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convert.py : Get rope scale from HuggingFace models #2772

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Merged
merged 4 commits into from
Aug 25, 2023
Merged

convert.py : Get rope scale from HuggingFace models #2772

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8d0d83b
Get rope scale from HF models
pnb Aug 24, 2023
8ac33ce
Save rope scale only for linear scaling
pnb Aug 24, 2023
aa896e7
Rewrite for clarity
pnb Aug 24, 2023
4950b2d
Merge branch 'master' into convert_rope_scale
pnb Aug 25, 2023
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10 changes: 10 additions & 0 deletions convert.py
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Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,7 @@ class Params:
f_norm_eps: float

f_rope_freq_base: Optional[float] = None
f_rope_scale: Optional[float] = None

ftype: Optional[GGMLFileType] = None

Expand Down Expand Up @@ -169,6 +170,11 @@ def loadHFTransformerJson(model: 'LazyModel', config_path: 'Path') -> 'Params':
f_norm_eps = config["rms_norm_eps"]
f_rope_freq_base = config["rope_theta"] if "rope_theta" in config else None

if "rope_scaling" in config and config["rope_scaling"].get("type") == "linear":
f_rope_scale = config["rope_scaling"].get("factor")
else:
f_rope_scale = None

n_mult = Params.find_n_mult(n_ff, n_embd)

if "max_sequence_length" in config:
Expand All @@ -190,6 +196,7 @@ def loadHFTransformerJson(model: 'LazyModel', config_path: 'Path') -> 'Params':
n_head_kv = n_head_kv,
f_norm_eps = f_norm_eps,
f_rope_freq_base = f_rope_freq_base,
f_rope_scale = f_rope_scale,
)

# LLaMA v2 70B params.json
Expand Down Expand Up @@ -773,6 +780,9 @@ def add_meta_arch(self, params: Params) -> None:
if params.f_rope_freq_base:
self.gguf.add_rope_freq_base(params.f_rope_freq_base)

if params.f_rope_scale:
self.gguf.add_rope_scale_linear(params.f_rope_scale)

if params.ftype:
self.gguf.add_file_type(params.ftype)

Expand Down