[petsc-users] PetscTableCreateHashSize

[Kong, Fande]

Thanks, Satish,


On Mon, Jan 9, 2017 at 12:36 PM, Satish Balay <balay at mcs.anl.gov> wrote:

> We can add more entries to the lookup. The stack below looks
> incomplete. Which routine is calling PetscTableCreateHashSize() with
> this big size?
>

call trace:

[4]PETSC ERROR: #3 MatSetUpMultiply_MPIAIJ() line 36 in
/home/schuseba/projects/64_bit_builds/petsc/src/mat/impls/aij/mpi/mmaij.c

[9]PETSC ERROR: #4 MatAssemblyEnd_MPIAIJ() line 747 in
/home/schuseba/projects/64_bit_builds/petsc/src/mat/impls/aij/mpi/mpiaij.c

[9]PETSC ERROR: #4 MatAssemblyEnd_MPIAIJ() line 747 in
/home/schuseba/projects/64_bit_builds/petsc/src/mat/impls/aij/mpi/mpiaij.c


>
> Satish
>
> -------
> $ git diff
> diff --git a/src/sys/utils/ctable.c b/src/sys/utils/ctable.c
> index cd64284..761a2c6 100644
> --- a/src/sys/utils/ctable.c
> +++ b/src/sys/utils/ctable.c
> @@ -25,6 +25,7 @@ static PetscErrorCode PetscTableCreateHashSize(PetscInt
> sz, PetscInt *hsz)
>    else if (sz < 819200)  *hsz = 1193557;
>    else if (sz < 1638400) *hsz = 2297059;
>    else if (sz < 3276800) *hsz = 4902383;
> +  else if (sz < 6553600) *hsz = 9179113;
>    else SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"A really huge
> hash is being requested.. cannot process: %D",sz);
>    PetscFunctionReturn(0);
>  }
>
> On Mon, 9 Jan 2017, Kong, Fande wrote:
>
> > Hi All,
> >
> > Hash size is set manually according to the number of expected keys in the
> > function PetscTableCreateHashSize(). Any reason to restrict the
> > ``n"<3276800?
> >
> > One user here encountered an issue because of this restriction. The
> > messages are as follows:
> >
> > [3]PETSC ERROR: --------------------- Error Message
> > --------------------------------------------------------------
> >
> > [3]PETSC ERROR: Argument out of range
> >
> > [3]PETSC ERROR: A really huge hash is being requested.. cannot process:
> > 3497472
> >
> > [3]PETSC ERROR: See https://urldefense.proofpoint.
> com/v2/url?u=http-3A__www.mcs.anl.gov_petsc_documentation_
> faq.html&d=DQIBAg&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB_
> _aEkJFOKJFd00&r=DUUt3SRGI0_JgtNaS3udV68GRkgV4ts7XKfj2opmiCY&m=
> fvlOBYaS6Bzg7U320hXOmDVca3d6OkyJnp56sjG6pG8&s=
> Rp5eqZDYZPxEHWb7SoQwATm41rJPVIolrCKuUGdM72U&e=  for
> > trouble shooting.
> >
> > [3]PETSC ERROR: Petsc Release Version 3.7.4, unknown
> >
> > [3]PETSC ERROR: /home/schuseba/projects/64_bit_builds/yak/yak-opt on a
> > linux-gnu-c-opt named r3i3n0 by schuseba Fri Jan  6 23:15:37 2017
> >
> > [3]PETSC ERROR: Configure options --download-hypre=1 --with-ssl=0
> > --with-debugging=no --with-pic=1 --with-shared-libraries=1
> > --with-64-bit-indices=1 --with-cc=mpicc --with-cxx=mpicxx
> --with-fc=mpif90
> > --download-metis=1 --download-parmetis=1 --download-fblaslapack=1
> > --download-superlu_dist=1 -CC=mpicc -CXX=mpicxx -FC=mpif90 -F77=mpif77
> > -F90=mpif90 -CFLAGS="-fPIC -fopenmp" -CXXFLAGS="-fPIC -fopenmp"
> > -FFLAGS="-fPIC -fopenmp" -FCFLAGS="-fPIC -fopenmp" -F90FLAGS="-fPIC
> > -fopenmp" -F77FLAGS="-fPIC -fopenmp"
> >
> > [3]PETSC ERROR: #1 PetscTableCreateHashSize() line 28 in
> > /home/schuseba/projects/64_bit_builds/petsc/src/sys/utils/ctable.c
> >
> >
> >
> >
> >
> > Fande,
> >
>
>
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