From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mgw.gov.kz (mgw.gov.kz [89.218.88.242]) by dpdk.org (Postfix) with ESMTP id 919E16A80 for ; Mon, 7 Sep 2015 04:41:13 +0200 (CEST) Received: from mgw.gov.kz (mx.ctsat.kz [178.89.4.95]) by mgw.gov.kz with ESMTP id t872fCCh027249-t872fCCi027249; Mon, 7 Sep 2015 08:41:12 +0600 Received: from EXCASHUB1.rgp.local (192.168.40.51) by EdgeForefront.rgp.local (192.168.40.59) with Microsoft SMTP Server (TLS) id 14.2.247.3; Mon, 7 Sep 2015 08:41:07 +0600 Received: from [192.168.35.15] (192.168.35.15) by excashub1.rgp.local (192.168.40.48) with Microsoft SMTP Server (TLS) id 14.2.247.3; Mon, 7 Sep 2015 08:41:00 +0600 To: Kyle Larose References: <55E91AB2.4080604@sts.kz> From: Yerden Zhumabekov Message-ID: <55ECF93B.9020000@sts.kz> Date: Mon, 7 Sep 2015 08:40:59 +0600 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: X-Originating-IP: [192.168.35.15] X-FEAS-SYSTEM-WL: e_zhumabekov@sts.kz Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] pcap->eth low TX performance X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Sep 2015 02:41:13 -0000 tx burst sends, say, 10-15% percent of a supplied array. The tail is being ignored so I have to drop it to avoid overflow. Ethernet device is 82599. In my app, I transmit all traffic through a ring then feed it to eth. That leads to overflow as well. 04.09.2015 20:03, Kyle Larose пишет: > Are you reading from the pcap faster than the device can transmit? > Does the app hold off reading from the pcap when the ethdev is pushing > back, or does it just tail drop? > > On Fri, Sep 4, 2015 at 12:14 AM, Yerden Zhumabekov > > wrote: > > Hello, > > Did anyone try to work with pcap PMD recently? We're testing our app > with this setup: > > PCAP --- rte_eth_rx_burst--> APP-> rte_eth_tx_burst -> ethdev > > I'm experiencing very low TX performance leading to massive mbuf drop > while trying to send those packets over the Ethernet device. I tried > running ordinary l2fwd and got the same issue with over 80-90% of > packets drop. When I substitute PCAP with another ordinary Ethernet > device, everything works fine. Can anyone share an idea? > > -- > Sincerely, > > Yerden Zhumabekov > State Technical Service > Astana, KZ > > -- Sincerely, Yerden Zhumabekov State Technical Service Astana, KZ