[Flent-users] [tohojo/flent] packet loss stats (#106)
notifications at github.com
Thu Nov 16 14:36:30 EET 2017
> On Nov 16, 2017, at 1:15 PM, Toke Høiland-Jørgensen <notifications at github.com> wrote:
> Meh, irtt's functionality is basically a superset of netperf's UDP_RR.
> So automatically picking irtt if available and a fallback is the right
> thing to do, I think. I'd just add the plots everywhere, and if OWD data
> is not available, those plots would just be empty. Same thing we do for
> TCP window stats currently. Longer term, maybe hiding the plots entirely
> when there is no data is better, but for now empty plots are fine.
I see, that does keep it simpler.
> > Personally I don't think it's necessary to check for server-side
> > support. If someone is specifying they want to use a particular tool,
> > I think they're declaring that it's available, as it is today with
> > netperf / netserver.
> Yes, but if we do automatic detection with a preference we could get
> into the situation where irtt exists on the client but the test is being
> run against a server that doesn't have it. This is especially likely to
> happen before the *.netperf.bufferbloat.net servers have irtt deployed.
> Could you be persuaded to add a 'check_server' action to irtt? Something
> that just does the handshake and doesn't run any more tests other than
> that. Then we could have Flent call that to verify that irtt is
Sure, I’ll add that (or something similarly named). Should get to it today or tomorrow. Meanwhile you’re right that something like this works and check for return code 0 to mean success:
irtt client -i 1ms -d 1ms -wait 1ms a.b.c.d
The handshake takes up to 15 seconds to complete (delays of 1, 2, 4 and 8 seconds waiting for a reply), so not having irtt on the server will mean a 15 second wait. Do you think it’s ok to keep that fixed?
You are receiving this because you commented.
Reply to this email directly or view it on GitHub:
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Flent-users