From owner-freebsd-performance@FreeBSD.ORG Mon Jan 23 20:20:32 2012 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B3C051065677 for ; Mon, 23 Jan 2012 20:20:32 +0000 (UTC) (envelope-from mmarkowski@leon.pl) Received: from kameleon.leon.pl (kameleon.leon.pl [IPv6:2a02:c40:0:10::5bc3:8704]) by mx1.freebsd.org (Postfix) with ESMTP id 49F6A8FC14 for ; Mon, 23 Jan 2012 20:20:32 +0000 (UTC) Received: by kameleon.leon.pl (Postfix, from userid 1080) id D4503358C5B; Mon, 23 Jan 2012 21:20:29 +0100 (CET) To: X-PHP-Script: mail.leon.pl/index.php for 188.137.111.246 X-PHP-Originating-Script: 1080:main.inc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Date: Mon, 23 Jan 2012 21:20:29 +0100 From: Marcin Markowski Message-ID: X-Sender: mmarkowski@leon.pl User-Agent: Roundcube Webmail/0.6 Subject: Performance problem using Intel X520-DA2 X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Jan 2012 20:20:32 -0000 Hello, We use FreeBSD as sniffer (libpcap programs) and we experience performance problems when incoming traffic is greater than 7.5Gbps/s. If we check 'top' we see that first irq from network card is using 100% CPU. I've tested this on FreeBSD 8.2-RELEASE and 9.0-RELEASE (on 9.0 we can see also kernel thread named {ix0 que} using 100% CPU), and both systems behave the same. In logs we see also: interrupt storm detected on "irq268:"; throttling interrupt source Our server platform is Intel SR2600URBRP, 2x Xeon X5650, 6GB RAM and NIC Intel X520-DA2. I'm not sure if problem is with NIC or motherboard in SR2600URBRP, because everything is fine when we use other server configuration: Intel SR1630GP, 1x Xeon X3450, 8GB RAM, NIC X520-DA2 My /boot/loader.conf: kern.ipc.nmbclusters=262144 hw.ixgbe.rxd=2048 hw.ixgbe.txd=2048 hw.ixgbe.num_queues=16 /etc/sysctl.conf hw.intr_storm_threshold=10000 -- Marcin Markowski