Hi Iwase
Thank you for the really prompt reply. I will test your patch out with my
project.
Will this patch make it into the main Ryu distribution at some stage?
Thanks,
Matt.
________________________________
From: Iwase Yusuke <iwase.yusu...@gmail.com>
Sent: Tuesday, 11 July 2017 12:31 a.m.
To: matthew_john_ha...@hotmail.com
Cc: ryu-devel@lists.sourceforge.net
Subject: Re: [Ryu-devel] Event receive timestamps
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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