Li,
It is possible, but as Hong said probably never appropriate. Especially if
KSP has iterated for 10,000 iterations. If you want SNES to "try" the direction
given by a failed solve you should use a much smaller maximum number of
iterations for KSP.
Anways, to do what you desire
#
Yes it worked. I get exactly the same vector as reported in the output file
I will test it now with my problem and if I see anything strange I will let you
know.
Thank you so much
Eugenio
Eugenio Aulisa
Department of Mathematics and Statistics,
Texas Tech University
Lubbock TX, 79409-1042
r
Hi all,
Just retouching in case my mail was lost, does my problem make enough
sense? I could try to be clearer if you like. I tried using TSGetStages()
in the middle of the RHS function but that didn't work. Maybe we can find a
different approach for this ?
Thanks,
On Tue, Sep 24, 2019 at 12:58
With VecGhostUpdateBegin(v, INSERT_VALUES, SCATTER_REVERSE), the owner will get
updated by ghost values. So in your case 1, proc0 gets either value1 or value2
from proc1/2; in case 2; proc0 gets either value0 or value2 from proc1/2.
In short, you could not achieve your goal with INSERT_VALUES. T
Li :
You can use '-ksp_max_it 2' to change maximum iteration count. However, it
does not make sense to continue after it fails at 1 iterations. You should
figure out why linear solver diverges. Run your code with '-ksp_monitor' or
'-ksp_monitor_true_residual'.
Hong
Dear developer,
I am
Dear developer,
I am using SNES for solving a nonlinear system. For some cases, SNES
diverged -3 with "DIVERGED_LINEAR_SOLVE" when the linear solver reached its
maximum iteration count (i.e -ksp_max_it 1).
Is that possible to let SNES continue even though the linear solver reaches
the maximum
On Wed, Sep 25, 2019 at 9:11 AM Aulisa, Eugenio via petsc-users
mailto:petsc-users@mcs.anl.gov>> wrote:
Hi,
I have a vector with ghost nodes where each process may or may not change the
value of a specific ghost node (using INSERT_VALUES).
At the end I would like for each process, that see
