[petsc-users] How rto use multigrid?
w_ang_temp
w_ang_temp at 163.com
Thu Nov 1 08:57:51 CDT 2012
Hello, Matthew
Do you mean that the two versions have a different in this point? If I use the new version, I have to
make some modifications on my codes?
Thanks.
Jim
>在 2012-11-01 21:49:35，"Matthew Knepley" <knepley at gmail.com> 写道：
>On Thu, Nov 1, 2012 at 9:47 AM, w_ang_temp <w_ang_temp at 163.com> wrote:
>Hello,
> I have just used the latest version 'petsc-3.3-p4.tar.gz'. The codes which are ok under version 'petsc-3.2-p7.tar.gz'
>are not ok now. The error infomation is as follows. So if can I still use the original codes without any
>modification and also use multigrid with -pc_type gamg -pc_gamg_agg_nsmooths 1.
> Thanks.
Jim
>[0]PETSC ERROR: --------------------- Error Message ------------------------------------
>[0]PETSC ERROR: Object is in wrong state!
>[0]PETSC ERROR: Must call MatXXXSetPreallocation() or MatSetUp() on argument 1 "mat" before MatGetOwnershipRange()!
>This says what is wrong. Now you must either preallocate your matrix or turn of this error using MatSetOption()
> Matt
>>[0]PETSC ERROR: ------------------------------------------------------------------------
>>[0]PETSC ERROR: Petsc Release Version 3.3.0, Patch 4, Fri Oct 26 10:46:51 CDT 2012
>>[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: ./ex4f on a arch-linu named ubuntu by ubu Thu Nov 1 06:10:23 2012
>>[0]PETSC ERROR: Libraries linked from /home/ubu/soft/petsc/petsc-3.3-p4/arch-linux2-c-debug/lib
>>[0]PETSC ERROR: Configure run at Thu Nov 1 05:54:48 2012
>>[0]PETSC ERROR: Configure options --with-mpi-dir=/home/ubu/soft/mpich2/ --download-f-blas-lapack =1
>>[0]PETSC ERROR: ------------------------------------------------------------------------
>>[0]PETSC ERROR: MatGetOwnershipRange() line 5992 in src/mat/interface/matrix.c
>>[1]PETSC ERROR: [2]PETSC ERROR: --------------------- Error Message ------------------------------------
>>[2]PETSC ERROR: Object is in wrong state!
>>[2]PETSC ERROR: Must call MatXXXSetPreallocation() or MatSetUp() on argument 1 "mat" before MatGetOwnershipRange()!
>>[2]PETSC ERROR: ------------------------------------------------------------------------
>>[2]PETSC ERROR: Petsc Release Version 3.3.0, Patch 4, Fri Oct 26 10:46:51 CDT 2012
>>[2]PETSC ERROR: See docs/changes/index.html for recent updates.
>>[2]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>>[2]PETSC ERROR: See docs/index.html for manual pages.
>>[2]PETSC ERROR: ------------------------------------------------------------------------
>>[2]PETSC ERROR: ./ex4f on a arch-linu named ubuntu by ubu Thu Nov 1 06:10:23 2012
>>[2]PETSC ERROR: Libraries linked from /home/ubu/soft/petsc/petsc-3.3-p4/arch-linux2-c-debug/lib
>>[2]PETSC ERROR: Configure run at Thu Nov 1 05:54:48 2012
>>[2]PETSC ERROR: Configure options --with-mpi-dir=/home/ubu/soft/mpich2/ --download-f-blas-lapack =1
>>[2]PETSC ERROR: ------------------------------------------------------------------------
>>[2]PETSC ERROR: MatGetOwnershipRange() line 5992 in src/mat/interface/matrix.c
>>[3]PETSC ERROR: --------------------- Error Message ------------------------------------
>>[3]PETSC ERROR: Object is in wrong state!
>>[3]PETSC ERROR: Must call MatXXXSetPreallocation() or MatSetUp() on argument 1 "mat" before MatGetOwnershipRange()!
>>[3]PETSC ERROR: ------------------------------------------------------------------------
>>[3]PETSC ERROR: Petsc Release Version 3.3.0, Patch 4, Fri Oct 26 10:46:51 CDT 2012
>>[3]PETSC ERROR: See docs/changes/index.html for recent updates.
>>[3]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>>[3]PETSC ERROR: See docs/index.html for manual pages.
>>[3]PETSC ERROR: ------------------------------------------------------------------------
>>[3]PETSC ERROR: ./ex4f on a arch-linu named ubuntu by ubu Thu Nov 1 06:10:23 2012
>>[3]PETSC ERROR: Libraries linked from /home/ubu/soft/petsc/petsc-3.3-p4/arch-linux2-c-debug/lib
>>[3]PETSC ERROR: Configure run at Thu Nov 1 05:54:48 2012
>>[3]PETSC ERROR: Configure options --with-mpi-dir=/home/ubu/soft/mpich2/ --download-f-blas-lapack =1
>>[3]PETSC ERROR: ------------------------------------------------------------------------
>>[3]PETSC ERROR: MatGetOwnershipRange() line 5992 in src/mat/interface/matrix.c
>>--------------------- Error Message ------------------------------------
>>[1]PETSC ERROR: Object is in wrong state!
>>[1]PETSC ERROR: Must call MatXXXSetPreallocation() or MatSetUp() on argument 1 "mat" before MatGetOwnershipRange()!
>>[1]PETSC ERROR: ------------------------------------------------------------------------
>>[1]PETSC ERROR: Petsc Release Version 3.3.0, Patch 4, Fri Oct 26 10:46:51 CDT 2012
>>[1]PETSC ERROR: See docs/changes/index.html for recent updates.
>>[1]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>>[1]PETSC ERROR: See docs/index.html for manual pages.
>>[1]PETSC ERROR: ------------------------------------------------------------------------
>>[1]PETSC ERROR: ./ex4f on a arch-linu named ubuntu by ubu Thu Nov 1 06:10:23 2012
>>[1]PETSC ERROR: Libraries linked from /home/ubu/soft/petsc/petsc-3.3-p4/arch-linux2-c-debug/lib
>>[1]PETSC ERROR: Configure run at Thu Nov 1 05:54:48 2012
>>[1]PETSC ERROR: Configure options --with-mpi-dir=/home/ubu/soft/mpich2/ --download-f-blas-lapack =1
>>[1]PETSC ERROR: ------------------------------------------------------------------------
>>[1]PETSC ERROR: MatGetOwnershipRange() line 5992 in src/mat/interface/matrix.c
>>[1]PETSC ERROR: [2]PETSC ERROR: [3]PETSC ERROR: --------------------- Error Message ------------------------------------
>>[3]PETSC ERROR: Object is in wrong state!
>>[3]PETSC ERROR: Matrix is missing diagonal entry 0!
>>[3]PETSC ERROR: ------------------------------------------------------------------------
>>[3]PETSC ERROR: Petsc Release Version 3.3.0, Patch 4, Fri Oct 26 10:46:51 CDT 2012
>>[3]PETSC ERROR: See docs/changes/index.html for recent updates.
>>[3]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>>[3]PETSC ERROR: See docs/index.html for manual pages.
>>[3]PETSC ERROR: ------------------------------------------------------------------------
>>[3]PETSC ERROR: ./ex4f on a arch-linu named ubuntu by ubu Thu Nov 1 06:10:23 2012
>>[3]PETSC ERROR: Libraries linked from /home/ubu/soft/petsc/petsc-3.3-p4/arch-linux2-c-debug/lib
>>[3]PETSC ERROR: Configure run at Thu Nov 1 05:54:48 2012
>>[3]PETSC ERROR: Configure options --with-mpi-dir=/home/ubu/soft/mpich2/ --download-f-blas-lapack =1
>>[3]PETSC ERROR: ------------------------------------------------------------------------
>>[3]PETSC ERROR: MatILUFactorSymbolic_SeqAIJ_ilu0() line 1641 in src/mat/impls/aij/seq/aijfact.c
>>[3]PETSC ERROR: MatILUFactorSymbolic_SeqAIJ() line 1745 in src/mat/impls/aij/seq/aijfact.c
>>[3]PETSC ERROR: MatILUFactorSymbolic() line 6130 in src/mat/interface/matrix.c
>>[3]PETSC ERROR: PCSetUp_ILU() line 216 in src/ksp/pc/impls/factor/ilu/ilu.c
>>[3]PETSC ERROR: PCSetUp() line 832 in src/ksp/pc/interface/precon.c
>>[3]PETSC ERROR: KSPSetUp() line 278 in src/ksp/ksp/interface/itfunc.c
>>[3]PETSC ERROR: PCSetUpOnBlocks_BJacobi_Singleblock() line 715 in src/ksp/pc/impls/bjacobi/bjacobi.c
>>[3]PETSC ERROR: PCSetUpOnBlocks() line 865 in src/ksp/pc/interface/precon.c
>>[3]PETSC ERROR: KSPSetUpOnBlocks() line 154 in src/ksp/ksp/interface/itfunc.c
>>[3]PETSC ERROR: KSPSolve() line 403 in src/ksp/ksp/interface/itfunc.c
>>Fatal error in MPI_Send: Invalid count, error stack:
>>MPI_Send(173): MPI_Send(buf=0x100, count=-199040697, MPI_REAL, dest=0, tag=3, MPI_COMM_WORLD) failed
>>MPI_Send(97).: Negative count, value is -199040697
>在 2012-10-29 21:57:49，"Mark F. Adams" <mark.adams at columbia.edu> 写道：
>You need an updated PETSc. (I thought 3.2 had an early version of gamg … but you need 3.3 or dev)
>Mark
>On Oct 29, 2012, at 8:49 AM, w_ang_temp <w_ang_temp at 163.com> wrote:
>Hello, Jed
> I use the command:
> mpiexec -n 4 ./ex4f -ksp_type cgs -pc_type gamg -pc_gamg_agg_nsmooths 1 -ksp_rtol 1.0e-15 -ksp_converged_reason
> The error is as follows:
>[0]PETSC ERROR: --------------------- Error Message ------------------------------------
>[0]PETSC ERROR: Unknown type. Check for miss-spelling or missing external package needed for type
> seehttp://www.mcs.anl.gov/petsc/petsc-as/documentation/installation.html#external!
>[0]PETSC ERROR: Unable to find requested PC type gamg!
>[0]PETSC ERROR: ------------------------------------------------------------------------
>[0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 7, Thu Mar 15 09:30:51 CDT 2012
>[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: ./ex4f on a arch-linu named ubuntu by geo Mon Oct 29 05:40:13 2012
>[0]PETSC ERROR: Libraries linked from /home /geo/soft/petsc/petsc-3.2-p7/arch-linux2-c-opt/lib
>[0]PETSC ERROR: Configure run at Mon Jul 2 20:33:17 2012
>[0]PETSC ERROR: Configure options --with-mpi-dir=/home/geo/soft/mpich2 --download-f-blas-lapack=1 --with-x=1 --with-debugging=0 -->download-parmetis --download-mumps --download-scalapack --download-blacs
>[0]PETSC ERROR: ------------------------------------------------------------------------
>[0]PETSC ERROR: PCSetType() line 67 in src/ksp/pc/interface/pcset.c
>[0]PETSC ERROR: PCSetFromOptions() line 184 in src/ksp/pc/interface/pcset.c
>[0]PETSC ERROR: KSPSetFromOptions() line 286 in src/ksp/ksp/interface/itcl.c
> When I use 'mpiexec -n 4 ./ex4f -ksp_type cgs -pc_type sor -ksp_rtol 1.0e-15 -ksp_converged_reason', it is ok. So
>what is the possible reason?
> Thanks.
> Jim
>>At 2012-10-28 22:25:31,"Jed Brown" <jedbrown at mcs.anl.gov> wrote:
>>Try the simple option I just sent.
>>On Oct 28, 2012 6:38 AM, "w_ang_temp" <w_ang_temp at 163.com> wrote:
>>Hello, Jed
>> Thanks for your timely reply. I deal with the soil-water coupled problem in geotechnical engineering,
>>whose stiffness matrix is ill-conditioned. I have did some work about it, mainly finding the effective
>>solvers and preconditioners. I used the command line option like this:
>>mpiexec -n 4 ./ex4f -ksp_type cgs -pc_type sor -ksp_rtol 1.0e-15 -ksp_converged_reason.
>> So, I also want to use the multigrid just like the simple command. There is only a little introduction
>>about multigrid in the manual. Multigrid is complex and not a easy thing for me, so I just need to konw how
>>to use it simply in PETSc to solve the Ax=b system.
>> Thanks.
Jim
>At 2012-10-28 21:17:00,"Jed Brown" <jedbrown at mcs.anl.gov> wrote:
>Algebraic multigrid can be used directly, -pc_type gamg -pc_gamg_agg_nsmooths 1. Geometric either required that you use the PCMG interface to set >interpolation (and provide a coarse operator for non-Galerkin) or use a DM that provides coarsening capability.
>What kind of problem are you solving?
>>On Oct 28, 2012 6:09 AM, "w_ang_temp" <w_ang_temp at 163.com> wrote:
>>Hello,
>> I want to use the multigrid as a preconditioner. The introduction about it in the manual is little.
>>So are there some typical examples or details about multigrid? Is it used just like other preconditioners
>>like jacobi, sor, which can be simply used in the cammand line options?
>> Thanks.
>> Jim
--
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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