Followup: Losing time like crazy (1s short per 10s)

Martin S. Weber Ephaeton at
Tue Aug 16 12:04:58 UTC 2016

following up to :

On 2016-08-16 13:39:33, Martin S. Weber wrote:
> On 2016-08-16 12:33:47, Matthew Seaman wrote:
> > Could you open a PR with the information you've included in this mail
> > thread please?  
> done, #211897. I've included my dmesg and service -e output.

..and now my p7 dmesg as well as the p4 one, and a diff between the two,
which highlights two, peculiarities, as Matthew called them:

-FreeBSD 10.3-RELEASE-p4 #0: Sat May 28 12:23:44 UTC 2016
+FreeBSD 10.3-RELEASE-p7 #0: Thu Aug 11 18:38:15 UTC 2016
-CPU: Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz (4000.07-MHz K8-class CPU)
+CPU: Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz (4439.49-MHz K8-class CPU)
-Timecounter "TSC-low" frequency 2000036900 Hz quality 1000
+Timecounter "TSC-low" frequency 1109872466 Hz quality 1000

Not sure which I like better for the culprit, the 4439.49 MHz equals 4.0 Ghz
or the different timecounter frequencies. The former nicely corresponds with
the "10%" of time I lose.


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