From owner-cvs-all@FreeBSD.ORG Sun Nov 27 13:41:35 2005 Return-Path: X-Original-To: cvs-all@FreeBSD.org Delivered-To: cvs-all@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3625D16A41F; Sun, 27 Nov 2005 13:41:35 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [209.31.154.42]) by mx1.FreeBSD.org (Postfix) with ESMTP id 35E9843D58; Sun, 27 Nov 2005 13:41:34 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from fledge.watson.org (fledge.watson.org [209.31.154.41]) by cyrus.watson.org (Postfix) with ESMTP id BBB1846B81; Sun, 27 Nov 2005 08:41:33 -0500 (EST) Date: Sun, 27 Nov 2005 13:41:33 +0000 (GMT) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Norikatsu Shigemura In-Reply-To: <20051127223509.8913eafe.nork@FreeBSD.org> Message-ID: <20051127133552.U81764@fledge.watson.org> References: <200511270055.jAR0tIkF032480@repoman.freebsd.org> <20051127005622.H81764@fledge.watson.org> <20051127234937.X28222@delplex.bde.org> <20051127131838.F81764@fledge.watson.org> <20051127223509.8913eafe.nork@FreeBSD.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, bde@zeta.org.au Subject: Re: cvs commit: src/sys/sys time.h src/sys/kern kern_time.c X-BeenThere: cvs-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the entire tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 27 Nov 2005 13:41:35 -0000 On Sun, 27 Nov 2005, Norikatsu Shigemura wrote: > On Sun, 27 Nov 2005 13:23:00 +0000 (GMT) > Robert Watson wrote: >>> time(3) should use the environment variable too, since the fast version >>> gives a value that is both imprecise and wrong. It inherits bugs from >>> the kernel's time_second variable. time_second is not the current time >>> truncated, but is the (current time less up to about tc_tick/HZ) >>> truncated. It lags the current time by more than 1 second for up to >>> about tc_tick/HZ seconds before every rollover of the correct truncated >>> time. >> Yes -- this is a mistake in the current library wrapper. All interfaces >> modified to be "fast" or "precise" should be controlled by the >> environmental variable so that testing is more consistent (i.e., other >> than wrapping costs, the non-configured version should behave identically >> to the non-wrapped version). > > I think that to use libmap.conf(5) is a best solution:-), if > someone want to use low resolution version. I didn't confirm > following setting: > > # All binaries use low resolution version on /usr/local/bin/ > [/usr/local/bin/] > libc.so.6 libwrapper.so.1 > > Of cource, you can use mysql only, and no more controll by > environment variable. In the general case -- i.e., if the wrapper were going to be for more than testing -- I'd agree. However, the wrapper is designed to support automated testing without dealing with system-wide configuration files. :-) For those wishing to pick up the latest wrapper code, it's in //depot/user/rwatson/clock/src/lib/libwrapper in Perforce. Robert N M Watson