Download/Install superlu_dist/mumps/MPI/cmake Output Install Activate PETSc Add dir to PATH Check Activation thru GridapPETSc If it tells the path where you installed your PETSc, it is done. Install OpenBLAS with multi-threading Install OpenBLAS which has multi-threading version Re-Compile PETSc with the OpenBLAS Check the link with OpenBLAS Compile PETSc with MKL Install MKL Compile Check