[data from a 733 MHz Pentium III (Coppermine) (perhaps a Celeron)]

PERFCTR INIT: vendor 0, family 6, model 8, stepping 3, clock 731473 kHz
PERFCTR INIT: NITER == 64
PERFCTR INIT: loop overhead is 199 cycles
PERFCTR INIT: rdtsc cost is 39.0 cycles (2695 total)
PERFCTR INIT: rdpmc cost is 35.3 cycles (2464 total)
PERFCTR INIT: rdmsr (counter) cost is 91.4 cycles (6052 total)
PERFCTR INIT: rdmsr (evntsel) cost is 72.9 cycles (4866 total)
PERFCTR INIT: wrmsr (counter) cost is 80.7 cycles (5367 total)
PERFCTR INIT: wrmsr (evntsel) cost is 76.1 cycles (5072 total)
PERFCTR INIT: read cr4 cost is 1.9 cycles (323 total)
PERFCTR INIT: write cr4 cost is 42.2 cycles (2903 total)
PERFCTR INIT: sync_core cost is 110.3 cycles (7264 total)
perfctr: driver 2.7.6, cpu type Intel P6 at 731473 kHz