8000 bpo-46564: Optimize ``super().meth()`` calls via adaptive superinstructions by Fidget-Spinner · Pull Request #30992 · python/cpython · GitHub
[go: up one dir, main page]
Skip to content

bpo-46564: Optimize super().meth() calls via adaptive superinstructions #30992

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 11 commits into from
Closed

bpo-46564: Optimize super().meth() calls via adaptive superinstructions #30992

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
11 commits
Select commit Hold shift + click to select a range
3b12d1b
Near zero-cost super().meth() calls
Fidget-Spinner Jan 28, 2022
5b7a98d
remove py_stats
Fidget-Spinner Jan 28, 2022
efb0ae3
Add vladima to co-authors
Fidget-Spinner Jan 28, 2022
e037a56
Merge remote-tracking branch 'upstream/main' into zero_cost_super
Fidget-Spinner Jan 28, 2022
9d64819
fix merge errors
Fidget-Spinner Jan 28, 2022
ac19aa1
Update test_frozenmain.h
Fidget-Spinner Jan 28, 2022
1f9bb6c
fix formatting, correct specialization
Fidget-Spinner Jan 28, 2022
f4cd3f9
work with new call convention
Fidget-Spinner Jan 28, 2022
19880a9
partially address review: fix tests, add asserts, add cache modificat…
Fidget-Spinner Jan 29, 2022
696a0e8
fix refleak
Fidget-Spinner Jan 29, 2022
01202ee
Merge remote-tracking branch 'upstream/main' into zero_cost_super
Fidget-Spinner Feb 1, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Prev Previous commit
Next Next commit
partially address review: fix tests, add asserts, add cache modificat… 
…ion guards
  • Loading branch information
@Fidget-Spinner
Fidget-Spinner committed Jan 29, 2022
commit 19880a919812b51167981fef4e08d6ec64730028
6 changes: 5 additions & 1 deletion Objects/typeobject.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8929,7 +8929,11 @@ do_super_lookup(superobject *su, PyTypeObject *su_type, PyObject *su_obj,
Py_DECREF(mro);

skip:
assert(su != NULL);
/* only happens when using manual _PySuper_Lookup, never happens in super_getattro */
if (su == NULL) {
PyErr_BadInternalCall();
return NULL;
}
return PyObject_GenericGetAttr((PyObject *)su, name);
}

Expand Down
12 changes: 8 additions & 4 deletions Python/ceval.c
View file
Open in desktop
10000
Original file line number Diff line number Diff line change
Expand Up @@ -1361,6 +1361,7 @@ eval_frame_handle_pending(PyThreadState *tstate)

/* The integer overflow is checked by an assertion below. */
#define INSTR_OFFSET() ((int)(next_instr - first_instr))
#define NEXT_INSTR_OFFSET() ((int)(next_instr+1 - first_instr))
#define NEXTOPARG() do { \
_Py_CODEUNIT word = *next_instr; \
opcode = _Py_OPCODE(word); \
Expand Down Expand Up @@ -1486,6 +1487,9 @@ eval_frame_handle_pending(PyThreadState *tstate)
#define GET_CACHE() \
_GetSpecializedCacheEntryForInstruction(first_instr, INSTR_OFFSET(), oparg)

# define GET_NEXT_INSTR_CACHE() \
_GetSpecializedCacheEntryForInstruction(first_instr, NEXT_INSTR_OFFSET(), \
_Py_OPARG(*next_instr))

#define DEOPT_IF(cond, instname) if (cond) { goto instname ## _miss; }

Expand Down Expand Up @@ -5078,8 +5082,8 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, InterpreterFrame *frame, int thr
_PyAdaptiveEntry *cache0 = &caches[0].adaptive;
_PyObjectCache *cache1 = &caches[-1].obj;
_PyAdaptiveEntry *lm_adaptive = &caches[-2].adaptive;
int nargs = call_shape.total_args;
assert(nargs == 0);
assert(lm_adaptive == &GET_NEXT_INSTR_CACHE()[0].adaptive);
assert(call_shape.total_args == 0);

/* CALL_NO_KW_SUPER */
PyObject *su_obj;
Expand Down Expand Up @@ -5119,8 +5123,8 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, InterpreterFrame *frame, int thr
_PyAdaptiveEntry *cache0 = &caches[0].adaptive;
_PyObjectCache *cache1 = &caches[-1].obj;
_PyAdaptiveEntry *lm_adaptive = &caches[-2].adaptive;
int nargs = call_shape.total_args;
assert(nargs == 2);
assert(lm_adaptive == &GET_NEXT_INSTR_CACHE()[0].adaptive);
assert(call_shape.total_args == 2);
assert(call_shape.kwnames == NULL);

/* CALL_NO_KW_SUPER */
Expand Down
11 changes: 10 additions & 1 deletion Python/specialize.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -962,6 +962,12 @@ _Py_Specialize_LoadMethod(PyObject *owner, _Py_CODEUNIT *instr, PyObject *name,
_PyObjectCache *cache2 = &cache[-2].obj;

PyTypeObject *owner_cls = Py_TYPE(owner);
_Py_CODEUNIT prev_instr = _Py_OPCODE(instr[-1]);
if (prev_instr == CALL_NO_KW_SUPER_0__LOAD_METHOD_CACHED ||
prev_instr == CALL_NO_KW_SUPER_2__LOAD_METHOD_CACHED) {
/* Our own cache entries are already being used by superinstructions. */
goto fail;
}
if (PyModule_CheckExact(owner)) {
int err = specialize_module_load_attr(owner, instr, name, cache0, cache1,
LOAD_METHOD, LOAD_METHOD_MODULE);
Expand Down Expand Up @@ -1378,6 +1384,10 @@ specialize_class_call(
/* Adaptive super instruction of CALL and LOAD_METHOD_ADAPTIVE. */
if (tp == &PySuper_Type &&
kwnames == NULL &&
/* Important: this also protects us from accidentally overriding a
the next specialized instruction's cache. We can only use the
subsequent LOAD_METHOD cache if it hasn't specialized yet.
*/
_Py_OPCODE(instr[1]) == LOAD_METHOD_ADAPTIVE &&
_Py_OPCODE(instr[-1]) == PRECALL_FUNCTION &&
(nargs == 0 || nargs == 2)) {
Expand Down Expand Up @@ -1430,7 +1440,6 @@ specialize_class_call(
SPEC_FAIL_CALL_STR : SPEC_FAIL_CLASS_NO_VECTORCALL);
return -1;
}

SPECIALIZATION_FAIL(CALL, SPEC_FAIL_CLASS_MUTABLE);
return -1;
}
Expand Down
0