Module perf_event::events

Events we can monitor or count.

There are three general categories of event:

• Hardware events are counted by the processor itself. This includes things like clock cycles, instructions retired, and cache and branch prediction statistics.

• Software events are counted by the kernel. This includes things like context switches, page faults, and so on.

• Cache events offer a more detailed view of the processor's cache counters. You can select which level of the cache hierarchy to observe, discriminate between data and instruction caches, and so on.

The Event type is just an enum with a variant for each of the above types, which all implement Into<Event>.

Linux supports many more kinds of events than this module covers, including events specific to particular make and model of processor, and events that are dynamically registered by drivers and kernel modules. If something you want is missing, think about the best API to expose it, and submit a pull request!

Structs

Cache

A cache event.

Enums

CacheOp	What sort of cache operation we would like to observe.
CacheResult	What sort of cache result we're interested in observing.
Event	Any sort of event. This is a sum of the Hardware, Software, and Cache types, which all implement Into<Event>.
Hardware	Hardware counters.
Software	Software counters, implemented by the kernel.
WhichCache	A cache whose events we would like to count.