junrushao1994 commented on a change in pull request #5:
URL: https://github.com/apache/tvm-rfcs/pull/5#discussion_r676866041
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File path: rfcs/0001-meta-schedule-autotensorir.md
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@@ -147,17 +203,20 @@ sch.reorder(
### 3.4. AutoScheduler-style Design Space Generation
-AutoScheduler (Ansor) generates schedule templates by applying their
SearchRules to each stage.
-SearchRule analyzes TE and eagerly trigger schedule primitives accordingly in
its internally
-maintained mini IR.
+To generate design space, AutoScheduler (Ansor) applies a set of rules to each
TE stage.
+The rules analyze the TE operations and apply an internal DSL to manipulating
its internal IR,
+which is in the end mapped to TE schedule primitives. This process is called
*sketch generation*.
-As introduced in Section 3.2, composite schedule rules are equivalent to
AutoScheduler's SearchRule
-in TensorIR scheduling. To further generate a design space for scheduling,
sampling instructions are
-used in composite schedule rules. Similarly, the sketch generation phase in
AutoScheduler is
-equivalent to applying composite schedule rules to each block in TensorIR.
+Composite schedule rules work in a similar way scheduling TensorIR, as
introduced in Section 3.2.
+It analyzes the TensorIR and apply schedule primitives directly to TensorIR
accordingly.
+When applying such rules to each TensorIR block in certain order (e.g.
Post-DFS Order),
+it generates a sequence of schedule primitives.
+If the sampling instructions are present in this sequence,
+the support of the probability space form a design space of possible
schedulings.
Review comment:
Further exploring the space is not part of the sketch generation phase
(1st phase in AutoScheduler), instead it corresponds to the random annotation
phase (2nd phase in AutoScheduler). I rephrased it a bit so that it is more
clarified.
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