From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2936 invoked by alias); 4 Dec 2011 19:29:34 -0000 Received: (qmail 2928 invoked by uid 22791); 4 Dec 2011 19:29:33 -0000 X-SWARE-Spam-Status: No, hits=-1.9 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_NONE X-Spam-Check-By: sourceware.org Received: from mho-02-ewr.mailhop.org (HELO mho-02-ewr.mailhop.org) (204.13.248.72) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sun, 04 Dec 2011 19:29:18 +0000 Received: from pool-173-76-42-41.bstnma.fios.verizon.net ([173.76.42.41] helo=cgf.cx) by mho-02-ewr.mailhop.org with esmtpa (Exim 4.72) (envelope-from ) id 1RXHkT-0009Vq-NA for cygwin@cygwin.com; Sun, 04 Dec 2011 19:29:17 +0000 Received: from localhost (ednor.casa.cgf.cx [192.168.187.5]) by cgf.cx (Postfix) with ESMTP id 98A1013C0D3 for ; Sun, 4 Dec 2011 14:29:17 -0500 (EST) X-Mail-Handler: MailHop Outbound by DynDNS X-Report-Abuse-To: abuse@dyndns.com (see http://www.dyndns.com/services/mailhop/outbound_abuse.html for abuse reporting information) X-MHO-User: U2FsdGVkX1/qtcTCveeip+EUSvuvnF0+ Date: Sun, 04 Dec 2011 19:29:00 -0000 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: Machine very sluggish while compiling Message-ID: <20111204192917.GB21203@ednor.casa.cgf.cx> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <4ECEE88E.5050307@cs.utoronto.ca> <20111125154751.GP28395@trikaliotis.net> <4EDB2761.6040508@cs.utoronto.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4EDB2761.6040508@cs.utoronto.ca> User-Agent: Mutt/1.5.20 (2009-06-14) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com X-SW-Source: 2011-12/txt/msg00060.txt.bz2 On Sun, Dec 04, 2011 at 02:55:13AM -0500, Ryan Johnson wrote: >On 25/11/2011 10:47 AM, Spiro Trikaliotis wrote: >> Hello, >> >> * On Thu, Nov 24, 2011 at 07:59:58PM -0500 Ryan Johnson wrote: >> >>> Lately I've noticed that running make -j4 on my quad-core win7-x64 >>> machine causes it to become sluggish or even unresponsive. >> I have seen very similar effects on my Win7-64 box. I can force the >> problem here just be running "ccrypt", though, I do not need to use "make >> -j4". >> >> I assume it has to do with the Windows 64 bit problems of Cygwin (search >> the ML archives for that). >> >> For me, this is the first machine since years where I do not use Cygwin >> because of this issue. >Update: I hit the problem again, this time running python, and the >problem is repeatable with the native 64-bit windows python interpreter. >It looks like cygwin doesn't cause the problem, but rather my high-cpu >tasks tend to run under cygwin. Honestly, I wouldn't expect cygwin to be >the cause, given that it's a user space only piece of software! > >Now what other entity could be the cause, I haven't a clue... process >explorer doesn't show anything. Maybe that's because it's frozen along >with the rest of the world during these episodes; right as it comes back >I see context switch deltas above 100k for the interrupt/DPC module, >which suggests I've got a wonky driver somewhere. Out of curiousity, is the current snapshot any better? I just found a case where Cygwin could essentially enter a tight loop while waiting for I/O. It would seem to be working correctly but it would use a lot of CPU time. cgf -- 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