Performance Tools in FreeBSD

[Joseph Koshy]

>      However, PMC seems not to be supported in AMD Opteron CPU because i
> get a "invalid arguments" error when
>
>      i use the command pmcstat -S instructions -O <outputfile>. However,
> "instructions, cycles,..." are documented in
>
>     pmc manual. By the way, I enable the options in configuration file
> options HWPMC_HOOKS and device hwpmc.

What kind of CPU do you have?  Are there any messages from hwpmc(4)
when it initializes?

Koshy