[dpdk-dev] [PATCH] prefetch second cacheline of mbufs on alloc

[Thomas Monjalon]

Please Olivier,
What is the status of this patch?

2015-05-12 01:15, Paul Emmerich:
> this improves the throughput of a simple tx-only application by 11% in
> the full-featured ixgbe tx path and by 14% in the simple tx path.
> ---
>  lib/librte_mbuf/rte_mbuf.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
> index ab6de67..f6895b4 100644
> --- a/lib/librte_mbuf/rte_mbuf.h
> +++ b/lib/librte_mbuf/rte_mbuf.h
> @@ -538,6 +538,7 @@ static inline struct rte_mbuf *__rte_mbuf_raw_alloc(struct rte_mempool *mp)
>  	if (rte_mempool_get(mp, &mb) < 0)
>  		return NULL;
>  	m = (struct rte_mbuf *)mb;
> +	rte_prefetch0(&m->cacheline1);
>  	RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0);
>  	rte_mbuf_refcnt_set(m, 1);
>  	return (m);
>