On Sat, Jun 16, 2012 at 12:03 AM, Daniel Lowell <redratio1 at gmail.com> wrote:
> Hey Satish, > > So I'm having an issue with this function: > > *#define PetscObjectComposedDataGetReal > <http://www.mcs.anl.gov/petsc/petsc-current/include/petsc-private/docs/manualpages/Sys/PetscObjectComposedDataGetReal.html#PetscObjectComposedDataGetReal>(obj,id,data,flag) > \**((((obj)->realcomposedstate && > ((obj)->realcomposedstate[id] == (obj)->state))? \**(data = > (obj)->realcomposeddata[id],flag = PETSC_TRUE > <http://www.mcs.anl.gov/petsc/petsc-current/include/petsc-private/docs/manualpages/Sys/PETSC_TRUE.html#PETSC_TRUE>) > : (flag = PETSC_FALSE > <http://www.mcs.anl.gov/petsc/petsc-current/include/petsc-private/docs/manualpages/Sys/PETSC_FALSE.html#PETSC_FALSE>)),0)* > > > Called from VecNorm which is called from SNESLineSearchApply_BT > > I have two examples running one is the vanilla ex14 using my GPU vector > and matrix type. The other example is a variant of ex14test where I am > implementing GPU formfunction and formjacobian. > ex14 vanilla runs through correctly, however ex14test diverges in the > logic within VecNorm, specifically line 164: > /* > * Cached data? > */ > if (type!=NORM_1_AND_2) { > ierr = PetscObjectComposedDataGetReal > ((PetscObject)x,NormIds[type],*val,flg);CHKERRQ(ierr); > if (flg) PetscFunctionReturn(0); > } > > The ex14 detects there is a "real" part, however the ex14test does not and > VecNorm returns. > > "val" in VecNorm is PetscReal gnorm = fnorm defined in > SNESLineSearchApply_BT. > For ex14: val[0]=3.44e-317, val[1]: 0.580 > For ex14test: val[0]=3.44e-317, val[1]: 0.029 > > > This difference makes SNESLineSearchApply_BT branch into different > execution paths. > > I'm not sure where the issue could have come from. Any ideas? > If you change values in a Vec, you must increment the internal state, since we cache norms. The internal functions for array getting do this automatically, so I am not sure why this is messing up. Did you bypass them? Matt > > -- > Daniel Lowell > > -- 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20120616/ed4a45e4/attachment-0001.html>
