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Add gemma4 OpenVINO NPU support #746

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eb70cad
Fix Gemma4 OpenVINO NPU export
xiaoyu-work Sep 23, 2026
71a85e4
Ignore redundant Gemma4 shared-KV weights
xiaoyu-work Sep 23, 2026
cc98230
Keep Gemma4 OpenVINO handling local
xiaoyu-work Sep 23, 2026
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37 changes: 26 additions & 11 deletions src/mobius/_builder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -201,14 +201,17 @@ def build_from_module(

def _maybe_apply_opset_lowering(package: ModelPackage, execution_provider: str) -> None:
"""Lower default-domain opset 24 to 23 for sub-models where it is safe."""
if not flags.ort_lower_opset_for_ep:
if not flags.ort_lower_opset_for_ep and execution_provider != "openvino":
return
if execution_provider in ("default", "cpu"):
return
for name, model in package.items():
if "" not in model.graph.opset_imports:
continue
if _graph_requires_opset24(model.graph):
functions = list(model.functions.values())
if _graph_requires_opset24(model.graph) or any(
_graph_requires_opset24(function) for function in functions
):
logger.info(
"Skipped opset→23 lowering for '%s' (EP=%s): graph uses "
"opset-24-only ops (TensorScatter / Attention nonpad_kv_seqlen). "
Expand All @@ -219,15 +222,27 @@ def _maybe_apply_opset_lowering(package: ModelPackage, execution_provider: str)
continue
original = model.graph.opset_imports[""]
model.graph.opset_imports[""] = 23
logger.warning(
"Lowered opset %d→23 for '%s' (EP=%s). "
"ORT does not yet register opset %d kernels for this EP. "
"Track https://github.com/microsoft/onnxruntime/issues/27729",
original,
name,
execution_provider,
original,
)
for function in functions:
if "" in function.opset_imports:
function.opset_imports[""] = 23
if execution_provider == "openvino":
logger.info(
"Lowered opset %d→23 for '%s' (EP=%s) to avoid the OpenVINO "
"opset-24 Attention mask Pad.",
original,
name,
execution_provider,
)
else:
logger.warning(
"Lowered opset %d→23 for '%s' (EP=%s). "
"ORT does not yet register opset %d kernels for this EP. "
"Track https://github.com/microsoft/onnxruntime/issues/27729",
original,
name,
execution_provider,
original,
)


def _graph_requires_opset24(graph: ir.Graph) -> bool:
Expand Down
11 changes: 11 additions & 0 deletions src/mobius/_builder_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -183,3 +183,14 @@ def test_maybe_apply_opset_lowering_skipped_when_flag_disabled(
_maybe_apply_opset_lowering(pkg, execution_provider="cuda")

assert pkg["embedding"].graph.opset_imports[""] == 24


def test_maybe_apply_opset_lowering_required_by_openvino(
monkeypatch: pytest.MonkeyPatch,
) -> None:
monkeypatch.setattr(flags, "ort_lower_opset_for_ep", False)
pkg = ModelPackage({"decoder": _model_with(_standard_nodes())})

_maybe_apply_opset_lowering(pkg, execution_provider="openvino")

assert pkg["decoder"].graph.opset_imports[""] == 23
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