From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 3A9018E68 for ; Fri, 30 Oct 2015 11:52:40 +0100 (CET) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 30 Oct 2015 03:52:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,217,1444719600"; d="scan'208";a="838757642" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by orsmga002.jf.intel.com with ESMTP; 30 Oct 2015 03:52:36 -0700 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id t9UAqY60012296; Fri, 30 Oct 2015 18:52:34 +0800 Received: from shecgisg004.sh.intel.com (localhost [127.0.0.1]) by shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id t9UAqWBf008859; Fri, 30 Oct 2015 18:52:34 +0800 Received: (from zhetao@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t9UAqWCg008855; Fri, 30 Oct 2015 18:52:32 +0800 From: Zhe Tao To: dev@dpdk.org Date: Fri, 30 Oct 2015 18:52:14 +0800 Message-Id: <1446202336-8723-7-git-send-email-zhe.tao@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1446202336-8723-1-git-send-email-zhe.tao@intel.com> References: <1443373527-28948-1-git-send-email-zhe.tao@intel.com> <1446202336-8723-1-git-send-email-zhe.tao@intel.com> Subject: [dpdk-dev] [PATCH 6/8 v2] change the postion of data prefetch for splitter packets X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Oct 2015 10:52:40 -0000 according to ixgbe vector implementation, change the data prefetch position Signed-off-by: Zhe Tao --- drivers/net/i40e/i40e_rxtx_vec.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/net/i40e/i40e_rxtx_vec.c b/drivers/net/i40e/i40e_rxtx_vec.c index 6f89002..f5b2db6 100644 --- a/drivers/net/i40e/i40e_rxtx_vec.c +++ b/drivers/net/i40e/i40e_rxtx_vec.c @@ -314,13 +314,6 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts, __m128i zero, staterr, sterr_tmp1, sterr_tmp2; __m128i mbp1, mbp2; /* two mbuf pointer in one XMM reg. */ - if (split_packet) { - rte_prefetch0(&rx_pkts[pos]->cacheline1); - rte_prefetch0(&rx_pkts[pos + 1]->cacheline1); - rte_prefetch0(&rx_pkts[pos + 2]->cacheline1); - rte_prefetch0(&rx_pkts[pos + 3]->cacheline1); - } - /* B.1 load 1 mbuf point */ mbp1 = _mm_loadu_si128((__m128i *)&sw_ring[pos]); /* Read desc statuses backwards to avoid race condition */ @@ -341,6 +334,13 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts, /* B.2 copy 2 mbuf point into rx_pkts */ _mm_storeu_si128((__m128i *)&rx_pkts[pos+2], mbp2); + if (split_packet) { + rte_prefetch0(&rx_pkts[pos]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 1]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 2]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 3]->cacheline1); + } + /*shift the pktlen field*/ desc_pktlen_align(descs); -- 1.9.3