[petsc-dev] Fwd: no petsc on Edison

[Barry Smith]

   Hong,

   Yes this looks like a regression in these MatMatMult routines, they now require unscalable memory


> On Jan 11, 2017, at 2:15 PM, Satish Balay <balay at mcs.anl.gov> wrote:
> 
>>>> 
> aN=A->cmap->N
> ierr = PetscTableCreate(aN,aN,&ta);CHKERRQ(ierr);
> <<<
> 
> Looks like thats a 'global' size. That doesn't look right.
> 
> https://bitbucket.org/petsc/petsc/commits/c373ccc6#chg-src/mat/impls/aij/mpi/mpimatmatmult.c
> 
> I see Hong had previously updated this code. Will have to recheck..
> 
> Satish
> 
> On Wed, 11 Jan 2017, Mark Adams wrote:
> 
>>> 
>>> 
>>> Must be the same place Fande encountered this error.
>>> 
>>> 
>> Satish, here is our stack trace. Do you have any thoughts vis-a-vis Fande's
>> experience what the problem is here?  My best guess is that the local
>> matrix size is huge, but this code can have some very large stencils.
>> 
>> Treb: about how many processors have this error? Is is it just one, a few,
>> or tons?
>> 
>> [5]PETSC ERROR: Argument out of range
>> [5]PETSC ERROR: A really huge hash is being requested.. cannot process:
>> 67108864
>> [5]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for
>> trouble shooting.
>> [5]PETSC ERROR: Petsc Development GIT revision: v3.7.4-2584-g7175242 GIT
>> Date: 2016-12-21 13:19:16 -0600
>> [5]PETSC ERROR: /tmp/targetExec on a arch-xc30-dbg64-intel named nid00013
>> by u6338 Sat Jan  7 18:35:34 2017
>> [5]PETSC ERROR: Configure options --COPTFLAGS="-O0 -g -no-ipo"
>> --CXXOPTFLAGS="-O0 -g -no-ipo" --FOPTFLAGS="-O0 -g -ipo"
>> --download-parmetis --download-metis --download-hypre --with-ssl=0
>> --with-cc=cc --with-clib-autodetect=0 --with-cxx=CC
>> --with-cxxlib-autodetect=0 --with-debugging=1 --with-fc=ftn
>> --with-fortranlib-autodetect=0 --with-shared-libraries=0 --with-x=0
>> --with-mpiexec=srun LIBS=-lstdc++ --with-64-bit-indices
>> --prefix=/global/homes/m/madams/petsc_install/petscv3.7-xc3[1983]PETSC
>> ERROR: --------------------- Error Message ------------------------------
>> --------------------------------
>> 
>> [5]PETSC ERROR: [522]PETSC ERROR: --------------------- Error Message
>> ----------
>> 
>> [5]PETSC ERROR: #2 PetscTableCreate() line 52 in
>> /global/u2/m/madams/petsc_install/petsc/src/sys/utils/ctable.c
>> [5]PETSC ERROR: #3 MatTransposeMatMultSymbolic_MPIAIJ_MPIAIJ() line 1691 in
>> /global/u2/m/madams/petsc_install/petsc/src/mat/impls/aij/
>> mpi/mpimatmatmult.c
>> [5]PETSC ERROR: #4 MatTransposeMatMult_MPIAIJ_MPIAIJ() line 917 in
>> /global/u2/m/madams/petsc_install/petsc/src/mat/impls/aij/
>> mpi/mpimatmatmult.c
>> [5]PETSC ERROR: [608]PETSC ERROR: --------------------- Error Message
>> ----------
>> 
>> [5]PETSC ERROR: #6 PCGAMGCoarsen_AGG() line 955 in
>> /global/u2/m/madams/petsc_install/petsc/src/ksp/pc/impls/gamg/agg.c
>> [5]PETSC ERROR: #7 PCSetUp_GAMG() line 524 in /global/u2/m/madams/petsc_inst
>> all/petsc/src/ksp/pc/impls/gamg/gamg.c
>> [5]PETSC ERROR: #8 PCSetUp() line 968 in /global/u2/m/madams/petsc_inst
>> all/petsc/src/ksp/pc/interface/precon.c
>> [5]PETSC ERROR: #9 KSPSetUp() line 393 in /global/u2/m/madams/petsc_inst
>> all/petsc/src/ksp/ksp/interface/itfunc.c
>> [5]PETSC ERROR: [1640]PETSC ERROR: --------------------- Error Message -----
>> 
>> 
>>> MatSetUpMultiply_MPIAIJ() does:
>>> 
>>>  ierr = PetscTableCreate(aij->B->rmap->n,mat->cmap->N+1,&gid1_lid1);
>>> CHKERRQ(ierr);
>>> 
>>> So the local matrix size (n) must be: 4294967296
>>> 
>>> [assuming atleast one nonzero per row - the local matrix itself must use
>>> more memory than the hash-table..]
>>> 
>>> Satish
>>> 
>> 
>