[data from a 266MHz Pentium II]

PERFCTR INIT: vendor 0, family 6, model 5
PERFCTR INIT: NITER == 64
PERFCTR INIT: rdpmc ticks == 2045
PERFCTR INIT: rdmsr (counter) ticks == 5302
PERFCTR INIT: rdmsr (evntsel) ticks == 4533
PERFCTR INIT: wrmsr (counter) ticks == 6322
PERFCTR INIT: wrmsr (evntsel) ticks == 5713
PERFCTR INIT: loop overhead ticks == 90
