linuxptp-users

[Linuxptp-users] newb question about clocks

[David B. <dbo...@gm...>]

phc2sys will synchronize the Linux CLOCK_REALTIME to PHC.  But what 
about CLOCK_MONOTONIC?  Will it adjust as a result of CLOCK_REALTIME 
being synchronized to PHC?  Will CLOCK_MONOTONIC slow or speed up to 
match PHC?

I'm using GStreamer for media playback and it uses CLOCK_MONOTONIC for 
its default system clock.  I'd like to have two GStreamer pipelines on 
two separate computers synchronized as close as possible.

Thanks,

David

Re: [Linuxptp-users] newb question about clocks

[Richard C. <ric...@gm...>]

On Mon, Sep 09, 2013 at 08:33:24PM -0500, David Bourgoyne wrote:
> phc2sys will synchronize the Linux CLOCK_REALTIME to PHC.  But what 
> about CLOCK_MONOTONIC?  Will it adjust as a result of CLOCK_REALTIME 
> being synchronized to PHC?  Will CLOCK_MONOTONIC slow or speed up to 
> match PHC?

Yes, CLOCK_MONOTONIC is syntonized (frequency locked) to
CLOCK_REALTIME by the kernel.

Thanks,
Richard