X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=1.8 required=5.0 tests=AWL,BAYES_00,BOTNET,KHOP_THREADED,RCVD_IN_DNSWL_NONE,RCVD_IN_HOSTKARMA_NO,RCVD_IN_HOSTKARMA_YE,TO_NO_BRKTS_PCNT X-Spam-Check-By: sourceware.org Message-id: <4F9A0FFB.4080201@cygwin.com> Date: Thu, 26 Apr 2012 23:18:19 -0400 From: "Larry Hall (Cygwin)" Reply-to: cygwin AT cygwin DOT com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20120327 Thunderbird/11.0.1 MIME-version: 1.0 To: cygwin AT cygwin DOT com Subject: Re: bad performance when opening many files on Win7 References: <874ns6z0cr DOT fsf AT Rainer DOT invalid> In-reply-to: <874ns6z0cr.fsf@Rainer.invalid> Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com On 4/26/2012 4:47 PM, Achim Gratz wrote: > > I've seen major performance regressions on Win7 compared to an pre-1.7 > Cygwin version on Win2000. I had initially suspected the virus scanner > and disabling the real-time scan for the whole Cygwin folder did improve > things appreciably. However the real performance hit when an > application opens or even just stats many files in succession (like Perl > is prone to at startup when it scans @INC) is still there. > > Superficially it looks like you get 100% load on one CPU and the > application is busy, but perfmon tells you that the application sits on > its thumbs and the CPU is eaten by lsass.exe (which doesn't have any > file open or any network connection). Eventually the application starts > doing what it is supposed to do, but lsass continues to eat CPU for a > few minutes. I'm not even sure there's if it only happens for Cygwin > applications, but for those I can reliably reproduce it. When I time > the application in Cygwin, I get something like less than a second user > time and over two minutes core time. > > If someone has seen something like that and maybe there is some setup > that I can tweak to avoid this it would be great to know. Here's some background. Anything there describe your setup? -- Larry _____________________________________________________________________ A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting annoying in email? -- 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