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gh-109329: Count tier2 opcode misses (#110561)

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This keeps a separate 'miss' counter for each micro-opcode, incremented whenever a guard uop takes a deoptimization side exit.
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Michael Droettboom 2023-10-30 20:02:45 -04:00 • committed by GitHub
parent c6fe0869ab
commit 84b4533e84
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5 changed files with 9 additions and 4 deletions
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3
Python/executor.c
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@ -25,6 +25,7 @@
#undef DEOPT_IF
#define DEOPT_IF(COND, INSTNAME) \
if ((COND)) { \
UOP_STAT_INC(INSTNAME, miss); \
goto deoptimize; \
}
@ -93,7 +94,7 @@ _PyUopExecute(_PyExecutorObject *executor, _PyInterpreterFrame *frame, PyObject
(int)(stack_pointer - _PyFrame_Stackbase(frame)));
pc++;
OPT_STAT_INC(uops_executed);
UOP_EXE_INC(opcode);
UOP_STAT_INC(opcode, execution_count);
#ifdef Py_STATS
trace_uop_execution_counter++;
#endif

3
Python/specialize.c
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@ -248,6 +248,9 @@ print_optimization_stats(FILE *out, OptimizationStats *stats)
if (stats->opcode[i].execution_count) {
fprintf(out, "uops[%s].execution_count : %" PRIu64 "\n", names[i], stats->opcode[i].execution_count);
}
if (stats->opcode[i].miss) {
fprintf(out, "uops[%s].specialization.miss : %" PRIu64 "\n", names[i], stats->opcode[i].miss);
}
}
for (int i = 0; i < 256; i++) {