{"id":614,"date":"2026-07-12T18:41:28","date_gmt":"2026-07-12T10:41:28","guid":{"rendered":"https:\/\/cococat.top\/?p=614"},"modified":"2026-07-12T18:41:28","modified_gmt":"2026-07-12T10:41:28","slug":"llm-%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/cococat.top\/index.php\/2026\/07\/12\/llm-%e7%ac%94%e8%ae%b0\/","title":{"rendered":"LLM \u7b14\u8bb0"},"content":{"rendered":"<h1>1. \u57fa\u7840\u7ed3\u6784<\/h1>\n<pre><code>\u539f\u59cb\u6587\u672c\n  \u2193 tokenizer\ntoken \u7f16\u53f7\n  \u2193 embedding\n\u521d\u59cb\u5411\u91cf X\u2080\n  \u2193 \u7b2c 1 \u4e2a Transformer \u5c42\n\u4e0a\u4e0b\u6587\u76f8\u5173\u8868\u793a X\u2081\n  \u2193 \u7b2c 2 \u4e2a Transformer \u5c42\n\u66f4\u6df1\u7684\u8868\u793a X\u2082\n  \u2193 \u2026\u2026\n\u6700\u7ec8\u8868\u793a\n  \u2193 \u8f93\u51fa\u5c42\n\u4e0b\u4e00\u4e2a token \u7684\u6982\u7387<\/code><\/pre>\n<h1>2. QKV\uff1aTransformer \u6ce8\u610f\u529b\u673a\u5236\u7684\u6700\u6838\u5fc3\u5b9e\u73b0\u5f62\u5f0f<\/h1>\n<h2>2.1 \u662f\u4ec0\u4e48<\/h2>\n<p>\u6bcf\u4e00\u5c42\u90fd\u6709\u4e09\u4e2a\u77e9\u9635\uff0c\u5c06 token \u6620\u5c04\u4e3a QKV \u4e09\u4e2a\u5411\u91cf\uff1a<\/p>\n<ul>\n<li>Q: \u672c token \u9700\u8981\u627e\u4ec0\u4e48\u4fe1\u606f<\/li>\n<li>K: \u672c token \u7684\u7279\u5f81\uff08\u53ef\u4ee5\u56e0\u4e3a\u4ec0\u4e48\u800c\u88ab\u627e\u5230\uff09<\/li>\n<li>V: \u5982\u679c\u5173\u6ce8\u672c token \uff0c\u5219\u5e94\u8be5\u5e26\u8d70\u4ec0\u4e48\u4fe1\u606f<\/li>\n<\/ul>\n<p>\u6a21\u578b\u7528 Query \u4e0e\u6240\u6709\u524d\u7eed token \u7684 Key \u505a\u70b9\u79ef\uff0c\uff08\u7ecf softmax \uff09\u7b97\u51fa\u4e00\u4e2a\u6743\u91cd\uff0c\u8fd9\u4e2a\u6743\u91cd\u4ee3\u8868\u4fe1\u606f\u7684\u5173\u8054\u7a0b\u5ea6\uff1b\u6700\u7ec8\u628a\u76f8\u5e94 Value \u505a\u52a0\u6743\u3002<\/p>\n<p><a href=\"https:\/\/postimg.cc\/dhdQv5V4\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/i.postimg.cc\/kgY2QZ33\/image.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/i.postimg.cc\/kgY2QZ33\/image.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image.png\" \/><\/div><\/a><\/p>\n<p>\u539f\u672c\u6bcf\u4e2a token \u90fd\u53ea\u5305\u542b\u4ed6\u81ea\u5df1\u7684\u4fe1\u606f\uff0c\u800c\u7ecf\u8fc7\u4e00\u5c42\u6a21\u578b\u7684\u5904\u7406\uff0c\u6bcf\u4e2a token \u90fd\u643a\u5e26\u4e0a\u4e86\u4e0e\u4e4b\u76f8\u5173\u8054\u7684\u989d\u5916\u4fe1\u606f\u3002<\/p>\n<p>\u591a\u5c42\u3001\u591a\u5934\u6ce8\u610f\u529b\u53cd\u590d\u8fdb\u884c\uff0c\u6a21\u578b\u4fbf\u80fd\u9010\u6e10\u5f62\u6210\u4ece\u8bed\u6cd5\u5173\u7cfb\u5230\u7bc7\u7ae0\u4e3b\u9898\u3001\u4ee3\u7801\u4f9d\u8d56\u3001\u4e8b\u5b9e\u5173\u8054\u7b49\u4e0d\u540c\u5c42\u6b21\u7684\u8868\u793a\u3002<\/p>\n<blockquote>\n<p>TODO: \u591a\u5c42\u3001\u591a\u5934\u6ce8\u610f\u529b<\/p>\n<\/blockquote>\n<h2>2.2 KV Cache<\/h2>\n<p>\u751f\u6210\u4e0b\u4e00\u4e2a token \u65f6\uff0c\u6211\u4eec\u9700\u8981\u6309\u7167 2.1 \u8282\u7684\u63cf\u8ff0\uff0c\u8ba1\u7b97\u672c token \u7684 Q\uff0c\u5e76\u4e14\u4e0e\u524d\u5e8f token \u7684 K\u3001V \u505a\u8fd0\u7b97\u3002<\/p>\n<p>\u800c\u524d\u5e8f token \u7684 K\u3001V \u5728\u524d\u51e0\u8f6e\u751f\u6210\u8fc7\u7a0b\u4e2d\u5c31\u5df2\u7ecf\u8ba1\u7b97\u8fc7\u4e86\uff0c\u4e14\u4e0d\u4f1a\u968f\u7740\u751f\u6210\u540e\u7ee7 token \u800c\u6539\u53d8\u3002\u56e0\u6b64\u663e\u7136\u8fd9\u4e2a\u6b65\u9aa4\u53ef\u901a\u8fc7\u7f13\u5b58\u63d0\u901f\u4e0e\u964d\u672c\u3002\u53e6\uff0c\u4e5f\u662f\u663e\u7136\u5730\uff0c\u7531\u4e8e Q \u53ea\u7528\u4e8e\u4e0b\u4e00\u8f6e token \u7684\u751f\u6210\uff0c\u4e00\u822c\u6ca1\u6709\u5fc5\u8981\u8fdb\u884c\u7f13\u5b58\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. \u57fa\u7840\u7ed3\u6784 \u539f\u59cb\u6587\u672c \u2193 tokenizer token \u7f16\u53f7 \u2193 embedding \u521d\u59cb\u5411\u91cf X\u2080 \u2193 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[44],"class_list":["post-614","post","type-post","status-publish","format-standard","hentry","category-ai","tag-ai"],"_links":{"self":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts\/614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/comments?post=614"}],"version-history":[{"count":1,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts\/614\/revisions"}],"predecessor-version":[{"id":615,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts\/614\/revisions\/615"}],"wp:attachment":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/media?parent=614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/categories?post=614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/tags?post=614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}