[ntp:questions] Re: Ntp-4.1.2: tinker step 0;always slew and kernel time discipline

David L. Mills mills at udel.edu
Fri Feb 18 02:29:50 UTC 2005


Nikolaev,

Further to your qeestion. The kernel enable flag will show anyway, as 
the kernel is in fact actually called if the correction is less than 0.5 s.

Dave

Nikolaev, Sergey wrote:

> The "-x" option sets "tinker step 600". The description of the "-x"
> option includes a note about the fact that the kernel time discipline is
> disabled with this option. However, I tested it and "ntpdc -c sysinfo"
> still shows the "kernel" flag. So, my question applies to the "-x"
> option as well.
> 
> Sergey
> 
> -----Original Message-----
> From: questions-bounces at lists.ntp.isc.org
> [mailto:questions-bounces at lists.ntp.isc.org] On Behalf Of Tom Smith
> Sent: Thursday, February 17, 2005 1:52 PM
> To: questions at lists.ntp.isc.org
> Subject: [ntp:questions] Re: Ntp-4.1.2: tinker step 0;always slew and
> kernel time discipline
> 
> 
> Nikolaev, Sergey wrote:
> 
>>We have a requirement to always slew the clock even if it means long 
>>periods of time to correct the offset.
>>
>>The NTP documentation mentions this tinker option:
>>
>>step step
>>The argument is the step threshold, by default 0.128 s. It can be set
> 
> to any positive number in seconds. If set to zero, step adjustments will
> never occur. 
> 
>>Note: The kernel time discipline is disabled if the step threshold is
> 
> set to zero or greater than the default.
> 
>>However when I set "tinker step 0" and restart ntpd, I see in "ntpdc 
>>-c sysinfo" that the kernel flag is still enabled. Obviously, it is 
>>not disabled automaticly just by setting "tinker step 0".
>>
>>Do I need to disable it explicitly?
>>
>>Thanks in advance,
>>Sergey
>>
> 
> 
> Not a direct answer to your question, but it sounds like what you really
> want to do is instead start ntpd with the "-x" flag.
> 
> -Tom
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