From owner-freebsd-stable Mon Jan 28 10:53:20 2002 Delivered-To: freebsd-stable@freebsd.org Received: from petra.vif.com (ip216-239-64-165.vif.net [216.239.64.165]) by hub.freebsd.org (Postfix) with ESMTP id 09E7637B404 for ; Mon, 28 Jan 2002 10:53:15 -0800 (PST) Received: (from squid@localhost) by petra.vif.com (8.11.6/8.11.6) id g0SIrEo07315 for stable@FreeBSD.ORG; Mon, 28 Jan 2002 13:53:14 -0500 (EST) (envelope-from talist@vif.com) X-Authentication-Warning: petra.vif.com: squid set sender to talist@vif.com using -f Received: from 216.239.71.137 ( [216.239.71.137]) as user talist@mail.vif.com by email.vif.com with HTTP; Mon, 28 Jan 2002 13:53:14 -0500 Message-ID: <1012243994.3c559e1a0e0d5@email.vif.com> Date: Mon, 28 Jan 2002 13:53:14 -0500 From: talist@vif.com To: stable@FreeBSD.ORG Subject: Crashing Freebsd + Dummynet + heavy traffic MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit User-Agent: Internet Messaging Program (IMP) 4.0-cvs Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I am using a freebsd box as a gateway in order to throttle down bandwidth for some particular traffic. The box freezes under high load and the only way to recover is through a power cycle. The crash does not generate any logs, but I have ruled out hardware causes. I can repeat the lock-out with 2 different hardware and with xl(4) and dc(4) NIC's I am suspecting a problem with DUMMYNET's PIPE and QUEUE. I have collected all the config information about the machine with a small script that helps in crashing the box after a few minutes of alternating the dummynet pipe's size. http://www.geocities.com/dummynetus/ipfw.txt In summary, I have tried the following: - Boost maxusers to 128 - Boost NMBCLUSTERS to 10240 - monitor netstat -m gives normal readings even before freeze To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message