[petsc-dev] [petsc-maint #89809] 3D DMDAs in petsc-3.2
Barry Smith
bsmith at mcs.anl.gov
Sun Oct 9 15:28:40 CDT 2011
I have created a new test example in petsc-3.2 for 3D global to local with periodic boundary conditions and it fails rather completely so whomever introduced all the IXs, IXe stuff into DMSetUp_DA_3d() likely introduced some bugs, or the bugs have always been there and no one has tested it properly.
For example (with periodicity indicated only in the x direction) one gets:
barry-smiths-macbook-pro:tests barrysmith$ petscmpiexec -n 2 ./ex38 -da_view -stencil_width 1 | more
Processor [0] M 2 N 3 P 4 m 1 n 1 p 2 w 1 s 1
X range of indices: 0 2, Y range of indices: 0 3, Z range of indices: 0 2
Processor [1] M 2 N 3 P 4 m 1 n 1 p 2 w 1 s 1
X range of indices: 0 2, Y range of indices: 0 3, Z range of indices: 2 4
Vector Object: 1 MPI processes
type: seq
1
0
1
0
3
2
3
2
5
4
5
4
7
6
7
6
9
8
9
8
11
10
11
10
-1
112
113
-1
-1
114
115
-1
-1
116
117
-1
so it is not properly handling the periodicity on the "ghost plane" brought over from the rank 1 process to the rank 0.
Note this happens also with a stencil width of 1, so it is not just a question of not handling the stencil width correctly.
Barry
On Oct 9, 2011, at 1:32 PM, Richard Katz wrote:
>
> Here's how I set up the problem:
>
> ierr = DMDACreate3d(user->comm,DMDA_BOUNDARY_PERIODIC,DMDA_BOUNDARY_PERIODIC,DMDA_BOUNDARY_NONE,
> DMDA_STENCIL_BOX,p->Ni,p->Nj,p->Nk,1,1,PETSC_DECIDE,
> (PetscInt)(sizeof(SolVel3D)/sizeof(PetscReal)),2,
> PETSC_NULL,PETSC_NULL,PETSC_NULL,&user->dav);CHKERRQ(ierr);
> ierr = DMCreateGlobalVector(user->dav,&user->v);CHKERRQ(ierr);
> ierr = DMCreateGlobalVector(user->daa,&user->an);CHKERRQ(ierr);
> ierr = VecDuplicate(user->v,&user->vo);CHKERRQ(ierr);
> ierr = VecDuplicate(user->v,&user->vm);CHKERRQ(ierr);
> ierr = VecDuplicate(user->v,&user->rv);CHKERRQ(ierr);
> ierr = VecDuplicate(user->an,&user->ano);CHKERRQ(ierr);
> ierr = SNESCreate(user->comm,&user->snes);CHKERRQ(ierr);
> if (D2(p)) { ierr = SNESSetFunction(user->snes,user->rv,FormResidual_v2d,user);CHKERRQ(ierr); }
> else { ierr = SNESSetFunction(user->snes,user->rv,FormResidual_v3d,user);CHKERRQ(ierr); }
> ierr = DMGetColoring(user->dav,IS_COLORING_GLOBAL,MATAIJ,&iscoloring);
> ierr = DMGetMatrix(user->dav,MATAIJ,&user->Jv);CHKERRQ(ierr);
> ierr = MatFDColoringCreate(user->Jv,iscoloring,&user->mfdcv);
> ierr = MatFDColoringSetFromOptions(user->mfdcv);CHKERRQ(ierr);
> if (D2(p)) { ierr = MatFDColoringSetFunction(user->mfdcv,(PetscErrorCode(*)(void))FormResidual_v2d,user); }
> else { ierr = MatFDColoringSetFunction(user->mfdcv,(PetscErrorCode(*)(void))FormResidual_v3d,user); }
> ierr = SNESSetJacobian(user->snes,user->Jv,user->Jv,SNESDefaultComputeJacobianColor,user->mfdcv);
> ierr = ISColoringDestroy(&iscoloring);
> ierr = SNESSetOptionsPrefix(user->snes,"PV_");CHKERRQ(ierr);
> ierr = SNESSetFromOptions(user->snes);CHKERRQ(ierr);
>
>
> D2(p) is a macro that returns 1 if the problem is 2D, and 0 if 3D.
>
> Rich
>
>
> On 9 Oct 2011, at 19:30, Barry Smith wrote:
>
>>
>> box stencil or star stencil?
>>
>>
>> On Oct 9, 2011, at 1:26 PM, Richard Katz wrote:
>>
>>>
>>> On 9 Oct 2011, at 19:24, Barry Smith wrote:
>>>
>>>>
>>>> To clarify: With this build valgrind generates no messages at all?
>>>
>>> That's correct.
>>>
>>>
>>> [magmox:test]$ $PETSC_DIR/bin/petscmpiexec -valgrind -n 2 ../porbandsim -nd 3 -alpha 2 -theta 45 -output_file test2
>>> --94613-- run: /usr/bin/dsymutil "../porbandsim"
>>> --94612-- run: /usr/bin/dsymutil "../porbandsim"
>>> --------------porbandsim: Sun Oct 9 17:24:24 2011---------------
>>> Processes: 2, DOFs/Process: 2800
>>> #PETSc Option Table entries:
>>> -PV_snes_converged_reason
>>> -PV_snes_monitor
>>> -alpha 2
>>> -ksp_gmres_restart 150
>>> -nd 3
>>> -output_file test2
>>> -snes_converged_reason
>>> -snes_monitor
>>> -theta 45
>>> #End of PETSc Option Table entries
>>> -----------------------------------------------------------------
>>> PetscBag Object: ParameterBag params for porosity band simulation
>>> takei = TRUE; Use Takei & Holztman (2009) viscosity (T/F)
>>> hperm = FALSE; Use harmonic mean for computing permeability (T/F)
>>> lambda = 27; Porosity-weakening exponent in shear viscosity, dim'less
>>> R = 0.57735; Ratio compaction length to domain height, dim'less
>>> sigma_sat = 1; Saturation stress-difference for anisotropy, dim'less
>>> n = 3; Exponent in porosity--permeability relationship, dim'less
>>> phi0 = 0.1; Initial porosity, dim'less
>>> phi1 = 0.01; Amplitude of porosity perturbation, dim'less
>>> theta = 45; Fixed anisotropy angle, degrees (-1234567 indicates dynamic)
>>> alpha = 2; Fixed anisotropy magnitude, 0<=alpha<=2 (-1234567 indicates dynamic)
>>> viscratio = 1.66667; Ratio of bulk to shear viscosity at phi=phi0, dim'less
>>> nsig = 1; Exponent in stress--strain rate relationship, dim'less
>>> init_harmonic = FALSE; Use harmonic perturbation as IC (T/F)
>>> input_file = null; Name base for input porosity file
>>> test = FALSE; Just load parameters and then exit
>>> output_file = test2; Name base for output files
>>> output_all = FALSE; Make output after each time-step (T/F)
>>> output_err = TRUE; Make output after failed time-step (T/F)
>>> output_aux = TRUE; Output auxilliary fields (T/F)
>>> converged = TRUE; Indicates whether a time-step converged (NO SET)
>>> nb = 2; Number of buffer rows at top and bottom of domain
>>> ns = 1000000; Maximum number of time-steps
>>> nits = 1; Number of Picard iterations
>>> nplot = 0; Output counter
>>> advect = 1; Advection scheme: 0=FV, 1=Fromm, 2=TVD
>>> time = 0; Time at current step, dim'less
>>> cfl = 0.5; Courant-Friedrichs-Lewy number, dim'less
>>> tmax = 20; Maximimum simulated time, dim'less
>>> tout = 0.05; Output interval, dim'less
>>> nd = 3; Number of spatial dimensions, 2 or 3
>>> ni = 20; Grid points in x-direction (shear-direction, periodic)
>>> nj = 5; Grid points in y-direction (cross-direction, periodic)
>>> nk = 14; Grid points in z-direction, incl buffer points
>>> -------------------------END PARAM REPORT------------------------
>>> Continuation in lambda for initial condition
>>> 0 SNES Function norm 2.512586736188e+01
>>> 1 SNES Function norm 2.149396609776e-03
>>> 2 SNES Function norm 1.863405745330e-08
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Solved with lambda = 1.0 in 205.35 seconds
>>> 0 SNES Function norm 1.874271649438e+00
>>> 1 SNES Function norm 8.642606950729e-06
>>> 2 SNES Function norm 7.636114324949e-11
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Solved with lambda = 2.0 in 206.47 seconds
>>> 0 SNES Function norm 3.748572573117e+00
>>> 1 SNES Function norm 1.823985563954e-05
>>> 2 SNES Function norm 1.446658479082e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Solved with lambda = 4.0 in 207.02 seconds
>>> 0 SNES Function norm 7.498313656718e+00
>>> 1 SNES Function norm 3.949293531885e-05
>>> 2 SNES Function norm 3.092503935042e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Solved with lambda = 8.0 in 207.44 seconds
>>> 0 SNES Function norm 1.500973207738e+01
>>> 1 SNES Function norm 8.256012403101e-05
>>> 2 SNES Function norm 6.728525270322e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Solved with lambda = 16.0 in 207.38 seconds
>>> 0 SNES Function norm 2.066862203903e+01
>>> 1 SNES Function norm 6.201694512543e-05
>>> 2 SNES Function norm 5.537777484572e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Solved with lambda = 27.0 in 207.32 seconds
>>> Generating output file: "test2_0000"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 1.914413986104e+01
>>> 1 SNES Function norm 7.835942994856e-05
>>> 2 SNES Function norm 2.520454050827e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 2.038885321297e+01
>>> 1 SNES Function norm 1.727646593582e-04
>>> 2 SNES Function norm 1.325429214752e-09
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Stepped to time t = 0.050 in 213.4 seconds
>>> Generating output file: "test2_0001"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 1.592319862889e+01
>>> 1 SNES Function norm 5.602653646480e-05
>>> 2 SNES Function norm 2.453571869974e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 1.321599310609e+01
>>> 1 SNES Function norm 1.261023473773e-04
>>> 2 SNES Function norm 1.163959209038e-09
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Stepped to time t = 0.100 in 212.6 seconds
>>> Generating output file: "test2_0002"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 1.422948512067e+01
>>> 1 SNES Function norm 4.242156538283e-05
>>> 2 SNES Function norm 1.625303993154e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 9.675556760630e+00
>>> 1 SNES Function norm 1.362209365650e-04
>>> 2 SNES Function norm 1.223382062021e-09
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Stepped to time t = 0.150 in 212.9 seconds
>>> Generating output file: "test2_0003"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 1.307890574732e+01
>>> 1 SNES Function norm 3.214708350215e-05
>>> 2 SNES Function norm 1.093103013350e-10
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 7.636762082099e+00
>>> 1 SNES Function norm 1.308928801753e-04
>>> 2 SNES Function norm 1.143217709967e-09
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Stepped to time t = 0.200 in 212.8 seconds
>>> Generating output file: "test2_0004"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 1.216229064046e+01
>>> 1 SNES Function norm 2.441284335468e-05
>>> 2 SNES Function norm 7.517551623210e-11
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 6.371107649815e+00
>>> 1 SNES Function norm 1.185031269819e-04
>>> 2 SNES Function norm 1.095566218658e-09
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Stepped to time t = 0.250 in 213.0 seconds
>>> Generating output file: "test2_0005"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 1.136564194223e+01
>>> 1 SNES Function norm 1.865453423897e-05
>>> 2 SNES Function norm 5.239501925142e-11
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 5.520895480607e+00
>>> 1 SNES Function norm 1.025932275448e-04
>>> 2 SNES Function norm 1.071648118984e-09
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Stepped to time t = 0.300 in 213.0 seconds
>>> Generating output file: "test2_0006"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 1.064481900239e+01
>>> 1 SNES Function norm 1.438574893573e-05
>>> 2 SNES Function norm 3.643963189108e-11
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 4.905069034291e+00
>>> 1 SNES Function norm 8.961489700096e-05
>>> 2 SNES Function norm 1.008198626576e-09
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> Stepped to time t = 0.350 in 212.7 seconds
>>> Generating output file: "test2_0007"
>>> -----------------------------------------------------------------
>>> 0 SNES Function norm 9.981300326125e+00
>>> 1 SNES Function norm 1.120717450009e-05
>>> 2 SNES Function norm 2.503394538611e-11
>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>> 0 SNES Function norm 4.428377952757e+00
>>> ^CCtrl-C caught... cleaning up processes
>>>
>>>
>>>
>>>
>>>>
>>>> Barry
>>>>
>>>> On Oct 9, 2011, at 12:19 PM, Richard Katz wrote:
>>>>
>>>>> Hi Barry,
>>>>>
>>>>> I have now run the code with
>>>>>
>>>>> configure_options = [
>>>>> '--download-mpich=1',
>>>>> '--with-cxx=0',
>>>>> '--with-fortran=0',
>>>>> 'PETSC_ARCH=debug_mpich',
>>>>> ]
>>>>>
>>>>> and
>>>>>
>>>>> $PETSC_DIR/bin/petscmpiexec -valgrind -n 2 ../porbandsim -nd 3 -alpha 2 -theta 45 -output_file test2
>>>>>
>>>>> The memory error goes away.
>>>>>
>>>>> The error in the calculated solution does not go away.
>>>>>
>>>>> Thanks,
>>>>> Rich
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 9 Oct 2011, at 17:01, Barry Smith wrote:
>>>>>
>>>>>>
>>>>>> Rich,
>>>>>>
>>>>>> Could you do an identical run (to the valgrind run you made below) but using another PETSC_ARCH that uses --download-mpich
>>>>>>
>>>>>> I am suspecting openmpi because it is a bad read of something INSIDE OpenMPI that was just outside the range of memory allocated BY OpenMPI, it is hard to see how PETSc could induce this particular memory problem.
>>>>>>
>>>>>> Of course, it is also possible there are two bugs, one in OpenMPI and another in PETSc related to the DMDA.
>>>>>>
>>>>>> Barry
>>>>>>
>>>>>> On Oct 9, 2011, at 10:46 AM, Richard Katz wrote:
>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> I'm beginning to wonder if there is a bug in the filling of ghost-points for 3-dimensional DMDAs under petsc-3.2. I am working on a finite-volume code that uses a DMDACreate3d() to create several DMDAs, all with a stencil width of two.
>>>>>>>
>>>>>>> * The 2-dimensional mode for the same code runs without problems in parallel.
>>>>>>>
>>>>>>> * The initial SNES solve converges well, with no seg-faults, but when there are processor bounds in the k-direction, the solution is clearly incorrect at/near the boundaries.
>>>>>>>
>>>>>>> * When I run the same code in serial, or in parallel but with no processor boundaries in the k-direction, it works without problems.
>>>>>>>
>>>>>>> * When I run the code with processor boundaries in the k-direction, but zeroing-out the bits of the stencil that are at stencil-radius of 2, the processor-boundary errors don't appear.
>>>>>>>
>>>>>>> * Extending the stencil width to 3 has no effect on the problem.
>>>>>>>
>>>>>>> * There does seem to be a memory-corruption problem, but I'm not sure where it comes from, because it appears very high in the stack. The following is valgrind output for a run with 2 processors. The processor boundary is in the k-direction. This memory error ONLY appears on the first SNES solve, but not on any of the following ones. Also, the memory error seems to be associated with OpenMPI; it doesn't occur when running with MPICH2
>>>>>>>
>>>>>>> [magmox:test]$ $PETSC_DIR/bin/petscmpiexec -valgrind -n 2 ../porbandsim -malloc off -nd 3 -alpha 2 -theta 45 -output_file test2
>>>>>>>
>>>>>>> [...]
>>>>>>>
>>>>>>> Continuation in lambda for initial condition
>>>>>>> 0 SNES Function norm 2.512586736188e+01
>>>>>>> 1 SNES Function norm 2.149396609776e-03
>>>>>>> ==4576== Invalid read of size 8
>>>>>>> ==4576== at 0x7FFFFFE00BAC: ???
>>>>>>> ==4576== by 0x101A34213: ompi_convertor_pack (in /usr/lib/libmpi.0.dylib)
>>>>>>> ==4576== by 0x10858909E: mca_pml_ob1_send_request_start_copy (in /usr/lib/openmpi/mca_pml_ob1.so)
>>>>>>> ==4576== by 0x1085840D2: mca_pml_ob1_isend (in /usr/lib/openmpi/mca_pml_ob1.so)
>>>>>>> ==4576== by 0x1085D11C3: ompi_coll_tuned_allreduce_intra_recursivedoubling (in /usr/lib/openmpi/mca_coll_tuned.so)
>>>>>>> ==4576== by 0x101A4419B: MPI_Allreduce (in /usr/lib/libmpi.0.dylib)
>>>>>>> ==4576== by 0x1001D3F3E: VecMDot_MPI (pvec2.c:20)
>>>>>>> ==4576== by 0x100204669: VecMDot (rvector.c:1144)
>>>>>>> ==4576== by 0x10097E28B: KSPGMRESClassicalGramSchmidtOrthogonalization (borthog2.c:66)
>>>>>>> ==4576== by 0x100975B33: GMREScycle (gmres.c:159)
>>>>>>> ==4576== by 0x10097656E: KSPSolve_GMRES (gmres.c:231)
>>>>>>> ==4576== by 0x1009A8606: KSPSolve (itfunc.c:423)
>>>>>>> ==4576== by 0x100A0271A: SNES_KSPSolve (snes.c:3396)
>>>>>>> ==4576== by 0x100A17F79: SNESSolve_LS (ls.c:190)
>>>>>>> ==4576== by 0x1009FB635: SNESSolve (snes.c:2676)
>>>>>>> ==4576== by 0x100008104: InitSolveElliptic (initialize.c:216)
>>>>>>> ==4576== by 0x10000538A: FormInitialCondition (initialize.c:31)
>>>>>>> ==4576== by 0x100001410: main (porbandsim.c:28)
>>>>>>> ==4576== Address 0x10289f778 is 0 bytes after a block of size 136 alloc'd
>>>>>>> ==4576== at 0x1010B05BF: malloc (vg_replace_malloc.c:266)
>>>>>>> ==4576== by 0x1085D0F98: ompi_coll_tuned_allreduce_intra_recursivedoubling (in /usr/lib/openmpi/mca_coll_tuned.so)
>>>>>>> ==4576== by 0x101A4419B: MPI_Allreduce (in /usr/lib/libmpi.0.dylib)
>>>>>>> ==4576== by 0x1001D3F3E: VecMDot_MPI (pvec2.c:20)
>>>>>>> ==4576== by 0x100204669: VecMDot (rvector.c:1144)
>>>>>>> ==4576== by 0x10097E28B: KSPGMRESClassicalGramSchmidtOrthogonalization (borthog2.c:66)
>>>>>>> ==4576== by 0x100975B33: GMREScycle (gmres.c:159)
>>>>>>> ==4576== by 0x10097656E: KSPSolve_GMRES (gmres.c:231)
>>>>>>> ==4576== by 0x1009A8606: KSPSolve (itfunc.c:423)
>>>>>>> ==4576== by 0x100A0271A: SNES_KSPSolve (snes.c:3396)
>>>>>>> ==4576== by 0x100A17F79: SNESSolve_LS (ls.c:190)
>>>>>>> ==4576== by 0x1009FB635: SNESSolve (snes.c:2676)
>>>>>>> ==4576== by 0x100008104: InitSolveElliptic (initialize.c:216)
>>>>>>> ==4576== by 0x10000538A: FormInitialCondition (initialize.c:31)
>>>>>>> ==4576== by 0x100001410: main (porbandsim.c:28)
>>>>>>> ==4576==
>>>>>>> ==4577== Invalid read of size 8
>>>>>>> ==4577== at 0x7FFFFFE00BAC: ???
>>>>>>> ==4577== by 0x101A34213: ompi_convertor_pack (in /usr/lib/libmpi.0.dylib)
>>>>>>> ==4577== by 0x10858909E: mca_pml_ob1_send_request_start_copy (in /usr/lib/openmpi/mca_pml_ob1.so)
>>>>>>> ==4577== by 0x1085840D2: mca_pml_ob1_isend (in /usr/lib/openmpi/mca_pml_ob1.so)
>>>>>>> ==4577== by 0x1085D11C3: ompi_coll_tuned_allreduce_intra_recursivedoubling (in /usr/lib/openmpi/mca_coll_tuned.so)
>>>>>>> ==4577== by 0x101A4419B: MPI_Allreduce (in /usr/lib/libmpi.0.dylib)
>>>>>>> ==4577== by 0x1001D3F3E: VecMDot_MPI (pvec2.c:20)
>>>>>>> ==4577== by 0x100204669: VecMDot (rvector.c:1144)
>>>>>>> ==4577== by 0x10097E28B: KSPGMRESClassicalGramSchmidtOrthogonalization (borthog2.c:66)
>>>>>>> ==4577== by 0x100975B33: GMREScycle (gmres.c:159)
>>>>>>> ==4577== by 0x10097656E: KSPSolve_GMRES (gmres.c:231)
>>>>>>> ==4577== by 0x1009A8606: KSPSolve (itfunc.c:423)
>>>>>>> ==4577== by 0x100A0271A: SNES_KSPSolve (snes.c:3396)
>>>>>>> ==4577== by 0x100A17F79: SNESSolve_LS (ls.c:190)
>>>>>>> ==4577== by 0x1009FB635: SNESSolve (snes.c:2676)
>>>>>>> ==4577== by 0x100008104: InitSolveElliptic (initialize.c:216)
>>>>>>> ==4577== by 0x10000538A: FormInitialCondition (initialize.c:31)
>>>>>>> ==4577== by 0x100001410: main (porbandsim.c:28)
>>>>>>> ==4577== Address 0x10289f778 is 0 bytes after a block of size 136 alloc'd
>>>>>>> ==4577== at 0x1010B05BF: malloc (vg_replace_malloc.c:266)
>>>>>>> ==4577== by 0x1085D0F98: ompi_coll_tuned_allreduce_intra_recursivedoubling (in /usr/lib/openmpi/mca_coll_tuned.so)
>>>>>>> ==4577== by 0x101A4419B: MPI_Allreduce (in /usr/lib/libmpi.0.dylib)
>>>>>>> ==4577== by 0x1001D3F3E: VecMDot_MPI (pvec2.c:20)
>>>>>>> ==4577== by 0x100204669: VecMDot (rvector.c:1144)
>>>>>>> ==4577== by 0x10097E28B: KSPGMRESClassicalGramSchmidtOrthogonalization (borthog2.c:66)
>>>>>>> ==4577== by 0x100975B33: GMREScycle (gmres.c:159)
>>>>>>> ==4577== by 0x10097656E: KSPSolve_GMRES (gmres.c:231)
>>>>>>> ==4577== by 0x1009A8606: KSPSolve (itfunc.c:423)
>>>>>>> ==4577== by 0x100A0271A: SNES_KSPSolve (snes.c:3396)
>>>>>>> ==4577== by 0x100A17F79: SNESSolve_LS (ls.c:190)
>>>>>>> ==4577== by 0x1009FB635: SNESSolve (snes.c:2676)
>>>>>>> ==4577== by 0x100008104: InitSolveElliptic (initialize.c:216)
>>>>>>> ==4577== by 0x10000538A: FormInitialCondition (initialize.c:31)
>>>>>>> ==4577== by 0x100001410: main (porbandsim.c:28)
>>>>>>> ==4577==
>>>>>>> 2 SNES Function norm 1.863405745330e-08
>>>>>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>>>>>> 0 SNES Function norm 1.874271649438e+00
>>>>>>> 1 SNES Function norm 8.642606950729e-06
>>>>>>> 2 SNES Function norm 7.636114324949e-11
>>>>>>> Nonlinear solve converged due to CONVERGED_FNORM_ABS
>>>>>>>
>>>>>>> [...]
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Any suggestions about how to debug this? How well-tested are the parallel, 3D DMDA routines? Should I do some testing on a PETSc example code?
>>>>>>>
>>>>>>> I am running petsc-3.2 with
>>>>>>>
>>>>>>> changeset: 20338:fbd00cf1070e
>>>>>>> tag: tip
>>>>>>> parent: 20337:589176156279
>>>>>>> parent: 20336:7abcced43e69
>>>>>>> user: Barry Smith <bsmith at mcs.anl.gov>
>>>>>>> date: Tue Oct 04 16:45:00 2011 -0500
>>>>>>> summary: commit after merge
>>>>>>>
>>>>>>> and
>>>>>>>
>>>>>>> configure_options = [
>>>>>>> '--download-fftw=true',
>>>>>>> '--with-cxx=0',
>>>>>>> '--with-debugging=1',
>>>>>>> '--with-fortran=0',
>>>>>>> '--with-mpi-dir=/usr',
>>>>>>> 'PETSC_ARCH=debug',
>>>>>>> ]
>>>>>>>
>>>>>>> or
>>>>>>>
>>>>>>> configure_options = [
>>>>>>> '--download-blacs',
>>>>>>> '--download-fftw=true',
>>>>>>> '--download-mpich=yes',
>>>>>>> '--download-mumps=yes',
>>>>>>> '--download-parmetis',
>>>>>>> '--download-scalapack',
>>>>>>> '--with-cxx=0',
>>>>>>> '--with-debugging=0',
>>>>>>> 'PETSC_ARCH=optimize_mumps',
>>>>>>> ]
>>>>>>>
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Rich
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>> ________________________________
>>>>> Richard Foa Katz
>>>>> Dept Earth Sciences, Univ Oxford
>>>>> http://foalab.earth.ox.ac.uk
>>>>>
>>>>
>>>
>>> ________________________________
>>> Richard Foa Katz
>>> Dept Earth Sciences, Univ Oxford
>>> http://foalab.earth.ox.ac.uk
>>>
>>
>
> ________________________________
> Richard Foa Katz
> Dept Earth Sciences, Univ Oxford
> http://foalab.earth.ox.ac.uk
>
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