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Date:      Thu, 23 Mar 2006 12:31:18 -0800
From:      Maxim Sobolev <sobomax@FreeBSD.org>
To:        Poul-Henning Kamp <phk@phk.freebsd.dk>
Cc:        "current@freebsd.org" <current@FreeBSD.org>
Subject:   Re: timecounting with TSC doesn't work properly on my notebook
Message-ID:  <44230596.20100@FreeBSD.org>
In-Reply-To: <13727.1143094901@critter.freebsd.dk>
References:  <13727.1143094901@critter.freebsd.dk>

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Poul-Henning Kamp wrote:
> In message <4421D322.3010901@digifonica.com>, Maksym Sobolyev writes:
>> Hi,
>>
>> After updating to the recent current (previous one was circa end-2005) I 
>> have found that time on machine goes by 3-4 times faster than wallclock 
>>  with TSC timecounter. Selecting ACPI-safe instead helps.
> 
> It should not default to TSC if it has ACPI-safe.
> 
> The TSC varies with power-save featurs on most laptops.

OK, don't know why but I am having lot of "runtime went backwards" with 
ACPI-safe.

-Maxim



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