X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Tue, 14 Feb 2012 18:57:35 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: File operations really slow in emacs Message-ID: <20120214175735.GH25918@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <4F35C1E0.2020308@cs.utoronto.ca> <20120211101158.GC9823@calimero.vinschen.de> <4F3910B2.3070905@cs.utoronto.ca> <4F3A63AF.7010905@cs.utoronto.ca> <20120214135246.GA25918@calimero.vinschen.de> <4F3A7357.4010505@cs.utoronto.ca> <20120214151745.GD25918@calimero.vinschen.de> <4F3A81F8.80205@cs.utoronto.ca> <20120214162656.GE25918@calimero.vinschen.de> <4F3A9E01.7000500@cs.utoronto.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <4F3A9E01.7000500@cs.utoronto.ca> User-Agent: Mutt/1.5.21 (2010-09-15) 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 On Feb 14 12:46, Ryan Johnson wrote: > On 14/02/2012 11:26 AM, Corinna Vinschen wrote: > >On Feb 14 10:47, Ryan Johnson wrote: > >>On 14/02/2012 10:17 AM, Corinna Vinschen wrote: > >>>Does anybody know a system call which allows to fetch the network drive > >>>state (connected/not connected) without a billion microsecond timeout? > >>[...] > >>What if we parsed the mount table instead of calling readdir? I > >>don't know how that's computed, but it's never been a performance > >>problem, it only shows drives that are actually connected [...] > >What mount table? Cygwin's? It calls GetFileAttributes on the drive's > >root dir as well... > This is bizarre... what would cause calls to the same Windows API > function behave so differently when called by stat vs ls vs > bash-autocomplete? I'm happy to accept that there's some weirdness > on my box, but I would have expected that weirdness to be consistent > at any given instant in time (either all go slow or all behave > normally). SMB just is not consistent. More often than not the timing behaviour is just plain puzzeling. And, btw., in *my* testing I got hangs in mount as well if I disabled the remote share. But only once. Subsequent calls were fast. And after enabling the remote share, mount happily ignored that fact for about a minute or so. Caching, anybody? Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- 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