Il giorno 27/apr/2015, alle ore 11:57, Toke Høiland-Jørgensen <[email protected]> ha scritto:
> Paolo Valente <[email protected]> writes: > >> a network-monitoring company got curious about bufferbloat issues and >> asked me to investigate a little bit the following issue (quite >> interesting in my opinion). Is it possible to detect, from outside a >> node, if the node is bufferbloated? In particular, the only action >> allowed would be to observe the packets entering and leaving the node >> (plus, of course, their timing). > > Sure. Just measure the timing when the network is unloaded and compare > it to when it is loaded to capacity. We do that all the time. > > The details of course depend on what you define by a 'node', what role > it plays in the network (does it forward or originate packets?), and > what control you have over the traffic flowing through it. :) > Let us consider, for example, a host with a VoIP call and a large-file transfer in progress. My concern is: from inside the host, we can measure the delays experienced by the VoIP application, but, form outside, how can we detect that the application is experiencing a high latency, or, indirectly, that there is bufferbloat and hence that the application is likely to be experiencing a high latency? (Of course, I am also about to read the documents suggested by Neil.) Thanks, Paolo > -Toke -- Paolo Valente Algogroup Dipartimento di Fisica, Informatica e Matematica Via Campi, 213/B 41125 Modena - Italy homepage: http://algogroup.unimore.it/people/paolo/ _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
