[data from a 300 MHz PowerPC 750]

PERFCTR INIT: PVR 0x00080202, CPU clock 300753 kHz, TB clock 16708 kHz
PERFCTR INIT: NITER == 256
PERFCTR INIT: loop overhead is 40 cycles
PERFCTR INIT: mftbl cost is 1.9 cycles (541 total)
PERFCTR INIT: mfspr (pmc1) cost is 1.8 cycles (519 total)
PERFCTR INIT: mfspr (pmc2) cost is 1.8 cycles (516 total)
PERFCTR INIT: mfspr (pmc3) cost is 1.8 cycles (520 total)
PERFCTR INIT: mfspr (pmc4) cost is 1.8 cycles (516 total)
PERFCTR INIT: mfspr (mmcr0) cost is 1.8 cycles (523 total)
PERFCTR INIT: mfspr (mmcr1) cost is 1.8 cycles (516 total)
PERFCTR INIT: mtspr (pmc2) cost is 1.8 cycles (525 total)
PERFCTR INIT: mtspr (pmc3) cost is 1.8 cycles (516 total)
PERFCTR INIT: mtspr (pmc4) cost is 1.8 cycles (519 total)
PERFCTR INIT: mtspr (mmcr1) cost is 1.9 cycles (545 total)
PERFCTR INIT: mtspr (mmcr0) cost is 2.0 cycles (559 total)
PERFCTR INIT: check_fcece(0): MMCR0[FC] is 0, PMC1 is 0x80000076
PERFCTR INIT: check_fcece(1): MMCR0[FC] is 0, PMC1 is 0x80000040
PERFCTR INIT: check_trigger(0): MMCR0[TRIGGER] is 1, PMC1 is 0x80000076, PMC2 is 0x78
PERFCTR INIT: check_trigger(1): MMCR0[TRIGGER] is 1, PMC1 is 0x80000041, PMC2 is 0x41
perfctr: driver 2.6.4, cpu type PowerPC 60x/7xx/74xx at 300753 kHz