mirror of
https://github.com/markqvist/Reticulum.git
synced 2024-11-26 15:30:18 +00:00
Improved Channel sequencing, retries and transfer efficiency
This commit is contained in:
Mark Qvist
parent
481062fca1
commit
8c8affc800
@ -234,13 +234,16 @@ class Channel(contextlib.AbstractContextManager):
|
||||
WINDOW = 2
|
||||
|
||||
# Absolute minimum window size
|
||||
WINDOW_MIN = 1
|
||||
WINDOW_MIN = 2
|
||||
WINDOW_MIN_LIMIT_SLOW = 2
|
||||
WINDOW_MIN_LIMIT_MEDIUM = 5
|
||||
WINDOW_MIN_LIMIT_FAST = 16
|
||||
|
||||
# The maximum window size for transfers on slow links
|
||||
WINDOW_MAX_SLOW = 5
|
||||
|
||||
# The maximum window size for transfers on mid-speed links
|
||||
WINDOW_MAX_MEDIUM = 16
|
||||
WINDOW_MAX_MEDIUM = 12
|
||||
|
||||
# The maximum window size for transfers on fast links
|
||||
WINDOW_MAX_FAST = 48
|
||||
@ -255,7 +258,7 @@ class Channel(contextlib.AbstractContextManager):
|
||||
|
||||
# If the RTT rate is higher than this value,
|
||||
# the max window size for fast links will be used.
|
||||
RTT_FAST = 0.25
|
||||
RTT_FAST = 0.18
|
||||
RTT_MEDIUM = 0.75
|
||||
RTT_SLOW = 1.45
|
||||
|
||||
@ -385,9 +388,8 @@ class Channel(contextlib.AbstractContextManager):
|
||||
RNS.log(f"Envelope: Emplacement of duplicate envelope with sequence "+str(envelope.sequence), RNS.LOG_EXTREME)
|
||||
return False
|
||||
|
||||
if envelope.sequence < existing.sequence and not envelope.sequence < window_overflow:
|
||||
if envelope.sequence < existing.sequence and not (self._next_rx_sequence - envelope.sequence) > (Channel.SEQ_MAX//2):
|
||||
ring.insert(i, envelope)
|
||||
RNS.log("Inserted seq "+str(envelope.sequence)+" at "+str(i), RNS.LOG_DEBUG)
|
||||
|
||||
envelope.tracked = True
|
||||
return True
|
||||
@ -396,6 +398,7 @@ class Channel(contextlib.AbstractContextManager):
|
||||
|
||||
envelope.tracked = True
|
||||
ring.append(envelope)
|
||||
|
||||
return True
|
||||
|
||||
def _run_callbacks(self, message: MessageBase):
|
||||
@ -429,13 +432,18 @@ class Channel(contextlib.AbstractContextManager):
|
||||
if not is_new:
|
||||
RNS.log("Duplicate message received on channel "+str(self), RNS.LOG_EXTREME)
|
||||
return
|
||||
else:
|
||||
else:
|
||||
with self._lock:
|
||||
contigous = []
|
||||
for e in self._rx_ring:
|
||||
if e.sequence == self._next_rx_sequence:
|
||||
contigous.append(e)
|
||||
self._next_rx_sequence = (self._next_rx_sequence + 1) % Channel.SEQ_MODULUS
|
||||
if self._next_rx_sequence == 0:
|
||||
for e in self._rx_ring:
|
||||
if e.sequence == self._next_rx_sequence:
|
||||
contigous.append(e)
|
||||
self._next_rx_sequence = (self._next_rx_sequence + 1) % Channel.SEQ_MODULUS
|
||||
|
||||
for e in contigous:
|
||||
if not e.unpacked:
|
||||
@ -474,6 +482,7 @@ class Channel(contextlib.AbstractContextManager):
|
||||
with self._lock:
|
||||
envelope = next(filter(lambda e: self._outlet.get_packet_id(e.packet) == self._outlet.get_packet_id(packet),
|
||||
self._tx_ring), None)
|
||||
|
||||
if envelope and op(envelope):
|
||||
envelope.tracked = False
|
||||
if envelope in self._tx_ring:
|
||||
@ -481,11 +490,9 @@ class Channel(contextlib.AbstractContextManager):
|
||||
|
||||
if self.window < self.window_max:
|
||||
self.window += 1
|
||||
if (self.window - self.window_min) > (self.window_flexibility-1):
|
||||
self.window_min += 1
|
||||
|
||||
# TODO: Remove at some point
|
||||
# RNS.log("Increased "+str(self)+" window to "+str(self.window), RNS.LOG_EXTREME)
|
||||
# RNS.log("Increased "+str(self)+" window to "+str(self.window), RNS.LOG_DEBUG)
|
||||
|
||||
if self._outlet.rtt != 0:
|
||||
if self._outlet.rtt > Channel.RTT_FAST:
|
||||
@ -498,15 +505,20 @@ class Channel(contextlib.AbstractContextManager):
|
||||
self.medium_rate_rounds += 1
|
||||
if self.window_max < Channel.WINDOW_MAX_MEDIUM and self.medium_rate_rounds == Channel.FAST_RATE_THRESHOLD:
|
||||
self.window_max = Channel.WINDOW_MAX_MEDIUM
|
||||
self.window_min = Channel.WINDOW_MIN_LIMIT_MEDIUM
|
||||
# TODO: Remove at some point
|
||||
# RNS.log("Increased "+str(self)+" max window to "+str(self.window_max), RNS.LOG_EXTREME)
|
||||
# RNS.log("Increased "+str(self)+" max window to "+str(self.window_max), RNS.LOG_DEBUG)
|
||||
# RNS.log("Increased "+str(self)+" min window to "+str(self.window_min), RNS.LOG_DEBUG)
|
||||
|
||||
else:
|
||||
self.fast_rate_rounds += 1
|
||||
if self.window_max < Channel.WINDOW_MAX_FAST and self.fast_rate_rounds == Channel.FAST_RATE_THRESHOLD:
|
||||
self.window_max = Channel.WINDOW_MAX_FAST
|
||||
self.window_max = Channel.WINDOW_MAX_FAST
|
||||
self.window_min = Channel.WINDOW_MIN_LIMIT_FAST
|
||||
# TODO: Remove at some point
|
||||
# RNS.log("Increased "+str(self)+" max window to "+str(self.window_max), RNS.LOG_EXTREME)
|
||||
# RNS.log("Increased "+str(self)+" max window to "+str(self.window_max), RNS.LOG_DEBUG)
|
||||
# RNS.log("Increased "+str(self)+" min window to "+str(self.window_min), RNS.LOG_DEBUG)
|
||||
|
||||
|
||||
else:
|
||||
RNS.log("Envelope not found in TX ring for "+str(self), RNS.LOG_EXTREME)
|
||||
@ -516,8 +528,15 @@ class Channel(contextlib.AbstractContextManager):
|
||||
def _packet_delivered(self, packet: TPacket):
|
||||
self._packet_tx_op(packet, lambda env: True)
|
||||
|
||||
def _update_packet_timeouts(self):
|
||||
for envelope in self._tx_ring:
|
||||
updated_timeout = self._get_packet_timeout_time(envelope.tries)
|
||||
if updated_timeout > envelope.packet.receipt.timeout:
|
||||
envelope.packet.receipt.set_timeout(updated_timeout)
|
||||
|
||||
def _get_packet_timeout_time(self, tries: int) -> float:
|
||||
return pow(2, tries - 1) * max(self._outlet.rtt, 0.01) * 5
|
||||
to = pow(1.5, tries - 1) * max(self._outlet.rtt*2.5, 0.025) * (len(self._tx_ring)+1.5)
|
||||
return to
|
||||
|
||||
def _packet_timeout(self, packet: TPacket):
|
||||
def retry_envelope(envelope: Envelope) -> bool:
|
||||
@ -526,17 +545,22 @@ class Channel(contextlib.AbstractContextManager):
|
||||
self._shutdown() # start on separate thread?
|
||||
self._outlet.timed_out()
|
||||
return True
|
||||
|
||||
envelope.tries += 1
|
||||
self._outlet.resend(envelope.packet)
|
||||
self._outlet.set_packet_delivered_callback(envelope.packet, self._packet_delivered)
|
||||
self._outlet.set_packet_timeout_callback(envelope.packet, self._packet_timeout, self._get_packet_timeout_time(envelope.tries))
|
||||
self._update_packet_timeouts()
|
||||
|
||||
if self.window > self.window_min:
|
||||
self.window -= 1
|
||||
if self.window_max > self.window_min:
|
||||
# TODO: Remove at some point
|
||||
# RNS.log("Decreased "+str(self)+" window to "+str(self.window), RNS.LOG_DEBUG)
|
||||
|
||||
if self.window_max > (self.window_min+self.window_flexibility):
|
||||
self.window_max -= 1
|
||||
if (self.window_max - self.window) > (self.window_flexibility-1):
|
||||
self.window_max -= 1
|
||||
# TODO: Remove at some point
|
||||
# RNS.log("Decreased "+str(self)+" max window to "+str(self.window_max), RNS.LOG_DEBUG)
|
||||
|
||||
# TODO: Remove at some point
|
||||
# RNS.log("Decreased "+str(self)+" window to "+str(self.window), RNS.LOG_EXTREME)
|
||||
@ -573,6 +597,7 @@ class Channel(contextlib.AbstractContextManager):
|
||||
envelope.tries += 1
|
||||
self._outlet.set_packet_delivered_callback(envelope.packet, self._packet_delivered)
|
||||
self._outlet.set_packet_timeout_callback(envelope.packet, self._packet_timeout, self._get_packet_timeout_time(envelope.tries))
|
||||
self._update_packet_timeouts()
|
||||
|
||||
return envelope
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user