cvs commit: src/sys/sys time.h src/sys/kern kern_time.c

[John Baldwin]

On Sunday 27 November 2005 08:35 am, Norikatsu Shigemura wrote:
> On Sun, 27 Nov 2005 13:23:00 +0000 (GMT)
>
> Robert Watson <rwatson at 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.

Erm, libwrapper only implements 2 of libc's functions, it's not a complete 
replacement. :)

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org