[PATCH v6 7/7] vhost: optimize memcpy routines when cc memcpy is used

[Stephen Hemminger]

On Fri, 20 Sep 2024 12:27:16 +0200
Mattias Rönnblom <mattias.ronnblom at ericsson.com> wrote:

> +#if defined(RTE_USE_CC_MEMCPY) && defined(RTE_ARCH_X86_64)
> +static __rte_always_inline void
> +pktcpy(void *restrict in_dst, const void *restrict in_src, size_t len)
> +{
> +	void *dst = __builtin_assume_aligned(in_dst, 16);
> +	const void *src = __builtin_assume_aligned(in_src, 16);

Not sure if buffer is really aligned that way but x86 doesn't care.

Since src and dst can be pointers into mbuf at an offset.
The offset will be a multiple of the buffer len.