{"id":36015,"date":"2025-05-07T09:11:07","date_gmt":"2025-05-07T01:11:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/36015.html"},"modified":"2025-05-07T09:11:07","modified_gmt":"2025-05-07T01:11:07","slug":"llama-2%e5%a4%a7%e6%a8%a1%e5%9e%8b%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/36015.html","title":{"rendered":"llama-2\u5927\u6a21\u578b\u7ed3\u6784"},"content":{"rendered":"<h2>llama-2\u5927\u6a21\u578b\u7ed3\u6784<\/h2>\n<p>llama\u5927\u6a21\u578b\u662fMeta\u516c\u53f8\u5f00\u6e90\u7684\u5927\u8bed\u8a00\u6a21\u578b&#xff0c;\u76ee\u524d\u6700\u65b0\u7684\u4e3allama3.1\u53c2\u6570\u91cf\u8fbe\u5230\u4e86405B&#xff0c;\u975e\u5e38\u6050\u6016<\/p>\n<p>\u4ee57B\u6a21\u578b\u4e3a\u4f8b&#xff0c;\u68b3\u7406llama-2\u7684\u6a21\u578b\u7ed3\u6784&#xff0c;\u91cd\u70b9\u5173\u6ce8\u5176\u5bf9\u4f20\u7edfTransformer\u6a21\u578b\u7684\u7ed3\u6784\u4fee\u6539<\/p>\n<p>LlamaConfig <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token string\">&#034;_name_or_path&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;llama2\/llama-2-7b&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;architectures&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n    <span class=\"token string\">&#034;LlamaForCausalLM&#034;<\/span><br \/>\n  <span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;attention_bias&#034;<\/span><span class=\"token punctuation\">:<\/span> false<span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;bos_token_id&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;eos_token_id&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;hidden_act&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;silu&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;hidden_size&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;initializer_range&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">0.02<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;intermediate_size&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">11008<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;max_position_embeddings&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">2048<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;model_type&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;llama&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;num_attention_heads&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">32<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;num_hidden_layers&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">32<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;num_key_value_heads&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">32<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;pad_token_id&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;pretraining_tp&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;rms_norm_eps&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1e-05<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;rope_scaling&#034;<\/span><span class=\"token punctuation\">:<\/span> null<span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;rope_theta&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">10000.0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;tie_word_embeddings&#034;<\/span><span class=\"token punctuation\">:<\/span> false<span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;torch_dtype&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;bfloat16&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;transformers_version&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;4.31.0&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;use_cache&#034;<\/span><span class=\"token punctuation\">:<\/span> true<span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string\">&#034;vocab_size&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">32000<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4ece\u4e0a\u8ff0config\u6587\u4ef6\u53ef\u4ee5\u770b\u5230&#xff0c;<\/p>\n<ul>\n<li>llama2 \u91c7\u7528\u7684\u6fc0\u6d3b\u51fd\u6570\u662f silu<\/li>\n<li>\u8bcd\u8868\u5927\u5c0f\u4e3a 32000<\/li>\n<li>\u9884\u8bad\u7ec3\u53c2\u6570\u7684\u6570\u636e\u7c7b\u578b\u662f bfloat16<\/li>\n<\/ul>\n<p>Pytorch\u5b9a\u4e49\u597d\u6a21\u578b\u540e&#xff0c;print(model) \u7684\u8f93\u51fa&#xff1a;<\/p>\n<p>LlamaForCausalLM<span class=\"token punctuation\">(<\/span><br \/>\n  <span class=\"token punctuation\">(<\/span>model<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> LlamaModel<span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token punctuation\">(<\/span>embed_tokens<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Embedding<span class=\"token punctuation\">(<\/span><span class=\"token number\">32000<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> padding_idx<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">(<\/span>layers<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> ModuleList<span class=\"token punctuation\">(<\/span><br \/>\n      <span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">31<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">32<\/span> x LlamaDecoderLayer<span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token punctuation\">(<\/span>self_attn<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> LlamaAttention<span class=\"token punctuation\">(<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>q_proj<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>k_proj<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>v_proj<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>o_proj<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>rotary_emb<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> LlamaRotaryEmbedding<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">(<\/span>mlp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> LlamaMLP<span class=\"token punctuation\">(<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>gate_proj<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">11008<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>up_proj<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">11008<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>down_proj<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">11008<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">(<\/span>act_fn<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> SiLUActivation<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">(<\/span>input_layernorm<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> LlamaRMSNorm<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">(<\/span>post_attention_layernorm<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> LlamaRMSNorm<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n      <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">(<\/span>norm<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> LlamaRMSNorm<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n  <span class=\"token punctuation\">)<\/span><br \/>\n  <span class=\"token punctuation\">(<\/span>lm_head<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span> Linear<span class=\"token punctuation\">(<\/span>in_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4096<\/span><span class=\"token punctuation\">,<\/span> out_features<span class=\"token operator\">&#061;<\/span><span class=\"token number\">32000<\/span><span class=\"token punctuation\">,<\/span> bias<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u53ef\u4ee5\u770b\u5230 LLama-2 7b \u662f\u7531 32 \u4e2a LLamaDecoderLayer 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