PF/ALTQ - Stable TSC?

APseudoUtopia apseudoutopia at
Thu Dec 15 17:39:47 UTC 2011

I'm setting up pf with altq support in my kernel on freebsd 9.0-Stable
(soon to switch to the -RELEASE once it's available).
The system is a quad-core Xeon E31220, running amd64.
I've done a bit of googling and found various results. I know the
freebsd handbook says ALTQ_NOPCC is required on SMP systems. My
kern.timecounter.smp_tsc=1, which says the TSC is safe to use in SMP
mode. Is it still required to use ALTQ_NOPCC on _ALL_ smp systems?
Basically I'm just seeing very different answers with my own research,
which is why I'm posting to this list.

Thank you!

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