If you want to get a clock error estimate from within the kernel, what
do you want to use as your reference clock?
The NTP error estimate is based on clock skew, which requires two
clocks. It would appear that this would require porting an NTP (or
other protocol to query remote clocks) client into kernel space or
else writing some user-space code to implement/utilize an NTP client
and pass the information to the kernel. Jitter between the CPU clock
and the BIOS clock is not sufficient for this purpose.
-Karl
On Fri, 7 Jan 2005 13:26:31 -0800, Sean Peisert <email@hidden> wrote:
> > >> I was wondering if there is a way to get the current time of the day
> > >> it is on the system from
> > >> within a kernel extension I am writing.
> > >
> > > You can follow the code for gettimeofday() and just call
>
> Is there an equivalent to this for getting the error estimate that
> ntp_adjtime() gives?
>
> --
> Sean Peisert
> http://www.sdsc.edu/~peisert/
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