53 lines
1.6 KiB
Python
Vendored
53 lines
1.6 KiB
Python
Vendored
from typing import Any, List, Union
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try:
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import web_rwkv_py as wrp
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except ModuleNotFoundError:
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try:
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from . import web_rwkv_py as wrp
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except ImportError:
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raise ModuleNotFoundError(
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"web_rwkv_py not found, install it from https://github.com/cryscan/web-rwkv-py"
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)
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class RWKV:
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def __init__(self, model_path: str, strategy: str = None):
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self.info = wrp.peek_info(model_path)
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self.w = {} # fake weight
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self.w["emb.weight"] = [0] * self.info.num_vocab
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self.version = str(self.info.version).lower()
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self.wrp = getattr(wrp, self.version)
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layer = (
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int(s.lstrip("layer"))
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for s in strategy.split()
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for s in s.split(",")
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if s.startswith("layer")
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)
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chunk_size = (
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int(s.lstrip("chunk"))
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for s in strategy.split()
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for s in s.split(",")
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if s.startswith("chunk")
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)
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args = {
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"file": model_path,
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"turbo": True,
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"quant": next(layer, 31) if "i8" in strategy else 0,
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"quant_nf4": next(layer, 26) if "i4" in strategy else 0,
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"token_chunk_size": next(chunk_size, 32),
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"lora": None,
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}
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self.model = self.wrp.Model(**args)
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def forward(self, tokens: List[int], state: Union[Any, None] = None):
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if type(state).__name__ == "BackedState": # memory state
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gpu_state = self.wrp.ModelState(self.model, 1)
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gpu_state.load(state)
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else:
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gpu_state = state
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return self.wrp.run_one(self.model, tokens, gpu_state)
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