[ntp:hackers] Non-monotonic time on NT

Terje Mathisen terje.mathisen at hda.hydro.com
Tue May 8 01:56:19 PDT 2007


hackers-bounces+terje.mathisen=hda.hydro.com at support.ntp.org wrote:
> So I agree with Peter that those steps might happen, but as Terje already 
> mentioned, this does not seem to cause any harm to ntpd with regard to 
> disciplining the system time. 
> 
> However, if ntpd acts as a time server, gettimeofday()is also used to fill in 
> the time stamps for the response packets to the clients, and so the time in 
> the response packets might step back (OK, this may also be filtered out at 
> the client side).

It is conceivable that some non-standard ntp implementation would croak 
if this happened, but the most likely results would be that nothing bad 
happens, except for a slightly bad poll result.

Terje
-- 
- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"


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