netdev - Re: [PATCH iproute2] tc-cake: document 'ingress'

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Message-ID: <20240811093546.52c88499@hermes.local>
Date: Sun, 11 Aug 2024 09:35:45 -0700
From: Stephen Hemminger <stephen@...workplumber.org>
To: Lương Việt Hoàng <tcm4095@...il.com>
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH iproute2] tc-cake: document 'ingress'

On Sun, 11 Aug 2024 21:26:17 +0700
Lương Việt Hoàng <tcm4095@...il.com> wrote:

>  .SH OTHER PARAMETERS
> +.B ingress
> +.br
> +	Indicates that CAKE is running in ingress mode (i.e. running on the downlink
> +of a connection). This changes the shaper to also count dropped packets as data
> +transferred, as these will have already traversed the link before CAKE can
> +choose what to do with them.
> +
> +	In addition, the AQM will be tuned to always keep at least two packets
> +queued per flow. The reason for this is that retransmits are more expensive in
> +ingress mode, since dropped packets have to traverse the link again; thus,
> +keeping a minimum number of packets queued will improve throughput in cases
> +where the number of active flows are so large that they saturate the link even
> +at their minimum window size.
> +
> +.PP

Hadn't looked at the man page for CAKE in detail before, but it appears
to be trying to pre-format lots of stuff rather than using man format (nroff)
like other man pages.

For example: indenting the start of the paragraph in nroff source is odd
and unnecessary.