{"id":57710,"date":"2025-03-06T20:57:24","date_gmt":"2025-03-06T12:57:24","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=57710"},"modified":"2025-03-06T20:57:24","modified_gmt":"2025-03-06T12:57:24","slug":"linux%e5%86%85%e5%ad%98%e7%ae%a1%e7%90%86%e7%9a%84%e7%81%b5%e9%ad%82%ef%bc%9ammu%e5%a6%82%e4%bd%95%e4%bc%98%e5%8c%96%e7%be%8e%e5%9b%bd%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/57710\/","title":{"rendered":"Linux\u5185\u5b58\u7ba1\u7406\u7684\u7075\u9b42\uff1aMMU\u5982\u4f55\u4f18\u5316\u7f8e\u56fd\u670d\u52a1\u5668\u6027\u80fd"},"content":{"rendered":"

\u6df1\u5ea6\u89e3\u6790MMU\u5185\u5b58\u7ba1\u7406\uff1a\u5982\u4f55\u4fdd\u969c\u7f8e\u56fd\u670d\u52a1\u5668\u9ad8\u6548\u7a33\u5b9a\u8fd0\u884c<\/strong><\/p>\n

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\u4e00\u3001\u5f15\u8a00\uff1a\u865a\u62df\u5185\u5b58\u4e0eMMU\u7684\u9b45\u529b<\/h3>\n

\u865a\u62df\u5185\u5b58\uff0c\u4f5c\u4e3a\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u6700\u4f1f\u5927\u7684\u53d1\u660e\u4e4b\u4e00\uff0c\u80fd\u591f\u4e3a\u6bcf\u4e2a\u8fdb\u7a0b\u63d0\u4f9b\u4e00\u81f4\u4e14\u72ec\u7acb\u7684\u5730\u5740\u7a7a\u95f4\uff0c\u4f7f\u5f97\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u4eff\u4f5b\u62e5\u6709\u81ea\u5df1\u7684\u79c1\u6709\u5185\u5b58\uff0c\u907f\u514d\u4e86\u4e0e\u5176\u4ed6\u8fdb\u7a0b\u4e4b\u95f4\u7684\u5e72\u6270\u3002\u865a\u62df\u5185\u5b58\u4e0d\u4ec5\u8ba9\u8ba1\u7b97\u673a\u7684\u5185\u5b58\u5229\u7528\u6548\u7387\u66f4\u9ad8\uff0c\u8fd8\u63d0\u5347\u4e86\u6574\u4f53\u7684\u7cfb\u7edf\u7a33\u5b9a\u6027\u3002<\/p>\n

\u5728\u8fd9\u5176\u4e2d\uff0cMMU\u53d1\u6325\u7740\u6838\u5fc3\u4f5c\u7528\u3002\u65e0\u8bba\u662f\u5728\u5355\u53f0\u8ba1\u7b97\u673a\u4e2d\uff0c\u8fd8\u662f\u5728\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u7b49\u5927\u89c4\u6a21\u670d\u52a1\u5668\u73af\u5883\u4e2d\uff0cMMU\u90fd\u5728\u5e2e\u52a9\u64cd\u4f5c\u7cfb\u7edf\u9ad8\u6548\u5730\u7ba1\u7406\u865a\u62df\u5185\u5b58\u4e0e\u7269\u7406\u5185\u5b58\u4e4b\u95f4\u7684\u6620\u5c04\uff0c\u786e\u4fdd\u5404\u4e2a\u7a0b\u5e8f\u80fd\u591f\u5728\u6709\u9650\u7684\u7269\u7406\u5185\u5b58\u4e2d\u201c\u548c\u5e73\u5171\u5904\u201d\u3002<\/p>\n

\u4e8c\u3001MMU\u7684\u57fa\u672c\u6982\u5ff5\u4e0e\u4f5c\u7528<\/h3>\n

2.1 \u4ec0\u4e48\u662f\u865a\u62df\u5185\u5b58\uff1f<\/h4>\n

\u865a\u62df\u5185\u5b58\u672c\u8d28\u4e0a\u662f\u8ba1\u7b97\u673a\u4e3a\u4e86\u89e3\u51b3\u7269\u7406\u5185\u5b58\u4e0d\u8db3\u7684\u95ee\u9898\u800c\u5f15\u5165\u7684\u6280\u672f\u3002\u5b83\u901a\u8fc7\u5c06\u5185\u5b58\u7a7a\u95f4\u5212\u5206\u4e3a\u56fa\u5b9a\u5927\u5c0f\u7684\u9875\uff08\u901a\u5e38\u4e3a4KB\uff09\u6765\u521b\u5efa\u4e00\u4e2a\u8fde\u7eed\u7684\u3001\u66f4\u5927\u7684\u5185\u5b58\u7a7a\u95f4\u7ed9\u8fdb\u7a0b\u4f7f\u7528\u3002\u5bf9\u4e8e\u8fdb\u7a0b\u6765\u8bf4\uff0c\u8fd9\u4e2a\u865a\u62df\u7a7a\u95f4\u662f\u8fde\u7eed\u7684\uff0c\u4f46\u5b9e\u9645\u6570\u636e\u53ef\u80fd\u5b58\u50a8\u5728\u7269\u7406\u5185\u5b58\u548c\u78c1\u76d8\u4e0a\u3002\u5f53\u5185\u5b58\u7a7a\u95f4\u4e0d\u8db3\u65f6\uff0cMMU\u901a\u8fc7\u9875\u9762\u7f6e\u6362\u5c06\u90e8\u5206\u5185\u5b58\u6570\u636e\u4ea4\u6362\u5230\u78c1\u76d8\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u8d85\u8d8a\u7269\u7406\u5185\u5b58\u9650\u5236\u7684\u8fd0\u7b97\u3002<\/p>\n

2.2 MMU\u7684\u804c\u8d23<\/h4>\n

MMU\u7684\u6838\u5fc3\u804c\u8d23\u662f\u865a\u62df\u5730\u5740\u5230\u7269\u7406\u5730\u5740\u7684\u8f6c\u6362<\/strong>\u3002\u6bcf\u4e2a\u8fdb\u7a0b\u5728\u8fd0\u884c\u65f6\u90fd\u4f1a\u751f\u6210\u865a\u62df\u5730\u5740\uff0cMMU\u8d1f\u8d23\u5c06\u8fd9\u4e9b\u865a\u62df\u5730\u5740\u6620\u5c04\u5230\u5b9e\u9645\u7684\u7269\u7406\u5185\u5b58\u4f4d\u7f6e\u3002\u8fd9\u5c31\u50cf\u662f\u628a\u4e0d\u540c\u5730\u533a\u7684\u90ae\u9012\u5458\u5206\u522b\u8d1f\u8d23\u4e0d\u540c\u533a\u57df\u7684\u90ae\u4ef6\u6295\u9012\uff0c\u786e\u4fdd\u6bcf\u4e2a\u7a0b\u5e8f\u90fd\u80fd\u5728\u7269\u7406\u5185\u5b58\u4e2d\u627e\u5230\u81ea\u5df1\u7684\u6570\u636e\u3002<\/p>\n

\u6b64\u5916\uff0cMMU\u8fd8\u8d1f\u8d23\u5185\u5b58\u7684\u4fdd\u62a4\uff0c\u786e\u4fdd\u8fdb\u7a0b\u4e0d\u80fd\u8bbf\u95ee\u5176\u4ed6\u8fdb\u7a0b\u7684\u5185\u5b58\uff0c\u9632\u6b62\u975e\u6cd5\u64cd\u4f5c\u5bf9\u7cfb\u7edf\u7a33\u5b9a\u6027\u7684\u7834\u574f\u3002\u5bf9\u4e8e\u73b0\u4ee3\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u73af\u5883\u4e2d\u7684\u591a\u4e2a\u5e76\u53d1\u8fdb\u7a0b\u6765\u8bf4\uff0c\u8fd9\u4e00\u529f\u80fd\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n

\u4e09\u3001\u865a\u62df\u5730\u5740\u5230\u7269\u7406\u5730\u5740\u7684\u8f6c\u6362\uff1aMMU\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n

3.1 \u9875\u8868\u4e0e\u5206\u9875\u673a\u5236<\/h4>\n

\u5206\u9875\u673a\u5236\u662fMMU\u7ba1\u7406\u5185\u5b58\u7684\u5173\u952e\uff0c\u5b83\u5c06\u865a\u62df\u5185\u5b58\u5212\u5206\u6210\u56fa\u5b9a\u5927\u5c0f\u7684\u9875\uff0c\u800c\u7269\u7406\u5185\u5b58\u5219\u5212\u5206\u6210\u9875\u6846\u3002MMU\u901a\u8fc7\u9875\u8868\u5c06\u865a\u62df\u9875\u4e0e\u7269\u7406\u9875\u6846\u5efa\u7acb\u8d77\u6620\u5c04\u5173\u7cfb\u3002\u6bcf\u5f53\u7a0b\u5e8f\u9700\u8981\u8bbf\u95ee\u5185\u5b58\u65f6\uff0cMMU\u4f1a\u5229\u7528\u9875\u8868\u5feb\u901f\u67e5\u627e\u865a\u62df\u5730\u5740\u5bf9\u5e94\u7684\u7269\u7406\u5730\u5740\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0cMMU\u4fdd\u8bc1\u4e86\u865a\u62df\u5185\u5b58\u7684\u7075\u6d3b\u6027\u548c\u9ad8\u6548\u6027\u3002<\/p>\n

\u5728\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u8fd9\u79cd\u5927\u89c4\u6a21\u670d\u52a1\u5668\u4e2d\uff0cMMU\u7684\u8fd9\u79cd\u673a\u5236\u5c24\u4e3a\u91cd\u8981\u3002\u56e0\u4e3a\u670d\u52a1\u5668\u9700\u8981\u5904\u7406\u5927\u91cf\u5e76\u53d1\u8bf7\u6c42\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u9700\u8981\u72ec\u7acb\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\uff0cMMU\u5728\u5176\u4e2d\u7684\u4f5c\u7528\u5c24\u4e3a\u5173\u952e\u3002<\/p>\n

3.2 TLB\u7f13\u5b58\uff1a\u63d0\u5347\u6027\u80fd\u7684\u79d8\u5bc6\u6b66\u5668<\/h4>\n

\u867d\u7136\u9875\u8868\u80fd\u6709\u6548\u5730\u5b8c\u6210\u865a\u62df\u5730\u5740\u5230\u7269\u7406\u5730\u5740\u7684\u8f6c\u6362\uff0c\u4f46\u6bcf\u6b21\u90fd\u8981\u8bbf\u95ee\u9875\u8868\u4f1a\u5bfc\u81f4\u6027\u80fd\u74f6\u9888\u3002\u4e3a\u6b64\uff0cMMU\u5f15\u5165\u4e86**TLB\uff08Translation Lookaside Buffer\uff09**\u7f13\u5b58\u673a\u5236\uff0c\u5c06\u6700\u8fd1\u4f7f\u7528\u7684\u9875\u8868\u9879\u5b58\u50a8\u5728\u9ad8\u901f\u7f13\u5b58\u4e2d\uff0c\u8fd9\u6837\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u5730\u5740\u8f6c\u6362\u7684\u901f\u5ea6\u3002<\/p>\n

\u5728\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u73af\u5883\u4e0b\uff0c\u5feb\u901f\u7684\u5185\u5b58\u8bbf\u95ee\u5bf9\u4e8e\u5904\u7406\u5927\u91cf\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u9ad8\u6548\u7684TLB\u673a\u5236\uff0c\u670d\u52a1\u5668\u80fd\u591f\u5728\u77ed\u65f6\u95f4\u5185\u5b8c\u6210\u865a\u62df\u5730\u5740\u5230\u7269\u7406\u5730\u5740\u7684\u8f6c\u6362\uff0c\u786e\u4fdd\u4e86\u670d\u52a1\u5668\u7684\u9ad8\u6548\u6027\u3002<\/p>\n

\u56db\u3001\u5185\u5b58\u4fdd\u62a4\uff1a\u4e3a\u7cfb\u7edf\u5b89\u5168\u62a4\u822a<\/h3>\n

\u5728\u591a\u7528\u6237\u548c\u591a\u8fdb\u7a0b\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u9700\u8981\u5728\u72ec\u7acb\u7684\u5185\u5b58\u7a7a\u95f4\u4e2d\u8fd0\u884c\uff0cMMU\u901a\u8fc7\u5185\u5b58\u4fdd\u62a4\u673a\u5236\u786e\u4fdd\u8fdb\u7a0b\u95f4\u7684\u5185\u5b58\u9694\u79bb\u3002\u5f53\u8fdb\u7a0b\u8bd5\u56fe\u8bbf\u95ee\u672a\u88ab\u6388\u6743\u7684\u5185\u5b58\u65f6\uff0cMMU\u4f1a\u7acb\u5373\u53d1\u51fa\u5f02\u5e38\u5e76\u7ec8\u6b62\u4e0d\u5408\u6cd5\u7684\u8bbf\u95ee\u3002\u901a\u8fc7\u8fd9\u79cd\u673a\u5236\uff0cMMU\u786e\u4fdd\u4e86\u64cd\u4f5c\u7cfb\u7edf\u7684\u5b89\u5168\u6027\uff0c\u9632\u6b62\u4e86\u6076\u610f\u7a0b\u5e8f\u7684\u653b\u51fb\u3002<\/p>\n

\u5bf9\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668<\/strong><\/a>\u800c\u8a00\uff0c\u8fd9\u79cd\u5185\u5b58\u4fdd\u62a4\u673a\u5236\u66f4\u662f\u4e0d\u53ef\u6216\u7f3a\u3002\u591a\u4e2a\u7528\u6237\u7684\u5e76\u53d1\u64cd\u4f5c\u4f7f\u5f97\u5185\u5b58\u5b89\u5168\u95ee\u9898\u5c24\u4e3a\u590d\u6742\uff0cMMU\u901a\u8fc7\u4e25\u683c\u7684\u5185\u5b58\u6743\u9650\u63a7\u5236\uff0c\u786e\u4fdd\u6bcf\u4e2a\u7528\u6237\u7684\u4efb\u52a1\u72ec\u7acb\u4e14\u5b89\u5168\u5730\u8fd0\u884c\u3002<\/p>\n

\u4e94\u3001\u603b\u7ed3<\/h3>\n

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