[Cerowrt-devel] Bufferbloat at LUG talk - Meeting Report

Maciej Soltysiak maciej at soltysiak.com
Sun Dec 9 12:32:03 EST 2012

Excellent job Richard! Those slides are very clean and informative and you
got fantastic real life user reports!
Point #1 is very common: lots of behind-the-scenes javascript, buffering,
asynchronous requests, facebook chat box and updates, etc.

I was trying to make a mock conversation for the purpose of providing a
story backing up the debloating efforts so that end users realize better
what's going on. Please, guys, have a look and comment:

Part 1 is an intro, also touching on tiered ISP services. Part 2 would be
what bufferbloat is all about. Part 3 is an outro to have the users have a
take-home message, also touching on DPI and other evil stuff ISPs do trying
to workaround the issues.

You can edit that wiki.

I couldn't post it on bufferbloat.net wiki because I don't seem to have
privilege to create new pages so I setup my own.


On Sun, Dec 9, 2012 at 5:56 PM, Richard Brown
<richard.e.brown at dartware.com>wrote:

> Folks,
> I gave the talk to the local Linux User Group on Thursday, and it went
> really well. Two people came up to me after the talk and said, in effect,
> "You know, I think I've seen this. But I've always blamed something else."
> Their experience:
> - Attempting to Skype with a bunch of web browser tabs open gives bad
> results. Closing the tabs made things better. (They been blaming the
> browser for "using too much memory". Now it's possible to think that it's a
> network problem.)
> - Another person reported that his network connection (wireless ISP, two
> hops to a wired network) seemed to work OK as long as his household was
> mostly downloading. But uploading much of anything really made things bad.
> I posted the slides at
> http://www.bufferbloat.net/attachments/download/148/Bufferbloat-DLSLUG-Dec2012.pdf
> Rich
> PS I've updated the CeroWrt site to include links to a bunch of relevant
> videos. (http://www.bufferbloat.net/projects/cerowrt/wiki/Bloat-videos)
> Please let me know if there are others that we should point to.
> On Nov 25, 2012, at 8:11 PM, Richard E. Brown <rbrown at intermapper.com>
> wrote:
> > Folks,
> >
> > I am planning to give a talk about Bufferbloat to the local Linux User
> Group next week (http://dlslug.org). All this traffic on the list is
> fantastic, because it gives me a lot of background on the current state of
> bufferbloat. I've pulled together a bunch of general questions about
> CeroWrt that I would like to be able to cover if they come up:
> >
> > - Is it true that the latest CeroWrt is Sugarland 3.3.8-26 from
> mid-September? (My router is using this build - r33460.)
> >
> > - I see the "QoS" item in the Network tab of the web GUI. Is this
> important for Sugarland? Or does some other router configuration take care
> of this now?
> >
> > - What's the relationship between the QoS GUI item above and the
> debloat.sh and simple_qos.sh scripts that have been mentioned on this list?
> What's the best practice here for getting a router up and running?
> >
> > - I can see how the CeroWrt de-bloating algorithms help protect against
> bad latency when I'm *uploading* big files. I'm not sure whether using
> CeroWrt with its CoDel/FQ/SFQ/etc. helps when I'm downloading big files,
> though. What can I say about this?
> >
> > - I believe the default DNS server in Sugarland is dnsmasq, not bind. Is
> DNSSEC enabled by default? Also: there's a report (Bug #411) that says that
> DNS is leaking internal names to the outside world. What's the best advice
> for closing this? ("list notinterface 'ge00'" is one recommendation…)
> >
> > - I've been assembling information about the various de-bloating
> techniques implemented in CeroWrt. It seems that Infoblox has recently
> reorganized their blogs, and the links published earlier this week have all
> broken. Here are updates:
> >
> >
> http://www.infoblox.com/community/blog/application-analysis-using-tcp-retransmissions-part-1
> >
> http://www.infoblox.com/community/blog/application-analysis-using-tcp-retransmissions-part-2
> > http://www.infoblox.com/community/blog/router-buffer-tuning
> >
> http://www.infoblox.com/community/blog/rethinking-interface-error-reports
> >
> > My plan is to give a little of the science behind bufferbloat mitigation
> and also put in a plug for CeroWrt. Any topics I haven't already mentioned
> that I should? Thanks!
> >
> > Rich Brown
> > Hanover, NH USA
> _______________________________________________
> Cerowrt-devel mailing list
> Cerowrt-devel at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/cerowrt-devel
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