svn commit: r184102 - in head/sys: amd64/amd64 amd64/include contrib/altq/altq i386/i386 i386/include i386/isa

[Jung-uk Kim]

On Monday 20 October 2008 08:38 pm, Jung-uk Kim wrote:
> Author: jkim
> Date: Tue Oct 21 00:38:00 2008
> New Revision: 184102
> URL: http://svn.freebsd.org/changeset/base/184102
>
> Log:
>   Turn off CPU frequency change notifiers when the TSC is P-state
> invariant or it is forced by setting
> 'kern.timecounter.invariant_tsc' tunable to non-zero.

I believe recent Intel CPUs also have P-state invariant TSCs and I saw 
some people reported issues with them as well.
In fact, I bought a new AMD CPU and it has P-state invariant TSC.  But 
the CPU ID wasn't set.  I heard BIOS wouldn't set it if all cores are 
not synchronized.  So, I had to force it with the tunable. :-(

Jung-uk Kim