Ok in master using src/snes/examples/tutorials/ex56.c I get
$ petscmpiexec -n 2 ./ex56 -ne 2 -alpha 1.e-3 -two_solves true -dm_refine 1
-petscspace_poly_tensor -petscspace_order 1 -ksp_type cg -ksp_monitor_short
-ksp_rtol 1.e-8 -pc_type gamg -pc_gamg_type agg -pc_gamg_agg_nsmooths 1
-pc_gamg_coarse_eq_limit 100 -pc_gamg_reuse_interpolation true
-pc_gamg_square_graph 1 -pc_gamg_threshold 0.0 -ksp_converged_reason
-use_mat_nearnullspace true -mg_levels_ksp_max_it 2 -mg_levels_ksp_type
chebyshev -mg_levels_esteig_ksp_type cg -mg_levels_esteig_ksp_max_it 10
-mg_levels_ksp_chebyshev_esteig 0,0.05,0,1.05 -mg_levels_pc_type sor
-mat_block_size 3 -petscpartitioner_type parmetis -pc_gamg_use_agg_gasm
-mg_levels_pc_type gasm -ksp_view
[0]main 300/100 eqs in vector
[0]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------
[0]PETSC ERROR: Nonconforming object sizes
[0]PETSC ERROR: Vector wrong size 120 for scatter 1 (scatter forward and vector
from != ctx from size)
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for
trouble shooting.
[0]PETSC ERROR: Petsc Development GIT revision: v3.7.2-644-gee393a6 GIT Date:
2016-06-24 09:01:50 -0500
[0]PETSC ERROR: ./ex56 on a arch-basic named Barrys-MacBook-Pro.local by
barrysmith Fri Jun 24 11:30:00 2016
[0]PETSC ERROR: Configure options --with-mpi-dir=/Users/barrysmith/libraries
PETSC_ARCH=arch-basic --download-metis --download-parmetis
[0]PETSC ERROR: #1 VecScatterBegin() line 1773 in
/Users/barrysmith/Src/petsc/src/vec/vec/utils/vscat.c
[0]PETSC ERROR: #2 PCApply_GASM() line 686 in
/Users/barrysmith/Src/petsc/src/ksp/pc/impls/gasm/gasm.c
[0]PETSC ERROR: #3 PCApply() line 482 in
/Users/barrysmith/Src/petsc/src/ksp/pc/interface/precon.c
[0]PETSC ERROR: #4 KSP_PCApply() line 244 in
/Users/barrysmith/Src/petsc/include/petsc/private/kspimpl.h
[0]PETSC ERROR: #5 KSPSolve_CG() line 137 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/impls/cg/cg.c
[0]PETSC ERROR: #6 KSPSolve() line 656 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/interface/itfunc.c
[0]PETSC ERROR: #7 KSPSolve_Chebyshev() line 390 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/impls/cheby/cheby.c
[0]PETSC ERROR: #8 KSPSolve() line 656 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/interface/itfunc.c
[0]PETSC ERROR: #9 PCMGMCycle_Private() line 21 in
/Users/barrysmith/Src/petsc/src/ksp/pc/impls/mg/mg.c
[0]PETSC ERROR: [1]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------
[1]PETSC ERROR: Nonconforming object sizes
[1]PETSC ERROR: Vector wrong size 180 for scatter 300 (scatter forward and
vector from != ctx from size)
[1]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for
trouble shooting.
[1]PETSC ERROR: Petsc Development GIT revision: v3.7.2-644-gee393a6 GIT Date:
2016-06-24 09:01:50 -0500
[1]PETSC ERROR: ./ex56 on a arch-basic named Barrys-MacBook-Pro.local by
barrysmith Fri Jun 24 11:30:00 2016
[1]PETSC ERROR: #10 PCApply_MG() line 343 in
/Users/barrysmith/Src/petsc/src/ksp/pc/impls/mg/mg.c
[0]PETSC ERROR: #11 PCApply() line 482 in
/Users/barrysmith/Src/petsc/src/ksp/pc/interface/precon.c
[0]PETSC ERROR: #12 KSP_PCApply() line 244 in
/Users/barrysmith/Src/petsc/include/petsc/private/kspimpl.h
[0]PETSC ERROR: #13 KSPSolve_CG() line 137 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/impls/cg/cg.c
Configure options --with-mpi-dir=/Users/barrysmith/libraries
PETSC_ARCH=arch-basic --download-metis --download-parmetis
[1]PETSC ERROR: #1 VecScatterBegin() line 1773 in
/Users/barrysmith/Src/petsc/src/vec/vec/utils/vscat.c
[1]PETSC ERROR: #2 PCApply_GASM() line 686 in
/Users/barrysmith/Src/petsc/src/ksp/pc/impls/gasm/gasm.c
[1]PETSC ERROR: #3 PCApply() line 482 in
/Users/barrysmith/Src/petsc/src/ksp/pc/interface/precon.c
[0]PETSC ERROR: #14 KSPSolve() line 656 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/interface/itfunc.c
[0]PETSC ERROR: #15 main() line 408 in
/Users/barrysmith/Src/petsc/src/snes/examples/tutorials/ex56.c
[0]PETSC ERROR: PETSc Option Table entries:
[0]PETSC ERROR: -alpha 1.e-3
[0]PETSC ERROR: -dm_refine 1
[0]PETSC ERROR: -ksp_converged_reason
[0]PETSC ERROR: -ksp_monitor_short
[0]PETSC ERROR: -ksp_rtol 1.e-8
[0]PETSC ERROR: -ksp_type cg
[0]PETSC ERROR: [1]PETSC ERROR: #4 KSP_PCApply() line 244 in
/Users/barrysmith/Src/petsc/include/petsc/private/kspimpl.h
[1]PETSC ERROR: #5 KSPSolve_CG() line 137 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/impls/cg/cg.c
[1]PETSC ERROR: #6 KSPSolve() line 656 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/interface/itfunc.c
[1]PETSC ERROR: #7 KSPSolve_Chebyshev() line 390 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/impls/cheby/cheby.c
[1]PETSC ERROR: #8 KSPSolve() line 656 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/interface/itfunc.c
-ksp_view
[0]PETSC ERROR: -malloc_test
[0]PETSC ERROR: -mat_block_size 3
[0]PETSC ERROR: -mg_levels_esteig_ksp_max_it 10
[0]PETSC ERROR: -mg_levels_esteig_ksp_type cg
[0]PETSC ERROR: -mg_levels_ksp_chebyshev_esteig 0,0.05,0,1.05
[0]PETSC ERROR: -mg_levels_ksp_max_it 2
[1]PETSC ERROR: #9 PCMGMCycle_Private() line 21 in
/Users/barrysmith/Src/petsc/src/ksp/pc/impls/mg/mg.c
[1]PETSC ERROR: #10 PCApply_MG() line 343 in
/Users/barrysmith/Src/petsc/src/ksp/pc/impls/mg/mg.c
[0]PETSC ERROR: -mg_levels_ksp_type chebyshev
[0]PETSC ERROR: -mg_levels_pc_type gasm
[0]PETSC ERROR: -ne 2
[0]PETSC ERROR: -pc_gamg_agg_nsmooths 1
[0]PETSC ERROR: -pc_gamg_coarse_eq_limit 100
[0]PETSC ERROR: [1]PETSC ERROR: #11 PCApply() line 482 in
/Users/barrysmith/Src/petsc/src/ksp/pc/interface/precon.c
[1]PETSC ERROR: #12 KSP_PCApply() line 244 in
/Users/barrysmith/Src/petsc/include/petsc/private/kspimpl.h
[1]PETSC ERROR: #13 KSPSolve_CG() line 137 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/impls/cg/cg.c
[1]PETSC ERROR: #14 KSPSolve() line 656 in
/Users/barrysmith/Src/petsc/src/ksp/ksp/interface/itfunc.c
-pc_gamg_reuse_interpolation true
[0]PETSC ERROR: -pc_gamg_square_graph 1
[0]PETSC ERROR: -pc_gamg_threshold 0.0
[1]PETSC ERROR: #15 main() line 408 in
/Users/barrysmith/Src/petsc/src/snes/examples/tutorials/ex56.c
[1]PETSC ERROR: PETSc Option Table entries:
[1]PETSC ERROR: [0]PETSC ERROR: -pc_gamg_type agg
[0]PETSC ERROR: -pc_gamg_use_agg_gasm
[0]PETSC ERROR: -pc_type gamg
[0]PETSC ERROR: -petscpartitioner_type parmetis
[0]PETSC ERROR: -petscspace_order 1
[0]PETSC ERROR: -petscspace_poly_tensor
-alpha 1.e-3
[1]PETSC ERROR: -dm_refine 1
[1]PETSC ERROR: -ksp_converged_reason
[1]PETSC ERROR: -ksp_monitor_short
[0]PETSC ERROR: -two_solves true
[0]PETSC ERROR: -use_mat_nearnullspace true
[0]PETSC ERROR: ----------------End of Error Message -------send entire error
message to [email protected]
[1]PETSC ERROR: -ksp_rtol 1.e-8
[1]PETSC ERROR: -ksp_type cg
[1]PETSC ERROR: -ksp_view
[1]PETSC ERROR: -malloc_test
[1]PETSC ERROR: -mat_block_size 3
[1]PETSC ERROR: -mg_levels_esteig_ksp_max_it 10
[1]PETSC ERROR: -mg_levels_esteig_ksp_type cg
[1]PETSC ERROR: -mg_levels_ksp_chebyshev_esteig 0,0.05,0,1.05
[1]PETSC ERROR: -mg_levels_ksp_max_it 2
[1]PETSC ERROR: -mg_levels_ksp_type chebyshev
[1]PETSC ERROR: application called MPI_Abort(MPI_COMM_WORLD, 60) - process 0
-mg_levels_pc_type gasm
[1]PETSC ERROR: -ne 2
[1]PETSC ERROR: -pc_gamg_agg_nsmooths 1
[1]PETSC ERROR: -pc_gamg_coarse_eq_limit 100
[1]PETSC ERROR: -pc_gamg_reuse_interpolation true
[1]PETSC ERROR: -pc_gamg_square_graph 1
[1]PETSC ERROR: -pc_gamg_threshold 0.0
[1]PETSC ERROR: -pc_gamg_type agg
[1]PETSC ERROR: -pc_gamg_use_agg_gasm
[1]PETSC ERROR: -pc_type gamg
[1]PETSC ERROR: -petscpartitioner_type parmetis
[1]PETSC ERROR: -petscspace_order 1
[1]PETSC ERROR: -petscspace_poly_tensor
[1]PETSC ERROR: -two_solves true
[1]PETSC ERROR: -use_mat_nearnullspace true
[1]PETSC ERROR: ----------------End of Error Message -------send entire error
message to [email protected]
application called MPI_Abort(MPI_COMM_WORLD, 60) - process 1
I'll have to start poking around to see what is going on. Could be do to
changes in GAMG or in GASM. Bisect here I come.
Barry
> On Jun 24, 2016, at 9:52 AM, Mark Adams <[email protected]> wrote:
>
> OK, but how should I proceed?
>
> On Fri, Jun 24, 2016 at 4:47 PM, Barry Smith <[email protected]> wrote:
>
> > On Jun 24, 2016, at 9:35 AM, Mark Adams <[email protected]> wrote:
> >
> > Barry,
> >
> > ASM worked before GASM existed. I've never heard of GASM until yesterday,
> > other than seeing the directory in the source.
>
> Pretty impressive you never heard of GASM and yet YOU put the GASM code
> into GAMG
>
> a2f3521de src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2012-05-01
> 12:48:43 -0400 604)
> a2f3521de src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2012-05-01
> 12:48:43 -0400 605) /* set defaults */
> 806fa848a src/ksp/pc/impls/gamg/gamg.c (Barry Smith 2013-01-02
> 02:05:45 -0600 606) ierr = KSPSetType(smoother,
> KSPCHEBYSHEV);CHKERRQ(ierr);
> ffc955d6d src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2012-03-27
> 19:09:54 -0400 607)
> 1b18a24a4 src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2013-11-02
> 15:56:24 -0400 608) /* set blocks for GASM smoother that uses the
> 'aggregates' */
> 806fa848a src/ksp/pc/impls/gamg/gamg.c (Barry Smith 2013-01-02
> 02:05:45 -0600 609) if (pc_gamg->use_aggs_in_gasm) {
> 2d3561bba src/ksp/pc/impls/gamg/gamg.c (Satish Balay 2012-03-29
> 12:58:42 -0500 610) PetscInt sz;
> 2fa5cd679 src/ksp/pc/impls/gamg/gamg.c (Karl Rupp 2013-01-30
> 22:53:06 -0600 611) IS *is;
> a2f3521de src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2012-05-01
> 12:48:43 -0400 612)
> 2fa5cd679 src/ksp/pc/impls/gamg/gamg.c (Karl Rupp 2013-01-30
> 22:53:06 -0600 613) sz = nASMBlocksArr[level];
> 2fa5cd679 src/ksp/pc/impls/gamg/gamg.c (Karl Rupp 2013-01-30
> 22:53:06 -0600 614) is = ASMLocalIDsArr[level];
> 806fa848a src/ksp/pc/impls/gamg/gamg.c (Barry Smith 2013-01-02
> 02:05:45 -0600 615) ierr = PCSetType(subpc, PCGASM);CHKERRQ(ierr);
> 1b18a24a4 src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2013-11-02
> 15:56:24 -0400 616) ierr = PCGASMSetOverlap(subpc, 0);CHKERRQ(ierr);
> 7f66b68fb src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2015-08-11
> 09:52:40 -0400 617) if (!sz) {
> 2fa5cd679 src/ksp/pc/impls/gamg/gamg.c (Karl Rupp 2013-01-30
> 22:53:06 -0600 618) IS is;
> ffc955d6d src/ksp/pc/impls/gamg/gamg.c (Mark Adams 2012-03-27
> 19:09:54 -0400 619) PetscInt my0,kk;
> 806fa848a src/ksp/pc/impls/gamg/gamg.c (Barry Smith 2013-01-02
> 02:05:45 -0600 620) ierr = MatGetOwnershipRange(Aarr[level], &my0
>
> I think you put in the GASM but then forgot and thought you put in ASM.
>
> > It has been so long, I could probably hunt for a working version, but who
> > cares, we are going to roll back 5 years?
> >
> >
> > > In branch mark/gamg-agg-asm in ksp ex56, 'make runex56':
> >
> > I don't care about this! This is where you have tried to change from
> > GASM to ASM which I told you is non-trivial.
> > Give me the example and command line where the GASM version in master (or
> > maint) doesn't work where the error message includes ** Max-trans not
> > allowed because matrix is distributed
> >
> > Why do you want to debug GASM? I thought we wanted to use ASM. It is not
> > clear why converting from GASM to ASM is non-trivial, I could have done
> > this from the command line. This use aggregate-asm stuff just does what a
> > clever user might do.
> >
> >
> > We are not communicating very well, you jumped from stating GASM crashed
> > to monkeying with ASM and now refuse to tell me how to reproduce the GASM
> > crash.
> >
> > I don't think you want to mess with GASM, BUT if you run ksp/ex56 with:
> >
> > -pc_gamg_use_agg_gasm -mg_levels_pc_type gasm
> >
> > and remove the existing -mg_levels_pc_type sor, you should see an error
> > that Garth and I saw (eg, appended).
> >
> >
> > We have to start by fixing the current code to work with GASM (if it ever
> > worked) and then move on to using ASM (which is just an optimization of the
> > GASM usage.)
> >
> >
> > Are you sure? I am deep into debugging asm with DDT. I can switch to GASM
> > by just calling the GASM set block method and use gasm in the PC, and
> > continue with DDT debugging.
> >
> > Let me know.
> >
> >
> > 16:29 master *= ~/Codes/petsc/src/ksp/ksp/examples/tutorials$ make runex56
> > 1,4c1,85
> > < Linear solve converged due to CONVERGED_RTOL iterations 8
> > < Linear solve converged due to CONVERGED_RTOL iterations 8
> > < Linear solve converged due to CONVERGED_RTOL iterations 8
> > < [0]main |b-Ax|/|b|=1.940043e-04, |b|=4.969822e+00, emax=9.926090e-01
> > ---
> > > [1]PETSC ERROR:
> > > ------------------------------------------------------------------------
> > > [1]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
> > > probably memory access out of range
> > > [1]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> > > [1]PETSC ERROR: or see
> > > http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
> > > [1]PETSC ERROR: [2]PETSC ERROR:
> > > ------------------------------------------------------------------------
> > > [2]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
> > > probably memory access out of range
> > > [2]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> > > [2]PETSC ERROR: or see
> > > http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
> > > [2]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS
> > > X to find memory corruption errors
> > > [6]PETSC ERROR:
> > > ------------------------------------------------------------------------
> > > [6]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
> > > probably memory access out of range
> > > [6]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> > > [6]PETSC ERROR: or see
> > > http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
> > > [6]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS
> > > X to find memory corruption errors
> > > [4]PETSC ERROR:
> > > ------------------------------------------------------------------------
> > > [4]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
> > > probably memory access out of range
> > > [4]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> > > [4]PETSC ERROR: or see
> > > http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
> > > [4]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS
> > > X to find memory corruption errors
> > > [6]PETSC ERROR: likely location of problem given in stack below
> > > [6]PETSC ERROR: --------------------- Stack Frames
> > > ------------------------------------
> > > [6]PETSC ERROR: Note: The EXACT line numbers in the stack are not
> > > available,
> > > [6]PETSC ERROR: INSTEAD the line number of the start of the function
> > > [6]PETSC ERROR: is given.
> > > [6]PETSC ERROR: [6] MatGetSubMatrices_MPIAIJ_Local line 1228
> > > /Users/markadams/Codes/petsc/src/mat/impls/aij/mpi/mpiov.c
> > > [6]PETSC ERROR: [6] MatGetSubMatrices_MPIAIJ line 1131
> > > /Users/markadams/Codes/petsc/src/mat/impls/aij/mpi/mpiov.c
> > > [6]PETSC ERROR: [6] MatGetSubMatricesMPI_MPIXAIJ line 2163
> > > /Users/markadams/Codes/petsc/src/mat/impls/aij/mpi/mpiov.c
> > > [6]PETSC ERROR: [6] MatGetSubMatricesMPI_MPIAIJ line 2418
> > > /Users/markadams/Codes/petsc/src/mat/impls/aij/mpi/mpiov.c
> > > [6]PETSC ERROR: [6] MatGetSubMatricesMPI line 6805
> > > /Users/markadams/Codes/petsc/src/mat/interface/matrix.c
> > > [6]PETSC ERROR: [6] PCSetUp_GASM line 357
> > > /Users/markadams/Codes/petsc/src/ksp/pc/impls/gasm/gasm.c
> > > [6]PETSC ERROR: [6] PCSetUp line 930
> > > /Users/markadams/Codes/petsc/src/ksp/pc/interface/precon.c
> > > [6]PETSC ERROR: [6] KSPSetUp line 305
> > > /Users/markadams/Codes/petsc/src/ksp/ksp/interface/itfunc.c
> > > [6]PETSC ERROR: [6] PCSetUp_MG line 561
> > > /Users/markadams/Codes/petsc/src/ksp/pc/impls/mg/mg.c
> > > [6]PETSC ERROR: --------------------- Error Message
> > > --------------------------------------------------------------
> > > [6]PETSC ERROR: Signal received
>
>
