[data from a 1.0 GHz Athlon]

PERFCTR INIT: vendor 2, family 6, model 4

PERFCTR INIT: NITER == 64

PERFCTR INIT: rdpmc ticks == 1679

PERFCTR INIT: rdmsr (counter) ticks == 3399

PERFCTR INIT: rdmsr (evntsel) ticks == 3453

PERFCTR INIT: wrmsr (counter) ticks == 5893

PERFCTR INIT: wrmsr (evntsel) ticks == 14955

PERFCTR INIT: read %cr4 ticks == 219

PERFCTR INIT: write %cr4 ticks == 4129

PERFCTR INIT: loop overhead ticks == 83

PERFCTR INIT: Athlon test0 == 0 (ok)

PERFCTR INIT: Athlon test1 == 35 (ok)

PERFCTR INIT: Athlon test2 == 35 (EvntSel0 does not override)

PERFCTR INIT: Athlon test3 == 0 (ok)