[PATCH v3 00/18] add "windowsize" (RFC 7440) support for tftp

[Sascha Hauer]

On Mon, Aug 15, 2022 at 10:42:04AM +0200, Enrico Scholz wrote:
> The tftp "windowsize" greatly improves the performance of tftp
> transfers.  This patchset adds support for it.
> 
> The first two patches are a little bit unrelated and enhance the 'cp
> -v' output by giving information about the transfer speed.  They can
> be dropped if they are unwanted.
> 
> I tested the function with an iMX8MP platform in three environments:
> 
>   - at home over OpenVPN on an ADSL 50 line  -->  27x speedup
>   - 1 Gb/s connection --> 9x speedup
>   - connection over 100 Mb/s switch  -->  4x speedup
> 
> In the test, I downloaded variable sized files which were filled from
> /dev/urandom.  E.g.
> 
> | :/ global tftp.windowsize=128
> | :/ cp -v /mnt/tftp/data-100MiB /tmp/data && sha1sum /tmp/data
> |         [################################################################] 104857600 bytes, 98550375 bytes/s
> 
> For slow connection speeds, smaller files (1MiB, 4 MiB + 20 MiB) were
> used.

Applied this series beginning with patch 3 for now.

Sascha

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