From owner-freebsd-net@FreeBSD.ORG Fri Jan 23 18:58:09 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C05EBEF for ; Fri, 23 Jan 2015 18:58:09 +0000 (UTC) Received: from mail-ig0-x230.google.com (mail-ig0-x230.google.com [IPv6:2607:f8b0:4001:c05::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8795BC7 for ; Fri, 23 Jan 2015 18:58:09 +0000 (UTC) Received: by mail-ig0-f176.google.com with SMTP id hl2so3490942igb.3 for ; Fri, 23 Jan 2015 10:58:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=bvoDhz4ps94o1COIUlY+t45/AtWjZMbTGGV8fk5UWPI=; b=YrWaVrvC6ceoSe0RWuXddMhSjGmBwqQuOvvnOLeeFFarJD44yjmWkz5XyHkudYQclK VMqbw2Yp//OAKvd4PeJfjrpH1GscCXXk//MHxNeOLsr+yhd9/Y0b4Yjee2E/UKxi72WJ YoCAZ4oKu51gFnhsOrWWaayfA5LIJRopOjyqP1av43rpvFemp5jPLqCdfDkYRAD6xEde xF4HaTnvQuWI1y6lAqsrcWqppEw35uZ+TnueHlPwYBjFXBHi6AkJGEM4XnDxaNT/yjwL EqQp6dqyIc0gmBzU64B2brrkxsNkPkfR1x4C+gfL9o+WC0ToGN+fk88tS190xxmCrTZ+ /+hA== MIME-Version: 1.0 X-Received: by 10.107.169.222 with SMTP id f91mr5298156ioj.88.1422039489016; Fri, 23 Jan 2015 10:58:09 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.36.78.14 with HTTP; Fri, 23 Jan 2015 10:58:08 -0800 (PST) In-Reply-To: <5B08402C-67A7-49E7-ADF8-390C94DCF1D7@gmail.com> References: <5B08402C-67A7-49E7-ADF8-390C94DCF1D7@gmail.com> Date: Fri, 23 Jan 2015 10:58:08 -0800 X-Google-Sender-Auth: -9QGIfFkNNEc_kOE0_hfIRmz_88 Message-ID: Subject: Re: network locks up with udp traffic From: Adrian Chadd To: Dmitry Sivachenko Content-Type: text/plain; charset=UTF-8 Cc: FreeBSD Net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Jan 2015 18:58:09 -0000 Hi, When this next happens, please do this as root: procstat -ka That'll hopefully provide enough information to figure out which processes are blocking where and how they got there. -a On 23 January 2015 at 06:27, Dmitry Sivachenko wrote: > Hello! > > I am using FreeBSD-10/stable. We have a program at work that transmits data via UDP. > When I run several instances of this program simultaneously, after a few seconds network stops working. > If I login from console, I see some network daemons like ntpd, snmpd are in "*udp" state. > > If I try to deal with network interface (ifconfig igb0 for instance), ifconfig utility stuck in "L" state (Marks a process that is waiting to acquire a lock.). > I found the only way to fix that: reboot. > > What can be the cause for such a behaviour? > > Thanks. > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"