154 lines
4.7 KiB
Python
154 lines
4.7 KiB
Python
import torch
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import sys
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import math
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from modelscope import snapshot_download
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from transformers import AutoTokenizer
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from transformers import AutoConfig
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from modeling_qwen import QWenLMHeadModel
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from modeling_qwen import QwenRunner
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import torch.nn.functional as F
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from qwen_generation_utils import (
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make_context,
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decode_tokens,
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)
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sys.path.append("..")
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from tools import show
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seed = 4321
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torch.manual_seed(seed)
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torch.cuda.manual_seed_all(seed)
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model_dir = snapshot_download("qwen/Qwen-1_8B-Chat")
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# model_dir = "/home/colin/.cache/modelscope/hub/qwen/Qwen-1_8B-Chat"
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config, kwargs = AutoConfig.from_pretrained(
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"./",
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return_unused_kwargs=True,
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trust_remote_code=True,
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code_revision=None,
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_commit_hash=None,
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)
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model = QWenLMHeadModel(config)
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print(model)
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tokenizer = AutoTokenizer.from_pretrained(model_dir, trust_remote_code=True)
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model = model.from_pretrained(model_dir)
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model = model.eval()
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def Dump_tokens_list(model):
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tokens = []
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for token in range(config.eos_token_id):
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decoded, response, end_reason = decode_tokens(
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[token],
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tokenizer,
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raw_text_len=0,
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context_length=0,
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errors="replace",
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)
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tokens.append(str(token).zfill(7) + ": " + repr(decoded))
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show.DumpListToFile(tokens, "./temp/qwen_token_list.txt")
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# Dump_tokens_list(model)
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def Dump_lm_head_weight(model):
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weight = model.lm_head.weight.cpu() # [151936,2048,]
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weight = weight.reshape(64, -1, 2048)
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for i in range(64):
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sub = weight[i].reshape(-1, 64, 32)
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show.DumpTensorToImage(sub, "./temp/lm_head_" + str(i) + "_2374_2048.png")
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# Dump_lm_head_weight(model)
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def DumpQK(query, key, causal_mask, index):
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scale_factor = 1 / math.sqrt(query.size(-1))
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attn_weight = query @ key.transpose(-2, -1) * scale_factor
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attn_mask = torch.ones(causal_mask.shape, dtype=query.dtype, device=query.device)
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attn_mask.masked_fill_(causal_mask.logical_not(), float(0))
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attn_weight = attn_weight * attn_mask
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attn_weight = torch.softmax(attn_weight, dim=-1)
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size = query.shape[2]
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qk = attn_weight[0]
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# prePath = "./temp/" + "q@k_seq_" + str(size) + "_layer_" + str(index) + ".png"
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# show.DumpTensorToImage(qk, prePath, GridValue=255)
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prePath = "./temp/" + "q@k_sum_seq_" + str(size) + "_layer_" + str(index) + ".png"
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show.DumpTensorToImage(qk.sum(0), prePath, GridValue=255)
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class ResearchRunner(QwenRunner):
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def __init__(self, model):
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super().__init__(model)
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def attention(self, attention, query, key, value, causal_mask):
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query = query.permute(0, 2, 1, 3)
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key = key.permute(0, 2, 1, 3)
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value = value.permute(0, 2, 1, 3)
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DumpQK(query, key, causal_mask, attention.index)
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attn_output = F.scaled_dot_product_attention(query, key, value, attn_mask=causal_mask).transpose(1, 2)
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context_layer = attention._merge_heads(attn_output, attention.num_heads, attention.head_dim)
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attn_output = attention.c_proj(context_layer)
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return attn_output
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def prepareInput(self, tokenizer, query, query_assistant, history, system):
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start_to = [151644]
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n_to = [198]
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end_to = [151645]
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system_str = "system\nYou are a helpful assistant."
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user_str = "user\n" + query
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aassistant_str = "assistant\n" + query_assistant
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system_token = start_to + tokenizer.encode(system_str, allowed_special=set()) + end_to + n_to
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user_token = start_to + tokenizer.encode(user_str, allowed_special=set()) + end_to + n_to
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aassistant_token = start_to + tokenizer.encode(aassistant_str, allowed_special=set())
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tokens = system_token + user_token + aassistant_token
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tokens = user_token + aassistant_token
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tokens = start_to + tokenizer.encode("user\n你好\nassistant\n", allowed_special=set())
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return "", tokens
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runner = ResearchRunner(model)
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# 第一轮对话
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# output_ids, history, decoded = runner.Chat(tokenizer, "东南亚国家日本的首都是什么市", "日本的首都是")
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# print(decoded)
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output_ids, history, decoded = runner.Chat(tokenizer, "你好!!", "")
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print(decoded)
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tokens = []
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for i, token in enumerate(output_ids):
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de = tokenizer.decode([token])
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de = str(i + 1).zfill(3) + " : " + repr(de)
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tokens.append(de)
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# <|im_start|>system
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# You are a helpful assistant.<|im_end|>
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# <|im_start|>user
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# 东南亚国家日本的首都是什么市<|im_end|>
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# <|im_start|>assistant
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# 日本的首都东京。<|im_end|>
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# <|endoftext|>
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show.DumpListToFile(tokens, "./temp/token_decode_list.txt")
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# if decoded.split("\n")[-2] != """日本的首都东京。<|im_end|>""":
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# raise ()
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# normal (x - mean) / (std + eps) => sum(y)==0
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# softmax exp(x) / sum(exp(x)) => 0 < y < 1 sum(y)==1
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