Gianluca: Checking Superlu source code SuperLU_4.3/SRC/dgssvx.c, this input format is required by superlu.
Hong Hong, > > thanks for your answer. I do not know if my problem request 64 bit support. > > My understanding is that I can preallocate the working array for > superlu with the PETSc database options -mat_superlu_lwork. Following > PETSc manual, this has to be specified in bytes. > > From my point of view, the problem is that I cannot pass to PETSc an > integer greater than 2.147.483.647 (that is, LONG_MAX), thus I am > limited to allocating roughly 2 GB of memory. If my factored matrix is > bigger, I have to rely on the mallocs/copy. > > Let me know if it is not clear yet. > > Gianlu > > > > > > On 3 July 2012 15:53, Hong Zhang <hzhang at mcs.anl.gov> wrote: > > Gianluca: > > > > Do you mean 64-bit support for superlu? > > I do not understand your request, thus forward your request to superlu > > developer. > > > > Hong > > > >> Dear all, > >> > >> I am trying to use superlu as solver for a large, sparse matrix, and I > >> would like to use -mat_superlu_lwork to speed up the computation. The > >> problem I encounter is that my lwork size I would need is greated than > >> the maximum value for an object of type long int and is not correctly > >> read by the code. > >> > >> Is there a workaround to that? Does using another solver (mumps > >> maybe?) solve this problem and, if so, which option should I use? > >> > >> Thanks in advance > >> > >> Gianluca > >> > >> -- > >> "[Je pense que] l'homme est un monde qui vaut des fois les mondes et > >> que les plus ardentes ambitions sont celles qui ont eu l'orgueil de > >> l'Anonymat" -- Non omnibus, sed mihi et tibi > >> Amedeo Modigliani > > > > > > > > -- > "[Je pense que] l'homme est un monde qui vaut des fois les mondes et > que les plus ardentes ambitions sont celles qui ont eu l'orgueil de > l'Anonymat" -- Non omnibus, sed mihi et tibi > Amedeo Modigliani > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120703/134497e6/attachment.html>
