[petsc-users] ksp_monitor_true_residual_norm
Randall Mackie
rlmackie862 at gmail.com
Thu Apr 19 13:53:00 CDT 2012
Jed,
It is working now - I think my first try I didn't apply the patch correctly.
Thanks for the help.
Randy
On Apr 19, 2012, at 10:40 AM, Jed Brown wrote:
> It looks like this null object check was missing from the Fortran bindings. Can you try with this patch included?
>
> http://petsc.cs.iit.edu/petsc/petsc-dev/rev/05b5b9325f55
>
> On Thu, Apr 19, 2012 at 10:12, Randall Mackie <rlmackie862 at gmail.com> wrote:
> Hi Matt and Barry,
>
> I tried this again, but this time I used a c subroutine like Barry suggested, which is this:
>
> #include "petsc.h"
>
> PetscErrorCode shellkspmonitor_(KSP ksp,PetscInt n,PetscReal rnorm,void *dummy)
> {
> PetscErrorCode ierr=0;
> if (n % 10) {
> ierr = KSPMonitorTrueResidualNorm(ksp,n,rnorm,dummy);CHKERRQ(ierr);
> }
>
> return ierr;
> }
>
>
> In my Fortran code, I declared shellkspmonitor as external, then I called KSPSetMonitor as follows:
>
> call KSPMonitorSet(ksp,shellkspmonitor,PETSC_NULL_OBJECT, PETSC_NULL_FUNCTION, ierr)
>
>
> But I am still getting the same error as before:
>
> [0]PETSC ERROR: [1]PETSC ERROR: [2]PETSC ERROR: [3]PETSC ERROR: --------------------- Error Message ------------------------------------
> --------------------- Error Message ------------------------------------
> [3]PETSC ERROR: [2]PETSC ERROR: Invalid argument!
> Invalid argument!
> [3]PETSC ERROR: Wrong type of object: Parameter # 1!
> [3]PETSC ERROR: [2]PETSC ERROR: ------------------------------------------------------------------------
> [3]PETSC ERROR: Petsc Release Version 3.2.0, Patch 5, Sat Oct 29 13:45:54 CDT 2011
> [3]PETSC ERROR: --------------------- Error Message ------------------------------------
> [0]PETSC ERROR: Invalid argument!
> [0]PETSC ERROR: Wrong type of object: Parameter # 1!
> [0]PETSC ERROR: ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 5, Sat Oct 29 13:45:54 CDT 2011
> [0]PETSC ERROR: See docs/changes/index.html for recent updates.
> [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
> [0]PETSC ERROR: See docs/index.html for manual pages.
> [0]PETSC ERROR: ------------------------------------------------------------------------
> [0]PETSC ERROR: PetscViewerASCIIAddTab() line 277 in src/sys/viewer/impls/ascii/filev.c
> [0]PETSC ERROR: KSPMonitorTrueResidualNorm() line 233 in src/ksp/ksp/interface/iterativ.c
> [0]PETSC ERROR: shellkspmonitor_() line 7 in custom_monitor.c
> [3]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
> [3]PETSC ERROR: See docs/index.html for manual pages.
>
> So, there is either a problem in one of the PETSc routines, or the call from Fortran to KSPMonitorSet
> is wrong, although I have copied the calling sequence from the example in /src/ksp/ksp/examples/tutorials/ex2f.F
>
> In fact, you can reproduce this error using ex2f.F, simply swapping in the custom monitor above for
> the MyKSPMonitor of that example. I can send you the modified code and c subroutine to test if you want.
>
> Thanks, Randy
>
>
> On Tue, Apr 17, 2012 at 10:39 AM, Matthew Knepley <knepley at gmail.com> wrote:
> On Tue, Apr 17, 2012 at 1:27 PM, Randall Mackie <rlmackie862 at gmail.com> wrote:
> Hi Barry,
>
> I've tried implementing this in Fortran, following ex2f.F in /src/ksp/ksp/examples/tutorials, but
> it is bombing out with the following message:
>
> ---------------------- Error Message ------------------------------------
> [0]PETSC ERROR: Invalid argument!
> [0]PETSC ERROR: Wrong type of object: Parameter # 1!
> [0]PETSC ERROR: ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 5, Sat Oct 29 13:45:54 CDT 2011
> -------------------- Error Message ------------------------------------
> [0]PETSC ERROR: Invalid argument!
> [0]PETSC ERROR: Wrong type of object: Parameter # 1!
> [0]PETSC ERROR: ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 5, Sat Oct 29 13:45:54 CDT 2011
>
>
> [1]PETSC ERROR: PetscViewerASCIIAddTab() line 277 in src/sys/viewer/impls/ascii/filev.c
> [1]PETSC ERROR: KSPMonitorTrueResidualNorm() line 233 in src/ksp/ksp/interface/iterativ.c
> [1]PETSC ERROR: ourmonitor() line 103 in src/ksp/ksp/interface/ftn-custom/zitfuncf.c
> [1]PETSC ERROR: KSPMonitor() line 1429 in src/ksp/ksp/interface/itfunc.c
> [1]PETSC ERROR: KSPSolve_CG() line 255 in src/ksp/ksp/impls/cg/cg.c
> [1]PETSC ERROR: KSPSolve() line 423 in src/ksp/ksp/interface/itfunc.c
>
>
> I am running PETSC 3.2-p5.
>
> I have set my monitor routine as follows:
>
> subroutine ShellKSPMonitor(ksp, n, rnorm, dummy, ierr)
>
> implicit none
>
> #include "finclude/petsc.h"
>
> KSP :: ksp
> PetscErrorCode :: ierr
> PetscInt :: n, dummy
> PetscReal :: rnorm
>
> if (n == 200) then
> call KSPMonitorTrueResidualNorm(ksp,n,rnorm,dummy,ierr)
>
> I think it should work if dummy is 0, but we should really do NULL conversion
> here and you should pass PETSC_NULL.
>
> Matt
>
> end if
>
> return
> end subroutine ShellKSPMonitor
>
> And then in the main program I call:
>
> call KSPMonitorSet(ksp,ShellKSPMonitor,PETSC_NULL_OBJECT, PETSC_NULL_FUNCTION, ierr)
>
> As I have followed the example in the PETSc documentation, I am unsure where I have made a mistake.
>
> Thanks,
>
> Randy M
>
>
> On Fri, Apr 13, 2012 at 5:01 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
> Write a one line monitor that calls the true residual monitor when desired:
>
> PetscErrorCode myKSPMonitorTrueResidualNorm(KSP ksp,PetscInt n,PetscReal rnorm,void *dummy)
> {
> if (n % 10) {
> ierr = KSPMonitorTrueResidualNorm(ksp,n,rnorm,dummy);CHKERRQ(ierr);
> }
> }
>
> then call this on the KPS
>
> ierr = KSPMonitorSet(ksp,myKSPMonitorTrueResidualNorm,PETSC_VIEWER_STDOUT,0);CHKERRQ(ierr);
>
>
> On Apr 13, 2012, at 6:52 PM, Randall Mackie wrote:
>
> > In using ksp_monitor_true_residual_norm, is it possible to change how often this information is printed out?
> > That is, instead of every iteration, say I only want to see it every 10 or 20 iterations. Is there an easy way
> > to do this, other than creating my own monitor and doing it myself?
> >
> > Thanks, Randy M.
>
>
>
>
>
> --
> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
> -- Norbert Wiener
>
>
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