From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id E58F245948; Mon, 9 Sep 2024 10:31:16 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id D59C140691; Mon, 9 Sep 2024 10:31:16 +0200 (CEST) Received: from smtp-fw-9106.amazon.com (smtp-fw-9106.amazon.com [207.171.188.206]) by mails.dpdk.org (Postfix) with ESMTP id AE1CD402BB for <dev@dpdk.org>; Mon, 9 Sep 2024 10:31:15 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1725870676; x=1757406676; h=from:to:cc:date:message-id:references:in-reply-to: content-transfer-encoding:mime-version:subject; bh=DbjTiEKM59nZm0Y27eiw7PNKDZhZ5HMEwV/OOo4VcFo=; b=L26s7GSwRnbFleceCthGPNKKNo97rQcGyEAbJd3ILzIwx/PAG0wyAVAP Z6VeX9lE4rJgyFxPyK2tdFpV+neeDgF5quEpljvy4jjE1i9cT9JzxyIH1 zZ9C/XarPQm338zI2w2zA3zQCzbnQNICFPAs/2O4AZFRghJxVg1c2Fcrs 4=; X-IronPort-AV: E=Sophos;i="6.10,213,1719878400"; d="scan'208";a="757926743" Subject: RE: Does DPDK provide RX timestamps? Thread-Topic: Does DPDK provide RX timestamps? Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO smtpout.prod.us-east-1.prod.farcaster.email.amazon.dev) ([10.25.36.210]) by smtp-border-fw-9106.sea19.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Sep 2024 08:31:09 +0000 Received: from EX19MTAEUA001.ant.amazon.com [10.0.17.79:40053] by smtpin.naws.eu-west-1.prod.farcaster.email.amazon.dev [10.0.13.102:2525] with esmtp (Farcaster) id 3e9c8ccb-fd3a-43c2-94b8-629d25056573; Mon, 9 Sep 2024 08:31:07 +0000 (UTC) X-Farcaster-Flow-ID: 3e9c8ccb-fd3a-43c2-94b8-629d25056573 Received: from EX19D007EUA004.ant.amazon.com (10.252.50.76) by EX19MTAEUA001.ant.amazon.com (10.252.50.192) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34; Mon, 9 Sep 2024 08:31:07 +0000 Received: from EX19D007EUA002.ant.amazon.com (10.252.50.68) by EX19D007EUA004.ant.amazon.com (10.252.50.76) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.35; Mon, 9 Sep 2024 08:31:07 +0000 Received: from EX19D007EUA002.ant.amazon.com ([fe80::1295:20d9:141e:47cc]) by EX19D007EUA002.ant.amazon.com ([fe80::1295:20d9:141e:47cc%3]) with mapi id 15.02.1258.035; Mon, 9 Sep 2024 08:31:07 +0000 From: "Brandes, Shai" <shaibran@amazon.com> To: "dpdkuser77@gmail.com" <dpdkuser77@gmail.com> CC: "dev@dpdk.org" <dev@dpdk.org> Thread-Index: AQHbAj7++YnDNd0KKUiMznZ+b2aZOrJOz2B7gAAaf4CAADEjoA== Date: Mon, 9 Sep 2024 08:31:07 +0000 Message-ID: <9ea0149e749043338d5a860c08c5106a@amazon.com> References: <CAJgPhro2CF2gzouZmz0seKDzNej540GzuA_UyCGpG_zZT2gCwA@mail.gmail.com> <8a180c35-c4fd-4760-a4fa-f7d3ff360fab@email.android.com> <40e44bc0f788441ea70f48a33bef7f59@amazon.com> In-Reply-To: <40e44bc0f788441ea70f48a33bef7f59@amazon.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.1.213.12] Content-Type: text/plain; charset="windows-1255" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <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>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org > =EE=E0=FA: Dpdk Newbie <dpdkuser77@gmail.com > <mailto:dpdkuser77@gmail.com> > > =FA=E0=F8=E9=EA: 9 =E1=F1=F4=E8=D7 2024 01:32 > =F0=E5=F9=E0: [EXTERNAL] Does DPDK provide RX timestamps? > =E0=EC: dev@dpdk.org <mailto:dev@dpdk.org> > =FE=F2=E5=FA=F7: >=20 >=20 >=20 > Hi. I am using Intel (i210) and AWS ENA network interface cards. >=20 >=20 >=20 > I would like to measure the following RX latencies: >=20 > 1) NIC to DPDK packet ring buffer >=20 > 2) DPDK packet ring buffer to application via rte_eth_rx_burst. >=20 [Brandes, Shai] Hi, currently AWS doesn=92t support HW timestamping. In order to get the full Rx latency you need to measure rte_eth_rx_burst as= it is mapped to ENA driver routine eth_ena_recv_pkts which covers the enti= re flow including NIC to DPDK packet ring buffer flow (ena_com_rx_pkt) All the best Shai > I don't mind measuring in nanoseconds or CPU cycles. >=20 >=20 > Unfortunately I cannot find any mention of hardware timestamps. >=20 >=20 > I found brief references to mbuf containing a timestamp in the dynamic > fields, but nothing definitive. >=20 > Could someone please clarify what the situation is? >=20 > Thanks,