From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Monjalon Subject: Re: [PATCH] prefetch second cacheline of mbufs on alloc Date: Mon, 20 Jul 2015 03:00:59 +0200 Message-ID: <6143149.O6nc0QL3DF@xps13> References: <1431386118-2811-1-git-send-email-emmericp@net.in.tum.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Cc: dev@dpdk.org To: olivier.matz@6wind.com Return-path: Received: from mail-wi0-f172.google.com (mail-wi0-f172.google.com [209.85.212.172]) by dpdk.org (Postfix) with ESMTP id 8B49FC35E for ; Mon, 20 Jul 2015 03:02:12 +0200 (CEST) Received: by wibxm9 with SMTP id xm9so79195810wib.0 for ; Sun, 19 Jul 2015 18:02:12 -0700 (PDT) In-Reply-To: <1431386118-2811-1-git-send-email-emmericp@net.in.tum.de> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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); >