[Noisebridge-discuss] Packet loss at Noisebridge

Nick mischief at offblast.org
Tue May 8 22:03:54 PDT 2012


Do we have TCP ACK prioritization? Would it be feasible to implement it?

On Tue, May 8, 2012 at 3:34 PM, Jonathan Lassoff <jof at thejof.com> wrote:

> There has been a fair bit of upstream earlier, but nothing too crazy. It's
> hard to tell where we congest without visibility into Monkeybrains'
> hardware.
>
>
>
>
> On Tue, May 8, 2012 at 3:29 PM, Jonathan Lassoff <jof at thejof.com> wrote:
> > On Tue, May 8, 2012 at 3:26 PM, William Sargent <will.sargent at gmail.com>
> wrote:
> >> I'm getting some really odd lag from the Noisebridge network:
> >>
> >> [15:19:42] wsargent:~ $ ping google.com
> >> PING google.com (74.125.224.40): 56 data bytes
> >> 64 bytes from 74.125.224.40: icmp_seq=0 ttl=56 time=388.703 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=1 ttl=56 time=516.701 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=2 ttl=56 time=895.076 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=3 ttl=56 time=781.850 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=4 ttl=56 time=501.712 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=5 ttl=56 time=196.522 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=6 ttl=56 time=774.152 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=7 ttl=56 time=455.544 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=8 ttl=56 time=121.375 ms
> >> 64 bytes from 74.125.224.40: icmp_seq=9 ttl=56 time=97.818 ms
> >>
> >> Is this something new, or this happens all the time when someone is
> downloading porn / torrents over the wifi?
> >
> > It depends.
> >
> > Since we switched over to the Vyatta box, we're no longer doing any
> > prioritization or controlled queueing of traffic. So, it could be that
> > someone is pushing heavy upstream and is causing collateral damage to
> > other TCP ACKs, for example.
> >
> > It could also be that the WiFi is too congested. Try out the
> > "noisebridge-a" network if you have a suitable adapter, or try
> > plugging into a wired port.
> >
> > Cheers,
> > jof
>
>
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>
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