Thank you @hht
This is very useful. I have two follow up questions.
1) what is the purpose of external_mods in the LoweredOutput structure?
2) Ia m wondering if I can get more details about how the CodeGen in TVM works?
I mean what is the sequence. I know it starts from Relay, and I am not sure if
I understand the rest of the steps that lowers the Relay IR to target HW object
code?
[quote="hht, post:9, topic:6572"]
```
struct LoweredOutput {
std::string graph_json;
Map<std::string, IRModule> lowered_funcs;
Array<tvm::runtime::Module> external_mods;
std::unordered_map<std::string, tvm::runtime::NDArray> params;
};
```
And the IRModule shown above may have something to do with parallelism. And
IRModule is something just like a lower function but not a module.
```
struct GraphCodegen {
public:
GraphCodegen() {
auto pf = GetPackedFunc("relay.build_module._GraphRuntimeCodegen");
mod = (*pf)();
}
...
```
In build_module.cc, the lowered_funcs have been transformed into module.
[/quote]
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