<br><br><div class="gmail_quote">On Wed, Jan 23, 2013 at 5:42 PM, Dave Taht <span dir="ltr"><<a href="mailto:dave.taht@gmail.com" target="_blank">dave.taht@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br><div class="gmail_quote"><div>fq_codel and derivatives like nfq_codel and cake do a good job of reducing latency under load, so I would hope that the remaining problem for a smoothing a babel + fq_codel network would be wifi power save (CAP can induce 200ms of delay or more) <br>

<br></div></div></blockquote><div><br>correction:<br><br>CAB (visual typo). It's not a particularly well understood aspect of how wifi works.<br><br><a href="http://adrianchadd.blogspot.com/2011/06/implementing-11n-tx-aggregation-why-its.html">http://adrianchadd.blogspot.com/2011/06/implementing-11n-tx-aggregation-why-its.html</a><br>
<a href="http://www.mail-archive.com/babel-users@lists.alioth.debian.org/msg00992.html">http://www.mail-archive.com/babel-users@lists.alioth.debian.org/msg00992.html</a><br> <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="gmail_quote"><div>Having a measurement of router-2-router latency would be a good way to distinguish between wifi, 10, 100, gigE, and tunneled networks.<br><br>Similarly I keep hoping that someone will look hard at the metrics that the minstrel algorithm can provide on a per connected host basis.<br>

<br><a href="https://www.bufferbloat.net/projects/cerowrt/wiki/Minstrel_Wireless_Rate_Selection" target="_blank">https://www.bufferbloat.net/projects/cerowrt/wiki/Minstrel_Wireless_Rate_Selection</a><br><br>it is a much more direct way of determining available bandwidth and connectivity (passive, too) and (actual in use bandwidth is something that cake throws to userspace too.)<br>

<br>regrettably I'm mostly working on polishing up the fq_codel work and sims for the next quarter.<br>  <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">

<br>
Great.<br>
<br>
Regards,<br>
<br>
JPS.<br>
<br>
><br>
> -- Juliusz<br>
> <br></div><div class="im">_______________________________________________<br>
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<br><br clear="all"><br>-- <br>Dave Täht<br>
<br>Fixing bufferbloat with cerowrt: <a href="http://www.teklibre.com/cerowrt/subscribe.html" target="_blank">http://www.teklibre.com/cerowrt/subscribe.html</a> 
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Dave Täht<br><br>Fixing bufferbloat with cerowrt: <a href="http://www.teklibre.com/cerowrt/subscribe.html" target="_blank">http://www.teklibre.com/cerowrt/subscribe.html</a>