[petsc-users] Using MUMPS as a preconditioner for KSPSolve()

Dear PETSC Users, I tried to use a Cholesky factor (MUMPS results) as a preconditioner for KSPSolve(). An example code is pasted below. When the code runs, the log file indicates that Job=3 (i.e. backward/forward substitution) of MUMPS is called every time inside the loop. Is there anyway to

Re: [petsc-users] Using MUMPS as a preconditioner for KSPSolve()

On Fri, Dec 5, 2014 at 2:11 PM, Evan Um eva...@gmail.com wrote: Dear PETSC Users, I tried to use a Cholesky factor (MUMPS results) as a preconditioner for KSPSolve(). An example code is pasted below. When the code runs, the log file indicates that Job=3 (i.e. backward/forward substitution)

Re: [petsc-users] Using MUMPS as a preconditioner for KSPSolve()

Dear Matt, Thanks for your quick reply. I mean avoiding MUMPS's internal back/forward solvers (JOB=3). Does KSPSOLVE() have its own back/forward routines? Evan On Fri, Dec 5, 2014 at 12:20 PM, Matthew Knepley knep...@gmail.com wrote: On Fri, Dec 5, 2014 at 2:11 PM, Evan Um eva...@gmail.com

Re: [petsc-users] Using MUMPS as a preconditioner for KSPSolve()

On Fri, Dec 5, 2014 at 2:31 PM, Evan Um eva...@gmail.com wrote: Dear Matt, Thanks for your quick reply. I mean avoiding MUMPS's internal back/forward solvers (JOB=3). Does KSPSOLVE() have its own back/forward routines? 1) MUMPS stores these in its own format, so code from other packages