The current solve function seems rather verbose: the output from the
Poisson demo (with PETSc 3.2) is the below. Where does this output come
from and is it intentional?
--
Solving linear variational problem.
KSP Object: 1 MPI processes
type: preonly
maximum iterations=10000, initial guess is zero
tolerances: relative=1e-05, absolute=1e-50, divergence=10000
left preconditioning
using NONE norm type for convergence test
PC Object: 1 MPI processes
type: lu
LU: out-of-place factorization
tolerance for zero pivot 1e-12
using diagonal shift to prevent zero pivot
matrix ordering: nd
factor fill ratio given 0, needed 0
Factored matrix follows:
Matrix Object: 1 MPI processes
type: seqaij
rows=1089, cols=1089
package used to perform factorization: umfpack
total: nonzeros=0, allocated nonzeros=0
total number of mallocs used during MatSetValues calls =0
not using I-node routines
UMFPACK run parameters:
Control[UMFPACK_PRL]: 1
Control[UMFPACK_STRATEGY]: 0
Control[UMFPACK_DENSE_COL]: 0.2
Control[UMFPACK_DENSE_ROW]: 0.2
Control[UMFPACK_AMD_DENSE]: 10
Control[UMFPACK_BLOCK_SIZE]: 32
Control[UMFPACK_FIXQ]: 0
Control[UMFPACK_AGGRESSIVE]: 1
Control[UMFPACK_PIVOT_TOLERANCE]: 0.1
Control[UMFPACK_SYM_PIVOT_TOLERANCE]: 0.001
Control[UMFPACK_SCALE]: 1
Control[UMFPACK_ALLOC_INIT]: 0.7
Control[UMFPACK_DROPTOL]: 0
Control[UMFPACK_IRSTEP]: 0
Control[UMFPACK_ORDERING]: AMD (not using the PETSc ordering)
linear system matrix = precond matrix:
Matrix Object: 1 MPI processes
type: seqaij
rows=1089, cols=1089
total: nonzeros=7361, allocated nonzeros=7361
total number of mallocs used during MatSetValues calls =0
not using I-node routines
--
Marie
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