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gh-144991: Use runtime JIT threshold in _testinternalcapi by corona10 · Pull Request #145496 · python/cpython · GitHub

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gh-144991: Use runtime JIT threshold in _testinternalcapi #145496

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Merged
corona10 merged 4 commits into from
Mar 5, 2026
+6 −3
Conversation 8 Commits 4 Checks 65 Files changed 2
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gh-144991: Use runtime JIT threshold in _testinternalcapi #145496

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8c296a2
gh-144991: Use runtime JIT threshold in _testinternalcapi
corona10 Mar 4, 2026
9215b43
Address code review
corona10 Mar 4, 2026
1065273
Update Modules/_testinternalcapi.c
corona10 Mar 4, 2026
3b855ee
Address code review
corona10 Mar 4, 2026
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2 changes: 1 addition & 1 deletion Include/internal/pycore_interp_structs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -496,7 +496,7 @@ struct _py_func_state {

/* For now we hard-code this to a value for which we are confident
all the static builtin types will fit (for all builds). */
#define _Py_MAX_MANAGED_STATIC_BUILTIN_TYPES 201
#define _Py_MAX_MANAGED_STATIC_BUILTIN_TYPES 202

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Why was this changed?

vstinner Mar 4, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Because a new static type was added recently, and JIT tests crash or fail with an assertion error without this change: #145496 (comment)
#define _Py_MAX_MANAGED_STATIC_EXT_TYPES 10
#define _Py_MAX_MANAGED_STATIC_TYPES \
(_Py_MAX_MANAGED_STATIC_BUILTIN_TYPES + _Py_MAX_MANAGED_STATIC_EXT_TYPES)
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7 changes: 5 additions & 2 deletions Modules/_testinternalcapi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2966,6 +2966,8 @@ static PyMethodDef module_functions[] = {
static int
module_exec(PyObject *module)
{
PyInterpreterState *interp = PyInterpreterState_Get();

if (_PyTestInternalCapi_Init_Lock(module) < 0) {
return 1;
}
Expand Down Expand Up @@ -3007,9 +3009,10 @@ module_exec(PyObject *module)
return 1;
}

// + 1 more due to one loop spent on tracing.
unsigned long threshold = interp->opt_config.jump_backward_initial_value + 2;
if (PyModule_Add(module, "TIER2_THRESHOLD",
// + 1 more due to one loop spent on tracing.
PyLong_FromLong(JUMP_BACKWARD_INITIAL_VALUE + 2)) < 0) {
PyLong_FromUnsignedLong(threshold)) < 0) {
return 1;
}

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