def add_successors(queue,
all_elements,
node_points,
ground_nodes,
heuristic_fn,
printed,
position,
conf,
partial_orders=[],
visualize=False):
incoming_from_element = incoming_from_edges(partial_orders)
remaining = all_elements - printed
num_remaining = len(remaining) - 1
#assert 0 <= num_remaining
#bias_from_element = {}
# TODO: print ground first
for directed in randomize(
compute_printable_directed(all_elements, ground_nodes, printed)):
element = get_undirected(all_elements, directed)
if not (incoming_from_element[element] <= printed):
continue
bias = heuristic_fn(printed, directed, position, conf)
priority = (num_remaining, bias, random.random())
visits = 0
heapq.heappush(queue, (visits, priority, printed, directed, conf))
def current_failure_contributors(binding):
# Alternatively, find unsuccessful streams in cluster and add ancestors
assert (1 <= binding.visits) or binding.is_dominated()
failed_result = binding.skeleton.stream_plan[binding.index]
failed_indices = compute_failed_indices(
binding.skeleton) # Use last index?
partial_orders = get_partial_orders(binding.skeleton.stream_plan)
incoming = incoming_from_edges(partial_orders)
failed_ancestors = grow_component([failed_result], incoming)
for index in reversed(failed_indices):
if index == binding.index:
continue
result = binding.skeleton.stream_plan[index]
ancestors = grow_component([result], incoming)
if ancestors & failed_ancestors:
failed_ancestors.update(ancestors)
return [failed_ancestors]
def __init__(self, queue, stream_plan, action_plan, cost):
# TODO: estimate statistics per stream_instance online and use to reorder the skeleton
self.queue = queue
self.index = len(self.queue.skeletons)
self.stream_plan = stream_plan
self.action_plan = action_plan
self.cost = cost
self.best_binding = None
self.improved = False
self.root = Binding(self, self.cost, history=[], mapping={}, index=0, parent=None, parent_result=None)
self.affected_indices = [compute_affected_downstream(self.stream_plan, index)
for index in range(len(self.stream_plan))]
stream_orders = get_partial_orders(self.stream_plan) # init_facts=self.queue.evaluations)
index_from_result = get_mapping(stream_plan, range(len(stream_plan)))
index_orders = {(index_from_result[r1], index_from_result[r2]) for r1, r2 in stream_orders}
preimage = stream_plan_preimage(stream_plan)
self.preimage_complexities = [[queue.evaluations[evaluation_from_fact(fact)].complexity
for fact in stream.get_domain() if fact in preimage] for stream in stream_plan]
self.incoming_indices = incoming_from_edges(index_orders)
self.outgoing_indices = outgoing_from_edges(index_orders)
