[MirageOS-devel] copying packets

[Hannes Mehnert <hannes@xxxxxxxxxxx>]

Hi (sorry if you already saw this),

recently Luke Gorrie explained whether packet copies are expensive or
not -- https://github.com/SnabbCo/snabbswitch/issues/648 -- on modern
CPUs.  Even if the packet is not page aligned, it seems to be fair
enough to not have to think about copies of packets, and just do it ;)

(Downside for mirage is certainly that there's still no inline assembly
in OCaml, thus we've to call out to a C function which seems to be
slightly expensive.)


hannes

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