[Cerowrt-devel] Routing limit question

[Sebastian Moeller]

Hi Ernesto,

I would recommend to not run the netperf processes on the router you want to assess, if possible. Shaping at the rates you are interested in probably will take 100% CPU of the router, so there is no slack for running net server and netperf instances at the same time. Also I would recommend to use netperf-wrapper (https://github.com/tohojo/netperf-wrapper) instead of netperfrunner.sh as it allows so much nicer visualization of the queueing over time. netperfrunner.sh is great tool for quick testing and figuring out link capacities and worst case latency under load increase (LULI), but for more thorough comparisons it ain’t made. Netperf-wrapper will run under linux and macosx natively, but will also run (well enough) in a linux virtual machine on a windows box.


Best Regards
	Sebastian


On Oct 19, 2014, at 21:16 , Ernesto Elias <ernestogelias at gmail.com> wrote:

> root at cerowrt:~# /usr/lib/CeroWrtScripts/netperfrunner.sh
> 2014-10-19 15:10:27 Testing netperf.bufferbloat.net (ipv4) with 4 streams down a                                                                                                                                                             nd up while pinging gstatic.com. Takes about 60 seconds.
>  Download:  30.49 Mbps
>    Upload:  46.52 Mbps
>   Latency: (in msec, 61 pings, 0.00% packet loss)
>       Min: 19.848
>     10pct: 19.958
>    Median: 20.743
>       Avg: 21.229
>     90pct: 22.739
>       Max: 30.491
> root at cerowrt:~# /usr/lib/CeroWrtScripts/netperfrunner.sh
> 2014-10-19 15:11:54 Testing netperf.bufferbloat.net (ipv4) with 4 streams down a                                                                                                                                                             nd up while pinging gstatic.com. Takes about 60 seconds.
>  Download:  7.02 Mbps
>    Upload:  63.68 Mbps
>   Latency: (in msec, 61 pings, 0.00% packet loss)
>       Min: 21.690
>     10pct: 117.997
>    Median: 153.983
>       Avg: 150.851
>     90pct: 180.777
>       Max: 190.265
> 
> 
> The first result i gotten by only shaping the uplink and the second results are for only shaping the downlink...
> 
> and for the testing i put 0 on the for the downlink and uplink when I was testing for the opposite. and I put 50000 in it when I was shaping it for the test. Am I doing it right ?
> 
> On Sun, Oct 19, 2014 at 2:51 PM, Dave Taht <dave.taht at gmail.com> wrote:
> shape the download only, then measure. shape the upload only, then measure.
> 
> On Sun, Oct 19, 2014 at 11:48 AM, Ernesto Elias <ernestogelias at gmail.com> wrote:
> > Oh OK I mean I was just wondering because I was trying to figure out what
> > should I have put in the sqm tab because I saw that the wndr3800 tops out at
> > 50 mbit combined of download and upload right? As of now I have it at 25/25
> > on the page. Is that right or should I just shape the upload?
> >
> > On Oct 19, 2014 2:24 PM, "Dave Taht" <dave.taht at gmail.com> wrote:
> >>
> >> On at least one verizon device I've tried it appeared that they had
> >> SFQ or something similar on egress from the modem.
> >>
> >>
> >> http://www.bufferbloat.net/projects/codel/wiki/RRUL_Rogues_Gallery#Verizon-FIOS-Testing-at-25Mbit-up-and-25Mbit-down
> >>
> >> So you only needed to shape the download. which is good as we start
> >> peaking out at 50Mbit download total. But only measurements can tell.
> >>
> >>
> >> On Sun, Oct 19, 2014 at 10:51 AM, Ernesto Elias <ernestogelias at gmail.com>
> >> wrote:
> >> > Hello everyone!
> >> > I have a question about the wndr3800 routing limit. I went back to the
> >> > older
> >> > submissions to see if I can find what would be the answer for it. But in
> >> > my
> >> > search I haven't managed to find a definite answer. From what I seen
> >> > about
> >> > setting the limit it can do with SQM is 50, 60, or 80 mbit. I'm just
> >> > wondering if anyone can shed some light for me here as I have verizon
> >> > fios
> >> > and my speeds are 50 dl/50 ul. Thank you guys very much!
> >> >
> >> > _______________________________________________
> >> > Cerowrt-devel mailing list
> >> > Cerowrt-devel at lists.bufferbloat.net
> >> > https://lists.bufferbloat.net/listinfo/cerowrt-devel
> >> >
> >>
> >>
> >>
> >> --
> >> Dave Täht
> >>
> >> thttp://www.bufferbloat.net/projects/bloat/wiki/Upcoming_Talks
> 
> 
> 
> --
> Dave Täht
> 
> thttp://www.bufferbloat.net/projects/bloat/wiki/Upcoming_Talks
> 
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