Metrics operations

libuv provides a metrics API to track the amount of time the event loop has spent idle in the kernel’s event provider.

API

uint64_t uv_metrics_idle_time(uv_loop_t* loop)

Retrieve the amount of time the event loop has been idle in the kernel’s event provider (e.g. epoll_wait). The call is thread safe.

The return value is the accumulated time spent idle in the kernel’s event provider starting from when the uv_loop_t was configured to collect the idle time.

Note

The event loop will not begin accumulating the event provider’s idle time until calling uv_loop_configure with UV_METRICS_IDLE_TIME.

New in version 1.39.0.