RE: Dual core Athlons and unsynced TSCs

[Roger Heflin]

> -----Original Message-----
> From: linux-kernel-owner@xxxxxxxxxxxxxxx 
> [mailto:linux-kernel-owner@xxxxxxxxxxxxxxx] On Behalf Of Lee Revell
> Sent: Thursday, January 12, 2006 4:18 PM
> To: linux-kernel
> Subject: Dual core Athlons and unsynced TSCs
> 
> It's been known for quite some time that the TSCs are not 
> synced between cores on Athlon X2 machines and this screws up 
> the kernel's timekeeping, as it still uses the TSC as the 
> default time source on these machines.
> 
> This problem still seems to be present in the latest kernels. 
>  What is the plan to fix it?  Is the fix simply to make the 
> kernel use the ACPI PM timer by default on Athlon X2?


Do we know if this also affects dual-core opterons?

The symptoms are that the clocks run at 2x the speed, correct?

                               Roger

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/