Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm 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 Date: Thu, 3 Mar 2005 12:31:01 -0500 From: Christopher Faylor To: cygwin AT cygwin DOT com Subject: Re: Slow pipes after upgrade cygwin 1.5.12-1->1.5.13-1 when running boinc Message-ID: <20050303173101.GC3414@trixie.casa.cgf.cx> Reply-To: cygwin AT cygwin DOT com References: <1366 DOT 130 DOT 240 DOT 136 DOT 220 DOT 1109870804 DOT squirrel AT 130 DOT 240 DOT 136 DOT 220> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1366.130.240.136.220.1109870804.squirrel@130.240.136.220> User-Agent: Mutt/1.4.1i On Thu, Mar 03, 2005 at 06:26:44PM +0100, Bengt-Arne Fjellner wrote: >Christopher Faylor skrev: >> On Thu, Mar 03, 2005 at 05:36:00PM +0100, Bengt-Arne Fjellner wrote: >>>With boinc running einstein AT home at lowest priority ( uses 100% cpu but yields >>> easily) >>>simple pipes takes a long time. >>>Example: from a bash prompt >>>echo hello|grep -v xyz >>>with boinc running and 1.5.13-1 takes about 7 seconds. if i stop boinc >>>it takes parts of a second. after downgrade to 1.5.12-1 with boinc >>>running: parts of a second. >>> >>>i have seen this on two different computers one HT one normal. >>> >>>Single commands are still fast. >> >> Is there some reason why you'd expect us to know what "boinc" is? > >My stupidity i think... >Really its a community infrastructure for networked computing >"Berkeley Open Infrastructure for Network Computing" >http://boinc.berkeley.edu/ > >With currently this subproject running: >Einstein AT Home >http://einstein.phys.uwm.edu/ >Dont know if any other subprojects are affected. If I had to guess, I'd say that boinc is putting itself into a high priority class for some reason and is eating cpu cycles, causing cygwin's pipe reading code to stall. I've made a change to cygwin to put it's pipe reading code into a slightly higher priority class. This change is in the latest snapshot: http://cygwin.com/snapshots/ cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/