Puzzling clock offset spikes - update 2

Paul Theodoropoulos paul at anastrophe.com
Sun Jul 8 21:07:00 UTC 2018

On 7/8/2018 13:43 PM, Gary E. Miller wrote:
> Yo Paul!
> I just measured a RasPi3 B+ with Uputronics V1 HAT.  I just got 1 Watt
> (0.5 Amp).  With ethernet, WiFi off.  Room temp.
> I wonder when taht changed?
Not running ntpheat, I presume?
>> I'm slightly worried my MicroSD may be going, so I have a
>> couple more on the way.
> I go through a lot of them.
I've read that f2fs is "better" for sd cards than ext4. Yet another 
contemplation with research to go...
> Odd.  I do not have the problem.  Gentoo resets the clock on boot to
> the last time on the file system.
Ah, I just remembered, and checked - I had disabled fake-hwclock (which 
does the same), as I was testing out the gpsinit set_system_clock 
command. Which obviously kicks in too late in the startup sequence. 
Another thing to investigate.
> I'm much more interested in the stats below the png.  Minimum, maximum,
> standard deviation, etc.  Hard to eyeball small chnages in the graphs.
Yep - I'm trying to keep my filthy hands off the whole shebang for a 
while in hopes of better stats becoming visible soon.

Paul Theodoropoulos

More information about the users mailing list