kstat
kstat is a kernel statistics facility used by Solaris and related systems to expose runtime kernel metrics to user-space programs. It provides a unified, stable interface for monitoring resources, performance counters, and internal state across various subsystems such as CPU activity, memory, I/O, networking, and device drivers.
In the kernel, statistics are organized as a chain of kstat objects. Each object is identified by
The data model supports both simple named statistics and more complex structures. Named statistics are represented
kstat serves as a core mechanism for system monitoring, diagnostics, and performance tuning. It remains a foundational