Current-Users archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

Re: Using the evcnt infrastructure in NetBSD, any experience?

On Thu, Sep 24, 2009 at 16:07:13 -0700, Brian Buhrow wrote:

>       So, my question is, has anyone turned on those extra event counting
> options in any of the network drivers, and, if so, did you find that things
> were just as stable as they were without those options enabled?  I can turn
> them on, but I'd like to know if someone has gone before me.

evcnt instrumentation basically means adding 64-bit additions here and
there to increment your counters, so it cannot cause any stability
issues.  (FWIW, I used them during development in fast TLB miss
handlers that are about as stablity critical as it can get)


Home | Main Index | Thread Index | Old Index