adstraw opened a new pull request, #13037:
URL: https://github.com/apache/tvm/pull/13037
Instead of a single `async_commit_queue_scope` encompassing several
`async_scope` attributes e.g. as follows:
```
with T.attr(0, "async_commit_queue_scope", 0):
with T.attr(0, "async_scope", 1):
for ax0 in T.serial(64):
A_global_vtcm_1[ax0] = A[ax0]
T.attr(0, "async_scope", 1)
for ax0 in T.serial(64):
B_global_vtcm_1[ax0] = B[ax0]
```
Force each `async_scope` to be in its own `async_commit_queue_scope`
attribute e.g. as follows:
```
with T.attr(0, "async_commit_queue_scope", 0):
T.attr(0, "async_scope", 1)
for ax0 in T.serial(64):
A_global_vtcm_1[ax0] = A[ax0]
with T.attr(0, "async_commit_queue_scope", 0):
T.attr(0, "async_scope", 1)
for ax0 in T.serial(64):
B_global_vtcm_1[ax0] = B[ax0]
```
And adjust "in flight" wait counts accordingly. In the former case (single
`async_commit_queue_scope`) the "in flight" wait count is `1` and in the latter
case (multiple `async_commit_queue_scope`) the "in flight" wait count is `n`
where `n` is the number of `async_commit_queue_scope` attributes --- `2` in the
example.
This enables multiple input async DMA using the same queue / stage on
Hexagon where before it was blocked due to the fact that "in flight" counts are
managed for each individual DMA with no way to determine if a group of DMAs has
completed.
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