From owner-freebsd-stable@FreeBSD.ORG Thu May 29 20:47:48 2008 Return-Path: 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 6E6321065678 for ; Thu, 29 May 2008 20:47:48 +0000 (UTC) (envelope-from andrew@modulus.org) Received: from email.octopus.com.au (host-122-100-2-232.octopus.com.au [122.100.2.232]) by mx1.freebsd.org (Postfix) with ESMTP id 165698FC0C for ; Thu, 29 May 2008 20:47:41 +0000 (UTC) (envelope-from andrew@modulus.org) Received: by email.octopus.com.au (Postfix, from userid 1002) id 54C1317D9A; Fri, 30 May 2008 06:47:40 +1000 (EST) X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on email.octopus.com.au X-Spam-Level: X-Spam-Status: No, score=-1.4 required=10.0 tests=ALL_TRUSTED autolearn=failed version=3.2.3 Received: from [119.11.34.115] (unknown [119.11.34.115]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: admin@email.octopus.com.au) by email.octopus.com.au (Postfix) with ESMTP id C038E17350; Fri, 30 May 2008 06:47:35 +1000 (EST) Message-ID: <483F165C.6030709@modulus.org> Date: Fri, 30 May 2008 06:47:24 +1000 From: Andrew Snow User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) MIME-Version: 1.0 To: freebsd-stable@freebsd.org References: <483EBCDD.2070408@tzim.net> In-Reply-To: <483EBCDD.2070408@tzim.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Arnaud Houdelette Subject: Re: Bad TCP performance with large MTU on 7-stable. X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 May 2008 20:47:48 -0000 Arnaud Houdelette wrote: > I also tried with tso disabled. Same results. Is it related to the re(4) > driver ? Or to the TCP stack ? Having used em driver with 7-RELEASE and 7-STABLE, I can assure you that large MTU size (9100) works well and gives 100mb/s transfer rates easily. So I can only conclude it is releated to the re driver. - Andrew