Date: Fri, 13 Feb 2004 01:30:51 +0200 From: "Mustafa N. Deeb" <mustafa@palnet.com> To: "'Emre Bastuz'" <info@emre.de>, <freebsd-net@freebsd.org> Subject: RE: 4.9-STABLE heavily dropping packets? libpcap issue? Message-ID: <004e01c3f1c0$44224fa0$8d00000a@felfel> In-Reply-To: <1076622177.584b09df25514@webmail.emre.de>
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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"
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