Re: [Xen-devel] [PATCH v2 2/5] x86/time: Always count s_time from Xen boot

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 28/02/14 18:57, Andrew Cooper wrote:
> From: Tim Deegan <tim@xxxxxxx>
> 
> In the early-boot clock, before the calibration routines kick in,
> count time from Xen boot rather than from when the BSP's TSC was 0.
> 
> Signed-off-by: Tim Deegan <tim@xxxxxxx>
> 
> Stash the timestamp in head.S as a good approximation of when we actually
> started, rather than measuing "time since we ran early_time_init()"

Is this difference/accuracy interesting?  It seems more obvious to me to
just read the TSC in early_time_init().

David

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