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{
    "id": 76146,
    "url": "http://patches.dpdk.org/api/covers/76146/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/cover/1598685199-1630-1-git-send-email-tangchengchang@huawei.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": "<1598685199-1630-1-git-send-email-tangchengchang@huawei.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/1598685199-1630-1-git-send-email-tangchengchang@huawei.com",
    "date": "2020-08-29T07:13:15",
    "name": "[v3,0/4] add Rx buffer size for rxq info structure",
    "submitter": {
        "id": 1792,
        "url": "http://patches.dpdk.org/api/people/1792/?format=api",
        "name": "Chengchang Tang",
        "email": "tangchengchang@huawei.com"
    },
    "mbox": "http://patches.dpdk.org/project/dpdk/cover/1598685199-1630-1-git-send-email-tangchengchang@huawei.com/mbox/",
    "series": [
        {
            "id": 11847,
            "url": "http://patches.dpdk.org/api/series/11847/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=11847",
            "date": "2020-08-29T07:13:15",
            "name": "add Rx buffer size for rxq info structure",
            "version": 3,
            "mbox": "http://patches.dpdk.org/series/11847/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/covers/76146/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 7352FA04B1;\n\tSat, 29 Aug 2020 09:15:59 +0200 (CEST)",
            "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id C88BF1BFE3;\n\tSat, 29 Aug 2020 09:15:51 +0200 (CEST)",
            "from huawei.com (szxga04-in.huawei.com [45.249.212.190])\n by dpdk.org (Postfix) with ESMTP id 6159C1F1C\n for <dev@dpdk.org>; Sat, 29 Aug 2020 09:15:47 +0200 (CEST)",
            "from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.60])\n by Forcepoint Email with ESMTP id 92495C031B36B784BA5B;\n Sat, 29 Aug 2020 15:15:45 +0800 (CST)",
            "from localhost.localdomain (10.69.192.56) by\n DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id\n 14.3.487.0; Sat, 29 Aug 2020 15:15:37 +0800"
        ],
        "From": "Chengchang Tang <tangchengchang@huawei.com>",
        "To": "<dev@dpdk.org>",
        "CC": "<linuxarm@huawei.com>, <thomas@monjalon.net>, <arybchenko@solarflare.com>,\n <ferruh.yigit@intel.com>, <wenzhuo.lu@intel.com>, <maryam.tahhan@intel.com>",
        "Date": "Sat, 29 Aug 2020 15:13:15 +0800",
        "Message-ID": "<1598685199-1630-1-git-send-email-tangchengchang@huawei.com>",
        "X-Mailer": "git-send-email 2.7.4",
        "In-Reply-To": "<1592483709-7076-1-git-send-email-tangchengchang@huawei.com>",
        "References": "<1592483709-7076-1-git-send-email-tangchengchang@huawei.com>",
        "MIME-Version": "1.0",
        "Content-Type": "text/plain",
        "X-Originating-IP": "[10.69.192.56]",
        "X-CFilter-Loop": "Reflected",
        "Subject": "[dpdk-dev] [PATCH v3 0/4] add Rx buffer size for rxq info structure",
        "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": "In common practice, PMD configure the Rx buffer size which indicate the\nbuffer length could be used for HW in receiving packets according to the\ndata room size of the object in mempool. But in fact, the final value is\nrelated to the specifications of HW, and its values will affect the number\nof fragments in receiving packets when scatter is enabled. By the way,\nsome PMDs may force to enable scatter when the MTU is bigger than the HW\nRx buffer size.\n\nAt present, we have no way to expose relevant information to upper layer\nusers. So, add a field named rx_buf_size in rte_eth_rxq_info to indicate\nthe buffer size used in receiving packets for HW. And this field is\noptional, so there is no need to forcibly update all PMDs.\n\nThis patchset also update testpmd, proc-info tools and add hns3 PMD\nimplementation.\n\nChengchang Tang (4):\n  ethdev: add a field for rxq info structure\n  app/testpmd: add Rx buffer size display in queue info query\n  app/procinfo: add Rx buffer size to --show-port\n  net/hns3: add Rx buffer size to Rx qinfo query\n\n app/proc-info/main.c           | 2 ++\n app/test-pmd/config.c          | 1 +\n drivers/net/hns3/hns3_rxtx.c   | 2 ++\n lib/librte_ethdev/rte_ethdev.h | 2 ++\n 4 files changed, 7 insertions(+)\n\n--\n2.7.4"
}