From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.iitb.ac.in (smtp1.iitb.ac.in [103.21.127.13]) by dpdk.org (Postfix) with ESMTP id 816092BA1 for ; Thu, 2 Mar 2017 12:13:22 +0100 (CET) Received: from ldns1.iitb.ac.in (ldns1.iitb.ac.in [10.200.12.1]) by smtp1.iitb.ac.in (Postfix) with SMTP id A394A122 for ; Thu, 2 Mar 2017 16:43:21 +0530 (IST) Received: (qmail 4004 invoked by uid 510); 2 Mar 2017 16:43:21 +0530 X-Qmail-Scanner-Diagnostics: from 10.200.1.25 by ldns1 (envelope-from , uid 501) with qmail-scanner-2.11 spamassassin: 3.4.1. mhr: 1.0. {clamdscan: 0.99.2/23153} Clear:RC:1(10.200.1.25):SA:0(0.0/5.6):. Processed in 0.740528 secs; 02 Mar 2017 16:43:21 +0530 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on ldns1.iitb.ac.in X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.6 tests=IITB_ORIG,PROPER_IITB_MSGID, T_RP_MATCHES_RCVD autolearn=disabled version=3.4.1 X-Spam-Pyzor: Reported 0 times. X-Envelope-From: ppnaik@cse.iitb.ac.in X-Qmail-Scanner-Mime-Attachments: | X-Qmail-Scanner-Zip-Files: | Received: from unknown (HELO ldns1.iitb.ac.in) (10.200.1.25) by ldns1.iitb.ac.in with SMTP; 2 Mar 2017 16:43:20 +0530 Received: from jeeves.cse.iitb.ac.in (miller.cse.iitb.ac.in [10.129.3.1]) by ldns1.iitb.ac.in (Postfix) with ESMTP id 725DC360040; Thu, 2 Mar 2017 16:43:20 +0530 (IST) Received: by jeeves.cse.iitb.ac.in (Postfix, from userid 51934) id 6B8258C239B; Thu, 2 Mar 2017 16:43:20 +0530 (IST) Received: from www.cse.iitb.ac.in (localhost [127.0.0.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by jeeves.cse.iitb.ac.in (Postfix) with ESMTPSA id EBBC98C2359; Thu, 2 Mar 2017 16:43:19 +0530 (IST) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Date: Thu, 02 Mar 2017 16:43:19 +0530 From: ppnaik To: Yuanhan Liu Cc: mitali , , In-Reply-To: <20170223062714.GX18844@yliu-dev.sh.intel.com> References: <58AAC534.7000004@cse.iitb.ac.in> <20170222084323.GP18844@yliu-dev.sh.intel.com> <92b5577b-8c8a-e199-3b65-54323dbea48c@cse.iitb.ac.in> <20170223062714.GX18844@yliu-dev.sh.intel.com> Message-ID: X-Sender: ppnaik@cse.iitb.ac.in User-Agent: Roundcube Webmail/RCMAIL_VERSION Subject: Re: [dpdk-users] [dpdk-dev] seg fault in InterVM communication using virtio 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: , X-List-Received-Date: Thu, 02 Mar 2017 11:13:22 -0000 Hi, We have some doubt regarding virtio front end. As we are running dpdk application inside VM with virtio setup, do we need to use virtio specific functions like virtio_recv_pkts() and virtio_xmit_pkts() to receive and transmit packets, functions for port initialization like virtio_dev_queue_setup()? If yes, we are unable to find any application which uses these functions. Can you provide us some pointers on examples which uses these functions. Thanks, Priyanka On 2017-02-23 11:57, Yuanhan Liu wrote: > On Wed, Feb 22, 2017 at 02:25:29PM +0530, mitali wrote: >> Hi Yuanhan, >> >> We are using virt-manager to start the VMs. We are attaching the >> image which >> shows the vNIC setup for the VMs. >> >> We have written our own dpdk application to send and receive UDP >> packets. The >> command we are using is >> >> ./build/app/dpdkapi -c 1 -- -p 1 where dpdkapi is our application. >> >> Inside the application we are sending and receiving packets from >> vNIC using >> rte_eth_tx_burst() and rte_eth_rx_burst(). >> >> At the sender side after 127 packets the application stops and we >> observe a seg >> fault in dmesg. Using the print statements we observed that it >> faults in >> rte_eth_tx_burst(). All the 127 were received at the receiving VM. > > Would you recompile dpdk with debug info enaled, which could be done > by: > > make ... EXTRA_CFLAGS='-g3 -O0' > > And run it with gdb then dump the call stack? > > --yliu