comaniac commented on issue #4280: [tvm][runtime] A minimum runtime for external library URL: https://github.com/apache/incubator-tvm/pull/4280#issuecomment-553048433 @tqchen could you help review again? Here is a short summary of the current runtime after your suggestions: * The runtime takes only one .so file including host and external kernels. * The runtime is now unified with `DSOModule` so backend developers don't need to implement their own runtime (and `GetFunction`) anymore. Instead, they need to unpack `TVMValue` in the generated kernels. * The [example](https://github.com/apache/incubator-tvm/pull/4280/files#diff-aab1542f9a9fec245df5ae78088f43ffR253) in this PR demonstrates a case that user backend will generate third-party library calls. This is applicable to runtime-less libraries such as MKL-DNN. * For the external backend that has a runtime engine such as TRT, we can still codegen external functions like [this example](https://github.com/apache/incubator-tvm/pull/4280/files#diff-aab1542f9a9fec245df5ae78088f43ffR27), construct the subgraph in that function, and invoke the TRT engine to execute it on the fly. We will refine the other codegen PR based on this one after merging.
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