The subdomain KSP (flow_sub_) has type "preonly" so it always does exactly one iteration. If you were to use an iterative subdomain solver (e.g., -flow_sub_ksp_type gmres) then those tolerances would be used.
HeeHo Park <[email protected]> writes: > Hi, I'm running PFLOTRAN and in PFLOTRAN, we have flow_ and flow_sub_ > processes. I was wondering what the red underlined values meant (each block > tolerance?) and how to change them (would it affect convergence?). Blue > marked bold values are changed from the default values for linear solvers. > > FLOW Linear Solver > solver: bcgs > preconditioner: asm > *atol: 1.000000E-10* > * rtol: 1.000000E-10* > dtol: 1.000000E+04 > maximum iteration: 10000 > KSP Object: (flow_) 8 MPI processes > type: bcgs > maximum iterations=10000, initial guess is zero > tolerances: * relative=1e-10, absolute=1e-10*, divergence=10000. > left preconditioning > using PRECONDITIONED norm type for convergence test > PC Object: (flow_) 8 MPI processes > type: asm > Additive Schwarz: total subdomain blocks = 8, amount of overlap = 1 > Additive Schwarz: restriction/interpolation type - RESTRICT > [0] number of local blocks = 1 > [1] number of local blocks = 1 > [2] number of local blocks = 1 > [3] number of local blocks = 1 > [4] number of local blocks = 1 > [5] number of local blocks = 1 > [6] number of local blocks = 1 > [7] number of local blocks = 1 > Local solve info for each block is in the following KSP and PC objects: > - - - - - - - - - - - - - - - - - - > [0] local block number 0, size = 1389 > KSP Object: (flow_sub_) 1 MPI processes > type: preonly > maximum iterations=10000, initial guess is zero >>>> tolerances: *relative=1e-05, absolute=1e-50*, divergence=10000. > left preconditioning > using DEFAULT norm type for convergence test > PC Object: (flow_sub_) 1 MPI processes > type: ilu > PC has not been set up so information may be incomplete > out-of-place factorization > 0 levels of fill > tolerance for zero pivot 2.22045e-14 > using diagonal shift on blocks to prevent zero pivot [INBLOCKS] > matrix ordering: natural > linear system matrix = precond matrix: > Mat Object: (flow_) 1 MPI processes > type: seqbaij > rows=1389, cols=1389, bs=3 > total: nonzeros=20025, allocated nonzeros=20025 > total number of mallocs used during MatSetValues calls =0 > block size is 3 > - - - - - - - - - - - - - - - - - - > > -- > HeeHo Daniel Park
