From owner-freebsd-net@FreeBSD.ORG Mon Dec 20 20:45:01 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 5C37A10656B4 for ; Mon, 20 Dec 2010 20:45:01 +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 150B48FC15 for ; Mon, 20 Dec 2010 20:45:01 +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 4CA1C13DF5F; Mon, 20 Dec 2010 23:45:00 +0300 (MSK) Date: Mon, 20 Dec 2010 23:44:53 +0300 From: Lev Serebryakov X-Priority: 3 (Normal) Message-ID: <1647893939.20101220234453@serebryakov.spb.ru> To: Eugene Grosbein In-Reply-To: <4D0FB1B1.7070703@rdtc.ru> References: <12810339411.20101220205327@serebryakov.spb.ru> <4D0FB1B1.7070703@rdtc.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=windows-1251 Content-Transfer-Encoding: quoted-printable Cc: freebsd-net@freebsd.org Subject: Re: 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 20:45:01 -0000 Hello, Eugene. You wrote 20 =E4=E5=EA=E0=E1=F0=FF 2010 =E3., 22:42:41: >> 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? > Compare with ftpd that uses sendfile() kernel function. simple "iperf" shows almost same load (slightly less, but it shows slightly less speed, about 800Mbit). --=20 // Black Lion AKA Lev Serebryakov