93 lines
2.8 KiB
Python
93 lines
2.8 KiB
Python
# This code references https://huggingface.co/JosephusCheung/ASimilarityCalculatior/blob/main/qwerty.py
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# Fill in the path of the model to be queried and the root directory of the reference models, and this script will return the similarity between the model to be queried and all reference models.
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import sys, os
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import torch
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import torch.nn as nn
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import torch.nn.functional as F
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def cal_cross_attn(to_q, to_k, to_v, rand_input):
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hidden_dim, embed_dim = to_q.shape
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attn_to_q = nn.Linear(hidden_dim, embed_dim, bias=False)
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attn_to_k = nn.Linear(hidden_dim, embed_dim, bias=False)
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attn_to_v = nn.Linear(hidden_dim, embed_dim, bias=False)
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attn_to_q.load_state_dict({"weight": to_q})
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attn_to_k.load_state_dict({"weight": to_k})
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attn_to_v.load_state_dict({"weight": to_v})
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return torch.einsum(
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"ik, jk -> ik",
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F.softmax(
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torch.einsum("ij, kj -> ik", attn_to_q(rand_input), attn_to_k(rand_input)),
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dim=-1,
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),
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attn_to_v(rand_input),
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)
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def model_hash(filename):
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try:
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with open(filename, "rb") as file:
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import hashlib
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m = hashlib.sha256()
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file.seek(0x100000)
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m.update(file.read(0x10000))
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return m.hexdigest()[0:8]
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except FileNotFoundError:
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return "NOFILE"
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def eval(model, n, input):
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qk = f"enc_p.encoder.attn_layers.{n}.conv_q.weight"
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uk = f"enc_p.encoder.attn_layers.{n}.conv_k.weight"
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vk = f"enc_p.encoder.attn_layers.{n}.conv_v.weight"
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atoq, atok, atov = model[qk][:, :, 0], model[uk][:, :, 0], model[vk][:, :, 0]
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attn = cal_cross_attn(atoq, atok, atov, input)
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return attn
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def main(path, root):
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torch.manual_seed(114514)
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model_a = torch.load(path, map_location="cpu")["weight"]
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print("query:\t\t%s\t%s" % (path, model_hash(path)))
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map_attn_a = {}
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map_rand_input = {}
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for n in range(6):
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hidden_dim, embed_dim, _ = model_a[
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f"enc_p.encoder.attn_layers.{n}.conv_v.weight"
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].shape
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rand_input = torch.randn([embed_dim, hidden_dim])
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map_attn_a[n] = eval(model_a, n, rand_input)
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map_rand_input[n] = rand_input
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del model_a
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for name in sorted(list(os.listdir(root))):
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path = "%s/%s" % (root, name)
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model_b = torch.load(path, map_location="cpu")["weight"]
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sims = []
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for n in range(6):
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attn_a = map_attn_a[n]
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attn_b = eval(model_b, n, map_rand_input[n])
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sim = torch.mean(torch.cosine_similarity(attn_a, attn_b))
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sims.append(sim)
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print(
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"reference:\t%s\t%s\t%s"
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% (path, model_hash(path), f"{torch.mean(torch.stack(sims)) * 1e2:.2f}%")
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)
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if __name__ == "__main__":
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query_path = r"weights\mi v3.pth"
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reference_root = r"weights"
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main(query_path, reference_root)
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