New bssn_em_rhs_c.C computes EM field RHS (E,B,Kpsi,Kphi) and stress-energy
tensor, then calls the C BSSN RHS kernel with source terms. Replaces empart.f90
when USE_CXX_EM_KERNEL=1. Supports all ghost_width orders via existing derivative
kernels. Controlled by USE_CXX_EM_KERNEL switch (default 0, experimental).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
New files provide C equivalents of Fortran diff_new_sh.f90 and kodiss_sh.f90:
- fderivs_sh_c.C: first derivatives in shell (rho, sigma, R) coords
- fdderivs_sh_c.C: second derivatives in shell coords
- fderivs_shc_c.C: shell first derivs + chain rule to Cartesian
- fdderivs_shc_c.C: shell second derivs + chain rule to Cartesian
- kodiss_sh_c.C: Kreiss-Oliger dissipation on shell patches
Also add symmetry_stbd() C implementation and shell fh indexing to share_func.h.
Controlled by USE_CXX_SHELL_KERNELS switch (default 0, experimental).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Wrap each C kernel in #if (ghost_width == N) blocks matching Fortran stencil
coefficients from diff_new.f90, kodiss.f90, and lopsidediff.f90. Add fast-path
indexing for ord=1,4,5 in share_func.h.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Static scheduling has lower overhead than guided for uniform workloads
(grid points all have equal computational cost).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Split prolongpointstru into search-only (prolongpointstru_search) and
append-only (prolongpointstru_append) functions. The search is read-only
and thread-safe; each thread builds private linked lists via
prolongpointstru_append, merged after the parallel loop.
This eliminates critical-section contention and delivers ~2.2x speedup:
setupintintstuff: 511s -> 252s, total init: 592s -> 267s.
Also add -qopenmp to ShellPatch.o compilation via makefile override rule
and <omp.h> include with _OPENMP guards + fallback stubs.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
bssnEScalar_class::Initialize() already calls setup_transfer_caches(),
but bssnEM_class::Initialize() did not. When USE_TRANSFER_CACHE=1,
the sync_cache pointers remain NULL, causing SIGSEGV in wrapper
methods that dereference sync_cache_*[lev].
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Seven Parallel::*_cached() calls in RestrictProlong and
RestrictProlong_aux were missed during the transfer-cache refactoring
(commits 9cd3741..8d28c29). When BSSN_USE_TRANSFER_CACHE=0, all
sync_cache pointers are NULL, so dereferencing sync_cache_*[lev]
triggers SIGSEGV.
Replace them with the equivalent wrapper methods (sync_evolution,
restrict_evolution, outbdlow2hi_evolution) that check
use_transfer_cache() and fall back to uncached direct calls.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
- compute fi_min/fi_max from output i-range and derive ii_lo/ii_hi
- replace full ii sweep (-1:extf(1)) with windowed sweep in Z/Y precompute passes
- keep stencil math unchanged; add bounds sanity check for ii window
