rpi3 clock drift

[Per Hedeland]

On 2019-11-27 00:17, Stefan Parvu wrote:
> 
>>
>> Can someone else with an rpi3 (which keeps good time) confirm that
>> that's the usual number?
> 
> 
> this is slightly different model: rpi3+ . I think it does use a different SOC than rpi3.
> 
> krmx at k1:~ % sysctl kern.timecounter
> kern.timecounter.fast_gettime: 1
> kern.timecounter.tick: 1
> kern.timecounter.choice: ARM MPCore Timecounter(1000) dummy(-1000000)
> kern.timecounter.hardware: ARM MPCore Timecounter
> kern.timecounter.alloweddeviation: 5
> kern.timecounter.stepwarnings: 0
> kern.timecounter.tc.ARM MPCore Timecounter.quality: 1000
> kern.timecounter.tc.ARM MPCore Timecounter.frequency: 19200000
> kern.timecounter.tc.ARM MPCore Timecounter.counter: 3645432288
> kern.timecounter.tc.ARM MPCore Timecounter.mask: 4294967295

The same on what is a 3B w/o '+' AFAIR, keeping very good time:

pi3 2> sysctl kern.timecounter
kern.timecounter.fast_gettime: 1
kern.timecounter.tick: 1
kern.timecounter.choice: ARM MPCore Timecounter(1000) dummy(-1000000)
kern.timecounter.hardware: ARM MPCore Timecounter
kern.timecounter.alloweddeviation: 5
kern.timecounter.stepwarnings: 0
kern.timecounter.tc.ARM MPCore Timecounter.quality: 1000
kern.timecounter.tc.ARM MPCore Timecounter.frequency: 19200000
kern.timecounter.tc.ARM MPCore Timecounter.counter: 27058350
kern.timecounter.tc.ARM MPCore Timecounter.mask: 4294967295

and

pi3 3> cat /var/db/ntp/ntpd.drift
-5.333

pi3 4> uname -a
FreeBSD pi3.hedeland.org 12.0-STABLE FreeBSD 12.0-STABLE r345358 GENERIC  arm64

--Per Hedeland