AOCreateMemoryScalable

Creates a memory scalable application ordering using two integer arrays.

Synopsis

#include "petscao.h"   
PetscErrorCode AOCreateMemoryScalable(MPI_Comm comm, PetscInt napp, const PetscInt myapp[], const PetscInt mypetsc[], AO *aoout)

Collective

Input Parameters

• comm - MPI communicator that is to share the AO

• napp - size of myapp and mypetsc

• myapp - integer array that defines an ordering

• mypetsc - integer array that defines another ordering (may be NULL to indicate the natural ordering, that is 0,1,2,3,…)

Output Parameter

• aoout - the new application ordering

Note

The arrays myapp and mypetsc must contain the all the integers 0 to napp-1 with no duplicates; that is there cannot be any “holes” in the indices. Use AOCreateMapping() or AOCreateMappingIS() if you wish to have “holes” in the indices. Comparing with AOCreateBasic(), this routine trades memory with message communication.

See Also

Application Orderings, Low-level Vector Communication, AO, AOCreateMemoryScalableIS(), AODestroy(), AOPetscToApplication(), AOApplicationToPetsc()

Level

beginner

Location

src/vec/is/ao/impls/memscalable/aomemscalable.c

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Index of all AO routines
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Index of all manual pages