[RFC] Enabling invariant TSC timecounter on SMP

[Andriy Gapon]

on 24/05/2011 20:56 Jung-uk Kim said the following:
> I think it's about time to enable invariant TSC timecounter on SMP by 
> default.  Please see the attached patch.  It is also available from 
> here:
> 
> http://people.freebsd.org/~jkim/tsc_smp_test4.diff
> 
> avg convinced me enough that it should be an opt-out feature going 
> forward. :-)

Not sure if I really did that.
My position is this:
- if we think that TSC is SMP-safe then it should have the best priority
- we should do our best to auto-guess if TSC is SMP-safe unless a user explicitly
overrides that property (either via explicit testing or by making guesses based on
CPU model or etc)

> Comments?

Perhaps I missed it, but I don't remember the "lowres" part of the patch being
discussed.

-- 
Andriy Gapon