merrymercy commented on pull request #6190:
URL: https://github.com/apache/incubator-tvm/pull/6190#issuecomment-672266466
I organized the features into 5 groups.
```
// Group 1: Computation related features
// Group 2: Buffer access related features (per buffer)
// Group 3: Arithmetic intensity related features
// Group 4: Allocation related features
// Group 5: Outer scope related features
```
The specification can be found in
`src/auto_scheduler/feature.cc::FeatureSet`.
Each group has one corresponding extraction function, they are called in the
main visitor (`PerStoreFeatureExtractor`).
```
void VisitStmt_(const BufferStoreNode* node) final {
...
// Group 1: Computation related features
ExtractComputationFeature(node, math_op_counter);
// Group 2: Buffer access related features (per buffer)
ExtractBufferAccessFeature(node, math_op_counter, &cur_compute_ops,
&compute_ops_list,
&mem_bytes_list);
// Group 3: Arithmetic intensity related features
ExtractArithmeticIntensityFeature(node, cur_compute_ops,
compute_ops_list, mem_bytes_list);
// Group 4: Allocation related features
ExtractOuterScopeFeature(node);
}
void VisitStmt_(const BufferRealizeNode* node) final {
StmtExprVisitor::VisitStmt_(node);
// Group 5: Outer scope related features
ExtractAllocationFeature(node);
}
```
I think the code is very clean and much better than the old autotvm now.
I don't like registration or adding an extra layer of callback. It is just
over design and make things more complicated.
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