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From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= <toke@toke.dk>
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To: Sebastian Moeller <moeller0@gmx.de>
Cc: Kenneth Porter <shiva@sewingwitch.com>, Bufferbloat Mailing List
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 <877dprp7z3.fsf@toke.dk> <472E7038-DC03-4A54-97BC-49999B78B343@gmx.de>
Date: Wed, 09 Dec 2020 12:20:57 +0100
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Subject: Re: [Bloat] Why you need at least 3Mbps upload to get good game
 performance with ~1500byte packets: Doing the math
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Sebastian Moeller <moeller0@gmx.de> writes:

> Hi Toke,
>
>
>> On Dec 9, 2020, at 11:52, Toke H=C3=B8iland-J=C3=B8rgensen via Bloat <bl=
oat@lists.bufferbloat.net> wrote:
>>=20
>> Kenneth Porter <shiva@sewingwitch.com> writes:
>>=20
>>> <https://forum.openwrt.org/t/why-you-need-at-least-3mbps-upload-to-get-=
good-game-performance-with-1500byte-packets-doing-the-math/81240>
>>>=20
>>> Upstream article:
>>>=20
>>> <http://models.street-artists.org/2020/12/05/why-gaming-on-a-dsl-line-i=
s-terrible-and-the-math-says-theres-nothing-you-can-do-about-it/>
>>=20
>> 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 game=
s 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