{"id":4236,"date":"2020-04-07T15:53:42","date_gmt":"2020-04-07T07:53:42","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=4236"},"modified":"2020-04-07T15:54:04","modified_gmt":"2020-04-07T07:54:04","slug":"proactor-%e4%b8%8e-reactor","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/4236","title":{"rendered":"Proactor \u4e0e Reactor"},"content":{"rendered":"

\u539f\u6587\u5730\u5740<\/a><\/p>\n

 <\/p>\n

\n
\u8bbe\u8ba1\u6a21\u5f0f<\/a><\/div>\n
\u53d1\u5e03\u4e8e 2019-02-27\u00a0<\/span>\u00a0\u00a0\u7ea6 9 \u5206\u949f<\/span><\/div>\n<\/div>\n
Reactor\u548cProactor\u5bf9\u6bd4\u4ee5\u53ca\u4f18\u7f3a\u70b9<\/a>\u4e24\u79cd\u9ad8\u6548\u7684\u4e8b\u4ef6\u5904\u7406\u6a21\u578b\uff1aReactor\u6a21\u5f0f\u548cProactor\u6a21\u5f0f<\/a><\/p>\n
\n

\u5728\u9ad8\u6027\u80fd\u7684I\/O\u8bbe\u8ba1\u4e2d\uff0c\u6709\u4e24\u4e2a\u6bd4\u8f83\u8457\u540d\u7684\u6a21\u5f0fReactor\u548cProactor\u6a21\u5f0f\uff0c\u5176\u4e2dReactor\u6a21\u5f0f\u7528\u4e8e\u540c\u6b65I\/O\uff0c\u800cProactor\u8fd0\u7528\u4e8e\u5f02\u6b65I\/O\u64cd\u4f5c\u3002<\/strong><\/p>\n

\u5728\u6bd4\u8f83\u8fd9\u4e24\u4e2a\u6a21\u5f0f\u4e4b\u524d\uff0c\u6211\u4eec\u9996\u5148\u7684\u641e\u660e\u767d\u51e0\u4e2a\u6982\u5ff5\uff0c\u4ec0\u4e48\u662f\u963b\u585e\u548c\u975e\u963b\u585e\uff0c\u4ec0\u4e48\u662f\u540c\u6b65\u548c\u5f02\u6b65?<\/p>\n

\u540c\u6b65\u548c\u5f02\u6b65<\/strong>\u662f\u9488\u5bf9\u5e94\u7528\u7a0b\u5e8f\u548c\u5185\u6838\u7684\u4ea4\u4e92\u800c\u8a00\u7684\uff0c\u540c\u6b65\u6307\u7684\u662f\u7528\u6237\u8fdb\u7a0b\u89e6\u53d1IO\u64cd\u4f5c\u5e76\u7b49\u5f85\u6216\u8005\u8f6e\u8be2\u7684\u53bb\u67e5\u770bIO\u64cd\u4f5c\u662f\u5426\u5c31\u7eea\uff0c\u800c\u5f02\u6b65\u662f\u6307\u7528\u6237\u8fdb\u7a0b\u89e6\u53d1IO\u64cd\u4f5c\u4ee5\u540e\u4fbf\u5f00\u59cb\u505a\u81ea\u5df1\u7684\u4e8b\u60c5\uff0c\u800c\u5f53IO\u64cd\u4f5c\u5df2\u7ecf\u5b8c\u6210\u7684\u65f6\u5019\u4f1a\u5f97\u5230IO\u5b8c\u6210\u7684\u901a\u77e5\uff08\u5f02\u6b65\u7684\u7279\u70b9\u5c31\u662f\u901a\u77e5\uff09\u3002<\/p>\n

\u963b\u585e\u548c\u975e\u963b<\/strong>\u585e\u662f\u9488\u5bf9\u4e8e\u8fdb\u7a0b\u5728\u8bbf\u95ee\u6570\u636e\u7684\u65f6\u5019\uff0c\u6839\u636eIO\u64cd\u4f5c\u7684\u5c31\u7eea\u72b6\u6001\u6765\u91c7\u53d6\u7684\u4e0d\u540c\u65b9\u5f0f\uff0c\u8bf4\u767d\u4e86\u662f\u4e00\u79cd\u8bfb\u53d6\u6216\u8005\u5199\u5165\u64cd\u4f5c\u51fd\u6570\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u963b\u585e\u65b9\u5f0f\u4e0b\u8bfb\u53d6\u6216\u8005\u5199\u5165\u51fd\u6570\u5c06\u4e00\u76f4\u7b49\u5f85\uff0c\u800c\u975e\u963b\u585e\u65b9\u5f0f\u4e0b\uff0c\u8bfb\u53d6\u6216\u8005\u5199\u5165\u51fd\u6570\u4f1a\u7acb\u5373\u8fd4\u56de\u4e00\u4e2a\u72b6\u6001\u503c\u3002<\/p>\n

\u4e00\u822c\u6765\u8bf4I\/O\u6a21\u578b\u53ef\u4ee5\u5206\u4e3a\uff1a\u540c\u6b65\u963b\u585e\uff0c\u540c\u6b65\u975e\u963b\u585e\uff0c\u5f02\u6b65\u963b\u585e\uff0c\u5f02\u6b65\u975e\u963b\u585eIO<\/strong><\/p>\n

\u540c\u6b65\u963b\u585eIO<\/strong>\uff1a\u5728\u6b64\u79cd\u65b9\u5f0f\u4e0b\uff0c\u7528\u6237\u8fdb\u7a0b\u5728\u53d1\u8d77\u4e00\u4e2aIO\u64cd\u4f5c\u4ee5\u540e\uff0c\u5fc5\u987b\u7b49\u5f85IO\u64cd\u4f5c\u7684\u5b8c\u6210\uff0c\u53ea\u6709\u5f53\u771f\u6b63\u5b8c\u6210\u4e86IO\u64cd\u4f5c\u4ee5\u540e\uff0c\u7528\u6237\u8fdb\u7a0b\u624d\u80fd\u8fd0\u884c\u3002JAVA\u4f20\u7edf\u7684IO\u6a21\u578b\u5c5e\u4e8e\u6b64\u79cd\u65b9\u5f0f\uff01<\/p>\n

\u540c\u6b65\u975e\u963b\u585eIO<\/strong>\uff1a\u5728\u6b64\u79cd\u65b9\u5f0f\u4e0b\uff0c\u7528\u6237\u8fdb\u7a0b\u53d1\u8d77\u4e00\u4e2aIO\u64cd\u4f5c\u4ee5\u540e\u8fb9\u53ef\u8fd4\u56de\u505a\u5176\u5b83\u4e8b\u60c5\uff0c\u4f46\u662f\u7528\u6237\u8fdb\u7a0b\u9700\u8981\u65f6\u4e0d\u65f6\u7684\u8be2\u95eeIO\u64cd\u4f5c\u662f\u5426\u5c31\u7eea\uff0c\u8fd9\u5c31\u8981\u6c42\u7528\u6237\u8fdb\u7a0b\u4e0d\u505c\u7684\u53bb\u8be2\u95ee\uff0c\u4ece\u800c\u5f15\u5165\u4e0d\u5fc5\u8981\u7684CPU\u8d44\u6e90\u6d6a\u8d39\u3002\u5176\u4e2d\u76ee\u524dJAVA\u7684NIO\u5c31\u5c5e\u4e8e\u540c\u6b65\u975e\u963b\u585eIO\u3002<\/p>\n

\u5f02\u6b65\u963b\u585eIO<\/strong>\uff1a\u6b64\u79cd\u65b9\u5f0f\u4e0b\u662f\u6307\u5e94\u7528\u53d1\u8d77\u4e00\u4e2aIO\u64cd\u4f5c\u4ee5\u540e\uff0c\u4e0d\u7b49\u5f85\u5185\u6838IO\u64cd\u4f5c\u7684\u5b8c\u6210\uff0c\u7b49\u5185\u6838\u5b8c\u6210IO\u64cd\u4f5c\u4ee5\u540e\u4f1a\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\uff0c\u8fd9\u5176\u5b9e\u5c31\u662f\u540c\u6b65\u548c\u5f02\u6b65\u6700\u5173\u952e\u7684\u533a\u522b\uff0c\u540c\u6b65\u5fc5\u987b\u7b49\u5f85\u6216\u8005\u4e3b\u52a8\u7684\u53bb\u8be2\u95eeIO\u662f\u5426\u5b8c\u6210\uff0c\u90a3\u4e48\u4e3a\u4ec0\u4e48\u8bf4\u662f\u963b\u585e\u7684\u5462\uff1f\u56e0\u4e3a\u6b64\u65f6\u662f\u901a\u8fc7select\u7cfb\u7edf\u8c03\u7528\u6765\u5b8c\u6210\u7684\uff0c\u800cselect\u51fd\u6570\u672c\u8eab\u7684\u5b9e\u73b0\u65b9\u5f0f\u662f\u963b\u585e\u7684\uff0c\u800c\u91c7\u7528select\u51fd\u6570\u6709\u4e2a\u597d\u5904\u5c31\u662f\u5b83\u53ef\u4ee5\u540c\u65f6\u76d1\u542c\u591a\u4e2a\u6587\u4ef6\u53e5\u67c4\uff08\u5982\u679c\u4eceUNP\u7684\u89d2\u5ea6\u770b\uff0cselect\u5c5e\u4e8e\u540c\u6b65\u64cd\u4f5c\u3002\u56e0\u4e3aselect\u4e4b\u540e\uff0c\u8fdb\u7a0b\u8fd8\u9700\u8981\u8bfb\u5199\u6570\u636e\uff09\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u5e76\u53d1\u6027\uff01<\/p>\n

\u5f02\u6b65\u975e\u963b\u585eIO<\/strong>\uff1a\u5728\u6b64\u79cd\u6a21\u5f0f\u4e0b\uff0c\u7528\u6237\u8fdb\u7a0b\u53ea\u9700\u8981\u53d1\u8d77\u4e00\u4e2aIO\u64cd\u4f5c\u7136\u540e\u7acb\u5373\u8fd4\u56de\uff0c\u7b49IO\u64cd\u4f5c\u771f\u6b63\u7684\u5b8c\u6210\u4ee5\u540e\uff0c\u5e94\u7528\u7a0b\u5e8f\u4f1a\u5f97\u5230IO\u64cd\u4f5c\u5b8c\u6210\u7684\u901a\u77e5\uff0c\u6b64\u65f6\u7528\u6237\u8fdb\u7a0b\u53ea\u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u5904\u7406\u5c31\u597d\u4e86\uff0c\u4e0d\u9700\u8981\u8fdb\u884c\u5b9e\u9645\u7684IO\u8bfb\u5199\u64cd\u4f5c\uff0c\u56e0\u4e3a\u771f\u6b63\u7684IO\u8bfb\u53d6\u6216\u8005\u5199\u5165\u64cd\u4f5c\u5df2\u7ecf\u7531\u5185\u6838\u5b8c\u6210\u4e86\u3002\u76ee\u524dJava\u4e2d\u8fd8\u6ca1\u6709\u652f\u6301\u6b64\u79cdIO\u6a21\u578b\u3002<\/p>\n

\u641e\u6e05\u695a\u4e86\u4ee5\u4e0a\u6982\u5ff5\u4ee5\u540e\uff0c\u6211\u4eec\u518d\u56de\u8fc7\u5934\u6765\u770b\u770b\uff0cReactor\u6a21\u5f0f\u548cProactor\u6a21\u5f0f\u3002<\/strong><\/p>\n

\uff08\u5176\u5b9e\u963b\u585e\u4e0e\u975e\u963b\u585e\u90fd\u53ef\u4ee5\u7406\u89e3\u4e3a\u540c\u6b65\u8303\u7574\u4e0b\u624d\u6709\u7684\u6982\u5ff5\uff0c\u5bf9\u4e8e\u5f02\u6b65\uff0c\u5c31\u4e0d\u4f1a\u518d\u53bb\u5206\u963b\u585e\u975e\u963b\u585e\u3002\u5bf9\u4e8e\u7528\u6237\u8fdb\u7a0b\uff0c\u63a5\u5230\u5f02\u6b65\u901a\u77e5\u540e\uff0c\u5c31\u76f4\u63a5\u64cd\u4f5c\u8fdb\u7a0b\u7528\u6237\u6001\u7a7a\u95f4\u91cc\u7684\u6570\u636e\u597d\u4e86\u3002\uff09<\/p>\n

\u9996\u5148\u6765\u770b\u770bReactor\u6a21\u5f0f\uff0cReactor\u6a21\u5f0f\u5e94\u7528\u4e8e\u540c\u6b65I\/O\u7684\u573a\u666f\u3002\u6211\u4eec\u5206\u522b\u4ee5\u8bfb\u64cd\u4f5c\u548c\u5199\u64cd\u4f5c\u4e3a\u4f8b\u6765\u770b\u770bReactor\u4e2d\u7684\u5177\u4f53\u6b65\u9aa4\uff1a<\/strong><\/p>\n

\u8bfb\u53d6\u64cd\u4f5c\uff1a<\/p>\n

    \n
  1. \u5e94\u7528\u7a0b\u5e8f\u6ce8\u518c\u8bfb\u5c31\u7eea\u4e8b\u4ef6\u548c\u76f8\u5173\u8054\u7684\u4e8b\u4ef6\u5904\u7406\u5668<\/li>\n<\/ol>\n
      \n
    1. \u4e8b\u4ef6\u5206\u79bb\u5668\u7b49\u5f85\u4e8b\u4ef6\u7684\u53d1\u751f<\/li>\n
    2. \u5f53\u53d1\u751f\u8bfb\u5c31\u7eea\u4e8b\u4ef6\u7684\u65f6\u5019\uff0c\u4e8b\u4ef6\u5206\u79bb\u5668\u8c03\u7528\u7b2c\u4e00\u6b65\u6ce8\u518c\u7684\u4e8b\u4ef6\u5904\u7406\u5668<\/li>\n<\/ol>\n
        \n
      1. \u4e8b\u4ef6\u5904\u7406\u5668\u9996\u5148\u6267\u884c\u5b9e\u9645\u7684\u8bfb\u53d6\u64cd\u4f5c\uff0c\u7136\u540e\u6839\u636e\u8bfb\u53d6\u5230\u7684\u5185\u5bb9\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u5904\u7406<\/li>\n<\/ol>\n

        \u5199\u5165\u64cd\u4f5c\u7c7b\u4f3c\u4e8e\u8bfb\u53d6\u64cd\u4f5c\uff0c\u53ea\u4e0d\u8fc7\u7b2c\u4e00\u6b65\u6ce8\u518c\u7684\u662f\u5199\u5c31\u7eea\u4e8b\u4ef6\u3002<\/p>\n

        \u4e0b\u9762\u6211\u4eec\u6765\u770b\u770bProactor\u6a21\u5f0f\u4e2d\u8bfb\u53d6\u64cd\u4f5c\u548c\u5199\u5165\u64cd\u4f5c\u7684\u8fc7\u7a0b\uff1a<\/strong><\/p>\n

        \u8bfb\u53d6\u64cd\u4f5c\uff1a<\/p>\n

          \n
        1. \u5e94\u7528\u7a0b\u5e8f\u521d\u59cb\u5316\u4e00\u4e2a\u5f02\u6b65\u8bfb\u53d6\u64cd\u4f5c\uff0c\u7136\u540e\u6ce8\u518c\u76f8\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u5668\uff0c\u6b64\u65f6\u4e8b\u4ef6\u5904\u7406\u5668\u4e0d\u5173\u6ce8\u8bfb\u53d6\u5c31\u7eea\u4e8b\u4ef6\uff0c\u800c\u662f\u5173\u6ce8\u8bfb\u53d6\u5b8c\u6210\u4e8b\u4ef6\uff0c\u8fd9\u662f\u533a\u522b\u4e8eReactor\u7684\u5173\u952e\u3002<\/li>\n<\/ol>\n
            \n
          1. \u4e8b\u4ef6\u5206\u79bb\u5668\u7b49\u5f85\u8bfb\u53d6\u64cd\u4f5c\u5b8c\u6210\u4e8b\u4ef6<\/li>\n
          2. \u5728\u4e8b\u4ef6\u5206\u79bb\u5668\u7b49\u5f85\u8bfb\u53d6\u64cd\u4f5c\u5b8c\u6210\u7684\u65f6\u5019\uff0c\u64cd\u4f5c\u7cfb\u7edf\u8c03\u7528\u5185\u6838\u7ebf\u7a0b\u5b8c\u6210\u8bfb\u53d6\u64cd\u4f5c\uff08\u5f02\u6b65IO\u90fd\u662f\u64cd\u4f5c\u7cfb\u7edf\u8d1f\u8d23\u5c06\u6570\u636e\u8bfb\u5199\u5230\u5e94\u7528\u4f20\u9012\u8fdb\u6765\u7684\u7f13\u51b2\u533a\u4f9b\u5e94\u7528\u7a0b\u5e8f\u64cd\u4f5c\uff0c\u64cd\u4f5c\u7cfb\u7edf\u626e\u6f14\u4e86\u91cd\u8981\u89d2\u8272\uff09\uff0c\u5e76\u5c06\u8bfb\u53d6\u7684\u5185\u5bb9\u653e\u5165\u7528\u6237\u4f20\u9012\u8fc7\u6765\u7684\u7f13\u5b58\u533a\u4e2d\u3002\u8fd9\u4e5f\u662f\u533a\u522b\u4e8eReactor\u7684\u4e00\u70b9\uff0cProactor\u4e2d\uff0c\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u4f20\u9012\u7f13\u5b58\u533a\u3002<\/li>\n<\/ol>\n
              \n
            1. \u4e8b\u4ef6\u5206\u79bb\u5668\u6355\u83b7\u5230\u8bfb\u53d6\u5b8c\u6210\u4e8b\u4ef6\u540e\uff0c\u6fc0\u6d3b\u5e94\u7528\u7a0b\u5e8f\u6ce8\u518c\u7684\u4e8b\u4ef6\u5904\u7406\u5668\uff0c\u4e8b\u4ef6\u5904\u7406\u5668\u76f4\u63a5\u4ece\u7f13\u5b58\u533a\u8bfb\u53d6\u6570\u636e\uff0c\u800c\u4e0d\u9700\u8981\u8fdb\u884c\u5b9e\u9645\u7684\u8bfb\u53d6\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n

              Proactor\u4e2d\u5199\u5165\u64cd\u4f5c\u548c\u8bfb\u53d6\u64cd\u4f5c\uff0c\u53ea\u4e0d\u8fc7\u611f\u5174\u8da3\u7684\u4e8b\u4ef6\u662f\u5199\u5165\u5b8c\u6210\u4e8b\u4ef6\u3002<\/p>\n

              \u4ece\u4e0a\u9762\u53ef\u4ee5\u770b\u51fa\uff0cReactor\u548cProactor\u6a21\u5f0f\u7684\u4e3b\u8981\u533a\u522b\u5c31\u662f\u771f\u6b63\u7684\u8bfb\u53d6\u548c\u5199\u5165\u64cd\u4f5c\u662f\u6709\u8c01\u6765\u5b8c\u6210\u7684\uff0cReactor\u4e2d\u9700\u8981\u5e94\u7528\u7a0b\u5e8f\u81ea\u5df1\u8bfb\u53d6\u6216\u8005\u5199\u5165\u6570\u636e\uff0c\u800cProactor\u6a21\u5f0f\u4e2d\uff0c\u5e94\u7528\u7a0b\u5e8f\u4e0d\u9700\u8981\u8fdb\u884c\u5b9e\u9645\u7684\u8bfb\u5199\u8fc7\u7a0b\uff0c\u5b83\u53ea\u9700\u8981\u4ece\u7f13\u5b58\u533a\u8bfb\u53d6\u6216\u8005\u5199\u5165\u5373\u53ef\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u8bfb\u53d6\u7f13\u5b58\u533a\u6216\u8005\u5199\u5165\u7f13\u5b58\u533a\u5230\u771f\u6b63\u7684IO\u8bbe\u5907.<\/p>\n

              \u7efc\u4e0a\u6240\u8ff0\uff0c\u540c\u6b65\u548c\u5f02\u6b65\u662f\u76f8\u5bf9\u4e8e\u5e94\u7528\u548c\u5185\u6838\u7684\u4ea4\u4e92\u65b9\u5f0f\u800c\u8a00\u7684\uff0c\u540c\u6b65\u9700\u8981\u4e3b\u52a8\u53bb\u8be2\u95ee\uff0c\u800c\u5f02\u6b65\u7684\u65f6\u5019\u5185\u6838\u5728IO\u4e8b\u4ef6\u53d1\u751f\u7684\u65f6\u5019\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\uff0c\u800c\u963b\u585e\u548c\u975e\u963b\u585e\u4ec5\u4ec5\u662f\u7cfb\u7edf\u5728\u8c03\u7528\u7cfb\u7edf\u8c03\u7528\u7684\u65f6\u5019\u51fd\u6570\u7684\u5b9e\u73b0\u65b9\u5f0f\u800c\u5df2\u3002<\/p>\n

              \n

              \u8bf4\u5230\u963b\u585e\uff0c\u9996\u5148\u5f97\u8bf4\u8bf4I\/O\u7b49\u5f85\u3002I\/O\u7b49\u5f85\u662f\u4e0d\u53ef\u907f\u514d\u7684\uff0c\u90a3\u4e48\u65e2\u7136\u6709\u4e86\u7b49\u5f85\uff0c\u5c31\u4f1a\u6709\u963b\u585e\uff0c\u4f46\u662f\u6ce8\u610f\uff0c\u6211\u4eec\u8bf4\u7684\u963b\u585e\u662f\u6307\u5f53\u524d\u53d1\u8d77I\/O\u64cd\u4f5c\u7684\u8fdb\u7a0b\u88ab\u963b\u585e\u3002\u540c\u6b65\u963b\u585eI\/O\u4fbf\u662f\u6307\uff0c\u5f53\u8fdb\u7a0b\u8c03\u7528\u67d0\u4e9b\u6d89\u53caI\/O\u64cd\u4f5c\u7684\u7cfb\u7edf\u8c03\u7528\u6216\u5e93\u51fd\u6570\u65f6\uff0c\u6bd4\u5982accept()(\u6ce8\u610faccept\u4e5f\u7b97\u5728\u4e86i\/o\u64cd\u4f5c)\u3001send()\u3001recv()\u7b49\uff0c\u8fdb\u7a0b\u4fbf\u6682\u505c\u4e0b\u6765\uff0c\u7b49\u5f85I\/O\u64cd\u4f5c\u5b8c\u6210\u518d\u7ee7\u7eed\u8fd0\u884c\u3002\u8fd9\u662f\u4e00\u79cd\u7b80\u5355\u800c\u6709\u6548\u7684I\/O\u6a21\u578b\uff0c\u5b83\u53ef\u4ee5\u548c\u591a\u8fdb\u7a0b\u7ed3\u5408\u8d77\u6765\u6709\u6548\u7684\u5229\u7528CPU\u8d44\u6e90\uff0c\u4f46\u662f\u4ee3\u4ef7\u5c31\u662f\u591a\u8fdb\u7a0b\u7684\u5927\u91cf\u5185\u5b58\u5f00\u9500\u3002<\/p>\n

              \u540c\u6b65\u963b\u585e\uff1a\u8fdb\u7a0b\u5750\u6c34,\u5c31\u4e0d\u80fd\u70e7\u7ca5 \u540c\u6b65\u975e\u963b\u585e\uff1a\u7c7b\u4f3c\u4e8e\u7528\u4e00\u4e2a\u8fdb\u7a0b\u5750\u6c34\uff0c\u70e7\u7ca5\u3002while(true){if\u2026 if\u2026 }
              \n\u597d\u5904\u5c31\u662f\u4e00\u4e2a\u8fdb\u7a0b\u5904\u7406\u591a\u4e2ai\/o\u8bf7\u6c42\uff0c\u52a3\u52bf\u5c31\u662f\u9700\u8981\u4e0d\u505c\u7684\u8f6e\u8be2\u3002<\/p>\n

              \u533a\u522b\u5728\u4e8e\u7b49\u4e0d\u7b49\u5f85\u6570\u636e\u5c31\u7eea\u3002\u56e0\u4e3a\u6570\u636e\u5360\u4e86\u7b49\u5f85\u768480%\u65f6\u95f4\u3002\u540c\u6b65\u975e\u963b\u585e\u7684\u4f18\u52bf\u5c31\u662f\u4e00\u4e2a\u8fdb\u7a0b\u91cc\u540c\u65f6\u5904\u7406\u591a\u4e2aI\/O\u64cd\u4f5c\u3002<\/p>\n

              \u5728\u540c\u6b65\u963b\u585eI\/O\u4e2d\uff0c\u8fdb\u7a0b\u5b9e\u9645\u4e0a\u7b49\u5f85\u7684\u65f6\u95f4\u53ef\u80fd\u5305\u62ec\u4e24\u90e8\u5206\uff0c\u4e00\u4e2a\u662f\u7b49\u5f85\u6570\u636e\u7684\u5c31\u7eea\uff0c\u53e6\u4e00\u4e2a\u662f\u7b49\u5f85\u6570\u636e\u7684\u590d\u5236\uff0c\u5bf9\u4e8e\u7f51\u7edcI\/O\u6765\u8bf4\uff0c\u524d\u8005\u7684\u65f6\u95f4\u53ef\u80fd\u8981\u66f4\u957f\u4e00\u4e9b\u3002
              \n\u4e0e\u6b64\u4e0d\u540c\u7684\u662f,\u540c\u6b65\u975e\u963b\u585eI\/O\u7684\u8c03\u7528\u4e0d\u4f1a\u7b49\u5f85\u6570\u636e\u7684\u5c31\u7eea\uff0c\u5982\u679c\u6570\u636e\u4e0d\u53ef\u8bfb\u6216\u8005\u4e0d\u53ef\u5199\uff0c\u5b83\u4f1a\u7acb\u5373\u8fd4\u56de\u544a\u8bc9\u8fdb\u7a0b\u3002<\/p>\n

              \u6bd4\u5982\u6211\u4eec\u4f7f\u7528\u975e\u963b\u585erecv()\u63a5\u6536\u7f51\u7edc\u6570\u636e\u7684\u65f6\u5019\uff0c\u5982\u679c\u7f51\u5361\u7f13\u51b2\u533a\u4e2d\u6ca1\u6709\u53ef\u63a5\u6536\u7684\u6570\u636e\uff0c\u51fd\u6570\u5c31\u53ca\u65f6\u8fd4\u56de\uff0c\u544a\u8bc9\u8fdb\u7a0b\u6ca1\u6709\u6570\u636e\u53ef\u8bfb\u4e86\u3002\u76f8\u6bd4\u4e8e\u963b\u585eI\/O\uff0c\u8fd9\u79cd\u975e\u963b\u585eI\/O\u7ed3\u5408\u53cd\u590d\u7684\u8f6e\u8be2\u6765\u5c1d\u8bd5\u6570\u636e\u662f\u5426\u5c31\u7eea\uff0c\u9632\u6b62\u8fdb\u7a0b\u88ab\u963b\u585e\uff0c\u6700\u5927\u7684\u597d\u5904\u4fbf\u5728\u4e8e\u53ef\u4ee5\u5728\u4e00\u4e2a\u8fdb\u7a0b\u91cc\u540c\u65f6\u5904\u7406\u591a\u4e2aI\/O\u64cd\u4f5c\u3002\u4f46\u6b63\u662f\u7531\u4e8e\u9700\u8981\u8fdb\u7a0b\u6267\u884c\u591a\u6b21\u7684\u8f6e\u8be2\u6765\u67e5\u770b\u6570\u636e\u662f\u5426\u5c31\u7eea\uff0c\u8fd9\u82b1\u8d39\u4e86\u5927\u91cf\u7684CPU\u65f6\u95f4\uff0c\u4f7f\u5f97\u8fdb\u7a0b\u5904\u4e8e\u5fd9\u788c\u7b49\u5f85\u72b6\u6001\u3002<\/p>\n

              \u975e\u963b\u585eI\/O\u4e00\u822c\u53ea\u9488\u5bf9\u7f51\u7edcI\/O\u6709\u6548\uff0c\u6211\u4eec\u53ea\u8981\u5728socket\u7684\u9009\u9879\u8bbe\u7f6e\u4e2d\u4f7f\u7528O_NONBLOCK\u5373\u53ef\uff0c\u8fd9\u6837\u5bf9\u4e8e\u8be5socket\u7684send()\u6216recv()\u4fbf\u91c7\u7528\u975e\u963b\u585e\u65b9\u5f0f\u3002\u5982\u679c\u670d\u52a1\u5668\u60f3\u8981\u540c\u65f6\u63a5\u6536\u591a\u4e2aTCP\u8fde\u63a5\u7684\u6570\u636e\uff0c\u5c31\u5fc5\u987b\u8f6e\u6d41\u5bf9\u6bcf\u4e2asocket\u8c03\u7528\u63a5\u6536\u6570\u636e\u7684\u65b9\u6cd5\uff0c\u6bd4\u5982recv()\u3002\u4e0d\u7ba1\u8fd9\u4e9bsocket\u6709\u6ca1\u6709\u53ef\u4ee5\u63a5\u6536\u7684\u6570\u636e\uff0c\u90fd\u8981\u8be2\u95ee\u4e00\u904d\uff0c\u5047\u5982\u5927\u90e8\u5206socket\u5e76\u6ca1\u6709\u6570\u636e\u53ef\u4ee5\u63a5\u6536\uff0c\u90a3\u4e48\u8fdb\u7a0b\u4fbf\u4f1a\u6d6a\u8d39\u5f88\u591aCPU\u65f6\u95f4\u7528\u4e8e\u68c0\u67e5\u8fd9\u4e9bsocket\uff0c\u8fd9\u663e\u7136\u4e0d\u662f\u6211\u4eec\u6240\u5e0c\u671b\u770b\u5230\u7684\u3002<\/p>\n

              \u540c\u6b65\u548c\u5f02\u6b65\uff0c\u963b\u585e\u548c\u975e\u963b\u585e\uff0c\u6709\u4e9b\u6df7\u7528\uff0c\u5176\u5b9e\u5b83\u4eec\u5b8c\u5168\u4e0d\u662f\u4e00\u56de\u4e8b\uff0c\u800c\u4e14\u5b83\u4eec\u4fee\u9970\u7684\u5bf9\u8c61\u4e5f\u4e0d\u76f8\u540c\u3002\u963b\u585e\u548c\u975e\u963b\u585e\u662f\u6307\u5f53\u8fdb\u7a0b\u8bbf\u95ee\u7684\u6570\u636e\u5982\u679c\u5c1a\u672a\u5c31\u7eea\uff0c\u8fdb\u7a0b\u662f\u5426\u9700\u8981\u7b49\u5f85\uff0c\u7b80\u5355\u8bf4\u8fd9\u76f8\u5f53\u4e8e\u51fd\u6570\u5185\u90e8\u7684\u5b9e\u73b0\u533a\u522b\uff0c\u4e5f\u5c31\u662f\u672a\u5c31\u7eea\u65f6\u662f\u76f4\u63a5\u8fd4\u56de\u8fd8\u662f\u7b49\u5f85\u5c31\u7eea\uff1b\u800c\u540c\u6b65\u548c\u5f02\u6b65\u662f\u6307\u8bbf\u95ee\u6570\u636e\u7684\u673a\u5236\uff0c\u540c\u6b65\u4e00\u822c\u6307\u4e3b\u52a8\u8bf7\u6c42\u5e76\u7b49\u5f85I\/O\u64cd\u4f5c\u5b8c\u6bd5\u7684\u65b9\u5f0f\uff0c\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\uff0c\u540c\u6b65\u7684\u8bfb\u5199\u5fc5\u987b\u963b\u585e)\uff0c\u5f02\u6b65\u5219\u6307\u4e3b\u52a8\u8bf7\u6c42\u6570\u636e\u540e\u4fbf\u53ef\u4ee5\u7ee7\u7eed\u5904\u7406\u5176\u5b83\u4efb\u52a1\uff0c\u968f\u540e\u7b49\u5f85I\/O\uff0c\u64cd\u4f5c\u5b8c\u6bd5\u7684\u901a\u77e5\uff0c\u8fd9\u53ef\u4ee5\u4f7f\u8fdb\u7a0b\u5728\u6570\u636e\u8bfb\u5199\u65f6\u4e5f\u4e0d\u963b\u585e\u3002(\u7b49\u5f85\u201d\u901a\u77e5\u201d)<\/p>\n

              \u591a\u6570\u60c5\u51b5\u4e0b\uff0cWeb\u670d\u52a1\u5668\u5bf9\u8fd9\u4e9b\u8bf7\u6c42\u91c7\u7528\u57fa\u4e8e\u961f\u5217\u7684\u81ea\u7531\u7ade\u4e89\uff0c\u901a\u8fc7\u591a\u6267\u884c\u6d41(\u591a\u8fdb\u7a0b\u6216\u591a\u7ebf\u7a0b)\u6765\u5145\u5206\u5360 \u7528CPU\u4ee5\u53caI\/O\u8d44\u6e90\uff0c\u51cf\u5c11\u4efb\u4f55\u65e0\u8f9c\u7684\u7b49\u5f85\u65f6\u95f4\uff0c\u8fd9\u5176\u4e2d\u5305\u62ec\u4e86\u5f88\u591a\u79cd\u5177\u4f53\u5b9e\u73b0\u7684\u5e76\u53d1\u7b56\u7565\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u7279\u522b\u662fWeb\u670d\u52a1\u5668\uff0c\u540c\u65f6\u5904\u7406\u5927\u91cf\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u591a\u8defI\/O\u5c31\u7eea\u901a\u77e5\u7684\u51fa\u73b0\uff0c\u63d0\u4f9b\u4e86\u5bf9\u5927\u91cf\u6587\u4ef6\u63cf\u8ff0\u7b26\u5c31\u7eea\u68c0\u67e5\u7684\u9ad8\u6027\u80fd\u65b9\u6848\uff0c\u5b83\u5141\u8bb8\u8fdb\u7a0b(\u6bd4\u5982\u7535\u5b50\u5c4f,\u4f1a\u95fb\u5230\u5404\u4e2a\u996d\u9986\u505a\u597d\u996d\u83dc\u7684\u5473\u9053)\u901a\u8fc7\u4e00\u79cd\u65b9\u6cd5\u6765\u540c\u65f6\u76d1\u89c6\u6240\u6709\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u5e76\u53ef\u4ee5\u5feb\u901f\u83b7\u5f97\u6240\u6709\u5c31\u7eea\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u7136\u540e\u53ea\u9488\u5bf9\u8fd9\u4e9b\u6587\u4ef6\u63cf\u8ff0\u7b26\u8fdb\u884c\u6570\u636e\u8bbf\u95ee\u3002<\/p>\n

              \u56de\u5230\u4e70\u9762\u6761\u7684\u6545\u4e8b\u4e2d\uff0c\u5047\u5982\u4f60\u4e0d\u6b62\u4e70\u4e86\u4e00\u4efd\u9762\u6761\uff0c\u8fd8\u5728\u5176\u5b83\u51e0\u4e2a\u5c0f\u5403\u5e97\u4e70\u4e86\u997a\u5b50\u3001\u7ca5\u3001\u9985\u997c\u7b49\uff0c\u56e0\u4e3a\u4e00\u8d77\u901b\u8857\u7684\u670b\u53cb\u770b\u5230\u4f60\u7684\u9762\u6761\u540e\u4e5f\u997f\u4e86\u3002\u8fd9\u4e9b\u4e1c\u897f\u90fd\u9700\u8981\u65f6\u95f4\u6765\u7b49\u5f85\u5236\u4f5c\u3002\u5728\u540c\u6b65\u975e\u963b\u585eI\/O\u6a21\u578b\u4e2d\uff0c\u4f60\u8981\u8f6e\u6d41\u4e0d\u505c\u7684\u53bb\u5404\u4e2a\u5c0f\u5403\u5e97\u8be2\u95ee\u8fdb\u5ea6\uff0c\u75db\u82e6\u4e0d\u582a\u3002\u73b0\u5728\u5f15\u5165\u591a\u8defI\/O\u5c31\u7eea\u901a\u77e5\u540e\uff0c\u5c0f\u5403\u57ce\u7ba1\u7406\u5904\u7ed9\u5927\u5385\u5b89\u88c5\u4e86\u4e00\u5757\u7535\u5b50\u5c4f\u5e55,\u4ee5\u540e\u6240\u6709\u5c0f\u5403\u5e97\u7684\u98df\u7269\u505a\u597d\u540e\uff0c\u90fd\u4f1a\u663e\u793a\u5728\u5c4f\u5e55\u4e0a\uff0c\u8fd9\u53ef\u771f\u662f\u4e2a\u597d\u6d88\u606f\uff0c\u4f60\u53ea\u9700\u8981\u95f4\u9694\u6027\u7684\u770b\u770b\u5927\u5c4f\u5e55\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e5f\u8bb8\u4f60\u8fd8\u53ef\u4ee5\u540c\u65f6\u901b\u901b\u9644\u8fd1\u7684\u5546\u5e97\uff0c\u5728\u4e0d\u8fdc\u5904\u4e5f\u53ef\u4ee5\u770b\u5230\u5927\u5c4f\u5e55\u3002<\/p>\n

              \u591a\u8def\u5c31\u7eea\uff1a1\u3001\u5f3a\u8c03\u591a\u8def\uff1b 2\u3001\u53ea\u9488\u5bf9\u8bf7\u6c42\u6570\u636e\u662f\u5426\u5c31\u7eea\uff0c\u4e0d\u9488\u5bf9I\/O\u8bfb\u5199\u3002epoll\u9488\u5bf9\u7684\u662f\u8fd9\u6837\u7684\u573a\u666f\u3002select, epoll\u90fd\u53ea\u9700\u8981\u8fdb\u7a0b(\u6211)\u88ab\u52a8\u63a5\u6536\u5230\u6570\u636e\u5c31\u7eea(\u9762\u6761)\u201d\u901a\u77e5\u201d\uff0c\u7b26\u5408\u5f02\u6b65\u7684\u5b9a\u4e49\u3002 \u4e0d\u9700\u8981\u4e00\u76f4\u5728\u996d\u9986\u7b49(\u540c\u6b65\u963b\u585e)\uff0c\u6216\u8f6e\u8be2(\u540c\u6b65\u975e\u963b\u585e)\u3002<\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

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