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Matrix key: WEST0067
UMFPACK V5.1.0 (May 31, 2007), Control:
Matrix entry defined as: double
Int (generic integer) defined as: int
0: print level: 2
1: dense row parameter: 0.2
"dense" rows have > max (16, (0.2)*16*sqrt(n_col) entries)
2: dense column parameter: 0.2
"dense" columns have > max (16, (0.2)*16*sqrt(n_row) entries)
3: pivot tolerance: 0.1
4: block size for dense matrix kernels: 32
5: strategy: 0 (auto)
6: initial allocation ratio: 0.7
7: max iterative refinement steps: 2
12: 2-by-2 pivot tolerance: 0.01
13: Q fixed during numerical factorization: 0 (auto)
14: AMD dense row/col parameter: 10
"dense" rows/columns have > max (16, (10)*sqrt(n)) entries
Only used if the AMD ordering is used.
15: diagonal pivot tolerance: 0.001
Only used if diagonal pivoting is attempted.
16: scaling: 1 (divide each row by sum of abs. values in each row)
17: frontal matrix allocation ratio: 0.5
18: drop tolerance: 0
19: AMD and COLAMD aggressive absorption: 1 (yes)
The following options can only be changed at compile-time:
8: BLAS library used: Fortran BLAS. size of BLAS integer: 4
9: compiled for ANSI C
10: CPU timer is POSIX times ( ) routine.
11: compiled for normal operation (debugging disabled)
computer/operating system: Linux
size of int: 4 UF_long: 8 Int: 4 pointer: 8 double: 8 Entry: 8 (in bytes)
symbolic analysis:
status: 0.
time: 0.00E+00 (sec)
estimates (upper bound) for numeric LU:
size of LU: 0.02 (MB)
memory needed: 0.06 (MB)
flop count: 0.14E+05
nnz (L): 542.
nnz (U): 902.
numeric factorization:
status: 0.
time: 0.00E+00
actual numeric LU statistics:
size of LU: 0.01 (MB)
memory needed: 0.04 (MB)
flop count: 0.25E+04
nnz (L): 323.
nnz (U): 339.
UMFPACK V5.1.0 (May 31, 2007), Info:
matrix entry defined as: double
Int (generic integer) defined as: int
BLAS library used: Fortran BLAS. size of BLAS integer: 4
MATLAB: no.
CPU timer: POSIX times ( ) routine.
number of rows in matrix A: 67
number of columns in matrix A: 67
entries in matrix A: 294
memory usage reported in: 8-byte Units
size of int: 4 bytes
size of UF_long: 8 bytes
size of pointer: 8 bytes
size of numerical entry: 8 bytes
strategy used: unsymmetric
ordering used: colamd on A
modify Q during factorization: yes
prefer diagonal pivoting: no
pivots with zero Markowitz cost: 1
submatrix S after removing zero-cost pivots:
number of "dense" rows: 0
number of "dense" columns: 0
number of empty rows: 0
number of empty columns 0
submatrix S not square or diagonal not preserved
symbolic factorization defragmentations: 1
symbolic memory usage (Units): 1639
symbolic memory usage (MBytes): 0.0
Symbolic size (Units): 252
Symbolic size (MBytes): 0
symbolic factorization CPU time (sec): 0.00
symbolic factorization wallclock time(sec): 0.00
matrix scaled: yes (divided each row by sum of abs values in each row)
minimum sum (abs (rows of A)): 1.00000e+00
maximum sum (abs (rows of A)): 6.59006e+00
symbolic/numeric factorization: upper bound actual %
variable-sized part of Numeric object:
initial size (Units) 1711 1577 92%
peak size (Units) 6115 3581 59%
final size (Units) 1628 682 42%
Numeric final size (Units) 2108 1129 54%
Numeric final size (MBytes) 0.0 0.0 54%
peak memory usage (Units) 7476 4942 66%
peak memory usage (MBytes) 0.1 0.0 66%
numeric factorization flops 1.41920e+04 2.50100e+03 18%
nz in L (incl diagonal) 542 323 60%
nz in U (incl diagonal) 902 339 38%
nz in L+U (incl diagonal) 1377 595 43%
largest front (# entries) 483 80 17%
largest # rows in front 21 10 48%
largest # columns in front 23 11 48%
initial allocation ratio used: 0.7
# of forced updates due to frontal growth: 0
nz in L (incl diagonal), if none dropped 323
nz in U (incl diagonal), if none dropped 339
number of small entries dropped 0
nonzeros on diagonal of U: 67
min abs. value on diagonal of U: 2.74e-02
max abs. value on diagonal of U: 2.28e+00
estimate of reciprocal of condition number: 1.20e-02
indices in compressed pattern: 263
numerical values stored in Numeric object: 599
numeric factorization defragmentations: 1
numeric factorization reallocations: 1
costly numeric factorization reallocations: 0
numeric factorization CPU time (sec): 0.00
numeric factorization wallclock time (sec): 0.00
solve flops: 1.19000e+03
iterative refinement steps taken: 0
iterative refinement steps attempted: 0
solve CPU time (sec): 0.00
solve wall clock time (sec): 0.00
total symbolic + numeric + solve flops: 3.69100e+03
norm (A*x-b): 0.
norm (A*x-b): 0.
norm (A*x-b): 0.
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