PetscGlobalSum

 Computes the sum over sever processors

Synopsis

#include "petsc.h"   
int PetscGlobalSum(PetscScalar* local,PetscScalar* result,MPI_Comm comm)
Collective on MPI_Comm

Input Parameters

local - the local value
comm - the processors that find the sum

Output Parameter

result -the sum

Notes

These functions are to be used inside user functions that are to be processed with ADIC. PETSc will automatically provide differentiated versions of these functions

See Also

PetscGlobalMin(), PetscGlobalMax()

Level:intermediate
Location:src/sys/src/objects/pinit.c
Index of all Sys routines
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