fix conversion of hf -> neox for pythia in model parallel #1220
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dmahan93
changed the title
Quentin-Anthony
approved these changes
Jun 7, 2024
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Fixes the very high loss at start of training a split pythia/neox model
Matches it so that the summed biases https://github.com/EleutherAI/gpt-neox/blob/main/tools/ckpts/convert_neox_to_hf.py#L520-L525 from the HF checkpoint are split appropriately in a tensor parallel case.
(For reference, magenta is pre-fix, blue is post-fix, grey is a 1.4b run without model parallelism for reference)
