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The free threading build uses QSBR to delay the freeing of dictionary
keys and list arrays when the objects are accessed by multiple threads
in order to allow concurrent reads to proceed with holding the object
lock. The requests are processed in batches to reduce execution
overhead, but for large memory blocks this can lead to excess memory
usage.
Take into account the size of the memory block when deciding when to
process QSBR requests.
Also track the amount of memory being held by QSBR for mimalloc pages.
Advance the write sequence if this memory exceeds a limit. Advancing
the sequence will allow it to be freed more quickly.
Process the held QSBR items from the "eval breaker", rather than from
`_PyMem_FreeDelayed()`. This gives a higher chance that the global read
sequence has advanced enough so that items can be freed.
(cherry picked from commit
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| .. | ||
| cpython | ||
| internal | ||
| abstract.h | ||
| bltinmodule.h | ||
| boolobject.h | ||
| bytearrayobject.h | ||
| bytesobject.h | ||
| ceval.h | ||
| codecs.h | ||
| compile.h | ||
| complexobject.h | ||
| critical_section.h | ||
| datetime.h | ||
| descrobject.h | ||
| dictobject.h | ||
| dynamic_annotations.h | ||
| enumobject.h | ||
| errcode.h | ||
| exports.h | ||
| fileobject.h | ||
| fileutils.h | ||
| floatobject.h | ||
| frameobject.h | ||
| genericaliasobject.h | ||
| import.h | ||
| intrcheck.h | ||
| iterobject.h | ||
| listobject.h | ||
| lock.h | ||
| longobject.h | ||
| marshal.h | ||
| memoryobject.h | ||
| methodobject.h | ||
| modsupport.h | ||
| moduleobject.h | ||
| monitoring.h | ||
| object.h | ||
| objimpl.h | ||
| opcode.h | ||
| opcode_ids.h | ||
| osdefs.h | ||
| osmodule.h | ||
| patchlevel.h | ||
| py_curses.h | ||
| pyatomic.h | ||
| pybuffer.h | ||
| pycapsule.h | ||
| pydtrace.d | ||
| pydtrace.h | ||
| pyerrors.h | ||
| pyexpat.h | ||
| pyframe.h | ||
| pyhash.h | ||
| pylifecycle.h | ||
| pymacconfig.h | ||
| pymacro.h | ||
| pymath.h | ||
| pymem.h | ||
| pyport.h | ||
| pystate.h | ||
| pystats.h | ||
| pystrcmp.h | ||
| pystrtod.h | ||
| Python.h | ||
| pythonrun.h | ||
| pythread.h | ||
| pytypedefs.h | ||
| rangeobject.h | ||
| README.rst | ||
| setobject.h | ||
| sliceobject.h | ||
| structmember.h | ||
| structseq.h | ||
| sysmodule.h | ||
| traceback.h | ||
| tupleobject.h | ||
| typeslots.h | ||
| unicodeobject.h | ||
| warnings.h | ||
| weakrefobject.h | ||
The Python C API ================ The C API is divided into these sections: 1. ``Include/``: Limited API 2. ``Include/cpython/``: CPython implementation details 3. ``Include/cpython/``, names with the ``PyUnstable_`` prefix: API that can change between minor releases 4. ``Include/internal/``, and any name with ``_`` prefix: The internal API Information on changing the C API is available `in the developer guide`_ .. _in the developer guide: https://devguide.python.org/c-api/