SWI-Prolog -- thread

Documentation
- Reference manual
  - Multithreaded applications
    - Monitoring threads
- Packages

Availability:built-in

thread_statistics(+Id, +Key, -Value)

Obtains statistical information on thread Id as statistics/2 does in single-threaded applications. This call supports all keys of statistics/2, although only stack sizes, cputime, inferences, epoch, errors and warnings yield different values for each thread. For errors and warnings statistics/2 gives the global process count and this predicate gives the counts for the calling thread.^{200There is no
portable interface to obtain thread-specific CPU time and some operating
systems provide no access to this information at all. On such systems
the total process CPU is returned. Thread CPU time is supported on
MS-Windows, Linux and MacOSX.}