def local_to_global_begin(self, dat, insert_mode):
assert insert_mode in {op2.INC, op2.MIN, op2.MAX}, "%s LtoG not supported" % insert_mode
if self.comm.size == 1:
return
mtype, builtin = _get_mtype(dat)
op = {(False, op2.INC): MPI.SUM,
(True, op2.INC): MPI.SUM,
(False, op2.MIN): _contig_min_op,
(True, op2.MIN): MPI.MIN,
(False, op2.MAX): _contig_max_op,
(True, op2.MAX): MPI.MAX}[(builtin, insert_mode)]
dmplex.halo_begin(self.sf, dat, mtype, True, op=op)
def local_to_global_begin(self, dat, insert_mode):
assert insert_mode in {op2.INC, op2.MIN,
op2.MAX}, "%s LtoG not supported" % insert_mode
if self.comm.size == 1:
return
mtype = _get_mtype(dat)
op = {
op2.INC: MPI.SUM,
op2.MIN: MPI.MIN,
op2.MAX: MPI.MAX
}[insert_mode]
dmplex.halo_begin(self.sf, dat, mtype, True, op=op)
def begin(self, dat, reverse=False):
"""Begin a halo exchange.
:arg dat: The :class:`pyop2.Dat` to start a halo exchange on.
:arg reverse: (optional) perform a reverse halo exchange.
.. note::
If ``reverse`` is ``True`` then the input buffer
may not be touched before calling :meth:`.end`."""
if self.comm.size == 1:
return
mtype = _get_mtype(dat)
dmplex.halo_begin(self.sf, dat, mtype, reverse)
def begin(self, dat, reverse=False):
"""Begin a halo exchange.
:arg dat: The :class:`pyop2.Dat` to start a halo exchange on.
:arg reverse: (optional) perform a reverse halo exchange.
.. note::
If ``reverse`` is ``True`` then the input buffer
may not be touched before calling :meth:`.end`."""
if self.comm.size == 1:
return
mtype = _get_mtype(dat)
dmplex.halo_begin(self.sf, dat, mtype, reverse)
def local_to_global_begin(self, dat, insert_mode):
assert insert_mode in {op2.INC, op2.MIN,
op2.MAX}, "%s LtoG not supported" % insert_mode
if self.comm.size == 1:
return
mtype, builtin = _get_mtype(dat)
op = {
(False, op2.INC): MPI.SUM,
(True, op2.INC): MPI.SUM,
(False, op2.MIN): _contig_min_op,
(True, op2.MIN): MPI.MIN,
(False, op2.MAX): _contig_max_op,
(True, op2.MAX): MPI.MAX
}[(builtin, insert_mode)]
dmplex.halo_begin(self.sf, dat, mtype, True, op=op)
def global_to_local_begin(self, dat, insert_mode):
assert insert_mode is op2.WRITE, "Only WRITE GtoL supported"
if self.comm.size == 1:
return
mtype, _ = _get_mtype(dat)
dmplex.halo_begin(self.sf, dat, mtype, False)
def global_to_local_begin(self, dat, insert_mode):
assert insert_mode is op2.WRITE, "Only WRITE GtoL supported"
if self.comm.size == 1:
return
mtype, _ = _get_mtype(dat)
dmplex.halo_begin(self.sf, dat, mtype, False)