{"id":8200,"date":"2024-01-17T12:01:51","date_gmt":"2024-01-17T04:01:51","guid":{"rendered":"https:\/\/yanjingang.com\/blog\/?p=8200"},"modified":"2024-01-17T19:36:46","modified_gmt":"2024-01-17T11:36:46","slug":"cpu%e7%9a%84%e8%b0%83%e5%ba%a6%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/yanjingang.com\/blog\/?p=8200","title":{"rendered":"\u63a2\u7d22CPU\u7684\u8c03\u5ea6\u539f\u7406"},"content":{"rendered":"<p><span class=\"mod-overview__keyword\">\u8f6f\u4ef6\u5de5\u7a0b<\/span>\u5e08\u4eec\u603b\u4e60\u60ef\u628aOS\uff08Operating System\uff0c\u64cd\u4f5c\u7cfb\u7edf\uff09\u5f53\u6210\u662f\u4e00\u4e2a\u975e\u5e38\u503c\u5f97\u4fe1\u8d56\u7684\u7ba1\u5bb6\uff0c\u6211\u4eec\u53ea\u7ba1\u628a\u7a0b\u5e8f\u6258\u7ba1\u5230OS\u4e0a\u8fd0\u884c\uff0c\u5374\u5f88\u5c11\u6df1\u5165\u4e86\u89e3\u64cd\u4f5c\u7cfb\u7edf\u7684\u8fd0\u884c\u539f\u7406\u3002\u786e\u5b9e\uff0cOS\u4f5c\u4e3a\u4e00\u4e2a\u901a\u7528\u7684\u8f6f\u4ef6\u7cfb\u7edf\uff0c\u5728\u5927\u591a\u6570\u7684\u573a\u666f\u4e0b\u90fd\u8868\u73b0\u5f97\u8db3\u591f\u7684\u4f18\u79c0\u3002\u4f46\u4ecd\u4f1a\u6709\u4e00\u4e9b\u7279\u6b8a\u7684\u573a\u666f\uff0c\u9700\u8981\u6211\u4eec\u5bf9OS\u8fdb\u884c\u5404\u9879\u8c03\u4f18\uff0c\u624d\u80fd\u8ba9\u4e1a\u52a1\u7cfb\u7edf\u66f4\u9ad8\u6548\u5730\u5b8c\u6210\u4efb\u52a1\u3002\u8fd9\u5c31\u8981\u6c42\u6211\u4eec\u5fc5\u987b\u6df1\u5165\u4e86\u89e3OS\u7684\u539f\u7406\uff0c\u4e0d\u4ec5\u4ec5\u53ea\u4f1a\u4f7f\u5524\u8fd9\u4e2a\u7ba1\u5bb6\uff0c\u8fd8\u80fd\u61c2\u5f97\u5982\u4f55\u8ba9\u7ba1\u5bb6\u505a\u5f97\u66f4\u597d\u3002\u672c\u6587\u4e3b\u8981\u63a2\u7d22\u5176\u4e2d\u7684\u51b0\u5c71\u4e00\u89d2\uff1aCPU\u7684\u8c03\u5ea6\u539f\u7406\u3002<\/p>\n<h1>\u4e00\u3001\u6982\u8ff0<\/h1>\n<p>\u8bf4\u8d77CPU\u7684\u8c03\u5ea6\u539f\u7406\uff0c\u5f88\u591a\u4eba\u7684\u7b2c\u4e00\u53cd\u5e94\u662f\u57fa\u4e8e\u65f6\u95f4\u7247\u7684\u8c03\u5ea6\uff0c\u4e5f\u5373\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u5360\u7528CPU\u8fd0\u884c\u7684\u65f6\u95f4\u7247\uff0c\u65f6\u95f4\u7247\u7528\u5b8c\u4e4b\u540e\uff0c\u5c31\u8ba9\u51faCPU\u7ed9\u5176\u4ed6\u8fdb\u7a0b\u3002\u81f3\u4e8eOS\u662f\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u65f6\u95f4\u7247\u662f\u5426\u7528\u5b8c\u7684\u3001\u5982\u4f55\u5207\u6362\u5230\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u7b49\u7b49\u66f4\u6df1\u5c42\u7684\u539f\u7406\uff0c\u4e86\u89e3\u7684\u4eba\u4f3c\u4e4e\u5e76\u4e0d\u591a\u3002<\/p>\n<p>\u5176\u5b9e\uff0c\u57fa\u4e8e\u65f6\u95f4\u7247\u7684\u8c03\u5ea6\u53ea\u662f\u4f17\u591aCPU\u7684\u8c03\u5ea6\u7b97\u6cd5\u7684\u4e00\u7c7b\uff0c\u672c\u6587\u5c06\u4f1a\u4ece\u6700\u57fa\u7840\u7684\u8c03\u5ea6\u7b97\u6cd5\u8bf4\u8d77\uff0c\u9010\u4e2a\u5206\u6790\u5404\u79cd\u4e3b\u6d41\u8c03\u5ea6\u7b97\u6cd5\u7684\u539f\u7406\uff0c\u5e26\u5927\u5bb6\u4e00\u8d77\u63a2\u7d22CPU\u8c03\u5ea6\u7684\u5965\u79d8\u3002<\/p>\n<h3 id=\"5nq2l\">1. CPU\u7684\u4e0a\u4e0b\u6587\u5207\u6362<\/h3>\n<p>\u5728\u63a2\u7d22CPU\u8c03\u5ea6\u539f\u7406\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u4e86\u89e3\u4e00\u4e0bCPU\u7684\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u5b83\u662fCPU\u8c03\u5ea6\u7684\u57fa\u7840\u3002<\/p>\n<p>\u5982\u4eca\u7684OS\u51e0\u4e4e\u90fd\u652f\u6301&#8221;\u540c\u65f6&#8221;\u8fd0\u884c\u8fdc\u5927\u4e8eCPU\u6570\u91cf\u7684\u4efb\u52a1\uff0cOS\u4f1a\u5c06CPU\u8f6e\u6d41\u5206\u914d\u7ed9\u5b83\u4eec\u4f7f\u7528\u3002\u8fd9\u5c31\u8981\u6c42OS\u5fc5\u987b\u77e5\u9053\u4ece\u54ea\u91cc\u52a0\u8f7d\u4efb\u52a1\uff0c\u4ee5\u53ca\u52a0\u8f7d\u540e\u4ece\u54ea\u91cc\u5f00\u59cb\u8fd0\u884c\uff0c\u800c\u8fd9\u4e9b\u4fe1\u606f\u90fd\u4fdd\u5b58\u5728CPU\u7684\u5bc4\u5b58\u5668\u4e2d\uff0c\u5176\u4e2d\u5373\u5c06\u6267\u884c\u7684\u4e0b\u4e00\u6761\u6307\u4ee4\u7684\u5730\u5740\u88ab\u4fdd\u5b58\u5728\u7a0b\u5e8f\u8ba1\u6570\u5668\uff08PC\uff09\u8fd9\u4e00\u7279\u6b8a\u5bc4\u5b58\u5668\u4e0a\u3002\u6211\u4eec\u5c06\u5bc4\u5b58\u5668\u7684\u8fd9\u4e9b\u4fe1\u606f\u79f0\u4e3aCPU\u7684\u4e0a\u4e0b\u6587\uff0c\u4e5f\u53eb\u786c\u4ef6\u4e0a\u4e0b\u6587\u3002<\/p>\n<p>OS\u5728\u5207\u6362\u8fd0\u884c\u4efb\u52a1\u65f6\uff0c\u5c06\u4e0a\u4e00\u4efb\u52a1\u7684\u4e0a\u4e0b\u6587\u4fdd\u5b58\u4e0b\u6765\uff0c\u5e76\u5c06\u5373\u5c06\u8fd0\u884c\u7684\u4efb\u52a1\u7684\u4e0a\u4e0b\u6587\u52a0\u8f7d\u5230CPU\u5bc4\u5b58\u5668\u4e0a\u7684\u8fd9\u4e00\u52a8\u4f5c\uff0c\u88ab\u79f0\u4e3aCPU\u4e0a\u4e0b\u6587\u5207\u6362\u3002<\/p>\n<p><span style=\"font-size: 1rem;\">CPU\u4e0a\u4e0b\u6587\u5c5e\u4e8e\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u7684\u4e00\u90e8\u5206\uff0c\u6211\u4eec\u5e38\u8bf4\u7684\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u7531\u5982\u4e0b\u4e24\u90e8\u5206\u7ec4\u6210\uff1a<\/span><\/p>\n<ul class=\"ul-level-0\">\n<li>\u7528\u6237\u7ea7\u4e0a\u4e0b\u6587\uff1a\u5305\u542b\u8fdb\u7a0b\u7684\u8fd0\u884c\u65f6\u5806\u6808\u3001\u6570\u636e\u5757\u3001\u4ee3\u7801\u5757\u7b49\u4fe1\u606f\u3002<\/li>\n<li>\u7cfb\u7edf\u7ea7\u4e0a\u4e0b\u6587\uff1a\u5305\u542b\u8fdb\u7a0b\u6807\u8bc6\u4fe1\u606f\u3001\u8fdb\u7a0b\u73b0\u573a\u4fe1\u606f\uff08CPU\u4e0a\u4e0b\u6587\uff09\u3001\u8fdb\u7a0b\u63a7\u5236\u4fe1\u606f\u7b49\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u6d89\u53ca\u5230\u4e24\u4e2a\u95ee\u9898\uff1a\uff081\uff09\u4e0a\u4e00\u4efb\u52a1\u7684CPU\u4e0a\u4e0b\u6587\u5982\u4f55\u4fdd\u5b58\u4e0b\u6765\uff1f\uff082\uff09\u4ec0\u4e48\u65f6\u5019\u6267\u884c\u4e0a\u4e0b\u6587\u5207\u6362\uff1f<\/p>\n<h5>1.1 \u4e0a\u4e00\u4efb\u52a1\u7684CPU\u4e0a\u4e0b\u6587\u5982\u4f55\u4fdd\u5b58\u4e0b\u6765\uff1f<\/h5>\n<p>CPU\u4e0a\u4e0b\u6587\u4f1a\u88ab\u4fdd\u5b58\u5728\u8fdb\u7a0b\u7684\u5185\u6838\u7a7a\u95f4\uff08kernel space\uff09\u4e0a\u3002OS\u5728\u7ed9\u6bcf\u4e2a\u8fdb\u7a0b\u5206\u914d\u865a\u62df\u5185\u5b58\u7a7a\u95f4\u65f6\uff0c\u4f1a\u5206\u914d\u4e00\u4e2a\u5185\u6838\u7a7a\u95f4\uff0c\u8fd9\u90e8\u5206\u5185\u5b58\u53ea\u80fd\u7531\u5185\u6838\u4ee3\u7801\u8bbf\u95ee\u3002OS\u5728\u5207\u6362CPU\u4e0a\u4e0b\u6587\u524d\uff0c\u4f1a\u5148\u5c06\u5f53\u524dCPU\u7684\u901a\u7528\u5bc4\u5b58\u5668\u3001PC\u7b49\u8fdb\u7a0b\u73b0\u573a\u4fe1\u606f\u4fdd\u5b58\u5728\u8fdb\u7a0b\u7684\u5185\u6838\u7a7a\u95f4\u4e0a\uff0c\u5f85\u4e0b\u6b21\u5207\u6362\u65f6\uff0c\u518d\u53d6\u51fa\u91cd\u65b0\u88c5\u8f7d\u5230CPU\u4e0a\uff0c\u4ee5\u6062\u590d\u4efb\u52a1\u7684\u8fd0\u884c\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8203\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context-1024x595.jpeg\" alt=\"\" width=\"625\" height=\"363\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context-1024x595.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context-300x174.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context-768x447.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context-1536x893.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context-624x363.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-context.jpeg 1720w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<h5>1.2 \u4ec0\u4e48\u65f6\u5019\u6267\u884c\u4e0a\u4e0b\u6587\u5207\u6362\uff1f<\/h5>\n<p>OS\u8981\u60f3\u8fdb\u884c\u4efb\u52a1\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u5fc5\u987b\u5360\u7528CPU\u6765\u6267\u884c\u5207\u6362\u903b\u8f91\u3002\u7136\u800c\uff0c\u7528\u6237\u7a0b\u5e8f\u8fd0\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0cCPU\u5df2\u7ecf\u88ab\u7528\u6237\u7a0b\u5e8f\u6240\u5360\u7528\uff0c\u4e5f\u5373OS\u5728\u6b64\u523b\u5e76\u672a\u5904\u4e8e\u8fd0\u884c\u72b6\u6001\uff0c\u81ea\u7136\u4e5f\u65e0\u6cd5\u6267\u884c\u4e0a\u4e0b\u6587\u5207\u6362\u3002\u9488\u5bf9\u8be5\u95ee\u9898\uff0c\u6709\u4e24\u79cd\u89e3\u51b3\u7b56\u7565\uff0c\u534f\u4f5c\u5f0f\u7b56\u7565\u4e0e\u62a2\u5360\u5f0f\u7b56\u7565\u3002<\/p>\n<p><strong>\u534f\u4f5c\u5f0f\u7b56\u7565<\/strong>\u4f9d\u8d56\u7528\u6237\u7a0b\u5e8f\u4e3b\u52a8\u8ba9\u51faCPU\uff0c\u6bd4\u5982\u6267\u884c\u7cfb\u7edf\u8c03\u7528\uff08System Call\uff09\u6216\u8005\u51fa\u73b0\u9664\u96f6\u7b49\u5f02\u5e38\u3002\u4f46\u8be5\u7b56\u7565\u5e76\u4e0d\u9760\u8c31\uff0c\u5982\u679c\u7528\u6237\u7a0b\u5e8f\u6ca1\u6709\u4e3b\u52a8\u8ba9\u51faCPU\uff0c\u751a\u81f3\u662f\u6076\u610f\u6b7b\u5faa\u73af\uff0c\u90a3\u4e48\u8be5\u7a0b\u5e8f\u5c06\u4f1a\u4e00\u76f4\u5360\u7528CPU\uff0c\u552f\u4e00\u7684\u6062\u590d\u624b\u6bb5\u5c31\u662f\u91cd\u542f\u7cfb\u7edf\u4e86\u3002<\/p>\n<p><strong>\u62a2\u5360\u5f0f\u7b56\u7565<\/strong>\u5219\u4f9d\u8d56\u786c\u4ef6\u7684\u5b9a\u65f6\u4e2d\u65ad\u673a\u5236\uff08Timer Interrupt\uff09\uff0cOS\u4f1a\u5728\u521d\u59cb\u5316\u65f6\u5411\u786c\u4ef6\u6ce8\u518c\u4e2d\u65ad\u5904\u7406\u56de\u8c03\uff08Interrupt Handler\uff09\u3002\u5f53\u786c\u4ef6\u4ea7\u751f\u4e2d\u65ad\u65f6\uff0c\u786c\u4ef6\u4f1a\u5c06CPU\u7684\u5904\u7406\u6743\u4ea4\u7ed9\u6765OS\uff0cOS\u5c31\u53ef\u4ee5\u5728\u4e2d\u65ad\u56de\u8c03\u4e0a\u5b9e\u73b0CPU\u4e0a\u4e0b\u6587\u7684\u5207\u6362\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8204\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt-1024x586.jpeg\" alt=\"\" width=\"625\" height=\"358\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt-1024x586.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt-300x172.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt-768x440.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt-1536x880.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt-624x357.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-interrupt.jpeg 1886w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<h3 id=\"a0umt\">2. \u8c03\u5ea6\u7684\u8861\u91cf\u6307\u6807<\/h3>\n<p>\u5bf9\u4e8e\u4e00\u79cdCPU\u8c03\u5ea6\u7b97\u6cd5\u7684\u597d\u574f\uff0c\u4e00\u822c\u90fd\u901a\u8fc7\u5982\u4e0b\u4e24\u4e2a\u6307\u6807\u6765\u8fdb\u884c\u8861\u91cf\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li>\u5468\u8f6c\u65f6\u95f4\uff08turnaround time\uff09\uff0c\u6307\u4ece\u4efb\u52a1\u5230\u8fbe\u81f3\u4efb\u52a1\u5b8c\u6210\u4e4b\u95f4\u7684\u65f6\u95f4\uff0c\u5373T_{turnaround}=T_{completiong}-T_{arrival}<\/li>\n<li>\u54cd\u5e94\u65f6\u95f4\uff08response time\uff09\uff0c\u6307\u4ece\u4efb\u52a1\u5230\u8fbe\u81f3\u4efb\u52a1\u9996\u6b21\u88ab\u8c03\u5ea6\u7684\u65f6\u95f4\uff0c\u5373T_{response}=T_{firstrun}-T_{arrival}<\/li>\n<\/ul>\n<p>\u4e24\u4e2a\u6307\u6807\u4ece\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u662f\u5bf9\u7acb\u7684\uff0c\u8981\u6c42\u9ad8\u7684\u5e73\u5747\u5468\u8f6c\u65f6\u95f4\uff0c\u5fc5\u7136\u4f1a\u964d\u4f4e\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\u3002\u5177\u4f53\u8ffd\u6c42\u54ea\u79cd\u6307\u6807\u4e0e\u4efb\u52a1\u7c7b\u578b\u6709\u5173\uff0c\u6bd4\u5982\u7a0b\u5e8f\u7f16\u8bd1\u7c7b\u7684\u4efb\u52a1\uff0c\u8981\u6c42\u5468\u8f6c\u65f6\u95f4\u8981\u5c0f\uff0c\u5c3d\u53ef\u80fd\u5feb\u7684\u5b8c\u6210\u7f16\u8bd1\uff1b\u7528\u6237\u4ea4\u4e92\u7c7b\u7684\u4efb\u52a1\uff0c\u5219\u8981\u6c42\u54cd\u5e94\u65f6\u95f4\u8981\u5c0f\uff0c\u907f\u514d\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<h3>3. \u5de5\u4f5c\u8d1f\u8f7d\u5047\u8bbe<\/h3>\n<p>OS\u4e0a\u7684\u5de5\u4f5c\u8d1f\u8f7d\uff08\u4e5f\u5373\u5404\u7c7b\u4efb\u52a1\u8fd0\u884c\u7684\u72b6\u51b5\uff09\u603b\u662f\u5343\u53d8\u4e07\u5316\u7684\uff0c\u4e3a\u4e86\u66f4\u597d\u7684\u7406\u89e3\u5404\u7c7bCPU\u8c03\u5ea6\u7b97\u6cd5\u539f\u7406\uff0c\u6211\u4eec\u5148\u5bf9\u5de5\u4f5c\u8d1f\u8f7d\u8fdb\u884c\u6765\u5982\u4e0b\u51e0\u79cd\u5047\u8bbe\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li>\u5047\u8bbe1\uff1a\u6240\u6709\u4efb\u52a1\u90fd\u8fd0\u884c\u65f6\u957f\u90fd\u76f8\u540c\u3002<\/li>\n<li>\u5047\u8bbe2\uff1a\u6240\u6709\u4efb\u52a1\u7684\u5f00\u59cb\u65f6\u95f4\u90fd\u662f\u76f8\u540c\u7684<\/li>\n<li>\u5047\u8bbe3\uff1a\u4e00\u65e6\u4efb\u52a1\u5f00\u59cb\uff0c\u5c31\u4f1a\u4e00\u76f4\u8fd0\u884c\uff0c\u76f4\u81f3\u4efb\u52a1\u5b8c\u6210\u3002<\/li>\n<li>\u5047\u8bbe4\uff1a\u6240\u6709\u4efb\u52a1\u53ea\u4f7f\u7528CPU\u8d44\u6e90\uff08\u6bd4\u5982\u4e0d\u4ea7\u751fI\/O\u64cd\u4f5c\uff09\u3002<\/li>\n<li>\u5047\u8bbe5\uff1a\u9884\u5148\u77e5\u9053\u6240\u6709\u4efb\u52a1\u7684\u8fd0\u884c\u65f6\u957f\u3002<\/li>\n<\/ul>\n<p>\u51c6\u5907\u5de5\u4f5c\u5df2\u7ecf\u505a\u597d\uff0c\u4e0b\u9762\u6211\u4eec\u5f00\u59cb\u8fdb\u5165CPU\u8c03\u5ea6\u7b97\u6cd5\u7684\u5947\u5999\u4e16\u754c\u3002<\/p>\n<h1>\u4e8c\u3001CPU\u8c03\u5ea6\u7b97\u6cd5<\/h1>\n<h3 id=\"nmd3\">1. FIFO\uff1a\u5148\u8fdb\u5148\u51fa<\/h3>\n<p>FIFO\uff08First In First Out\uff0c\u5148\u8fdb\u5148\u51fa\uff09\u8c03\u5ea6\u7b97\u6cd5\u4ee5\u539f\u7406\u7b80\u5355\uff0c\u5bb9\u6613\u5b9e\u73b0\u8457\u79f0\uff0c\u5b83<strong>\u5148\u8c03\u5ea6\u9996\u5148\u5230\u8fbe\u7684\u4efb\u52a1\u76f4\u81f3\u7ed3\u675f\uff0c\u7136\u540e\u518d\u8c03\u5ea6\u4e0b\u4e00\u4e2a\u4efb\u52a1\uff0c\u4ee5\u6b64\u7c7b\u63a8<\/strong>\u3002\u5982\u679c\u6709\u591a\u4e2a\u4efb\u52a1\u540c\u65f6\u5230\u8fbe\uff0c\u5219\u968f\u673a\u9009\u4e00\u4e2a\u3002<\/p>\n<p>\u5728\u6211\u4eec\u5047\u8bbe\u7684\u5de5\u4f5c\u8d1f\u8f7d\u72b6\u51b5\u4e0b\uff0cFIFO\u6548\u7387\u826f\u597d\u3002\u6bd4\u5982\u6709A\u3001B\u3001C\u4e09\u4e2a\u4efb\u52a1\u6ee1\u8db3\u4e0a\u8ff0\u6240\u6709\u8d1f\u8f7d\u5047\u8bbe\uff0c\u6bcf\u4e2a\u4efb\u52a1\u8fd0\u884c\u65f6\u957f\u4e3a10s\uff0c\u5728t=0\u65f6\u523b\u5230\u8fbe\uff0c\u90a3\u4e48\u4efb\u52a1\u8c03\u5ea6\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8209\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-1024x406.jpeg\" alt=\"\" width=\"625\" height=\"248\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-1024x406.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-300x119.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-768x305.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-1536x610.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-624x248.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo.jpeg 1638w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u6839\u636eFIFO\u7684\u8c03\u5ea6\u539f\u7406\uff0cA\u3001B\u3001C\u5206\u522b\u572810\u300120\u300130\u65f6\u523b\u5b8c\u6210\u4efb\u52a1\uff0c\u5e73\u5747\u5468\u8f6c\u65f6\u95f4\u4e3a20s\uff08\u00a0 {10+20+30}\/{3}\uff09\uff0c\u6548\u679c\u5f88\u597d\u3002<\/p>\n<p>\u7136\u800c\u73b0\u5b9e\u603b\u662f\u6b8b\u9177\u7684\uff0c\u5982\u679c<strong>\u5047\u8bbe1<\/strong>\u88ab\u6253\u7834\uff0c\u6bd4\u5982A\u7684\u8fd0\u884c\u65f6\u95f4\u53d8\u6210100s\uff0cB\u548cC\u7684\u8fd8\u662f10s\uff0c\u90a3\u4e48\u8c03\u5ea6\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8230\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc-1024x423.jpeg\" alt=\"\" width=\"625\" height=\"258\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc-1024x423.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc-300x124.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc-768x318.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc-1536x635.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc-624x258.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-fifo-bc.jpeg 1640w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u6839\u636eFIFO\u7684\u8c03\u5ea6\u539f\u7406\uff0c\u7531\u4e8eA\u7684\u8fd0\u884c\u65f6\u95f4\u8fc7\u957f\uff0cB\u548cC\u957f\u65f6\u95f4\u5f97\u4e0d\u5230\u8c03\u5ea6\uff0c\u5bfc\u81f4\u5e73\u5747\u5468\u8f6c\u65f6\u95f4\u6076\u5316\u4e3a110\uff08{100+110+120}\/{3}\uff09\u3002<\/p>\n<p>\u56e0\u6b64\uff0c<strong>FIFO\u8c03\u5ea6\u7b56\u7565\u5728\u4efb\u52a1\u8fd0\u884c\u65f6\u95f4\u5dee\u5f02\u8f83\u5927\u7684\u573a\u666f\u4e0b\uff0c\u5bb9\u6613\u51fa\u73b0\u4efb\u52a1\u997f\u6b7b\u7684\u95ee\u9898<\/strong>\uff01<\/p>\n<p>\u9488\u5bf9\u8fd9\u4e2a\u95ee\u9898\uff0c\u5982\u679c\u8fd0\u884c\u65f6\u95f4\u8f83\u77ed\u7684B\u548cC\u5148\u88ab\u8c03\u5ea6\uff0c\u95ee\u9898\u5c31\u53ef\u4ee5\u89e3\u51b3\u4e86\uff0c\u8fd9\u6b63\u662fSJF\u8c03\u5ea6\u7b97\u6cd5\u7684\u601d\u60f3\u3002<\/p>\n<h3 id=\"c9sgo\">2. SJF\uff1a\u6700\u77ed\u4efb\u52a1\u4f18\u5148<\/h3>\n<p>SJF\uff08Shortest Job First\uff0c\u6700\u77ed\u4efb\u52a1\u4f18\u5148\uff09<strong>\u4ece\u76f8\u540c\u5230\u8fbe\u65f6\u95f4\u7684\u591a\u4e2a\u4efb\u52a1\u4e2d\u9009\u53d6\u8fd0\u884c\u65f6\u957f\u6700\u77ed\u7684\u4e00\u4e2a\u4efb\u52a1\u8fdb\u884c\u8c03\u5ea6\uff0c\u63a5\u7740\u518d\u8c03\u5ea6\u7b2c\u4e8c\u77ed\u7684\u4efb\u52a1\uff0c\u4ee5\u6b64\u7c7b\u63a8<\/strong>\u3002<\/p>\n<p>\u9488\u5bf9\u4e0a\u4e00\u8282\u7684\u5de5\u4f5c\u8d1f\u8f7d\uff0c\u4f7f\u7528SJF\u8fdb\u884c\u8c03\u5ea6\u7684\u60c5\u51b5\u5982\u4e0b\uff0c\u5468\u8f6c\u65f6\u95f4\u53d8\u6210\u4e8650s\uff08 {10+20+120}\/{3}\uff09\uff0c\u76f8\u6bd4FIFO\u7684110s\uff0c\u6709\u4e862\u500d\u591a\u7684\u63d0\u5347\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8229\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-1024x425.jpeg\" alt=\"\" width=\"625\" height=\"259\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-1024x425.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-300x124.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-768x318.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-1536x637.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-624x259.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf.jpeg 1640w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u8ba9\u6211\u4eec\u7ee7\u7eed\u6253\u7834<strong>\u5047\u8bbe2<\/strong>\uff0cA\u5728t=0\u65f6\u523b\uff0cB\u548cC\u5219\u5728t=10\u65f6\u523b\u5230\u8fbe\uff0c\u90a3\u4e48\u8c03\u5ea6\u60c5\u51b5\u4f1a\u53d8\u6210\u8fd9\u6837\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8228\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc-1024x423.jpeg\" alt=\"\" width=\"625\" height=\"258\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc-1024x423.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc-300x124.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc-768x318.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc-1536x635.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc-624x258.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-sjf-bc.jpeg 1640w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u56e0\u4e3a\u4efb\u52a1B\u548cC\u6bd4A\u540e\u5230\uff0c\u5b83\u4eec\u4e0d\u5f97\u4e0d\u4e00\u76f4\u7b49\u5f85A\u8fd0\u884c\u7ed3\u675f\u540e\u624d\u6709\u673a\u4f1a\u8c03\u5ea6\uff0c\u5373\u4f7fA\u9700\u8981\u957f\u65f6\u95f4\u8fd0\u884c\u3002\u5468\u8f6c\u65f6\u95f4\u6076\u5316\u4e3a103.33s\uff08 {100+(110-10)+(120-10)}\/{3}\uff09\uff0c\u518d\u6b21\u51fa\u73b0\u4efb\u52a1\u997f\u6b7b\u7684\u95ee\u9898\uff01<\/p>\n<h3 id=\"2i7qd\">3. STCF\uff1a\u6700\u77ed\u65f6\u95f4\u5b8c\u6210\u4f18\u5148<\/h3>\n<p>\u4e3a\u4e86\u89e3\u51b3SJF\u7684\u4efb\u52a1\u997f\u6b7b\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u6253\u7834<strong>\u5047\u8bbe3<\/strong>\uff0c\u4e5f\u5373\u4efb\u52a1\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u662f\u5141\u8bb8\u88ab\u6253\u65ad\u7684\u3002\u5982\u679cB\u548cC\u5728\u5230\u8fbe\u65f6\u5c31\u7acb\u5373\u88ab\u8c03\u5ea6\uff0c\u95ee\u9898\u5c31\u89e3\u51b3\u4e86\u3002\u8fd9\u5c5e\u4e8e\u62a2\u5360\u5f0f\u8c03\u5ea6\uff0c\u539f\u7406\u5c31\u662f<strong>CPU\u4e0a\u4e0b\u6587\u5207\u6362<\/strong>\u4e00\u8282\u63d0\u5230\u7684\uff0c\u5728\u4e2d\u65ad\u5b9a\u65f6\u5668\u5230\u8fbe\u4e4b\u540e\uff0cOS\u5b8c\u6210\u4efb\u52a1A\u548cB\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u3002<\/p>\n<p>\u6211\u4eec\u5728\u534f\u4f5c\u5f0f\u8c03\u5ea6\u7684SJF\u7b97\u6cd5\u7684\u57fa\u7840\u4e0a\uff0c\u52a0\u4e0a\u62a2\u5360\u5f0f\u8c03\u5ea6\u7b97\u6cd5\uff0c\u5c31\u6f14\u53d8\u6210\u4e86STCF\u7b97\u6cd5\uff08Shortest Time-to-Completion First\uff0c\u6700\u77ed\u65f6\u95f4\u5b8c\u6210\u4f18\u5148\uff09\uff0c\u8c03\u5ea6\u539f\u7406\u662f<strong>\u5f53\u8fd0\u884c\u65f6\u957f\u8f83\u77ed\u7684\u4efb\u52a1\u5230\u8fbe\u65f6\uff0c\u4e2d\u65ad\u5f53\u524d\u7684\u4efb\u52a1\uff0c\u4f18\u5148\u8c03\u5ea6\u8fd0\u884c\u65f6\u957f\u8f83\u77ed\u7684\u4efb\u52a1<\/strong>\u3002<\/p>\n<p>\u4f7f\u7528STCF\u7b97\u6cd5\u5bf9\u8be5\u5de5\u4f5c\u8d1f\u8f7d\u8fdb\u884c\u8c03\u5ea6\u7684\u60c5\u51b5\u5982\u4e0b\uff0c\u5468\u8f6c\u65f6\u95f4\u4f18\u5316\u4e3a50s\uff08{120+(20-10)+(30-10)}\/{3}\uff09\uff0c\u518d\u6b21\u89e3\u51b3\u4e86\u4efb\u52a1\u997f\u6b7b\u95ee\u9898\uff01<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8227\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-1024x425.jpeg\" alt=\"\" width=\"625\" height=\"259\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-1024x425.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-300x124.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-768x319.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-1536x637.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-624x259.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf.jpeg 1644w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u53ea\u5173\u5fc3\u4e86\u5468\u8f6c\u65f6\u95f4\u8fd9\u4e00\u8861\u91cf\u6307\u6807\uff0c\u90a3\u4e48FIFO\u3001SJF\u548cSTCF\u8c03\u5ea6\u7b97\u6cd5\u7684\u54cd\u5e94\u65f6\u95f4\u53c8\u662f\u591a\u957f\u5462\uff1f<\/p>\n<p>\u4e0d\u59a8\u5047\u8bbeA\u3001B\u3001C\u4e09\u4e2a\u4efb\u52a1\u90fd\u5728t=0\u65f6\u523b\u5230\u8fbe\uff0c\u8fd0\u884c\u65f6\u957f\u90fd\u662f5s\uff0c\u90a3\u4e48\u8fd9\u4e09\u4e2a\u7b97\u6cd5\u7684\u8c03\u5ea6\u60c5\u51b5\u5982\u4e0b\uff0c\u5e73\u5747\u54cd\u5e94\u65f6\u957f\u4e3a5s\uff08 {0+(5-0)+(10-0)}\/{3}\uff09\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8226\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc-1024x426.jpeg\" alt=\"\" width=\"625\" height=\"260\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc-1024x426.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc-300x125.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc-768x319.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc-1536x638.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc-624x259.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-stcf-bc.jpeg 1636w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u66f4\u7cdf\u7cd5\u7684\u662f\uff0c\u968f\u7740\u4efb\u52a1\u8fd0\u884c\u65f6\u957f\u7684\u589e\u957f\uff0c\u5e73\u5747\u54cd\u5e94\u65f6\u957f\u4e5f\u968f\u4e4b\u589e\u957f\uff0c\u8fd9\u5bf9\u4e8e\u4ea4\u4e92\u7c7b\u4efb\u52a1\u6765\u8bf4\u5c06\u4f1a\u662f\u707e\u96be\u6027\u7684\uff0c\u4e25\u91cd\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002\u8be5\u95ee\u9898\u7684\u6839\u6e90\u5728\u4e8e\uff0c\u5f53\u4efb\u52a1\u90fd\u540c\u65f6\u5230\u8fbe\u4e14\u8fd0\u884c\u65f6\u957f\u76f8\u540c\u65f6\uff0c\u6700\u540e\u4e00\u4e2a\u4efb\u52a1\u5fc5\u987b\u7b49\u5f85\u5176\u4ed6\u4efb\u52a1\u5168\u90e8\u5b8c\u6210\u4e4b\u540e\u624d\u5f00\u59cb\u8c03\u5ea6\u3002<\/p>\n<p>\u4e3a\u4e86\u4f18\u5316\u54cd\u5e94\u65f6\u95f4\uff0c\u6211\u4eec\u719f\u6089\u7684\u57fa\u4e8e\u65f6\u95f4\u7247\u7684\u8c03\u5ea6\u51fa\u73b0\u4e86\u3002<\/p>\n<h3 id=\"d8nlv\">4. RR\uff1a\u57fa\u4e8e\u65f6\u95f4\u7247\u7684\u8f6e\u8be2\u8c03\u5ea6<\/h3>\n<p><strong>RR\uff08Round Robin\uff0c\u8f6e\u8bad\uff09\u7b97\u6cd5\u7ed9\u6bcf\u4e2a\u4efb\u52a1\u5206\u914d\u4e00\u4e2a\u65f6\u95f4\u7247\uff0c\u5f53\u4efb\u52a1\u7684\u65f6\u95f4\u7247\u7528\u5b8c\u4e4b\u540e\uff0c\u8c03\u5ea6\u5668\u4f1a\u4e2d\u65ad\u5f53\u524d\u4efb\u52a1\uff0c\u5207\u6362\u5230\u4e0b\u4e00\u4e2a\u4efb\u52a1\uff0c\u4ee5\u6b64\u7c7b\u63a8<\/strong>\u3002<\/p>\n<blockquote><p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u65f6\u95f4\u7247\u7684\u957f\u5ea6\u8bbe\u7f6e\u5fc5\u987b\u662f\u4e2d\u65ad\u5b9a\u65f6\u5668\u7684\u6574\u6570\u500d\uff0c\u6bd4\u5982\u4e2d\u65ad\u5b9a\u65f6\u5668\u65f6\u957f\u4e3a2ms\uff0c\u90a3\u4e48\u4efb\u52a1\u7684\u65f6\u95f4\u7247\u53ef\u4ee5\u8bbe\u7f6e\u4e3a2ms\u30014ms\u30016ms &#8230; \u5426\u5219\u5373\u4f7f\u4efb\u52a1\u7684\u65f6\u95f4\u7247\u7528\u5b8c\u4e4b\u540e\uff0c\u5b9a\u65f6\u4e2d\u65ad\u6ca1\u53d1\u751f\uff0cOS\u4e5f\u65e0\u6cd5\u5207\u6362\u4efb\u52a1\u3002<\/p><\/blockquote>\n<p>\u73b0\u5728\uff0c\u4f7f\u7528RR\u8fdb\u884c\u8c03\u5ea6\uff0c\u7ed9A\u3001B\u3001C\u5206\u914d\u4e00\u4e2a1s\u7684\u65f6\u95f4\u7247\uff0c\u90a3\u4e48\u8c03\u5ea6\u60c5\u51b5\u5982\u4e0b\uff0c\u5e73\u5747\u54cd\u5e94\u65f6\u957f\u4e3a1s\uff08{0+(1-0)+(2-0)}\/{3}\uff09\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8225\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-1024x427.jpeg\" alt=\"\" width=\"625\" height=\"261\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-1024x427.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-300x125.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-768x320.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-1536x640.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-624x260.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr.jpeg 1632w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u4eceRR\u7684\u8c03\u5ea6\u539f\u7406\u53ef\u4ee5\u53d1\u73b0\uff0c\u628a\u65f6\u95f4\u7247\u8bbe\u7f6e\u5f97\u8d8a\u5c0f\uff0c\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\u4e5f\u8d8a\u5c0f\u3002\u4f46\u968f\u7740\u65f6\u95f4\u7247\u7684\u53d8\u5c0f\uff0c\u4efb\u52a1\u5207\u6362\u7684\u6b21\u6570\u4e5f\u968f\u4e4b\u4e0a\u5347\uff0c\u4e5f\u5c31\u662f\u4e0a\u4e0b\u6587\u5207\u6362\u7684\u6d88\u8017\u4f1a\u53d8\u5927\u3002\u56e0\u6b64\uff0c\u65f6\u95f4\u7247\u5927\u5c0f\u7684\u8bbe\u7f6e\u662f\u4e00\u4e2atrade-off\u7684\u8fc7\u7a0b\uff0c\u4e0d\u80fd\u4e00\u5473\u8ffd\u6c42\u54cd\u5e94\u65f6\u95f4\u800c\u5ffd\u7565CPU\u4e0a\u4e0b\u6587\u5207\u6362\u5e26\u6765\u7684\u6d88\u8017\u3002<\/p>\n<blockquote><p>CPU\u4e0a\u4e0b\u6587\u5207\u6362\u7684\u6d88\u8017\uff0c\u4e0d\u53ea\u662f\u4fdd\u5b58\u548c\u6062\u590d\u5bc4\u5b58\u5668\u6240\u5e26\u6765\u7684\u6d88\u8017\u3002\u7a0b\u5e8f\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u9010\u6e10\u5728CPU\u5404\u7ea7\u7f13\u5b58\u3001TLB\u3001\u5206\u652f\u9884\u6d4b\u5668\u7b49\u786c\u4ef6\u4e0a\u5efa\u7acb\u5c5e\u4e8e\u81ea\u5df1\u7684\u7f13\u5b58\u6570\u636e\u3002\u5f53\u4efb\u52a1\u88ab\u5207\u6362\u540e\uff0c\u5c31\u610f\u5473\u7740\u53c8\u5f97\u91cd\u6765\u4e00\u904d\u7f13\u5b58\u9884\u70ed\uff0c\u8fd9\u4f1a\u5e26\u6765\u5de8\u5927\u7684\u6d88\u8017\u3002<\/p><\/blockquote>\n<p>\u53e6\u5916\uff0cRR\u8c03\u5ea6\u7b97\u6cd5\u7684\u5468\u8f6c\u65f6\u95f4\u4e3a14s\uff08{(13-0)+(14-0)+(15-0)}\/{3}\uff09\uff0c\u76f8\u6bd4\u4e8eFIFO\u3001SJF\u548cSTCF\u768410s\uff08{(5-0)+(10-0)+(15-0)}\/{3}\uff09\u5dee\u4e86\u4e0d\u5c11\u3002\u8fd9\u4e5f\u9a8c\u8bc1\u4e86\u4e4b\u524d\u6240\u8bf4\u7684\uff0c\u5468\u8f6c\u65f6\u95f4\u548c\u54cd\u5e94\u65f6\u95f4\u5728\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u662f\u5bf9\u7acb\u7684\uff0c\u5982\u679c\u60f3\u8981\u4f18\u5316\u5468\u8f6c\u65f6\u95f4\uff0c\u5efa\u8bae\u4f7f\u7528SJF\u548cSTCF\uff1b\u5982\u679c\u60f3\u8981\u4f18\u5316\u54cd\u5e94\u65f6\u95f4\uff0c\u5219\u5efa\u8bae\u4f7f\u7528RR\u3002<\/p>\n<h3 id=\"7r14k\">5. I\/O\u64cd\u4f5c\u5bf9\u8c03\u5ea6\u7684\u5f71\u54cd<\/h3>\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u5e76\u672a\u8003\u8651\u4efb\u4f55\u7684I\/O\u64cd\u4f5c\u3002\u6211\u4eec\u77e5\u9053\uff0c\u5f53\u89e6\u53d1I\/O\u64cd\u4f5c\u65f6\uff0c\u8fdb\u7a0b\u5e76\u4e0d\u4f1a\u5360\u7528CPU\uff0c\u800c\u662f\u963b\u585e\u7b49\u5f85I\/O\u64cd\u4f5c\u7684\u5b8c\u6210\u3002\u73b0\u5728\u8ba9\u6211\u4eec\u6253\u7834<strong>\u5047\u8bbe4<\/strong>\uff0c\u8003\u8651\u4efb\u52a1A\u548cB\u90fd\u5728t=0\u65f6\u523b\u5230\u8fbe\uff0c\u8fd0\u884c\u65f6\u957f\u90fd\u662f50ms\uff0c\u4f46A\u6bcf\u969410ms\u6267\u884c\u4e00\u6b21\u963b\u585e10ms\u7684I\/O\u64cd\u4f5c\uff0c\u800cB\u6ca1\u6709I\/O\u3002<\/p>\n<p>\u5982\u679c\u4f7f\u7528STCF\u8fdb\u884c\u8c03\u5ea6\uff0c\u8c03\u5ea6\u7684\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8224\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc-1024x367.jpeg\" alt=\"\" width=\"625\" height=\"224\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc-1024x367.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc-300x108.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc-768x275.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc-1536x551.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc-624x224.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-bc.jpeg 1774w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u4ece\u4e0a\u56fe\u770b\u51fa\uff0c\u4efb\u52a1A\u548cB\u7684\u8c03\u5ea6\u603b\u65f6\u957f\u8fbe\u5230\u4e86140ms\uff0c\u6bd4\u5b9e\u9645A\u548cB\u8fd0\u884c\u65f6\u957f\u603b\u548c100ms\u8981\u5927\u3002\u800c\u4e14A\u963b\u585e\u5728I\/O\u64cd\u4f5c\u671f\u95f4\uff0c\u8c03\u5ea6\u5668\u5e76\u6ca1\u6709\u5207\u6362\u5230B\uff0c\u5bfc\u81f4\u4e86CPU\u7684\u7a7a\u8f6c\uff01<\/p>\n<p>\u8981\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u53ea\u9700\u4f7f\u7528RR\u7684\u8c03\u5ea6\u7b97\u6cd5\uff0c\u7ed9\u4efb\u52a1A\u548cB\u5206\u914d10ms\u7684\u65f6\u95f4\u7247\uff0c\u8fd9\u6837\u5f53A\u963b\u585e\u5728I\/O\u64cd\u4f5c\u65f6\uff0c\u5c31\u53ef\u4ee5\u8c03\u5ea6B\uff0c\u800cB\u7528\u5b8c\u65f6\u95f4\u7247\u540e\uff0c\u6070\u597dA\u4e5f\u4eceI\/O\u963b\u585e\u4e2d\u8fd4\u56de\uff0c\u4ee5\u6b64\u7c7b\u63a8\uff0c\u8c03\u5ea6\u603b\u65f6\u957f\u4f18\u5316\u81f3100ms\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8223\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab-1024x382.jpeg\" alt=\"\" width=\"625\" height=\"233\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab-1024x382.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab-300x112.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab-768x286.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab-1536x573.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab-624x233.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-rr-ab.jpeg 1760w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u8be5\u8c03\u5ea6\u65b9\u6848\u662f\u5efa\u7acb\u5728<strong>\u5047\u8bbe5<\/strong>\u4e4b\u4e0a\u7684\uff0c\u4e5f\u5373\u8981\u6c42\u8c03\u5ea6\u5668\u9884\u5148\u77e5\u9053A\u548cB\u7684\u8fd0\u884c\u65f6\u957f\u3001I\/O\u64cd\u4f5c\u65f6\u95f4\u957f\u7b49\u4fe1\u606f\uff0c\u624d\u80fd\u5982\u6b64\u5145\u5206\u5730\u5229\u7528CPU\u3002\u7136\u800c\uff0c\u5b9e\u9645\u7684\u60c5\u51b5\u8fdc\u6bd4\u8fd9\u590d\u6742\uff0cI\/O\u963b\u585e\u65f6\u957f\u4e0d\u4f1a\u6bcf\u6b21\u90fd\u4e00\u6837\uff0c\u8c03\u5ea6\u5668\u4e5f\u65e0\u6cd5\u51c6\u786e\u77e5\u9053A\u548cB\u7684\u8fd0\u884c\u4fe1\u606f\u3002\u5f53<strong>\u5047\u8bbe5<\/strong>\u4e5f\u88ab\u6253\u7834\u65f6\uff0c\u8c03\u5ea6\u5668\u53c8\u8be5\u5982\u4f55\u5b9e\u73b0\u624d\u80fd\u6700\u5927\u7a0b\u5ea6\u4fdd\u8bc1CPU\u5229\u7528\u7387\uff0c\u4ee5\u53ca\u8c03\u5ea6\u7684\u5408\u7406\u6027\u5462\uff1f<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u4e00\u4e2a\u80fd\u591f\u5728\u6240\u6709\u5de5\u4f5c\u8d1f\u8f7d\u5047\u8bbe\u88ab\u6253\u7834\u7684\u60c5\u51b5\u4e0b\u4f9d\u7136\u8868\u73b0\u826f\u597d\uff0c\u88ab\u8bb8\u591a\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u91c7\u7528\u7684CPU\u8c03\u5ea6\u7b97\u6cd5\uff0cMLFQ\u3002<\/p>\n<h3 id=\"3r4up\">6. MLFQ\uff1a\u591a\u7ea7\u53cd\u9988\u961f\u5217<\/h3>\n<p>MLFQ\uff08Multi-Level Feedback Queue\uff0c\u591a\u7ea7\u53cd\u9988\u961f\u5217\uff09\u8c03\u5ea6\u7b97\u6cd5\u7684\u76ee\u6807\u5982\u4e0b\uff1a<\/p>\n<ol class=\"ol-level-0\">\n<li>\u4f18\u5316\u5468\u8f6c\u65f6\u95f4\u3002<\/li>\n<li>\u964d\u4f4e\u4ea4\u4e92\u7c7b\u4efb\u52a1\u7684\u54cd\u5e94\u65f6\u95f4\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<\/ol>\n<p>\u4ece\u524d\u9762\u5206\u6790\u6211\u4eec\u77e5\u9053\uff0c\u8981\u4f18\u5316\u5468\u8f6c\u65f6\u95f4\uff0c\u53ef\u4ee5\u4f18\u5148\u8c03\u5ea6\u8fd0\u884c\u65f6\u957f\u77ed\u7684\u4efb\u52a1\uff08\u50cfSJF\u548cSTCF\u7684\u505a\u6cd5\uff09\uff1b\u8981\u4f18\u5316\u54cd\u5e94\u65f6\u95f4\uff0c\u5219\u91c7\u7528\u7c7b\u4f3cRR\u7684\u57fa\u4e8e\u65f6\u95f4\u7247\u7684\u8c03\u5ea6\u3002\u7136\u800c\uff0c\u8fd9\u4e24\u4e2a\u76ee\u6807\u770b\u8d77\u6765\u662f\u77db\u76fe\u7684\uff0c\u8981\u964d\u4f4e\u54cd\u5e94\u65f6\u95f4\uff0c\u5fc5\u7136\u4f1a\u589e\u52a0\u5468\u8f6c\u65f6\u95f4\u3002<\/p>\n<p>\u90a3\u4e48\u5bf9MLFQ\u6765\u8bf4\uff0c\u5c31\u9700\u8981\u89e3\u51b3\u5982\u4e0b\u4e24\u4e2a\u95ee\u9898\uff1a<\/p>\n<ol class=\"ol-level-0\">\n<li>\u5728\u4e0d\u9884\u5148\u6e05\u695a\u4efb\u52a1\u7684\u8fd0\u884c\u4fe1\u606f\uff08\u5305\u62ec\u8fd0\u884c\u65f6\u957f\u3001I\/O\u64cd\u4f5c\u7b49\uff09\u7684\u524d\u63d0\u4e0b\uff0c\u5982\u4f55\u6743\u8861\u5468\u8f6c\u65f6\u95f4\u548c\u54cd\u5e94\u65f6\u95f4\uff1f<\/li>\n<li>\u5982\u4f55\u4ece\u5386\u53f2\u8c03\u5ea6\u4e2d\u5b66\u4e60\uff0c\u4ee5\u4fbf\u672a\u6765\u505a\u51fa\u66f4\u597d\u7684\u51b3\u7b56\uff1f<\/li>\n<\/ol>\n<h5 id=\"eh5nd\"><strong>6.1 \u5212\u5206\u4efb\u52a1\u7684\u4f18\u5148\u7ea7<\/strong><\/h5>\n<p>MLFQ\u4e0e\u524d\u6587\u4ecb\u7ecd\u7684\u51e0\u79cd\u8c03\u5ea6\u7b97\u6cd5\u6700\u663e\u8457\u7684\u7279\u70b9\u5c31\u662f\u65b0\u589e\u4e86\u4f18\u5148\u7ea7\u961f\u5217\u5b58\u653e\u4e0d\u540c\u4f18\u5148\u7ea7\u7684\u4efb\u52a1\uff0c\u5e76\u5b9a\u4e0b\u4e86\u5982\u4e0b\u4e24\u4e2a\u89c4\u5219\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li><strong>\u89c4\u52191<\/strong>\uff1a\u5982\u679cPriority(A) &gt; Priority(B)\uff0c\u5219\u8c03\u5ea6A<\/li>\n<li><strong>\u89c4\u52192<\/strong>\uff1a\u5982\u679cPriority(A) = Priority(B)\uff0c\u5219\u6309\u7167RR\u7b97\u6cd5\u8c03\u5ea6A\u548cB<\/li>\n<\/ul>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8222\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-1024x640.jpeg\" alt=\"\" width=\"625\" height=\"391\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-1024x640.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-300x188.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-768x480.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-1536x960.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-624x390.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq.jpeg 1574w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<figure class=\"\"><\/figure>\n<h5 id=\"c3f4f\"><strong>6.2 \u4f18\u5148\u7ea7\u7684\u53d8\u5316<\/strong><\/h5>\n<p>MLFQ\u5fc5\u987b\u8003\u8651\u6539\u53d8\u4efb\u52a1\u7684\u4f18\u5148\u7ea7\uff0c\u5426\u5219\u6839\u636e <strong>\u89c4\u52191<\/strong> \u548c <strong>\u89c4\u52192<\/strong> \uff0c\u5bf9\u4e8e\u4e0a\u56fe\u4e2d\u7684\u4efb\u52a1C\uff0c\u5728A\u548cB\u8fd0\u884c\u7ed3\u675f\u4e4b\u524d\uff0cC\u90fd\u4e0d\u4f1a\u83b7\u5f97\u8fd0\u884c\u7684\u673a\u4f1a\uff0c\u5bfc\u81f4C\u7684\u54cd\u5e94\u65f6\u95f4\u5f88\u957f\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u5b9a\u4e0b\u4e86\u5982\u4e0b\u51e0\u4e2a\u4f18\u5148\u7ea7\u53d8\u5316\u89c4\u5219\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li><strong>\u89c4\u52193<\/strong>\uff1a\u5f53\u4e00\u4e2a\u65b0\u7684\u4efb\u52a1\u5230\u8fbe\u65f6\uff0c\u5c06\u5b83\u653e\u5230\u6700\u9ad8\u4f18\u5148\u7ea7\u961f\u5217\u4e2d<\/li>\n<li><strong>\u89c4\u52194a<\/strong>\uff1a\u5982\u679c\u4efb\u52a1A\u8fd0\u884c\u4e86\u4e00\u4e2a\u65f6\u95f4\u7247\u90fd\u6ca1\u6709\u4e3b\u52a8\u8ba9\u51faCPU\uff08\u6bd4\u5982I\/O\u64cd\u4f5c\uff09\uff0c\u5219\u4f18\u5148\u7ea7\u964d\u4f4e\u4e00\u7ea7<\/li>\n<li><strong>\u89c4\u52194b<\/strong>\uff1a\u5982\u679c\u4efb\u52a1A\u5728\u65f6\u95f4\u7247\u7528\u5b8c\u4e4b\u524d\uff0c\u6709\u4e3b\u52a8\u8ba9\u51faCPU\uff0c\u5219\u4f18\u5148\u7ea7\u4fdd\u6301\u4e0d\u53d8<\/li>\n<\/ul>\n<blockquote><p>\u89c4\u52193\u4e3b\u8981\u8003\u8651\u5230\u8ba9\u65b0\u52a0\u5165\u7684\u4efb\u52a1\u90fd\u80fd\u5f97\u5230\u8c03\u5ea6\u673a\u4f1a\uff0c\u907f\u514d\u51fa\u73b0\u4efb\u52a1\u997f\u6b7b\u7684\u95ee\u9898 \u89c4\u52194a\u548c4b\u4e3b\u8981\u8003\u8651\u5230\uff0c\u4ea4\u4e92\u7c7b\u4efb\u52a1\u5927\u90fd\u662fshort-running\u7684\uff0c\u5e76\u4e14\u4f1a\u9891\u7e41\u8ba9\u51faCPU\uff0c\u56e0\u6b64\u4e3a\u4e86\u4fdd\u8bc1\u54cd\u5e94\u65f6\u95f4\uff0c\u9700\u8981\u4fdd\u6301\u73b0\u6709\u7684\u4f18\u5148\u7ea7\uff1b\u800cCPU\u5bc6\u96c6\u578b\u4efb\u52a1\uff0c\u5f80\u5f80\u4e0d\u4f1a\u592a\u5173\u6ce8\u54cd\u5e94\u65f6\u95f4\uff0c\u56e0\u6b64\u53ef\u4ee5\u964d\u4f4e\u4f18\u5148\u7ea7\u3002<\/p><\/blockquote>\n<p>\u6309\u7167\u4e0a\u8ff0\u89c4\u5219\uff0c\u5f53\u4e00\u4e2along-running\u4efb\u52a1A\u5230\u8fbe\u65f6\uff0c\u8c03\u5ea6\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-a.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8221\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-a-1024x519.jpeg\" alt=\"\" width=\"625\" height=\"317\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-a-1024x519.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-a-300x152.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-a-768x389.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-a-624x316.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-a.jpeg 1382w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u5982\u679c\u5728\u4efb\u52a1A\u8fd0\u884c\u5230t=100\u65f6\uff0cshort-time\u4efb\u52a1B\u5230\u8fbe\uff0c\u8c03\u5ea6\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ab.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8220\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ab-1024x498.jpeg\" alt=\"\" width=\"625\" height=\"304\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ab-1024x498.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ab-300x146.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ab-768x374.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ab-624x304.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ab.jpeg 1340w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u4ece\u4e0a\u8ff0\u8c03\u5ea6\u60c5\u51b5\u53ef\u4ee5\u770b\u51fa\uff0cMLFQ\u5177\u5907\u4e86STCF\u7684\u4f18\u70b9\uff0c\u5373\u53ef\u4ee5\u4f18\u5148\u5b8c\u6210short-running\u4efb\u52a1\u7684\u8c03\u5ea6\uff0c\u7f29\u77ed\u4e86\u5468\u8f6c\u65f6\u95f4\u3002<\/p>\n<p>\u5982\u679c\u4efb\u52a1A\u8fd0\u884c\u5230t=100\u65f6\uff0c\u4ea4\u4e92\u7c7b\u4efb\u52a1C\u5230\u8fbe\uff0c\u90a3\u4e48\u8c03\u5ea6\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8219\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac-1024x530.jpeg\" alt=\"\" width=\"625\" height=\"323\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac-1024x530.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac-300x155.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac-768x397.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac-1536x794.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac-624x323.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac.jpeg 1624w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p><strong>MLFQ\u4f1a\u5728\u4efb\u52a1\u5904\u4e8e\u963b\u585e\u65f6\u6309\u7167\u4f18\u5148\u7ea7\u9009\u62e9\u5176\u4ed6\u4efb\u52a1\u8fd0\u884c\uff0c\u907f\u514dCPU\u7a7a\u8f6c<\/strong>\u3002\u56e0\u6b64\uff0c\u5728\u4e0a\u56fe\u4e2d\uff0c\u5f53\u4efb\u52a1C\u5904\u4e8eI\/O\u963b\u585e\u72b6\u6001\u65f6\uff0c\u4efb\u52a1A\u5f97\u5230\u4e86\u8fd0\u884c\u65f6\u95f4\u7247\uff0c\u5f53\u4efb\u52a1C\u4eceI\/O\u963b\u585e\u4e0a\u8fd4\u56de\u65f6\uff0cA\u518d\u6b21\u6302\u8d77\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002\u53e6\u5916\uff0c\u56e0\u4e3a\u4efb\u52a1C\u5728\u65f6\u95f4\u7247\u4e4b\u5185\u51fa\u73b0\u4e3b\u52a8\u8ba9\u51faCPU\u7684\u884c\u4e3a\uff0cC\u7684\u4f18\u5148\u7ea7\u4e00\u76f4\u4fdd\u6301\u4e0d\u53d8\uff0c\u8fd9\u5bf9\u4e8e\u4ea4\u4e92\u7c7b\u4efb\u52a1\u800c\u8a00\uff0c\u6709\u6548\u63d0\u5347\u4e86\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<h5 id=\"c266a\"><strong>6.3 CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u997f\u6b7b\u95ee\u9898<\/strong><\/h5>\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0cMLFQ\u4f3c\u4e4e\u80fd\u591f\u540c\u65f6\u517c\u987e\u5468\u8f6c\u65f6\u95f4\uff0c\u4ee5\u53ca\u4ea4\u4e92\u7c7b\u4efb\u52a1\u7684\u54cd\u5e94\u65f6\u95f4\uff0c\u5b83\u771f\u7684\u5b8c\u7f8e\u4e86\u5417\uff1f<\/p>\n<p>\u8003\u8651\u5982\u4e0b\u573a\u666f\uff0c\u4efb\u52a1A\u8fd0\u884c\u5230t=100\u65f6\uff0c\u4ea4\u4e92\u7c7b\u4efb\u52a1C\u548cD\u540c\u65f6\u5230\u8fbe\uff0c\u90a3\u4e48\u8c03\u5ea6\u60c5\u51b5\u4f1a\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8218\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd-1024x571.jpeg\" alt=\"\" width=\"625\" height=\"349\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd-1024x571.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd-300x167.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd-768x428.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd-1536x856.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd-624x348.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd.jpeg 1586w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u7531\u6b64\u53ef\u89c1\uff0c\u5982\u679c\u5f53\u524d\u7cfb\u7edf\u4e0a\u5b58\u5728\u5f88\u591a\u4ea4\u4e92\u7c7b\u4efb\u52a1\u65f6\uff0cCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u5c06\u4f1a\u5b58\u5728\u997f\u6b7b\u7684\u53ef\u80fd\uff01<\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u53ef\u4ee5\u8bbe\u7acb\u4e86\u5982\u4e0b\u89c4\u5219\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li><strong>\u89c4\u52195<\/strong>\uff1a\u7cfb\u7edf\u8fd0\u884cS\u65f6\u957f\u4e4b\u540e\uff0c\u5c06\u6240\u6709\u4efb\u52a1\u653e\u5230\u6700\u9ad8\u4f18\u5148\u7ea7\u961f\u5217\u4e0a\uff08<strong>Priority Boost<\/strong>\uff09<\/li>\n<\/ul>\n<p>\u52a0\u4e0a\u8be5\u89c4\u5219\u4e4b\u540e\uff0c\u5047\u8bbe\u8bbe\u7f6eS\u4e3a50ms\uff0c\u90a3\u4e48\u8c03\u5ea6\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff0c\u997f\u6b7b\u95ee\u9898\u5f97\u5230\u89e3\u51b3\uff01<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8217\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5-1024x559.jpeg\" alt=\"\" width=\"625\" height=\"341\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5-1024x559.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5-300x164.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5-768x419.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5-1536x838.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5-624x340.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-acd5.jpeg 1602w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<h5 id=\"o9gp\"><strong>6.4 \u6076\u610f\u4efb\u52a1\u95ee\u9898<\/strong><\/h5>\n<p>\u8003\u8651\u5982\u4e0b\u4e00\u4e2a\u6076\u610f\u4efb\u52a1E\uff0c\u4e3a\u4e86\u957f\u65f6\u95f4\u5360\u7528CPU\uff0c\u4efb\u52a1E\u5728\u65f6\u95f4\u7247\u8fd8\u52691%\u65f6\u6545\u610f\u6267\u884cI\/O\u64cd\u4f5c\uff0c\u5e76\u5f88\u5feb\u8fd4\u56de\u3002\u6839\u636e<strong>\u89c4\u52194b<\/strong>\uff0cE\u5c06\u4f1a\u7ef4\u6301\u5728\u539f\u6765\u7684\u6700\u9ad8\u4f18\u5148\u7ea7\u961f\u5217\u4e0a\uff0c\u56e0\u6b64\u4e0b\u6b21\u8c03\u5ea6\u65f6\u4ecd\u7136\u83b7\u5f97\u8c03\u5ea6\u4f18\u5148\u6743\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8216\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae-1024x536.jpeg\" alt=\"\" width=\"625\" height=\"327\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae-1024x536.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae-300x157.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae-768x402.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae-1536x804.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae-624x327.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ae.jpeg 1666w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u5c06<strong>\u89c4\u52194<\/strong>\u8c03\u6574\u4e3a\u5982\u4e0b\u89c4\u5219\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li><strong>\u89c4\u52194<\/strong>\uff1a\u7ed9\u6bcf\u4e2a\u4f18\u5148\u7ea7\u5206\u914d\u4e00\u4e2a\u65f6\u95f4\u7247\uff0c\u5f53\u4efb\u52a1\u7528\u5b8c\u8be5\u4f18\u5148\u7ea7\u7684\u65f6\u95f4\u7247\u540e\uff0c\u4f18\u5148\u7ea7\u964d\u4e00\u7ea7<\/li>\n<\/ul>\n<p>\u5e94\u7528\u65b0\u7684<strong>\u89c4\u52194<\/strong>\u540e\uff0c\u76f8\u540c\u7684\u5de5\u4f5c\u8d1f\u8f7d\uff0c\u8c03\u5ea6\u60c5\u51b5\u53d8\u6210\u4e86\u5982\u4e0b\u6240\u8ff0\uff0c\u4e0d\u518d\u51fa\u73b0\u6076\u610f\u4efb\u52a1E\u5360\u7528\u5927\u91cfCPU\u7684\u95ee\u9898\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8215\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4-1024x545.jpeg\" alt=\"\" width=\"625\" height=\"333\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4-1024x545.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4-300x160.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4-768x409.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4-1536x817.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4-624x332.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-mlfq-ac4.jpeg 1718w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0cMLFQ\u7684\u57fa\u672c\u539f\u7406\u5df2\u7ecf\u4ecb\u7ecd\u5b8c\uff0c\u6700\u540e\uff0c\u6211\u4eec\u603b\u7ed3\u4e0bMLFQ\u6700\u5173\u952e\u76845\u9879\u89c4\u5219\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li><strong>\u89c4\u52191<\/strong>\uff1a\u5982\u679cPriority(A) &gt; Priority(B)\uff0c\u5219\u8c03\u5ea6A<\/li>\n<li><strong>\u89c4\u52192<\/strong>\uff1a\u5982\u679cPriority(A) = Priority(B)\uff0c\u5219\u6309\u7167RR\u7b97\u6cd5\u8c03\u5ea6A\u548cB<\/li>\n<li><strong>\u89c4\u52193<\/strong>\uff1a\u5f53\u4e00\u4e2a\u65b0\u7684\u4efb\u52a1\u5230\u8fbe\u65f6\uff0c\u5c06\u5b83\u653e\u5230\u6700\u9ad8\u4f18\u5148\u7ea7\u961f\u5217\u4e2d<\/li>\n<li><strong>\u89c4\u52194<\/strong>\uff1a\u7ed9\u6bcf\u4e2a\u4f18\u5148\u7ea7\u5206\u914d\u4e00\u4e2a\u65f6\u95f4\u7247\uff0c\u5f53\u4efb\u52a1\u7528\u5b8c\u8be5\u4f18\u5148\u7ea7\u7684\u65f6\u95f4\u7247\u540e\uff0c\u4f18\u5148\u7ea7\u964d\u4e00\u7ea7<\/li>\n<li><strong>\u89c4\u52195<\/strong>\uff1a\u7cfb\u7edf\u8fd0\u884cS\u65f6\u957f\u4e4b\u540e\uff0c\u5c06\u6240\u6709\u4efb\u52a1\u653e\u5230\u6700\u9ad8\u4f18\u5148\u7ea7\u961f\u5217\u4e0a\uff08<strong>Priority Boost<\/strong>\uff09<\/li>\n<\/ul>\n<p>\u73b0\u5728\uff0c\u518d\u56de\u5230\u672c\u8282\u5f00\u59cb\u65f6\u63d0\u51fa\u7684\u4e24\u4e2a\u95ee\u9898\uff1a<\/p>\n<p><em><strong>1\u3001\u5728\u4e0d\u9884\u5148\u6e05\u695a\u4efb\u52a1\u7684\u8fd0\u884c\u4fe1\u606f\uff08\u5305\u62ec\u8fd0\u884c\u65f6\u957f\u3001I\/O\u64cd\u4f5c\u7b49\uff09\u7684\u524d\u63d0\u4e0b\uff0cMLFQ\u5982\u4f55\u6743\u8861\u5468\u8f6c\u65f6\u95f4\u548c\u54cd\u5e94\u65f6\u95f4<\/strong><\/em>\uff1f<\/p>\n<p>\u5728\u9884\u5148\u4e0d\u6e05\u695a\u4efb\u52a1\u5230\u5e95\u662flong-running\u6216short-running\u7684\u60c5\u51b5\u4e0b\uff0cMLFQ\u4f1a\u5148\u5047\u8bbe\u4efb\u52a1\u5c5e\u4e8eshrot-running\u4efb\u52a1\uff0c\u5982\u679c\u5047\u8bbe\u6b63\u786e\uff0c\u4efb\u52a1\u5c31\u4f1a\u5f88\u5feb\u5b8c\u6210\uff0c\u5468\u8f6c\u65f6\u95f4\u548c\u54cd\u5e94\u65f6\u95f4\u90fd\u5f97\u5230\u4f18\u5316\uff1b\u5373\u4f7f\u5047\u8bbe\u9519\u8bef\uff0c\u4efb\u52a1\u7684\u4f18\u5148\u7ea7\u4e5f\u80fd\u9010\u6e10\u964d\u4f4e\uff0c\u628a\u66f4\u591a\u7684\u8c03\u5ea6\u673a\u4f1a\u8ba9\u7ed9\u5176\u4ed6short-running\u4efb\u52a1\u3002<\/p>\n<p><em><strong>2\u3001MLFQ\u5982\u4f55\u4ece\u5386\u53f2\u8c03\u5ea6\u4e2d\u5b66\u4e60\uff0c\u4ee5\u4fbf\u672a\u6765\u505a\u51fa\u66f4\u597d\u7684\u51b3\u7b56<\/strong><\/em>\uff1f<\/p>\n<p>MLFQ\u4e3b\u8981\u6839\u636e\u4efb\u52a1\u662f\u5426\u6709\u4e3b\u52a8\u8ba9\u51faCPU\u7684\u884c\u4e3a\u6765\u5224\u65ad\u5176\u662f\u5426\u662f\u4ea4\u4e92\u7c7b\u4efb\u52a1\uff0c\u5982\u679c\u662f\uff0c\u5219\u7ef4\u6301\u5728\u5f53\u524d\u7684\u4f18\u5148\u7ea7\uff0c\u4fdd\u8bc1\u8be5\u4efb\u52a1\u7684\u8c03\u5ea6\u4f18\u5148\u6743\uff0c\u63d0\u5347\u4ea4\u4e92\u7c7b\u4efb\u52a1\u7684\u54cd\u5e94\u6027\u3002<\/p>\n<p>\u5f53\u7136\uff0cMLFQ\u5e76\u975e\u5b8c\u7f8e\u7684\u8c03\u5ea6\u7b97\u6cd5\uff0c\u5b83\u4e5f\u5b58\u5728\u7740\u5404\u79cd\u95ee\u9898\uff0c\u5176\u4e2d\u6700\u8ba9\u4eba\u56f0\u6270\u7684\u5c31\u662fMLFQ\u5404\u9879\u53c2\u6570\u7684\u8bbe\u5b9a\uff0c\u6bd4\u5982\u4f18\u5148\u7ea7\u961f\u5217\u7684\u6570\u91cf\uff0c\u65f6\u95f4\u7247\u7684\u957f\u5ea6\u3001Priority Boost\u7684\u95f4\u9694\u7b49\u3002\u8fd9\u4e9b\u53c2\u6570\u5e76\u6ca1\u6709\u5b8c\u7f8e\u7684\u53c2\u8003\u503c\uff0c\u53ea\u80fd\u6839\u636e\u4e0d\u540c\u7684\u5de5\u4f5c\u8d1f\u8f7d\u6765\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n<blockquote><p>\u6bd4\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4f4e\u4f18\u5148\u7ea7\u961f\u5217\u4e0a\u4efb\u52a1\u7684\u65f6\u95f4\u7247\u8bbe\u7f6e\u957f\u4e00\u4e9b\uff0c\u56e0\u4e3a\u4f4e\u4f18\u5148\u7ea7\u7684\u4efb\u52a1\u5f80\u5f80\u662fCPU\u5bc6\u96c6\u578b\u4efb\u52a1\uff0c\u5b83\u4eec\u4e0d\u592a\u5173\u5fc3\u54cd\u5e94\u65f6\u95f4\uff0c\u8f83\u957f\u7684\u65f6\u95f4\u7247\u957f\u80fd\u591f\u51cf\u5c11\u4e0a\u4e0b\u6587\u5207\u6362\u5e26\u6765\u7684\u6d88\u8017\u3002<\/p><\/blockquote>\n<h3 id=\"4vf20\">7. CFS\uff1aLinux\u7684\u5b8c\u5168\u516c\u5e73\u8c03\u5ea6<\/h3>\n<p>\u672c\u8282\u6211\u4eec\u5c06\u4ecb\u7ecd\u4e00\u4e2a\u5e73\u65f6\u6253\u4ea4\u9053\u6700\u591a\u7684\u8c03\u5ea6\u7b97\u6cd5\uff0c<span class=\"mod-overview__keyword\">Linux<\/span>\u7cfb\u7edf\u4e0b\u7684CFS\uff08Completely Fair Scheduler\uff0c\u5b8c\u5168\u516c\u5e73\u8c03\u5ea6\uff09\u3002\u4e0e\u4e0a\u4e00\u8282\u4ecb\u7ecd\u7684MLFQ\u4e0d\u540c\uff0c<strong>CFS\u5e76\u975e\u4ee5\u4f18\u5316\u5468\u8f6c\u65f6\u95f4\u548c\u54cd\u5e94\u65f6\u95f4\u4e3a\u76ee\u6807\uff0c\u800c\u662f\u5e0c\u671b\u5c06CPU\u516c\u5e73\u5730\u5747\u5206\u7ed9\u6bcf\u4e2a\u4efb\u52a1<\/strong>\u3002<\/p>\n<blockquote><p>\u5f53\u7136\uff0cCFS\u4e5f\u63d0\u4f9b\u4e86\u7ed9\u8fdb\u7a0b\u8bbe\u7f6e\u4f18\u5148\u7ea7\u7684\u529f\u80fd\uff0c\u8ba9\u7528\u6237\/\u7ba1\u7406\u5458\u51b3\u5b9a\u54ea\u4e9b\u8fdb\u7a0b\u9700\u8981\u83b7\u5f97\u66f4\u591a\u7684\u8c03\u5ea6\u65f6\u95f4\u3002<\/p><\/blockquote>\n<h5 id=\"8ipee\"><strong>7.1 \u57fa\u672c\u539f\u7406<\/strong><\/h5>\n<p>\u5927\u90e8\u5206\u8c03\u5ea6\u7b97\u6cd5\u90fd\u662f\u57fa\u4e8e\u56fa\u5b9a\u65f6\u95f4\u7247\u6765\u8fdb\u884c\u8c03\u5ea6\uff0c\u800cCFS\u53e6\u8f9f\u8e4a\u5f84\uff0c\u91c7\u7528\u57fa\u4e8e\u8ba1\u6570\u7684\u8c03\u5ea6\u65b9\u6cd5\uff0c\u8be5\u6280\u672f\u88ab\u79f0\u4e3a<strong>virtual runtime<\/strong>\u3002<\/p>\n<p>CFS\u7ed9\u6bcf\u4e2a\u4efb\u52a1\u90fd\u7ef4\u62a4\u4e00\u4e2a<code>vruntime<\/code>\u503c\uff0c\u6bcf\u5f53\u4efb\u52a1\u88ab\u8c03\u5ea6\u4e4b\u540e\uff0c\u5c31\u7d2f\u52a0\u5b83\u7684<code>vruntime<\/code>\u3002\u6bd4\u5982\uff0c\u5f53\u4efb\u52a1A\u8fd0\u884c\u4e865ms\u7684\u65f6\u95f4\u7247\u4e4b\u540e\uff0c\u5219\u66f4\u65b0\u4e3a<code>vruntime += 5ms<\/code>\u3002<strong>CFS\u5728\u4e0b\u6b21\u8c03\u5ea6\u65f6\uff0c\u9009\u62e9<\/strong><code><strong>vruntime<\/strong><\/code><strong>\u503c\u6700\u5c0f\u7684\u4efb\u52a1\u6765\u8c03\u5ea6<\/strong>\uff0c\u6bd4\u5982\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8214\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-1024x555.jpeg\" alt=\"\" width=\"625\" height=\"339\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-1024x555.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-300x163.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-768x416.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-1536x832.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-624x338.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs.jpeg 1628w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p><em>\u90a3CFS\u5e94\u8be5\u4ec0\u4e48\u65f6\u5019\u8fdb\u884c\u4efb\u52a1\u5207\u6362\u5462<\/em>\uff1f\u5207\u6362\u5f97\u9891\u7e41\u4e9b\uff0c\u4efb\u52a1\u7684\u8c03\u5ea6\u4f1a\u66f4\u52a0\u7684\u516c\u5e73\uff0c\u4f46\u662f\u4e0a\u4e0b\u6587\u5207\u6362\u5e26\u6765\u7684\u6d88\u8017\u4e5f\u8d8a\u5927\u3002\u56e0\u6b64\uff0cCFS\u7ed9\u7528\u6237\u63d0\u4f9b\u4e86\u4e2a\u53ef\u914d\u53c2\u6570<code>sched_latency<\/code>\uff0c\u8ba9\u7528\u6237\u6765\u51b3\u5b9a\u5207\u6362\u7684\u65f6\u673a\u3002CFS\u5c06\u6bcf\u4e2a\u4efb\u52a1\u5206\u5230\u7684\u65f6\u95f4\u7247\u8bbe\u7f6e\u4e3a <code>time_slice = sched_latency \/ n<\/code>\uff08n\u4e3a\u5f53\u524d\u7684\u4efb\u52a1\u6570\uff09 \uff0c\u4ee5\u786e\u4fdd\u5728<code>sched_latency<\/code>\u5468\u671f\u5185\uff0c\u5404\u4efb\u52a1\u80fd\u591f\u5747\u5206CPU\uff0c\u4fdd\u8bc1\u516c\u5e73\u6027\u3002<\/p>\n<p>\u6bd4\u5982\u5c06<code>sched_latency<\/code>\u8bbe\u7f6e\u4e3a48ms\uff0c\u5f53\u524d\u67094\u4e2a\u4efb\u52a1A\u3001B\u3001C\u548cD\uff0c\u90a3\u4e48\u6bcf\u4e2a\u4efb\u52a1\u5206\u5230\u7684\u65f6\u95f4\u7247\u4e3a12ms\uff1b\u540e\u9762C\u548cD\u7ed3\u675f\u4e4b\u540e\uff0cA\u548cB\u5206\u5230\u7684\u65f6\u95f4\u7247\u4e5f\u66f4\u65b0\u4e3a24ms\uff1a<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8213\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd-1024x480.jpeg\" alt=\"\" width=\"625\" height=\"293\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd-1024x480.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd-300x141.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd-768x360.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd-1536x720.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd-624x293.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-abcd.jpeg 1710w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u4ece\u4e0a\u8ff0\u539f\u7406\u4e0a\u770b\uff0c\u5728<code>sched_latency<\/code> \u4e0d\u53d8\u7684\u60c5\u51b5\u4e0b\uff0c\u968f\u7740\u7cfb\u7edf\u4efb\u52a1\u6570\u7684\u589e\u52a0\uff0c\u6bcf\u4e2a\u4efb\u52a1\u5206\u5230\u7684\u65f6\u95f4\u7247\u4e5f\u968f\u4e4b\u51cf\u5c11\uff0c\u4efb\u52a1\u5207\u6362\u6240\u5e26\u6765\u7684\u6d88\u8017\u4e5f\u4f1a\u589e\u5927\u3002\u4e3a\u4e86\u907f\u514d\u8fc7\u591a\u7684\u4efb\u52a1\u5207\u6362\u6d88\u8017\uff0cCFS\u63d0\u4f9b\u4e86\u53ef\u914d\u53c2\u6570<code>min_granularity<\/code>\u6765\u8bbe\u7f6e\u4efb\u52a1\u7684\u6700\u5c0f\u65f6\u95f4\u7247\u3002\u6bd4\u5982<code>sched_latency<\/code>\u8bbe\u7f6e\u4e3a48ms\uff0c<code>min_granularity<\/code>\u8bbe\u7f6e\u4e3a 6ms\uff0c\u90a3\u4e48\u5373\u4f7f\u5f53\u524d\u4efb\u52a1\u6570\u670912\uff0c\u6bcf\u4e2a\u4efb\u52a1\u6570\u5206\u5230\u7684\u65f6\u95f4\u7247\u4e5f\u662f6ms\uff0c\u800c\u4e0d\u662f4ms\u3002<\/p>\n<h5 id=\"8mnoa\"><strong>7.2 \u7ed9\u4efb\u52a1\u5206\u914d\u6743\u91cd<\/strong><\/h5>\n<p>\u6709\u65f6\u5019\uff0c\u6211\u4eec\u5e0c\u671b\u7ed9\u7cfb\u7edf\u4e2d\u67d0\u4e2a\u91cd\u8981\u7684\u4e1a\u52a1\u8fdb\u7a0b\u591a\u5206\u914d\u4e9b\u65f6\u95f4\u7247\uff0c\u800c\u5176\u4ed6\u4e0d\u91cd\u8981\u7684\u8fdb\u7a0b\u5219\u5c11\u5206\u914d\u4e9b\u65f6\u95f4\u7247\u3002\u4f46\u6309\u7167\u4e0a\u4e00\u8282\u4ecb\u7ecd\u7684\u57fa\u672c\u539f\u7406\uff0c\u4f7f\u7528CFS\u8c03\u5ea6\u65f6\uff0c\u6bcf\u4e2a\u4efb\u52a1\u90fd\u662f\u5747\u5206CPU\u7684\uff0c\u6709\u6ca1\u6709\u529e\u6cd5\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\u5462\uff1f<\/p>\n<p><strong>\u53ef\u4ee5\u7ed9\u4efb\u52a1\u5206\u914d\u6743\u91cd\uff0c\u8ba9\u6743\u91cd\u9ad8\u7684\u4efb\u52a1\u66f4\u591a\u7684CPU<\/strong>\uff01<\/p>\n<p>\u52a0\u4e0a\u6743\u91cd\u673a\u5236\u540e\uff0c\u4efb\u52a1\u65f6\u95f4\u7247\u7684\u8ba1\u7b97\u65b9\u5f0f\u53d8\u6210\u4e86\u8fd9\u6837\uff1a<\/p>\n<p>$$ time\\_slice_{k}={weight_k}\/{\\sum_{i=0}^{n-1}weight_{i}}*sched\\_latency $$<\/p>\n<p>\u6bd4\u5982\uff0c<code>sched_latency<\/code>\u8fd8\u662f\u8bbe\u7f6e\u4e3a48ms\uff0c\u73b0\u6709A\u548cB\u4e24\u4e2a\u4efb\u52a1\uff0cA\u7684\u6743\u91cd\u8bbe\u7f6e\u4e3a1024\uff0cB\u7684\u6743\u91cd\u8bbe\u7f6e\u4e3a3072\uff0c\u6309\u7167\u4e0a\u8ff0\u7684\u516c\u5f0f\uff0cA\u7684\u65f6\u95f4\u7247\u662f12ms\uff0cB\u7684\u65f6\u95f4\u7247\u662f36ms\u3002<\/p>\n<p>\u4ece\u4e0a\u4e00\u8282\u53ef\u77e5\uff0cCFS\u6bcf\u6b21\u9009\u53d6<code>vruntime<\/code>\u503c\u6700\u5c0f\u7684\u4efb\u52a1\u6765\u8c03\u5ea6\uff0c\u800c\u6bcf\u6b21\u8c03\u5ea6\u5b8c\u6210\u540e\uff0c<code>vruntime<\/code>\u7684\u8ba1\u7b97\u89c4\u5219\u4e3a<code>vruntime += runtime<\/code>\uff0c\u56e0\u6b64\u4ec5\u4ec5\u6539\u53d8\u65f6\u95f4\u7247\u7684\u8ba1\u7b97\u89c4\u5219\u4e0d\u4f1a\u751f\u6548\uff0c\u8fd8\u9700\u5c06<code>vruntime<\/code>\u7684\u8ba1\u7b97\u89c4\u5219\u8c03\u6574\u4e3a\uff1a<\/p>\n<p>$$ vruntime_{i}=vruntime_{i}+{weight_{0}}\/{weight_{i}}*runtime_{i} $$<\/p>\n<p>\u8fd8\u662f\u524d\u9762\u7684\u4f8b\u5b50\uff0c\u5047\u8bbeA\u548cB\u90fd\u6ca1\u6709I\/O\u64cd\u4f5c\uff0c\u66f4\u65b0<code>vruntime<\/code>\u8ba1\u7b97\u89c4\u5219\u540e\uff0c\u8c03\u5ea6\u60c5\u51b5\u5982\u4e0b\uff0c\u4efb\u52a1B\u6bd4\u4efb\u52a1A\u80fd\u591f\u5206\u5f97\u66f4\u591a\u7684CPU\u4e86\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8212\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab-1024x503.jpeg\" alt=\"\" width=\"625\" height=\"307\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab-1024x503.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab-300x147.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab-768x377.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab-1536x754.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab-624x306.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-ab.jpeg 1792w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<h5 id=\"6arsq\"><strong>7.3 \u4f7f\u7528\u7ea2\u9ed1\u6811\u63d0\u5347vruntime\u67e5\u627e\u6548\u7387<\/strong><\/h5>\n<p>CFS\u6bcf\u6b21\u5207\u6362\u4efb\u52a1\u65f6\uff0c\u90fd\u4f1a\u9009\u53d6<code>vruntime<\/code>\u503c\u6700\u5c0f\u7684\u4efb\u52a1\u6765\u8c03\u5ea6\uff0c\u56e0\u6b64\u9700\u8981\u5b83\u6709\u4e2a<span class=\"mod-overview__keyword\">\u6570\u636e\u7ed3\u6784<\/span>\u6765\u5b58\u50a8\u5404\u4e2a\u4efb\u52a1\u53ca\u5176<code>vruntime<\/code>\u4fe1\u606f\u3002<\/p>\n<p>\u6700\u76f4\u89c2\u7684\u5f53\u7136\u5c31\u662f\u9009\u53d6\u4e00\u4e2a\u6709\u5e8f\u5217\u8868\u6765\u5b58\u50a8\u8fd9\u4e9b\u4fe1\u606f\uff0c\u5217\u8868\u6309\u7167<code>vruntime<\/code>\u6392\u5e8f\u3002\u8fd9\u6837\u5728\u5207\u6362\u4efb\u52a1\u65f6\uff0cCFS\u53ea\u9700\u83b7\u53d6\u5217\u8868\u5934\u7684\u4efb\u52a1\u5373\u53ef\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u3002\u6bd4\u5982\u5f53\u524d\u670910\u4e2a\u4efb\u52a1\uff0c<code>vruntime<\/code>\u4fdd\u5b58\u4e3a\u6709\u5e8f\u94fe\u8868[1, 5, 9, 10, 14, 18, 17, 21, 22, 24]\uff0c\u4f46\u662f\u6bcf\u6b21\u63d2\u5165\u6216\u5220\u9664\u4efb\u52a1\u65f6\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4f1a\u662fO(N)\uff0c\u800c\u4e14\u8017\u65f6\u968f\u7740\u4efb\u52a1\u6570\u7684\u589e\u591a\u800c\u7ebf\u6027\u589e\u957f\uff01<\/p>\n<p>\u4e3a\u4e86\u517c\u987e\u67e5\u8be2\u3001\u63d2\u5165\u3001\u5220\u9664\u7684\u6548\u7387\uff0cCFS\u4f7f\u7528\u7ea2\u9ed1\u6811\u6765\u4fdd\u5b58\u4efb\u52a1\u548c<code>vruntime<\/code>\u4fe1\u606f\uff0c\u8fd9\u6837\uff0c\u67e5\u8be2\u3001\u63d2\u5165\u3001\u5220\u9664\u64cd\u4f5c\u7684\u590d\u6742\u5ea6\u53d8\u6210\u4e86log(N)\uff0c\u5e76\u4e0d\u4f1a\u968f\u7740\u4efb\u52a1\u6570\u7684\u589e\u591a\u800c\u7ebf\u6027\u589e\u957f\uff0c\u6781\u5927\u63d0\u5347\u4e86\u6548\u7387\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8211\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br-1024x566.jpeg\" alt=\"\" width=\"625\" height=\"345\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br-1024x566.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br-300x166.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br-768x424.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br-1536x849.jpeg 1536w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br-624x345.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-br.jpeg 1542w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u53e6\u5916\uff0c\u4e3a\u4e86\u63d0\u5347\u5b58\u50a8\u6548\u7387\uff0cCFS\u5728\u7ea2\u9ed1\u6811\u4e2d\u53ea\u4fdd\u5b58\u4e86\u5904\u4e8eRunning\u72b6\u6001\u7684\u4efb\u52a1\u7684\u4fe1\u606f\u3002<\/p>\n<h5 id=\"a15pa\"><strong>7.4 \u5e94\u5bf9I\/O\u4e0e\u4f11\u7720<\/strong><\/h5>\n<p>\u6bcf\u6b21\u90fd\u9009\u53d6<code>vruntime<\/code>\u503c\u6700\u5c0f\u7684\u4efb\u52a1\u6765\u8c03\u5ea6\u8fd9\u79cd\u7b56\u7565\uff0c\u4e5f\u4f1a\u5b58\u5728\u4efb\u52a1\u997f\u6b7b\u7684\u95ee\u9898\u3002\u8003\u8651\u6709A\u548cB\u4e24\u4e2a\u4efb\u52a1\uff0c\u65f6\u95f4\u7247\u4e3a1s\uff0c\u8d77\u521dA\u548cB\u5747\u5206CPU\u8f6e\u6d41\u8fd0\u884c\uff0c\u5728\u67d0\u6b21\u8c03\u5ea6\u540e\uff0cB\u8fdb\u5165\u4e86\u4f11\u7720\uff0c\u5047\u8bbe\u4f11\u7720\u4e8610s\u3002\u7b49B\u9192\u6765\u540e\uff0cvruntime_{B}\u5c31\u4f1a\u6bd4vruntime_{A}\u5c0f10s\uff0c\u5728\u63a5\u4e0b\u6765\u768410s\u4e2d\uff0cB\u5c06\u4f1a\u4e00\u76f4\u88ab\u8c03\u5ea6\uff0c\u4ece\u800c\u4efb\u52a1A\u51fa\u73b0\u4e86\u997f\u6b7b\u73b0\u8c61\u3002<\/p>\n<p><a href=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-sleep.jpeg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-8210\" src=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-sleep-1024x728.jpeg\" alt=\"\" width=\"625\" height=\"444\" srcset=\"https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-sleep-1024x728.jpeg 1024w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-sleep-300x213.jpeg 300w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-sleep-768x546.jpeg 768w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-sleep-624x444.jpeg 624w, https:\/\/yanjingang.com\/blog\/wp-content\/uploads\/2024\/01\/cpu-cfs-sleep.jpeg 1370w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8be5\u95ee\u9898\uff0cCFS\u89c4\u5b9a\u5f53\u4efb\u52a1\u4ece\u4f11\u7720\u6216I\/O\u4e2d\u8fd4\u56de\u65f6\uff0c\u8be5\u4efb\u52a1\u7684<code>vruntime<\/code>\u4f1a\u88ab\u8bbe\u7f6e\u4e3a\u5f53\u524d\u7ea2\u9ed1\u6811\u4e2d\u7684\u6700\u5c0f<code>vruntime<\/code>\u503c\u3002\u4e0a\u8ff0\u4f8b\u5b50\uff0cB\u4ece\u4f11\u7720\u4e2d\u9192\u6765\u540e\uff0cvruntime_{B}\u4f1a\u88ab\u8bbe\u7f6e\u4e3a11\uff0c\u56e0\u6b64\u4e5f\u5c31\u4e0d\u4f1a\u997f\u6b7b\u4efb\u52a1A\u4e86\u3002<\/p>\n<blockquote><p>\u8fd9\u79cd\u505a\u6cd5\u5176\u5b9e\u4e5f\u5b58\u5728\u7455\u75b5\uff0c\u5982\u679c\u4efb\u52a1\u7684\u4f11\u7720\u65f6\u95f4\u5f88\u77ed\uff0c\u90a3\u4e48\u5b83\u9192\u6765\u540e\u4f9d\u65e7\u662f\u4f18\u5148\u8c03\u5ea6\uff0c\u8fd9\u5bf9\u4e8e\u5176\u4ed6\u4efb\u52a1\u6765\u8bf4\u662f\u4e0d\u516c\u5e73\u7684\u3002<\/p><\/blockquote>\n<h1 id=\"2le2t\">\u4e09\u3001\u603b\u7ed3<\/h1>\n<p>\u672c\u6587\u82b1\u4e86\u5f88\u957f\u7684\u7bc7\u5e45\u8bb2\u89e3\u4e86\u51e0\u79cd\u5e38\u89c1CPU\u8c03\u5ea6\u7b97\u6cd5\u7684\u539f\u7406\uff0c\u6bcf\u79cd\u7b97\u6cd5\u90fd\u6709\u5404\u81ea\u7684\u4f18\u7f3a\u70b9\uff0c\u5e76\u4e0d\u5b58\u5728\u4e00\u79cd\u5b8c\u7f8e\u7684\u8c03\u5ea6\u7b56\u7565\u3002\u5728\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u5b9e\u9645\u7684\u5de5\u4f5c\u8d1f\u8f7d\uff0c\u9009\u53d6\u5408\u9002\u7684\u8c03\u5ea6\u7b97\u6cd5\uff0c\u914d\u7f6e\u5408\u7406\u7684\u8c03\u5ea6\u53c2\u6570\uff0c\u6743\u8861\u5468\u8f6c\u65f6\u95f4\u548c\u54cd\u5e94\u65f6\u95f4\u3001\u4efb\u52a1\u516c\u5e73\u548c\u5207\u6362\u6d88\u8017\u3002\u8fd9\u4e9b\u90fd\u5e94\u9a8c\u4e86\u300aFundamentals of Software Architecture\u300b\u4e2d\u7684\u90a3\u53e5\u540d\u8a00\uff1a<strong>Everything in software architecture is a trade-off<\/strong>.<\/p>\n<p>\u672c\u6587\u4e2d\u63cf\u8ff0\u7684\u8c03\u5ea6\u7b97\u6cd5\u90fd\u662f\u57fa\u4e8e\u5355\u6838\u5904\u7406\u5668\u8fdb\u884c\u5206\u6790\u7684\uff0c\u800c\u591a\u6838\u5904\u7406\u5668\u4e0a\u7684\u8c03\u5ea6\u7b97\u6cd5\u8981\u6bd4\u8fd9\u590d\u6742\u5f88\u591a\uff0c\u6bd4\u5982\u9700\u8981\u8003\u8651\u5904\u7406\u5668\u4e4b\u95f4<strong>\u5171\u4eab<\/strong><span class=\"mod-overview__keyword\"><strong>\u6570\u636e\u540c\u6b65<\/strong><\/span>\u3001<strong>\u7f13\u5b58\u4eb2\u548c\u6027<\/strong>\u7b49\uff0c\u4f46\u672c\u8d28\u539f\u7406\u4f9d\u7136\u79bb\u4e0d\u5f00\u672c\u6587\u6240\u63cf\u8ff0\u7684\u51e0\u79cd\u57fa\u7840\u8c03\u5ea6\u7b97\u6cd5\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u53c2\u8003\uff1a<\/p>\n<p><a class=\"\" href=\"https:\/\/cloud.tencent.com\/developer\/tools\/blog-entry?target=https%3A%2F%2Fbook.douban.com%2Fsubject%2F34994608%2F&amp;source=article&amp;objectId=1947909\" target=\"_blank\" rel=\"nofollow noopener\">Operating Systems: Three Easy Pieces<\/a>, Remzi H Arpaci-Dusseau \/ Andrea C Arpaci-Dusseau<\/p>\n<p><a class=\"\" href=\"https:\/\/cloud.tencent.com\/developer\/tools\/blog-entry?target=https%3A%2F%2Fwww.icourse163.org%2Fcourse%2FNJU-1002532004&amp;source=article&amp;objectId=1947909\" target=\"_blank\" rel=\"nofollow noopener\">\u8ba1\u7b97\u673a\u7cfb\u7edf\u57fa\u7840(\u4e09)\uff1a\u5f02\u5e38\u3001\u4e2d\u65ad\u548c\u8f93\u5165\/\u8f93\u51fa<\/a>, \u8881\u6625\u98ce \u5357\u4eac\u5927\u5b66<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8f6f\u4ef6\u5de5\u7a0b\u5e08\u4eec\u603b\u4e60\u60ef\u628aOS\uff08Operating System\uff0c\u64cd\u4f5c\u7cfb\u7edf\uff09\u5f53\u6210\u662f\u4e00\u4e2a\u975e\u5e38\u503c\u5f97\u4fe1\u8d56\u7684\u7ba1\u5bb6\uff0c\u6211\u4eec\u53ea\u7ba1\u628a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[31,661],"tags":[1338,32,1315],"_links":{"self":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/8200"}],"collection":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8200"}],"version-history":[{"count":3,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/8200\/revisions"}],"predecessor-version":[{"id":8238,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/8200\/revisions\/8238"}],"wp:attachment":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}