Dear Petsc-Team
I am using KSPBuildResidual() to calculate true residual and use it as
convergence criteria. It means the program will call KSPBuildResidual
every iteration. I choose GMRES as a solver but I read in manual, it
is written that this command is expensive for GMRES and some
If you want to use the true residual norm then use GMRES with
right preconditioning. KSPSetPreconditionerSide()
Barry
On Dec 23, 2009, at 5:01 AM, jarunan at ascomp.ch wrote:
Dear Petsc-Team
I am using KSPBuildResidual() to calculate true residual and use it
as convergence
Thanks for the suggestion.
Can I change residual norm from Norm 2 to infinity norm?
Regards,
Jarunan
Quoting Barry Smith bsmith at mcs.anl.gov:
If you want to use the true residual norm then use GMRES with right
preconditioning. KSPSetPreconditionerSide()
Barry
On Dec 23,
Hi,
I installed all the packages in a mac machine. When I run mpirun -np 4
~/bin/cats3d.1 -mat_view_draw -draw_pause -1 under X11, I get some errors:
--
[0]PETSC ERROR: - Error Message
[0]PETSC ERROR: Argument out of range!
[0]PETSC
well if you need -mat_view_draw - then suggest editing
src/mat/impls/aij/mpi/mpiaij.c and increate this cut-off size.
[there is now a command-line option to over-ride this limit in petsc-dev]
For binary viewer - check mat/examples/tests/ex31.c
Satish
On Wed, 23 Dec 2009, hxie at umn.edu wrote:
Hi,
Thanks. When I try to run with the option -ksp_xmonitor, no window pops
up. Do I need to reinstall the petsc with the option --with-x=1? BTW, if I
want to use some external packages, do I have to reinstall the petsc?
Happy holiday,
Hui
-
well if you need -mat_view_draw -
On Wed, 23 Dec 2009, hxie at umn.edu wrote:
Hi,
Thanks. When I try to run with the option -ksp_xmonitor, no window pops up.
Do I need to reinstall the petsc with the option --with-x=1?
use -ksp_monitor_draw
BTW, if I want to use some external packages, do I have to reinstall
the petsc?
Hi,
I put the following in my code:
--
PetscViewer viewer
...
call
PetscViewerBinaryOpen(PETSC_COMM_WORLD,matrix.dat,FILE_MODE_WRITE,viewer,pterr);
call MatView(ptMat,viewer,pterr)
call PetscViewerDestroy(viewer,pterr)
--
Still no window
Binary viewer is to dump the matrix into a file - not a mat_view_draw
wrt -mat_view_draw - I've already indicated what to do..
satish
On Wed, 23 Dec 2009, hxie at umn.edu wrote:
Hi,
I put the following in my code:
--
PetscViewer viewer ...
call
