support serialization of compound module #2082
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Summary:
# details
* serialization schedule
```
comp.ebc does NOT require further serialization of its children
comp.ebc.embedding_bags is skipped for further serialization
comp.ebc.embedding_bags.t1 is skipped for further serialization
comp.ebc.embedding_bags.t2 is skipped for further serialization
comp.ebc.embedding_bags.t3 is skipped for further serialization
comp.comp is resumed for serialization
comp.comp Requires further serialization of its children
comp.comp.ebc does NOT require further serialization of its children
comp.comp.ebc.embedding_bags is skipped for further serialization
comp.comp.ebc.embedding_bags.t1 is skipped for further serialization
comp.comp.ebc.embedding_bags.t2 is skipped for further serialization
comp.comp.ebc.embedding_bags.t3 is skipped for further serialization
comp.comp.comp is resumed for serialization
comp.comp.comp Requires further serialization of its children
comp.comp.comp.ebc does NOT require further serialization of its children
comp.comp.comp.ebc.embedding_bags is skipped for further serialization
comp.comp.comp.ebc.embedding_bags.t1 is skipped for further serialization
comp.comp.comp.ebc.embedding_bags.t2 is skipped for further serialization
comp.comp.comp.ebc.embedding_bags.t3 is skipped for further serialization
```
* `parent_fqn`'s children
```
comp.comp.comp {'ebc': EmbeddingBagCollection(
(embedding_bags): ModuleDict(
(t1): EmbeddingBag(10, 4, mode='sum')
(t2): EmbeddingBag(10, 4, mode='sum')
(t3): EmbeddingBag(10, 4, mode='sum')
)
)} None None
```
```
comp.comp {'ebc': EmbeddingBagCollection(
(embedding_bags): ModuleDict(
(t1): EmbeddingBag(10, 4, mode='sum')
(t2): EmbeddingBag(10, 4, mode='sum')
(t3): EmbeddingBag(10, 4, mode='sum')
)
), 'comp': CompoundModule(
(ebc): EmbeddingBagCollection(
(embedding_bags): ModuleDict(
(t1): EmbeddingBag(10, 4, mode='sum')
(t2): EmbeddingBag(10, 4, mode='sum')
(t3): EmbeddingBag(10, 4, mode='sum')
)
)
)} None None
```
```
comp {'ebc': EmbeddingBagCollection(
(embedding_bags): ModuleDict(
(t1): EmbeddingBag(10, 4, mode='sum')
(t2): EmbeddingBag(10, 4, mode='sum')
(t3): EmbeddingBag(10, 4, mode='sum')
)
), 'comp': CompoundModule(
(ebc): EmbeddingBagCollection(
(embedding_bags): ModuleDict(
(t1): EmbeddingBag(10, 4, mode='sum')
(t2): EmbeddingBag(10, 4, mode='sum')
(t3): EmbeddingBag(10, 4, mode='sum')
)
)
(comp): CompoundModule(
(ebc): EmbeddingBagCollection(
(embedding_bags): ModuleDict(
(t1): EmbeddingBag(10, 4, mode='sum')
(t2): EmbeddingBag(10, 4, mode='sum')
(t3): EmbeddingBag(10, 4, mode='sum')
)
)
)
)} None None
```
Differential Revision: D58221182
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Summary: Pull Request resolved: pytorch#2082 # context * to support compound module serialization such as fpEBC and fpPEA, we modified the serializer interface a little * the basic idea is that: a. if a compound module A consists of child module B and C, such that module B and C have their own serializer available. b. for serialization of module A, we can just capture it relation from B and C, and used it when deserialization c. specifically, during the deserialization, A's children will be passed in as a dict of (child_fqn => child_module) # design doc [**TorchRec Composable Serializer Design**](https://docs.google.com/document/d/1WUtmzdcqZmwLd4Do8g1fQRjChnRw0ZimyUrCNhxa4nA/edit#heading=h.ezrtdguw0lwq) # note * in order to apply this approach, it requires that module A's construction **takes in it's children as objects** * **DO NOT** create A's children in the A's construction # details * serialization schedule ``` comp.ebc does NOT require further serialization of its children comp.ebc.embedding_bags is skipped for further serialization comp.ebc.embedding_bags.t1 is skipped for further serialization comp.ebc.embedding_bags.t2 is skipped for further serialization comp.ebc.embedding_bags.t3 is skipped for further serialization comp.comp is resumed for serialization comp.comp Requires further serialization of its children comp.comp.ebc does NOT require further serialization of its children comp.comp.ebc.embedding_bags is skipped for further serialization comp.comp.ebc.embedding_bags.t1 is skipped for further serialization comp.comp.ebc.embedding_bags.t2 is skipped for further serialization comp.comp.ebc.embedding_bags.t3 is skipped for further serialization comp.comp.comp is resumed for serialization comp.comp.comp Requires further serialization of its children comp.comp.comp.ebc does NOT require further serialization of its children comp.comp.comp.ebc.embedding_bags is skipped for further serialization comp.comp.comp.ebc.embedding_bags.t1 is skipped for further serialization comp.comp.comp.ebc.embedding_bags.t2 is skipped for further serialization comp.comp.comp.ebc.embedding_bags.t3 is skipped for further serialization ``` * `parent_fqn`'s children ``` comp.comp.comp {'ebc': EmbeddingBagCollection( (embedding_bags): ModuleDict( (t1): EmbeddingBag(10, 4, mode='sum') (t2): EmbeddingBag(10, 4, mode='sum') (t3): EmbeddingBag(10, 4, mode='sum') ) )} None None ``` ``` comp.comp {'ebc': EmbeddingBagCollection( (embedding_bags): ModuleDict( (t1): EmbeddingBag(10, 4, mode='sum') (t2): EmbeddingBag(10, 4, mode='sum') (t3): EmbeddingBag(10, 4, mode='sum') ) ), 'comp': CompoundModule( (ebc): EmbeddingBagCollection( (embedding_bags): ModuleDict( (t1): EmbeddingBag(10, 4, mode='sum') (t2): EmbeddingBag(10, 4, mode='sum') (t3): EmbeddingBag(10, 4, mode='sum') ) ) )} None None ``` ``` comp {'ebc': EmbeddingBagCollection( (embedding_bags): ModuleDict( (t1): EmbeddingBag(10, 4, mode='sum') (t2): EmbeddingBag(10, 4, mode='sum') (t3): EmbeddingBag(10, 4, mode='sum') ) ), 'comp': CompoundModule( (ebc): EmbeddingBagCollection( (embedding_bags): ModuleDict( (t1): EmbeddingBag(10, 4, mode='sum') (t2): EmbeddingBag(10, 4, mode='sum') (t3): EmbeddingBag(10, 4, mode='sum') ) ) (comp): CompoundModule( (ebc): EmbeddingBagCollection( (embedding_bags): ModuleDict( (t1): EmbeddingBag(10, 4, mode='sum') (t2): EmbeddingBag(10, 4, mode='sum') (t3): EmbeddingBag(10, 4, mode='sum') ) ) ) )} None None ``` Differential Revision: D58221182
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Summary:
details
parent_fqn's childrenDifferential Revision: D58221182