Minimal working eval #46
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This was referenced Feb 6, 2025
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This was referenced Feb 14, 2025
This commit does/fixes the following: 1. Adds unit tests for byte and patch packing to ensure it works correctly 2. Fixes a bug where for batches that end up with <max_length number of bytes (e.g., short patches), the mask was including elements that had value pad_id. This fixes the mask by setting it to be !=pad_id, if its not specified. 3. Correctly handles the last batch, where previously it would crash. This didn't affect training since we had enough data and/or looped iterators, but for evaluation perplexity, it comes up if we validation on an entire file. 4. Correctly forward the mask if it exists for byte packing Test Plan: ``` pytest bytelatent/ ``` Testing these changes more thoroughly in a stacked PR that fixes evals
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