hardware performance monitoring counters

[Russell L. Carter]

Greetings,
I'd like to use the PMC capabilities, but I seem to have
a misconfiguration:

root at bruno> pmccontrol -l
pmccontrol: Initialization of the pmc(3) library failed: No such file or 
directory

In my kernel conf directory:

root at bruno> grep -i pmc *
[...]
RLCBASE:options         HWPMC_HOOKS             # Necessary kernel hooks 
for hwpmc(4)
[...]

Both amd and intel systems have the same error on fresh 11/stable
amd64 systems.  Mr. google turns up people having the same
problem, but no solutions.

Does anyone know how I might fix this?

Thanks,
Russell