.0
CarpetMask::excluded_surface [1] = 1
CarpetMask::excluded_surface_factor[1] = 1.0
CarpetMask::excluded_surface [2] = 2
CarpetMask::excluded_surface_factor[2] = 1.0
CarpetTracker::surface[0] = 0
CarpetTracker::surface[1] = 1
--
Geraint Pratten
Postdoctoral Research Associate
Mobile: +44(0) 7581709282
E-mail: G.Pratten at sussex.ac.uk
Skype: geraint.pratten
School of Mathematical and Physical Sciences
Pevensey 3 Building
University of Sussex
Falmer Campus
Brighton
BN1 9QH
United Kingdom
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