1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests calling PetscOptionsSetValue() before PetscInitialize()\n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown /*T 5*c4762a1bSJed Brown Concepts: introduction to PETSc; 6*c4762a1bSJed Brown Concepts: printing^in parallel 7*c4762a1bSJed Brown Processors: n 8*c4762a1bSJed Brown T*/ 9*c4762a1bSJed Brown 10*c4762a1bSJed Brown #include <petscsys.h> 11*c4762a1bSJed Brown int main(int argc,char **argv) 12*c4762a1bSJed Brown { 13*c4762a1bSJed Brown PetscErrorCode ierr; 14*c4762a1bSJed Brown PetscMPIInt rank,size; 15*c4762a1bSJed Brown 16*c4762a1bSJed Brown /* 17*c4762a1bSJed Brown Every PETSc routine should begin with the PetscInitialize() routine. 18*c4762a1bSJed Brown argc, argv - These command line arguments are taken to extract the options 19*c4762a1bSJed Brown supplied to PETSc and options supplied to MPI. 20*c4762a1bSJed Brown help - When PETSc executable is invoked with the option -help, 21*c4762a1bSJed Brown it prints the various options that can be applied at 22*c4762a1bSJed Brown runtime. The user can use the "help" variable place 23*c4762a1bSJed Brown additional help messages in this printout. 24*c4762a1bSJed Brown 25*c4762a1bSJed Brown Since when PetscInitialize() returns with an error the PETSc data structures 26*c4762a1bSJed Brown may not be set up hence we cannot call CHKERRQ() hence directly return the error code. 27*c4762a1bSJed Brown 28*c4762a1bSJed Brown Since PetscOptionsSetValue() is called before the PetscInitialize() we cannot call 29*c4762a1bSJed Brown CHKERRQ() on the error code and just return it directly. 30*c4762a1bSJed Brown */ 31*c4762a1bSJed Brown ierr = PetscOptionsSetValue(NULL,"-no_signal_handler","true");if (ierr) return ierr; 32*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 33*c4762a1bSJed Brown ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 34*c4762a1bSJed Brown ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = PetscPrintf(PETSC_COMM_WORLD,"Number of processors = %d, rank = %d\n",size,rank);CHKERRQ(ierr); 36*c4762a1bSJed Brown ierr = PetscFinalize(); 37*c4762a1bSJed Brown return ierr; 38*c4762a1bSJed Brown } 39*c4762a1bSJed Brown 40*c4762a1bSJed Brown 41*c4762a1bSJed Brown /*TEST 42*c4762a1bSJed Brown 43*c4762a1bSJed Brown test: 44*c4762a1bSJed Brown nsize: 2 45*c4762a1bSJed Brown args: -options_view -get_total_flops 46*c4762a1bSJed Brown filter: egrep -v "(cuda_initialize|malloc|display|nox|Total flops|saws_port_auto_select|vecscatter_mpi1|options_left|error_output_stdout|check_pointer_intensity)" 47*c4762a1bSJed Brown 48*c4762a1bSJed Brown TEST*/ 49