Re: PSA pt 1: for better videoconferencing at home on slow links

[Michael Thomas <[e-mail]>]

On 4/25/20 1:02 PM, Dave Taht wrote:
> On Sat, Apr 25, 2020 at 12:54 PM Michael Thomas <[e-mail]> wrote:
>> Dave asked to try this on my openwrt router at home. this is with SQM on
>> which got A A A
>>
>> http://www.dslreports.com/speedtest/62830190
>>
>> this is SQM off and it got a C for bufferbloat and a B overall
>>
>> http://www.dslreports.com/speedtest/62830524
> wow, 560ms of peak bufferbloat on the down, and 240 on the up. vs
> ~50ms each way.
>
> you should def try correcting for your dsl framing also. you are
> leaving some bandwidth on the floor.

Which knob would that be? And note the second URL is the one with SQM OFF


Mike

>
>> Mike
>>
>> On 4/25/20 10:37 AM, Dave Taht wrote:
>>> for some reason I am not getting any ietf mailing list mail. too many
>>> useful links in the last one? :/
>>>
>>> How bad is your dslreports test (send link privately if you like)
>>>
>>> For openwrt: you need to install luci-app-sqm on openwrt for a gui and
>>> the related kernel modules. You need to do a bit of testing.
>>>
>>> opkg update
>>> opkg install luci-ssl luci-app-sqm # I pull in the full ssl gui as well.
>>>
>>> see configuration guide:
>>> https://openwrt.org/docs/guide-user/network/traffic-shaping/sqm
>>>
>>> as for autoconf, well, if ISPs shared their actual up/down rates and
>>> encapsulations with their users with a standard message (there is one
>>> appearing for pppoe), it would be a better world. Those ISPs
>>> optimizing their networks dynamically should also be providing a
>>> regular update to their users over a std api, IMHO.
>>>
>>> There's been some really cool work recently on getting good graphs of
>>> latency, loss, and marking, out of collectd and sch_cake:
>>>
>>> https://forum.openwrt.org/t/sqm-reporting/59960/28
>>>
>>>
>>>
>
> --
> Make Music, Not War
>
> Dave Täht
> CTO, TekLibre, LLC
> http://www.teklibre.com
> Tel: [phone]