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{
    "id": 75951,
    "url": "http://patches.dpdk.org/api/covers/75951/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/cover/1598407034-19061-1-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": "<1598407034-19061-1-git-send-email-tangchengchang@huawei.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/1598407034-19061-1-git-send-email-tangchengchang@huawei.com",
    "date": "2020-08-26T01:57:11",
    "name": "[0/3] add RX buffer size for rte_eth_rxq_info",
    "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/1598407034-19061-1-git-send-email-tangchengchang@huawei.com/mbox/",
    "series": [
        {
            "id": 11787,
            "url": "http://patches.dpdk.org/api/series/11787/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=11787",
            "date": "2020-08-26T01:57:12",
            "name": "add RX buffer size for rte_eth_rxq_info",
            "version": 1,
            "mbox": "http://patches.dpdk.org/series/11787/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/covers/75951/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 1C778A04B1;\n\tWed, 26 Aug 2020 03:59:45 +0200 (CEST)",
            "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 4AA7E14581;\n\tWed, 26 Aug 2020 03:59:39 +0200 (CEST)",
            "from huawei.com (szxga06-in.huawei.com [45.249.212.32])\n by dpdk.org (Postfix) with ESMTP id C36F64C99\n for <dev@dpdk.org>; Wed, 26 Aug 2020 03:59:35 +0200 (CEST)",
            "from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.59])\n by Forcepoint Email with ESMTP id 8B8E74559712621D3D9C;\n Wed, 26 Aug 2020 09:59:33 +0800 (CST)",
            "from localhost.localdomain (10.69.192.56) by\n DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id\n 14.3.487.0; Wed, 26 Aug 2020 09:59:23 +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>",
        "Date": "Wed, 26 Aug 2020 09:57:11 +0800",
        "Message-ID": "<1598407034-19061-1-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 0/3] add RX buffer size for rte_eth_rxq_info",
        "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 add hns3 PMD implementation and update the testpmd.\n\nChengchang Tang (3):\n  ethdev: add a field for rte_eth_rxq_info\n  app/testpmd: Add RX buffer size display in queue info querry\n  net/hns3: add rx buffer size to rx qinfo querry\n\n app/test-pmd/config.c          | 1 +\n drivers/net/hns3/hns3_rxtx.c   | 2 ++\n lib/librte_ethdev/rte_ethdev.h | 2 ++\n 3 files changed, 5 insertions(+)\n\n--\n2.7.4"
}