Gridap plugin to use PETSC (Portable, Extensible Toolkit for Scientific Computation).

GridapPETSc julia package requires the PETSC library (Portable, Extensible Toolkit for Scientific Computation) and MPI to work correctly. You have two main options to install these dependencies.

• Do nothing [recommended in most cases]. Use the default precompiled MPI installation provided by MPI.jl and the pre-compiled PETSc library provided by PETSc_jll. This will happen under the hood when you install GridapPETSc. You can also force the installation of these default dependencies by setting the environment variables JULIA_MPI_BINARY and JULIA_PETSC_LIBRARY to empty values.

• Choose a specific installation of MPI and PETSc available in the system [recommended in HPC clusters].

  • First, choose a MPI installation. See the documentation of MPI.jl for further details. An easy way to achieve this is to create the environment variable JULIA_MPI_BINARY containing the path to the MPI binary.
  • Second, choose a PETSc installation. To this end, create an environment variable JULIA_PETSC_LIBRARY containing the path to the dynamic library object of the PETSC installation (i.e., the .so file in linux systems). Very important: The chosen PETSc lirbary needs to be configured with the MPI installation considered in previous step.

GridapPETSc default sparse matrix format is 0-based compressed sparse row. This types of sparse matrix can be described by SparseMatrixCSR{0,PetscReal,PetscInt} and SymSparseMatrixCSR{0,PetscReal,PetscInt} implemented in the SparseMatricesCSR Julia package.