KERN_CCPU
mib[1] = KERN_CCPU;
mib[0] == CTL_KERN && mib[1] == KERN_CCPU)
{KERN_CCPU, &ccpu, SYSCTL_INT_READONLY},
case KERN_CCPU:
static int ccpu_mib[] = { CTL_KERN, KERN_CCPU };