Robert Gubler wrote:
> Hello,
>
> I'd like to synchronize CLOCK_REALTIME between some computers that share an
> Ethernet switch. I am using RTNet as my networking stack. My approach
> right now is very simplistic. I have a central server that will be sending
> out one 1 packet per second, with its struct timespec it got as a result of
> calling clock_gettime(CLOCK_REALTIME,...). The computers listening for this
> packet would then call clock_settime(CLOCK_REALTIME,..).
>
> In the Xenomai POSIX skin API doc it says clock_settime() isn't supported.
> Is there a recommended approach to accomplishing this? I am using Xenomai
> 2.4-rc4.
clock_settime IS supported by Xenomai 2.4, where does it still say in
the doc that it is not supported ?
However clock_settime is a costly service since it walks the system
timers list to recompute their expiration date, so calling it often may
not be a good idea.
Also note that xenomai CLOCK_REALTIME clock is set to the value of Linux
CLOCK_REALTIME clock on system startup, but then does not follow the
corrections made by ntp, which means that it drifts if you compare them.
--
Gilles Chanteperdrix.
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