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Miss Islington (bot) 6a2a2906f8
[3.14] GH-133136: Revise QSBR to reduce excess memory held (gh-135473) (#135912) 
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 113de8545f)

Co-authored-by: Neil Schemenauer <nas-github@arctrix.com>
Co-authored-by: Sam Gross <colesbury@gmail.com>
2025-07-08 10:58:01 -07:00
..
mimalloc [3.14] Doc: fix duplicated words (GH-136086) (#136108) 2025-06-29 18:45:26 -04:00
pycore_abstract.h gh-106320: Remove private AC converter functions (#108505) 2023-08-26 04:05:17 +02:00
pycore_asdl.h gh-87347: Add parenthesis around macro arguments (#93915) 2022-06-20 16:04:52 +02:00
pycore_ast.h gh-132661: Implement PEP 750 (#132662) 2025-04-30 11:46:41 +02:00
pycore_ast_state.h gh-132661: Implement PEP 750 (#132662) 2025-04-30 11:46:41 +02:00
pycore_atexit.h gh-131238: Remove pycore_lock.h includes (#131483) 2025-03-19 23:46:25 +00:00
pycore_audit.h gh-125604: Move _Py_AuditHookEntry, etc. Out of pycore_runtime.h (gh-125605) 2024-10-18 09:26:08 -06:00
pycore_backoff.h gh-131238: Move pycore_obmalloc.h include to pycore_runtime_structs.h (#131482) 2025-03-19 23:32:30 +00:00
pycore_bitutils.h gh-108216: Cleanup #include in internal header files (#108228) 2023-08-21 18:05:59 +00:00
pycore_blocks_output_buffer.h gh-108220: Internal header files require Py_BUILD_CORE to be defined (#108221) 2023-08-21 19:15:52 +02:00
pycore_brc.h gh-131238: Remove pycore_lock.h includes (#131483) 2025-03-19 23:46:25 +00:00
pycore_bytes_methods.h gh-117431: Adapt bytes and bytearray .find() and friends to Argument Clinic (#117502) 2024-04-12 07:40:55 +00:00
pycore_bytesobject.h [3.14] gh-133767: Fix use-after-free in the unicode-escape decoder with an error handler (GH-129648) (GH-133942) 2025-05-13 16:25:08 +03:00
pycore_c_array.h gh-130080: move _Py_EnsureArrayLargeEnough to a separate header so it can be used outside of the compiler (#130930) 2025-03-13 16:02:58 +00:00
pycore_call.h gh-131238: Remove pycore_runtime.h from pycore_pystate.h (#131356) 2025-03-19 17:33:24 +01:00
pycore_capsule.h gh-108240: Add pycore_capsule.h internal header file (#108596) 2023-08-29 01:20:02 +00:00
pycore_cell.h gh-123358: Use _PyStackRef in LOAD_DEREF (gh-130064) 2025-03-26 12:08:20 -04:00
pycore_ceval.h [3.14] gh-135755: Move SPECIAL_ constants to a private header (GH-135922) (GH-135926) 2025-06-25 13:36:46 +02:00
pycore_ceval_state.h gh-131238: Remove pycore_lock.h includes (#131483) 2025-03-19 23:46:25 +00:00
pycore_code.h [3.14] gh-132775: Unrevert "Add _PyCode_VerifyStateless()" (gh-133625) 2025-05-08 00:00:33 +00:00
pycore_codecs.h gh-131238: Remove pycore_lock.h includes (#131483) 2025-03-19 23:46:25 +00:00
pycore_compile.h gh-126835: Rename ast_opt.c to ast_preprocess.c and related stuff after moving const folding to the peephole optimizier (#131830) 2025-05-04 21:07:35 +03:00
pycore_complexobject.h gh-128813: hide mixed-mode functions for complex arithmetic from C-API (#131703) 2025-04-22 14:18:18 +02:00
pycore_condvar.h gh-131082: Add missing guards for WIN32_LEAN_AND_MEAN (#131044) 2025-03-11 12:33:01 +01:00
pycore_context.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_critical_section.h gh-131238: Remove pycore_lock.h includes (#131483) 2025-03-19 23:46:25 +00:00
pycore_crossinterp.h [3.14] gh-132775: Clean Up Cross-Interpreter Error Handling (gh-135492) 2025-06-14 02:08:25 +00:00
pycore_crossinterp_data_registry.h [3.14] gh-132775: Support Fallbacks in _PyObject_GetXIData() (gh-134418) 2025-05-21 14:47:56 +00:00
pycore_debug_offsets.h [3.14] gh-131591: Add Py_ prefix to MAX_SCRIPT_PATH_SIZE; remove unprefixed struct tag (GH-135924) (GH-135969) 2025-06-26 10:23:39 +02:00
pycore_descrobject.h gh-106320: Move _PyMethodWrapper_Type to internal C API (#107064) 2023-07-22 20:57:59 +00:00
pycore_dict.h [3.14] gh-132641: fix race in lru_cache under free-threading (GH-133787) (#133979) 2025-05-14 07:11:38 +00:00
pycore_dict_state.h gh-124296: Remove private dictionary version tag (PEP 699) (#124472) 2024-10-01 12:39:56 -04:00
pycore_dtoa.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_emscripten_signal.h GH-108614: Unbreak emscripten build (GH-109132) 2023-09-08 17:54:45 +01:00
pycore_emscripten_trampoline.h gh-132097: use a macro for semantically casting function pointers (#132406) 2025-04-18 12:24:34 +02:00
pycore_exceptions.h gh-129668: Fix thread-safety of MemoryError freelist in free threaded build (gh-129704) 2025-02-06 12:38:12 -05:00
pycore_faulthandler.h gh-127604: Add C stack dumps to faulthandler (#128159) 2025-04-21 20:48:02 +01:00
pycore_fileutils.h gh-131238: Use pycore_interp_structs.h header (#131481) 2025-03-19 23:13:25 +00:00
pycore_fileutils_windows.h gh-108220: Internal header files require Py_BUILD_CORE to be defined (#108221) 2023-08-21 19:15:52 +02:00
pycore_floatobject.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_flowgraph.h gh-119744: move a few functions from compile.c to flowgraph.c (#119745) 2024-05-30 21:55:06 +01:00
pycore_format.h gh-104018: remove unused format "z" handling in string formatfloat() (#104107) 2023-05-07 10:11:42 +05:30
pycore_frame.h gh-130704: Strength reduce LOAD_FAST{_LOAD_FAST} (#130708) 2025-04-01 10:18:42 -07:00
pycore_freelist.h gh-131238: Remove includes from pycore_interp.h (#131495) 2025-03-20 11:35:23 +00:00
pycore_freelist_state.h gh-126703: Add freelist for range and range_iter objects (GH-128619) 2025-04-07 04:40:52 +08:00
pycore_function.h [3.14] gh-135755: Move PyFunction_GET_BUILTINS to the private API (GH-135938) (GH-135972) 2025-06-26 10:08:28 +00:00
pycore_gc.h gh-131238: Move _Py_VISIT_STACKREF() to pycore_stackref.h (#131560) 2025-03-21 23:24:14 +01:00
pycore_genobject.h gh-131238: Move _Py_VISIT_STACKREF() to pycore_stackref.h (#131560) 2025-03-21 23:24:14 +01:00
pycore_getopt.h bpo-36763: Cleanup precmdline in _PyCoreConfig_Read() (GH-13371) 2019-05-17 03:15:12 +02:00
pycore_gil.h gh-116322: Enable the GIL while loading C extension modules (#118560) 2024-05-06 23:07:23 -04:00
pycore_global_objects.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_global_objects_fini_generated.h [3.14] gh-91048: Fix external inspection multi-threaded performance (GH-136005) (#136080) 2025-06-28 19:12:54 +01:00
pycore_global_strings.h [3.14] gh-91048: Fix external inspection multi-threaded performance (GH-136005) (#136080) 2025-06-28 19:12:54 +01:00
pycore_hamt.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_hashtable.h gh-107211: No longer export internal functions (5) (#108423) 2023-08-24 16:06:53 +00:00
pycore_import.h gh-132775: Drop PyUnstable_InterpreterState_GetMainModule() (gh-132978) 2025-04-28 12:46:22 -06:00
pycore_importdl.h gh-122907: Fix Builds Without HAVE_DYNAMIC_LOADING Set (gh-122952) 2024-08-13 14:44:57 -06:00
pycore_index_pool.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_initconfig.h gh-130931: Add pycore_typedefs.h internal header (#131396) 2025-03-19 15:23:32 +01:00
pycore_instruction_sequence.h gh-130907: Treat all module-level annotations as conditional (#131550) 2025-04-28 06:10:28 -07:00
pycore_instruments.h gh-130931: Add pycore_typedefs.h internal header (#131396) 2025-03-19 15:23:32 +01:00
pycore_interp.h gh-131238: Remove includes from pycore_interp.h (#131495) 2025-03-20 11:35:23 +00:00
pycore_interp_structs.h [3.14] gh-91048: Refactor and optimize remote debugging module (#134652) (#134673) 2025-05-25 22:10:20 +00:00
pycore_interpframe.h GH-132508: Use tagged integers on the evaluation stack for the last instruction offset (GH-132545) 2025-04-29 18:00:35 +01:00
pycore_interpframe_structs.h gh-131238: Add pycore_interpframe_structs.h header (#131553) 2025-03-21 17:19:47 +00:00
pycore_interpolation.h gh-132661: Implement PEP 750 (#132662) 2025-04-30 11:46:41 +02:00
pycore_intrinsics.h gh-116126: Implement PEP 696 (#116129) 2024-05-03 06:17:32 -07:00
pycore_jit.h GH-131498: Remove conditional stack effects (GH-131499) 2025-03-20 15:39:38 +00:00
pycore_list.h gh-100239: specialize BINARY_OP/SUBSCR for list-slice (#132626) 2025-05-01 10:28:52 +00:00
pycore_llist.h gh-111964: Implement stop-the-world pauses (gh-112471) 2024-01-23 11:08:23 -07:00
pycore_lock.h gh-128002: use per threads tasks linked list in asyncio (#128869) 2025-02-06 19:51:07 +01:00
pycore_long.h [3.14] gh-133583: Add support for fixed size unsigned integers in argument parsing (GH-133584) (GH-133650) 2025-05-08 09:54:44 +00:00
pycore_magic_number.h [3.14] gh-134889: Fix handling of a few opcodes when optimizing LOAD_FAST (#134958) (#135187) 2025-06-05 13:06:51 -07:00
pycore_memoryobject.h gh-132776: Revert Moving memoryview XIData Code to memoryobject.c (gh-132960) 2025-04-25 16:43:50 +00:00
pycore_mimalloc.h gh-122584: Import mimalloc headers in a C++ context (#122587) 2024-08-15 09:01:01 -04:00
pycore_modsupport.h gh-112136: Remove unused #include "pycore_lock.h" (#127093) 2024-11-21 13:50:11 +01:00
pycore_moduleobject.h gh-132775: Add _PyModule_GetFilenameObject() and _PyModule_GetFilenameUTF8() (gh-132979) 2025-04-28 12:41:32 -06:00
pycore_namespace.h gh-107211: No longer export internal functions (4) (#107217) 2023-07-25 03:16:28 +00:00
pycore_object.h [3.14] gh-135906: Use _PyObject_CAST in internal headers (GH-135892) (GH-136392) 2025-07-07 17:21:28 +00:00
pycore_object_alloc.h gh-112529: Use GC heaps for GC allocations in free-threaded builds (gh-114157) 2024-01-21 01:14:45 +09:00
pycore_object_deferred.h gh-117139: Convert the evaluation stack to stack refs (#118450) 2024-06-27 03:10:43 +08:00
pycore_object_stack.h gh-125859: Fix crash when gc.get_objects is called during GC (#125882) 2024-10-24 09:33:11 -04:00
pycore_object_state.h gh-125604: Move _Py_AuditHookEntry, etc. Out of pycore_runtime.h (gh-125605) 2024-10-18 09:26:08 -06:00
pycore_obmalloc.h gh-92953: Improve nextpool/prevpool comment. (gh-125545) 2024-10-15 11:47:20 -07:00
pycore_obmalloc_init.h gh-113055: Use pointer for interp->obmalloc state (gh-113412) 2024-01-26 19:38:14 -08:00
pycore_opcode_metadata.h [3.14] gh-128045: Mark unknown opcodes as deopting to themselves (GH-128044) (#134228) 2025-05-19 11:09:15 -04:00
pycore_opcode_utils.h [3.14] gh-132775: Unrevert "Add _PyCode_VerifyStateless()" (gh-133625) 2025-05-08 00:00:33 +00:00
pycore_optimizer.h GH-133231: Changes to executor management to support proposed sys._jit module (GH-133287) 2025-05-04 10:05:35 +01:00
pycore_parking_lot.h gh-110850: Cleanup pycore_time.h includes (#115724) 2024-02-20 16:50:43 +00:00
pycore_parser.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_pathconfig.h gh-107211: No longer export internal functions (6) (#108424) 2023-08-24 17:28:35 +02:00
pycore_pyarena.h gh-107211: Fix test_peg_generator (#108435) 2023-08-24 17:47:44 +00:00
pycore_pyatomic_ft_wrappers.h gh-131757: allow lru_cache functions to execute concurrently (#131758) 2025-04-14 18:31:19 +02:00
pycore_pybuffer.h gh-76785: Rename _xxsubinterpreters to _interpreters (gh-117791) 2024-04-24 16:18:24 +00:00
pycore_pyerrors.h [3.14] gh-132775: Use _PyFunction_VerifyStateless() and _PyCode_VerifyStateless() (gh-134465) 2025-05-21 20:43:29 +00:00
pycore_pyhash.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_pylifecycle.h gh-131238: Cleanup pycore_runtime.h includes (#131486) 2025-03-20 00:47:30 +00:00
pycore_pymath.h gh-120026: soft deprecate Py_HUGE_VAL macro (#120027) 2024-11-01 22:04:31 +00:00
pycore_pymem.h [3.14] GH-133136: Revise QSBR to reduce excess memory held (gh-135473) (#135912) 2025-07-08 10:58:01 -07:00
pycore_pymem_init.h gh-115103: Implement delayed free mechanism for free-threaded builds (#115367) 2024-02-20 13:04:37 -05:00
pycore_pystate.h [3.14] gh-130396: Move PYOS_LOG2_STACK_MARGIN to internal headers (GH-135928) (#136173) 2025-07-01 13:44:32 +00:00
pycore_pystats.h gh-108753: Enhance pystats (#108754) 2023-09-06 15:54:59 +00:00
pycore_pythonrun.h [3.14] gh-130396: Move PYOS_LOG2_STACK_MARGIN to internal headers (GH-135928) (#136173) 2025-07-01 13:44:32 +00:00
pycore_pythread.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_qsbr.h [3.14] GH-133136: Revise QSBR to reduce excess memory held (gh-135473) (#135912) 2025-07-08 10:58:01 -07:00
pycore_range.h gh-89189: More compact range iterator (GH-27986) 2022-11-30 23:04:30 +02:00
pycore_runtime.h gh-131238: Use pycore_interp_structs.h header (#131481) 2025-03-19 23:13:25 +00:00
pycore_runtime_init.h Remove duplicate includes: Include/internal/ (#132624) 2025-05-06 02:08:42 +01:00
pycore_runtime_init_generated.h [3.14] gh-91048: Fix external inspection multi-threaded performance (GH-136005) (#136080) 2025-06-28 19:12:54 +01:00
pycore_runtime_structs.h gh-131238: Add pycore_interpframe_structs.h header (#131553) 2025-03-21 17:19:47 +00:00
pycore_semaphore.h gh-131082: Add missing guards for WIN32_LEAN_AND_MEAN (#131044) 2025-03-11 12:33:01 +01:00
pycore_setobject.h gh-130312: SET_ADD should not lock (#130136) 2025-03-21 15:58:32 -07:00
pycore_signal.h gh-109693: Use pyatomic.h for signal module (gh-110480) 2023-10-10 08:26:29 +09:00
pycore_sliceobject.h GH-115802: JIT "small" code for Windows (GH-115964) 2024-02-29 08:11:28 -08:00
pycore_stackref.h [3.14] gh-135906: Use _PyObject_CAST in internal headers (GH-135892) (GH-136392) 2025-07-07 17:21:28 +00:00
pycore_stats.h GH-131238: More refactoring of core header files (GH-131351) 2025-03-17 14:41:05 +00:00
pycore_strhex.h gh-107211: No longer export pycore_strhex.h functions (#108229) 2023-08-21 18:12:22 +00:00
pycore_structs.h GH-131498: Cases generator: manage stacks automatically (GH-132074) 2025-04-04 17:59:36 +01:00
pycore_structseq.h gh-107211: No longer export internal functions (4) (#107217) 2023-07-25 03:16:28 +00:00
pycore_symtable.h gh-130924: Do not create cells for usages of names in local annotations (#131843) 2025-03-29 21:15:48 +00:00
pycore_sysmodule.h gh-131591: Implement PEP 768 (#131937) 2025-04-03 16:20:01 +01:00
pycore_template.h gh-132661: Implement PEP 750 (#132662) 2025-04-30 11:46:41 +02:00
pycore_time.h gh-131238: Use pycore_interp_structs.h header (#131481) 2025-03-19 23:13:25 +00:00
pycore_token.h gh-132661: Implement PEP 750 (#132662) 2025-04-30 11:46:41 +02:00
pycore_traceback.h gh-127604: Add C stack dumps to faulthandler (#128159) 2025-04-21 20:48:02 +01:00
pycore_tracemalloc.h gh-129185: Use PyMutex in tracemalloc (#129246) 2025-01-24 11:25:24 +01:00
pycore_tstate.h gh-131586: Avoid refcount contention in some "special" calls (#131588) 2025-03-26 14:38:47 -04:00
pycore_tuple.h gh-131525: Cache the result of tuple_hash (#131529) 2025-03-27 09:57:06 -04:00
pycore_typedefs.h gh-130931: Add pycore_typedefs.h internal header (#131396) 2025-03-19 15:23:32 +01:00
pycore_typeobject.h Revert gh-127266: avoid data races when updating type slots (gh-131174) (gh-133129) 2025-04-28 23:38:29 -07:00
pycore_typevarobject.h gh-119180: Add evaluate functions for type params and type aliases (#122212) 2024-07-27 17:24:10 +00:00
pycore_ucnhash.h gh-111972: Make Unicode name C APIcapsule initialization thread-safe (#112249) 2023-11-30 11:12:49 +01:00
pycore_unicodeobject.h [3.14] gh-133767: Fix use-after-free in the unicode-escape decoder with an error handler (GH-129648) (GH-133942) 2025-05-13 16:25:08 +03:00
pycore_unicodeobject_generated.h [3.14] gh-91048: Fix external inspection multi-threaded performance (GH-136005) (#136080) 2025-06-28 19:12:54 +01:00
pycore_unionobject.h gh-105499: Merge typing.Union and types.UnionType (#105511) 2025-03-04 11:44:19 -08:00
pycore_uniqueid.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_uop_ids.h GH-131798: Split CALL_LEN into several uops (GH-133180) 2025-05-05 14:31:48 -07:00
pycore_uop_metadata.h Revert "gh-133395: add option for extension modules to specialize BINARY_OP/SUBSCR, apply to arrays (#133396)" (#133498) 2025-05-06 13:12:26 +03:00
pycore_warnings.h GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
pycore_weakref.h [3.14] gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614) (#136119) 2025-06-30 15:59:22 +02:00