Re: [Cake] Cake on openwrt - falling behind

[Dave Taht <dave.taht@gmail.com>]

Well, I took a look at that cap. It does look like what is supplied is
truncated by quite a few bytes. I am under the impression that
openwrt/lede use a mini library for libmnl (what does tc link to?)
that may well be the source of this bug.

One thing that might help in peering at the raw data this way would be
to send const patterns
for each value like F0F0F0F0F0F0 alternating with E0E0E0E0E0... (full
pattern for 32 bit or 64 bit) to see what shows up.
On Sun, Jul 1, 2018 at 12:41 PM Kevin Darbyshire-Bryant via Cake
<cake@lists.bufferbloat.net> wrote:
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> ---------- Forwarded message ----------
> From: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
> To: Pete Heist <pete@heistp.net>
> Cc: Cake List <cake@lists.bufferbloat.net>
> Bcc:
> Date: Sun, 1 Jul 2018 19:41:28 +0000
> Subject: Re: [Cake]  Cake on openwrt - falling behind
>
>
> > On 1 Jul 2018, at 17:54, Pete Heist <pete@heistp.net> wrote:
> >
> >
> >
> >> There’s a ‘kmon-nlmon’ that allows you to create a virtual network interface for the netlink packets and thus capture (tcpdump) and export to wireshark for dissection.  I had a look at that a few weeks ago but my head exploded and have only just recovered enough to start looking at this problem again….
> >
> > Cool, I might eventually get to that point. My head also approached some thermal limits last night with this unfamiliar build system but it’s getting a little better… :)
>
> For those who fancy dissecting some netlink packets, see attached :-)
>
>
>
>
>
> ---------- Forwarded message ----------
> From: Kevin Darbyshire-Bryant via Cake <cake@lists.bufferbloat.net>
> To: Pete Heist <pete@heistp.net>
> Cc: Cake List <cake@lists.bufferbloat.net>
> Bcc:
> Date: Sun, 01 Jul 2018 12:41:33 -0700 (PDT)
> Subject: Re: [Cake] Cake on openwrt - falling behind
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-- 

Dave Täht
CEO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-669-226-2619