From owner-freebsd-current@FreeBSD.ORG Mon May 29 19:31:16 2006 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4A84316AA25 for ; Mon, 29 May 2006 19:31:16 +0000 (UTC) (envelope-from garyj@jennejohn.org) Received: from mail08b.verio.de (mail08b.verio.de [213.198.55.74]) by mx1.FreeBSD.org (Postfix) with SMTP id 592F943D53 for ; Mon, 29 May 2006 19:31:15 +0000 (GMT) (envelope-from garyj@jennejohn.org) Received: from mx13.stngva01.us.mxservers.net (204.202.242.69) by mail08b.verio.de (RS ver 1.0.95vs) with SMTP id 0-0178991065; Mon, 29 May 2006 21:31:13 +0200 (CEST) Received: from www.jennejohn.org [213.198.5.174] (EHLO peedub.jennejohn.org) by mx13.stngva01.us.mxservers.net (mxl_mta-1.3.8-10p4) with ESMTP id afb4b744.1941.009.mx13.stngva01.us.mxservers.net; Mon, 29 May 2006 15:31:06 -0400 (EDT) Received: from jennejohn.org (localhost [127.0.0.1]) by peedub.jennejohn.org (8.13.4/8.11.6) with ESMTP id k4TJUOjV082272; Mon, 29 May 2006 21:30:29 +0200 (CEST) (envelope-from garyj@jennejohn.org) Message-Id: <200605291930.k4TJUOjV082272@peedub.jennejohn.org> X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.0.4 To: Jeremie Le Hen In-Reply-To: Message from Jeremie Le Hen of "Mon, 29 May 2006 17:31:03 +0200." <20060529153103.GA17178@obiwan.tataz.chchile.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 29 May 2006 21:30:24 +0200 From: Gary Jennejohn X-Spam: [F=0.5108185126; heur=0.500(-19800); stat=0.510; spamtraq-heur=0.500(2006052901)] X-MAIL-FROM: X-SOURCE-IP: [213.198.5.174] X-Loop-Detect: 1 X-DistLoop-Detect: 1 Cc: freebsd-current@FreeBSD.org Subject: Re: timer goes sluggish X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 May 2006 19:31:16 -0000 Jeremie Le Hen writes: > IOW, using ACPI-fast as timecounter leads to have "sleep 1" actually > sleep for 6~7 seconds. Using TSC as timecounter is even weirder since it > desynchronize the computer's clock. > This isn't necessarily an accurate statement, as proved by this output on my machine: garyj:peedub:freebsd:-bash:23> sysctl kern.timecounter.hardware kern.timecounter.hardware: ACPI-fast garyj:peedub:freebsd:-bash:24> while : ; do date ; sleep 1 ; done Mon May 29 21:26:34 CEST 2006 Mon May 29 21:26:35 CEST 2006 Mon May 29 21:26:36 CEST 2006 Mon May 29 21:26:37 CEST 2006 Mon May 29 21:26:38 CEST 2006 Mon May 29 21:26:39 CEST 2006 Mon May 29 21:26:40 CEST 2006 Mon May 29 21:26:41 CEST 2006 Mon May 29 21:26:42 CEST 2006 and so on ad nauseum. No problem on my machine. Must be something specific to your set up. --- Gary Jennejohn / garyjATjennejohnDOTorg gjATfreebsdDOTorg garyjATdenxDOTde