# 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.
from spinnman.messages.eieio import EIEIOType, EIEIOPrefix
from spinn_front_end_common.utilities.exceptions import ConfigurationException
from pacman.model.resources.iptag_resource import IPtagResource
_HAS_PAYLOAD = (EIEIOType.KEY_PAYLOAD_32_BIT, EIEIOType.KEY_PAYLOAD_16_BIT)
_NO_PAYLOAD = (EIEIOType.KEY_32_BIT, EIEIOType.KEY_16_BIT)
#: Used to identify tags involved with the live packet gatherer.
TRAFFIC_IDENTIFIER = "LPG_EVENT_STREAM"
[docs]class LivePacketGatherParameters(object):
"""
Parameter holder for :py:class:`LivePacketGather`\\ers so that they can be
instantiated at a later date.
"""
__slots__ = [
'_port', '_hostname', "_tag", "_strip_sdp", "_use_prefix",
"_key_prefix", "_prefix_type", "_message_type", "_right_shift",
"_payload_as_time_stamps", "_use_payload_prefix", "_payload_prefix",
"_payload_right_shift", "_n_packets_per_time_step", "_label",
"_received_key_mask", "_translate_keys", "_translated_key_right_shift"
]
def __init__(
self, port=None, hostname=None, tag=None, strip_sdp=True,
use_prefix=False, key_prefix=None, prefix_type=None,
message_type=EIEIOType.KEY_32_BIT, right_shift=0,
payload_as_time_stamps=True, use_payload_prefix=True,
payload_prefix=None, payload_right_shift=0,
number_of_packets_sent_per_time_step=0, label=None,
received_key_mask=0xFFFFFFFF,
translate_keys=False, translated_key_right_shift=0):
"""
:raises ConfigurationException:
If the parameters passed are known to be an invalid combination.
"""
# pylint: disable=too-many-arguments
# Sanity checks
if (message_type in _HAS_PAYLOAD and use_payload_prefix and
payload_as_time_stamps):
raise ConfigurationException(
"Timestamp can either be included as payload prefix or as "
"payload to each key, not both")
if (message_type in _NO_PAYLOAD and not use_payload_prefix and
payload_as_time_stamps):
raise ConfigurationException(
"Timestamp can either be included as payload prefix or as "
"payload to each key, but current configuration does not "
"specify either of these")
if (prefix_type is not None and
not isinstance(prefix_type, EIEIOPrefix)):
raise ConfigurationException(
"the type of a prefix type should be of a EIEIOPrefix, "
"which can be located in: spinnman.messages.eieio")
self._port = port
self._hostname = hostname
self._tag = tag
self._strip_sdp = strip_sdp
self._use_prefix = use_prefix
self._key_prefix = key_prefix
self._prefix_type = prefix_type
self._message_type = message_type
self._right_shift = right_shift
self._payload_as_time_stamps = payload_as_time_stamps
self._use_payload_prefix = use_payload_prefix
self._payload_prefix = payload_prefix
self._payload_right_shift = payload_right_shift
self._n_packets_per_time_step = number_of_packets_sent_per_time_step
self._label = label
self._received_key_mask = received_key_mask
self._translate_keys = translate_keys
self._translated_key_right_shift = translated_key_right_shift
@property
def port(self):
"""
Where to send data from SpiNNaker:
the port of the listening UDP socket.
:rtype: int
"""
return self._port
@property
def hostname(self):
"""
Where to send data from SpiNNaker: the host name of the listening UDP
socket.
:rtype: bool
"""
return self._hostname
@property
def tag(self):
"""
A fixed tag ID to assign, or `None` if any tag is OK
:rtype: int or None
"""
return self._tag
@property
def strip_sdp(self):
"""
Whether to remove SDP headers from the messages before sending.
:rtype: bool
"""
return self._strip_sdp
@property
def use_prefix(self):
"""
Whether to use EIEIO prefix compaction on keys.
:rtype: bool
"""
return self._use_prefix
@property
def key_prefix(self):
"""
The EIEIO key prefix to remove from messages.
:rtype: int
"""
return self._key_prefix
@property
def prefix_type(self):
"""
The type of prefix.
:rtype: ~spinnman.messages.eieio.EIEIOPrefix
"""
return self._prefix_type
@property
def message_type(self):
"""
The type of messages to send.
:rtype: ~spinnman.messages.eieio.EIEIOType
"""
return self._message_type
@property
def right_shift(self):
"""
Shift to apply to keys.
:rtype: int
"""
return self._right_shift
@property
def payload_as_time_stamps(self):
"""
Whether the payloads are timestamps.
:rtype: bool
"""
return self._payload_as_time_stamps
@property
def use_payload_prefix(self):
"""
Whether to use prefix compaction for payloads.
:rtype: bool
"""
return self._use_payload_prefix
@property
def payload_prefix(self):
"""
The payload prefix to remove if applying compaction.
:rtype: int
"""
return self._payload_prefix
@property
def payload_right_shift(self):
"""
Shift to apply to payloads.
:rtype: int
"""
return self._payload_right_shift
@property
def number_of_packets_sent_per_time_step(self):
"""
The maximum number of packets to send in a timestep.
:rtype: int
"""
return self._n_packets_per_time_step
@property
def label(self):
"""
A label.
:rtype: str
"""
return self._label
@property
def received_key_mask(self):
"""
A mask to select which keys are dispatched.
:rtype: int
"""
return self._received_key_mask
@property
def translate_keys(self):
"""
Whether to apply translation to keys.
:rtype: bool
"""
return self._translate_keys
@property
def translated_key_right_shift(self):
"""
Shift to apply in key translation.
:rtype: int
"""
return self._translated_key_right_shift
[docs] def get_iptag_resource(self):
"""
Get a description of the IPtag that the LPG for these parameters
will require.
:rtype: ~pacman.model.resources.IPtagResource
"""
return IPtagResource(
ip_address=self.hostname, port=self.port,
strip_sdp=self.strip_sdp, tag=self.tag,
traffic_identifier=TRAFFIC_IDENTIFIER)
def __eq__(self, other):
return (self._port == other.port and
self._hostname == other.hostname and
self._tag == other.tag and
self._strip_sdp == other.strip_sdp and
self._use_prefix == other.use_prefix and
self._key_prefix == other.key_prefix and
self._prefix_type == other.prefix_type and
self._message_type == other.message_type and
self._right_shift == other.right_shift and
self._payload_as_time_stamps ==
other.payload_as_time_stamps and
self._use_payload_prefix == other.use_payload_prefix and
self._payload_prefix == other.payload_prefix and
self._payload_right_shift == other.payload_right_shift and
self._n_packets_per_time_step ==
other.number_of_packets_sent_per_time_step and
self._label == other.label and
self._received_key_mask == other.received_key_mask and
self._translate_keys == other.translate_keys and
self._translated_key_right_shift ==
other.translated_key_right_shift)
def __ne__(self, other):
return not self.__eq__(other)
def __hash__(self):
data = (
self._port, self._tag, self._strip_sdp, self._use_prefix,
self._key_prefix, self._prefix_type, self._message_type,
self._right_shift, self._payload_as_time_stamps,
self._use_payload_prefix, self._payload_prefix,
self._payload_right_shift, self._n_packets_per_time_step,
self._label, self._received_key_mask, self._translate_keys,
self._translated_key_right_shift)
return hash(data)