From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#12430: Glitches caused by addition of psec to timers Date: Fri, 14 Sep 2012 09:32:43 +0300 Message-ID: <83ligdunas.fsf@gnu.org> References: <50517770.6080207@cs.ucla.edu> <83wqzxvp0x.fsf@gnu.org> <50522A90.2080208@cs.ucla.edu> <83obl9vig0.fsf@gnu.org> <505235F3.3080909@cs.ucla.edu> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1347604398 18221 80.91.229.3 (14 Sep 2012 06:33:18 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 14 Sep 2012 06:33:18 +0000 (UTC) Cc: 12430@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Sep 14 08:33:22 2012 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TCPSq-0002HT-LC for geb-bug-gnu-emacs@m.gmane.org; Fri, 14 Sep 2012 08:33:20 +0200 Original-Received: from localhost ([::1]:51671 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TCPSm-0003ki-UD for geb-bug-gnu-emacs@m.gmane.org; Fri, 14 Sep 2012 02:33:16 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:53469) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TCPSj-0003kL-SL for bug-gnu-emacs@gnu.org; Fri, 14 Sep 2012 02:33:14 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TCPSd-0007xo-55 for bug-gnu-emacs@gnu.org; Fri, 14 Sep 2012 02:33:13 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:51508) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TCPSd-0007xk-20 for bug-gnu-emacs@gnu.org; Fri, 14 Sep 2012 02:33:07 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TCPTW-0007CX-7K for bug-gnu-emacs@gnu.org; Fri, 14 Sep 2012 02:34:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 14 Sep 2012 06:34:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12430 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: patch Original-Received: via spool by 12430-submit@debbugs.gnu.org id=B12430.134760440827641 (code B ref 12430); Fri, 14 Sep 2012 06:34:02 +0000 Original-Received: (at 12430) by debbugs.gnu.org; 14 Sep 2012 06:33:28 +0000 Original-Received: from localhost ([127.0.0.1]:32821 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TCPSy-0007Bm-6n for submit@debbugs.gnu.org; Fri, 14 Sep 2012 02:33:28 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:58554) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TCPSv-0007Be-Fi for 12430@debbugs.gnu.org; Fri, 14 Sep 2012 02:33:25 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0MAB00800U2FAZ00@a-mtaout22.012.net.il> for 12430@debbugs.gnu.org; Fri, 14 Sep 2012 09:32:29 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MAB007DBU64UNA0@a-mtaout22.012.net.il>; Fri, 14 Sep 2012 09:32:29 +0300 (IDT) In-reply-to: <505235F3.3080909@cs.ucla.edu> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:64266 Archived-At: > Date: Thu, 13 Sep 2012 12:37:23 -0700 > From: Paul Eggert > CC: monnier@iro.umontreal.ca, 12430@debbugs.gnu.org > > On 09/13/2012 12:19 PM, Eli Zaretskii wrote: > > > Not with correct programs that _want_ the sub-microsecond resolution. > > I don't see how rounding errors could be avoided. As a trivial example, if I > write '0.001' in Emacs Lisp, I get a number slightly bigger than 0.001 > due to rounding error, so the underlying OS primitives (which always > get the ceiling of the delay request) would see two nanoseconds rather > than the one that I wanted. OK, so it's only a nanosecond off, but > the point is that Emacs shouldn't be munging the low-order > bits of users' requests. I will remember that when I write a hard-realtime application in Emacs Lisp.