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Merge pull request #149 from aryamanarora/main
[P1] Add Gemma + minor fixes
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""" | ||
Each modeling file in this library is a mapping between | ||
abstract naming of intervention anchor points and actual | ||
model module defined in the huggingface library. | ||
We also want to let the intervention library know how to | ||
config the dimensions of intervention based on model config | ||
defined in the huggingface library. | ||
""" | ||
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import torch | ||
from ..constants import * | ||
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gemma_type_to_module_mapping = { | ||
"block_input": ("layers[%s]", CONST_INPUT_HOOK), | ||
"block_output": ("layers[%s]", CONST_OUTPUT_HOOK), | ||
"mlp_activation": ("layers[%s].mlp.act_fn", CONST_OUTPUT_HOOK), | ||
"mlp_output": ("layers[%s].mlp", CONST_OUTPUT_HOOK), | ||
"mlp_input": ("layers[%s].mlp", CONST_INPUT_HOOK), | ||
"attention_value_output": ("layers[%s].self_attn.o_proj", CONST_INPUT_HOOK), | ||
"head_attention_value_output": ("layers[%s].self_attn.o_proj", CONST_INPUT_HOOK), | ||
"attention_output": ("layers[%s].self_attn", CONST_OUTPUT_HOOK), | ||
"attention_input": ("layers[%s].self_attn", CONST_INPUT_HOOK), | ||
"query_output": ("layers[%s].self_attn.q_proj", CONST_OUTPUT_HOOK), | ||
"key_output": ("layers[%s].self_attn.k_proj", CONST_OUTPUT_HOOK), | ||
"value_output": ("layers[%s].self_attn.v_proj", CONST_OUTPUT_HOOK), | ||
"head_query_output": ("layers[%s].self_attn.q_proj", CONST_OUTPUT_HOOK), | ||
"head_key_output": ("layers[%s].self_attn.k_proj", CONST_OUTPUT_HOOK), | ||
"head_value_output": ("layers[%s].self_attn.v_proj", CONST_OUTPUT_HOOK), | ||
} | ||
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gemma_type_to_dimension_mapping = { | ||
"block_input": ("hidden_size",), | ||
"block_output": ("hidden_size",), | ||
"mlp_activation": ("intermediate_size",), | ||
"mlp_output": ("hidden_size",), | ||
"mlp_input": ("hidden_size",), | ||
"attention_value_output": ("hidden_size",), | ||
"head_attention_value_output": ("hidden_size/num_attention_heads",), | ||
"attention_output": ("hidden_size",), | ||
"attention_input": ("hidden_size",), | ||
"query_output": ("hidden_size",), | ||
"key_output": ("hidden_size",), | ||
"value_output": ("hidden_size",), | ||
"head_query_output": ("hidden_size/num_attention_heads",), | ||
"head_key_output": ("hidden_size/num_attention_heads",), | ||
"head_value_output": ("hidden_size/num_attention_heads",), | ||
} | ||
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"""gemma model with LM head""" | ||
gemma_lm_type_to_module_mapping = {} | ||
for k, v in gemma_type_to_module_mapping.items(): | ||
gemma_lm_type_to_module_mapping[k] = (f"model.{v[0]}", v[1]) | ||
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gemma_lm_type_to_dimension_mapping = gemma_type_to_dimension_mapping | ||
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"""gemma model with classifier head""" | ||
gemma_classifier_type_to_module_mapping = {} | ||
for k, v in gemma_type_to_module_mapping.items(): | ||
gemma_classifier_type_to_module_mapping[k] = (f"model.{v[0]}", v[1]) | ||
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gemma_classifier_type_to_dimension_mapping = gemma_type_to_dimension_mapping | ||
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def create_gemma( | ||
name="google/gemma-2b-it", cache_dir=None, dtype=torch.bfloat16 | ||
): | ||
"""Creates a Gemma Causal LM model, config, and tokenizer from the given name and revision""" | ||
from transformers import GemmaForCausalLM, GemmaTokenizer, GemmaConfig | ||
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config = GemmaConfig.from_pretrained(name, cache_dir=cache_dir) | ||
tokenizer = GemmaTokenizer.from_pretrained(name, cache_dir=cache_dir) | ||
gemma = GemmaForCausalLM.from_pretrained( | ||
name, | ||
config=config, | ||
cache_dir=cache_dir, | ||
torch_dtype=dtype, # save memory | ||
) | ||
print("loaded model") | ||
return config, tokenizer, gemma |
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