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Date:      Tue, 29 Jul 2008 18:34:21 +0300
From:      "Dimitar Vasilev" <dimitar.vassilev@gmail.com>
To:        "Kris Kennaway" <kris@freebsd.org>
Cc:        nightrecon@verizon.net, freebsd-questions@freebsd.org
Subject:   Re: calcru went backwards on 7 stable
Message-ID:  <59adc1a0807290834o22bc072ao95698f888d29488d@mail.gmail.com>
In-Reply-To: <59adc1a0807240802l7061ff26r3dbfe8048d3a62ce@mail.gmail.com>
References:  <59adc1a0807240122q7253bbeasff1f3a7b6c216561@mail.gmail.com> <g69iub$tp$1@ger.gmane.org> <488853C5.9000500@FreeBSD.org> <59adc1a0807240604m51c75a89n4ab7c426db1455fb@mail.gmail.com> <488886D8.4030400@FreeBSD.org> <59adc1a0807240802l7061ff26r3dbfe8048d3a62ce@mail.gmail.com>

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Thanks in

2008/7/24 Dimitar Vasilev <dimitar.vassilev@gmail.com>

>
>
> 2008/7/24 Kris Kennaway <kris@freebsd.org>:
>
> Dimitar Vasilev wrote:
>>
>>> The "calcru went backwards" message can have two causes:
>>>>
>>>> 1) Your time counter really went backwards and is too broken to use.
>>>>
>>>> 2) Something caused clock interrupts to be delayed for extremely long
>>>> periods of time.  This happens if you break to DDB for example.  It can
>>>> also
>>>> happen if there are kernel bugs, maybe in a driver etc.  Try to enable
>>>> additional debugging (WITNESS, INVARIANTS, etc; see the developers
>>>> handbook)
>>>> and see where it gets you.
>>>>
>>>> Kris
>>>>
>>>> _______________________________________________
>>>> freebsd-questions@freebsd.org mailing list
>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
>>>> To unsubscribe, send any mail to "
>>>> freebsd-questions-unsubscribe@freebsd.org"
>>>>
>>>>  Thanks Kris,
>>>
>>> Last time I tried to set the date there was a problem with the year  - I
>>> could not set the date beyond 2007
>>>
>>
>> That doesn't sound like a FreeBSD bug.
>>
> Hello,
I did kgdb print_cpu ticks today.
It says
(kgdb) print cpu_ticks
$1 = (cpu_tick_f *) 0xffffffff8077d340 <rdtsc>
This means that kernel is using tsc discipline actually imho.
Could someone confirm this?



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