1! Tests calling PetscOptionsSetValue() before PetscInitialize(): Fortran Example 2 3program main 4#include <petsc/finclude/petscsys.h> 5 use petscmpi ! or mpi or mpi_f08 6 use petscsys 7 8 implicit none 9 PetscErrorCode :: ierr 10 PetscMPIInt :: myRank,mySize 11 character(len=80) :: outputString 12 13 ! Every PETSc routine should begin with the PetscInitialize() routine. 14 15 call PetscOptionsSetValue(PETSC_NULL_OPTIONS,"-no_signal_handler","true",ierr) 16 call PetscInitialize(PETSC_NULL_CHARACTER,ierr) 17 if (ierr/=0) then 18 write(6,*) 'Unable to initialize PETSc' 19 stop 20 endif 21 22 ! Since when PetscInitialize() returns with an error the PETSc data structures 23 ! may not be set up hence we cannot call CHKERRA() hence directly return the error code. 24 25 ! Since PetscOptionsSetValue() is called before the PetscInitialize() we cannot call 26 ! CHKERRA() on the error code and just return it directly. 27 28 ! We can now change the communicator universe for PETSc 29 30 call MPI_Comm_size(MPI_COMM_WORLD,mySize,ierr); CHKERRA(ierr) 31 call MPI_Comm_rank(MPI_COMM_WORLD,myRank,ierr); CHKERRA(ierr) 32 write(outputString,*) 'Number of processors =',mySize,'rank =',myRank,'\n' 33 call PetscPrintf(PETSC_COMM_WORLD,outputString,ierr); CHKERRA(ierr) 34 call PetscFinalize(ierr) 35 36end program main 37 38!/*TEST 39! 40! test: 41! requires: define(PETSC_USE_LOG) 42! nsize: 2 43! args: -options_view -get_total_flops 44! filter: egrep -v "(malloc|display|nox|Total flops|saws_port_auto_select|vecscatter_mpi1|options_left|error_output_stdout|check_pointer_intensity|cuda_initialize|use_gpu_aware_mpi)" 45! 46!TEST*/ 47