[data from a 500MHz Athlon]

PERFCTR INIT: vendor 2, family 6, model 1
PERFCTR INIT: NITER == 64
PERFCTR INIT: rdpmc ticks == 930
PERFCTR INIT: rdmsr (counter) ticks == 3401
PERFCTR INIT: rdmsr (evntsel) ticks == 3454
PERFCTR INIT: wrmsr (counter) ticks == 5197
PERFCTR INIT: wrmsr (evntsel) ticks == 14915
PERFCTR INIT: loop overhead ticks == 98
PERFCTR INIT: Athlon test0 == 0 (ok)
PERFCTR INIT: Athlon test1 == 43 (ok)
PERFCTR INIT: Athlon test2 == 43 (EvntSel0 does not override)
PERFCTR INIT: Athlon test3 == 0 (ok)