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bpo-46072: Add some object layout and allocation stats (GH-31051)

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Mark Shannon 2022-02-01 15:05:18 +00:00 • committed by GitHub
parent 913e340a32
commit 48be46ec1f
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5 changed files with 51 additions and 1 deletions
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12
Objects/dictobject.c
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@ -114,6 +114,7 @@ As a consequence of this, split keys have a maximum size of 16.
#include "Python.h"
#include "pycore_bitutils.h" // _Py_bit_length
#include "pycore_call.h" // _PyObject_CallNoArgs()
#include "pycore_code.h" // stats
#include "pycore_dict.h" // PyDictKeysObject
#include "pycore_gc.h" // _PyObject_GC_IS_TRACKED()
#include "pycore_object.h" // _PyObject_GC_TRACK()
@ -4990,6 +4991,7 @@ _PyObject_InitializeDict(PyObject *obj)
return 0;
}
if (tp->tp_flags & Py_TPFLAGS_MANAGED_DICT) {
OBJECT_STAT_INC(new_values);
return init_inline_values(obj, tp);
}
PyObject *dict;
@ -5033,6 +5035,7 @@ _PyObject_MakeDictFromInstanceAttributes(PyObject *obj, PyDictValues *values)
{
assert(Py_TYPE(obj)->tp_flags & Py_TPFLAGS_MANAGED_DICT);
PyDictKeysObject *keys = CACHED_KEYS(Py_TYPE(obj));
OBJECT_STAT_INC(dict_materialized_on_request);
return make_dict_from_instance_attributes(keys, values);
}
@ -5051,6 +5054,14 @@ _PyObject_StoreInstanceAttribute(PyObject *obj, PyDictValues *values,
PyErr_SetObject(PyExc_AttributeError, name);
return -1;
}
#ifdef Py_STATS
if (shared_keys_usable_size(keys) > 14) {
OBJECT_STAT_INC(dict_materialized_too_big);
}
else {
OBJECT_STAT_INC(dict_materialized_new_key);
}
#endif
PyObject *dict = make_dict_from_instance_attributes(keys, values);
if (dict == NULL) {
return -1;
@ -5183,6 +5194,7 @@ PyObject_GenericGetDict(PyObject *obj, void *context)
PyObject **dictptr = _PyObject_ManagedDictPointer(obj);
if (*values_ptr) {
assert(*dictptr == NULL);
OBJECT_STAT_INC(dict_materialized_on_request);
*dictptr = dict = make_dict_from_instance_attributes(CACHED_KEYS(tp), *values_ptr);
if (dict != NULL) {
*values_ptr = NULL;