From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Parkins Subject: Re: [PATCH] Add a 1-second sleep to git-cvsexportcommit test Date: Wed, 25 Jul 2007 08:35:19 +0100 Message-ID: <200707250835.21181.andyparkins@gmail.com> References: <7vk5ssqdy0.fsf@assigned-by-dhcp.cox.net> <200707241134.31950.robin.rosenberg.lists@dewire.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Cc: Linus Torvalds , Robin Rosenberg , "Simon 'corecode' Schubert" , Junio C Hamano , Jason Sewall , raa.lkml@gmail.com To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Wed Jul 25 09:35:57 2007 Return-path: Envelope-to: gcvg-git@gmane.org Received: from vger.kernel.org ([209.132.176.167]) by lo.gmane.org with esmtp (Exim 4.50) id 1IDbPZ-00026Q-9y for gcvg-git@gmane.org; Wed, 25 Jul 2007 09:35:57 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761341AbXGYHf3 (ORCPT ); Wed, 25 Jul 2007 03:35:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760144AbXGYHf2 (ORCPT ); Wed, 25 Jul 2007 03:35:28 -0400 Received: from ug-out-1314.google.com ([66.249.92.170]:28200 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761701AbXGYHf1 (ORCPT ); Wed, 25 Jul 2007 03:35:27 -0400 Received: by ug-out-1314.google.com with SMTP id j3so300649ugf for ; Wed, 25 Jul 2007 00:35:25 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:from:to:subject:date:user-agent:cc:references:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:message-id; b=mqU3tcqyigAT8g9UFeWOEYnTAzg3ZccujVk9aHTvFnPBJZ95dZ/s7cxOeeeLlH9YJII2pewXPE8xeQ33hqhmFyfZcgPorSlvDGqzAPjaAEpVZLutIPqJWQe7QCsnuyFd65QAAjjE/0KBoHe/jT8zl94BbI46Il/oCunK2GWt3SM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:from:to:subject:date:user-agent:cc:references:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:message-id; b=AK2Eb3zEnYVlSVsT+/b6rJNfVRf8Q9KCffWWfoO8/F4y3y5+byjBNjoQRWbryCBIUyAEYP8JEI96Po4Ba+MTu3thPe2LpuGv8ooX7rX0KwrTELrWufwTZscuL2WVY2JYP6QyGvomoYxE9GlmlNGtDDf9ro3LE250Zvnbk/D0Ib8= Received: by 10.67.97.18 with SMTP id z18mr1205058ugl.1185348925051; Wed, 25 Jul 2007 00:35:25 -0700 (PDT) Received: from dvr.360vision.com ( [194.70.53.227]) by mx.google.com with ESMTPS id b33sm748340ika.2007.07.25.00.35.23 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 25 Jul 2007 00:35:24 -0700 (PDT) User-Agent: KMail/1.9.7 In-Reply-To: Content-Disposition: inline Sender: git-owner@vger.kernel.org Precedence: bulk X-Mailing-List: git@vger.kernel.org Archived-At: On Tuesday 2007 July 24, Linus Torvalds wrote: > So if you sleep for one second, the filesystem times will update by one > second, but if you try to *synchronize* to exactly one second, it's not at > all certain that the *filesystem* clock will be synchronized to the same > second! Time skew is simply a fact of life. I think it's even worse; if memory serves one of the Windows file systems (spit) only stores times to a two-second resolution. So half the time, waiting for one second won't change the time stamp _at all_. Andy -- Dr Andy Parkins, M Eng (hons), MIET andyparkins@gmail.com