Clock skew on FC13

Tom Horsley horsley1953 at gmail.com
Tue Dec 7 23:56:30 UTC 2010


On Wed, 08 Dec 2010 09:59:26 +1030
Tim wrote:

> I don't think the original poster said which clock was skewing.

There are indeed a gazillion or so clock options you can
specify on the kernel command line. Perhaps making it
use a different clock source would work better. (The kernel
may believe it knows something about the clock it picked
which isn't actually true on the motherboard in question).

From the kernel-parameters.txt file in the kernel-doc
rpm:

	clock=		[BUGS=X86-32, HW] gettimeofday clocksource override.
			[Deprecated]
			Forces specified clocksource (if available) to be used
			when calculating gettimeofday(). If specified
			clocksource is not available, it defaults to PIT.
			Format: { pit | tsc | cyclone | pmtmr }

	clocksource=	[GENERIC_TIME] Override the default clocksource
			Format: <string>
			Override the default clocksource and use the clocksource
			with the name specified.
			Some clocksource names to choose from, depending on
			the platform:
			[all] jiffies (this is the base, fallback clocksource)
			[ACPI] acpi_pm
			[ARM] imx_timer1,OSTS,netx_timer,mpu_timer2,
				pxa_timer,timer3,32k_counter,timer0_1
			[AVR32] avr32
			[X86-32] pit,hpet,tsc,vmi-timer;
				scx200_hrt on Geode; cyclone on IBM x440
			[MIPS] MIPS
			[PARISC] cr16
			[S390] tod
			[SH] SuperH
			[SPARC64] tick
			[X86-64] hpet,tsc


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