HPX offers several ways by which you may provide your own data as a performance counter. This has the benefit of exposing additional, possibly application specific information using the existing Performance Counter framework, unifying the process of gathering data about your application.

An application that wants to provide counter data can implement a Performance Counter to provide the data. When a consumer queries performance data, the HPX runtime system calls the provider to collect the data. The runtime system uses an internal registry to determine which provider to call.

Generally, there two ways of exposing yur own Performance Counter data: a simple, function based way and a more complex, but more powerful way of implementing a full Performance Counter. Both alternatives are described in the following sections.