[data from a 450MHz Pentium III]

PERFCTR INIT: vendor 0, family 6, model 7
PERFCTR INIT: NITER == 64
PERFCTR INIT: rdpmc ticks == 2399
PERFCTR INIT: rdmsr (counter) ticks == 5237
PERFCTR INIT: rdmsr (evntsel) ticks == 4490
PERFCTR INIT: wrmsr (counter) ticks == 7432
PERFCTR INIT: wrmsr (evntsel) ticks == 6808
PERFCTR INIT: loop overhead ticks == 89
