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bpo-45885: Add more stats for COMPARE_OP in specialize.c (GH-31040)

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Dennis Sweeney 2022-02-03 08:32:52 -05:00 committed by GitHub
parent e0433c1e70
commit 674ab66ebd
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2 changed files with 48 additions and 2 deletions
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1
Misc/NEWS.d/next/Core and Builtins/2022-02-01-01-17-28.bpo-45885.CjyNf_.rst Normal file
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@ -0,0 +1 @@
Added more fined-grained specialization failure stats regarding the ``COMPARE_OP`` bytecode.

49
Python/specialize.c
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@ -547,6 +547,14 @@ initial_counter_value(void) {
#define SPEC_FAIL_STRING_COMPARE 13
#define SPEC_FAIL_NOT_FOLLOWED_BY_COND_JUMP 14
#define SPEC_FAIL_BIG_INT 15
#define SPEC_FAIL_COMPARE_BYTES 16
#define SPEC_FAIL_COMPARE_TUPLE 17
#define SPEC_FAIL_COMPARE_LIST 18
#define SPEC_FAIL_COMPARE_SET 19
#define SPEC_FAIL_COMPARE_BOOL 20
#define SPEC_FAIL_COMPARE_BASEOBJECT 21
#define SPEC_FAIL_COMPARE_FLOAT_LONG 22
#define SPEC_FAIL_COMPARE_LONG_FLOAT 23
/* FOR_ITER */
#define SPEC_FAIL_ITER_GENERATOR 10
@ -1764,6 +1772,43 @@ success:
adaptive->counter = initial_counter_value();
}
#ifdef Py_STATS
static int
compare_op_fail_kind(PyObject *lhs, PyObject *rhs)
{
if (Py_TYPE(lhs) != Py_TYPE(rhs)) {
if (PyFloat_CheckExact(lhs) && PyLong_CheckExact(rhs)) {
return SPEC_FAIL_COMPARE_FLOAT_LONG;
}
if (PyLong_CheckExact(lhs) && PyFloat_CheckExact(rhs)) {
return SPEC_FAIL_COMPARE_LONG_FLOAT;
}
return SPEC_FAIL_DIFFERENT_TYPES;
}
if (PyBytes_CheckExact(lhs)) {
return SPEC_FAIL_COMPARE_BYTES;
}
if (PyTuple_CheckExact(lhs)) {
return SPEC_FAIL_COMPARE_TUPLE;
}
if (PyList_CheckExact(lhs)) {
return SPEC_FAIL_COMPARE_LIST;
}
if (PySet_CheckExact(lhs) || PyFrozenSet_CheckExact(lhs)) {
return SPEC_FAIL_COMPARE_SET;
}
if (PyBool_Check(lhs)) {
return SPEC_FAIL_COMPARE_BOOL;
}
if (Py_TYPE(lhs)->tp_richcompare == PyBaseObject_Type.tp_richcompare) {
return SPEC_FAIL_COMPARE_BASEOBJECT;
}
return SPEC_FAIL_OTHER;
}
#endif
static int compare_masks[] = {
// 1-bit: jump if less than
// 2-bit: jump if equal
@ -1795,7 +1840,7 @@ _Py_Specialize_CompareOp(PyObject *lhs, PyObject *rhs,
when_to_jump_mask = (1 | 2 | 4) & ~when_to_jump_mask;
}
if (Py_TYPE(lhs) != Py_TYPE(rhs)) {
SPECIALIZATION_FAIL(COMPARE_OP, SPEC_FAIL_DIFFERENT_TYPES);
SPECIALIZATION_FAIL(COMPARE_OP, compare_op_fail_kind(lhs, rhs));
goto failure;
}
if (PyFloat_CheckExact(lhs)) {
@ -1825,7 +1870,7 @@ _Py_Specialize_CompareOp(PyObject *lhs, PyObject *rhs,
goto success;
}
}
SPECIALIZATION_FAIL(COMPARE_OP, SPEC_FAIL_OTHER);
SPECIALIZATION_FAIL(COMPARE_OP, compare_op_fail_kind(lhs, rhs));
failure:
STAT_INC(COMPARE_OP, failure);
cache_backoff(adaptive);