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Date: Fri, 18 Apr 2008 16:51:50 +0300
From: Pertti Kosunen <pertti.kosunen@pp.nic.fi>
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Subject: Re: calcru: time went backwards
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Larry Rosenman wrote:
> On Tue, 15 Apr 2008, Jeremy Chadwick wrote:
>> And what the FAQ doesn't cover is here:
>>
>> http://wiki.freebsd.org/JeremyChadwick/Commonly_reported_issues
>>
>> * EIST (Intel SpeedStep) incompatibilities with Supermicro PDSMI+ 
>> motherboards (and possibly others)
>>    * Symptom: kernel outputs messages like kernel: calcru: negative 
>> runtime of -XXXXX usec for pid XX
>>    * Workaround: Disable the EIST feature in the BIOS. You can still 
>> achieve ACPI-based processor
>>      frequency throttling by using powerd(8).
>>    * Reference: 
>> http://lists.freebsd.org/pipermail/freebsd-questions/2006-October/133253.html 
>>
> What I find interesting is I hadn't seen these until this kernel update :(

Same problem here with Tyan Toledo i3000R (S5191) motherboard if cpufreq 
module is loaded.

7.0-RELEASE (AMD64) didn't have this problem.