PetscShmgetMapAddresses

given shared address on the first MPI process determines the addresses on the other MPI processes that map to the same physical memory

Synopsis

PetscErrorCode PetscShmgetMapAddresses(MPI_Comm comm, PetscInt n, const void **baseaddres, void **addres)

Input Parameters

• comm - the MPI_Comm to scatter the address

• n - the number of addresses, each obtained on MPI process zero by PetscShmgetAllocateArray()

• baseaddres - the addresses on the first MPI process, ignored on all but first process

Output Parameter

• addres - the addresses on each MPI process, the array of void * must already be allocated

Note

This routine does nothing if PETSC_HAVE_SHMGET is not defined

See Also

PetscShmgetDeallocateArray(), PetscShmgetAllocateArray(), PetscShmgetUnmapAddresses()

Level

developer

Location

src/sys/utils/server.c

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