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gh-122417: Implement per-thread heap type refcounts (#122418)

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The free-threaded build partially stores heap type reference counts in
distributed manner in per-thread arrays. This avoids reference count
contention when creating or destroying instances.

Co-authored-by: Ken Jin <kenjin@python.org>
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Sam Gross 2024-08-06 14:36:57 -04:00 • committed by GitHub
parent 1429651a06
commit dc09301067
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GPG key ID: B5690EEEBB952194
18 changed files with 427 additions and 69 deletions
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Include/internal/pycore_interp.h
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@ -35,6 +35,7 @@ extern "C" {
#include "pycore_qsbr.h" // struct _qsbr_state
#include "pycore_tstate.h" // _PyThreadStateImpl
#include "pycore_tuple.h" // struct _Py_tuple_state
#include "pycore_typeid.h" // struct _Py_type_id_pool
#include "pycore_typeobject.h" // struct types_state
#include "pycore_unicodeobject.h" // struct _Py_unicode_state
#include "pycore_warnings.h" // struct _warnings_runtime_state
@ -220,6 +221,7 @@ struct _is {
#if defined(Py_GIL_DISABLED)
struct _mimalloc_interp_state mimalloc;
struct _brc_state brc; // biased reference counting state
struct _Py_type_id_pool type_ids;
PyMutex weakref_locks[NUM_WEAKREF_LIST_LOCKS];
#endif