Justin Chang
> *Cc:* Smith, Barry F.; petsc-users@mcs.anl.gov
> *Subject:* Re: [petsc-users] BJACOBI with FIELDSPLIT
>
>
> Thanks, using fgmres it does work as expected.
>
> I thought gmres would do the same since I'm solving the subblocks
> "exactly".
>
>
&
On Mon, Mar 18, 2019 at 3:18 PM Rossi, Simone via petsc-users <
petsc-users@mcs.anl.gov> wrote:
> Dear all,
>
> I'm debugging my application in which I'm trying to use the FIELDSPLIT
> preconditioner for solving a 2x2 block matrix.
>
>
> Currently I'm testing the preconditioner on a decoupled
: [petsc-users] BJACOBI with FIELDSPLIT
Thanks, using fgmres it does work as expected.
I thought gmres would do the same since I'm solving the subblocks "exactly".
Simone
From: Justin Chang
Sent: Monday, March 18, 2019 3:38:34 PM
To: Rossi, Simone
cs.anl.gov
Subject: Re: [petsc-users] BJACOBI with FIELDSPLIT
Use -ksp_type fgmres if your inner ksp solvers are gmres. Maybe that will help?
On Mon, Mar 18, 2019 at 1:33 PM Rossi, Simone via petsc-users
mailto:petsc-users@mcs.anl.gov>> wrote:
Thanks Barry.
Let me know if you can s
; linear system matrix = precond matrix:
>
> Mat Object: (fieldsplit_1_) 1 MPI processes
>
> type: seqaij
>
> rows=35937, cols=35937
>
> total: nonzeros=912673, allocated nonzeros=912673
>
> total number of mallocs us
, Simone
Cc: petsc-users@mcs.anl.gov
Subject: Re: [petsc-users] BJACOBI with FIELDSPLIT
Simone,
This is indeed surprising, given the block structure of the matrix and the
exact block solves we'd expect the solver to converge after the application of
the preconditioner. Please send the output
Simone,
This is indeed surprising, given the block structure of the matrix and the
exact block solves we'd expect the solver to converge after the application of
the preconditioner. Please send the output of -ksp_view
Barry
Also if you are willing to share your test code we can try
Dear all,
I'm debugging my application in which I'm trying to use the FIELDSPLIT
preconditioner for solving a 2x2 block matrix.
Currently I'm testing the preconditioner on a decoupled system where I solve
two identical and independent Poisson problems. Using the default fieldsplit
type
