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GET /api/patches/999218/?format=api
{ "id": 999218, "url": "http://patchwork.ozlabs.org/api/patches/999218/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20181117001924.1525-2-vinicius.gomes@intel.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20181117001924.1525-2-vinicius.gomes@intel.com>", "list_archive_url": null, "date": "2018-11-17T00:19:24", "name": "[next-queue,v1,2/2] Documentation: igb: Add a section about CBS", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "1840e6347c8bdaadb5ec0cc2a482844b460c5845", "submitter": { "id": 72272, "url": "http://patchwork.ozlabs.org/api/people/72272/?format=api", "name": "Vinicius Costa Gomes", "email": "vinicius.gomes@intel.com" }, "delegate": { "id": 68, "url": "http://patchwork.ozlabs.org/api/users/68/?format=api", "username": "jtkirshe", "first_name": "Jeff", "last_name": "Kirsher", "email": "jeffrey.t.kirsher@intel.com" }, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20181117001924.1525-2-vinicius.gomes@intel.com/mbox/", "series": [ { "id": 76554, "url": "http://patchwork.ozlabs.org/api/series/76554/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=76554", "date": "2018-11-17T00:19:23", "name": "[next-queue,v1,1/2] igb: Change RXPBSIZE size when setting Qav mode", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/76554/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/999218/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/999218/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Authentication-Results": [ "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=osuosl.org\n\t(client-ip=140.211.166.133; helo=hemlock.osuosl.org;\n\tenvelope-from=intel-wired-lan-bounces@osuosl.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org;\n\tdmarc=fail (p=none dis=none) header.from=intel.com" ], "Received": [ "from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 42xbNZ6Xfcz9sB7\n\tfor <incoming@patchwork.ozlabs.org>;\n\tSat, 17 Nov 2018 11:20:46 +1100 (AEDT)", "from localhost (localhost [127.0.0.1])\n\tby hemlock.osuosl.org (Postfix) with ESMTP id 533C687B40;\n\tSat, 17 Nov 2018 00:20:45 +0000 (UTC)", "from hemlock.osuosl.org ([127.0.0.1])\n\tby localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)\n\twith ESMTP id zQUHkSFkGK5z; Sat, 17 Nov 2018 00:20:44 +0000 (UTC)", "from ash.osuosl.org (ash.osuosl.org [140.211.166.34])\n\tby hemlock.osuosl.org (Postfix) with ESMTP id 33ADE87B2B;\n\tSat, 17 Nov 2018 00:20:44 +0000 (UTC)", "from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138])\n\tby ash.osuosl.org (Postfix) with ESMTP id EB2561BF298\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tSat, 17 Nov 2018 00:20:40 +0000 (UTC)", "from localhost (localhost [127.0.0.1])\n\tby whitealder.osuosl.org (Postfix) with ESMTP id E7E7881B74\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tSat, 17 Nov 2018 00:20:40 +0000 (UTC)", "from whitealder.osuosl.org ([127.0.0.1])\n\tby localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)\n\twith ESMTP id 1o08iCnJsvd3 for <intel-wired-lan@lists.osuosl.org>;\n\tSat, 17 Nov 2018 00:20:39 +0000 (UTC)", "from mga12.intel.com (mga12.intel.com [192.55.52.136])\n\tby whitealder.osuosl.org (Postfix) with ESMTPS id 76E4B870CC\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tSat, 17 Nov 2018 00:20:39 +0000 (UTC)", "from orsmga007.jf.intel.com ([10.7.209.58])\n\tby fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;\n\t16 Nov 2018 16:20:38 -0800", "from ellie.jf.intel.com (HELO localhost.localdomain)\n\t([10.54.70.81])\n\tby orsmga007.jf.intel.com with ESMTP; 16 Nov 2018 16:20:38 -0800" ], "X-Virus-Scanned": [ "amavisd-new at osuosl.org", "amavisd-new at osuosl.org" ], "X-Greylist": "domain auto-whitelisted by SQLgrey-1.7.6", "X-Amp-Result": "SKIPPED(no attachment in message)", "X-Amp-File-Uploaded": "False", "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.56,242,1539673200\"; d=\"scan'208\";a=\"89972902\"", "From": "Vinicius Costa Gomes <vinicius.gomes@intel.com>", "To": "intel-wired-lan@lists.osuosl.org", "Date": "Fri, 16 Nov 2018 16:19:24 -0800", "Message-Id": "<20181117001924.1525-2-vinicius.gomes@intel.com>", "X-Mailer": "git-send-email 2.19.1", "In-Reply-To": "<20181117001924.1525-1-vinicius.gomes@intel.com>", "References": "<20181117001924.1525-1-vinicius.gomes@intel.com>", "MIME-Version": "1.0", "Subject": "[Intel-wired-lan] [next-queue PATCH v1 2/2] Documentation: igb: Add\n\ta section about CBS", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n\t<intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "Cc": "netdev@vger.kernel.org, jesus.s.palencia@gmail.com", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "Add some pointers to the definition of the CBS algorithm, and some\nnotes about the limits of its implementation in the i210 family of\ncontrollers.\n\nSigned-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>\n---\n Documentation/networking/igb.rst | 19 +++++++++++++++++++\n 1 file changed, 19 insertions(+)", "diff": "diff --git a/Documentation/networking/igb.rst b/Documentation/networking/igb.rst\nindex ba16b86d5593..e87a4a72ea2d 100644\n--- a/Documentation/networking/igb.rst\n+++ b/Documentation/networking/igb.rst\n@@ -177,6 +177,25 @@ rate limit using the IProute2 tool. Download the latest version of the\n IProute2 tool from Sourceforge if your version does not have all the features\n you require.\n \n+Credit Based Shaper (Qav Mode)\n+------------------------------\n+When enabling the CBS qdisc in the hardware offload mode, traffic shaping using\n+the CBS (described in the IEEE 802.1Q-2018 Section 8.6.8.2 and discussed in the\n+Annex L) algorithm will run in the i210 controller, so it's more accurate and\n+uses less CPU.\n+\n+When using offloaded CBS, and the traffic rate obeys the configured rate\n+(doesn't go above it), CBS should have little to no effect in the latency.\n+\n+The offloaded version of the algorithm has some limits, caused by how the idle\n+slope is expressed in the adapter's registers. It can only represent idle slopes\n+in 16.38431 kbps units, which means that if a idle slope of 2576kbps is\n+requested, the controller will be configured to use a idle slope of ~2589 kbps,\n+because the driver rounds the value up. For more details, see the comments on\n+:c:func:`igb_config_tx_modes()`.\n+\n+NOTE: This feature is exclusive to i210 models.\n+\n \n Support\n =======\n", "prefixes": [ "next-queue", "v1", "2/2" ] }