[Bloat] I am unable to pinpoint the source of bufferbloat

[Dave Taht]

It's in your cablemodem.

Put a rate limiter between your cablemodem and the universe and you'll be
able to see it, and control it)

(in my case that's cerowrt's simple_qos script, but most of that's in
openwrt now)

On Sat, Feb 9, 2013 at 1:52 AM, Forums1000 <forums1000 at gmail.com> wrote:

> Hi everyone,
>
> Can anyone give some tips on how to diagnose the sources of bufferbloat?
> According to the Netalyzr test at http://netalyzr.icsi.berkeley.edu/, I
> have 550ms of upload bufferbloat. I tried all kinds of stuff on my Windows
> 7 laptop:
>
> - For the Intel(R) 82567LF Gigabit Network Connection, I put receive and
> transmit buffers to the lowest value of 80 (80 bytes? 80 packets? I don't
> know). I also disabled interrupt moderation.
> Result? Still 550ms.
> - Then I connected my laptop directly to my cable modem, bypassing my
> Mikrotik 450G router. Result? Still 550ms of bufferbloat.
> - Then I put a 100 megabit switch between the cable modem an the laptop
> (as both cable modem and Intel NIC are gigabit). Result? Still 550ms of
> upload bufferbloat.
>
> I'm out of ideas now. It seems I can't do anything at all to lower
> bufferbloat. Or the Netalyzr test is broken?:-)
>
> many thanks for your advice,
> Jeroen
>
>
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>
>


-- 
Dave Täht

Fixing bufferbloat with cerowrt:
http://www.teklibre.com/cerowrt/subscribe.html
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