[petsc-users] Error using Metis with PETSc installed with MUMPS
Pierre Jolivet
pierre at joliv.et
Fri Nov 3 13:33:50 CDT 2023
> On 3 Nov 2023, at 7:28 PM, Victoria Rolandi <victoria.rolandi93 at gmail.com> wrote:
>
> Pierre,
>
> Sure, I have now installed PETSc with MUMPS and PT-SCHOTCH, I got some errors at the beginning but then it worked adding --COPTFLAGS="-D_POSIX_C_SOURCE=199309L" to the configuration.
> Also, I have compilation errors when I try to use newer versions, so I kept the 3.17.0 for the moment.
You should ask for assistance to get the latest version.
(Par)METIS snapshots may have not changed, but the MUMPS one did, with performance improvements.
> Now the parallel ordering works with PT-SCOTCH, however, is it normal that I do not see any difference in the performance compared to sequential ordering ?
Impossible to tell without you providing actual figures (number of nnz, number of processes, timings with sequential ordering, etc.), but 699k is not that big of a problem, so that is not extremely surprising.
> Also, could the error using Metis/Parmetis be due to the fact that my main code (to which I linked PETSc) uses a different ParMetis than the one separately installed by PETSC during the configuration?
Yes.
> Hence should I configure PETSc linking ParMetis to the same library used by my main code?
Yes.
Thanks,
Pierre
> Thanks,
> Victoria
>
> Il giorno gio 2 nov 2023 alle ore 09:35 Pierre Jolivet <pierre at joliv.et <mailto:pierre at joliv.et>> ha scritto:
>>
>>> On 2 Nov 2023, at 5:29 PM, Victoria Rolandi <victoria.rolandi93 at gmail.com <mailto:victoria.rolandi93 at gmail.com>> wrote:
>>>
>>> Pierre,
>>> Yes, sorry, I'll keep the list in copy.
>>> Launching with those options (-mat_mumps_icntl_28 2 -mat_mumps_icntl_29 2) I get an error during the analysis step. I also launched increasing the memory and I still have the error.
>>
>> Oh, OK, that’s bad.
>> Would you be willing to give SCOTCH and/or PT-SCOTCH a try?
>> You’d need to reconfigure/recompile with --download-ptscotch (and maybe --download-bison depending on your system).
>> Then, the option would become either -mat_mumps_icntl_28 2 -mat_mumps_icntl_29 2 (PT-SCOTCH) or -mat_mumps_icntl_7 3 (SCOTCH).
>> It may be worth updating PETSc as well (you are using 3.17.0, we are at 3.20.1), though I’m not sure we updated the METIS/ParMETIS snapshots since then, so it may not fix the present issue.
>>
>> Thanks,
>> Pierre
>>
>>> The calculations stops at :
>>>
>>> Entering CMUMPS 5.4.1 from C interface with JOB, N = 1 699150
>>> executing #MPI = 2, without OMP
>>>
>>> =================================================
>>> MUMPS compiled with option -Dmetis
>>> MUMPS compiled with option -Dparmetis
>>> =================================================
>>> L U Solver for unsymmetric matrices
>>> Type of parallelism: Working host
>>>
>>> ****** ANALYSIS STEP ********
>>>
>>> ** Maximum transversal (ICNTL(6)) not allowed because matrix is distributed
>>> Using ParMETIS for parallel ordering
>>> Structural symmetry is: 90%
>>>
>>>
>>> The error:
>>>
>>> [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range
>>> [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
>>> [0]PETSC ERROR: or see https://petsc.org/release/faq/#valgrind
>>> [0]PETSC ERROR: or try http://valgrind.org <http://valgrind.org/> on GNU/linux and Apple MacOS to find memory corruption errors
>>> [0]PETSC ERROR: configure using --with-debugging=yes, recompile, link, and run
>>> [0]PETSC ERROR: to get more information on the crash.
>>> [0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
>>> [0]PETSC ERROR: Signal received
>>> [0]PETSC ERROR: See https://petsc.org/release/faq/ for trouble shooting.
>>> [0]PETSC ERROR: Petsc Release Version 3.17.0, unknown
>>> [0]PETSC ERROR: ./charlin.exe on a named n1056 by vrolandi Wed Nov 1 11:38:28 2023
>>> [0]PETSC ERROR: Configure options --prefix=/u/home/v/vrolandi/CODES/LIBRARY/packages/petsc/installationDir --with-cc=mpiicc --with-cxx=mpiicpc --with-fc=mpiifort CXXOPTFLAGS=-O3 --with-scalar-type=complex --with-debugging=0 --with-precision=single --download-mumps --download-scalapack --download-parmetis --download-metis
>>>
>>> [0]PETSC ERROR: #1 User provided function() at unknown file:0
>>> [0]PETSC ERROR: Run with -malloc_debug to check if memory corruption is causing the crash.
>>> Abort(59) on node 0 (rank 0 in comm 0): application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
>>>
>>>
>>> Thanks,
>>> Victoria
>>>
>>> Il giorno mer 1 nov 2023 alle ore 10:33 Pierre Jolivet <pierre at joliv.et <mailto:pierre at joliv.et>> ha scritto:
>>>> Victoria, please keep the list in copy.
>>>>
>>>>> I am not understanding how can I switch to ParMetis if it does not appear in the options of -mat_mumps_icntl_7.In the options I only have Metis and not ParMetis.
>>>>
>>>>
>>>> You need to use -mat_mumps_icntl_28 2 -mat_mumps_icntl_29 2
>>>>
>>>> Barry, I don’t think we can programmatically shut off this warning, it’s guarded by a bunch of KEEP() values, see src/dana_driver.F:4707, which are only settable/gettable by people with access to consortium releases.
>>>> I’ll ask the MUMPS people for confirmation.
>>>> Note that this warning is only printed to screen with the option -mat_mumps_icntl_4 2 (or higher), so this won’t show up for standard runs.
>>>>
>>>> Thanks,
>>>> Pierre
>>>>
>>>>> On 1 Nov 2023, at 5:52 PM, Barry Smith <bsmith at petsc.dev <mailto:bsmith at petsc.dev>> wrote:
>>>>>
>>>>>
>>>>> Pierre,
>>>>>
>>>>> Could the PETSc MUMPS interface "turn-off" ICNTL(6) in this situation so as to not trigger the confusing warning message from MUMPS?
>>>>>
>>>>> Barry
>>>>>
>>>>>> On Nov 1, 2023, at 12:17 PM, Pierre Jolivet <pierre at joliv.et <mailto:pierre at joliv.et>> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> On 1 Nov 2023, at 3:33 PM, Zhang, Hong via petsc-users <petsc-users at mcs.anl.gov <mailto:petsc-users at mcs.anl.gov>> wrote:
>>>>>>>
>>>>>>> Victoria,
>>>>>>> "** Maximum transversal (ICNTL(6)) not allowed because matrix is distributed
>>>>>>> Ordering based on METIS"
>>>>>>
>>>>>> This warning is benign and appears for every run using a sequential partitioner in MUMPS with a MATMPIAIJ.
>>>>>> (I’m not saying switching to ParMETIS will not make the issue go away)
>>>>>>
>>>>>> Thanks,
>>>>>> Pierre
>>>>>>
>>>>>> $ ../../../../arch-darwin-c-debug-real/bin/mpirun -n 2 ./ex2 -pc_type lu -mat_mumps_icntl_4 2
>>>>>> Entering DMUMPS 5.6.2 from C interface with JOB, N = 1 56
>>>>>> executing #MPI = 2, without OMP
>>>>>>
>>>>>> =================================================
>>>>>> MUMPS compiled with option -Dmetis
>>>>>> MUMPS compiled with option -Dparmetis
>>>>>> MUMPS compiled with option -Dpord
>>>>>> MUMPS compiled with option -Dptscotch
>>>>>> MUMPS compiled with option -Dscotch
>>>>>> =================================================
>>>>>> L U Solver for unsymmetric matrices
>>>>>> Type of parallelism: Working host
>>>>>>
>>>>>> ****** ANALYSIS STEP ********
>>>>>>
>>>>>> ** Maximum transversal (ICNTL(6)) not allowed because matrix is distributed
>>>>>> Processing a graph of size: 56 with 194 edges
>>>>>> Ordering based on AMF
>>>>>> WARNING: Largest root node of size 26 not selected for parallel execution
>>>>>>
>>>>>> Leaving analysis phase with ...
>>>>>> INFOG(1) = 0
>>>>>> INFOG(2) = 0
>>>>>> […]
>>>>>>
>>>>>>> Try parmetis.
>>>>>>> Hong
>>>>>>> From: petsc-users <petsc-users-bounces at mcs.anl.gov <mailto:petsc-users-bounces at mcs.anl.gov>> on behalf of Victoria Rolandi <victoria.rolandi93 at gmail.com <mailto:victoria.rolandi93 at gmail.com>>
>>>>>>> Sent: Tuesday, October 31, 2023 10:30 PM
>>>>>>> To: petsc-users at mcs.anl.gov <mailto:petsc-users at mcs.anl.gov> <petsc-users at mcs.anl.gov <mailto:petsc-users at mcs.anl.gov>>
>>>>>>> Subject: [petsc-users] Error using Metis with PETSc installed with MUMPS
>>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> I'm solving a large sparse linear system in parallel and I am using PETSc with MUMPS. I am trying to test different options, like the ordering of the matrix. Everything works if I use the -mat_mumps_icntl_7 2 or -mat_mumps_icntl_7 0 options (with the first one, AMF, performing better than AMD), however when I test METIS -mat_mumps_icntl_7 5 I get an error (reported at the end of the email).
>>>>>>>
>>>>>>> I have configured PETSc with the following options:
>>>>>>>
>>>>>>> --with-cc=mpiicc --with-cxx=mpiicpc --with-fc=mpiifort --with-scalar-type=complex --with-debugging=0 --with-precision=single --download-mumps --download-scalapack --download-parmetis --download-metis
>>>>>>>
>>>>>>> and the installation didn't give any problems.
>>>>>>>
>>>>>>> Could you help me understand why metis is not working?
>>>>>>>
>>>>>>> Thank you in advance,
>>>>>>> Victoria
>>>>>>>
>>>>>>> Error:
>>>>>>>
>>>>>>> ****** ANALYSIS STEP ********
>>>>>>> ** Maximum transversal (ICNTL(6)) not allowed because matrix is distributed
>>>>>>> Processing a graph of size: 699150 with 69238690 edges
>>>>>>> Ordering based on METIS
>>>>>>> 510522 37081376 [100] [10486 699150]
>>>>>>> Error! Unknown CType: -1
>>>>>>
>>>>>
>>>>
>>
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