[data from a 233MHz Pentium MMX]

PERFCTR INIT: vendor 0, family 5, model 4
PERFCTR INIT: NITER == 64
PERFCTR INIT: rdpmc ticks == 961
PERFCTR INIT: rdmsr (counter) ticks == 1858
PERFCTR INIT: rdmsr (evntsel) ticks == 1583
PERFCTR INIT: wrmsr (counter) ticks == 2396
PERFCTR INIT: wrmsr (evntsel) ticks == 2407
PERFCTR INIT: loop overhead ticks == 55
