mirror of https://github.com/hpcaitech/ColossalAI
67 lines
2.6 KiB
Python
67 lines
2.6 KiB
Python
from functools import partial
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import torch
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from torch.nn import LayerNorm
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from colossalai.shardformer.policies.bloom import BloomForCausalLMPolicy
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from ..modeling.bloom import BloomInferenceForwards
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try:
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from colossalai.kernel.triton.fused_layernorm import layer_norm
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HAS_TRITON_NORM = True
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except:
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print("you should install triton from https://github.com/openai/triton")
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HAS_TRITON_NORM = False
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def get_triton_layernorm_forward():
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if HAS_TRITON_NORM:
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def _triton_layernorm_forward(self: LayerNorm, hidden_states: torch.Tensor):
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return layer_norm(hidden_states, self.weight.data, self.bias, self.eps)
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return _triton_layernorm_forward
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else:
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return None
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class BloomModelInferPolicy(BloomForCausalLMPolicy):
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def __init__(self) -> None:
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super().__init__()
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def module_policy(self):
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from transformers.models.bloom.modeling_bloom import BloomAttention, BloomBlock, BloomForCausalLM, BloomModel
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policy = super().module_policy()
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# NOTE set inference mode to shard config
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self.shard_config._infer()
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method_replacement = {
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'forward': BloomInferenceForwards.bloom_for_causal_lm_forward,
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'prepare_inputs_for_generation': BloomInferenceForwards.bloom_for_causal_lm_prepare_inputs_for_generation
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}
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self.append_or_create_method_replacement(description=method_replacement,
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policy=policy,
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target_key=BloomForCausalLM)
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method_replacement = {'forward': BloomInferenceForwards.bloom_model_forward}
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self.append_or_create_method_replacement(description=method_replacement, policy=policy, target_key=BloomModel)
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method_replacement = {'forward': BloomInferenceForwards.bloom_block_forward}
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self.append_or_create_method_replacement(description=method_replacement, policy=policy, target_key=BloomBlock)
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method_replacement = {'forward': BloomInferenceForwards.bloom_attention_forward}
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self.append_or_create_method_replacement(description=method_replacement,
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policy=policy,
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target_key=BloomAttention)
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if HAS_TRITON_NORM:
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infer_method = get_triton_layernorm_forward()
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method_replacement = {'forward': partial(infer_method)}
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self.append_or_create_method_replacement(description=method_replacement,
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policy=policy,
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target_key=LayerNorm)
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return policy
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