Source code for spinn_front_end_common.abstract_models.impl.machine_allocation_controller
# Copyright (c) 2017 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 logging
import sys
from threading import Thread
from spinn_utilities.log import FormatAdapter
from spinn_utilities.overrides import overrides
from spinn_utilities.abstract_base import AbstractBase, abstractmethod
from spinnman.constants import SCP_SCAMP_PORT
from spinnman.connections.udp_packet_connections import SCAMPConnection
from spinnman.transceiver import create_transceiver_from_hostname
from spinn_front_end_common.abstract_models import (
AbstractMachineAllocationController)
from spinnman.connections.udp_packet_connections import EIEIOConnection
logger = FormatAdapter(logging.getLogger(__name__))
[docs]class MachineAllocationController(
AbstractMachineAllocationController, metaclass=AbstractBase):
"""
How to manage the allocation of a machine so that it gets cleaned up
neatly when the script dies.
"""
__slots__ = [
#: boolean flag for telling this thread when the system has ended
"_exited",
#: the address of the root board of the allocation
"__hostname",
"__connection_data"
]
def __init__(self, thread_name, hostname=None, connection_data=None):
"""
:param str thread_name:
"""
thread = Thread(name=thread_name, target=self.__manage_allocation)
thread.daemon = True
self._exited = False
self.__hostname = hostname
self.__connection_data = connection_data
thread.start()
[docs] @overrides(AbstractMachineAllocationController.close)
def close(self):
self._exited = True
@abstractmethod
def _wait(self):
"""
Wait for some bounded amount of time for a change in the status
of the machine allocation.
:return: Whether the machine is still (believed to be) allocated.
:rtype: bool
"""
def _teardown(self):
"""
Perform any extra teardown that the thread requires. Does not
need to be overridden if no action is desired.
"""
def __manage_allocation(self):
machine_still_allocated = True
while machine_still_allocated and not self._exited:
machine_still_allocated = self._wait()
self._teardown()
if not self._exited:
logger.error(
"The allocated machine has been released before the end of"
" the script; this script will now exit")
sys.exit(1)
[docs] @overrides(AbstractMachineAllocationController.create_transceiver)
def create_transceiver(self):
if not self.__hostname:
return None
txrx = create_transceiver_from_hostname(
hostname=self.__hostname,
bmp_connection_data=None,
version=5, auto_detect_bmp=False)
txrx.ensure_board_is_ready()
txrx.discover_scamp_connections()
return txrx
[docs] @overrides(AbstractMachineAllocationController.open_sdp_connection)
def open_sdp_connection(self, chip_x, chip_y, udp_port=SCP_SCAMP_PORT):
if not self.__connection_data:
return None
host = self.__connection_data[chip_x, chip_y]
if not host:
return None
return SCAMPConnection(
chip_x=chip_x, chip_y=chip_y,
remote_host=host, remote_port=udp_port)
[docs] @overrides(AbstractMachineAllocationController.open_eieio_connection)
def open_eieio_connection(self, chip_x, chip_y):
if not self.__connection_data:
return None
host = self.__connection_data[chip_x, chip_y]
if not host:
return None
return EIEIOConnection(remote_host=host, remote_port=SCP_SCAMP_PORT)
[docs] @overrides(AbstractMachineAllocationController.open_eieio_listener)
def open_eieio_listener(self):
return EIEIOConnection()