cpython/Include/pystats.h
Victor Stinner a0773b89df
gh-108753: Enhance pystats (#108754)
Statistics gathering is now off by default. Use the "-X pystats"
command line option or set the new PYTHONSTATS environment variable
to 1 to turn statistics gathering on at Python startup.

Statistics are no longer dumped at exit if statistics gathering was
off or statistics have been cleared.

Changes:

* Add PYTHONSTATS environment variable.
* sys._stats_dump() now returns False if statistics are not dumped
  because they are all equal to zero.
* Add PyConfig._pystats member.
* Add tests on sys functions and on setting PyConfig._pystats to 1.
* Add Include/cpython/pystats.h and Include/internal/pycore_pystats.h
  header files.
* Rename '_py_stats' variable to '_Py_stats'.
* Exclude Include/cpython/pystats.h from the Py_LIMITED_API.
* Move pystats.h include from object.h to Python.h.
* Add _Py_StatsOn() and _Py_StatsOff() functions. Remove
  '_py_stats_struct' variable from the API: make it static in
  specialize.c.
* Document API in Include/pystats.h and Include/cpython/pystats.h.
* Complete pystats documentation in Doc/using/configure.rst.
* Don't write "all zeros" stats: if _stats_off() and _stats_clear()
  or _stats_dump() were called.
* _PyEval_Fini() now always call _Py_PrintSpecializationStats() which
  does nothing if stats are all zeros.

Co-authored-by: Michael Droettboom <mdboom@gmail.com>
2023-09-06 15:54:59 +00:00

27 lines
596 B
C

// Statistics on Python performance (public API).
//
// Define _Py_INCREF_STAT_INC() and _Py_DECREF_STAT_INC() used by Py_INCREF()
// and Py_DECREF().
//
// See Include/cpython/pystats.h for the full API.
#ifndef Py_PYSTATS_H
#define Py_PYSTATS_H
#ifdef __cplusplus
extern "C" {
#endif
#if defined(Py_STATS) && !defined(Py_LIMITED_API)
# define Py_CPYTHON_PYSTATS_H
# include "cpython/pystats.h"
# undef Py_CPYTHON_PYSTATS_H
#else
# define _Py_INCREF_STAT_INC() ((void)0)
# define _Py_DECREF_STAT_INC() ((void)0)
#endif // !Py_STATS
#ifdef __cplusplus
}
#endif
#endif // !Py_PYSTATS_H