Useful kernel variables
The following table lists a few examples of useful kernel variables that can be accessed from within a Vue script. Be careful when using them in a Vue script because although not likely, the names of these variables or their meanings can change across different releases of AIX. All these kernel variables are pinned in memory and exported from the kernel.
| Kernel variable | Description | Associated header files |
|---|---|---|
| struct system_configuration _system_configuration | System configuration structure. | sys/systemcfg.h |
| struct var v | Base kernel tunable (and other) parameters. | sys/var.h |
| struct timestruc_t tod | Memory-mapped time of day clock. Seconds and nanoseconds since Epoch. | sys/time.h |
| cpu_t high_cpuid | Highest logical CPU ID ever online. | sys/encap.h |
| struct vminfo vmminfo | Data structure that contains the information shown by the vmstat command. | sys/vminfo.h |
| time_t lbolt | Number of ticks since last boot. | sys/time.h |
| char spurr_version | Identifies if current system supports the SPURR register 0=No SPURR, 1=CPUs have SPURR. | sys/sysinfo.h |
| struct utsname utsname | System name structure that includes the operating system name, node name, release level, and so on. | sys/utsname.h |