[Bloat] Why you need at least 3Mbps upload to get good game performance with ~1500byte packets: Doing the math

[Toke Høiland-Jørgensen]

Sebastian Moeller <moeller0 at gmx.de> writes:

> Hi Toke,
>
>
>> On Dec 9, 2020, at 11:52, Toke Høiland-Jørgensen via Bloat <bloat at lists.bufferbloat.net> wrote:
>> 
>> Kenneth Porter <shiva at sewingwitch.com> writes:
>> 
>>> <https://forum.openwrt.org/t/why-you-need-at-least-3mbps-upload-to-get-good-game-performance-with-1500byte-packets-doing-the-math/81240>
>>> 
>>> Upstream article:
>>> 
>>> <http://models.street-artists.org/2020/12/05/why-gaming-on-a-dsl-line-is-terrible-and-the-math-says-theres-nothing-you-can-do-about-it/>
>> 
>> Good points, but doesn't mention options to decrease the packet size
>> (lower MTU/MSS clamping)... :)
>
> 	But he is doing exactly that in the script he developed for OpenWrt games on poor links:

Ah, cool! May be necessary to actually decrease the interface MTU as
well, though, since TCP MSS clamping won't work for QUIC...

And of course, for IPv6 you can't decrease the MTU below 1280 bytes
without breaking spec :(

-Toke