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Re: [PATCH v3 1/4] Add correlated clocksource deriving system time from an auxiliary clocksource

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On Fri, Sep 04, 2015 at 03:02:19PM +0200, Thomas Gleixner wrote:
> > For example, supply the ART value as an argument and, in the case of
> > the realtime clock, keep a short history of clock changes.  It would
> 
> It's not only clock realtime which is affected by those.
> 
> > fail in cases where there are a lot of calls to adjtimex(),
> 
> That has nothing to do with lots of adjtimex calls. The kernel does a
> slow correction of the conversion values itself to avoid time jumping
> around.

I think what they're getting at is asking if there's a rate limit to
time adjustments, without that, saving the last n transition points will
still not cover any given length of history.

So what I think they're looking for; is given an upper bound on the DSP
delaying its data, come up with a fixed minimal amount of transitions
points we must store to cover the history.


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[PATCH v3 1/4] Add correlated clocksource deriving system time from an auxiliary clocksource "Christopher S. Hall" <christopher.s.hall@intel.com> - 2015-08-22 04:00 +0200
  Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Thomas Gleixner <tglx@linutronix.de> - 2015-08-22 22:20 +0200
    RE: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource "Hall, Christopher S" <christopher.s.hall@intel.com> - 2015-09-04 01:30 +0200
      Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Richard Cochran <richardcochran@gmail.com> - 2015-09-04 10:20 +0200
        Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Peter Zijlstra <peterz@infradead.org> - 2015-09-04 16:30 +0200
          RE: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource "Hall, Christopher S" <christopher.s.hall@intel.com> - 2015-09-04 23:20 +0200
      RE: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Thomas Gleixner <tglx@linutronix.de> - 2015-09-04 15:10 +0200
        Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Peter Zijlstra <peterz@infradead.org> - 2015-09-04 17:20 +0200
          Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Richard Cochran <richardcochran@gmail.com> - 2015-09-04 17:20 +0200
            Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Peter Zijlstra <peterz@infradead.org> - 2015-09-04 17:50 +0200
              Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Thomas Gleixner <tglx@linutronix.de> - 2015-09-04 18:40 +0200
                RE: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource "Hall, Christopher S" <christopher.s.hall@intel.com> - 2015-09-04 23:10 +0200
                RE: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Thomas Gleixner <tglx@linutronix.de> - 2015-09-05 10:50 +0200
                Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Ingo Molnar <mingo@kernel.org> - 2015-09-05 12:10 +0200
        Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource Richard Cochran <richardcochran@gmail.com> - 2015-09-04 17:40 +0200
      Re: [PATCH v3 1/4] Add correlated clocksource deriving system time  from an auxiliary clocksource John Stultz <john.stultz@linaro.org> - 2015-09-05 00:00 +0200

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