Source code for spinn_front_end_common.utilities.report_functions.router_collision_potential_report
# Copyright (c) 2019 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
from collections import defaultdict
from spinn_machine.router import Router
from spinn_front_end_common.data import FecDataView
COLLISION_REPORT = "routing_collision_protential_report.rpt"
[docs]def router_collision_potential_report():
file_name = os.path.join(
FecDataView.get_run_dir_path(),
"routing_collision_protential_report.rpt")
with open(file_name, "w", encoding="utf-8") as writer:
collision_counts = _generate_data()
_write_report(collision_counts, writer)
def _write_report(collision_counts, writer):
if len(collision_counts) == 0:
writer.write("There are no collisions in this network mapping")
return
for (x, y) in collision_counts:
for link_id in collision_counts[(x, y)]:
writer.write(
f"router {x}:{y} link {link_id} has potential "
f"{collision_counts[(x, y)][link_id]} collisions\n")
def _generate_data():
router_tables_by_partition = FecDataView.get_routing_table_by_partition()
collisions = defaultdict(lambda: defaultdict(int))
n_keys_map = dict()
# https://github.com/SpiNNakerManchester/SpiNNFrontEndCommon/issues/891
# use machine_vertex.get_n_keys_for_partition(identifier)
for (x, y) in router_tables_by_partition.get_routers():
for partition in \
router_tables_by_partition.get_entries_for_router(x, y):
entry = router_tables_by_partition.get_entry_on_coords_for_edge(
partition, x, y)
for link in entry.link_ids:
if collisions[(x, y)][link] == 0:
chip = FecDataView.get_chip_at(x, y)
other_chip_x = chip.router.get_link(link).destination_x
other_chip_y = chip.router.get_link(link).destination_y
collision_route = Router.opposite(link)
collision_potential = _get_collisions_with_other_router(
other_chip_x, other_chip_y, collision_route,
router_tables_by_partition, n_keys_map)
collisions[(x, y)][link] = collision_potential
n_packets = 0 # n_keys_map.n_keys_for_partition(partition)
collisions[(x, y)][link] += n_packets
return collisions
def _get_collisions_with_other_router(
x, y, collision_route, router_tables_by_partition, n_key_map):
total = 0
for partition in router_tables_by_partition.get_entries_for_router(x, y):
entry = router_tables_by_partition.get_entry_on_coords_for_edge(
partition, x, y)
if collision_route in entry.link_ids:
total += n_key_map.n_keys_for_partition(partition)
return total