tor

@dir /lib/metrics @brief lib/metrics: Metrics collection API

This module is used for adding "metrics" support to Tor.

Metrics are a collection of counters that are defined per-subsystem and accessed through the MetricsPort. Each subsystem is responsible for populating metrics store(s) and providing access to them through the .get_metrics() call located in the subsys_fns_t object.

These metrics are meant to be extremely lightweight and thus can be accessed without too much CPU cost.