{"id":111,"date":"2014-11-06T15:56:01","date_gmt":"2014-11-06T15:56:01","guid":{"rendered":""},"modified":"2014-11-06T15:56:01","modified_gmt":"2014-11-06T15:56:01","slug":"","status":"publish","type":"post","link":"http:\/\/weizn.net\/?p=111","title":{"rendered":"Linux\u7f51\u7edc\u7f16\u7a0b\u4e4bI\/O\u6a21\u578b"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/weizn.net\/?p=111\/#%E9%98%BB%E5%A1%9EIO%E6%A8%A1%E5%9E%8B%EF%BC%9A\" title=\"\n\t\t\u963b\u585eI\/O\u6a21\u578b\uff1a \n\t\">\n\t\t\u963b\u585eI\/O\u6a21\u578b\uff1a \n\t<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/weizn.net\/?p=111\/#%E9%9D%9E%E9%98%BB%E5%A1%9EIO%E6%A8%A1%E5%9E%8B\" title=\"\n\t\t\u975e\u963b\u585eIO\u6a21\u578b&nbsp; \n\t\">\n\t\t\u975e\u963b\u585eIO\u6a21\u578b&nbsp; \n\t<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/weizn.net\/?p=111\/#IO%E5%A4%8D%E7%94%A8%E6%A8%A1%E5%9E%8B%EF%BC%9A\" title=\"\n\tIO\u590d\u7528\u6a21\u578b\uff1a \n\">\n\tIO\u590d\u7528\u6a21\u578b\uff1a \n<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/weizn.net\/?p=111\/#%E4%BF%A1%E5%8F%B7%E9%A9%B1%E5%8A%A8IO\" title=\"\n\t\u4fe1\u53f7\u9a71\u52a8IO \n\">\n\t\u4fe1\u53f7\u9a71\u52a8IO \n<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/weizn.net\/?p=111\/#%E5%BC%82%E6%AD%A5IO%E6%A8%A1%E5%9E%8B\" title=\"\n\t\u5f02\u6b65IO\u6a21\u578b \n\">\n\t\u5f02\u6b65IO\u6a21\u578b \n<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/weizn.net\/?p=111\/#5%E4%B8%AAIO%E6%A8%A1%E5%9E%8B%E7%9A%84%E6%AF%94%E8%BE%83%EF%BC%9A\" title=\"\n\t5\u4e2aI\/O\u6a21\u578b\u7684\u6bd4\u8f83\uff1a \n\">\n\t5\u4e2aI\/O\u6a21\u578b\u7684\u6bd4\u8f83\uff1a \n<\/a><\/li><\/ul><\/nav><\/div>\n<p>\n\t&nbsp;<span>\u672c\u6587\u8f6c\u81ea\u4f5c\u8005\uff1a<\/span><a href=\"http:\/\/blog.csdn.net\/hguisu?viewmode=list\" target=\"_blank\">huangguisu<\/a>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<h2>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t0\"><\/a><a name=\"t0\"><\/a><\/span><br \/>\n<\/h2>\n<p class=\"headline-1 bk-sidecatalog-title\">\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1. \u6982\u5ff5\u7406\u89e3<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; &nbsp;\u5728\u8fdb\u884c\u7f51\u7edc\u7f16\u7a0b\u65f6\uff0c\u6211\u4eec\u5e38\u5e38\u89c1\u5230\u540c\u6b65(Sync)\/\u5f02\u6b65(Async)\uff0c\u963b\u585e(Block)\/\u975e\u963b\u585e(Unblock)\u56db\u79cd\u8c03\u7528\u65b9\u5f0f\uff1a<br \/>\n<strong>\u540c\u6b65\uff1a<\/strong><br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u6240\u8c13\u540c\u6b65\uff0c\u5c31\u662f\u5728\u53d1\u51fa\u4e00\u4e2a\u529f\u80fd\u8c03\u7528\u65f6\uff0c\u5728\u6ca1\u6709\u5f97\u5230\u7ed3\u679c\u4e4b\u524d\uff0c\u8be5\u8c03\u7528\u5c31\u4e0d\u8fd4\u56de\u3002<strong>\u4e5f\u5c31\u662f\u5fc5\u987b\u4e00\u4ef6\u4e00\u4ef6\u4e8b\u505a<\/strong><span lang=\"EN-US\">,<\/span>\u7b49\u524d\u4e00\u4ef6\u505a\u5b8c\u4e86\u624d\u80fd\u505a\u4e0b\u4e00\u4ef6\u4e8b\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p align=\"left\">\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u4f8b\u5982\u666e\u901aB\/S\u6a21\u5f0f\uff08\u540c\u6b65\uff09\uff1a\u63d0\u4ea4\u8bf7\u6c42-&gt;\u7b49\u5f85\u670d\u52a1\u5668\u5904\u7406-&gt;\u5904\u7406\u5b8c\u6bd5\u8fd4\u56de&nbsp;\u8fd9\u4e2a\u671f\u95f4\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\u4e0d\u80fd\u5e72\u4efb\u4f55\u4e8b<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>\u5f02\u6b65\uff1a<\/strong><br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u5f02\u6b65\u7684\u6982\u5ff5\u548c\u540c\u6b65\u76f8\u5bf9\u3002\u5f53\u4e00\u4e2a\u5f02\u6b65\u8fc7\u7a0b\u8c03\u7528\u53d1\u51fa\u540e\uff0c\u8c03\u7528\u8005\u4e0d\u80fd\u7acb\u523b\u5f97\u5230\u7ed3\u679c\u3002\u5b9e\u9645\u5904\u7406\u8fd9\u4e2a\u8c03\u7528\u7684\u90e8\u4ef6\u5728\u5b8c\u6210\u540e\uff0c\u901a\u8fc7\u72b6\u6001\u3001\u901a\u77e5\u548c\u56de\u8c03\u6765\u901a\u77e5\u8c03\u7528\u8005\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; &nbsp;\u4f8b\u5982 ajax\u8bf7\u6c42\uff08\u5f02\u6b65\uff09<span lang=\"EN-US\">:&nbsp;<\/span>\u8bf7\u6c42\u901a\u8fc7\u4e8b\u4ef6\u89e6\u53d1<span lang=\"EN-US\">-&gt;<\/span>\u670d\u52a1\u5668\u5904\u7406\uff08\u8fd9\u662f\u6d4f\u89c8\u5668\u4ecd\u7136\u53ef\u4ee5\u4f5c\u5176\u4ed6\u4e8b\u60c5\uff09<span lang=\"EN-US\">-&gt;<\/span>\u5904\u7406\u5b8c\u6bd5<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>\u963b\u585e<\/strong><br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u963b\u585e\u8c03\u7528\u662f\u6307\u8c03\u7528\u7ed3\u679c\u8fd4\u56de\u4e4b\u524d\uff0c\u5f53\u524d\u7ebf\u7a0b\u4f1a\u88ab\u6302\u8d77\uff08\u7ebf\u7a0b\u8fdb\u5165\u975e\u53ef\u6267\u884c\u72b6\u6001\uff0c\u5728\u8fd9\u4e2a\u72b6\u6001\u4e0b\uff0ccpu\u4e0d\u4f1a\u7ed9\u7ebf\u7a0b\u5206\u914d\u65f6\u95f4\u7247\uff0c\u5373\u7ebf\u7a0b\u6682\u505c\u8fd0\u884c\uff09\u3002\u51fd\u6570\u53ea\u6709\u5728\u5f97\u5230\u7ed3\u679c\u4e4b\u540e\u624d\u4f1a\u8fd4\u56de\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<br \/>\n &nbsp;<br \/>\n&nbsp;\u6709\u4eba\u4e5f\u8bb8\u4f1a\u628a\u963b\u585e\u8c03\u7528\u548c\u540c\u6b65\u8c03\u7528\u7b49\u540c\u8d77\u6765\uff0c\u5b9e\u9645\u4e0a\u4ed6\u662f\u4e0d\u540c\u7684\u3002\u5bf9\u4e8e\u540c\u6b65\u8c03\u7528\u6765\u8bf4\uff0c\u5f88\u591a\u65f6\u5019\u5f53\u524d\u7ebf\u7a0b\u8fd8\u662f\u6fc0\u6d3b\u7684\uff0c\u53ea\u662f\u4ece\u903b\u8f91\u4e0a\u5f53\u524d\u51fd\u6570\u6ca1\u6709\u8fd4\u56de\u800c\u5df2\u3002&nbsp;\u4f8b<br \/>\n\u5982\uff0c\u6211\u4eec\u5728socket\u4e2d\u8c03\u7528recv\u51fd\u6570\uff0c\u5982\u679c\u7f13\u51b2\u533a\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u8fd9\u4e2a\u51fd\u6570\u5c31\u4f1a\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230\u6709\u6570\u636e\u624d\u8fd4\u56de\u3002\u800c\u6b64\u65f6\uff0c\u5f53\u524d\u7ebf\u7a0b\u8fd8\u4f1a\u7ee7\u7eed\u5904\u7406\u5404\u79cd\u5404\u6837\u7684\u6d88<br \/>\n\u606f\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>\u975e\u963b\u585e<\/strong><br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u975e\u963b\u585e\u548c\u963b\u585e\u7684\u6982\u5ff5\u76f8\u5bf9\u5e94\uff0c\u6307\u5728\u4e0d\u80fd\u7acb\u523b\u5f97\u5230\u7ed3\u679c\u4e4b\u524d\uff0c\u8be5\u51fd\u6570\u4e0d\u4f1a\u963b\u585e\u5f53\u524d\u7ebf\u7a0b\uff0c\u800c\u4f1a\u7acb\u523b\u8fd4\u56de\u3002<br \/>\n\u5bf9\u8c61\u7684\u963b\u585e\u6a21\u5f0f\u548c\u963b\u585e\u51fd\u6570\u8c03\u7528<br \/>\n\u5bf9<br \/>\n\u8c61\u662f\u5426\u5904\u4e8e\u963b\u585e\u6a21\u5f0f\u548c\u51fd\u6570\u662f\u4e0d\u662f\u963b\u585e\u8c03\u7528\u6709\u5f88\u5f3a\u7684\u76f8\u5173\u6027\uff0c\u4f46\u662f\u5e76\u4e0d\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\u3002\u963b\u585e\u5bf9\u8c61\u4e0a\u53ef\u4ee5\u6709\u975e\u963b\u585e\u7684\u8c03\u7528\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e00\u5b9a\u7684API\u53bb\u8f6e\u8be2<br \/>\n\u72b6&nbsp;\u6001\uff0c\u5728\u9002\u5f53\u7684\u65f6\u5019\u8c03\u7528\u963b\u585e\u51fd\u6570\uff0c\u5c31\u53ef\u4ee5\u907f\u514d\u963b\u585e\u3002\u800c\u5bf9\u4e8e\u975e\u963b\u585e\u5bf9\u8c61\uff0c\u8c03\u7528\u7279\u6b8a\u7684\u51fd\u6570\u4e5f\u53ef\u4ee5\u8fdb\u5165\u963b\u585e\u8c03\u7528\u3002\u51fd\u6570select\u5c31\u662f\u8fd9\u6837\u7684\u4e00\u4e2a\u4f8b\u5b50\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1. \u540c\u6b65\uff0c\u5c31\u662f\u6211\u8c03\u7528\u4e00\u4e2a\u529f\u80fd\uff0c\u8be5\u529f\u80fd\u6ca1\u6709\u7ed3\u675f\u524d\uff0c\u6211\u6b7b\u7b49\u7ed3\u679c\u3002<br \/>\n2. \u5f02\u6b65\uff0c\u5c31\u662f\u6211\u8c03\u7528\u4e00\u4e2a\u529f\u80fd\uff0c\u4e0d\u9700\u8981\u77e5\u9053\u8be5\u529f\u80fd\u7ed3\u679c\uff0c\u8be5\u529f\u80fd\u6709\u7ed3\u679c\u540e\u901a\u77e5\u6211\uff08\u56de\u8c03\u901a\u77e5\uff09<br \/>\n3. \u963b\u585e\uff0c &nbsp; &nbsp; &nbsp;\u5c31\u662f\u8c03\u7528\u6211\uff08\u51fd\u6570\uff09\uff0c\u6211\uff08\u51fd\u6570\uff09\u6ca1\u6709\u63a5\u6536\u5b8c\u6570\u636e\u6216\u8005\u6ca1\u6709\u5f97\u5230\u7ed3\u679c\u4e4b\u524d\uff0c\u6211\u4e0d\u4f1a\u8fd4\u56de\u3002<br \/>\n4. \u975e\u963b\u585e\uff0c &nbsp;\u5c31\u662f\u8c03\u7528\u6211\uff08\u51fd\u6570\uff09\uff0c\u6211\uff08\u51fd\u6570\uff09\u7acb\u5373\u8fd4\u56de\uff0c\u901a\u8fc7select\u901a\u77e5\u8c03\u7528\u8005<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u540c\u6b65IO\u548c\u5f02\u6b65IO\u7684\u533a\u522b\u5c31\u5728\u4e8e\uff1a\u6570\u636e\u62f7\u8d1d\u7684\u65f6\u5019\u8fdb\u7a0b\u662f\u5426\u963b\u585e\uff01<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u963b\u585eIO\u548c\u975e\u963b\u585eIO\u7684\u533a\u522b\u5c31\u5728\u4e8e\uff1a\u5e94\u7528\u7a0b\u5e8f\u7684\u8c03\u7528\u662f\u5426\u7acb\u5373\u8fd4\u56de\uff01<\/span>\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u5bf9\u4e8e\u4e3e\u4e2a\u7b80\u5355c\/s \u6a21\u5f0f\uff1a<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<div>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u540c\u6b65\uff1a\u63d0\u4ea4\u8bf7\u6c42-&gt;\u7b49\u5f85\u670d\u52a1\u5668\u5904\u7406-&gt;\u5904\u7406\u5b8c\u6bd5\u8fd4\u56de\u8fd9\u4e2a\u671f\u95f4\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\u4e0d\u80fd\u5e72\u4efb\u4f55\u4e8b<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u5f02\u6b65\uff1a\u8bf7\u6c42\u901a\u8fc7\u4e8b\u4ef6\u89e6\u53d1-&gt;\u670d\u52a1\u5668\u5904\u7406\uff08\u8fd9\u662f\u6d4f\u89c8\u5668\u4ecd\u7136\u53ef\u4ee5\u4f5c\u5176\u4ed6\u4e8b\u60c5\uff09-&gt;\u5904\u7406\u5b8c\u6bd5<\/span>\n<\/div>\n<div>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u540c\u6b65\u548c\u5f02\u6b65\u90fd\u53ea\u9488\u5bf9\u4e8e\u672c\u673aSOCKET\u800c\u8a00\u7684\u3002<\/span>\n<\/div>\n<div>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u540c\u6b65\u548c\u5f02\u6b65,\u963b\u585e\u548c\u975e\u963b\u585e,\u6709\u4e9b\u6df7\u7528,\u5176\u5b9e\u5b83\u4eec\u5b8c\u5168\u4e0d\u662f\u4e00\u56de\u4e8b,\u800c\u4e14\u5b83\u4eec\u4fee\u9970\u7684\u5bf9\u8c61\u4e5f\u4e0d\u76f8\u540c\u3002<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u963b\u585e\u548c\u975e\u963b\u585e\u662f\u6307\u5f53\u8fdb\u7a0b\u8bbf\u95ee\u7684\u6570\u636e\u5982\u679c\u5c1a\u672a\u5c31\u7eea,\u8fdb\u7a0b\u662f\u5426\u9700\u8981\u7b49\u5f85,\u7b80\u5355\u8bf4\u8fd9\u76f8\u5f53\u4e8e\u51fd\u6570\u5185\u90e8\u7684\u5b9e\u73b0\u533a\u522b,\u4e5f\u5c31\u662f\u672a\u5c31\u7eea\u65f6\u662f\u76f4\u63a5\u8fd4\u56de\u8fd8\u662f\u7b49\u5f85\u5c31\u7eea;<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u800c<br \/>\n\u540c\u6b65\u548c\u5f02\u6b65\u662f\u6307\u8bbf\u95ee\u6570\u636e\u7684\u673a\u5236,\u540c\u6b65\u4e00\u822c\u6307\u4e3b\u52a8\u8bf7\u6c42\u5e76\u7b49\u5f85I\/O\u64cd\u4f5c\u5b8c\u6bd5\u7684\u65b9\u5f0f,\u5f53\u6570\u636e\u5c31\u7eea\u540e\u5728\u8bfb\u5199\u7684\u65f6\u5019\u5fc5\u987b\u963b\u585e(\u533a\u522b\u5c31\u7eea\u4e0e\u8bfb\u5199\u4e8c\u4e2a\u9636\u6bb5,\u540c\u6b65\u7684\u8bfb\u5199<br \/>\n\u5fc5\u987b\u963b\u585e),\u5f02\u6b65\u5219\u6307\u4e3b\u52a8\u8bf7\u6c42\u6570\u636e\u540e\u4fbf\u53ef\u4ee5\u7ee7\u7eed\u5904\u7406\u5176\u5b83\u4efb\u52a1,\u968f\u540e\u7b49\u5f85I\/O,\u64cd\u4f5c\u5b8c\u6bd5\u7684\u901a\u77e5,\u8fd9\u53ef\u4ee5\u4f7f\u8fdb\u7a0b\u5728\u6570\u636e\u8bfb\u5199\u65f6\u4e5f\u4e0d\u963b\u585e\u3002(\u7b49\u5f85&#8221;\u901a\u77e5&#8221;)<\/span>\n\t<\/p>\n<\/div>\n<h2>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t1\"><\/a><a name=\"t1\"><\/a><\/span><br \/>\n<\/h2>\n<p class=\"headline-1 bk-sidecatalog-title\">\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1. Linux\u4e0b\u7684\u4e94\u79cdI\/O\u6a21\u578b<\/span>\n<\/p>\n<div>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1)\u963b\u585eI\/O\uff08blocking I\/O\uff09<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">2)\u975e\u963b\u585eI\/O&nbsp;\uff08nonblocking I\/O\uff09<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">3) I\/O\u590d\u7528(select \u548cpoll)&nbsp;\uff08I\/O multiplexing\uff09<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">4)\u4fe1\u53f7\u9a71\u52a8I\/O&nbsp;\uff08signal driven I\/O (SIGIO)\uff09<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">5)\u5f02\u6b65I\/O&nbsp;\uff08asynchronous I\/O (the POSIX aio_functions)\uff09<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u524d\u56db\u79cd\u90fd\u662f\u540c\u6b65\uff0c\u53ea\u6709\u6700\u540e\u4e00\u79cd\u624d\u662f\u5f02\u6b65IO\u3002<\/span>\n\t<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E9%98%BB%E5%A1%9EIO%E6%A8%A1%E5%9E%8B%EF%BC%9A\"><\/span>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t2\"><\/a><a name=\"t2\"><\/a><strong>\u963b\u585eI\/O\u6a21\u578b\uff1a<\/strong><\/span><br \/>\n\t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u7b80\u4ecb\uff1a\u8fdb\u7a0b\u4f1a\u4e00\u76f4\u963b\u585e\uff0c\u76f4\u5230\u6570\u636e\u62f7\u8d1d\u5b8c\u6210<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp; \u5e94\u7528\u7a0b\u5e8f\u8c03\u7528\u4e00\u4e2aIO\u51fd\u6570\uff0c\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u963b\u585e\uff0c\u7b49\u5f85\u6570\u636e\u51c6\u5907\u597d\u3002 \u5982\u679c\u6570\u636e\u6ca1\u6709\u51c6\u5907\u597d\uff0c\u4e00\u76f4\u7b49\u5f85\u2026.\u6570\u636e\u51c6\u5907\u597d\u4e86\uff0c\u4ece\u5185\u6838\u62f7\u8d1d\u5230\u7528\u6237\u7a7a\u95f4,IO\u51fd\u6570\u8fd4\u56de\u6210\u529f\u6307\u793a\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>\u963b\u585eI\/O\u6a21\u578b\u56fe\uff1a<\/strong>\u5728\u8c03\u7528recv()\/recvfrom\uff08\uff09\u51fd\u6570\u65f6\uff0c\u53d1\u751f\u5728\u5185\u6838\u4e2d\u7b49\u5f85\u6570\u636e\u548c\u590d\u5236\u6570\u636e\u7684\u8fc7\u7a0b\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><img decoding=\"async\" src=\"http:\/\/my.csdn.net\/uploads\/201204\/12\/1334216532_9745.jpg\" alt=\"\" \/><\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<br \/>\n &nbsp;<br \/>\n\u5f53\u8c03\u7528recv()\u51fd\u6570\u65f6\uff0c\u7cfb\u7edf\u9996\u5148\u67e5\u662f\u5426\u6709\u51c6\u5907\u597d\u7684\u6570\u636e\u3002\u5982\u679c\u6570\u636e\u6ca1\u6709\u51c6\u5907\u597d\uff0c\u90a3\u4e48\u7cfb\u7edf\u5c31\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\u3002\u5f53\u6570\u636e\u51c6\u5907\u597d\u540e\uff0c\u5c06\u6570\u636e\u4ece\u7cfb\u7edf\u7f13\u51b2\u533a\u590d\u5236\u5230\u7528\u6237<br \/>\n\u7a7a\u95f4\uff0c\u7136\u540e\u8be5\u51fd\u6570\u8fd4\u56de\u3002\u5728\u5957\u63a5\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u5f53\u8c03\u7528recv()\u51fd\u6570\u65f6\uff0c\u672a\u5fc5\u7528\u6237\u7a7a\u95f4\u5c31\u5df2\u7ecf\u5b58\u5728\u6570\u636e\uff0c\u90a3\u4e48\u6b64\u65f6recv()\u51fd\u6570\u5c31\u4f1a\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\u3002<br \/>\n<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; &nbsp;\u5f53\u4f7f\u7528socket()\u51fd\u6570\u548cWSASocket()\u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\u65f6\uff0c\u9ed8\u8ba4\u7684\u5957\u63a5\u5b57\u90fd\u662f\u963b\u585e\u7684\u3002\u8fd9\u610f\u5473\u7740\u5f53\u8c03\u7528Windows Sockets API\u4e0d\u80fd\u7acb\u5373\u5b8c\u6210\u65f6\uff0c\u7ebf\u7a0b\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\uff0c\u76f4\u5230\u64cd\u4f5c\u5b8c\u6210\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; \u5e76\u4e0d\u662f\u6240\u6709Windows Sockets API\u4ee5\u963b\u585e\u5957\u63a5\u5b57\u4e3a\u53c2\u6570\u8c03\u7528\u90fd\u4f1a\u53d1\u751f\u963b\u585e\u3002\u4f8b\u5982\uff0c\u4ee5\u963b\u585e\u6a21\u5f0f\u7684\u5957\u63a5\u5b57\u4e3a\u53c2\u6570\u8c03\u7528bind()\u3001listen()\u51fd\u6570\u65f6\uff0c\u51fd\u6570\u4f1a\u7acb\u5373\u8fd4\u56de\u3002\u5c06\u53ef\u80fd\u963b\u585e\u5957\u63a5\u5b57\u7684Windows Sockets API\u8c03\u7528\u5206\u4e3a\u4ee5\u4e0b\u56db\u79cd:<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; 1\uff0e\u8f93\u5165\u64cd\u4f5c\uff1a&nbsp;recv()\u3001recvfrom()\u3001WSARecv()\u548cWSARecvfrom()\u51fd\u6570\u3002\u4ee5\u963b\u585e\u5957\u63a5\u5b57\u4e3a\u53c2\u6570\u8c03\u7528\u8be5\u51fd\u6570\u63a5\u6536\u6570\u636e\u3002\u5982\u679c\u6b64\u65f6\u5957\u63a5\u5b57\u7f13\u51b2\u533a\u5185\u6ca1\u6709\u6570\u636e\u53ef\u8bfb\uff0c\u5219\u8c03\u7528\u7ebf\u7a0b\u5728\u6570\u636e\u5230\u6765\u524d\u4e00\u76f4\u7761\u7720\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; 2\uff0e\u8f93\u51fa\u64cd\u4f5c\uff1a&nbsp;send()\u3001sendto()\u3001WSASend()\u548cWSASendto()\u51fd\u6570\u3002\u4ee5\u963b\u585e\u5957\u63a5\u5b57\u4e3a\u53c2\u6570\u8c03\u7528\u8be5\u51fd\u6570\u53d1\u9001\u6570\u636e\u3002\u5982\u679c\u5957\u63a5\u5b57\u7f13\u51b2\u533a\u6ca1\u6709\u53ef\u7528\u7a7a\u95f4\uff0c\u7ebf\u7a0b\u4f1a\u4e00\u76f4\u7761\u7720\uff0c\u76f4\u5230\u6709\u7a7a\u95f4\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; 3\uff0e\u63a5\u53d7\u8fde\u63a5\uff1aaccept()\u548cWSAAcept()\u51fd\u6570\u3002\u4ee5\u963b\u585e\u5957\u63a5\u5b57\u4e3a\u53c2\u6570\u8c03\u7528\u8be5\u51fd\u6570\uff0c\u7b49\u5f85\u63a5\u53d7\u5bf9\u65b9\u7684\u8fde\u63a5\u8bf7\u6c42\u3002\u5982\u679c\u6b64\u65f6\u6ca1\u6709\u8fde\u63a5\u8bf7\u6c42\uff0c\u7ebf\u7a0b\u5c31\u4f1a\u8fdb\u5165\u7761\u7720\u72b6\u6001\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp;4\uff0e\u5916\u51fa\u8fde\u63a5\uff1aconnect()\u548cWSAConnect()\u51fd\u6570\u3002\u5bf9\u4e8eTCP\u8fde\u63a5\uff0c\u5ba2\u6237\u7aef\u4ee5\u963b\u585e\u5957\u63a5\u5b57\u4e3a\u53c2\u6570\uff0c\u8c03\u7528\u8be5\u51fd\u6570\u5411\u670d\u52a1\u5668\u53d1\u8d77\u8fde\u63a5\u3002\u8be5\u51fd\u6570\u5728\u6536\u5230\u670d\u52a1\u5668\u7684\u5e94\u7b54\u524d\uff0c\u4e0d\u4f1a\u8fd4\u56de\u3002\u8fd9\u610f\u5473\u7740TCP\u8fde\u63a5\u603b\u4f1a\u7b49\u5f85\u81f3\u5c11\u5230\u670d\u52a1\u5668\u7684\u4e00\u6b21\u5f80\u8fd4\u65f6\u95f4\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"> \u4f7f\u7528\u963b\u585e\u6a21\u5f0f\u7684\u5957\u63a5\u5b57\uff0c\u5f00\u53d1\u7f51\u7edc\u7a0b\u5e8f\u6bd4\u8f83\u7b80\u5355\uff0c\u5bb9\u6613\u5b9e\u73b0\u3002\u5f53\u5e0c\u671b\u80fd\u591f\u7acb\u5373\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\uff0c\u4e14\u5904\u7406\u7684\u5957\u63a5\u5b57\u6570\u91cf\u6bd4\u8f83\u5c11\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u963b\u585e\u6a21\u5f0f\u6765\u5f00\u53d1\u7f51\u7edc\u7a0b\u5e8f\u6bd4\u8f83\u5408\u9002\u3002<\/span>\n\t<\/p>\n<p>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<br \/>\n &nbsp;<br \/>\n\u963b\u585e\u6a21\u5f0f\u5957\u63a5\u5b57\u7684\u4e0d\u8db3\u8868\u73b0\u4e3a\uff0c\u5728\u5927\u91cf\u5efa\u7acb\u597d\u7684\u5957\u63a5\u5b57\u7ebf\u7a0b\u4e4b\u95f4\u8fdb\u884c\u901a\u4fe1\u65f6\u6bd4\u8f83\u56f0\u96be\u3002\u5f53\u4f7f\u7528\u201c\u751f\u4ea7\u8005-\u6d88\u8d39\u8005\u201d\u6a21\u578b\u5f00\u53d1\u7f51\u7edc\u7a0b\u5e8f\u65f6\uff0c\u4e3a\u6bcf\u4e2a\u5957\u63a5\u5b57\u90fd\u5206\u522b\u5206\u914d\u4e00<br \/>\n\u4e2a\u8bfb\u7ebf\u7a0b\u3001\u4e00\u4e2a\u5904\u7406\u6570\u636e\u7ebf\u7a0b\u548c\u4e00\u4e2a\u7528\u4e8e\u540c\u6b65\u7684\u4e8b\u4ef6\uff0c\u90a3\u4e48\u8fd9\u6837\u65e0\u7591\u52a0\u5927\u7cfb\u7edf\u7684\u5f00\u9500\u3002\u5176\u6700\u5927\u7684\u7f3a\u70b9\u662f\u5f53\u5e0c\u671b\u540c\u65f6\u5904\u7406\u5927\u91cf\u5957\u63a5\u5b57\u65f6\uff0c\u5c06\u65e0\u4ece\u4e0b\u624b\uff0c\u5176\u6269\u5c55\u6027\u5f88\u5dee<\/span>\n\t<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E9%9D%9E%E9%98%BB%E5%A1%9EIO%E6%A8%A1%E5%9E%8B\"><\/span>\n\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t3\"><\/a><a name=\"t3\"><\/a><strong>\u975e\u963b\u585eIO\u6a21\u578b<\/strong>&nbsp;<\/span><br \/>\n\t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<div>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u7b80\u4ecb\uff1a\u975e\u963b\u585eIO\u901a\u8fc7\u8fdb\u7a0b\u53cd\u590d\u8c03\u7528IO\u51fd\u6570\uff08\u591a\u6b21\u7cfb\u7edf\u8c03\u7528\uff0c\u5e76\u9a6c\u4e0a\u8fd4\u56de\uff09\uff1b\u5728\u6570\u636e\u62f7\u8d1d\u7684\u8fc7\u7a0b\u4e2d\uff0c\u8fdb\u7a0b\u662f\u963b\u585e\u7684\uff1b<\/span>\n<\/div>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br \/>\n\u6211\u4eec\u628a\u4e00\u4e2aSOCKET\u63a5\u53e3\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u5c31\u662f\u544a\u8bc9\u5185\u6838\uff0c\u5f53\u6240\u8bf7\u6c42\u7684I\/O\u64cd\u4f5c\u65e0\u6cd5\u5b8c\u6210\u65f6\uff0c\u4e0d\u8981\u5c06\u8fdb\u7a0b\u7761\u7720\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u3002\u8fd9\u6837\u6211\u4eec\u7684I\/O\u64cd\u4f5c\u51fd\u6570\u5c06<br \/>\n\u4e0d\u65ad\u7684\u6d4b\u8bd5\u6570\u636e\u662f\u5426\u5df2\u7ecf\u51c6\u5907\u597d\uff0c\u5982\u679c\u6ca1\u6709\u51c6\u5907\u597d\uff0c\u7ee7\u7eed\u6d4b\u8bd5\uff0c\u76f4\u5230\u6570\u636e\u51c6\u5907\u597d\u4e3a\u6b62\u3002\u5728\u8fd9\u4e2a\u4e0d\u65ad\u6d4b\u8bd5\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u5927\u91cf\u7684\u5360\u7528CPU\u7684\u65f6\u95f4\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<br \/>\n &nbsp; \u628aSOCKET\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u6a21\u5f0f\uff0c\u5373\u901a\u77e5\u7cfb\u7edf\u5185\u6838\uff1a\u5728\u8c03\u7528Windows Sockets<br \/>\nAPI\u65f6\uff0c\u4e0d\u8981\u8ba9\u7ebf\u7a0b\u7761\u7720\uff0c\u800c\u5e94\u8be5\u8ba9\u51fd\u6570\u7acb\u5373\u8fd4\u56de\u3002\u5728\u8fd4\u56de\u65f6\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4ee3\u7801\u3002\u56fe\u6240\u793a\uff0c\u4e00\u4e2a\u975e\u963b\u585e\u6a21\u5f0f\u5957\u63a5\u5b57\u591a\u6b21\u8c03\u7528recv()\u51fd\u6570\u7684\u8fc7\u7a0b\u3002\u524d<br \/>\n\u4e09\u6b21\u8c03\u7528recv()\u51fd\u6570\u65f6\uff0c\u5185\u6838\u6570\u636e\u8fd8\u6ca1\u6709\u51c6\u5907\u597d\u3002\u56e0\u6b64\uff0c\u8be5\u51fd\u6570\u7acb\u5373\u8fd4\u56deWSAEWOULDBLOCK\u9519\u8bef\u4ee3\u7801\u3002\u7b2c\u56db\u6b21\u8c03\u7528recv()\u51fd\u6570\u65f6\uff0c\u6570\u636e\u5df2<br \/>\n\u7ecf\u51c6\u5907\u597d\uff0c\u88ab\u590d\u5236\u5230\u5e94\u7528\u7a0b\u5e8f\u7684\u7f13\u51b2\u533a\u4e2d\uff0crecv()\u51fd\u6570\u8fd4\u56de\u6210\u529f\u6307\u793a\uff0c\u5e94\u7528\u7a0b\u5e8f\u5f00\u59cb\u5904\u7406\u6570\u636e\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><img decoding=\"async\" src=\"http:\/\/my.csdn.net\/uploads\/201204\/12\/1334216607_3004.jpg\" alt=\"\" \/><\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; &nbsp;\u5f53\u4f7f\u7528socket()\u51fd\u6570\u548cWSASocket()\u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\u65f6\uff0c\u9ed8\u8ba4\u90fd\u662f\u963b\u585e\u7684\u3002\u5728\u521b\u5efa\u5957\u63a5\u5b57\u4e4b\u540e\uff0c\u901a\u8fc7\u8c03\u7528ioctlsocket()\u51fd\u6570\uff0c\u5c06\u8be5\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u6a21\u5f0f\u3002Linux\u4e0b\u7684\u51fd\u6570\u662f:fcntl().<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;<br \/>\n \u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u6a21\u5f0f\u540e\uff0c\u5728\u8c03\u7528Windows Sockets<br \/>\nAPI\u51fd\u6570\u65f6\uff0c\u8c03\u7528\u51fd\u6570\u4f1a\u7acb\u5373\u8fd4\u56de\u3002\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e9b\u51fd\u6570\u8c03\u7528\u90fd\u4f1a\u8c03\u7528\u201c\u5931\u8d25\u201d\uff0c\u5e76\u8fd4\u56deWSAEWOULDBLOCK\u9519\u8bef\u4ee3\u7801\u3002\u8bf4\u660e\u8bf7\u6c42\u7684\u64cd\u4f5c\u5728\u8c03\u7528\u671f<br \/>\n\u95f4\u5185\u6ca1\u6709\u65f6\u95f4\u5b8c\u6210\u3002\u901a\u5e38\uff0c\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u91cd\u590d\u8c03\u7528\u8be5\u51fd\u6570\uff0c\u76f4\u5230\u83b7\u5f97\u6210\u529f\u8fd4\u56de\u4ee3\u7801\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;<br \/>\n \u9700\u8981\u8bf4\u660e\u7684\u662f\u5e76\u975e\u6240\u6709\u7684Windows Sockets<br \/>\nAPI\u5728\u975e\u963b\u585e\u6a21\u5f0f\u4e0b\u8c03\u7528\uff0c\u90fd\u4f1a\u8fd4\u56deWSAEWOULDBLOCK\u9519\u8bef\u3002\u4f8b\u5982\uff0c\u4ee5\u975e\u963b\u585e\u6a21\u5f0f\u7684\u5957\u63a5\u5b57\u4e3a\u53c2\u6570\u8c03\u7528bind()\u51fd\u6570\u65f6\uff0c\u5c31\u4e0d\u4f1a\u8fd4\u56de\u8be5\u9519\u8bef\u4ee3<br \/>\n\u7801\u3002\u5f53\u7136\uff0c\u5728\u8c03\u7528WSAStartup()\u51fd\u6570\u65f6\u66f4\u4e0d\u4f1a\u8fd4\u56de\u8be5\u9519\u8bef\u4ee3\u7801\uff0c\u56e0\u4e3a\u8be5\u51fd\u6570\u662f\u5e94\u7528\u7a0b\u5e8f\u7b2c\u4e00\u8c03\u7528\u7684\u51fd\u6570\uff0c\u5f53\u7136\u4e0d\u4f1a\u8fd4\u56de\u8fd9\u6837\u7684\u9519\u8bef\u4ee3\u7801\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp; \u8981\u5c06\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u6a21\u5f0f\uff0c\u9664\u4e86\u4f7f\u7528ioctlsocket()\u51fd\u6570\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528WSAAsyncselect()\u548cWSAEventselect()\u51fd\u6570\u3002\u5f53\u8c03\u7528\u8be5\u51fd\u6570\u65f6\uff0c\u5957\u63a5\u5b57\u4f1a\u81ea\u52a8\u5730\u8bbe\u7f6e\u4e3a\u975e\u963b\u585e\u65b9\u5f0f\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"> \u7531\u4e8e\u4f7f\u7528\u975e\u963b\u585e\u5957\u63a5\u5b57\u5728\u8c03\u7528\u51fd\u6570\u65f6\uff0c\u4f1a\u7ecf\u5e38\u8fd4\u56deWSAEWOULDBLOCK\u9519\u8bef\u3002\u6240\u4ee5\u5728\u4efb\u4f55\u65f6\u5019\uff0c\u90fd\u5e94\u4ed4\u7ec6\u68c0\u67e5\u8fd4\u56de\u4ee3\u7801\u5e76\u4f5c\u597d\u5bf9\u201c\u5931\u8d25\u201d\u7684\u51c6\u5907\u3002\u5e94\u7528<br \/>\n\u7a0b\u5e8f\u8fde\u7eed\u4e0d\u65ad\u5730\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\uff0c\u76f4\u5230\u5b83\u8fd4\u56de\u6210\u529f\u6307\u793a\u4e3a\u6b62\u3002\u4e0a\u9762\u7684\u7a0b\u5e8f\u6e05\u5355\u4e2d\uff0c\u5728While\u5faa\u73af\u4f53\u5185\u4e0d\u65ad\u5730\u8c03\u7528recv()\u51fd\u6570\uff0c\u4ee5\u8bfb\u51651024\u4e2a\u5b57\u8282\u7684\u6570<br \/>\n\u636e\u3002\u8fd9\u79cd\u505a\u6cd5\u5f88\u6d6a\u8d39\u7cfb\u7edf\u8d44\u6e90\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;<br \/>\n\u8981\u5b8c\u6210\u8fd9\u6837\u7684\u64cd\u4f5c\uff0c\u6709\u4eba\u4f7f\u7528MSG_PEEK\u6807\u5fd7\u8c03\u7528recv()\u51fd\u6570\u67e5\u770b\u7f13\u51b2\u533a\u4e2d\u662f\u5426\u6709\u6570\u636e\u53ef\u8bfb\u3002\u540c\u6837\uff0c\u8fd9\u79cd\u65b9\u6cd5\u4e5f\u4e0d\u597d\u3002\u56e0\u4e3a\u8be5\u505a\u6cd5\u5bf9\u7cfb\u7edf\u9020\u6210\u7684\u5f00\u9500\u662f<br \/>\n\u5f88\u5927\u7684\uff0c\u5e76\u4e14\u5e94\u7528\u7a0b\u5e8f\u81f3\u5c11\u8981\u8c03\u7528recv()\u51fd\u6570\u4e24\u6b21\uff0c\u624d\u80fd\u5b9e\u9645\u5730\u8bfb\u5165\u6570\u636e\u3002\u8f83\u597d\u7684\u505a\u6cd5\u662f\uff0c\u4f7f\u7528\u5957\u63a5\u5b57\u7684\u201cI\/O\u6a21\u578b\u201d\u6765\u5224\u65ad\u975e\u963b\u585e\u5957\u63a5\u5b57\u662f\u5426\u53ef\u8bfb\u53ef\u5199\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp; \u975e\u963b\u585e\u6a21\u5f0f\u5957\u63a5\u5b57\u4e0e\u963b\u585e\u6a21\u5f0f\u5957\u63a5\u5b57\u76f8\u6bd4\uff0c\u4e0d\u5bb9\u6613\u4f7f\u7528\u3002\u4f7f\u7528\u975e\u963b\u585e\u6a21\u5f0f\u5957\u63a5\u5b57\uff0c\u9700\u8981\u7f16\u5199\u66f4\u591a\u7684\u4ee3\u7801\uff0c\u4ee5\u4fbf\u5728\u6bcf\u4e2aWindows Sockets API\u51fd\u6570\u8c03\u7528\u4e2d\uff0c\u5bf9\u6536\u5230\u7684WSAEWOULDBLOCK\u9519\u8bef\u8fdb\u884c\u5904\u7406\u3002\u56e0\u6b64\uff0c\u975e\u963b\u585e\u5957\u63a5\u5b57\u4fbf\u663e\u5f97\u6709\u4e9b\u96be\u4e8e\u4f7f\u7528\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;<br \/>\n\u4f46\u662f\uff0c\u975e\u963b\u585e\u5957\u63a5\u5b57\u5728\u63a7\u5236\u5efa\u7acb\u7684\u591a\u4e2a\u8fde\u63a5\uff0c\u5728\u6570\u636e\u7684\u6536\u53d1\u91cf\u4e0d\u5747\uff0c\u65f6\u95f4\u4e0d\u5b9a\u65f6\uff0c\u660e\u663e\u5177\u6709\u4f18\u52bf\u3002\u8fd9\u79cd\u5957\u63a5\u5b57\u5728\u4f7f\u7528\u4e0a\u5b58\u5728\u4e00\u5b9a\u96be\u5ea6\uff0c\u4f46\u53ea\u8981\u6392\u9664\u4e86\u8fd9\u4e9b\u56f0\u96be\uff0c\u5b83\u5728<br \/>\n\u529f\u80fd\u4e0a\u8fd8\u662f\u975e\u5e38\u5f3a\u5927\u7684\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u53ef\u8003\u8651\u4f7f\u7528\u5957\u63a5\u5b57\u7684\u201cI\/O\u6a21\u578b\u201d\uff0c\u5b83\u6709\u52a9\u4e8e\u5e94\u7528\u7a0b\u5e8f\u901a\u8fc7\u5f02\u6b65\u65b9\u5f0f\uff0c\u540c\u65f6\u5bf9\u4e00\u4e2a\u6216\u591a\u4e2a\u5957\u63a5\u5b57\u7684\u901a\u4fe1\u52a0\u4ee5\u7ba1\u7406\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"> <br \/>\n<\/span>\n<\/p>\n<h3><span class=\"ez-toc-section\" id=\"IO%E5%A4%8D%E7%94%A8%E6%A8%A1%E5%9E%8B%EF%BC%9A\"><\/span>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t4\"><\/a><a name=\"t4\"><\/a><strong>IO\u590d\u7528\u6a21\u578b\uff1a<\/strong><\/span><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u7b80\u4ecb\uff1a\u4e3b\u8981\u662fselect\u548cepoll\uff1b\u5bf9\u4e00\u4e2aIO\u7aef\u53e3\uff0c\u4e24\u6b21\u8c03\u7528\uff0c\u4e24\u6b21\u8fd4\u56de\uff0c\u6bd4\u963b\u585eIO\u5e76\u6ca1\u6709\u4ec0\u4e48\u4f18\u8d8a\u6027\uff1b\u5173\u952e\u662f\u80fd\u5b9e\u73b0\u540c\u65f6\u5bf9\u591a\u4e2aIO\u7aef\u53e3\u8fdb\u884c\u76d1\u542c\uff1b<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<br \/>\n &nbsp;&nbsp;<br \/>\n&nbsp;I\/O\u590d\u7528\u6a21\u578b\u4f1a\u7528\u5230select\u3001poll\u3001epoll\u51fd\u6570\uff0c\u8fd9\u51e0\u4e2a\u51fd\u6570\u4e5f\u4f1a\u4f7f\u8fdb\u7a0b\u963b\u585e\uff0c\u4f46\u662f\u548c\u963b\u585eI\/O\u6240\u4e0d\u540c\u7684\u7684\uff0c\u8fd9\u4e24\u4e2a\u51fd\u6570\u53ef\u4ee5\u540c\u65f6\u963b\u585e\u591a\u4e2aI<br \/>\n\/O\u64cd\u4f5c\u3002\u800c\u4e14\u53ef\u4ee5\u540c\u65f6\u5bf9\u591a\u4e2a\u8bfb\u64cd\u4f5c\uff0c\u591a\u4e2a\u5199\u64cd\u4f5c\u7684I\/O\u51fd\u6570\u8fdb\u884c\u68c0\u6d4b\uff0c\u76f4\u5230\u6709\u6570\u636e\u53ef\u8bfb\u6216\u53ef\u5199\u65f6\uff0c\u624d\u771f\u6b63\u8c03\u7528I\/O\u64cd\u4f5c\u51fd\u6570\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><img decoding=\"async\" src=\"http:\/\/my.csdn.net\/uploads\/201204\/12\/1334216620_6310.jpg\" alt=\"\" \/><\/span>\n<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E4%BF%A1%E5%8F%B7%E9%A9%B1%E5%8A%A8IO\"><\/span>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t5\"><\/a><a name=\"t5\"><\/a>\u4fe1\u53f7\u9a71\u52a8IO<\/span><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp;&nbsp;\u7b80\u4ecb\uff1a\u4e24\u6b21\u8c03\u7528\uff0c\u4e24\u6b21\u8fd4\u56de\uff1b<br \/>\n<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;\u9996\u5148\u6211\u4eec\u5141\u8bb8\u5957\u63a5\u53e3\u8fdb\u884c\u4fe1\u53f7\u9a71\u52a8I\/O,\u5e76\u5b89\u88c5\u4e00\u4e2a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u8fdb\u7a0b\u7ee7\u7eed\u8fd0\u884c\u5e76\u4e0d\u963b\u585e\u3002\u5f53\u6570\u636e\u51c6\u5907\u597d\u65f6\uff0c\u8fdb\u7a0b\u4f1a\u6536\u5230\u4e00\u4e2aSIGIO\u4fe1\u53f7\uff0c\u53ef\u4ee5\u5728\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u4e2d\u8c03\u7528I\/O\u64cd\u4f5c\u51fd\u6570\u5904\u7406\u6570\u636e\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><img decoding=\"async\" src=\"http:\/\/my.csdn.net\/uploads\/201204\/12\/1334216632_6025.jpg\" alt=\"\" \/><\/span>\n<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%BC%82%E6%AD%A5IO%E6%A8%A1%E5%9E%8B\"><\/span>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t6\"><\/a><a name=\"t6\"><\/a><strong>\u5f02\u6b65IO\u6a21\u578b<\/strong><\/span><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u7b80\u4ecb\uff1a\u6570\u636e\u62f7\u8d1d\u7684\u65f6\u5019\u8fdb\u7a0b\u65e0\u9700\u963b\u585e\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>&nbsp; &nbsp; &nbsp;<\/strong>\u5f53\u4e00\u4e2a\u5f02\u6b65\u8fc7\u7a0b\u8c03\u7528\u53d1\u51fa\u540e\uff0c\u8c03\u7528\u8005\u4e0d\u80fd\u7acb\u523b\u5f97\u5230\u7ed3\u679c\u3002\u5b9e\u9645\u5904\u7406\u8fd9\u4e2a\u8c03\u7528\u7684\u90e8\u4ef6\u5728\u5b8c\u6210\u540e\uff0c\u901a\u8fc7\u72b6\u6001\u3001\u901a\u77e5\u548c\u56de\u8c03\u6765\u901a\u77e5\u8c03\u7528\u8005\u7684\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"> <img decoding=\"async\" src=\"http:\/\/my.csdn.net\/uploads\/201204\/12\/1334216641_7821.jpg\" alt=\"\" \/><br \/>\n<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u540c\u6b65IO\u5f15\u8d77\u8fdb\u7a0b\u963b\u585e\uff0c\u76f4\u81f3IO\u64cd\u4f5c\u5b8c\u6210\u3002<br \/>\n\u5f02\u6b65IO\u4e0d\u4f1a\u5f15\u8d77\u8fdb\u7a0b\u963b\u585e\u3002<br \/>\nIO\u590d\u7528\u662f\u5148\u901a\u8fc7select\u8c03\u7528\u963b\u585e\u3002<br \/>\n<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5%E4%B8%AAIO%E6%A8%A1%E5%9E%8B%E7%9A%84%E6%AF%94%E8%BE%83%EF%BC%9A\"><\/span>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t7\"><\/a><a name=\"t7\"><\/a>5\u4e2aI\/O\u6a21\u578b\u7684\u6bd4\u8f83\uff1a<\/span><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><img decoding=\"async\" src=\"http:\/\/my.csdn.net\/uploads\/201204\/12\/1334216724_2405.jpg\" alt=\"\" \/><br \/>\n<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<h2>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><a name=\"t8\"><\/a><a name=\"t8\"><\/a><\/span><br \/>\n<\/h2>\n<p class=\"headline-1 bk-sidecatalog-title\">\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1. select\u3001poll\u3001epoll\u7b80\u4ecb<br \/>\n<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">epoll\u8ddfselect\u90fd\u80fd\u63d0\u4f9b\u591a\u8defI\/O\u590d\u7528\u7684\u89e3\u51b3\u65b9\u6848\u3002\u5728\u73b0\u5728\u7684Linux\u5185\u6838\u91cc\u6709\u90fd\u80fd\u591f\u652f\u6301\uff0c\u5176\u4e2depoll\u662fLinux\u6240\u7279\u6709\uff0c\u800cselect\u5219\u5e94\u8be5\u662fPOSIX\u6240\u89c4\u5b9a\uff0c\u4e00\u822c\u64cd\u4f5c\u7cfb\u7edf\u5747\u6709\u5b9e\u73b0<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>select\uff1a<\/strong><\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">select\u672c\u8d28\u4e0a\u662f\u901a\u8fc7\u8bbe\u7f6e\u6216\u8005\u68c0\u67e5\u5b58\u653efd\u6807\u5fd7\u4f4d\u7684\u6570\u636e\u7ed3\u6784\u6765\u8fdb\u884c\u4e0b\u4e00\u6b65\u5904\u7406\u3002\u8fd9\u6837\u6240\u5e26\u6765\u7684\u7f3a\u70b9\u662f\uff1a<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1\u3001 \u5355\u4e2a\u8fdb\u7a0b\u53ef\u76d1\u89c6\u7684fd\u6570\u91cf\u88ab\u9650\u5236\uff0c\u5373\u80fd\u76d1\u542c\u7aef\u53e3\u7684\u5927\u5c0f\u6709\u9650\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \u4e00\u822c\u6765\u8bf4\u8fd9\u4e2a\u6570\u76ee\u548c\u7cfb\u7edf\u5185\u5b58\u5173\u7cfb\u5f88\u5927\uff0c\u5177\u4f53\u6570\u76ee\u53ef\u4ee5cat \/proc\/sys\/fs\/file-max\u5bdf\u770b\u300232\u4f4d\u673a\u9ed8\u8ba4\u662f1024\u4e2a\u300264\u4f4d\u673a\u9ed8\u8ba4\u662f2048.<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">2\u3001 \u5bf9socket\u8fdb\u884c\u626b\u63cf\u65f6\u662f\u7ebf\u6027\u626b\u63cf\uff0c\u5373\u91c7\u7528\u8f6e\u8be2\u7684\u65b9\u6cd5\uff0c\u6548\u7387\u8f83\u4f4e\uff1a<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br \/>\n\u5f53\u5957\u63a5\u5b57\u6bd4\u8f83\u591a\u7684\u65f6\u5019\uff0c\u6bcf\u6b21select()\u90fd\u8981\u901a\u8fc7\u904d\u5386FD_SETSIZE\u4e2aSocket\u6765\u5b8c\u6210\u8c03\u5ea6,\u4e0d\u7ba1\u54ea\u4e2aSocket\u662f\u6d3b\u8dc3\u7684,\u90fd\u904d\u5386\u4e00\u904d\u3002\u8fd9<br \/>\n\u4f1a\u6d6a\u8d39\u5f88\u591aCPU\u65f6\u95f4\u3002\u5982\u679c\u80fd\u7ed9\u5957\u63a5\u5b57\u6ce8\u518c\u67d0\u4e2a\u56de\u8c03\u51fd\u6570\uff0c\u5f53\u4ed6\u4eec\u6d3b\u8dc3\u65f6\uff0c\u81ea\u52a8\u5b8c\u6210\u76f8\u5173\u64cd\u4f5c\uff0c\u90a3\u5c31\u907f\u514d\u4e86\u8f6e\u8be2\uff0c\u8fd9\u6b63\u662fepoll\u4e0ekqueue\u505a\u7684\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">3\u3001\u9700\u8981\u7ef4\u62a4\u4e00\u4e2a\u7528\u6765\u5b58\u653e\u5927\u91cffd\u7684\u6570\u636e\u7ed3\u6784\uff0c\u8fd9\u6837\u4f1a\u4f7f\u5f97\u7528\u6237\u7a7a\u95f4\u548c\u5185\u6838\u7a7a\u95f4\u5728\u4f20\u9012\u8be5\u7ed3\u6784\u65f6\u590d\u5236\u5f00\u9500\u5927<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>poll\uff1a<\/strong><\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">poll<br \/>\n\u672c\u8d28\u4e0a\u548cselect\u6ca1\u6709\u533a\u522b\uff0c\u5b83\u5c06\u7528\u6237\u4f20\u5165\u7684\u6570\u7ec4\u62f7\u8d1d\u5230\u5185\u6838\u7a7a\u95f4\uff0c\u7136\u540e\u67e5\u8be2\u6bcf\u4e2afd\u5bf9\u5e94\u7684\u8bbe\u5907\u72b6\u6001\uff0c\u5982\u679c\u8bbe\u5907\u5c31\u7eea\u5219\u5728\u8bbe\u5907\u7b49\u5f85\u961f\u5217\u4e2d\u52a0\u5165\u4e00\u9879\u5e76\u7ee7\u7eed\u904d<br \/>\n\u5386\uff0c\u5982\u679c\u904d\u5386\u5b8c\u6240\u6709fd\u540e\u6ca1\u6709\u53d1\u73b0\u5c31\u7eea\u8bbe\u5907\uff0c\u5219\u6302\u8d77\u5f53\u524d\u8fdb\u7a0b\uff0c\u76f4\u5230\u8bbe\u5907\u5c31\u7eea\u6216\u8005\u4e3b\u52a8\u8d85\u65f6\uff0c\u88ab\u5524\u9192\u540e\u5b83\u53c8\u8981\u518d\u6b21\u904d\u5386fd\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u7ecf\u5386\u4e86\u591a\u6b21\u65e0\u8c13\u7684\u904d\u5386\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u5b83\u6ca1\u6709\u6700\u5927\u8fde\u63a5\u6570\u7684\u9650\u5236\uff0c\u539f\u56e0\u662f\u5b83\u662f\u57fa\u4e8e\u94fe\u8868\u6765\u5b58\u50a8\u7684\uff0c\u4f46\u662f\u540c\u6837\u6709\u4e00\u4e2a\u7f3a\u70b9\uff1a<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1\u3001<br \/>\n\u5927\u91cf\u7684fd\u7684\u6570\u7ec4\u88ab\u6574\u4f53\u590d\u5236\u4e8e\u7528\u6237\u6001\u548c\u5185\u6838\u5730\u5740\u7a7a\u95f4\u4e4b\u95f4\uff0c\u800c\u4e0d\u7ba1\u8fd9\u6837\u7684\u590d\u5236\u662f\u4e0d\u662f\u6709\u610f<br \/>\n\u4e49\u3002&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br \/>\n 2\u3001poll\u8fd8\u6709\u4e00\u4e2a\u7279\u70b9\u662f\u201c\u6c34\u5e73\u89e6\u53d1\u201d\uff0c\u5982\u679c\u62a5\u544a\u4e86fd\u540e\uff0c\u6ca1\u6709\u88ab\u5904\u7406\uff0c\u90a3\u4e48\u4e0b\u6b21poll\u65f6\u4f1a\u518d\u6b21\u62a5\u544a\u8be5fd\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"> epoll:<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">epoll<br \/>\n\u652f\u6301\u6c34\u5e73\u89e6\u53d1\u548c\u8fb9\u7f18\u89e6\u53d1\uff0c\u6700\u5927\u7684\u7279\u70b9\u5728\u4e8e\u8fb9\u7f18\u89e6\u53d1\uff0c\u5b83\u53ea\u544a\u8bc9\u8fdb\u7a0b\u54ea\u4e9bfd\u521a\u521a\u53d8\u4e3a\u5c31\u9700\u6001\uff0c\u5e76\u4e14\u53ea\u4f1a\u901a\u77e5\u4e00\u6b21\u3002\u8fd8\u6709\u4e00\u4e2a\u7279\u70b9\u662f\uff0cepoll\u4f7f\u7528\u201c\u4e8b\u4ef6\u201d\u7684\u5c31<br \/>\n\u7eea\u901a\u77e5\u65b9\u5f0f\uff0c\u901a\u8fc7epoll_ctl\u6ce8\u518cfd\uff0c\u4e00\u65e6\u8be5fd\u5c31\u7eea\uff0c\u5185\u6838\u5c31\u4f1a\u91c7\u7528\u7c7b\u4f3ccallback\u7684\u56de\u8c03\u673a\u5236\u6765\u6fc0\u6d3b\u8be5fd\uff0cepoll_wait\u4fbf\u53ef\u4ee5\u6536<br \/>\n\u5230\u901a\u77e5<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">epoll\u7684\u4f18\u70b9\uff1a<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<div>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>1\u3001\u6ca1\u6709\u6700\u5927\u5e76\u53d1\u8fde\u63a5\u7684\u9650\u5236\uff0c<\/strong>\u80fd\u6253\u5f00\u7684FD\u7684\u4e0a\u9650\u8fdc\u5927\u4e8e1024\uff081G\u7684\u5185\u5b58\u4e0a\u80fd\u76d1\u542c\u7ea610\u4e07\u4e2a\u7aef\u53e3\uff09\uff1b<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>2\u3001\u6548\u7387\u63d0\u5347<\/strong>\uff0c\u4e0d\u662f\u8f6e\u8be2\u7684\u65b9\u5f0f\uff0c\u4e0d\u4f1a\u968f\u7740FD\u6570\u76ee\u7684\u589e\u52a0\u6548\u7387\u4e0b\u964d\u3002\u53ea\u6709\u6d3b\u8dc3\u53ef\u7528\u7684FD\u624d\u4f1a\u8c03\u7528callback\u51fd\u6570\uff1b<\/span><br \/>\n<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u5373Epoll\u6700\u5927\u7684\u4f18\u70b9\u5c31\u5728\u4e8e\u5b83\u53ea\u7ba1\u4f60\u201c\u6d3b\u8dc3\u201d\u7684\u8fde\u63a5\uff0c\u800c\u8ddf\u8fde\u63a5\u603b\u6570\u65e0\u5173\uff0c\u56e0\u6b64\u5728\u5b9e\u9645\u7684\u7f51\u7edc\u73af\u5883\u4e2d\uff0cEpoll\u7684\u6548\u7387\u5c31\u4f1a\u8fdc\u8fdc\u9ad8\u4e8eselect\u548cpoll\u3002<\/span>\n<\/div>\n<div>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>3\u3001&nbsp;\u5185\u5b58\u62f7\u8d1d<\/strong>\uff0c\u5229\u7528mmap()\u6587\u4ef6\u6620\u5c04\u5185\u5b58\u52a0\u901f\u4e0e\u5185\u6838\u7a7a\u95f4\u7684\u6d88\u606f\u4f20\u9012\uff1b\u5373epoll\u4f7f\u7528mmap\u51cf\u5c11\u590d\u5236\u5f00\u9500\u3002<\/span><\/p>\n<p><span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>select\u3001poll\u3001epoll \u533a\u522b\u603b\u7ed3\uff1a<\/strong><\/span>\n<\/div>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1\u3001\u652f\u6301\u4e00\u4e2a\u8fdb\u7a0b\u6240\u80fd\u6253\u5f00\u7684\u6700\u5927\u8fde\u63a5\u6570<\/span>\n<\/p>\n<table border=\"1\" cellpadding=\"0\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">select<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u5355<br \/>\n\u4e2a\u8fdb\u7a0b\u6240\u80fd\u6253\u5f00\u7684\u6700\u5927\u8fde\u63a5\u6570\u6709FD_SETSIZE\u5b8f\u5b9a\u4e49\uff0c\u5176\u5927\u5c0f\u662f32\u4e2a\u6574\u6570\u7684\u5927\u5c0f\uff08\u572832\u4f4d\u7684\u673a\u5668\u4e0a\uff0c\u5927\u5c0f\u5c31\u662f32*32\uff0c\u540c\u740664\u4f4d\u673a\u5668\u4e0a<br \/>\nFD_SETSIZE\u4e3a32*64\uff09\uff0c\u5f53\u7136\u6211\u4eec\u53ef\u4ee5\u5bf9\u8fdb\u884c\u4fee\u6539\uff0c\u7136\u540e\u91cd\u65b0\u7f16\u8bd1\u5185\u6838\uff0c\u4f46\u662f\u6027\u80fd\u53ef\u80fd\u4f1a\u53d7\u5230\u5f71\u54cd\uff0c\u8fd9\u9700\u8981\u8fdb\u4e00\u6b65\u7684\u6d4b\u8bd5\u3002<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">poll<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">poll\u672c\u8d28\u4e0a\u548cselect\u6ca1\u6709\u533a\u522b\uff0c\u4f46\u662f\u5b83\u6ca1\u6709\u6700\u5927\u8fde\u63a5\u6570\u7684\u9650\u5236\uff0c\u539f\u56e0\u662f\u5b83\u662f\u57fa\u4e8e\u94fe\u8868\u6765\u5b58\u50a8\u7684<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">epoll<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u867d\u7136\u8fde\u63a5\u6570\u6709\u4e0a\u9650\uff0c\u4f46\u662f\u5f88\u5927\uff0c1G\u5185\u5b58\u7684\u673a\u5668\u4e0a\u53ef\u4ee5\u6253\u5f0010\u4e07\u5de6\u53f3\u7684\u8fde\u63a5\uff0c2G\u5185\u5b58\u7684\u673a\u5668\u53ef\u4ee5\u6253\u5f0020\u4e07\u5de6\u53f3\u7684\u8fde\u63a5<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">2\u3001FD\u5267\u589e\u540e\u5e26\u6765\u7684IO\u6548\u7387\u95ee\u9898<\/span>\n<\/p>\n<table border=\"1\" cellpadding=\"0\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">select<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u56e0\u4e3a\u6bcf\u6b21\u8c03\u7528\u65f6\u90fd\u4f1a\u5bf9\u8fde\u63a5\u8fdb\u884c\u7ebf\u6027\u904d\u5386\uff0c\u6240\u4ee5\u968f\u7740FD\u7684\u589e\u52a0\u4f1a\u9020\u6210\u904d\u5386\u901f\u5ea6\u6162\u7684\u201c\u7ebf\u6027\u4e0b\u964d\u6027\u80fd\u95ee\u9898\u201d\u3002<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">poll<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u540c\u4e0a<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">epoll<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u56e0<br \/>\n\u4e3aepoll\u5185\u6838\u4e2d\u5b9e\u73b0\u662f\u6839\u636e\u6bcf\u4e2afd\u4e0a\u7684callback\u51fd\u6570\u6765\u5b9e\u73b0\u7684\uff0c\u53ea\u6709\u6d3b\u8dc3\u7684socket\u624d\u4f1a\u4e3b\u52a8\u8c03\u7528callback\uff0c\u6240\u4ee5\u5728\u6d3b\u8dc3socket<br \/>\n\u8f83\u5c11\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528epoll\u6ca1\u6709\u524d\u9762\u4e24\u8005\u7684\u7ebf\u6027\u4e0b\u964d\u7684\u6027\u80fd\u95ee\u9898\uff0c\u4f46\u662f\u6240\u6709socket\u90fd\u5f88\u6d3b\u8dc3\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u4f1a\u6709\u6027\u80fd\u95ee\u9898\u3002<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">3\u3001 \u6d88\u606f\u4f20\u9012\u65b9\u5f0f<\/span>\n<\/p>\n<table border=\"1\" cellpadding=\"0\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">select<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u5185\u6838\u9700\u8981\u5c06\u6d88\u606f\u4f20\u9012\u5230\u7528\u6237\u7a7a\u95f4\uff0c\u90fd\u9700\u8981\u5185\u6838\u62f7\u8d1d\u52a8\u4f5c<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">poll<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u540c\u4e0a<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"111\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">epoll<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<td width=\"457\">\n<p>\n\t\t\t\t\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">epoll\u901a\u8fc7\u5185\u6838\u548c\u7528\u6237\u7a7a\u95f4\u5171\u4eab\u4e00\u5757\u5185\u5b58\u6765\u5b9e\u73b0\u7684\u3002<\/span>\n\t\t\t\t<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\"><strong>\u603b\u7ed3\uff1a<\/strong><\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u7efc\u4e0a\uff0c\u5728\u9009\u62e9select\uff0cpoll\uff0cepoll\u65f6\u8981\u6839\u636e\u5177\u4f53\u7684\u4f7f\u7528\u573a\u5408\u4ee5\u53ca\u8fd9\u4e09\u79cd\u65b9\u5f0f\u7684\u81ea\u8eab\u7279\u70b9\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1\u3001\u8868\u9762\u4e0a\u770bepoll\u7684\u6027\u80fd\u6700\u597d\uff0c\u4f46\u662f\u5728\u8fde\u63a5\u6570\u5c11\u5e76\u4e14\u8fde\u63a5\u90fd\u5341\u5206\u6d3b\u8dc3\u7684\u60c5\u51b5\u4e0b\uff0cselect\u548cpoll\u7684\u6027\u80fd\u53ef\u80fd\u6bd4epoll\u597d\uff0c\u6bd5\u7adfepoll\u7684\u901a\u77e5\u673a\u5236\u9700\u8981\u5f88\u591a\u51fd\u6570\u56de\u8c03\u3002<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">2\u3001select\u4f4e\u6548\u662f\u56e0\u4e3a\u6bcf\u6b21\u5b83\u90fd\u9700\u8981\u8f6e\u8be2\u3002\u4f46\u4f4e\u6548\u4e5f\u662f\u76f8\u5bf9\u7684\uff0c\u89c6\u60c5\u51b5\u800c\u5b9a\uff0c\u4e5f\u53ef\u901a\u8fc7\u826f\u597d\u7684\u8bbe\u8ba1\u6539\u5584<\/span>\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">\u672c\u6587\u8f6c\u81ea\u4f5c\u8005\uff1a<a href=\"http:\/\/blog.csdn.net\/hguisu?viewmode=list\" target=\"_blank\">huangguisu<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\n\t&nbsp;<span>\u672c\u6587\u8f6c\u81ea\u4f5c\u8005\uff1a<\/span><a href=\"http:\/\/blog.csdn.net\/hguisu?viewmode=list\" target=\"_blank\">huangguisu<\/a>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p class=\"headline-1 bk-sidecatalog-title\">\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">1. \u6982\u5ff5\u7406\u89e3<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp;<\/span>\n<\/p>\n<p>\n\t<span style=\"font-family:'comic sans ms', sans-serif;font-size:16px;\">&nbsp; &nbsp; &nbsp;\u5728\u8fdb\u884c\u7f51\u7edc\u7f16\u7a0b\u65f6\uff0c\u6211\u4eec\u5e38\u5e38\u89c1\u5230\u540c\u6b65(Sync)\/\u5f02\u6b65(Async)\uff0c\u963b\u585e(Block)\/\u975e\u963b\u585e(Unblock)\u56db\u79cd\u8c03\u7528\u65b9\u5f0f\uff1a<br \/>\n<strong>\u540c\u6b65\uff1a<\/strong><br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u6240\u8c13\u540c\u6b65\uff0c\u5c31\u662f\u5728\u53d1\u51fa\u4e00\u4e2a\u529f\u80fd\u8c03\u7528\u65f6\uff0c\u5728\u6ca1\u6709\u5f97\u5230\u7ed3\u679c\u4e4b\u524d\uff0c\u8be5\u8c03\u7528&#8230;<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[332],"tags":[],"class_list":["post-111","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Linux\u7f51\u7edc\u7f16\u7a0b\u4e4bI\/O\u6a21\u578b - Wayne&#039;s Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/weizn.net\/?p=111\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux\u7f51\u7edc\u7f16\u7a0b\u4e4bI\/O\u6a21\u578b - Wayne&#039;s Blog\" \/>\n<meta property=\"og:description\" content=\"&nbsp;\u672c\u6587\u8f6c\u81ea\u4f5c\u8005\uff1ahuangguisu    &nbsp;    1. \u6982\u5ff5\u7406\u89e3    &nbsp;    &nbsp; &nbsp; &nbsp;\u5728\u8fdb\u884c\u7f51\u7edc\u7f16\u7a0b\u65f6\uff0c\u6211\u4eec\u5e38\u5e38\u89c1\u5230\u540c\u6b65(Sync)\/\u5f02\u6b65(Async)\uff0c\u963b\u585e(Block)\/\u975e\u963b\u585e(Unblock)\u56db\u79cd\u8c03\u7528\u65b9\u5f0f\uff1a \u540c\u6b65\uff1a &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u6240\u8c13\u540c\u6b65\uff0c\u5c31\u662f\u5728\u53d1\u51fa\u4e00\u4e2a\u529f\u80fd\u8c03\u7528\u65f6\uff0c\u5728\u6ca1\u6709\u5f97\u5230\u7ed3\u679c\u4e4b\u524d\uff0c\u8be5\u8c03\u7528...\" \/>\n<meta property=\"og:url\" content=\"http:\/\/weizn.net\/?p=111\" \/>\n<meta property=\"og:site_name\" content=\"Wayne&#039;s 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