Jed Brown writes: > On Thu, Dec 29, 2011 at 19:30, Dave Nystrom > <Dave.Nystrom at tachyonlogic.com>wrote: > > > Generally I use CG and LU from petsc. Cholesky runs slower than LU and I > > was > > told in a previous email that it was because of the extra data movement for > > Cholesky versus LU. I have also tried minres instead of CG and tend to get > > reduced iteration counts. But I think minres may have an extra dot product > > and so is a little more expensive than cg. But minres is usually cheaper > > over all because of the reduction in iterations. > > > > If you are concerned about solve time for serial runs, I would either use > Cholesky from MUMPS or CHOLMOD (install suitesparse, then -pc_type cholesky > -pc_factor_mat_solver_type cholmod).
I just browsed through the output of configure -help and don't see suitesparse. I do see stuff for cholmod but not a download option for cholmod.
