From owner-freebsd-hackers@FreeBSD.ORG Fri Sep 13 23:50:56 2013 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 7F75BF5D; Fri, 13 Sep 2013 23:50:56 +0000 (UTC) (envelope-from sfourman@gmail.com) Received: from mail-vc0-x230.google.com (mail-vc0-x230.google.com [IPv6:2607:f8b0:400c:c03::230]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id AE58024DF; Fri, 13 Sep 2013 23:50:55 +0000 (UTC) Received: by mail-vc0-f176.google.com with SMTP id lf11so1477854vcb.35 for ; Fri, 13 Sep 2013 16:50:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=v+1K+CJy8FST36tLGRI1CopeWdhZIx7Suv24TJlXZrM=; b=g/b01xY6i+diDvG6LVOFtHGVgdT7+E8zNQUgDXY1AsBTKvepoYfhQ9v0/fH30G3+5q uZyXq/Yp2p4lcKeGcsGTTME0a9BexzNatw/Unmp5HbFbDPsgKvILeN0xrcyUhCb7Y7Mh /aZfU+E8w8MiutITXjHfnmVI1G/i2+iVmKB7pkaOPGl5nxjrJaeAiFWyC66ZuZOPpJTQ msGuo9cwQ9V2gd6iiuld+7+PYWq8dNIinCYlgKgLi3B9e6mvFFmCTVe0NF0j91fYRgRh 2ThzkZb+tm88RJ+GbzxziK6o5SeJM/+jY9FdZmvuRJyIwcezz+6yg9t5vxj9TyN2DkuF 2Srg== MIME-Version: 1.0 X-Received: by 10.58.137.167 with SMTP id qj7mr14239382veb.1.1379116254223; Fri, 13 Sep 2013 16:50:54 -0700 (PDT) Received: by 10.220.96.78 with HTTP; Fri, 13 Sep 2013 16:50:54 -0700 (PDT) In-Reply-To: <221093226.23439826.1379112203059.JavaMail.root@uoguelph.ca> References: <6BDA4619-783C-433E-9819-A7EAA0BD3299@neville-neil.com> <221093226.23439826.1379112203059.JavaMail.root@uoguelph.ca> Date: Fri, 13 Sep 2013 19:50:54 -0400 Message-ID: Subject: Re: Network stack changes From: "Sam Fourman Jr." To: Rick Macklem X-Mailman-Approved-At: Sat, 14 Sep 2013 11:18:28 +0000 Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: "Alexander V. Chernikov" , Luigi Rizzo , Andre Oppermann , freebsd-hackers@freebsd.org, George Neville-Neil , freebsd-arch@freebsd.org, Adrian Chadd , "Andrey V. Elsukov" , Gleb Smirnoff , FreeBSD Net X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Sep 2013 23:50:56 -0000 > > And any time you increase latency, that will have a negative impact on > NFS performance. NFS RPCs are usually small messages (except Write requests > and Read replies) and the RTT for these (mostly small, bidirectional) > messages can have a significant impact on NFS perf. > > rick > > this may be a bit off topic but not much... I have wondered with all of the new tcp algorithms http://freebsdfoundation.blogspot.com/2011/03/summary-of-five-new-tcp-congestion.html what algorithm is best suited for NFS over gigabit Ethernet, say FreeBSD to FreeBSD. and further more would a NFS optimized tcp algorithm be useful? Sam Fourman Jr.