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Faster eval #298

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Faster eval #298

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jmercat
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@jmercat jmercat commented Jul 31, 2024

We might not want to merge this because it is hacky and there might be a usage that I don't foresee that could be impacted.

Problem:
Somewhere in llm-foundry or composer, the batches are appended with many stop tokens which makes the eval very slow.

Solution:
In OpenLMforCausalLM tests for 0s at the end of the input_ids batch and remove them. Add back fake logits at the end....

Consideration:
This hack could be implemented in SimpleComposerOpenLMCausalLM instead and would have less risk to have unforeseen impacts.
There shouldn't really be a need for this but I could not understand what was happening in Composer or llm-foundry or find where/why the inputs are appended with 0s.

@jmercat jmercat mentioned this pull request Jul 31, 2024
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