From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 27EE2A04C2 for ; Mon, 25 Nov 2019 19:29:22 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 68EB62952; Mon, 25 Nov 2019 19:29:21 +0100 (CET) Received: from mail-pj1-f47.google.com (mail-pj1-f47.google.com [209.85.216.47]) by dpdk.org (Postfix) with ESMTP id E460D2952 for ; Mon, 25 Nov 2019 19:29:19 +0100 (CET) Received: by mail-pj1-f47.google.com with SMTP id gc1so6972306pjb.8 for ; Mon, 25 Nov 2019 10:29:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=l9fxvZVBZ96SsJ5EQ5kI2HrdoJk1Wa3uyw8oanUk7cI=; b=CztIMor83fzuQzCQu05JDRIb0FPiQiw5aIw+mEoU846jMwuXjKtLi2xoAD4ZT3t//F GOfi2E5Csi1ULsmGSGUgnUxtlHT5SMX4eX5ZAZmxZ69rKCsAPHJqE6ckEjW5eQPO0EbH yhTRBSK8WaSSK7tZRSKNQyd5a50GJx9XHmWJZtNaarKWpDx4aEeRsQW0lgO2CsteNNA1 pyfn4iGzXeOUjHal/BNo1Kf7vS/N9oO0OgPD3RyQCmY2piKbG1CjU3JhB4m3to6WEFPl BTndWZaR7fW+nDbqZbYL3k0QSBC2UKfE2yT3OxwXpBA4M6lsvJKbIRvBoF/3Io1hsetM HP4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=l9fxvZVBZ96SsJ5EQ5kI2HrdoJk1Wa3uyw8oanUk7cI=; b=BEPCvNjYUyoYVsRofb0a2716Cv1B7wK0iHF8rULECYa4CnmxD9Dc4Vldk+ND3woTp6 8jGajk5JqfHvvsBFN8QhUlYJ0XcZea+fAi2xYghCkDmHL+cqVcHW6RcK6LU1fSJHMe2e E1OCdVQaLAe5gzUEliMnGB1LXDKSVG2EitCsmON2tYH2OxXw3u454/oxfxpqRUow6tZU XzfGkidXRLlvFMQy8YHMsBP4tU3Q6H3Rvu3XxrWiHud94JyJxe9d/qrQXReqSygAJPAu 50YWasMRMo185pyi9whUi+oFqXOvudl6DUtHZD+892atIbcRWfuWZTpjHCcRZBz8c/qf G1vA== X-Gm-Message-State: APjAAAUAdUxOLeZln6uo2J3LCM3kmvm4lCZNfGtNVT2TBDqLZtGUxivi cZ2A/cDiDCSiWMt5cH33keZ9Kw== X-Google-Smtp-Source: APXvYqwazWtNwpTwE+NOjSOvzDVs+tIuL8Y07P7fUSH+9gG0E3BgcnOkloa/qOT5JG1JJBEAi/jilA== X-Received: by 2002:a17:90a:cc07:: with SMTP id b7mr299521pju.135.1574706558777; Mon, 25 Nov 2019 10:29:18 -0800 (PST) Received: from hermes.lan (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id c1sm59929pjc.23.2019.11.25.10.29.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Nov 2019 10:29:18 -0800 (PST) Date: Mon, 25 Nov 2019 10:29:10 -0800 From: Stephen Hemminger To: "Chengke Wang" Cc: users@dpdk.org Message-ID: <20191125102910.3da51a30@hermes.lan> In-Reply-To: <42d7bfa2.ad6c4.16e86f736a1.Coremail.wongck@pku.edu.cn> References: <42d7bfa2.ad6c4.16e86f736a1.Coremail.wongck@pku.edu.cn> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [dpdk-users] DPDK support for wireless NICs X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org Sender: "users" On Wed, 20 Nov 2019 11:59:38 +0800 (GMT+08:00) "Chengke Wang" wrote: > Dear all, >=20 >=20 >=20 >=20 > I found DPDK in order to implement a high-speed dataplane on 802.11ac. W= e have tested that in the scenario where two machines use Wi-Fi Direct to c= ommunicate, the goodput of TCP can reach above 800Mbps. >=20 >=20 >=20 >=20 >=20 >=20 > However, I learned that DPDK does not support wireless NICs now. Does DP= DK have special requirements of today=E2=80=99s commodity wireless NIC hard= ware? If not, is it feasible to bring in support of DPDK for wireless NICs = with modification *only* to the NIC driver? We want to work on this if the = change to the driver is all we need. >=20 There are no 802.11 wireless devices supported by DPDK and DPDK provides raw packet access only, no TCP. DPDK is generally not useful for data rates less than 1G bit/sec. You either have slow CPU's or other TCP queuing issues (bufferbloat). Checkout some of the queueing work in Linux and bufferbloat list.