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8e02a99a11
Complete the integration of the nested (MATNEST) operator into the standard
PSBLAS infrastructure:
- Preconditioners: implement get_diag and csgetrow on psb_d_nest_base_mat so
the stock one-level preconditioners build directly on the nested operator
(DIAG through the concatenated block diagonals, BJAC through the
format-agnostic csget path used by the ILU factorizations).
- Configurable block storage: psb_d_nest_rect_block and psb_d_nest_matrix%asb
accept an optional type ('CSR' default, 'CSC', 'COO') or mold (any class
extending psb_d_base_sparse_mat, e.g. the psb_ext ELL/HLL formats); the
operator is format-agnostic since every operation delegates to the blocks.
- Device-capable matvec: override vect_mv to gather/scatter through the
vectors' own gth/sct with encapsulated index vectors (device kernels on
device vectors) and to run each block through its vect_mv, so device block
formats execute their native kernels; bit-equivalent to csmv on host.
- Full psb_d_base_sparse_mat contract by delegation to the blocks: transposed
csmv (dedicated kernel, ghost contributions left to the transposed halo
exchange), multi-RHS csmm, cp_to_coo/mv_to_coo (unlocking cscnv, csclip,
tril/triu through the base generics), rowsum/arwsum/colsum/aclsum,
maxval/spnmi/spnm1, scal (left/right) and scals, clone (view semantics:
shared blocks, re-owned index maps), mold, sizeof. cp_from_coo/mv_from_coo,
csput and cssv/cssm are intentionally left to the base error (meaningless
for a block-operator view), documented in the type and in the README.
Tests: glob assembles the blocks in HLL (psb_ext) and rect in CSC, both still
bit-identical to the monolithic CSR oracle; the CG test solves under NONE,
DIAG and BJAC/ILU(0), requiring convergence to the exact solution for all of
them and DIAG bit-identical to NONE (exactness check of the nested get_diag).
README updated with the user API reference, the preconditioner section and
the implemented-contract section.
Author: Simone Staccone (Stack-1)
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2 weeks ago | |
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| .. | ||
| auxil | 3 weeks ago | |
| comm | 3 weeks ago | |
| modules | 2 weeks ago | |
| psblas | 3 weeks ago | |
| serial | 4 weeks ago | |
| tools | 3 weeks ago | |
| CMakeLists.txt | 2 weeks ago | |
| Makefile | 6 months ago | |