def reduce(self, k, phi, psi_n, psi_l, psi_r):
"""Reduce skeleton for distributed tree
The parameters must respect these equalities (closure property):
* k(l, b, r) = psi_n(l, phi(b), r)
* psi_n(psi_n(value, l, y), b, r) = psi_n(value, psi_l(l,b,r), y)
* psi_n(l, b, psi_n(value, r, y)) = psi_n(value, psi_r(l,b,r), y)
Parameters
----------
k : callable
The function used to reduce a BTree into a single value
phi : callable
A function used to respect the closure property to allow partial computation
psi_n : callable
A function used to respect the closure property to make partial computation
psi_l : callable
A function used to respect the closure property to make partial computation on the left
psi_r : callable
A function used to respect the closure property to make partial computation on the right
"""
logger.debug(
'[START] PID[' + str(PID) + '] reduce skeleton')
# Step 1 : Local Reduction
gt = Segment([None] * self.__nb_segs)
i = 0
for (start, offset) in self.__global_index[self.__start_index: self.__start_index + self.__nb_segs]:
logger.debug('[START] PID[' + str(PID) + '] reduce_local from ' + str(start) + ' to ' + str(start + offset))
gt[i] = Segment(self.__content[start:start + offset]).reduce_local(k, phi, psi_l, psi_r)
logger.debug('[END] PID[' + str(PID) + '] reduce_local from ' + str(start) + ' to ' + str(start + offset))
i = i+1
# Step 2 : Gather local Results
if PID == 0:
for i in range(1, NPROCS):
logger.debug(
'[START] PID[' + str(PID) + '] reception from ' + str(i))
gt.extend(COMM.recv(source=i, tag=TAG_COMM_REDUCE)['c'])
logger.debug(
'[END] PID[' + str(PID) + '] reception from ' + str(i))
else:
logger.debug(
'[START] PID[' + str(PID) + '] emission to ' + str(0))
COMM.send({'c': gt}, dest=0, tag=TAG_COMM_REDUCE)
logger.debug(
'[END] PID[' + str(PID) + '] emission to ' + str(0))
# Step 3 : Global Reduction
par.at_root(lambda: logger.debug('[START] PID[' + str(PID) + '] reduce_global'))
res = gt.reduce_global(psi_n) if PID == 0 else None
par.at_root(lambda: logger.debug('[END] PID[' + str(PID) + '] reduce_global'))
logger.debug(
'[END] PID[' + str(PID) + '] reduce skeleton')
return res
def __global_upwards_accumulation(psi_n, gt):
gt2 = None
if PID == 0:
par.at_root(
lambda: logger.debug('[START] PID[%s] uacc_global', PID))
gt2 = gt.uacc_global(psi_n)
for i, _ in enumerate(gt2):
if gt2[i].is_node():
gt2[i] = TaggedValue((gt2.get_left(i).get_value(),
gt2.get_right(i).get_value()),
gt2[i].get_tag())
par.at_root(lambda: logger.debug('[END] PID[%s] uacc_global', PID))
return gt2
def reduce(self, k, phi, psi_n, psi_l, psi_r):
"""Reduce skeleton for distributed tree
The parameters must respect these equalities (closure property):
* k(l, b, r) = psi_n(l, phi(b), r)
* psi_n(psi_n(value, l, y), b, r) = psi_n(value, psi_l(l,b,r), y)
* psi_n(l, b, psi_n(value, r, y)) = psi_n(value, psi_r(l,b,r), y)
Parameters
----------
k : callable
The function used to reduce a BTree into a single value
phi : callable
A function used to respect the closure property to allow partial computation
psi_n : callable
A function used to respect the closure property to make partial computation
psi_l : callable
A function used to respect the closure property to make partial computation on the left
psi_r : callable
A function used to respect the closure property to make partial computation on the right
"""
logger.debug('[START] PID[%s] reduce skeleton', PID)
# Step 1 : Local Reduction
gt = Segment([None] * self.__nb_segs)
i = 0
for (start, offset) in \
self.__global_index[self.__start_index: self.__start_index + self.__nb_segs]:
logger.debug('[START] PID[%s] reduce_local from %s to %s', PID,
start, start + offset)
gt[i] = Segment(self.__content[start:start + offset]).reduce_local(
k, phi, psi_l, psi_r)
logger.debug('[END] PID[%s] reduce_local from %s to %s', PID,
start, start + offset)
i = i + 1
# Step 2 : Gather local Results
self.__gather_local_result(gt, i, TAG_COMM_UACC_1)
# Step 3 : Global Reduction
par.at_root(lambda: logger.debug('[START] PID[%s] reduce_global', PID))
res = gt.reduce_global(psi_n) if PID == 0 else None
par.at_root(lambda: logger.debug('[END] PID[%s] reduce_global', PID))
logger.debug('[END] PID[%s] reduce skeleton', PID)
return res
def _main():
if _PID == 0:
bal = balanced_btree(_rand_str, 15)
ill = ill_balanced_btree(_rand_str, 15)
rdm = random_btree(_rand_str, 15)
for i in range(1, _NPROCS):
_COMM.send({'b': bal, 'i': ill, 'r': rdm}, dest=i, tag=1)
else:
data = _COMM.recv(source=0, tag=1)
bal = data['b']
ill = data['i']
rdm = data['r']
par.barrier()
par.at_root(lambda: print("\nBALANCED\n"))
_test(bal)
par.at_root(lambda: print("\nILL BALANCED\n"))
_test(ill)
par.at_root(lambda: print("\nRANDOM\n"))
_test(rdm)
def _test(bin_tree):
print(bin_tree)
par.at_root(lambda: print("-----"))
m_bridge_param = 3
linear_tree = LTree.init_from_bt(bin_tree, m_bridge_param)
parallel_tree = PTree(linear_tree)
par.at_root(lambda: print(linear_tree))
print(parallel_tree)
par.at_root(lambda: print("-----"))
res = prefix(parallel_tree)
par.at_root(lambda: print("prefix result:"))
print(res)
par.at_root(lambda: print("-----"))
res = size(parallel_tree)
par.at_root(lambda: print("size result:"))
print(res)
par.at_root(lambda: print("-----"))
res = size_by_node(parallel_tree)
par.at_root(lambda: print("size_by_node result:"))
print(res)
par.at_root(lambda: print("-----"))
res = ancestors(parallel_tree)
par.at_root(lambda: print("ancestors result:"))
print(res)
def dacc(self, gl, gr, c, phi_l, phi_r, psi_u, psi_d):
"""Downward accumulation skeleton for distributed tree
The parameters must respect these equalities (closure property):
* gl(c, b) = psi_d(c, phi_l(b))
* gr(c, b) = psi_d(c, phi_r(b))
* psi_d(psi_d(c, b), a) = psi_d(c, psi_u(b,a))
Parameters
---------
gl : callable
The function used to make an accumulation to the left children in a binary tree
gr : callable
The function used to make an accumulation to the right children in a binary tree
c
Initial value of accumulation
phi_l : callable
A function used to respect the closure property to allow partial computation on the left
phi_r : callable
A function used to respect the closure property to allow partial computation on the right
psi_d : callable
A function used to respect the closure property to make partial downward accumulation
psi_u : callable
A function used to respect the closure property to make partial computation
"""
logger.debug(
'[START] PID[' + str(PID) + '] dAcc skeleton')
# Step 1 : Computing Local Intermediate Values
gt = Segment([None] * self.__nb_segs)
i = 0
for (start, offset) in self.__global_index[self.__start_index: self.__start_index + self.__nb_segs]:
seg = Segment(self.__content[start:start + offset])
logger.debug(
'[START] PID[' + str(PID) + '] dacc_path from ' + str(start) + ' to ' + str(start + offset))
if seg.has_critical():
gt[i] = seg.dacc_path(phi_l, phi_r, psi_u)
else:
gt[i] = TaggedValue(seg[0].get_value(), "L")
logger.debug(
'[END] PID[' + str(PID) + '] dacc_path from ' + str(start) + ' to ' + str(start + offset))
i = i + 1
# Step 2 : Gather Local Results
if PID == 0:
for iproc in range(1, NPROCS):
logger.debug(
'[START] PID[' + str(PID) + '] reception update from ' + str(i))
gt.extend(COMM.recv(source=iproc, tag=TAG_COMM_DACC_1)['c'])
logger.debug(
'[END] PID[' + str(PID) + '] reception update from ' + str(i))
else:
logger.debug(
'[START] PID[' + str(PID) + '] emission update to ' + str(0))
COMM.send({'c': gt}, dest=0, tag=TAG_COMM_DACC_1)
logger.debug(
'[END] PID[' + str(PID) + '] emission update to ' + str(0))
# Step 3 : Global Downward Accumulation
par.at_root(lambda: logger.debug('[START] PID[' + str(PID) + '] dacc_global'))
gt2 = (gt.dacc_global(psi_d, c) if PID == 0 else None)
par.at_root(lambda: logger.debug('[END] PID[' + str(PID) + '] dacc_global'))
# Step 4 : Distributing Global Result
if PID == 0:
start = 0
for iproc in range(NPROCS):
iproc_off = self.__distribution[iproc]
if iproc != 0:
logger.debug(
'[START] PID[' + str(PID) + '] emission global to ' + str(iproc))
COMM.send({'g': gt2[start: start + iproc_off]}, dest=iproc, tag=TAG_COMM_DACC_2)
logger.debug(
'[END] PID[' + str(PID) + '] emission global to ' + str(iproc))
start = start + iproc_off
else:
logger.debug(
'[START] PID[' + str(PID) + '] reception global from ' + str(0))
gt2 = COMM.recv(source=0, tag=TAG_COMM_DACC_2)['g']
logger.debug(
'[END] PID[' + str(PID) + '] reception global from ' + str(0))
# Step 5 : Local Downward Accumulation
content = SList([None] * self.__content.length())
for i in range(len(self.__global_index[self.__start_index: self.__start_index + self.__nb_segs])):
(start, offset) = self.__global_index[self.__start_index: self.__start_index + self.__nb_segs][i]
logger.debug(
'[START] PID[' + str(PID) + '] dacc_local from ' + str(start) + ' to ' + str(start + offset))
content[start:start + offset] = \
Segment(self.__content[start:start + offset]).dacc_local(gl, gr, gt2[i].get_value())
logger.debug(
'[END] PID[' + str(PID) + '] dacc_local from ' + str(start) + ' to ' + str(start + offset))
res = PTree.init(self, content)
logger.debug(
'[END] PID[' + str(PID) + '] dAcc skeleton')
return res
def uacc(self, k, phi, psi_n, psi_l, psi_r):
"""Upward accumulation skeleton for distributed tree
The parameters must respect these equalities (closure property):
* k(l, b, r) = psi_n(l, phi(b), r)
* psi_n(psi_n(value, l, y), b, r) = psi_n(value, psi_l(l,b,r), y)
* psi_n(l, b, psi_n(value, r, y)) = psi_n(value, psi_r(l,b,r), y)
Parameters
----------
k : callable
The function used to reduce a BTree into a single value
phi : callable
A function used to respect the closure property to allow partial computation
psi_n : callable
A function used to respect the closure property to make partial computation
psi_l : callable
A function used to respect the closure property to make partial computation on the left
psi_r : callable
A function used to respect the closure property to make partial computation on the right
"""
logger.debug(
'[START] PID[' + str(PID) + '] uAcc skeleton')
assert self.__distribution != []
# Step 1 : Local Upwards Accumulation
gt = Segment([None] * self.__nb_segs)
lt2 = SList([None] * self.__nb_segs)
i = 0
for (start, offset) in self.__global_index[self.__start_index: self.__start_index + self.__nb_segs]:
logger.debug(
'[START] PID[' + str(PID) + '] uacc_local from ' + str(start) + ' to ' + str(start + offset))
(top, res) = Segment(self.__content[start:start + offset]).uacc_local(k, phi, psi_l, psi_r)
logger.debug(
'[END] PID[' + str(PID) + '] uacc_local from ' + str(start) + ' to ' + str(start + offset))
gt[i] = top
lt2[i] = res
i = i + 1
# Step 2 : Gather local Results
if PID == 0:
for iproc in range(1, NPROCS):
logger.debug(
'[START] PID[' + str(PID) + '] reception local from ' + str(i))
gt.extend(COMM.recv(source=iproc, tag=TAG_COMM_UACC_1)['c'])
logger.debug(
'[END] PID[' + str(PID) + '] reception local from ' + str(i))
else:
logger.debug(
'[START] PID[' + str(PID) + '] emission local to ' + str(0))
COMM.send({'c': gt}, dest=0, tag=TAG_COMM_UACC_1)
logger.debug(
'[END] PID[' + str(PID) + '] emission local to ' + str(0))
# Step 3 : Global Upward Accumulation
gt2 = None
if PID == 0:
par.at_root(lambda: logger.debug('[START] PID[' + str(PID) + '] uacc_global'))
gt2 = gt.uacc_global(psi_n)
for i in range(len(gt2)):
if gt2[i].is_node():
gt2[i] = TaggedValue((gt2.get_left(i).get_value(), gt2.get_right(i).get_value()), gt2[i].get_tag())
par.at_root(lambda: logger.debug('[END] PID[' + str(PID) + '] uacc_global'))
# Step 4 : Distributing Global Result
start = 0
if PID == 0:
for iproc in range(NPROCS):
iproc_off = self.__distribution[iproc]
if iproc != 0:
logger.debug(
'[START] PID[' + str(PID) + '] emission global to ' + str(iproc))
COMM.send({'g': gt2[start: start + iproc_off]}, dest=iproc, tag=TAG_COMM_UACC_2)
logger.debug(
'[END] PID[' + str(PID) + '] emission global to ' + str(iproc))
start = start + iproc_off
else:
logger.debug(
'[START] PID[' + str(PID) + '] reception global from ' + str(0))
gt2 = COMM.recv(source=0, tag=TAG_COMM_UACC_2)['g']
logger.debug(
'[END] PID[' + str(PID) + '] reception global from ' + str(0))
# Step 5 : Local Updates
content = SList([None] * self.__content.length())
for i in range(len(self.__global_index[self.__start_index: self.__start_index + self.__nb_segs])):
(start, offset) = self.__global_index[self.__start_index: self.__start_index + self.__nb_segs][i]
logger.debug('[START] PID[' + str(PID) + '] uacc_update from ' + str(start) + ' to ' + str(start + offset))
if gt[i].is_node():
(lc, rc) = gt2[i].get_value()
val = Segment(self.__content[start:start + offset]).uacc_update(lt2[i], k, lc, rc)
else:
val = lt2[i]
logger.debug('[END] PID[' + str(PID) + '] uacc_update from ' + str(start) + ' to ' + str(start + offset))
content[start:start + offset] = val
res = PTree.init(self, content)
logger.debug(
'[END] PID[' + str(PID) + '] uAcc skeleton')
return res
def dacc(self, gl, gr, c, phi_l, phi_r, psi_u, psi_d):
"""Downward accumulation skeleton for distributed tree
The parameters must respect these equalities (closure property):
* gl(c, b) = psi_d(c, phi_l(b))
* gr(c, b) = psi_d(c, phi_r(b))
* psi_d(psi_d(c, b), a) = psi_d(c, psi_u(b,a))
Parameters
---------
gl : callable
The function used to make an accumulation to the left children in a binary tree
gr : callable
The function used to make an accumulation to the right children in a binary tree
c
Initial value of accumulation
phi_l : callable
A function used to respect the closure property to allow partial computation
on the left
phi_r : callable
A function used to respect the closure property to allow partial computation
on the right
psi_d : callable
A function used to respect the closure property to make partial downward accumulation
psi_u : callable
A function used to respect the closure property to make partial computation
"""
logger.debug('[START] PID[%s] dAcc skeleton', PID)
# Step 1 : Computing Local Intermediate Values
gt = Segment([None] * self.__nb_segs)
i = 0
for (start, offset) in \
self.__global_index[self.__start_index: self.__start_index + self.__nb_segs]:
seg = Segment(self.__content[start:start + offset])
logger.debug('[START] PID[%s] dacc_path from %s to %s', PID, start,
start + offset)
if seg.has_critical():
gt[i] = seg.dacc_path(phi_l, phi_r, psi_u)
else:
gt[i] = TaggedValue(seg[0].get_value(), "L")
logger.debug('[END] PID[%s] dacc_path from %s to %s', PID, start,
start + offset)
i = i + 1
# Step 2 : Gather Local Results
self.__gather_local_result(gt, i, TAG_COMM_DACC_1)
# Step 3 : Global Downward Accumulation
par.at_root(lambda: logger.debug('[START] PID[%s] dacc_global', PID))
gt2 = (gt.dacc_global(psi_d, c) if PID == 0 else None)
par.at_root(lambda: logger.debug('[END] PID[%s] dacc_global', PID))
# Step 4 : Distributing Global Result
gt2 = self.__distribute_global_result(gt2, TAG_COMM_DACC_2)
# Step 5 : Local Downward Accumulation
content = SList([None] * self.__content.length())
for i in range(
len(self.__global_index[self.__start_index:self.__start_index +
self.__nb_segs])):
(start, offset
) = self.__global_index[self.__start_index:self.__start_index +
self.__nb_segs][i]
logger.debug('[START] PID[%s] dacc_local from %s to %s', PID,
start, start + offset)
content[start:start + offset] = \
Segment(self.__content[start:start + offset]).dacc_local(gl, gr, gt2[i].get_value())
logger.debug('[END] PID[%s] dacc_local from %s to %s', PID, start,
start + offset)
logger.debug('[END] PID[%s] dAcc skeleton', PID)
return PTree.init(self, content)
