Hi Matt,
Ryu handles the low level messages receiving at ryu/controller/controller.py, I
guess we need to
get the timestamp here.
https://github.com/osrg/ryu/blob/master/ryu/controller/controller.py#L233
Then, how about the following?
I added the "timestamp" into "EventOFP***" events.
$ git diff
diff --git a/ryu/controller/controller.py b/ryu/controller/controller.py
index 62bca5f..4c7259c 100644
--- a/ryu/controller/controller.py
+++ b/ryu/controller/controller.py
@@ -22,6 +22,7 @@ The main component of OpenFlow controller.
"""
+import time
import contextlib
from ryu import cfg
import logging
@@ -266,11 +267,13 @@ class Datapath(ofproto_protocol.ProtocolDesc):
remaining_read_len = (msg_len - buf_len)
break
+ _received_time = time.time()
msg = ofproto_parser.msg(
self, version, msg_type, msg_len, xid, buf[:msg_len])
# LOG.debug('queue msg %s cls %s', msg, msg.__class__)
if msg:
ev = ofp_event.ofp_msg_to_ev(msg)
+ ev.timestamp = _received_time
self.ofp_brick.send_event_to_observers(ev, self.state)
dispatchers = lambda x: x.callers[ev.__class__].dispatchers
Thanks,
Iwase
On 2017年07月10日 19:34, Matthew Hayes wrote:
Hi all,
Can Ryu present timestamps to applications detailing when it received particular OpenFlow events
(example: timestamp for when a Packet-In event was received by Ryu)?
I have a reactive SDN project built on Ryu (see: https://nmeta.readthedocs.io ), and telemetry built
into the app records processing time for OpenFlow events, such as Packet-In.
I want to be able to access to the timestamp of when the OpenFlow event is received by the
controller, to enable tracking of the delay in the application receiving the event, which will vary
under load. This feature would also help with accuracy of algorithms that analyse packet arrival times.
Please advise if this data is available in Ryu, and if not, whether it would be
possible to develop it?
Thanks,
Matt.
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