From owner-freebsd-net@FreeBSD.ORG Mon Dec 20 18:10:14 2010 Return-Path: Delivered-To: freebsd-net@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3A21110656E0 for ; Mon, 20 Dec 2010 18:10:14 +0000 (UTC) (envelope-from lev@serebryakov.spb.ru) Received: from ftp.translate.ru (ftp.translate.ru [80.249.188.42]) by mx1.freebsd.org (Postfix) with ESMTP id EB1D38FC08 for ; Mon, 20 Dec 2010 18:10:13 +0000 (UTC) Received: from lion.home.serebryakov.spb.ru (89.112.15.178.pppoe.eltel.net [89.112.15.178]) (Authenticated sender: lev@serebryakov.spb.ru) by ftp.translate.ru (Postfix) with ESMTPA id B278813DF5F for ; Mon, 20 Dec 2010 20:53:34 +0300 (MSK) Date: Mon, 20 Dec 2010 20:53:27 +0300 From: Lev Serebryakov X-Priority: 3 (Normal) Message-ID: <12810339411.20101220205327@serebryakov.spb.ru> To: freebsd-net@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=windows-1251 Content-Transfer-Encoding: quoted-printable Cc: Subject: E4500 spend one core to saturate 1Gbit/s link with TCP -- is it nornal? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Dec 2010 18:10:14 -0000 Hello, Freebsd-net. I have file server with Core2Duo E4500 CPU and Intel gigabit adapter (82566DM). FreeBSD 8-STABLE (8.2-PRERELEASE #1: Fri Dec 3 2010) and samba35-3.5.6 are installed. This server could serve about 110MiB/s to one client over CIFS, but one core of CPU is completely busy in such situation: about 60% of CPU is occuped by "ketnel" and 35-40% occuped bu "smbd" accroding to "top -S" ouput. Is it normal, that 2.2GHz core is needed to saturate 1Gib link with only one client (and one TCP connction), or I have something misconfigured? --=20 // Black Lion AKA Lev Serebryakov