On Jun 12, 2011, at 1:48 AM, Mohammad Mirzadeh wrote: > I guess I figured it out. On 64-bit OS long long and long are the same and I > may as well just use --with-64-bit-ints flag.
You only need to configure PETSc with --with-64-bit-indices if you are dealing with problems with over 2 billion unknowns (in parallel) or if the sparse matrix will have more than 2 billion nonzeros on a single process. You do not need to use --with-64-bit-indices just because you are using 64 bit pointers, only for really large problems. Barry > > Thanks > > > On Sat, Jun 11, 2011 at 11:22 PM, Mohammad Mirzadeh <mirzadeh at gmail.com> > wrote: > Hi guys, > > How can I use long int instead of PetscInt in the functions? Does simply > changing the definition of PetscInt solve the problem? > > Thanks >
