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7 Commits

Author SHA1 Message Date
Mark Shannon f55273b3b7
GH-116968: Remove branch from advance_backoff_counter (GH-124469) 2024-10-07 11:46:33 +01:00
Brandt Bucher 26a74203f0
GH-118093: Fix off-by-one errors in tier-up thresholds (GH-124447) 2024-09-27 09:38:04 -07:00
Brandt Bucher 33903c53db
GH-116017: Get rid of _COLD_EXITs (GH-120960) 2024-07-01 13:17:40 -07:00
Victor Stinner 9e4a81f00f
gh-120642: Move private PyCode APIs to the internal C API (#120643) 
* Move _Py_CODEUNIT and related functions to pycore_code.h.
* Move _Py_BackoffCounter to pycore_backoff.h.
* Move Include/cpython/optimizer.h content to pycore_optimizer.h.
* Remove Include/cpython/optimizer.h.
* Remove PyUnstable_Replace_Executor().

Rename functions:

* PyUnstable_GetExecutor() => _Py_GetExecutor()
* PyUnstable_GetOptimizer() => _Py_GetOptimizer()
* PyUnstable_SetOptimizer() => _Py_SetTier2Optimizer()
* PyUnstable_Optimizer_NewCounter() => _PyOptimizer_NewCounter()
* PyUnstable_Optimizer_NewUOpOptimizer() => _PyOptimizer_NewUOpOptimizer()
 2024-06-26 13:54:03 +02:00
Guido van Rossum 40cc809902
gh-117549: Don't use designated initializers in headers (#118580) 
The designated initializer syntax in static inline functions in pycore_backoff.h
causes problems for C++ or MSVC users who aren't yet using C++20.
While internal, pycore_backoff.h is included (indirectly, via pycore_code.h)
by some key 3rd party software that does so for speed.
 2024-05-05 19:28:55 +00:00
Michael Droettboom b5e60918af
gh-117549: Match declaration order for _Py_BackoffCounter initializer (#117551) 
Otherwise it might not compile with C++ (or certain C compilers/flags?).
 2024-04-04 14:14:35 -07:00
Guido van Rossum 060a96f1a9
gh-116968: Reimplement Tier 2 counters (#117144) 
Introduce a unified 16-bit backoff counter type (``_Py_BackoffCounter``),
shared between the Tier 1 adaptive specializer and the Tier 2 optimizer. The
API used for adaptive specialization counters is changed but the behavior is
(supposed to be) identical.

The behavior of the Tier 2 counters is changed:
- There are no longer dynamic thresholds (we never varied these).
- All counters now use the same exponential backoff.
- The counter for ``JUMP_BACKWARD`` starts counting down from 16.
- The ``temperature`` in side exits starts counting down from 64.
 2024-04-04 15:03:27 +00:00