On Mon, 28 May 2018, Najeeb Ahmad wrote: > Hi All, > > I have Petsc release version 3.9.2 configured with the following options: > > Configure options --with-cc=mpiicc --with-cxx=mpiicpc --with-fc=mpiifort > --download-fblaslapack=1 > > Now I want to use PCILU in my code and when I set the PC type to PCILU in > the code, I get the following error: > > [0]PETSC ERROR: --------------------- Error Message > -------------------------------------------------------------- > [0]PETSC ERROR: See > http://www.mcs.anl.gov/petsc/documentation/linearsolvertable.html for > possible LU and Cholesky solvers > [0]PETSC ERROR: Could not locate a solver package. Perhaps you must > ./configure with --download-<package> > [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for > trouble shooting. > [0]PETSC ERROR: Petsc Release Version 3.9.2, unknown > [0]PETSC ERROR: ./main on a arch-linux2-c-debug named Karachi by nahmad Mon > May 28 17:52:41 2018 > [0]PETSC ERROR: Configure options --with-cc=mpiicc --with-cxx=mpiicpc > --with-fc=mpiifort --download-fblaslapack=1 > [0]PETSC ERROR: #1 MatGetFactor() line 4318 in > /home/nahmad/PETSc/petsc/src/mat/interface/matrix.c > [0]PETSC ERROR: #2 PCSetUp_ILU() line 142 in > /home/nahmad/PETSc/petsc/src/ksp/pc/impls/factor/ilu/ilu.c > [0]PETSC ERROR: #3 PCSetUp() line 923 in > /home/nahmad/PETSc/petsc/src/ksp/pc/interface/precon.c > [0]PETSC ERROR: #4 KSPSetUp() line 381 in > /home/nahmad/PETSc/petsc/src/ksp/ksp/interface/itfunc.c > [0]PETSC ERROR: #5 KSPSolve() line 612 in > /home/nahmad/PETSc/petsc/src/ksp/ksp/interface/itfunc.c > [0]PETSC ERROR: #6 SolveSystem() line 60 in > /home/nahmad/Aramco/petsc/petsc/BlockSolveTest/src/main.c > > > I assume that I am missing LU package like SuperLU_dist for instance and I > need to download and configure it with Petsc.
yes - petsc has sequential LU - but you need superlu_dist/mumps for parallel lu. > > I am wondering what is the best way to reconfigure Petsc to download and > use the appropriate package to support PCILU? Rerun configure with the additional option --download-superlu_dist=1. You can do this with current PETSC_ARCH you are using [i.e reinstall over the current build] - or use a different PETSC_ARCH - so both builds exist and useable. Satish > > You advice is highly appreciated. > >
