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{
    "id": 20212,
    "url": "http://patches.dpdk.org/api/patches/20212/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/1486448555-95730-1-git-send-email-wenzhuo.lu@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": "<1486448555-95730-1-git-send-email-wenzhuo.lu@intel.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/1486448555-95730-1-git-send-email-wenzhuo.lu@intel.com",
    "date": "2017-02-07T06:22:35",
    "name": "[dpdk-dev] doc: announce ixgbe MTU setting limitation",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "e69f0260a54086af2b7e01d74a06c5487753e946",
    "submitter": {
        "id": 258,
        "url": "http://patches.dpdk.org/api/people/258/?format=api",
        "name": "Wenzhuo Lu",
        "email": "wenzhuo.lu@intel.com"
    },
    "delegate": {
        "id": 319,
        "url": "http://patches.dpdk.org/api/users/319/?format=api",
        "username": "fyigit",
        "first_name": "Ferruh",
        "last_name": "Yigit",
        "email": "ferruh.yigit@amd.com"
    },
    "mbox": "http://patches.dpdk.org/project/dpdk/patch/1486448555-95730-1-git-send-email-wenzhuo.lu@intel.com/mbox/",
    "series": [],
    "comments": "http://patches.dpdk.org/api/patches/20212/comments/",
    "check": "fail",
    "checks": "http://patches.dpdk.org/api/patches/20212/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
        "X-Original-To": "patchwork@dpdk.org",
        "Delivered-To": "patchwork@dpdk.org",
        "Received": [
            "from [92.243.14.124] (localhost [IPv6:::1])\n\tby dpdk.org (Postfix) with ESMTP id A5643FFA;\n\tTue,  7 Feb 2017 07:22:32 +0100 (CET)",
            "from mga07.intel.com (mga07.intel.com [134.134.136.100])\n\tby dpdk.org (Postfix) with ESMTP id 5A1B39E7\n\tfor <dev@dpdk.org>; Tue,  7 Feb 2017 07:22:30 +0100 (CET)",
            "from orsmga001.jf.intel.com ([10.7.209.18])\n\tby orsmga105.jf.intel.com with ESMTP; 06 Feb 2017 22:22:29 -0800",
            "from dpdk26.sh.intel.com ([10.239.128.228])\n\tby orsmga001.jf.intel.com with ESMTP; 06 Feb 2017 22:22:28 -0800"
        ],
        "X-ExtLoop1": "1",
        "X-IronPort-AV": "E=Sophos; i=\"5.33,345,1477983600\"; d=\"scan'208\";\n\ta=\"1091718401\"",
        "From": "Wenzhuo Lu <wenzhuo.lu@intel.com>",
        "To": "dev@dpdk.org",
        "Cc": "Wenzhuo Lu <wenzhuo.lu@intel.com>",
        "Date": "Tue,  7 Feb 2017 14:22:35 +0800",
        "Message-Id": "<1486448555-95730-1-git-send-email-wenzhuo.lu@intel.com>",
        "X-Mailer": "git-send-email 1.9.3",
        "Subject": "[dpdk-dev] [PATCH] doc: announce ixgbe MTU setting limitation",
        "X-BeenThere": "dev@dpdk.org",
        "X-Mailman-Version": "2.1.15",
        "Precedence": "list",
        "List-Id": "DPDK patches and discussions <dev.dpdk.org>",
        "List-Unsubscribe": "<http://dpdk.org/ml/options/dev>,\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>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>",
        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>\n---\n doc/guides/nics/ixgbe.rst | 16 ++++++++++++++--\n 1 file changed, 14 insertions(+), 2 deletions(-)",
    "diff": "diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst\nindex 3b6851b..1f7d6b3 100644\n--- a/doc/guides/nics/ixgbe.rst\n+++ b/doc/guides/nics/ixgbe.rst\n@@ -185,8 +185,11 @@ As in the case of l3fwd, set configure port_conf.rxmode.hw_ip_checksum=0 to enab\n In addition, for improved performance, use -bsz \"(32,32),(64,64),(32,32)\" in load_balancer to avoid using the default burst size of 144.\n \n \n+Limitations or Known issues\n+---------------------------\n+\n Malicious Driver Detection not Supported\n-----------------------------------------\n+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n The Intel x550 series NICs support a feature called MDD (Malicious\n Driver Detection) which checks the behavior of the VF driver.\n@@ -207,7 +210,7 @@ it by default.)\n \n \n Statistics\n-----------\n+~~~~~~~~~~\n \n The statistics of ixgbe hardware must be polled regularly in order for it to\n remain consistent. Running a DPDK application without polling the statistics will\n@@ -230,6 +233,15 @@ be calculated as follows:\n \n In order to ensure valid results, it is recommended to poll every 4 minutes.\n \n+MTU setting\n+~~~~~~~~~~~\n+\n+Although user can set MTU separately on PF and VF ports, ixgbe only supports\n+one global MTU per physical port.\n+So when user sets different MTUs on PF and VF ports in one physical port, the\n+real MTU for all these PF and VF ports is the biggest one.\n+This behavior is leveraged from kernel driver.\n+\n \n Supported Chipsets and NICs\n ---------------------------\n",
    "prefixes": [
        "dpdk-dev"
    ]
}