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GET /api/patches/302/?format=api
http://patches.dpdk.org/api/patches/302/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/1409759378-10113-12-git-send-email-bruce.richardson@intel.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<1409759378-10113-12-git-send-email-bruce.richardson@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/1409759378-10113-12-git-send-email-bruce.richardson@intel.com", "date": "2014-09-03T15:49:36", "name": "[dpdk-dev,11/13] mbuf: move l2_len and l3_len to second cache line", "commit_ref": "", "pull_url": "", "state": "superseded", "archived": true, "hash": "7376d234240ecb79118835ba4760451283582526", "submitter": { "id": 20, "url": "http://patches.dpdk.org/api/people/20/?format=api", "name": "Bruce Richardson", "email": "bruce.richardson@intel.com" }, "delegate": null, "mbox": "http://patches.dpdk.org/project/dpdk/patch/1409759378-10113-12-git-send-email-bruce.richardson@intel.com/mbox/", "series": [], "comments": "http://patches.dpdk.org/api/patches/302/comments/", "check": "pending", "checks": "http://patches.dpdk.org/api/patches/302/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<bricha3@ecsmtp.ir.intel.com>", "Received": [ "from mga02.intel.com (mga02.intel.com [134.134.136.20])\r\n\tby dpdk.org (Postfix) with ESMTP id B38B958EE\r\n\tfor <dev@dpdk.org>; Wed, 3 Sep 2014 17:45:07 +0200 (CEST)", "from orsmga001.jf.intel.com ([10.7.209.18])\r\n\tby orsmga101.jf.intel.com with ESMTP; 03 Sep 2014 08:49:42 -0700", "from irvmail001.ir.intel.com ([163.33.26.43])\r\n\tby orsmga001.jf.intel.com with ESMTP; 03 Sep 2014 08:49:41 -0700", "from sivswdev02.ir.intel.com (sivswdev02.ir.intel.com\r\n\t[10.237.217.46])\r\n\tby irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id\r\n\ts83FneKI025437; Wed, 3 Sep 2014 16:49:40 +0100", "from sivswdev02.ir.intel.com (localhost [127.0.0.1])\r\n\tby sivswdev02.ir.intel.com with ESMTP id s83Fnd7G010493;\r\n\tWed, 3 Sep 2014 16:49:39 +0100", "(from bricha3@localhost)\r\n\tby sivswdev02.ir.intel.com with id s83Fndqk010489;\r\n\tWed, 3 Sep 2014 16:49:39 +0100" ], "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.04,458,1406617200\"; d=\"scan'208\";a=\"567777854\"", "From": "Bruce Richardson <bruce.richardson@intel.com>", "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\r\n\tcache line", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "patches and discussions about DPDK <dev.dpdk.org>", "List-Unsubscribe": "<http://dpdk.org/ml/options/dev>,\r\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://dpdk.org/ml/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<http://dpdk.org/ml/listinfo/dev>,\r\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "X-List-Received-Date": "Wed, 03 Sep 2014 15:45:09 -0000" }, "content": "The l2_len and l3_len fields are used for TX offloads and so should be\nput on the second cache line, along with the other fields only used on\nTX.\n\nSigned-off-by: Bruce Richardson <bruce.richardson@intel.com>\n---\n lib/librte_mbuf/rte_mbuf.h | 6 ++++--\n 1 file changed, 4 insertions(+), 2 deletions(-)", "diff": "diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h\r\nindex db079ac..d3c1745 100644\r\n--- a/lib/librte_mbuf/rte_mbuf.h\r\n+++ b/lib/librte_mbuf/rte_mbuf.h\r\n@@ -159,8 +159,7 @@ struct rte_mbuf {\r\n \tuint16_t packet_type; /**< Type of packet, e.g. protocols used */\r\n \tuint16_t data_len; /**< Amount of data in segment buffer. */\r\n \tuint32_t pkt_len; /**< Total pkt len: sum of all segments. */\r\n-\tuint16_t l3_len:9; /**< L3 (IP) Header Length. */\r\n-\tuint16_t l2_len:7; /**< L2 (MAC) Header Length. */\r\n+\tuint16_t reserved;\r\n \tuint16_t vlan_tci; /**< VLAN Tag Control Identifier (CPU order). */\r\n \tunion {\r\n \t\tuint32_t rss; /**< RSS hash result if RSS enabled */\r\n@@ -176,6 +175,9 @@ struct rte_mbuf {\r\n \tstruct rte_mempool *pool; /**< Pool from which mbuf was allocated. */\r\n \tstruct rte_mbuf *next; /**< Next segment of scattered packet. */\r\n \r\n+\t/* fields to support TX offloads */\r\n+\tuint16_t l3_len:9; /**< L3 (IP) Header Length. */\r\n+\tuint16_t l2_len:7; /**< L2 (MAC) Header Length. */\r\n } __rte_cache_aligned;\r\n \r\n #define RTE_MBUF_METADATA_UINT8(mbuf, offset) \\\r\n", "prefixes": [ "dpdk-dev", "11/13" ] }{ "id": 302, "url": "