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Add ILP problem size and objective value diagnostics #362

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Merged
fmassa merged 1 commit into from
Mar 11, 2026
Merged

Add ILP problem size and objective value diagnostics #362

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13 changes: 12 additions & 1 deletion autoparallel/optimize_sharding.py
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,8 @@ def __init__(
self.prob = pulp.LpProblem("AutoParallel", pulp.LpMinimize)
self.add_default_constraints()
t3 = time.perf_counter()
n_unique_vars = len(set(id(v) for v in self.pulp_variables.values()))
n_constraints = len(self.prob.constraints)
logger.info(
"ILP construction took %.3fs "
"(decision_vars=%.3fs, validate=%.3fs, constraints=%.3fs)",
Expand All @@ -172,6 +174,12 @@ def __init__(
t2 - t1,
t3 - t2,
)
logger.info(
"ILP problem size: %d unique vars, %d decision vars, %d constraints",
n_unique_vars,
len(self.decision_vars),
n_constraints,
)

def _get_next_name(self, prefix):
idx = self._name_counters.setdefault(prefix, 0)
Expand Down Expand Up @@ -681,7 +689,10 @@ def get_solution(self, verbose=False):
t0 = time.perf_counter()
self._set_objective()
self._solve(verbose)
logger.info("ILP solve took %.3fs", time.perf_counter() - t0)
obj_value = pulp.value(self.prob.objective)
logger.info(
"ILP solve took %.3fs (objective=%.4f)", time.perf_counter() - t0, obj_value
)
return self._extract_and_validate_solution()

# ---- Logging ----
Expand Down