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{ "id": 75417, "url": "http://patches.dpdk.org/api/covers/75417/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/cover/20200811095017.2682-1-ciara.loftus@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": "<20200811095017.2682-1-ciara.loftus@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20200811095017.2682-1-ciara.loftus@intel.com", "date": "2020-08-11T09:50:16", "name": "[RFC,0/1] net/af_xdp: shared UMEM support", "submitter": { "id": 144, "url": "http://patches.dpdk.org/api/people/144/?format=api", "name": "Loftus, Ciara", "email": "ciara.loftus@intel.com" }, "mbox": "http://patches.dpdk.org/project/dpdk/cover/20200811095017.2682-1-ciara.loftus@intel.com/mbox/", "series": [ { "id": 11597, "url": "http://patches.dpdk.org/api/series/11597/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=11597", "date": "2020-08-11T09:50:16", "name": "net/af_xdp: shared UMEM support", "version": 1, "mbox": "http://patches.dpdk.org/series/11597/mbox/" } ], "comments": "http://patches.dpdk.org/api/covers/75417/comments/", "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@inbox.dpdk.org", "Delivered-To": "patchwork@inbox.dpdk.org", "Received": [ "from dpdk.org (dpdk.org [92.243.14.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 640E2A04AF;\n\tTue, 11 Aug 2020 12:14:32 +0200 (CEST)", "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id B44994C9D;\n\tTue, 11 Aug 2020 12:14:31 +0200 (CEST)", "from mga02.intel.com (mga02.intel.com [134.134.136.20])\n by dpdk.org (Postfix) with ESMTP id B9C5B4C99\n for <dev@dpdk.org>; Tue, 11 Aug 2020 12:14:29 +0200 (CEST)", "from fmsmga008.fm.intel.com ([10.253.24.58])\n by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 11 Aug 2020 03:14:28 -0700", "from silpixa00399839.ir.intel.com (HELO localhost.localdomain)\n ([10.237.222.116])\n by fmsmga008.fm.intel.com with ESMTP; 11 Aug 2020 03:14:27 -0700" ], "IronPort-SDR": [ "\n fPtyJeZMmciY6ZGRHX74aV/RtmTZuAVRL0ePLFlE9ii5fJX3e+59YBc9171Lxnswj4kvyLelmi\n XmJ14PAxA2TQ==", "\n xNoiHtwBAJhxpGLpuh8T5npC3SiLAc485HW/rNMfg0scp8WPyNlFSuqHxh+TTXl4Esjcx3pnvk\n J81eHx1RNhlQ==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6000,8403,9709\"; a=\"141560409\"", "E=Sophos;i=\"5.75,460,1589266800\"; d=\"scan'208\";a=\"141560409\"", "E=Sophos;i=\"5.75,460,1589266800\"; d=\"scan'208\";a=\"277535605\"" ], "X-Amp-Result": "SKIPPED(no attachment in message)", "X-Amp-File-Uploaded": "False", "X-ExtLoop1": "1", "From": "Ciara Loftus <ciara.loftus@intel.com>", "To": "dev@dpdk.org", "Cc": "Ciara Loftus <ciara.loftus@intel.com>", "Date": "Tue, 11 Aug 2020 09:50:16 +0000", "Message-Id": "<20200811095017.2682-1-ciara.loftus@intel.com>", "X-Mailer": "git-send-email 2.17.1", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "8bit", "Subject": "[dpdk-dev] [PATCH RFC 0/1] net/af_xdp: shared UMEM support", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "This RFC integrates shared UMEM support into the AF_XDP PMD. It is based on the\nWIP kernel series [1] by Magnus Karlsson.\n\nDetailed information on the shared UMEM feature can be found in the final patch\nin the aforementioned series.\n\nSupport for the kernel feature can eventually be detected in DPDK by querying\nthe LINUX_KERNEL_VERSION. As of now the feature is not yet merged upstream, so\nfor this RFC it is assumed the user is using a patched version of v5.8.\n\nShared UMEM is only available for zero copy mode.\n\nIn order to share UMEM information between PMDs, the ethdevs wishing to share\nmust be tracked somehow. The method chosen to do so is similar to methods used\nin the vHost [2] and vDPA drivers, where pointers to the ethdevs are maintained\nin an internal list. Proposals for alternate solutions are welcome.\n\nPerformance data to follow with the v1.\n\n[1] https://patchwork.ozlabs.org/project/netdev/cover/1595307848-20719-1-git-send-email-magnus.karlsson@intel.com/\n[2] https://git.dpdk.org/dpdk/commit/?id=ee584e9710b9abd60ee9faef664e106dcea10085\n\nCiara Loftus (1):\n net/af_xdp: shared UMEM support\n\n doc/guides/nics/af_xdp.rst | 5 +-\n drivers/net/af_xdp/rte_eth_af_xdp.c | 315 ++++++++++++++++++++++------\n 2 files changed, 252 insertions(+), 68 deletions(-)" }