Re: Chrony not taking SOCKET data from Application

Emmanuel Fusté <[email protected]>
Newsgroups gmane.comp.time.chrony.user
Message-ID <[email protected]>
Le 28/06/2023 à 19:19, Bill Unruh a écrit :
> Why would you be using makestep if the difference were more than 
> 100ns. That
> both seems extreme and totally subverts the action of chrony. Chrony is
> designed to correct the system clock to the best estimate of the true 
> time and
> rate. Makestep ruins that, especially the rate estimate. Nothing can 
> control
> the clock to 100ns unless you have very special hardware. 100ns is 
> less than
> 100 ft of cable, and needs very special impedance matching to attain.

The main problem is not the cable, but the system himself : bus latency, 
irq latency etc...
You're right : very special hardware is needed to reach less than 100ns 
measurement induced error/system clock tracking.

Emmanuel.

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