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gather.py
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Wed, Nov 13, 18:28

gather.py
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# Copyright (C) 2018-2020 by the RROMPy authors
#
# This file is part of RROMPy.
#
# RROMPy is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# RROMPy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with RROMPy. If not, see <http://www.gnu.org/licenses/>.
#
import numpy as np
from rrompy.utilities.base.types import Np1D, Np2D, List, ListAny
from .base import COMM, poolSize, forcedSerial, allowParallelExecution
__all__ = ['listGather', 'arrayGatherv', 'matrixGatherv']
def listGather(obj:ListAny, allow : bool = True) -> ListAny:
"""Gather list from parallel cores."""
if allow: allowParallelExecution(True)
if not forcedSerial() and poolSize() > 1:
objList = COMM.allgather(obj)
res = []
for dat in objList: res += dat
return res
return obj
def arrayGatherv(obj:Np1D, sizes:List[int], allow : bool = True) -> Np1D:
"""Gather vector from parallel cores."""
if allow: allowParallelExecution(True)
if not forcedSerial() and len(sizes) > 1:
out = np.empty(np.sum(sizes), dtype = obj.dtype)
COMM.Allgatherv(obj, [out, sizes])
return out
return obj
def matrixGatherv(obj:Np2D, sizes:List[int], allow : bool = True,
vertical : bool = False) -> Np2D:
"""Gather matrix from parallel cores."""
if allow: allowParallelExecution(True)
if not forcedSerial() and len(sizes) > 1:
if vertical:
length = obj.shape[1]
else:
length, obj = obj.shape[0], obj.T
out = arrayGatherv(obj.flatten(), [s * length for s in sizes],
False).reshape(-1, length)
if vertical: return out
return out.T
return obj

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