Re: Dual core Athlons and unsynced TSCs

Lee Revell
2006-01-15T16:33:42Z

On Sun, 2006-01-15 at 08:25 -0800, thockin@hockin.org wrote:
> On Sun, Jan 15, 2006 at 01:52:44AM -0700, Zan Lynx wrote:
> > A laptop user could also bind a process to a single CPU, and use the
> > scaling min/max values to lock CPU speed to a single value. The TSC may
> > still stop during HLT, but software must be handling that already.
> >
> > Wouldn't that provide an accurate TSC?
>
> monotonic but not linear. Also remember that the OS will use rdtsc here
> and there, and you can't affine the OS :)
>

So the options are either to fix the TSC handling on these systems (by
resyncing the TSCs when exiting from HLT), or eliminate the use of rdtsc
by the OS?

Lee