SV = PVGV(0x816c6e8) at 0x814f6d8    # Reference (at 0x814f6d8) to typeglob (at 0x816c6e8)?
  GP = 0x816c720                     # Address of typeglob? Has AV, HV, CV.
    CV = 0x814f714                   # Address of CV of f()

SV = PVGV(0x816f938) at 0x814f810    # Akin to above
  GP = 0x81709f8                     # ""
    CV = 0x0                         # Child::f()'s pointer to CV, equiv place to Base::f()
    CVGEN = 0x0                      # "generated CV"? do you mean "this CVGEN 'slot' is used for nothing else than method dispatch"?