A solver package providing direct solvers (LU) for distributed and sequential matrices via the external package PaStiX. Use ./configure --download-pastix --download-ptscotch to have PETSc installed with PasTiX
Use -pc_type lu -pc_factor_mat_solver_type pastix to use this direct solver
Options Database Keys
-mat_pastix_verbose <0,1,2>
- print level
-mat_pastix_threadnbr <integer>
- Set the thread number by MPI task.
Notes
This only works for matrices with symmetric nonzero structure, if you pass it a matrix with
nonsymmetric structure PasTiX and hence PETSc return with an error.