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Re: [tcpm] Poll for CUBIC RFC updates

"Scheffenegger, Richard" <rs.ietf@gmx.at> Tue, 17 November 2020 06:29 UTC

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To: Vidhi Goel <vidhi_goel=40apple.com@dmarc.ietf.org>, "tcpm@ietf.org Extensions" <tcpm@ietf.org>
References: <02721B41-690E-4CC2-BC26-223EDA4BFA45@apple.com>
From: "Scheffenegger, Richard" <rs.ietf@gmx.at>
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Date: Tue, 17 Nov 2020 07:29:50 +0100
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Subject: Re: [tcpm] Poll for CUBIC RFC updates
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We have been working on improving the FreeBSD Cubic implementation, to
bring it up from the originally implemented (early draft) version of
Cubic, to a more production ready state which is inline with the adopted
RFC version.

Having said this, the below changes sound reasonable and I will try to
adopt them for FreeBSD.

Richard


Am 17.11.2020 um 03:08 schrieb Vidhi Goel:
> Hello,
>
> As Lars mentioned earlier, there are a couple of issues/proposals filed
> for updating the CUBIC RFC 8312 and are currently under discussion. The
> GitHub repo is at https://github.com/NTAP/rfc8312bis.
> We would like to gather information on which CUBIC implementations
> already or would be ready to adopt these changes.
>
> 1. Update K definition (Eq. 2) to account for Fast Convergence
> Issue link https://github.com/NTAP/rfc8312bis/issues/1
> Linux already has this change. Apple's Cubic implementation for both TCP
> and QUIC already use this.
>
> 2. Congestion window TCP friendly region after W_max
> Issue link https://github.com/NTAP/rfc8312bis/issues/2
> This is a suggestion to improve performance after cwnd > W_max. Apple's
> Cubic implementation for both TCP and QUIC already use this.
>
>  From my experience, these changes would improve Cubic’s performance.
>
> Please let us know if you already or would be ready to implement these
> changes in your CUBIC’s implementation.
>
> Thanks,
> Vidhi
>
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