Satish, Thanks for the files! I've copied them to the correct location in my petsc-3.5.3 dir and rebuild the whole thing from scratch but I still get the same memory corruption for the example below...
Chris ________________________________________ From: Satish Balay <ba...@mcs.anl.gov> Sent: Friday, April 24, 2015 10:54 PM To: Klaij, Christiaan Cc: petsc-users@mcs.anl.gov Subject: Re: [petsc-users] PETSC_NULL_OBJECT gets corrupt after call to MatNestGetISs in fortran Sorry for dropping the ball on this issue. I pushed the following fix to maint branch. https://bitbucket.org/petsc/petsc/commits/3a4d7b9a6c83003720b45dc0635fc32ea52a4309 To use this change with petsc-3.5.3 - you can drop in the attached replacement files at: src/mat/impls/nest/ftn-custom/zmatnestf.c src/mat/impls/nest/ftn-auto/matnestf.c Satish On Fri, 24 Apr 2015, Klaij, Christiaan wrote: > Barry, Satish > > Any news on this issue? > > Chris > > > On Feb 12, 2015, at 07:13:08 CST, Smith, Barry <bsm...@mcs.anl.gov> wrote: > > > > Thanks for reporting this. Currently the Fortran stub for this function > > is generated automatically which means it does not have the logic for > > handling a PETSC_NULL_OBJECT argument. > > > > Satish, could you please see if you can add a custom fortran stub for > > this function in maint? > > > > Thanks > > > > Barry > > > > > On Feb 12, 2015, at 3:02 AM, Klaij, Christiaan <C.Klaij at marin.nl> > > > wrote: > > > > > > Using petsc-3.5.3, I noticed that PETSC_NULL_OBJECT gets corrupt after > > > calling MatNestGetISs in fortran. Here's a small example: > > > > > > $ cat fieldsplittry2.F90 > > > program fieldsplittry2 > > > > > > use petscksp > > > implicit none > > > #include <finclude/petsckspdef.h> > > > > > > PetscErrorCode :: ierr > > > PetscInt :: size,i,j,start,end,n=4,numsplit=1 > > > PetscScalar :: zero=0.0,one=1.0 > > > Vec :: diag3,x,b > > > Mat :: A,subA(4),myS > > > PC :: pc,subpc(2) > > > KSP :: ksp,subksp(2) > > > IS :: isg(2) > > > > > > call PetscInitialize(PETSC_NULL_CHARACTER,ierr); CHKERRQ(ierr) > > > call MPI_Comm_size(PETSC_COMM_WORLD,size,ierr); CHKERRQ(ierr); > > > > > > ! vectors > > > call VecCreateMPI(MPI_COMM_WORLD,3*n,PETSC_DECIDE,diag3,ierr); > > > CHKERRQ(ierr) > > > call VecSet(diag3,one,ierr); CHKERRQ(ierr) > > > > > > call VecCreateMPI(MPI_COMM_WORLD,4*n,PETSC_DECIDE,x,ierr); CHKERRQ(ierr) > > > call VecSet(x,zero,ierr); CHKERRQ(ierr) > > > > > > call VecDuplicate(x,b,ierr); CHKERRQ(ierr) > > > call VecSet(b,one,ierr); CHKERRQ(ierr) > > > > > > ! matrix a00 > > > call > > > MatCreateAIJ(MPI_COMM_WORLD,3*n,3*n,PETSC_DECIDE,PETSC_DECIDE,1,PETSC_NULL_INTEGER,0,PETSC_NULL_INTEGER,subA(1),ierr);CHKERRQ(ierr) > > > call MatDiagonalSet(subA(1),diag3,INSERT_VALUES,ierr);CHKERRQ(ierr) > > > call MatAssemblyBegin(subA(1),MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > call MatAssemblyEnd(subA(1),MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > > > > ! matrix a01 > > > call > > > MatCreateAIJ(MPI_COMM_WORLD,3*n,n,PETSC_DECIDE,PETSC_DECIDE,1,PETSC_NULL_INTEGER,1,PETSC_NULL_INTEGER,subA(2),ierr);CHKERRQ(ierr) > > > call MatGetOwnershipRange(subA(2),start,end,ierr);CHKERRQ(ierr); > > > do i=start,end-1 > > > j=mod(i,size*n) > > > call MatSetValue(subA(2),i,j,one,INSERT_VALUES,ierr);CHKERRQ(ierr) > > > end do > > > call MatAssemblyBegin(subA(2),MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > call MatAssemblyEnd(subA(2),MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > > > > ! matrix a10 > > > call MatTranspose(subA(2),MAT_INITIAL_MATRIX,subA(3),ierr);CHKERRQ(ierr) > > > > > > ! matrix a11 (empty) > > > call > > > MatCreateAIJ(MPI_COMM_WORLD,n,n,PETSC_DECIDE,PETSC_DECIDE,0,PETSC_NULL_INTEGER,0,PETSC_NULL_INTEGER,subA(4),ierr);CHKERRQ(ierr) > > > call MatAssemblyBegin(subA(4),MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > call MatAssemblyEnd(subA(4),MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > > > > ! nested mat [a00,a01;a10,a11] > > > call > > > MatCreateNest(MPI_COMM_WORLD,2,PETSC_NULL_OBJECT,2,PETSC_NULL_OBJECT,subA,A,ierr);CHKERRQ(ierr) > > > call MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > call MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY,ierr);CHKERRQ(ierr) > > > print *, PETSC_NULL_OBJECT > > > call MatNestGetISs(A,isg,PETSC_NULL_OBJECT,ierr);CHKERRQ(ierr); > > > print *, PETSC_NULL_OBJECT > > > > > > call PetscFinalize(ierr) > > > > > > end program fieldsplittry2 > > > $ ./fieldsplittry2 > > > 0 > > > 39367824 > > > $ > > > > > > > > > dr. ir. Christiaan Klaij > > > CFD Researcher > > > Research & Development > > > E mailto:C.Klaij at marin.nl > > > T +31 317 49 33 44 > > > > > > > > > MARIN > > > 2, Haagsteeg, P.O. Box 28, 6700 AA Wageningen, The Netherlands > > > T +31 317 49 39 11, F +31 317 49 32 45, I www.marin.nl > > > > > > dr. ir. Christiaan Klaij > CFD Researcher > Research & Development > E mailto:c.kl...@marin.nl > T +31 317 49 33 44 > > > MARIN > 2, Haagsteeg, P.O. Box 28, 6700 AA Wageningen, The Netherlands > T +31 317 49 39 11, F +31 317 49 32 45, I www.marin.nl > >