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[altq 577] Re: Running ALTQ
Andriy Korud wrote:
> And few more questions:
> 1. What does ALTQ_NOPCC option mean? Will disabling it (using
> processor counters) improve limit resolution?
It requires only one machine cycle to read a processor cycle couner
(timestamp counter for pentium), which is much cheaper than using
microtime(). However, it doesn't affect the kernel timer resolution.
> 2. When CDRN or HFSC are typically used? I saw something about that
> CDRN can limit incoming traffic, is it true? Maybe some references in
CDNR (traffic conditioners) is a set of mechanisms to meter, mark, or
drop incoming traffic. A good starting point would be RFC2475 (An
Architecture for Differentiated Services).
HFSC (hierachical fair service curve) is a queueing discipline from