From patchwork Wed Sep 3 15:49:36 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bruce Richardson X-Patchwork-Id: 302 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id B38B958EE for ; Wed, 3 Sep 2014 17:45:07 +0200 (CEST) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 03 Sep 2014 08:49:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,458,1406617200"; d="scan'208";a="567777854" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga001.jf.intel.com with ESMTP; 03 Sep 2014 08:49:41 -0700 Received: from sivswdev02.ir.intel.com (sivswdev02.ir.intel.com [10.237.217.46]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id s83FneKI025437; Wed, 3 Sep 2014 16:49:40 +0100 Received: from sivswdev02.ir.intel.com (localhost [127.0.0.1]) by sivswdev02.ir.intel.com with ESMTP id s83Fnd7G010493; Wed, 3 Sep 2014 16:49:39 +0100 Received: (from bricha3@localhost) by sivswdev02.ir.intel.com with id s83Fndqk010489; Wed, 3 Sep 2014 16:49:39 +0100 From: Bruce Richardson To: dev@dpdk.org Date: Wed, 3 Sep 2014 16:49:36 +0100 Message-Id: <1409759378-10113-12-git-send-email-bruce.richardson@intel.com> X-Mailer: git-send-email 1.7.0.7 In-Reply-To: <1409759378-10113-1-git-send-email-bruce.richardson@intel.com> References: <1409759378-10113-1-git-send-email-bruce.richardson@intel.com> Subject: [dpdk-dev] [PATCH 11/13] mbuf: move l2_len and l3_len to second cache line 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: Wed, 03 Sep 2014 15:45:09 -0000 The l2_len and l3_len fields are used for TX offloads and so should be put on the second cache line, along with the other fields only used on TX. Signed-off-by: Bruce Richardson --- lib/librte_mbuf/rte_mbuf.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h index db079ac..d3c1745 100644 --- a/lib/librte_mbuf/rte_mbuf.h +++ b/lib/librte_mbuf/rte_mbuf.h @@ -159,8 +159,7 @@ struct rte_mbuf { uint16_t packet_type; /**< Type of packet, e.g. protocols used */ uint16_t data_len; /**< Amount of data in segment buffer. */ uint32_t pkt_len; /**< Total pkt len: sum of all segments. */ - uint16_t l3_len:9; /**< L3 (IP) Header Length. */ - uint16_t l2_len:7; /**< L2 (MAC) Header Length. */ + uint16_t reserved; uint16_t vlan_tci; /**< VLAN Tag Control Identifier (CPU order). */ union { uint32_t rss; /**< RSS hash result if RSS enabled */ @@ -176,6 +175,9 @@ struct rte_mbuf { struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */ struct rte_mbuf *next; /**< Next segment of scattered packet. */ + /* fields to support TX offloads */ + uint16_t l3_len:9; /**< L3 (IP) Header Length. */ + uint16_t l2_len:7; /**< L2 (MAC) Header Length. */ } __rte_cache_aligned; #define RTE_MBUF_METADATA_UINT8(mbuf, offset) \