[ntp:questions] testing slew only mode (-x), not slewing correctly (linux sles10, ntpd v 4.1.1)

RedGrittyBrick RedGrittyBrick at spamweary.invalid
Mon Oct 26 16:12:22 UTC 2009


David Woolley wrote:
> Brian Utterback wrote:
>>
>> The interaction between the OS kernel and the RTC is platform and OS 
>> dependent. You should not assume that the RTC plays no role while the 
>> system is running.
> 
> Possibly, but the only OSes on which I've seen this interaction are 
> SunOS 4, and SCO Openserver, on both of which it breaks ntpd and should 
> be disabled to avoid frequent stepping.

I can only find SCO Technical Article 104234, referring to an RTC issue 
on SCO Unixen prior to OpenServer. Nothing for OpenServer.

I have NTP running on several OpenServer systems and apparently happily 
keeping time with pool.ntp.org servers with an offset of a few ms (at 
one location) and a few tens of ms (at another). This is good enough for 
my purposes.

No NTPD stepping is reported in the logs except once after each reboot, 
presumably because the RTC has been set incorrectly regarding DST.
# setclk -p
RTC 2009/10/26 16:03:38 DST
SYS 2009/10/26 16:03:36 STD  RTC-SYS=-3598

Can you provide a URL that refers to the issue you describe with an 
undesirable RTC interaction with NTPD on SCO OpenServer?

-- 
RGB




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