X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-0.2 required=5.0 tests=AWL,BAYES_50,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org To: cygwin@cygwin.com Subject: Re: socket performance References: <95814509-4E08-44C6-8E59-026225EC0FF5@playsafesa.com> <4F04613B.6050505@gmail.com> <20120109134311.GH15470@calimero.vinschen.de> From: ht@inf.ed.ac.uk (Henry S. Thompson) Date: Tue, 10 Jan 2012 07:22:39 +0000 In-Reply-To: <20120109134311.GH15470@calimero.vinschen.de> (Corinna Vinschen's message of "Mon, 9 Jan 2012 14:43:11 +0100") Message-ID: User-Agent: Gnus/5.1008 (Gnus v5.10.8) XEmacs/21.4.21 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Edinburgh-Scanned: at nougat.ucs.ed.ac.uk with MIMEDefang 2.60, Sophie, Sophos Anti-Virus, Clam AntiVirus X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Corinna Vinschen writes: > it's nice to know that you could increase the performance by increasing > the buffer sizes. However, I'm reluctant to implement this as a generic > option. As far as I know the socket buffers are taken from nonpaged pool, > so generically using 2 Meg buffers will take a lot of precious resources. And contribute to bufferbloat problems [1] [2] elsewhere! ht [1] http://queue.acm.org/detail.cfm?id=2076798 [2] http://queue.acm.org/detail.cfm?id=2071893 -- Henry S. Thompson, School of Informatics, University of Edinburgh 10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/ [mail from me _always_ has a .sig like this -- mail without it is forged spam] -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple