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bpo-44338: Port LOAD_GLOBAL to PEP 659 adaptive interpreter (GH-26638)

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* Add specializations of LOAD_GLOBAL.

* Add more stats.

* Remove old opcache; it is no longer used.

* Add NEWS
This commit is contained in:
Mark Shannon 2021-06-14 11:04:09 +01:00 • committed by GitHub
parent fafcfff926
commit eecbc7c390
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9 changed files with 209 additions and 337 deletions
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25
Include/internal/pycore_code.h
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@ -48,6 +48,11 @@ typedef struct {
uint32_t dk_version_or_hint;
} _PyLoadAttrCache;
typedef struct {
uint32_t module_keys_version;
uint32_t builtin_keys_version;
} _PyLoadGlobalCache;
/* Add specialized versions of entries to this union.
*
* Do not break the invariant: sizeof(SpecializedCacheEntry) == 8
@ -62,6 +67,7 @@ typedef union {
_PyEntryZero zero;
_PyAdaptiveEntry adaptive;
_PyLoadAttrCache load_attr;
_PyLoadGlobalCache load_global;
} SpecializedCacheEntry;
#define INSTRUCTIONS_PER_ENTRY (sizeof(SpecializedCacheEntry)/sizeof(_Py_CODEUNIT))
@ -254,8 +260,6 @@ PyAPI_FUNC(PyCodeObject *) _PyCode_New(struct _PyCodeConstructor *);
/* Private API */
int _PyCode_InitOpcache(PyCodeObject *co);
/* Getters for internal PyCodeObject data. */
PyAPI_FUNC(PyObject *) _PyCode_GetVarnames(PyCodeObject *);
PyAPI_FUNC(PyObject *) _PyCode_GetCellvars(PyCodeObject *);
@ -318,24 +322,25 @@ cache_backoff(_PyAdaptiveEntry *entry) {
/* Specialization functions */
int _Py_Specialize_LoadAttr(PyObject *owner, _Py_CODEUNIT *instr, PyObject *name, SpecializedCacheEntry *cache);
int _Py_Specialize_LoadGlobal(PyObject *globals, PyObject *builtins, _Py_CODEUNIT *instr, PyObject *name, SpecializedCacheEntry *cache);
#define SPECIALIZATION_STATS 0
#if SPECIALIZATION_STATS
typedef struct _specialization_stats {
typedef struct _stats {
uint64_t specialization_success;
uint64_t specialization_failure;
uint64_t loadattr_hit;
uint64_t loadattr_deferred;
uint64_t loadattr_miss;
uint64_t loadattr_deopt;
uint64_t hit;
uint64_t deferred;
uint64_t miss;
uint64_t deopt;
} SpecializationStats;
extern SpecializationStats _specialization_stats;
#define STAT_INC(name) _specialization_stats.name++
extern SpecializationStats _specialization_stats[256];
#define STAT_INC(opname, name) _specialization_stats[opname].name++
void _Py_PrintSpecializationStats(void);
#else
#define STAT_INC(name) ((void)0)
#define STAT_INC(opname, name) ((void)0)
#endif