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Date:      Tue, 16 Aug 2016 14:04:54 +0200
From:      "Martin S. Weber" <Ephaeton@gmx.net>
To:        Matthew Seaman <matthew@FreeBSD.org>, freebsd-questions@freebsd.org
Subject:   Followup: Losing time like crazy (1s short per 10s)
Message-ID:  <20160816120454.GD1241@hephaistos.local>
In-Reply-To: <20160816113933.GB1241@hephaistos.local>
References:  <20160816112002.GA3083@hephaistos.local> <20160816112714.GA1241@hephaistos.local> <d663a118-6ca3-fc1d-abe8-0da66b232fdf@FreeBSD.org> <20160816113933.GB1241@hephaistos.local>

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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.

Regards,
-Martin



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