<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, May 24, 2016 at 11:02 AM, 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:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><span class="">On Tue, May 24, 2016 at 9:56 AM, Jonathan Morton <<a href="mailto:chromatix99@gmail.com">chromatix99@gmail.com</a>> wrote:<br>
><br>
>> On 24 May, 2016, at 18:52, Dave Täht <<a href="mailto:dave@taht.net">dave@taht.net</a>> wrote:<br>
>><br>
>> My last attempts with cake the way it was had it performing miserably at<br>
>> longer RTTs (try 50ms) vs codel or fq-codel - as in half the throughput<br>
>> achieved by codel, at that RTT.<br>
><br>
> Was that before or after I found and fixed the invsqrt cache bug yesterday?<br>
<br>
</span>That was back in december, when I had also ripped out the invsqrt<br>
cache entirely with things like "bcake".<br>
<br>
(I still do not see any point to the invsqrt cache, nor )<br>
<br>
I did some informal testing of recent cakes about a month back.. and<br>
went back to fq_codel. cake ate too much cpu, queue depth was longer,<br>
throughput at 50ms or longer, worse.<br>
<br>
I decided that I'd much rather work on wifi.<br>
<br>
Please test at longer rtts.<br></blockquote><div><br></div><div>It seems to me that fq_codel works very well. If the main issue is hash collisions, are there any plans to backport cake's "ways", which would make fq_codel pretty close to perfect as an AQM. Possibly even allow reduction of the hash-bucket sizes since they only scale with the log because of hash birthday attacks.<br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
<span class="im"><br>
<br>
<br>
<br>
> - Jonathan Morton<br>
><br>
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<br>
<br>
<br>
</span><span class=""><font color="#888888">--<br>
Dave Täht<br>
Let's go make home routers and wifi faster! With better software!<br>
<a href="http://blog.cerowrt.org" rel="noreferrer" target="_blank">http://blog.cerowrt.org</a><br>
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