Re: [Bloat] passive network delay monitoring utility

[Eric Dumazet <eric.dumazet@gmail.com>]

I had the honor to attend Kathleen presentation at Google ;)

I then worked on making sure TCP TS TSval  would use 1ms units,
regardless of CONFIG_HZ option in the kernel, since apparently some
distros/devices use HZ=250 or even HZ=100

This should be in linux-4.13 when released.

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=9a568de4818dea9a05af141046bd3e589245ab83

Cover letter for the patch series :

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=e26925ec03b31f5ae4c1fc544515486229334ef9


On Tue, 2017-05-23 at 15:22 -0400, Jim Gettys wrote:
> Those of you who have not looked at pping should do so.
> 
> 
> See: http://pollere.net/pping.html for a description, and look at the
> slides linked to on that page.
> 
> 
> In particular, it would be sweet to run this on a home router, as you
> can monitor latency simultaneously in either direction.  Then we can
> point a finger properly at the ISP or at the WiFi in the home network
> (encouraging either/both to get fixed).
> 
> 
> Anyone interested in undertaking such a project with me, please drop
> me a note.
> 
> 
> The only downside is that pping is a C++ app, which makes it big for a
> home router, so it can't be used on old small home routers due to
> footprint issues; but many current home routers would have space for
> it.
> 
> 
>                                                  - Jim
> 
> 
> 
> 
> 
> 
> 
> On Sun, Apr 30, 2017 at 8:41 PM, Kathleen Nichols
> <nichols@pollere.com> wrote:
>         
>         Hi,
>         I've just made one of the tools I use to measure network delay
>         available with a GPLv2 license. Perhaps it will be of
>         intererst.
>         
>         https://github.com/pollere/pping
>         
>                 Kathie
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> 
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