From owner-freebsd-net@FreeBSD.ORG Thu Feb 12 14:28:44 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E8A8A16A4CE for ; Thu, 12 Feb 2004 14:28:44 -0800 (PST) Received: from mail.palnet.com (mail.palnet.com [217.66.226.37]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0500343D2F for ; Thu, 12 Feb 2004 14:28:43 -0800 (PST) (envelope-from mustafa@palnet.com) Received: from felfel (dogbert.palnet.com [192.116.17.51]) by mail.palnet.com (8.12.5/8.12.5) with ESMTP id i1CMQE9A033359; Fri, 13 Feb 2004 00:26:14 +0200 (IST) From: "Mustafa N. Deeb" To: "'Emre Bastuz'" , Date: Fri, 13 Feb 2004 01:30:51 +0200 Organization: Palnet Communications Ltd. Message-ID: <004e01c3f1c0$44224fa0$8d00000a@felfel> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2616 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: <1076622177.584b09df25514@webmail.emre.de> Subject: RE: 4.9-STABLE heavily dropping packets? libpcap issue? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Mustafa@palnet.com List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Feb 2004 22:28:45 -0000 You can start by doing "netstat -m" and take it from there ~~~~~~~~~~~~~~~~~~~~~~ Mustafa N. Deeb Technical Director Palnet Communications Ltd. Tel: +970-2-2403434 Fax: +970-2-2403430 www.palsms.com www.paltime.net www.palnet.com -----Original Message----- From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] On Behalf Of Emre Bastuz Sent: Thursday, February 12, 2004 11:43 PM To: freebsd-net@freebsd.org Subject: 4.9-STABLE heavily dropping packets? libpcap issue? Hi, for sniffing purposes I have a FreeBSD 4.9-STABLE box running on highend, state-of-the-art hardware (Xeon something) with all bells and whistles. The NIC=B4s an onboard copper em0 with gig-e capabilities. Nevertheless I am getting massive packet drops (40%-60%) when I start sniffing a gigabit ehthernet segment although the CPU load is very low. After doing some research in in the appropriate mailing list archives I found out that there are (or were?) sometimes issues with the libpcap. As there was a more current one in the ports collection (0.8.1 as opposed to 0.7 in the base system) I used this instead (with LIBPCAP_OVERWRITE_BASE=3Dyes) but = still I am losing the same amount of packets when doing a tcpdump. I definitly do _not_ know what else I can do to reduce the amount of lost data. *sigh* Things I did to improve the situation so far: - Update from RELEASE to 4.9-STABLE - Compile a custom kernel with reduced drivers and SMP support - Update libpcap and recompile tcpdump Does any of you have an idea else I can do? Any parameters in the kernel that can be tweeked further, like NMBCLUSTERS or NMBUFS? Cheers, Emre -- http://www.emre.de UIN: 561260 PGP Key ID: 0xAFAC77FD I don't see why some people even HAVE cars. -- Calvin ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. _______________________________________________ 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"