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Date: Sat, 13 Jul 2013 01:52:32 -0400
From: Kurt Lidl <lidl@pix.net>
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To: Peter Grehan <grehan@freebsd.org>
Subject: Re: calcru runtime went backwards
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On 7/8/13 11:54 PM, Peter Grehan wrote:
> Hi Kurt,
>
>> CPU: Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz (2300.13-MHz K8-class CPU)
>
>   Looks like this Sandy Bridge has turbo-boost. First step is to disable
> that in the BIOS and see if that has any effect.
>
>   How many vCPUs in the guest ?

I was finally able to do this.  I turned off the Turbo-Boost in the
BIOS, and restarted everything.

My virtual machine is configured with 4 cpus and 10240 (10GB) of memory.

I got the same error today when compiling python in the virtual machine:

calcru: runtime went backwards from 48142872748812902 usec to 593237864 
usec for pid 73714 (make)
calcru: runtime went backwards from 48142872748812902 usec to 593157552 
usec for pid 73714 (make)

Looking at the console log, I also found the following on the console 
when it was booting:
calcru: runtime went backwards from 8023812124181248 usec to 979712 usec 
for pid 13 (geom)

So, disabling Turbo-Boost doesn't resolve the problem.

-Kurt