[PATCH v4] virtio: optimize stats counters performance

[Stephen Hemminger]

On Wed, 31 Jul 2024 22:58:16 +0000
Morten Brørup <mb at smartsharesystems.com> wrote:

> +
> +static inline void
> +virtio_update_packet_stats(struct virtnet_stats *const stats, const struct rte_mbuf *const mbuf)
> +{
> +	uint32_t s = mbuf->pkt_len;
> +	const struct rte_ether_addr *ea = rte_pktmbuf_mtod(mbuf, const struct rte_ether_addr *);
> +
> +	stats->bytes += s;
> +
> +	if (s >= 1024)
> +		stats->size_bins[6 + (s > 1518)]++;
> +	else if (s <= 64)
> +		stats->size_bins[s >> 6]++;
> +	else
> +		stats->size_bins[32UL - rte_clz32(s) - 5]++;
> +
> +	RTE_BUILD_BUG_ON(offsetof(struct virtnet_stats, broadcast) !=
> +			offsetof(struct virtnet_stats, multicast) + sizeof(uint64_t));
> +	if (unlikely(rte_is_multicast_ether_addr(ea)))
> +		(&stats->multicast)[rte_is_broadcast_ether_addr(ea)]++;
> +}
>  

Why move it to virtio_rxtx.h it was fine where it was.