APIC_TICKS_TO_NSECS
curr_timeval = APIC_TICKS_TO_NSECS(elapsed_ticks);
apic_nsec_max = APIC_TICKS_TO_NSECS(APIC_MAXVAL);
ret = (int)APIC_TICKS_TO_NSECS(1);
ns_val = APIC_TICKS_TO_NSECS(count_val);