PetscSFFetchAndOpWithMemTypeBegin#

begin operation with explicit memory types that fetches values from root and updates atomically by applying operation using my leaf value, to be completed with PetscSFFetchAndOpEnd()

Synopsis#

#include "petscsf.h" 
PetscErrorCode PetscSFFetchAndOpWithMemTypeBegin(PetscSF sf, MPI_Datatype unit, PetscMemType rootmtype, void *rootdata, PetscMemType leafmtype, const void *leafdata, PetscMemType leafupdatemtype, void *leafupdate, MPI_Op op)

Collective

Input Parameters#

  • sf - star forest

  • unit - data type

  • rootmtype - memory type of rootdata

  • leafmtype - memory type of leafdata

  • leafdata - leaf values to use in reduction

  • leafupdatemtype - memory type of leafupdate

  • op - operation to use for reduction

Output Parameters#

  • rootdata - root values to be updated, input state is seen by first process to perform an update

  • leafupdate - state at each leaf’s respective root immediately prior to my atomic update

Note#

See PetscSFFetchAndOpBegin() for more details.

See Also#

PetscSF, PetscSFFetchAndOpBegin(), PetscSFComputeDegreeBegin(), PetscSFReduceBegin(), PetscSFSetGraph(), PetscSFFetchAndOpEnd()

Level#

advanced

Location#

src/vec/is/sf/interface/sf.c

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Index of all PetscSF routines
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