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Classify specialization failures. Provides more useful stats, with lower overhead. #27701

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Merged
merged 3 commits into from
Aug 10, 2021
Merged

Classify specialization failures. Provides more useful stats, with lower overhead. #27701

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2fe2b1f
Classify specialization failures. Provides more useful stats, with lo…
markshannon Aug 9, 2021
4ffede1
Update summarize script to show failure kinds.
markshannon Aug 10, 2021
fe79ffc
Update test__opcode.py
markshannon Aug 10, 2021
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4 changes: 3 additions & 1 deletion Include/internal/pycore_code.h
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Original file line number Diff line number Diff line change
Expand Up @@ -305,6 +305,8 @@ int _Py_Specialize_BinarySubscr(PyObject *sub, PyObject *container, _Py_CODEUNIT
#define SPECIALIZATION_STATS_DETAILED 0
#define SPECIALIZATION_STATS_TO_FILE 0

#define SPECIALIZATION_FAILURE_KINDS 20

#if SPECIALIZATION_STATS

typedef struct _stats {
Expand All @@ -316,7 +318,7 @@ typedef struct _stats {
uint64_t deopt;
uint64_t unquickened;
#if SPECIALIZATION_STATS_DETAILED
PyObject *miss_types;
uint64_t specialization_failure_kinds[SPECIALIZATION_FAILURE_KINDS];
#endif
} SpecializationStats;

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5 changes: 2 additions & 3 deletions Lib/test/test__opcode.py
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Expand Up @@ -85,9 +85,8 @@ def test_specialization_stats(self):
stat_names + ['fails'])
for sn in stat_names:
self.assertIsInstance(stats['load_attr'][sn], int)
self.assertIsInstance(stats['load_attr']['fails'], dict)
for k,v in stats['load_attr']['fails'].items():
self.assertIsInstance(k, tuple)
self.assertIsInstance(stats['load_attr']['specialization_failure_kinds'], tuple)
for v in stats['load_attr']['specialization_failure_kinds']:
self.assertIsInstance(v, int)


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