From owner-freebsd-questions@FreeBSD.ORG  Sun Apr 13 12:07:41 2008
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 7C680106566C
	for <freebsd-questions@freebsd.org>;
	Sun, 13 Apr 2008 12:07:41 +0000 (UTC)
	(envelope-from yonyossef.lists@gmail.com)
Received: from yw-out-2324.google.com (yw-out-2324.google.com [74.125.46.31])
	by mx1.freebsd.org (Postfix) with ESMTP id 330768FC25
	for <freebsd-questions@freebsd.org>;
	Sun, 13 Apr 2008 12:07:41 +0000 (UTC)
	(envelope-from yonyossef.lists@gmail.com)
Received: by yw-out-2324.google.com with SMTP id 2so444733ywt.13
	for <freebsd-questions@freebsd.org>;
	Sun, 13 Apr 2008 05:07:40 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type;
	bh=zIJUk2AHopIfZV9Sk3TYGgnlcrx9TIfkuB3tQox2SHY=;
	b=JfYH63w1WG11/dXJXvVgFoE3ol3vhnWboc7H2WQ/PPIwh/ZWl/LYbvGgDqluEq1EIGtHTvIydt4vkY0ROw05Mkd3M4aReHMW01CwqTqWwVDBhSwlx3tPs/FMVjsvOsIK2K1IE32hQppm3MmPcRYLjNqyMavXPx6cI0J8hw7nPV0=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=message-id:date:from:to:subject:mime-version:content-type;
	b=BDlJKU3yGSGdHM5R3d5gdyQIXxl778E2NCsY18qX3fqTz1qamA1X9sXcgqwoB95MoJZgkOD9MtUDRdVIpJpRNtEMt4R+wuD+Ln9Ju5Hsapu//qWPWHA4mDUA2KO87motlfqsxfMSPATeowAQE3SzyDl+NibZU7pYufDbsky5kZk=
Received: by 10.151.82.3 with SMTP id j3mr5109969ybl.57.1208088460246;
	Sun, 13 Apr 2008 05:07:40 -0700 (PDT)
Received: by 10.151.12.5 with HTTP; Sun, 13 Apr 2008 05:07:40 -0700 (PDT)
Message-ID: <20def4870804130507r3f44ac4ah4ac981d987c3a3cf@mail.gmail.com>
Date: Sun, 13 Apr 2008 15:07:40 +0300
From: "Mr Y" <yonyossef.lists@gmail.com>
To: freebsd-questions@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Subject: tcp tuning and oprofile
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 13 Apr 2008 12:07:41 -0000

Hello,

I'm trying to improve my 10GigE driver performance on FreeBSD 6.3.
till now I found the following tcp parameters and set them:
# sysctl net.inet.tcp.sack.enable=0
# sysctl kern.ipc.maxsockbuf=16777216
is there anything else I should think about regarding tcp parameters?

2nd question:

I'm getting quite a high cpu utilization, about 75% for an iperf test.
I'm looking for a tool such as oprofile that will help me find the problem.
does anybody know something like that?

Thanks,
-Yony