From owner-freebsd-stable@FreeBSD.ORG  Tue Apr 12 18:47:58 2011
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 61EC5106564A
	for <freebsd-stable@freebsd.org>; Tue, 12 Apr 2011 18:47:58 +0000 (UTC)
	(envelope-from uqs@spoerlein.net)
Received: from acme.spoerlein.net (acme.spoerlein.net
	[IPv6:2a01:4f8:131:23c2::1])
	by mx1.freebsd.org (Postfix) with ESMTP id EC0798FC1D
	for <freebsd-stable@freebsd.org>; Tue, 12 Apr 2011 18:47:57 +0000 (UTC)
Received: from localhost (acme.spoerlein.net [IPv6:2a01:4f8:131:23c2::1])
	by acme.spoerlein.net (8.14.4/8.14.4) with ESMTP id p3CIke7e063361
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Tue, 12 Apr 2011 20:46:40 +0200 (CEST)
	(envelope-from uqs@spoerlein.net)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=spoerlein.net;
	s=dkim200908; t=1302634000;
	bh=bJJvJBAeKp9KXMDPEMUJcl1jCZnl42sTD/ulRGJN3l4=;
	h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:
	Content-Type:In-Reply-To;
	b=rPTgSpSDXSI/iTlT2GB7bvRwTxaZtits4yQgYo6gIfO13MPzaEf56QKwm6KyPDkyH
	EMdN8mGAnKBJJ8f6EKjeZkPt/UzrBPoR+hcg4LotZwkdzmgW0g7oXMt/3LHOmnTbFF
	RldnWaocUJDWW5Wt7A29STSkMAyeWqn+1vcLI3cI=
Date: Tue, 12 Apr 2011 20:46:40 +0200
From: Ulrich =?utf-8?B?U3DDtnJsZWlu?= <uqs@spoerlein.net>
To: Denny Schierz <linuxmail@4lin.net>
Message-ID: <20110412184639.GA85668@acme.spoerlein.net>
Mail-Followup-To: Denny Schierz <linuxmail@4lin.net>,
	freebsd-stable <freebsd-stable@freebsd.org>
References: <1302516039.3223.222.camel@pcdenny>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1302516039.3223.222.camel@pcdenny>
User-Agent: Mutt/1.5.21 (2010-09-15)
Cc: freebsd-stable <freebsd-stable@freebsd.org>
Subject: Re: Network throughput: Never =?utf-8?q?get_more_than_112MB/s_?=
 =?utf-8?b?w7xiZXI=?= two NICs
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 12 Apr 2011 18:47:58 -0000

On Mon, 11.04.2011 at 12:00:39 +0200, Denny Schierz wrote:
> hi,
> 
> after testing severals loadbalancing (LACP) types with Cisco, we saw,
> that we never get more than 112MB/s with two network cards and iperf. 
> 
> So, we tested without loadbalancing, 4 Clients (iperf -f M -c <ip>) and
> two target IPs. Every IP has his own 1Gb/s network card.
> On the end, two clients had a connection to IP 1 and the second two to
> IP 2.
> 
> First we used the two onboard NICs and then, one onboard and one
> external NIC, but without success. We never get more then 112MB/s
> 
> All are connected through a Cisco Catalyst WS-X4515.
> 
> The mainboard is a Intel S3420GP.

Are the NICs PCI or PCIe? If the former, IIRC the PCI bus bandwidth
maxes out at 133MB/s so that might explain your numbers. If your NICs are
PCIe, I have no helpful clues, sorry.

Uli