Re: Linux time code

[Jesse Barnes]

On Thursday, August 17, 2006 2:58 pm, john stultz wrote:
> On Thu, 2006-08-17 at 13:43 +0200, Roman Zippel wrote:
> > On Wed, 16 Aug 2006, john stultz wrote:
> > > > For example there is a POSIX-like sys_clock_gettime() intended
> > > > to server the end-user directly, but there's no counterpart
> > > > do_clock_gettime() to server any in-kernel needs.
> > >
> > > Hmmm.. ktime_get(), ktime_get_ts() and ktime_get_real(), provide
> > > this info. Is there something missing here?
> >
> > What is missing is the abiltity to map a clock to a posix clock, so
> > that you would have CLOCK_REALTIME/CLOCK_MONOTONIC as NTP controlled
> > clocks and other CLOCK_* as the raw clock.
>
> Is there a use case for this (wanting non-NTP corrected time on a
> system running NTPd) you have in mind?

Isn't this what CLOCK_MONOTONIC[_HR] is for?  It's not supposed to jump 
around at all, so the basic usage model is to use this source for 
timestamping purposes...

Jesse
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