>
> Perhaps you also want SNESSetLagPreconditioner
>
> - lag - -1 indicates NEVER rebuild, 1 means rebuild every time the Jacobian
> is computed within a single nonlinear solve, 2 means every second time
> the Jacobian is built etc. -2 indicates rebuild preconditioner at
> next chance
You mean -snes_type ksponly ?
Anyways the manual page says:
SNESKSPONLY - Nonlinear solver that only performs one Newton step and does
not compute any norms.
The main purpose of this solver is to solve linear problems using the
SNES interface, without
any additional overhe
On Sun, Sep 1, 2013 at 5:54 PM, Mark F. Adams wrote:
> I have a SNES solver that runs with a linear operator at times. I use
> -ksp_ksponly. The KSPSetOperator seems to get called every solve because
> the PC setup code gets called every solve. Should this be happening?
Is there a problem wi
-snes_type ksponly would be the appropriate option. KSPOnly does *only*
one iteration consisting of a single KSP solve (
http://www.mcs.anl.gov/petsc/petsc-current/src/snes/impls/ksponly/ksponly.c.html
).
Are you seeing different behavior than this?
- Peter
I have a SNES solver that runs with a linear operator at times. I use
-ksp_ksponly. The KSPSetOperator seems to get called every solve because the
PC setup code gets called every solve. Should this be happening?
Mark
