Kernel Statistics Structure Members

The members of a kstat structure are:

ks_class[KSTAT_STRLEN]

Categorizes the kstat type as bus, controller, device_error, disk, hat, kmem_cache, kstat, misc, net, nfs, pages, partition, rps, ufs, vm, or vmem.

ks_crtime

Time at which the kstat was created. ks_crtime is commonly used in calculating rates of various counters.

ks_data

Points to the data section for the kstat.

ks_data_size

Total size of the data section in bytes.

ks_instance

The instance of the kernel module that created this kstat. ks_instance is combined with ks_module and ks_name to give the kstat a unique, meaningful name.

ks_kid

Unique ID for the kstat.

ks_module[KSTAT_STRLEN]

Identifies the kernel module that created this kstat. ks_module is combined with ks_instance and ks_name to give the kstat a unique, meaningful name. KSTAT_STRLEN sets the maximum length of ks_module.

ks_name[KSTAT_STRLEN]

A name assigned to the kstat in combination with ks_module and ks_instance. KSTAT_STRLEN sets the maximum length of ks_module.

ks_ndata

Indicates the number of data records for those kstat types that support multiple records: KSTAT_TYPE_RAW, KSTAT_TYPE_NAMED, and KSTAT_TYPE_TIMER

ks_next

Points to next kstat in the chain.

ks_resv

A reserved field.

ks_snaptime

The timestamp for the last data snapshot, useful in calculating rates.

ks_type

The data type, which can be KSTAT_TYPE_RAW for binary data, KSTAT_TYPE_NAMED for name/value pairs, KSTAT_TYPE_INTR for interrupt statistics, KSTAT_TYPE_IO for I/O statistics, and KSTAT_TYPE_TIMER for event timers.