[data from a 300MHz Mobile Pentium II]

PERFCTR INIT: vendor 0, family 6, model 5
PERFCTR INIT: NITER == 64
PERFCTR INIT: rdpmc ticks == 2035
PERFCTR INIT: rdmsr (counter) ticks == 5290
PERFCTR INIT: rdmsr (evntsel) ticks == 4547
PERFCTR INIT: wrmsr (counter) ticks == 5972
PERFCTR INIT: wrmsr (evntsel) ticks == 5384
PERFCTR INIT: read %cr4 ticks == 213
PERFCTR INIT: write %cr4 ticks == 2763
PERFCTR INIT: loop overhead ticks == 89