[Cerowrt-devel] Linksys wrt1900acs rrul traces

[Dave Taht]

It does look like the hardware is going kaboom on a regular interval.
Shades of the old ip mis-alignment bugs we had on the 3800, where the
hardware would burp when it got a packet of a certain type.

Dave Täht
Let's go make home routers and wifi faster! With better software!
https://www.gofundme.com/savewifi

On Thu, Apr 7, 2016 at 10:50 AM, moeller0 <moeller0 at gmx.de> wrote:

> Hi Aaron,
>
>
> On Apr 7, 2016, at 19:42 , Aaron Wood <woody77 at gmail.com> wrote:
>
> These are really impressive results (flent graphs attached for the
> "simple" operation).
>
> Especially so, considering to what I see with sqm_scripts on the same
> hardware with CCrc3:
> http://burntchrome.blogspot.com/2015/06/sqmscripts-before-and-after-at-160mbps.html
>
>
> Richard has an wrt1900acs (https://wikidevi.com/wiki/Linksys_WRT1900ACS),
> while I believe you have an wrt1900AC (
> https://wikidevi.com/wiki/Linksys_WRT1900AC) so Richard’s seems a bit
> more recent and powerful. Or I am an idiot and can not read properly…
>
> Best Regards
> Sebastian
>
>
> Is this stable enough for full-time usage (as a home router)?
>
> -Aaron
>
> On Thu, Apr 7, 2016 at 6:58 AM, Richard Smith <smithbone at gmail.com> wrote:
> A while ago I mentioned that I purchased a Linksys wrt1900acs and I was
> going to do some comparisons of speed/rrul for stock firmware and stuff
> running sqm.
>
> It took a while to happen but I finally got it done.  I was stalled for a
> long time because for a while OpenWRT was not complete for this router.  It
> would boot but you could not (easily) return to the factory firmware as
> updates via the OpenWRT web interface did not work.
>
> Command line updates still worked though periodically I would build dd
> head and see if it got fixed.  Finally one weekend I decided to dig in and
> figure out what was going wrong and discovered that someone else beat me to
> it and it all was working now.
>
> The following flent rrul runs were run here on my local Gbit network
> (pretty quiet) using with OpenWrt Designated Driver r49051 / LuCI Master
> (git-16.081.38806-6b9a743) + Cake installed.
>
> Cake installed via the instructions here:
>
>
> http://www.bufferbloat.net/projects/codel/wiki/Cake#Installing-CAKE-out-of-tree-on-OpenWrt-rough-instructions
>
> For these tests I had the inbound and outbound limits set to 975000 kbps.
>  975000 was somewhat arbitrary.  I wanted it below 1Gbps enough that I
> could be sure it was the router as the limit but yet fast enough that I
> would be able to see the peak transfer rates.
>
> Test setup is:
>
> Laptop<-->wrt1900acs<--->Gbit Switch<--->Netperf server
>
> Prior to running the tests I did trial runs without the wrt1900acs in the
> chain to verify every thing worked at Gbit speeds.
>
> I ran the rrul test for each of the SQM settings at least 5 times.  For
> layer cake and piece of cake each had a run with results that were way off
> from the previous run.  I'm assuming this is some yet to be fixed issue and
> so I ran it 1 more time so that there were 5 runs with similar results.
>
> All the raw files are in this tarball:
>
>
> https://drive.google.com/file/d/0B-P0wCbNmKvAWmRUSzNMdXpUOFE/view?usp=sharing
>
> Hope this is helpful.  I'll be happy to run any additional tests if
> someone wants more.
>
> --
> Richard A. Smith
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