[RFC PATCH] eventdev: ensure 16-byte alignment for events

[Morten Brørup]

> From: Bruce Richardson [mailto:bruce.richardson at intel.com]
> Sent: Thursday, 5 October 2023 13.51
ure 16-byte alignment for events
> 
> The event structure in DPDK is 16-bytes in size, and events are
> regularly passed as parameters directly rather than being passed as
> pointers. To help compiler optimize correctly, we can explicitly request
> 16-byte alignment for events, which means that we should be able
> to do aligned vector loads/stores (e.g. with SSE or Neon) when working
> with those events.
> 
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> ---

AFAICS it is not specified anywhere that the size of this struct must be 16 byte.

Consider adding this requirement to the struct documentation, and possibly a static_assert to verify.

Acked-by: Morten Brørup <mb at smartsharesystems.com>