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Date: Sun, 27 Nov 2005 22:35:09 +0900
From: Norikatsu Shigemura <nork@FreeBSD.org>
To: Robert Watson <rwatson@FreeBSD.org>
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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
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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 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.