{"id":547,"date":"2022-02-09T23:35:01","date_gmt":"2022-02-09T15:35:01","guid":{"rendered":"https:\/\/www.buyao007.icu\/?p=547"},"modified":"2022-02-09T23:35:03","modified_gmt":"2022-02-09T15:35:03","slug":"22-linux%e7%9a%84%e7%bd%91%e7%bb%9cio%e6%a8%a1%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/www.buyao007.icu\/?p=547","title":{"rendered":"22.Linux\u7684\u7f51\u7edcIO\u6a21\u578b"},"content":{"rendered":"\n<p>\u5b59\u5bcc\u9633\uff0c \u6c5f\u6e56\u4eba\u79f0\u6ca1\u4eba\u79f0\u3002\u591a\u5e74\u4e92\u8054\u7f51\u8fd0\u7ef4\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u66fe\u8d1f\u8d23\u8fc7\u5b59\u5e03\u65af\u5927\u89c4\u6a21\u96c6\u7fa4\u67b6\u6784\u81ea\u52a8\u5316\u8fd0\u7ef4\u7ba1\u7406\u5de5\u4f5c\u3002\u64c5\u957fWeb\u96c6\u7fa4\u67b6\u6784\u4e0e\u81ea\u52a8\u5316\u8fd0\u7ef4\uff0c\u66fe\u8d1f\u8d23\u56fd\u5185\u67d0\u5927\u578b\u535a\u5ba2\u7f51\u7ad9\u8fd0\u7ef4\u5de5\u4f5c\u3002\u5fae\u4fe1\uff1as2795802440<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc_0\">1.IO\u57fa\u672c\u6982\u8ff0<\/h2>\n\n\n\n<p><strong><em>1.\u4ec0\u4e48\u662fIO<\/em><\/strong><\/p>\n\n\n\n<p>\u6240\u8c13IO\uff0c\u65e0\u975e\u5c31\u662f\u8f93\u5165\u8f93\u51fa\uff0c\u5176\u5b9e\u5927\u5bb6\u66f4\u591a\u5173\u6ce8\u7684\u662f\u78c1\u76d8IO\u3002\u4e8b\u5b9e\u4e0a\u5f53\u6211\u4eec\u5728\u7f51\u7edc\u4e2d\u4f20\u9001\u4e00\u4e9b\u6570\u636e\u65f6\uff0c\u4ed6\u672c\u8d28\u4e0a\u4e5f\u662f\u4e00\u79cdIO\u3002<\/p>\n\n\n\n<p><strong><em>2.\u7f51\u7edc\u4e2d\u7684IO\u662f\u4ec0\u4e48\u6837\uff1f<\/em><\/strong><\/p>\n\n\n\n<p>\u62ff\u7528\u6237\u8bf7\u6c42Nginx\u8fd9\u6837\u7684web\u670d\u52a1\u5668\u83b7\u53d6\u78c1\u76d8\u4e2d\u7684\u6587\u4ef6\u65f6\uff0c\u7cfb\u7edf\u662f\u5982\u4f55\u5904\u7406\u7684\uff1f<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"899\" height=\"316\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/16444146511.png\" alt=\"\" class=\"wp-image-548\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/16444146511.png 899w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/16444146511-300x105.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/16444146511-768x270.png 768w\" sizes=\"(max-width: 899px) 100vw, 899px\" 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id=\"toc_0\">2.IO\u7f51\u7edc\u6a21\u578b<\/h2>\n\n\n\n<p><strong><em>1.IO\u6a21\u578b\u5206\u4e3a\u3001\u540c\u6b65\u3001\u5f02\u6b65\u3001\u963b\u585e\u3001\u975e\u963b\u585e<\/em><\/strong><\/p>\n\n\n\n<p>\u540c\u6b65\/\u5f02\u6b65\uff08\u5173\u6ce8\u7684\u662f\u6d88\u606f\u901a\u77e5\u673a\u5236)<\/p>\n\n\n\n<p>\u540c\u6b65\u2236\u8c03\u7528\u8005\u53d1\u6307\u5b9a\u7ed9\u88ab\u8c03\u7528\u8005\uff0c\u88ab\u8c03\u7528\u8005\u9700\u8981\u83b7\u53d6\u4e00\u4e9b\u8d44\u6e90\u540e\u5728\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\uff0c\u90a3\u4e48\u6b64\u65f6\u8c03\u7528\u8005\u9700\u8981\u7b49\u5f85\u88ab\u8c03\u7528\u8005\u8fd4\u56de\u6d88\u606f\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u8c03\u7528\u8005\u5565\u4e5f\u5e72\u4e0d\u4e86\u3002(\u4e3e\u4f8b:\u5f53\u6211\u4eec\u5c06\u8863\u670d\u6254\u8fdb\u6d17\u8863\u670d\uff0c\u90a3\u4e48\u8863\u670d\u6d17\u5b8c\u6ca1\u6d17\u5b8c\u4e5f\u4e0d\u77e5\u9053\uff0c\u90a3\u5c31\u9700\u8981\u8fc7\u4e00\u6bb5\u65f6\u95f4\u53bb\u770b\u4e00\u4e0b\uff0c\u5bf9\u4e8e\u8c03\u7528\u8005\u6765\u8bf4\u5f88\u7e41\u5fd9\u3002)<br>\u5f02\u6b65\ufe30\u8c03\u7528\u8005\u53d1\u6307\u5b9a\u7ed9\u88ab\u8c03\u7528\u8005\uff0c\u88ab\u8c03\u7528\u8005\u9700\u8981\u83b7\u53d6\u4e00\u4e9b\u8d44\u6e90\u540e\u5728\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\uff0c\u6b64\u65f6\"\u201d\u88ab\u8c03\u7528\u8005\"\u4f1a\u4e3b\u52a8\u5c06\u5f53\u524d\u7684\u8fd0\u884c\u72b6\u6001\u901a\u77e5\u7ed9\u8c03\u7528\u8005\u3002(\u4e3e\u4f8b:\u5f53\u6211\u4eec\u5c06\u8863\u670d\u6254\u8fdb\u6d17\u8863\u673a\uff0c\u5f53\u6d17\u8863\u673a\u5b8c\u6210\u6d17\u8863\u670d\u4e4b\u524d\u6211\u4eec\u53ef\u4ee5\u505a\u70b9\u522b\u7684\u4e8b\u60c5\uff0c\u7b49\u6d17\u5b8c\u540e\u6d17\u8863\u673a\u4f1a\u901a\u77e5\uff0c\u6b64\u65f6\u6211\u5728\u53bb\u667e\u8863\u670d\u3002)<\/p>\n\n\n\n<p>\u963b\u585e\/\u975e\u963b\u585e\uff08\u5173\u6ce8\u7684\u662f\u201c\u8c03\u7528\u8005\"\u5728\u7b49\u5f85\"\u88ab\u8c03\u7528\u8005\"\u8fd4\u56de\u7ed3\u679c\u4e4b\u524d\u6240\u5904\u7684\u72b6\u6001)<\/p>\n\n\n\n<p>\u963b\u585e\u2236\u6307I\u041e\u64cd\u4f5c\u9700\u8981\u5f7b\u5e95\u5b8c\u6210\u540e\u624d\u8fd4\u56de\u5230\u7528\u6237\u7a7a\u95f4\uff0c\u8c03\u7528\u7ed3\u679c\u8fd4\u56de\u4e4b\u524d\uff0c\u8c03\u7528\u8005\u88ab\u6302\u8d77\u3002(\u4e3e\u4f8b\ufe30\u5c06\u8863\u670d\u4ecd\u7ed9\u6d17\u8863\u673a\uff0c\u7136\u540e\u4eba\u4e00\u76f4\u5728\u65c1\u8fb9\u7b49\u7740\uff0c\u4ec0\u4e48\u65f6\u5019\u6d17\u5b8c\u4ec0\u4e48\u65f6\u5019\u6267\u884c\u4e0b\u4e00\u6b65\u52a8\u4f5c\u3002)<br>\u975e\u963b\u585e\ufe30\u6307I\u041e\u64cd\u4f5c\u88ab\u8c03\u7528\u540e\u7acb\u5373\u8fd4\u56de\u7ed9\u7528\u6237\u8fdb\u7a0b\u4e00\u4e2a\u72b6\u6001\u503c\uff0c\u65e0\u9700\u7b49\u5f85l\u041e\u64cd\u4f5c\u5f7b\u5e95\u5b8c\u6210\uff0c\u5728\u6700\u7ec8\u7684\u8c03\u7528\u7ed3\u679c\u8fd4\u56de\u4e4b\u524d\uff0c\u8c03\u7528\u8005\u4e0d\u4f1a\u88ab\u6302\u8d77\u3002(\u4e3e\u4f8b\ufe30\u5c06\u8863\u670d\u4ecd\u7ed9\u6d17\u8863\u673a\uff0c\u7136\u540e\u53ef\u4ee5\u53bb\u5e72\u5176\u4ed6\u7684\u4e8b\u60c5\uff0c\u7b49\u6d17\u5b8c\u540e\uff0c\u5728\u53bb\u5904\u7406\u3002)<\/p>\n\n\n\n<p><strong><em>2.IO\u6a21\u578b\u7ec4\u5408\u8d77\u6765\u53c8\u6709\u5f88\u591a\u79cd\u60c5\u51b5<\/em><\/strong><\/p>\n\n\n\n<p>\u540c\u6b65\u963b\u585e\ufe30\u5c06\u8863\u670d\u4ecd\u5230\u6d17\u8863\u673a\uff0c\u7136\u540e\u5b88\u5728\u6d17\u8863\u673a\u65c1\u8fb9\uff0c\u7b49\u5f85\u4ed6\u4ec0\u4e48\u65f6\u5019\u6d17\u5b8c\u4ec0\u4e48\u65f6\u5019\u5904\u7406\u3002<br>\u540c\u6b65\u975e\u963b\u585e\ufe30\u5c06\u8863\u670d\u4ecd\u5230\u6d17\u8863\u673a\uff0c\u7136\u540e\u53ef\u4ee5\u53bb\u5e72\u522b\u7684\u4e8b\u60c5\uff0c\u90a3\u662f\u5426\u6d17\u5b8c\u4e0d\u77e5\u9053\uff0c\u5c31\u9700\u8981\u65f6\u4e0d\u65f6\u770b\u4e00\u4e0b\u3002\u5f02\u6b65\u963b\u585e:\u5c06\u8863\u670d\u4ecd\u7ed9\u6d17\u8863\u673a\uff0c\u8fd8\u662f\u4f1a\u5728\u65c1\u8fb9\u7b49\u7740(\u963b\u585e)\uff0c\u6d17\u8863\u673a\u6d17\u5b8c\u4e86\u4f1a\u901a\u77e5\u3002<br>\u5f02\u6b65\u975e\u963b\u585e\u2236\u5c06\u8863\u670d\u4ecd\u7ed9\u6d17\u8863\u673a\uff0c\u53ef\u4ee5\u53bb\u5e72\u5176\u4ed6\u4e8b\u60c5\uff0c\u7b49\u5f85\u6d17\u8863\u673a\u6d17\u5b8c\u4e86\u4f1a\u901a\u77e5\uff0c\u7136\u540e\u5728\u53bb\u53d6\u8863\u670d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc_0\">3.\u4e94\u79cd\u5e38\u89c1\u7684IO\u7f51\u7edc\u6a21\u578b<\/h2>\n\n\n\n<p><strong><em>3.1\u540c\u6b65\u963b\u585e<\/em><\/strong><\/p>\n\n\n\n<p>1.\u5f53\u7528\u6237\u8fdb\u7a0b\u8c03\u7528\u4e86recvfrom()\u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\uff0c\u5e0c\u671b\u4ece\u78c1\u76d8\u83b7\u53d6\u6570\u636e<br>2.kernel\u5c31\u5f00\u59cb\u4e86IO\u7684\u7b2c\u4e00\u4e2a\u9636\u6bb5\uff0c\u51c6\u5907\u6570\u636e\uff0c\u5982\u679c\u6570\u636e\u9700\u8981\u5f88\u957f\u65f6\u95f4\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u4e00\u76f4\u7b49\u5f85\u3002<br>3.\u5f53kernel\u6570\u636e\u51c6\u5907\u597d\u4e86\uff0c\u4f1a\u5c06\u6570\u636e\u4ecekernel\u4e2d\u62f7\u8d1d\u5230\u7528\u6237\u8fdb\u7a0b\u5185\u5b58\uff0c\u7136\u540ekernel\u8fd4\u56de\u6570\u636e\u7ed3\u679c\uff0c\u7528\u6237\u8fdb\u7a0b\u624d\u89e3\u9664\u963b\u585e\u72b6\u6001\uff0c\u53ef\u4ee5\u505a\u5176\u4ed6\u4e8b\u60c5\u3002<br>\u603b\u7ed3\uff0c\u540c\u6b65\u963b\u585eIO\u7684\u7279\u70b9\u5c31\u662f\u5728IO\u6267\u884c\u7684\u4e24\u4e2a\u9636\u6bb5\u90fd\u88ab\u963b\u585e\u4e86\u3002\u90a3\u4e48\u4e5f\u5c31\u610f\u5473\u7740\u4e00\u4e2a\u8fdb\u7a0b\u53ea\u80fd\u54cd\u5e94\u4e00\u4e2a\u7528\u6237\u8bf7\u6c42\uff0c\u5269\u4e0b\u8bf7\u6c42\u4f1a\u88ab\u6302\u8d77\uff0c\u4f1a\u9020\u6210\u6bcf\u6b21\u53ea\u80fd\u54cd\u5e94\u4e00\u4e2a\u8bf7\u6c42\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"996\" height=\"431\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-1.png\" alt=\"\" class=\"wp-image-549\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-1.png 996w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-1-300x130.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-1-768x332.png 768w\" sizes=\"(max-width: 996px) 100vw, 996px\" \/><figcaption>\u963b\u585e\u5f0fIO\u6a21\u578b<\/figcaption><\/figure>\n\n\n\n<p><strong><em>3.2\u540c\u6b65\u975e\u963b\u585eIO<\/em><\/strong><\/p>\n\n\n\n<p>1.\u5f53\u7528\u6237\u8fdb\u7a0b\u8c03\u7528\u4e86recvfrom()\u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\uff0c\u5e0c\u671b\u4ece\u78c1\u76d8\u83b7\u53d6\u6570\u636e\u3002<br>2.\u90a3\u4e48\u662f\u5426\u5b8c\u6210\u5e76\u4e0d\u77e5\u9053\uff0c\u9700\u8981\u4e00\u6b21\u4e00\u6b21\u7684\u53bb\u95ee\u3002<br>3.\u5f53kernel \u4e2d\u7684\u6570\u636e\u51c6\u5907\u597d\u4e86\uff0c\u6b64\u65f6\u7528\u6237\u8fdb\u7a0b\u518d\u6b21\u53d1\u8d77\u7cfb\u7edf\u8c03\u7528\uff0c\u90a3\u4e48\u5b83\u9a6c\u4e0a\u5c31\u5c06\u6570\u636e\u62f7\u8d1d\u5230\u4e86\u7528\u6237\u8fdb\u7a0b\u5185\u5b58\u3002\u6240\u4ee5\uff0c\u975e\u963b\u585elO\u7684\u7279\u70b9\u662f\u7528\u6237\u8fdb\u7a0b\u9700\u8981\u4e0d\u65ad\u7684\u4e3b\u52a8\u8be2\u95eekernel\u6570\u636e\u597d\u4e86\u6ca1\u6709\u3002\u597d\u5904\ufe30\u7528\u6237\u8fdb\u7a0b\u53ef\u4ee5\u5904\u7406\u5176\u4ed6\u4efb\u52a1\uff0c\u574f\u5904\ufe30\u4efb\u52a1\u5b8c\u6210\u7684\u54cd\u5e94\u5ef6\u8fdf\u589e\u5927\u4e86\uff0c\u56e0\u4e3a\u6bcf\u8fc7\u4e00\u6bb5\u65f6\u95f4\u624d\u53bb\u8f6e\u8be2\u4e00\u6b21read\u64cd\u4f5c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"984\" height=\"441\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-2.png\" alt=\"\" class=\"wp-image-550\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-2.png 984w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-2-300x134.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-2-768x344.png 768w\" sizes=\"(max-width: 984px) 100vw, 984px\" \/><figcaption>\u975e\u963b\u585e\u5f0fIO<\/figcaption><\/figure>\n\n\n\n<p><strong><em>3.3IO\u591a\u8def\u590d\u7528<\/em><\/strong><\/p>\n\n\n\n<p>1.\u5f53\u7528\u6237\u8fdb\u7a0b\u53d1\u8d77\u8c03\u7528\u8bf7\u6c42\uff0c\u4e0d\u7528\u76f4\u63a5\u4e0e\u5185\u6838\u4ea4\u4e92\uff0c\u800c\u662f\u627e\u4e00\u4e2a\u5e94\u7528\u4ee3\u7406\u8fdb\u7a0bselect\uff0c\u5f53\u7528\u6237\u8fdb\u7a0b\u8c03\u7528\u4e86select,\u90a3\u4e48\u6574\u4e2a\u8fdb\u7a0b\u4f1a\u963b\u585e\u5728select\u4e0a(\u56e0\u4e3a\u662f\u7531select\u4e0e\u5185\u6838\u8fdb\u884c\u4ea4\u4e92\uff0c\u9700\u8981\u7b49\u5f85select\u8fd4\u56de\u7ed3\u679c)\u3002<br>2.kernel\u4f1a\u201c\u76d1\u89c6\"select\u8d1f\u8d23\u7684\u6570\u636e\uff0c\u5f53\u4efb\u4f55\u4e00\u4e2a\u8fdb\u7a0b\u7684\u6570\u636e\u51c6\u5907\u597d\u4e86\uff0cselect\u5c31\u4f1a\u8fd4\u56de\u3002<br>3.\u5f53select\u7528\u6237\u8fdb\u7a0b\u8fd4\u56de\u7ed3\u679c\u540e\uff0c\u7528\u6237\u7a0b\u5e8f\u4f1a\u518d\u6b21\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\uff0c\u5c06kernel\u6570\u636e\u62f7\u8d1d\u5230\u7528\u6237\u8fdb\u7a0b\u3002\u603b\u7ed3\uff0cselect\u4ee3\u7406\u8fdb\u7a0b\uff0c\u5b83\u8fd9\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u4ee5\u63a5\u6536\u591a\u4e2a\u7528\u6237\u8fdb\u7a0b\u7684\u8bf7\u6c42\u3002(\u50cf\u529e\u7b7e\u8bc1\u4e00\u6837)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"953\" height=\"424\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-3.png\" alt=\"\" class=\"wp-image-551\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-3.png 953w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-3-300x133.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-3-768x342.png 768w\" sizes=\"(max-width: 953px) 100vw, 953px\" \/><figcaption>IO\u590d\u7528\u6a21\u578b<\/figcaption><\/figure>\n\n\n\n<p><strong><em>3.4\u4fe1\u53f7\u9a71\u52a8IO<\/em><\/strong><\/p>\n\n\n\n<p>1.\u5f53\u7528\u6237\u8fdb\u7a0b\u8c03\u7528\u4e86recvfrom)\u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\uff0c\u5e0c\u671b\u4ece\u78c1\u76d8\u83b7\u53d6\u6570\u636e\u3002<br>\u2489\u78c1\u76d8\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u5982\u679c\u8fd8\u6ca1\u6709\u8bfb\u53d6\u5230\u5185\u6838\u65f6\uff0c\u6ca1\u5173\u7cfb\uff0c\u8fdb\u7a0b\u8fd8\u53ef\u4ee5\u7ee7\u7eed\u8fd0\u884c\u5e76\u4e0d\u963b\u585e\u3002<br>3.\u5f53\u78c1\u76d8\u6570\u636e\u590d\u5236\u5230\u5185\u6838\u4e2d\u540e\uff0c\u4f1a\u901a\u77e5\u7528\u6237\u8fdb\u7a0b\u6570\u636e\u51c6\u5907\u5c31\u7eea\u3002<br>4.\u7528\u6237\u8fdb\u7a0b\u5728\u53d1\u6307\u5b9a\u5c06\u5185\u6838\u4e2d\u6570\u636e\u590d\u5236\u5230\u7528\u6237\u8fdb\u7a0b\u4e2d\uff0c\u6b64\u65f6\u8fdb\u7a0b\u4f1a\u8fdb\u5165\u963b\u585e\u72b6\u6001\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"965\" height=\"473\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-4.png\" alt=\"\" class=\"wp-image-552\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-4.png 965w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-4-300x147.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-4-768x376.png 768w\" sizes=\"(max-width: 965px) 100vw, 965px\" \/><figcaption>\u4fe1\u53f7\u9a71\u52a8IO\u6a21\u578b<\/figcaption><\/figure>\n\n\n\n<p><strong><em>3.5\u5f02\u6b65\u975e\u963b\u585eIO<\/em><\/strong><\/p>\n\n\n\n<p>1.\u5f53\u7528\u6237\u8fdb\u7a0b\u8c03\u7528\u4e86recvfrom()\u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\uff0c\u5e0c\u671b\u4ece\u78c1\u76d8\u83b7\u53d6\u6570\u636e\u3002<br>2.kernel\u6536\u5230\u540e\uff0c\u4f1a\u7acb\u523b\u8fd4\u56de\uff0c\u6240\u4ee5\u4e0d\u4f1a\u5bf9\u7528\u6237\u8fdb\u7a0b\u4ea7\u751f\u4efb\u4f55\u963b\u585e\u3002<br>3.kernel\u7b49\u5f85\u6570\u636e\u51c6\u5907\u5b8c\u6210\uff0c\u5e76\u5c06\u5185\u6838\u6570\u636e\u62f7\u8d1d\u5230\u7528\u6237\u8fdb\u7a0b\u5185\u5b58\uff0c\u5f53\u8fd9\u4e00\u5207\u90fd\u5b8c\u6210\u4e4b\u540e\uff0ckernel\u4f1a\u7ed9\u7528\u6237\u8fdb\u7a0b\u53d1\u9001\u2014\u4e2a\u56de\u8c03\u51fd\u6570\u901a\u77e5\u7528\u6237\u8fdb\u7a0b\u672c\u6b21IO\u5b8c\u6210\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"969\" height=\"488\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-5.png\" alt=\"\" class=\"wp-image-553\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-5.png 969w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-5-300x151.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-5-768x387.png 768w\" sizes=\"(max-width: 969px) 100vw, 969px\" \/><figcaption>\u5f02\u6b65IO\u6a21\u578b<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc_0\">4.IO\u6a21\u578b\u7684\u5b9e\u73b0<\/h2>\n\n\n\n<p><strong><em>1.IO\u6a21\u578b\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u7531\u4ee5\u4e0b\u51e0\u79cd:<\/em><\/strong><\/p>\n\n\n\n<p>Select : Linux\u5b9e\u73b0\u5bf9\u5e94\uff0cIO\/\u590d\u7528\u6a21\u578b\uff0cBSD4.2\u6700\u65e9\u5b9e\u73b0<br>Poll: Linux\u5b9e\u73b0\uff0c\u5bf9\u5e94IO\u590d\u7528\u6a21\u578b\uff0cSystem V unix\u6700\u65e9\u5b9e\u73b0<br>Epoll : Linux\u5b9e\u73b0\uff0c\u5bf9\u5e94IO\u590d\u7528\u6a21\u578b\uff0c\u5177\u6709\u4fe1\u53f7\u9a71\u52a8I\/O\u6a21\u578b\u67d0\u4e9b\u7279\u6027<\/p>\n\n\n\n<p><strong><em>2.select\u3001poll\u3001epoll\u533a\u522b?<\/em><\/strong><\/p>\n\n\n\n<p>\u65e0\u8bba\u662fselect\u3001poll\u3001epoll\u90fd\u53ef\u4ee5\u9762\u5bf9\u591a\u4e2a\u7528\u6237\u8fdb\u7a0b\u7684\u8bf7\u6c42\uff0c\u5b83\u76f8\u5f53\u4e8e\u4e00\u4e2a\u4ee3\u7406\u4eba\uff0c\u6536\u96c6\u5f88\u591a\u7528\u6237\u8fdb\u7a0b\u7684\u8bf7\u6c42\uff0c\u6536\u96c6\u5b8c\u6210\u540e\uff0c\u5b83\u5e2e\u4f60\u4ece\u78c1\u76d8\u4e0a\u83b7\u53d6\u6570\u636e\uff0c\u590d\u5236\u5230\u5185\u6838\u4e2d\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6570\u636e\u51c6\u5907\u6ca1\u51c6\u5907\u597d\uff0c\u5b83\u7684\u5b9e\u73b0\u673a\u5236\u662f\u4e0d\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"887\" height=\"440\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-6.png\" alt=\"\" class=\"wp-image-554\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-6.png 887w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-6-300x149.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-6-768x381.png 768w\" sizes=\"(max-width: 887px) 100vw, 887px\" \/><\/figure>\n\n\n\n<p>\u901a\u77e5\u65b9\u5f0f\u2236\u5047\u8bbe\u6709\u4e00\u4e2a\u7528\u6237\u6570\u636e\u51c6\u5907\u597d\u4e86\uff0c\u90a3\u4e48\u8fd8\u6709\u5f88\u591a\u7528\u6237\u6570\u636e\u6ca1\u51c6\u5907\u597d\uff0c\u90a3\u4e48\u5982\u4f55\u901a\u77e5\u5462?<br>select\u548cpoll\u662f\u904d\u5386\u626b\u63cf\uff0c\u6548\u7387\u4f4e\u4e0b\u3002<br>epoll\u91c7\u7528\u56de\u8c03\u673a\u5236, epoll\u4f1a\u4e3b\u52a8\u901a\u77e5\uff0c\u6548\u7387\u4f1a\u66f4\u9ad8\u3002<br>lO\u6548\u7387:\u5047\u8bbe100\u4e2a\u7528\u6237\u53d1\u8bf7\u6c42\u548c1000\u4e2a\u7528\u6237\u53d1\u8bf7\u6c42\uff0c\u5728\u904d\u5386\u7684\u65f6\u5019\u7684\u6027\u80fd\u4e00\u6837\u5417?<br>select\u548cpoll\u7528\u6237\u7684\u8bf7\u6c42\u8d8a\u591a\uff0c\u6240\u9700\u8981\u904d\u5386\u7684\u5c31\u8d8a\u591a\uff0c\u9700\u8981\u8017\u65f6\u5c31\u8d8a\u957f\u3002<br>epool\u91c7\u7528\u7684\u662f\u56de\u8c03\u65b9\u5f0f\uff0c\u65e0\u8bba\u6709\u591a\u5c11\u7528\u6237\uff0c\u5b83\u53d1\u9001\u7684\u65f6\u95f4\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-7.png\" alt=\"\" class=\"wp-image-555\" width=\"627\" height=\"375\" srcset=\"https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-7.png 883w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-7-300x179.png 300w, https:\/\/www.buyao007.icu\/wp-content\/uploads\/2022\/02\/image-7-768x459.png 768w\" sizes=\"(max-width: 627px) 100vw, 627px\" \/><\/figure>\n\n\n\n<p>\u90a3\u4e48nginx\u4ece\u6700\u521d\u8bbe\u8ba1\u65f6\uff0c\u5c31\u662f\u4f7f\u7528\u7684\u4e8b\u4ef6\u9a71\u52a8\u5f0fIO\uff0c\u4f7f\u7528\u8fb9\u7f18\u89e6\u53d1\u673a\u5236\u3002\u540c\u65f6nginx\u8fd8\u652f\u6301\u5f02\u6b65O\uff0c\u7528\u4e86\u8fd1\u51e0\u5e74\u6700\u65b0\u7684\u670d\u52a1\u7aef\u7f16\u7a0b\u6280\u672f\uff0c\u6765\u652f\u6301\u8f83\u597d\u7684\u5e76\u53d1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b59\u5bcc\u9633\uff0c \u6c5f\u6e56\u4eba\u79f0\u6ca1\u4eba\u79f0\u3002\u591a\u5e74\u4e92\u8054\u7f51\u8fd0\u7ef4\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u66fe\u8d1f\u8d23\u8fc7\u5b59\u5e03\u65af\u5927\u89c4\u6a21\u96c6\u7fa4\u67b6\u6784\u81ea\u52a8\u5316\u8fd0\u7ef4\u7ba1\u7406\u5de5\u4f5c\u3002\u64c5\u957fWeb\u96c6 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":246,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/547"}],"collection":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=547"}],"version-history":[{"count":1,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/547\/revisions"}],"predecessor-version":[{"id":556,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/547\/revisions\/556"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/media\/246"}],"wp:attachment":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}