Adding support for tracking optimizers states in Model Delta Tracker. #3143
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Summary: ### Overview This diff adds support for tracking optimizer states in the Model Delta Tracker system. It introduces a new tracking mode called `MOMENTUM_LAST` that enables tracking of momentum values from optimizers to support approximate top-k delta-row selection. ### Key Changes #### 1. Optimizer State Tracking Support * To support tracking of optimizer states I have added `optim_state_tracker_fn` attribute to `GroupedEmbeddingsLookup` and `GroupedPooledEmbeddingsLookup` classes responsible for traversing over the BatchedFused modules. * Implemented `register_optim_state_tracker_fn()` method in both classes to register the trackable callable * Tracking calls are invoked after each lookup operation. #### 2. Model Delta Tracker Changes * Added `record_momentum()` method to track momentum values from optimizer states and its support in record_lookup function. * Added validation and optim tracker function logic to support the new `MOMENTUM_LAST` mode #### 3. New Tracking Mode * Added `TrackingMode.MOMENTUM_LAST` to [`**types.py**`](command:code-compose.open?%5B%22%2Ffbcode%2Ftorchrec%2Fdistributed%2Fmodel_tracker%2Ftypes.py%22%2Cnull%5D "/fbcode/torchrec/distributed/model_tracker/types.py") * Maps to `EmbdUpdateMode.LAST` to capture the most recent momentum values Differential Revision: D76868111
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Summary:
Overview
This diff adds support for tracking optimizer states in the Model Delta Tracker system. It introduces a new tracking mode called
MOMENTUM_LASTthat enables tracking of momentum values from optimizers to support approximate top-k delta-row selection.Key Changes
1. Optimizer State Tracking Support
optim_state_tracker_fnattribute toGroupedEmbeddingsLookupandGroupedPooledEmbeddingsLookupclasses responsible for traversing over the BatchedFused modules.register_optim_state_tracker_fn()method in both classes to register the trackable callable2. Model Delta Tracker Changes
record_momentum()method to track momentum values from optimizer states and its support in record_lookup function.MOMENTUM_LASTmode3. New Tracking Mode
TrackingMode.MOMENTUM_LASTto**types.py**EmbdUpdateMode.LASTto capture the most recent momentum valuesDifferential Revision: D76868111