From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 87A5DA00E6 for ; Sun, 14 Apr 2019 11:34:00 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 664984CA7; Sun, 14 Apr 2019 11:33:59 +0200 (CEST) Received: from mail-qt1-f178.google.com (mail-qt1-f178.google.com [209.85.160.178]) by dpdk.org (Postfix) with ESMTP id C73302BD8 for ; Tue, 9 Apr 2019 18:28:14 +0200 (CEST) Received: by mail-qt1-f178.google.com with SMTP id d13so20532833qth.5 for ; Tue, 09 Apr 2019 09:28:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=jlOjhWFg5zPYNP2aMn20XO+5C2UYSBbB/VRA+KvnIcg=; b=AAhiDs0CwlLzauE6z2UjiyjGC22ckMw6a9xHPH1oHEF6/BjosubW61TwYtUCiQaeuD wNi+Cyq5f5tYq28v9D9BCc7UnEN6P5H9jd6cpMTHTK6IjvxL5ihnb8HrmZDQNskdyg4N ezb3FIrUf0jBmZ+K/yidO6klTCNQjKrIHlkTBrmmmc7iIPo79GPTbChabXAokk8+otn4 T7eE6pg+uySxBPSZogMdFU82N76Sth7pT2H2ra3qgMtqoYUnkmOTyJ6DoIUT5wRo9zXQ gmNQQvzwimRSeLcafPlB0X8Jd0VtpEA2nYLarqWpBub86aRZXU+d240zuiACBlE3NFoV hbOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=jlOjhWFg5zPYNP2aMn20XO+5C2UYSBbB/VRA+KvnIcg=; b=AgfpCfO7NxTu9wM3EBsgusQ6Xcq1X9AwBBwyzFGcI827rlKx6r1tB0oafLG1PSo90l yUGNL1c5KNhrNuLKAhmB54gAUd+hkWE2ngG4GP8WOCa8xje52Bl0q0NP3mdwMWI0fwV4 OLheZS0f1cZ9/1RHaRUv2GB+NAx0GB2oK3vbD38mgAeGFjpj4h05XfTV3kwIdshiKPUg GfDxrju6CIDR3NXeL3EbK5/WjHOOeLz+H7VdIe55FSIpPFfJc0XmnH1LmmYGIaLycHYi M4GbT0iWAFywQ34e4HN/AyvVn2sbI/MaPSt9IoIHFcjEY/1sf2wOF2uEBMe/44LBG9XH +pLQ== X-Gm-Message-State: APjAAAWb9XGmtBGEQlse8866MvmljHVO87sDaPlgnoCONzRmpZPtMtVE pQdAX3OpDRaTRcrynE++5qrI+03GTu+cEkIHJEY= X-Google-Smtp-Source: APXvYqxIxbVfhD447SL5d9+RUD5i5vjEAFZE0xMejRecoRDH6iZUA9ICfp+2eapbNRc1+2R3OhWLF4/U/9eCWR2Fldk= X-Received: by 2002:a0c:f903:: with SMTP id v3mr30666520qvn.152.1554827293950; Tue, 09 Apr 2019 09:28:13 -0700 (PDT) MIME-Version: 1.0 References: <70E275B3-70E9-4DEB-9DC6-74EF12188684@intel.com> In-Reply-To: <70E275B3-70E9-4DEB-9DC6-74EF12188684@intel.com> From: Gokilavani A Date: Tue, 9 Apr 2019 21:58:01 +0530 Message-ID: To: "Wiles, Keith" Cc: users@dpdk.org X-Mailman-Approved-At: Sun, 14 Apr 2019 11:33:58 +0200 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: Re: [dpdk-users] Reg: Performance degradation in DPDK-18.11 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" Hi, Sorry for missing that setup info. Setup Details: NIC - Intel 82599ES 10 Gigabit Ethernet Controller(X520-DA2 adapter) Host processor - i7-4790k processor OS - CentOS 7.1 I am trying to send a fixed size traffic using my application. With the same code on dpdk - 17.05.2 and dpdk- 17.08.2, I am able to get the expected transmission rate of 9.623G for 512 bytes. Simple run of the same code on dpdk 18.11 , gives the transmission rate of 9.6G (getting nearly 20 Mbps reduced rate). To trace back which version cause this problem, I tried the same with the dpdk-18.02.2 and dpdk-17.11, got the same lowest transmission rate. Not only for 512B, for other framesizes too, observing this rate issue. I thought it may due to any timing related API changes. I have gone through the release notes for such timer regarding DPDK library change.I am not able to find any hint on this. Kindly help me to get rid of this issue. Thanks A.Gokilavani On Tue, Apr 9, 2019, 6:46 PM Wiles, Keith wrote: > > > > On Apr 8, 2019, at 7:01 AM, Gokilavani A > wrote: > > > > Hi, > > > > We have written simple Traffic Generator using DPDK. > > > > We used a DPDK version of 17.05.2 then 17.08.2. > > > > When we want to move that code to latest LTS version 18.11, performanc= e > > seems to be degraded interms of rate. > > > > Even for 512B, got this rate reduction issue in transmission. Is it > because > > of any timing APIs changed in 18.11? > > > > Tried with DPDK 17.11, got the same problem. When I gone through the > > documents, not able to find any timer regarding API change or bug fixin= g. > > > > Can any one help me in this regard? > > You may want to give more details, NICs used, setup of hardware, what is > the host system used, how is the generator sending packets (fixed packets > or modified on the fly, =E2=80=A6) > > What was the performance difference with the DPDK versions you tried? > > Have you tried Pktgen, TRex or testpmd to see if they have the same > performance problem? > > > > > > > Thanks > > > > A.Gokilavani > > Regards, > Keith > >