From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from nsmail03.e.nsc.no (nsmail03.e.nsc.no [148.123.33.135]) by dpdk.org (Postfix) with ESMTP id 6056F93FA for ; Fri, 12 Feb 2016 13:32:08 +0100 (CET) Received: from obh-fbu.ti.telenor.net (unknown [148.122.202.157]) by nsmail03.e.nsc.no (Postfix) with ESMTP id 1573140164 for ; Fri, 12 Feb 2016 13:32:07 +0100 (CET) From: obh@telenor.net (Ole =?utf-8?Q?Bj=C3=B8rn?= Hessen) To: users@dpdk.org Date: Fri, 12 Feb 2016 13:32:07 +0100 Message-ID: <87pow2yurc.fsf@obh-fbu.ti.telenor.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: [dpdk-users] Output to /dev/console provokes packet loss? X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Feb 2016 12:32:08 -0000 Hi, I'm running a DPDK application on HP ProLiant DL360 Gen9, BIOS P89 and CentoS 7.2.1511 with a 10Gb 2-port 560SFP+ Adapter/ixgbe. A periodically packet loss (increasing stats.imissed) was traced back to log messages to /dev/console. A simple loop like this provoked the packet loss: while :; do echo "foo bar" > /dev/console; done =20=20=20 I saw the same ting when running stock kernel and running standard iperf so my guess is a problem with the BIOS / motherboard / ILO and not DPDK. Does anybody have any other hypothesis? Regards, Ole Bj=C3=B8rn Hessen. Telenor.