X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-1.5 required=5.0 tests=AWL,BAYES_00,J_CHICKENPOX_54,SPF_PASS X-Spam-Check-By: sourceware.org Message-ID: <20090730235347.47286.qmail@web3301.mail.ogk.yahoo.co.jp> Date: Fri, 31 Jul 2009 08:53:47 +0900 (JST) From: Tatsuro MATSUOKA Reply-To: matsuoka@nuce.nagoya-u.ac.jp Subject: Re: How cygwin realize posix pipe? To: Haojun Bao , cygwin@cygwin.com In-Reply-To: <7v1vny2sjg.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-2022-jp 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 Hello --- Haojun Bao wrote: > > So one of your program is native and the other cygwin. > > It's like a similar issue I met when using native Emacs+Gnus and cygwin > programs (openssl client) to read imap mails, it is very slow. > > I guess it was a pipe size issue, for old DOS compatibility, the pipe > buffer is 64K, and if I check the i/o rate of openssl with Procexp, I > can see something like 64K. > > This is a very wild guess though. First I see sth. in Procexp to be > about 64K, then I googled with "windows pipe 64k". Maybe you can try > tweak the pipe buffer size. > Thank you for your kind advises. Tatsuro -------------------------------------- Power up the Internet with Yahoo! Toolbar. http://pr.mail.yahoo.co.jp/toolbar/ -- 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