Could you please provide the full back trace? Depending on your set of options, it may be as simple as switching -bv_type to make your code run (if you are using svec, this would explain such an error but could be circumvented with something else, like mat).
Thanks, Pierre > On 30 Apr 2025, at 6:27 AM, Satish Balay <balay....@fastmail.org> wrote: > > On Wed, 30 Apr 2025, hexioafeng via petsc-users wrote: > >> Dear PETSc developers, >> >> I use PETSc and SLEPC to solve generalized eigen problems. When solving an >> interval eigen problem with matrix size about 5 million, i got the error >> message: "product of two integer xx xx overflow, you must ./configure PETSc >> with --with-64-bit-indices for the case you are running". >> >> I use some prebuilt third-party packages when building PETSc, namely >> OpenBLAS, METIS, ParMETIS and SCALAPACK. I wonder should i also use 64-bit >> prebuilt packages when configure PETSc with the --with-64-bit-indices flag? >> How about the MUMPS and MPI? Do i have to also use the b4-bit version? > > Hm - metis/parmetis would need a rebuild [with -DMETIS_USE_LONGINDEX=1 > option]. Others should be unaffected. > > You could use petsc configure to build pkgs to ensure compatibility i.e. use > --download-metis --download-parmetis etc.. > > Note - there is a difference between --with-64-bit-indices (PetscInt) and > --with-64-bit-blas-indices (PetscBlasInt) [and ILP64 - aka fortran '-i8'] > > Satish > > ---- > > $ grep defaultIndexSize config/BuildSystem/config/packages/*.py > config/BuildSystem/config/packages/hypre.py: if self.defaultIndexSize == > 64: > config/BuildSystem/config/packages/metis.py: if self.defaultIndexSize == > 64: > config/BuildSystem/config/packages/mkl_cpardiso.py: elif > self.blasLapack.has64bitindices and not self.defaultIndexSize == 64: > config/BuildSystem/config/packages/mkl_cpardiso.py: elif not > self.blasLapack.has64bitindices and self.defaultIndexSize == 64: > config/BuildSystem/config/packages/mkl_pardiso.py: elif > self.blasLapack.has64bitindices and not self.defaultIndexSize == 64: > config/BuildSystem/config/packages/mkl_sparse_optimize.py: if not > self.blasLapack.mkl or (not self.blasLapack.has64bitindices and > self.defaultIndexSize == 64): > config/BuildSystem/config/packages/mkl_sparse.py: if not > self.blasLapack.mkl or (not self.blasLapack.has64bitindices and > self.defaultIndexSize == 64): > config/BuildSystem/config/packages/SuperLU_DIST.py: if > self.defaultIndexSize == 64: > > > >> >> Look forward for your reply, thanks. >> >> Xiaofeng >
