From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx02.mlp.com (mx02.mlp.com [204.212.175.137]) by dpdk.org (Postfix) with ESMTP id DCC86201 for ; Fri, 10 Feb 2017 17:20:12 +0100 (CET) IronPort-PHdr: =?us-ascii?q?9a23=3AKP9jCBCtk6hIIULqLz3oUyQJP3N1i/DPJgcQr6Af?= =?us-ascii?q?oPdwSP37psmwAkXT6L1XgUPTWs2DsrQf2raQ4/+rCTJIyK3CmUhKSIZLWR4BhJ?= =?us-ascii?q?detC0bK+nBN3fGKuX3ZTcxBsVIWQwt1Xi6NU9IBJS2PAWK8TW94jEIBxrwKxd+?= =?us-ascii?q?KPjrFY7OlcS30P2594HObwlSijewZbx/IA+1oAjTucUbgopvIbstxxXUpXdFZ/?= =?us-ascii?q?5Yzn5yK1KJmBb86Maw/Jp9/ClVpvks6c1OX7jkcqohVbBXAygoPG4z5M3wqBnM?= =?us-ascii?q?VhCP6WcGUmUXiRVHHQ7I5wznU5jrsyv6su192DSGPcDzULs5Vyiu47ttRRT1ky?= =?us-ascii?q?oMKSI3/3/LhcxxlKJboQyupxpjw47PfYqZMONycr7Bcd8GQGZMWNtaWS5cDYOm?= =?us-ascii?q?d4YBD/QPM/tEr4fzpFUOoxmxBQiwC+3gxTBFnWP23bQ+3ug9DQ3KwBIsEtQTu3?= =?us-ascii?q?rUttX1M6ISXPi7wKfO1zrCbulZ2S3j54jOcRAhpumAVq9/fsrV00YgCh7OglGQ?= =?us-ascii?q?poziJTOV0vkCvXOG7+V6U+Kvl2srpw9sqTWoycgsjpPGiZ8Pxl7C7yp4wZw6Jc?= =?us-ascii?q?emR059Yt6kF4Bdti+dN4tsRsMtXnhouDsgxb0ApZ63ZjQFyJMixxPGbfGMbouG?= =?us-ascii?q?4gr7WeqMPTt0nnZodK6lixu870Ss0OPxW82s3FpXsiZJiNnBumoP2hHT8MSLV+?= =?us-ascii?q?dx8lq51TaByQ/e6f1ILEUxmKXAN5EswaU/m58RvETNAiP7nUv2jKGYdkk4/+Wl?= =?us-ascii?q?6Pnrbqj6qZKaKoR6kBvxMr40lcy6Gek4Nw8OUHWF9umkz73j+FH5QK1Njv0rjq?= =?us-ascii?q?nVqJDaKtofpq6+GwJb3Ycs5BiiATmkztoVg2ULIExfdB+bgYblIVbALvbiA/ul?= =?us-ascii?q?n1uslzJry+jHPr3nHJrNMmDOnKr9cbpn70NQ1BA/wN5B655OBLwMJOr/Wkrru9?= =?us-ascii?q?zZCh85PRa0w+HiCNhl2YweXXiADbKDPK3Uq1CJ5/ggI/OSa48Tuzb9LOMo5vDp?= =?us-ascii?q?jX8jnV8SYLCp3YYNZ3C+AvRqOVmWYX3pgtsZC2cFohI+TPD2iF2FSTNTfGqyUL?= =?us-ascii?q?wk5jE7Fo2mC5zORoazj7yd0ia7GYdWZmNeClCIDHfocp6LVOkWaC6IJc9hiDME?= =?us-ascii?q?X6C7S4A9zRGuqBP6y71/I+rJ4S0Xq4jj1MNu6uLOjRE96D90A96a02GXQGEn1l?= =?us-ascii?q?8PEnANwK1noUF7gneO1K15hfNVD5Mbs+hVXx86OJj0yeFmFNfoWRrFY9KDRUzg?= =?us-ascii?q?Rc+pV2IfVNU0lpUqalR0AdikjReHlxSuCrNd14OMHpg4y7/V2WSwbY4p9XLP2O?= =?us-ascii?q?8FhksvWMZJNmqOmall8wTKGofPjwOSkKP8JvdU5zLE6GrWlTnGh0pfSgMlFPyd?= =?us-ascii?q?BX0=3D?= X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A2EKAgDQ551Y/ycgWgpeGgEBAQECAQEBA?= =?us-ascii?q?QgBAQEBFAEBAQEBAQEBAQEBBwEBAQEBg3iBGQeNWpILkGOEU4INhiICgzgYAQE?= =?us-ascii?q?BAQEBAQEBAQECgQeCMxsBghoBAQEBAzo0CwwEAgEIDQQEAQEBChQJBzIUCQgBA?= =?us-ascii?q?QQOBQi8GiaLJQEBAQEBAQEBAQEBAQEBAQEBAQEBAR2GTYRuhCYRAR4FMYJ8gjE?= =?us-ascii?q?Fm3IBlA6FF4NEhi9Ikk0fgQcoCE+CJIRvdYdxgSGBDAEBAQ?= X-IPAS-Result: =?us-ascii?q?A2EKAgDQ551Y/ycgWgpeGgEBAQECAQEBAQgBAQEBFAEBAQE?= =?us-ascii?q?BAQEBAQEBBwEBAQEBg3iBGQeNWpILkGOEU4INhiICgzgYAQEBAQEBAQEBAQECg?= =?us-ascii?q?QeCMxsBghoBAQEBAzo0CwwEAgEIDQQEAQEBChQJBzIUCQgBAQQOBQi8GiaLJQE?= =?us-ascii?q?BAQEBAQEBAQEBAQEBAQEBAQEBAR2GTYRuhCYRAR4FMYJ8gjEFm3IBlA6FF4NEh?= =?us-ascii?q?i9Ikk0fgQcoCE+CJIRvdYdxgSGBDAEBAQ?= X-IronPort-AV: E=Sophos;i="5.35,142,1484024400"; d="scan'208";a="48705860" X-IronPort-Outbreak-Status: No, level 0, Unknown - Unknown Received: from unknown (HELO EXUSHTC02.AD.MLP.com) ([10.90.32.39]) by smtprfp.mlp.com with ESMTP; 10 Feb 2017 11:20:10 -0500 Received: from EXUSMBX06.AD.MLP.com ([fe80::bc8b:7f0:fff0:811c]) by EXUSHTC02.AD.MLP.com ([::1]) with mapi id 14.03.0248.002; Fri, 10 Feb 2017 11:20:10 -0500 From: "Lazarenko, Vlad (WorldQuant)" To: 'Stephen Hemminger' CC: "users@dpdk.org" Thread-Topic: [dpdk-users] When do we get non-contiguous mbufs from rte_eth_rx_burst? Thread-Index: AdKDIkjrapeyU4+yTh6Cf77oB9bdSQALGqeAABqn+3A= Date: Fri, 10 Feb 2017 16:20:09 +0000 Message-ID: <790E2AC11206AC46B8F4BB82078E34F80627E4E8@EXUSMBX06.AD.MLP.com> References: <790E2AC11206AC46B8F4BB82078E34F80627DB12@EXUSMBX06.AD.MLP.com> <20170209143519.7fd6061a@xeon-e3> In-Reply-To: <20170209143519.7fd6061a@xeon-e3> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.5.75.101] Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: Re: [dpdk-users] When do we get non-contiguous mbufs from rte_eth_rx_burst? X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Feb 2017 16:20:13 -0000 Stephen, Got it. Thank you bunches! - V > -----Original Message----- > From: Stephen Hemminger [mailto:stephen@networkplumber.org] > Sent: Thursday, February 09, 2017 5:35 PM > To: Lazarenko, Vlad (WorldQuant) > Cc: users@dpdk.org > Subject: Re: [dpdk-users] When do we get non-contiguous mbufs from > rte_eth_rx_burst? > = > On Thu, 9 Feb 2017 22:17:56 +0000 > "Lazarenko, Vlad (WorldQuant)" wrote: > = > > Hey everyone, > > > > Does anyone happen to know if it is possible to receive non-contiguous > mbufs from rte_eth_rx_burst? If so, when would this happen? I am thinking > that NICs with LSO enabled could possibly do this if data does not fit in= to > RTE_MBUF_DEFAULT_BUF_SIZE? But if the packet fits, I don't see why the > driver could possibly split that across multiple mbufs. Any insight is hi= ghly > appreciated. > > > > Thanks, > > Vlad > = > = > Any driver that handles jumbo frames is going to return a multiple segment > mbuf when given a mbuf pool with smaller buffers. It is common to create > 2K mbuf pool and handle 9K frames. > = > > > > > ################################################################### > ### > > ############# > > > > The information contained in this communication is confidential, may > > be > > > > subject to legal privilege, and is intended only for the individual nam= ed. > > > > If you are not the named addressee, please notify the sender > > immediately and > > > > delete this email from your system. The views expressed in this email > > are > > > > the views of the sender only. 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