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Use user-supplied external initializer in place when already on the planned device #29013

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Merged
Tianlei Wu (tianleiwu) merged 1 commit into from
Jun 12, 2026
Merged

Use user-supplied external initializer in place when already on the planned device #29013

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8 changes: 6 additions & 2 deletions onnxruntime/core/framework/session_state_utils.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -392,8 +392,12 @@ common::Status SaveInitializedTensors(
if (OrtValue ort_value_from_graph;
graph.GetOrtValueInitializer(name, ort_value_from_graph)) {
const auto& memory_info = (alloc != nullptr) ? alloc->Info() : memory_buffer->GetAllocInfo();
if (memory_info.device == default_cpu_device) {
// This is on CPU use directly from the graph
const auto& graph_value_device = ort_value_from_graph.Get<Tensor>().Location().device;
if (memory_info.device == default_cpu_device || graph_value_device == memory_info.device) {
// Either the initializer is planned on CPU, or the user-supplied initializer (e.g. from
// AddExternalInitializers) already lives on the planned device. In both cases use it in
// place: no per-session device allocation or copy, and the underlying buffer can be
// shared across sessions that supply the same OrtValue (matching the AddInitializer path).
ort_value = std::move(ort_value_from_graph);
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} else {
TensorShape tensor_shape = utils::GetTensorShapeFromTensorProto(tensor_proto);
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