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gh-112075: use per-thread dict version pool (#118676)

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use thread state set of dict versions
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Dino Viehland 2024-05-06 17:22:26 -07:00 • committed by GitHub
parent 723d4d2fe8
commit ff6cbb2503
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5 changed files with 70 additions and 3 deletions
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1
Include/cpython/pystate.h
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@ -188,6 +188,7 @@ struct _ts {
PyObject *previous_executor;
uint64_t dict_global_version;
};
#ifdef Py_DEBUG

21
Include/internal/pycore_dict.h
View file

@ -221,8 +221,25 @@ static inline PyDictUnicodeEntry* DK_UNICODE_ENTRIES(PyDictKeysObject *dk) {
#define DICT_WATCHER_AND_MODIFICATION_MASK ((1 << (DICT_MAX_WATCHERS + DICT_WATCHED_MUTATION_BITS)) - 1)
#ifdef Py_GIL_DISABLED
#define DICT_NEXT_VERSION(INTERP) \
(_Py_atomic_add_uint64(&(INTERP)->dict_state.global_version, DICT_VERSION_INCREMENT) + DICT_VERSION_INCREMENT)
#define THREAD_LOCAL_DICT_VERSION_COUNT 256
#define THREAD_LOCAL_DICT_VERSION_BATCH THREAD_LOCAL_DICT_VERSION_COUNT * DICT_VERSION_INCREMENT
static inline uint64_t
dict_next_version(PyInterpreterState *interp)
{
PyThreadState *tstate = PyThreadState_GET();
uint64_t cur_progress = (tstate->dict_global_version &
(THREAD_LOCAL_DICT_VERSION_BATCH - 1));
if (cur_progress == 0) {
uint64_t next = _Py_atomic_add_uint64(&interp->dict_state.global_version,
THREAD_LOCAL_DICT_VERSION_BATCH);
tstate->dict_global_version = next;
}
return tstate->dict_global_version += DICT_VERSION_INCREMENT;
}
#define DICT_NEXT_VERSION(INTERP) dict_next_version(INTERP)
#else
#define DICT_NEXT_VERSION(INTERP) \