Date: Mon, 28 Nov 2005 08:45:34 -0500 From: John Baldwin <jhb@freebsd.org> To: Norikatsu Shigemura <nork@freebsd.org> Cc: cvs-src@freebsd.org, src-committers@freebsd.org, Robert Watson <rwatson@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 Message-ID: <200511280845.37903.jhb@freebsd.org> In-Reply-To: <20051127223509.8913eafe.nork@FreeBSD.org> References: <200511270055.jAR0tIkF032480@repoman.freebsd.org> <20051127131838.F81764@fledge.watson.org> <20051127223509.8913eafe.nork@FreeBSD.org>
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On Sunday 27 November 2005 08:35 am, Norikatsu Shigemura wrote: > On Sun, 27 Nov 2005 13:23:00 +0000 (GMT) > > Robert Watson <rwatson@freebsd.org> wrote: > > > time(3) should use the environment variable too, since the fast versi= on > > > 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 ti= me > > > 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 truncat= ed > > > 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 identical= ly > > 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. Erm, libwrapper only implements 2 of libc's functions, it's not a complete= =20 replacement. :) =2D-=20 John Baldwin <jhb@FreeBSD.org> =A0<>< =A0http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" =A0=3D =A0http://www.FreeBSD.org
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