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gh-141504: Move PYTHON_UOPS_OPTIMIZE to policy object by corona10 · Pull Request #144082 · python/cpython · GitHub

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gh-141504: Move PYTHON_UOPS_OPTIMIZE to policy object #144082

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Merged
Fidget-Spinner merged 4 commits into from
Jan 20, 2026
Conversation 1 Commits 4 Checks 65 Files changed
Merged

gh-141504: Move PYTHON_UOPS_OPTIMIZE to policy object #144082

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gh-141504: Move PYTHON_UOPS_OPTIMIZE to policy object
corona10 Jan 20, 2026
d218084
nit
corona10 Jan 20, 2026
6e5bb6f
fix
corona10 Jan 20, 2026
15b759d
fix
corona10 Jan 20, 2026
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1 change: 1 addition & 0 deletions Include/internal/pycore_interp_structs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -411,6 +411,7 @@ typedef struct _PyOptimizationConfig {

// Optimization flags
bool specialization_enabled;
bool uops_optimize_enabled;
} _PyOptimizationConfig;

struct
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6 changes: 1 addition & 5 deletions Python/optimizer.c
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Expand Up @@ -1514,11 +1514,7 @@ uop_optimize(
_PyBloomFilter *dependencies = &_tstate->jit_tracer_state->prev_state.dependencies;
_PyUOpInstruction *buffer = _tstate->jit_tracer_state->code_buffer;
OPT_STAT_INC(attempts);
char *env_var = Py_GETENV("PYTHON_UOPS_OPTIMIZE");
bool is_noopt = true;
if (env_var == NULL || *env_var == '\0' || *env_var > '0') {
is_noopt = false;
}
bool is_noopt = !tstate->interp->opt_config.uops_optimize_enabled;
int curr_stackentries = _tstate->jit_tracer_state->initial_state.stack_depth;
int length = _tstate->jit_tracer_state->prev_state.code_curr_size;
if (length <= CODE_SIZE_NO_PROGRESS) {
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8 changes: 8 additions & 0 deletions Python/pystate.c
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Original file line number Diff line number Diff line change
Expand Up @@ -522,6 +522,13 @@ is_env_enabled(const char *env_name)
return env && *env != '\0' && *env != '0';
}

static inline bool
is_env_disabled(const char *env_name)
{
char *env = Py_GETENV(env_name);
return env != NULL && *env == '0';
}

static inline void
init_policy(uint16_t *target, const char *env_name, uint16_t default_value,
long min_value, long max_value)
Expand Down Expand Up @@ -619,6 +626,7 @@ init_interpreter(PyInterpreterState *interp,
SIDE_EXIT_INITIAL_BACKOFF, 0, MAX_BACKOFF);

interp->opt_config.specialization_enabled = !is_env_enabled("PYTHON_SPECIALIZATION_OFF");
interp->opt_config.uops_optimize_enabled = !is_env_disabled("PYTHON_UOPS_OPTIMIZE");
if (interp != &runtime->_main_interpreter) {
/* Fix the self-referential, statically initialized fields. */
interp->dtoa = (struct _dtoa_state)_dtoa_state_INIT(interp);
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