Hi,
I need to investigate the performance of FETI-DP on a heteregenous problem
with a proposed preconditioner/scaling and different parameters. I do not
want to reinvent the known. I need to investigate the outcomes of my
research on top of FETI-DP.
I have seen several papers in literature
On Wed, Sep 3, 2014 at 3:10 AM, Alp Kalpalp alpkalp...@gmail.com wrote:
Hi,
I need to investigate the performance of FETI-DP on a heteregenous problem
with a proposed preconditioner/scaling and different parameters. I do not
want to reinvent the known. I need to investigate the outcomes of
You could perhaps have a look at the PCBDDC :
http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCBDDC.html
contributed by Stefano Zampini.
Best,
Nicolas
2014-09-03 13:09 GMT+02:00 Matthew Knepley knep...@gmail.com:
On Wed, Sep 3, 2014 at 3:10 AM, Alp Kalpalp
Matt,
Thanks for the fix. If I understand correctly, in an existing
install of petsc-3.5.1, I would only need to replace the
file finclude/petscpc.h by the new file for the fix to
work? (instead of downloading dev, configuring, installing on
various machines).
Chris
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On Wed, Sep 3, 2014 at 7:00 AM, Klaij, Christiaan c.kl...@marin.nl wrote:
Matt,
Thanks for the fix. If I understand correctly, in an existing
install of petsc-3.5.1, I would only need to replace the
file finclude/petscpc.h by the new file for the fix to
work? (instead of downloading dev,
Dear Matt,
While searcing inside of the petsc bundle, I have seen
PCBDDCMatFETIDPGetRHS
PCBDDCMatFETIDPGetSolution
PCBDDCCreateFETIDPOperators
also there is an example in
petsc-3.5.1\src\ksp\ksp\examples\tutorials\ex59.c
however I could not see it on webbrowser interface. Is this an
On Wed, Sep 3, 2014 at 8:51 AM, Alp Kalpalp alpkalp...@gmail.com wrote:
Dear Matt,
While searcing inside of the petsc bundle, I have seen
PCBDDCMatFETIDPGetRHS
PCBDDCMatFETIDPGetSolution
PCBDDCCreateFETIDPOperators
also there is an example in
Matthew Knepley knep...@gmail.com writes:
1- Is it possible to complete a FETI-DP solution with the provided
functions in current PetSc release?
There is no FETI-DP in PETSc.
Wrong. There is PCBDDC, which has the same eigenvalues as FETI-DP. You
can enable it by configuring --with-pcbddc.
Matt,
Thanks, after applying the fix to my petsc-3.5.1 install, the
small Fortran program works as expected.
Now, I would like to change the fortran strategy to the
option 3) Using Fortran modules. So, in the small fortran
program I replace these seven lines
#include finclude/petscsys.h
On Wed, Sep 3, 2014 at 9:23 AM, Klaij, Christiaan c.kl...@marin.nl wrote:
Matt,
Thanks, after applying the fix to my petsc-3.5.1 install, the
small Fortran program works as expected.
Now, I would like to change the fortran strategy to the
option 3) Using Fortran modules. So, in the small
I'm sorry, how do I do that?
Chris
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This e-mail may be confidential,
On Wed, Sep 3, 2014 at 9:43 AM, Klaij, Christiaan c.kl...@marin.nl wrote:
I'm sorry, how do I do that?
print it
Matt
Chris
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print *, PC_FIELDSPLIT_SCHUR_PRE_USER
gives: 2.
(changing to *_SELFP gives: This name does not have a type, and must have an
explicit type. [PC_FIELDSPLIT_SCHUR_PRE_SELFP])
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On Wed, Sep 3, 2014 at 9:46 AM, Klaij, Christiaan c.kl...@marin.nl wrote:
print *, PC_FIELDSPLIT_SCHUR_PRE_USER
gives: 2.
(changing to *_SELFP gives: This name does not have a type, and must have
an explicit type. [PC_FIELDSPLIT_SCHUR_PRE_SELFP])
I have
FETIDP is in PETSc as a byproduct of the BDDC preconditioner (one is the dual
of the other) and it does not have its own classes so far.
That said, you can experiment with FETI-DP only after having setup a BDDC
preconditioner with the options and customization you prefer.
Use
Hi all,
I'm simulating a problem with small fluxes, using the asm preconditioner and lu
as the sub preconditioner. The simulation runs fine using 2 cores, but when I
use more the fluxes disappear and the desired effect goes with them.
Does anyone have an idea of a suitable tolerance or
Start by running with -snes_converged_reason -snes_monitor
-ksp_converged_reason -ksp_monitor_true_residual -snes_linesearch_monitor
on two and then three cores.
By default, “not converging” of an iterative solver does not generate an
error so the most likely cause is that the iterative
Thanks Barry, I attach the terminal outputs. From my reading, it seems like
everything converged alright, no? Usually I get an error message when the
linear or snes solver doesn't converge.
By the way, I don't think it should matter but for your reference I am doing an
operator split method in
On Wed, Sep 3, 2014 at 2:05 PM, Welland, Michael J. mwell...@anl.gov
wrote:
Thanks Barry, I attach the terminal outputs. From my reading, it seems
like everything converged alright, no? Usually I get an error message when
the linear or snes solver doesn't converge.
By the way, I don't
Force really tight convergence on the nonlinear solver -snes_rtol 1.e-12
Note also that initial function norm
0 SNES Function norm 2.418625311837e+01
0 SNES Function norm 3.156023513435e+04
is very different in the two cases. This means either you are solving a
different nonlinear
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