sunjiweiswift commented on a change in pull request #8497:
URL: https://github.com/apache/tvm/pull/8497#discussion_r672911959
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File path: src/runtime/graph_executor/graph_executor.cc
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@@ -139,6 +156,30 @@ void GraphExecutor::SetInputZeroCopy(int index, DLTensor*
data_ref) {
t->data = data_ref->data;
}
}
+/*!
+ * \brief set index-th output to the graph without copying the data.
+ * \param index The output index.
+ * \param data_ref The output data that is referred.
+ */
+void GraphExecutor::SetOutputZeroCopy(int index, DLTensor* data_ref) {
+ ICHECK_LT(static_cast<size_t>(index), outputs_.size());
+ uint32_t eid = this->entry_id(outputs_[index]);
+ const DLTensor* old_t = data_entry_[eid].operator->();
+
+ // check the consistency of output
+ ICHECK_EQ(data_alignment_[eid], details::GetDataAlignment(*data_ref));
+ ICHECK_EQ(reinterpret_cast<size_t>(data_ref->data) % kAllocAlignment, 0);
+ ICHECK_EQ(old_t->ndim, static_cast<size_t>(data_ref->ndim));
+ ICHECK_EQ(old_t->device.device_type, data_ref->device.device_type);
+ ICHECK_EQ(old_t->device.device_id, data_ref->device.device_id);
+ for (auto i = 0; i < data_ref->ndim; ++i) {
+ ICHECK_EQ(old_t->shape[i], data_ref->shape[i]);
+ }
+
+ // Update the data pointer for output op
+ ICHECK_LT(static_cast<size_t>(index), output_dltensors_.size());
+ output_dltensors_[index]->data = data_ref->data;
Review comment:
// Update the input of the op connected to the output
for (auto node : nodes_) {
auto it = std::find(node.inputs.begin(), node.inputs.end(), output_node);
if (it != node.inputs.end()) {
int input_nid = GetInputIndex(node.name);
int index = it - node.inputs.begin();
uint32_t eid = this->entry_id(input_nodes_[input_nid], index);
for (DLTensor* t : input_dltensors_[eid]) {
t->data = data_ref->data;
}
}
}
Can it sloved?sorry I don't have the test case
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