Assembly is needed after a call to x.setValues() or any of its variants. https://urldefense.us/v3/__https://petsc.org/main/petsc4py/reference/petsc4py.PETSc.Vec.html*petsc4py.PETSc.Vec.setValue__;Iw!!G_uCfscf7eWS!cvSh6J_ggyBtDLAEXjAIxkYQUbKkTTiA-QPyYNKZh3E_iJjftgP4afSVeUnPwdIE84eDB6to38b3rFjJg9yRB1QL$ Take into account that in python the notation x[i] = ... with call x.setValues() under the hood.
Jose > El 15 jul 2025, a las 12:02, SCOTTO Alexandre via petsc-users > <petsc-users@mcs.anl.gov> escribió: > > Dear PETSc community, > As a beginner in the MPI world and with the PETSc library, I come with a > possibly very naive question. > I know from the documentation that assembling vectors must be done, but it is > not clear to me when to perform this operation. > Is there a simple way to know when a vector need be assembled and when it is > not? > Thanks in advance. > Regards, > Alexandre.
