{"id":640,"date":"2018-03-14T09:44:40","date_gmt":"2018-03-14T01:44:40","guid":{"rendered":"http:\/\/blog.sorayuki.net\/?p=640"},"modified":"2018-03-15T21:03:09","modified_gmt":"2018-03-15T13:03:09","slug":"%e7%ba%bf%e7%a8%8b%e8%b0%83%e5%ba%a6%e5%92%8cio%e5%a4%9a%e8%b7%af%e5%a4%8d%e7%94%a8","status":"publish","type":"post","link":"https:\/\/blog.sorayuki.net\/?p=640","title":{"rendered":"\u7ebf\u7a0b\u8c03\u5ea6\u548cIO\u591a\u8def\u590d\u7528\u6742\u8c08"},"content":{"rendered":"

\u505a\u7f51\u7edc\u7f16\u7a0b\u7684\u8bdd\uff0c\u7ecf\u5e38\u4f1a\u542c\u5230\u4ec0\u4e48epoll\uff08linux\u4e0b\uff09\u3001kqueue\uff08bsd\u548c\u82f9\u679c\u4e0b\uff09\u3001io\u5b8c\u6210\u7aef\u53e3\uff08windows\u4e0b\uff09\u8fd9\u6837\u7684\u540d\u8bcd\uff0c\u4e5f\u8bb8\u770b\u4e86\u7f51\u4e0a\u7684\u8d44\u6599\u4e5f\u77e5\u9053\u7528\u6cd5\u662f\u4ec0\u4e48\u6837\u7684\uff0c\u4f46\u662f\u5374\u5bf9\u4e3a\u4ec0\u4e48\u8fd9\u6837\u505a\u6ca1\u6709\u5f88\u611f\u6027\u7684\u8ba4\u8bc6\u3002\u6211\u5728\u5c1d\u8bd5\u8bbe\u8ba1\u4e00\u4e2a\u5b9e\u9a8c\u80fd\u591f\u4ece\u7ebf\u7a0b\u8c03\u5ea6\u7684\u89d2\u5ea6\u6765\u5bf9\u8fd9\u4e2a\u4e8b\u60c5\u6709\u76f4\u89c2\u8ba4\u8bc6\uff0c\u73b0\u5728\u52c9\u5f3a\u4e5f\u80fd\u7b97\u662f\u641e\u51fa\u6765\u4e86\uff0c\u6240\u4ee5\u5199\u4e00\u7bc7\u8bb2\u8bb2\u662f\u505a\u4e86\u4ec0\u4e48\u3002<\/p>\n

<\/p>\n

1. \u7ebf\u7a0b<\/h1>\n

\u7ebf\u7a0b\u7684\u4e8b\u60c5\u8981\u4eceCPU\u5f00\u59cb\u8bf4\u8d77\u3002CPU\u53ef\u4ee5\u6267\u884c\u7a0b\u5e8f\u4ee3\u7801\uff0c\u6211\u62ffC\u8bed\u8a00\u5199\u7684\u8ba1\u7b97\u4e24\u4e2a\u6570\u7684\u548c\u7684\u7a0b\u5e8f\u4e3e\u4f8b\u5b50\uff1a<\/p>\n

int a, b;
\nscanf(\"%d%d\", &a, &b);
\nprintf(\"%d\", a + b);<\/p>\n

\u8fd9\u4e2a\u7a0b\u5e8f\u5b66\u8fc7C\u8bed\u8a00\u7684\u4eba\u5927\u4f53\u4e0a\u662f\u90fd\u5199\u8fc7\u7684\u3002\u4e0d\u8bf4\u592a\u590d\u6742\u7684\uff0c\u6211\u7701\u7565\u6389\u7ec6\u8282\u8bf4\uff0c\u90a3\u4e48\u5c31\u662fCPU\u4f1a\u4e00\u884c\u4e00\u884c\u4ee3\u7801\u6267\u884c\u4e0b\u6765\uff1a\u9996\u5148\u7ed9\u53d8\u91cf a \u548c b \u5206\u914d\u7a7a\u95f4\uff0c\u7136\u540e\u8c03\u7528 scanf \u4ece\u952e\u76d8\u83b7\u53d6\u8f93\u5165\u7684\u6570\u5b57\uff0c\u7136\u540e\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u548c\uff0c\u5e76\u4e14\u663e\u793a\u51fa\u6765\u3002<\/p>\n

\u4f46\u662f\u8fd9\u4e48\u4e00\u53f0\u7535\u8111\uff0c\u53ea\u62ff\u6765\u5e72\u8fd9\u79cd\u4e8b\u60c5\uff0c\u5b9e\u5728\u662f\u5f88\u4e0d\u5408\u7b97\u3002CPU\u90a3\u4e48\u5feb\uff0c\u5206\u914d\u5b8c\u53d8\u91cf a \u548c b \u7684\u7a7a\u95f4\u4ee5\u540e\u5c31\u5750\u90a3\u8fb9\u7b49\uff0c\u7b49\u4f60\u8f93\u5165\u5b8c\u6570\u5b57\u518d\u77ac\u95f4\u7b97\u5b8c\u663e\u793a\u51fa\u6765\uff0c\u975e\u5e38\u975e\u5e38\u5927\u91cf\u7684\u65f6\u95f4\u90fd\u82b1\u5728\u201c\u7b49\u201d\u4e0a\u9762\u4e86\u3002\u8fd9\u4e48\u7528\u7535\u8111\uff0c\u5b9e\u5728\u662f\u5f88\u6d6a\u8d39\u3002\u4e0d\u5e94\u8be5\u4e0d\u5e94\u8be5\u3002<\/p>\n

\u7136\u540e\u73b0\u5728\u8981\u8bf4\u5230\u591a\u7ebf\u7a0b\u3002\u4e66\u672c\u4e0a\u8bf4\u5230\u591a\u7ebf\u7a0b\u7684\u65f6\u5019\uff0c\u65f6\u5e38\u7231\u62ff\u51fa\u6765\u8bf4\u7684\u4e00\u4e2a\u4f8b\u5b50\u662f\u4f60\u53ef\u4ee5\u62ff\u7535\u8111\u4e00\u8fb9\u542c\u6b4c\u4e00\u8fb9\u5199\u62a5\u544a\u3002\u73b0\u5728\u8fd8\u662f\u62ff\u4e2a\u7b80\u5316\u7684\u6a21\u578b\u6765\u8003\u8651\uff0c\u8003\u8651\u542c\u6b4c\u7684\u65f6\u5019\u7535\u8111\u5728\u5e72\u4ec0\u4e48\uff0c\u8003\u8651\u5199\u62a5\u544a\u7684\u65f6\u5019\u7535\u8111\u5728\u5e72\u4ec0\u4e48\u3002
\n\u5bf9\u4e8e\u542c\u6b4c\u6765\u8bf4\uff0c\u7535\u8111\u505a\u7684\u4e8b\u60c5\u5176\u5b9e\u5f88\u7b80\u5355\uff1a\u4ece\u786c\u76d8\u4e2d\u628aMP3\u8bfb\u51fa\u6765\uff0c\u89e3\u7801\u6210\u58f0\u5361\u80fd\u8bc6\u522b\u7684\u683c\u5f0f\uff0c\u628a\u6570\u636e\u4f20\u5230\u58f0\u5361\u4e0a\uff1b\u8fd9\u4e00\u5c0f\u6bb5\u653e\u5b8c\u4ee5\u540e\uff0c\u91cd\u590d\u6267\u884c\u8fd9\u4e2a\u6b65\u9aa4\uff0c\u4f20\u4e0b\u4e00\u4e2a\u5c0f\u6bb5\u3002\u56e0\u4e3a\u7535\u8111\u8bfbMP3\u5e76\u4e14\u89e3\u7801\u7684\u901f\u5ea6\u662f\u8fdc\u8fdc\u5927\u4e8e\u58f0\u5361\u64ad\u653e\u58f0\u97f3\u7684\u901f\u5ea6\u7684\uff08\u64ad\u653e\u5feb\u4e86\u8fd8\u80fd\u542c\u5417\uff1f\uff09\uff0c\u6240\u4ee5\u7535\u8111\u5927\u90e8\u5206\u65f6\u95f4\u8fd8\u662f\u7a7a\u95f2\u7684\u3002
\n\u518d\u8bf4\u5199\u62a5\u544a\uff0c\u5982\u679c\u4f60\u6ca1\u6709\u5728\u5f80\u91cc\u9762\u6253\u5b57\u7684\u8bdd\uff0c\u7535\u8111\u5728\u5e72\u5565\uff1f\u7535\u8111\u5728\u7b97\u65f6\u95f4\uff0c\u65f6\u95f4\u5dee\u4e0d\u591a\u5230\u4e86\u628a\u8f93\u5165\u5149\u6807\u9690\u85cf\u8d77\u6765\uff0c\u7b49\u65f6\u95f4\u5dee\u4e0d\u591a\u5230\u4e86\u518d\u628a\u8f93\u5165\u5149\u6807\u663e\u793a\u51fa\u6765\uff0c\u7136\u540e\u4f60\u5c31\u770b\u5230\u5149\u6807\u5728\u95ea\uff1a\u663e\u793a\u548c\u9690\u85cf\u5149\u6807\u5176\u5b9e\u6839\u672c\u82b1\u4e0d\u4e86\u591a\u5c11\u65f6\u95f4\uff0c\u7535\u8111\u5927\u90e8\u5206\u65f6\u95f4\u82b1\u5728\u201c\u7b49\u201d\u4e0a\u9762\u3002\u90a3\u4e48\u4f60\u5728\u6253\u5b57\u7684\u65f6\u5019\u5462\uff1f\u5c31\u7b97\u4e00\u5206\u949f\u80fd\u6572300\u4e2a\u6309\u952e\uff0c\u6bcf\u4e2a\u6309\u952e\u5e73\u5747\u4e5f\u5c3120\u6beb\u79d2\uff0c\u8f93\u5165\u6cd5\u5bf9\u4e00\u4e2a\u6309\u952e\u7684\u53cd\u5e94\u65f6\u95f4\u4e0d\u8981\u90a3\u4e48\u4e45\uff0c\u7ed3\u679c\u5927\u90e8\u5206\u65f6\u95f4\u8fd8\u662f\u5728\u7b49\u4f60\u6309\u952e\u3002
\n\u73b0\u5728\u628a\u4e09\u4ef6\u4e8b\u60c5\u5408\u8d77\u6765\uff0c\u7535\u8111\u9700\u8981\u7b49\u58f0\u5361\u64ad\u653e\u5b8c\u3001\u9700\u8981\u7b49\u65f6\u95f4\u5230\u4e86\u53bb\u95ea\u5149\u6807\u3001\u9700\u8981\u7b49\u4f60\u6309\u952e\u8f93\u5165\uff0c\u5168\u90fd\u5728\u7b49\u3002\u6240\u4ee5\u5b83\u5728\u7b49\u58f0\u5361\u64ad\u653e\u5b8c\u4e4b\u524d\u53ef\u4ee5\u5904\u7406\u4f60\u6309\u952e\u7684\u4e8b\u60c5\uff0c\u53ef\u4ee5\u5904\u7406\u5149\u6807\u95ea\u7684\u4e8b\u60c5\uff0c\u7535\u8111\u53ef\u4ee5\u540c\u65f6\u5e72\u5f88\u591a\u4e8b\u3002<\/p>\n

2. \u7ebf\u7a0b\u8c03\u5ea6<\/h1>\n

\u7535\u8111\u867d\u7136\u80fd\u50cf\u4e0a\u9762\u8bf4\u7684\u90a3\u6837\u540c\u65f6\u5e72\u5f88\u591a\u4e8b\uff0c\u4f46\u662f\u7535\u8111\u7cfb\u7edf\u5e76\u4e0d\u80fd\u5b8c\u5168\u6309\u7167\u8fd9\u6837\u505a\u3002\u4e00\u4e2a\u5199\u62a5\u544a\u7684\u8f6f\u4ef6\uff0c\u5728\u4f60\u4e5f\u4e0d\u8f93\u5165\u5149\u6807\u4e5f\u4e0d\u95ea\u7684\u65f6\u5019\u53ef\u4ee5\u544a\u8bc9\u7cfb\u7edf\u201c\u6211\u73b0\u5728\u6ca1\u6709\u8981\u505a\u7684\u4e8b\u60c5\u4e86\u201d\uff0c\u4f46\u662f\u5982\u679c\u5f00\u53d1\u8f6f\u4ef6\u7684\u4eba\u505a\u5f97\u4e0d\u597d\uff0c\u5fd8\u8bb0\u544a\u8bc9\u4e86\u6216\u8005\u600e\u4e48\u7684\uff0c\u8fd9\u7535\u8111\u53ef\u80fd\u5c31\u5361\u6b7b\u5728\u8fd9\u91cc\u9762\u6ca1\u6709\u673a\u4f1a\u5e72\u5176\u4ed6\u4e8b\u4e86\u3002\u6240\u4ee5\u7cfb\u7edf\u4e0d\u80fd\u8fd9\u6837\u5e72\uff0c\u6bd4\u5982\u4f60\u73b0\u5728\u8981\u5728CPU\u4e0a\u6267\u884c\u7a0b\u5e8f\uff0c\u7cfb\u7edf\u4f1a\u5206\u914d\u7ed9\u4f60\u4e00\u5c0f\u6bb5\u65f6\u95f4\uff0c\u4f60\u53ef\u4ee5\u7528CPU\u8fd9\u4e48\u4e00\u6bb5\u65f6\u95f4\uff0c\u5982\u679c\u65f6\u95f4\u5230\u4e86\u4f60\u8fd8\u6ca1\u544a\u8bc9\u7cfb\u7edf\u201c\u6211\u73b0\u5728\u6682\u65f6\u5e72\u5b8c\u4e8b\u4e86\u201d\uff0c\u7cfb\u7edf\u4e5f\u4f1a\u5f3a\u884c\u4e0d\u8ba9\u4f60\u7ee7\u7eed\u8fd0\u884c\uff0c\u5b83\u4f1a\u628a\u4f60\u4eceCPU\u91cc\u62fd\u51fa\u6765\uff0c\u7136\u540e\u653e\u53e6\u4e00\u4e2a\u8981\u7528CPU\u7684\u8fdb\u53bb\uff1b\u53ea\u6709\u8bf4\u627e\u4e0d\u5230\u4ec0\u4e48\u7a0b\u5e8f\u8981\u7528CPU\u4e86\uff0c\u624d\u4f1a\u8ba9\u4f60\u7ee7\u7eed\u7528\u3002<\/p>\n

\u8fd9\u79cd\u4f1a\u628a\u4f60\u62fd\u51fa\u6765\u7684\u65b9\u5f0f\u53eb\u505a\u201c\u62a2\u5360\u5f0f\u591a\u7ebf\u7a0b\u201d\uff1b\u800c\u8fd9\u79cd\u4f60\u53ef\u4ee5\u62b1\u7740CPU\u4e00\u76f4\u7528\u5230\u4f60\u89c9\u5f97\u6682\u65f6\u7528\u5b8c\u4e86\uff0c\u6bd4\u5982\u4e0a\u9762\u7b97\u52a0\u6cd5\u7684C\u7a0b\u5e8f\uff0c\u6267\u884c\u5230scanf\u7684\u65f6\u5019\u7528\u6237\u6ca1\u8f93\u5165\uff0c\u90a3\u4e5f\u5c31\u662f\u201c\u6682\u65f6\u7528\u5b8c\u4e86\u201d\uff1a\u8981\u7b49\u7528\u6237\u8f93\u5165\u4e86\u624d\u80fd\u7ee7\u7eed\u7528CPU\uff0c\u8fd9\u6837\u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u53eb\u505a\u975e\u62a2\u5360\u5f0f\u591a\u7ebf\u7a0b\u3002Windows\u3001Linux\u6216\u8005\u82f9\u679c\u8fd9\u6837\u7684\u7cfb\u7edf\uff0c\u90fd\u7528\u7684\u62a2\u5360\u5f0f\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\uff0c\u8fd9\u6837\u624d\u4e0d\u4f1a\u56e0\u4e3a\u6709\u4e00\u4e2a\u7a0b\u5e8f\u5199\u5f97\u4e0d\u592a\u597d\uff0c\u62b1\u7740CPU\u4e0d\u653e\uff0c\u5bfc\u81f4\u6574\u4e2a\u7cfb\u7edf\u90fd\u6ca1\u6cd5\u7528\u3002<\/p>\n

3. \u7ebf\u7a0b\u5207\u6362<\/h1>\n

\u7cfb\u7edf\u8981\u5f3a\u884c\u628a\u4e00\u4e2a\u6b63\u5728\u6267\u884c\u7684\u7a0b\u5e8f\u4eceCPU\u91cc\u62d6\u51fa\u6765\uff0c\u5c31\u4e5f\u8981\u4fdd\u8bc1\u4e0b\u6b21\u628a\u8fd9\u4e2a\u7a0b\u5e8f\u518d\u653eCPU\u91cc\u53bb\u7684\u65f6\u5019\u5b83\u80fd\u7ee7\u7eed\u8fd9\u4e48\u6267\u884c\u3002\u7cfb\u7edf\u5728\u628a\u7a0b\u5e8f\u4eceCPU\u91cc\u62d6\u51fa\u6765\u7684\u65f6\u5019\u4f1a\u4fdd\u5b58\u7a0b\u5e8f\u7684\u4e00\u7cfb\u5217\u4fe1\u606f\uff0c\u6bd4\u5982\u6267\u884c\u5230\u54ea\u91cc\u4e86\u3001\u662f\u901a\u8fc7\u8c03\u7528\u4e86\u591a\u5c11\u51fd\u6570\u6267\u884c\u5230\u8fd9\u4e2a\u4f4d\u7f6e\u7684\u3001\u6267\u884c\u5230\u8fd9\u8fb9\u7684\u65f6\u5019\u5404\u79cd\u53d8\u91cf\u7684\u503c\u662f\u591a\u5c11\u3001\u7b97\u4e00\u534a\u7684\u90a3\u4e9b\u4e1c\u897f\u653e\u5728\u5bc4\u5b58\u5668\u91cc\u7684\u503c\u662f\u591a\u5c11\uff0c\u8fd9\u7c7b\u3002\u8fd9\u4e9b\u4e1c\u897f\u90fd\u4fdd\u5b58\u597d\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u628a\u53e6\u4e00\u4e2a\u7a0b\u5e8f\u7684\u8fd9\u4e9b\u4e1c\u897f\u8fdbCPU\uff0c\u8fd9\u6837\u5c31\u505a\u5230\u4e86\u201c\u7ee7\u7eed\u6267\u884c\u53e6\u4e00\u4e2a\u7a0b\u5e8f\u201d\u3002\u7136\u540e\u7b49\u5230\u4e86\u65f6\u95f4\u6216\u8005\u7a0b\u5e8f\u4e3b\u52a8\u8868\u793a\u201c\u8fd9\u4e00\u6bb5\u6267\u884c\u5b8c\u4e86\u73b0\u5728\u6ca1\u4e8b\u5e72\u4e86\u201d\uff0c\u518d\u628a\u7a0b\u5e8f\u4eceCPU\u91cc\u5f04\u51fa\u6765\u3002
\n\u5728\u7cfb\u7edf\u5bfb\u627e\u4e0b\u4e00\u4e2a\u8981\u653e\u5230CPU\u4e0a\u6267\u884c\u7684\u7a0b\u5e8f\u7684\u65f6\u5019\uff0c\u8fd9\u79cd\u8868\u793a\u201c\u6ca1\u4e8b\u5e72\u201d\u7684\u7a0b\u5e8f\u662f\u4e0d\u4f1a\u88ab\u8003\u8651\u7684\uff1a\u90fd\u6ca1\u4e8b\u5e72\u4e86\u653e\u8fdb\u53bb\u5e72\u561b\u3002\u5f53\u7136\u8fd9\u79cd\u6ca1\u4e8b\u5e72\u7684\u7a0b\u5e8f\u4e5f\u80fd\u53d8\u6210\u6709\u4e8b\u5e72\uff0c\u4e00\u4e2a\u8f93\u5165\u6cd5\u4f60\u4e0d\u6309\u952e\u76d8\u7684\u65f6\u5019\u5b83\u6ca1\u4e8b\u5e72\uff0c\u4f60\u6309\u952e\u76d8\u4e86\u5b83\u5c31\u6709\u4e8b\u5e72\u4e86\uff1b\u4e00\u4e2a\u5199\u6587\u7ae0\u7684\u8f6f\u4ef6\uff0c\u5149\u6807\u663e\u793a\u7740\u7684\u65f6\u5019\u548c\u5149\u6807\u9690\u85cf\u7740\u7684\u65f6\u5019\u90fd\u662f\u6ca1\u4e8b\u5e72\uff0c\u8981\u4ece\u9690\u85cf\u53d8\u6210\u663e\u793a\u3001\u663e\u793a\u53d8\u6210\u9690\u85cf\u7684\u65f6\u5019\u8f6f\u4ef6\u5c31\u6709\u4e8b\u5e72\uff1b\u4e00\u4e2a\u64ad\u653e\u97f3\u4e50\u7684\u8f6f\u4ef6\uff0c\u58f0\u5361\u5728\u628a\u7a0b\u5e8f\u9001\u5165\u7684\u58f0\u97f3\u653e\u5b8c\u4e4b\u524d\uff0c\u64ad\u653e\u5668\u6ca1\u4e8b\u5e72\uff0c\u8fd9\u6bb5\u64ad\u5b8c\u4e86\u7684\u65f6\u5019\u7a0b\u5e8f\u5c31\u6709\u4e8b\u5e72\u4e86\uff1a\u8981\u9001\u4e0b\u4e00\u6bb5\u8fdb\u53bb\u3002\u4e00\u4e2a\u7a0b\u5e8f\u7684\u72b6\u6001\u4f1a\u5728\u8fd9\u79cd\u6709\u4e8b\u5e72\u6ca1\u4e8b\u5e72\u4e4b\u95f4\u53d8\u5316\u3002<\/p>\n

\u8fd9\u91cc\u4e0a\u4e0b\u6587\u91cc\u63d0\u5230\u7684\u201c\u7a0b\u5e8f\u201d\u6307\u7684\u662f\u7ebf\u7a0b\u3002\u7ebf\u6761\u4e00\u6837\u6267\u884c\u4e0b\u6765\u7684\u7a0b\u5e8f\u3002<\/p>\n

\u7ebf\u7a0b\u7684\u72b6\u6001\u5206\u4e3a \u65b0\u5efa\u3001\u5c31\u7eea\u3001\u963b\u585e\u3001\u8fd0\u884c\u3001\u6b7b\u4ea1 \u8fd9\u4e48\u51e0\u4e2a\u72b6\u6001\u3002\u91cd\u70b9\u5173\u6ce8\u5c31\u7eea\u963b\u585e\u548c\u8fd0\u884c\uff1a\u5c31\u7eea\uff0c\u4ee3\u8868\u8fd9\u4e2a\u7ebf\u7a0b\u9700\u8981\u653e\u5230CPU\u4e0a\u8fd0\u884c\uff0c\u6bd4\u5982\u4e8b\u60c5\u5e72\u4e00\u534a\u88ab\u64cd\u4f5c\u7cfb\u7edf\u5f3a\u884c\u4eceCPU\u62d6\u51fa\u6765\u7684\uff0c\u5c31\u4f1a\u662f\u8fd9\u79cd\u72b6\u6001\uff1a\u5b83\u4e0b\u6b21\u8fd8\u8981\u7ee7\u7eed\u8fd0\u884c\u624d\u884c\uff1b\u963b\u585e\uff0c\u5c31\u50cf\u521a\u624d\u8bf4\u7684\uff0c\u4e00\u4e2a\u64ad\u653e\u5668\uff0c\u5df2\u7ecf\u628a\u8981\u64ad\u653e\u7684\u4e00\u5c0f\u6bb5\u9001\u5230\u58f0\u5361\u90a3\u8fb9\u53bb\u4e86\uff0c\u5728\u58f0\u5361\u64ad\u653e\u5b8c\u8fd9\u6bb5\u4e4b\u524d\u6ca1\u4e8b\u5e72\uff0c\u6ca1\u4e8b\u5e72\u5c31\u662f\u963b\u585e\u72b6\u6001\uff0c\u7b49\u58f0\u5361\u64ad\u5b8c\u8fd9\u4e00\u6bb5\u4e86\u5b83\u53c8\u4f1a\u53d8\u6210\u5c31\u7eea\u72b6\u6001\uff0c\u5426\u5219\u4f60\u542c\u5b8c\u8fd9\u4e00\u5c0f\u6bb5\u97f3\u4e50\u5c31\u542c\u4e0d\u5230\u4e0b\u4e00\u6bb5\u4e86\u3002\u8fd0\u884c\uff0c\u5c31\u662f\u7ebf\u7a0b\u585e\u5230CPU\u91cc\u8fd0\u884c\u4e86\u3002<\/p>\n

4. \u6a21\u62df\u591a\u7ebf\u7a0b\u7f51\u7edc\u670d\u52a1\u5668\u7684\u7ebf\u7a0b\u5207\u6362\u5f00\u9500<\/h1>\n

\u524d\u9762\u7684\u57fa\u7840\u6982\u5ff5\u8bf4\u5b8c\u4e86\uff0c\u73b0\u5728\u8981\u8bb2\u8bb2\u7f51\u7edc\u670d\u52a1\u5668\u8fd9\u8fb9\u662f\u4e00\u79cd\u4ec0\u4e48\u6837\u7684\u60c5\u51b5\u3002\u8fd9\u91cc\u4ee5\u6700\u7b80\u5355\u7684\u80fd\u67b6\u9759\u6001\u7f51\u7ad9\u7684HTTP\u670d\u52a1\u5668\u4e3a\u4f8b\u5b50\u4e86\u3002<\/p>\n

\u8fd9\u6837\u7684HTTP\u670d\u52a1\u5668\u8981\u505a\u7684\u4e8b\u60c5\uff0c\u5176\u5b9e\u5f88\u7b80\u5355\u5730\u5c31\u53ea\u5305\u542b\u8fd9\u4e48\u51e0\u4e2a\uff1a\u63a5\u53d7\u7528\u6237\u7684\u94fe\u63a5\uff0c\u63a5\u6536\u7528\u6237\u53d1\u6765\u7684\u8bf7\u6c42\uff0c\u53d1\u9001\u7528\u6237\u8bf7\u6c42\u7684\u6587\u4ef6\uff0c\u5173\u95ed\u8fde\u63a5\u3002\u4f46\u662f\u7531\u4e8e\u7f51\u7edc\u4f20\u8f93\u662f\u5f88\u6162\u7684\uff0c\u670d\u52a1\u5668\u5e76\u4e0d\u80fd\u5904\u7406\u5b8c\u4e00\u4e2a\u4eba\u518d\u5904\u7406\u4e0b\u4e00\u4e2a\u4eba\uff1a\u4e07\u4e00\u9047\u4e0a\u4e00\u4e2a\u7f51\u7edc\u72b6\u6001\u4e0d\u592a\u597d\u7684\u4eba\uff0c\u5149\u662f\u6536\u8bf7\u6c42\u548c\u53d1\u6587\u4ef6\u5c31\u82b1\u4e86\u7279\u522b\u591a\u7684\u65f6\u95f4\uff0c\u751a\u81f3\u7a81\u7136\u5bf9\u65b9\u7f51\u7edc\u5c31\u65ad\u4e86\uff0c\u53ea\u80fd\u7b49\u8d85\u65f6\uff0c\u5c31\u4f1a\u53d8\u6210\u540e\u9762\u6392\u4e86\u4e00\u5806\u8981\u4e0a\u4f60\u8fd9\u4e2a\u7f51\u7ad9\u7684\u4eba\u5361\u5728\u8fd9\u91cc\u3002<\/p>\n

\u7136\u540e\u5c31\u6709\u4e86\u8fd9\u6837\u4e00\u79cd\u7b80\u5355\u7684\u505a\u6cd5\uff0c\u6765\u4e00\u4e2a\u7528\u6237\u8fde\u4e0a\u6765\u5c31\u5f00\u4e00\u4e2a\u65b0\u7ebf\u7a0b\uff0c\u4e13\u95e8\u63a5\u6536\u8fd9\u4e2a\u4eba\u53d1\u6765\u7684\u8bf7\u6c42\uff0c\u4e13\u95e8\u7ed9\u8fd9\u4e2a\u4eba\u53d1\u4ed6\u8981\u7684\u6587\u4ef6\u3002\u8fd9\u6837\u7684\u8bdd\uff0c\u8fde\u7684\u4eba\u591a\u4e86\uff0c\u7cfb\u7edf\u91cc\u5c31\u4f1a\u6709\u4e00\u5806\u8fd9\u6837\u7684\u7ebf\u7a0b\uff0c\u8fd9\u6837\u7684\u7ebf\u7a0b\u6267\u884c\u7684\u5957\u8def\u5927\u6982\u5c31\u662f\u6267\u884c\u4e86\u4e00\u6bb5\u4ee3\u7801\uff0c\u6bd4\u5982\u8981\u5206\u6790\u7528\u6237\u7684\u8bf7\u6c42\u6570\u636e\u4e86\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u4f1a\u8c03\u7528\u4f8b\u5982 recv \u8fd9\u6837\u7684\u51fd\u6570\u83b7\u53d6\u7528\u6237\u53d1\u6765\u7684\u6570\u636e\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u6b64\u65f6\u7528\u6237\u6ca1\u6709\u6570\u636e\u53d1\u6765\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7ebf\u7a0b\u5c31\u53d8\u6210\u4e86\u201c\u6ca1\u4e8b\u5e72\u201d\u7684\u72b6\u6001\uff0c\u7cfb\u7edf\u5c31\u628a\u8fd9\u4e2a\u7ebf\u7a0b\u4eceCPU\u62d6\u51fa\u6765\u3001\u585e\u522b\u7684\u8fdb\u53bb\u8fd0\u884c\u4e86\uff0c\u76f4\u5230\u901a\u8fc7\u7f51\u7edc\u6536\u5230\u4e86\u7528\u6237\u53d1\u6765\u7684\u8bf7\u6c42\uff0c\u624d\u4f1a\u53d8\u56de\u5c31\u7eea\u72b6\u6001\u3002<\/p>\n

\u73b0\u5728\u6a21\u62df\u4e00\u4e0b\u7ebf\u7a0b\u8fd9\u6837\u7684\u884c\u4e3a\uff0c\u4e3a\u4e86\u65b9\u4fbf\u8ba1\u65f6\uff0c\u6211\u5ffd\u7565\u4e86\u7f51\u7edc\u4f20\u8f93\u6240\u9700\u7684\u65f6\u95f4\uff0c\u5c31\u53ea\u6a21\u62df\u8fd9\u4e2a\u201c\u88ab\u4eceCPU\u91cc\u62d6\u51fa\u6765\u201d\u7684\u52a8\u4f5c\u3002\u7136\u540e\u4e00\u4e2a\u7ebf\u7a0b\u5e72\u7684\u4e8b\u60c5\u5176\u5b9e\u5c31\u4e24\u4e2a\uff1a\u4e00\u4e2a\u662f\u6267\u884c\u4ee3\u7801\uff0c\u8fd9\u91cc\u7528\u6c42\u4e09\u4e2a\u6570\u7684\u5e73\u5747\u6570\u6a21\u62df\uff1b\u53e6\u4e00\u4e2a\u5c31\u662f\u201c\u88ab\u4eceCPU\u91cc\u62d6\u51fa\u6765\u201d\u3002\u62d6\u51fa\u6765\u7528\u7684\u662f std::this_thread::yield(); \u8fd9\u79cd\u65b9\u6cd5\u3002\u6211\u8981\u7b49\u6240\u6709\u7ebf\u7a0b\u90fd\u521b\u5efa\u5b8c\u4e86\u624d\u5f00\u59cb\u6267\u884c\u548c\u8ba1\u65f6\uff0c\u6240\u4ee5\u7528\u4e86Barrier\uff1a\u8fd9\u662f\u4e00\u4e2a\u80fd\u8ba9\u6307\u5b9a\u6570\u91cf\u7684\u7ebf\u7a0b\u540c\u65f6\u5230\u8fbe\u8fd9\u4e2a\u201c\u6805\u680f\u201d\u4e4b\u540e\u624d\u80fd\u7ee7\u7eed\u6267\u884c\u7684\u673a\u5236<\/p>\n

SYNCHRONIZATION_BARRIER barrier;\r\nvoid ThreadFunc()\r\n{\r\n\u00a0\u00a0\u00a0 EnterSynchronizationBarrier(&barrier, 0);\r\n\u00a0\u00a0\u00a0 std::vector<int> input(256 * 1024);\r\n\u00a0\u00a0\u00a0 std::vector<int> output(256 * 1024);\r\n\r\n\u00a0\u00a0\u00a0 for (int rep = 0; rep < 1000; ++rep)\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for (size_t i = 0; i < input.size() - 2; ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 output[i] = (input[i] + input[i + 1] + input[i + 2]) \/ 3;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 std::this_thread::yield();\r\n\u00a0\u00a0\u00a0 }\r\n}\r\n<\/pre>\n
\u7136\u540e\u6211\u73b0\u5728\u5f00200\u4e2a\u8fd9\u6837\u7684\u7ebf\u7a0b\u8ba9\u5b83\u8dd1\uff1a<\/p>\n
int main()\r\n{\r\n\u00a0\u00a0\u00a0 InitializeSynchronizationBarrier(&barrier, 201, -1);\r\n\u00a0\u00a0\u00a0 std::vector<std::thread> threads(200);\r\n\r\n\u00a0\u00a0\u00a0 for (size_t i = 0; i < threads.size(); ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 threads[i] = std::thread(ThreadFunc);\r\n\u00a0\u00a0\u00a0 EnterSynchronizationBarrier(&barrier, 0);\r\n\u00a0\u00a0\u00a0 DeleteSynchronizationBarrier(&barrier);\r\n\u00a0\u00a0\u00a0 time_t beginTime = time(NULL);\r\n\u00a0\u00a0\u00a0 for (size_t i = 0; i < threads.size(); ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 threads[i].join();\r\n\u00a0\u00a0\u00a0 std::cout << (time(NULL) - beginTime) << std::endl;\r\n}\r\n<\/pre>\n
\u52a0\u4e0a\u6240\u9700\u7684\u5934\u6587\u4ef6\uff0c\u6574\u4e2a\u7a0b\u5e8f\u662f\u8fd9\u6837\u3002\u8fd9\u4e2a\u7a0b\u5e8f\u4e3b\u8981\u662f\u6f14\u793a\u7ebf\u7a0b\u5207\u6362\u4f1a\u82b1\u591a\u5c11\u65f6\u95f4\u3002\u4f7f\u7528\u540e\u9762\u63d0\u5230\u7684IO\u591a\u8def\u590d\u7528\u6280\u672f\u5e76\u4e0d\u5b8c\u5168\u662f\u56e0\u4e3a\u8282\u7701\u7ebf\u7a0b\u5207\u6362\u7684\u5f00\u9500\u7684\uff0c\u8fd9\u91cc\u5148\u4e0d\u8c08\u5176\u4ed6\u7684\u5f71\u54cd\u56e0\u7d20\uff0c\u4e00\u4e2a\u4e2a\u7406\u89e3\u4f1a\u7b80\u5355\u4e00\u4e9b\u3002\u53ef\u4ee5\u76f4\u63a5\u590d\u5236\u53bb\u7f16\u8bd1\u81ea\u5df1\u8fd0\u884c\u8bd5\u8bd5<\/p>\n
#include <Windows.h>\r\n#include <thread>\r\n#include <vector>\r\n#include <iostream>\r\n#include <time.h>\r\n\r\nSYNCHRONIZATION_BARRIER barrier;\r\nvoid ThreadFunc()\r\n{\r\n\u00a0\u00a0\u00a0 std::vector<int> input(256 * 1024);\r\n\u00a0\u00a0\u00a0 std::vector<int> output(256 * 1024);\r\n\u00a0\u00a0\u00a0 EnterSynchronizationBarrier(&barrier, 0);\r\n\u00a0\u00a0\u00a0 for (int rep = 0; rep < 1000; ++rep)\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for (size_t i = 0; i < input.size() - 2; ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 output[i] = (input[i] + input[i + 1] + input[i + 2]) \/ 3;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 std::this_thread::yield();\r\n\u00a0\u00a0\u00a0 }\r\n}\r\n\r\nint main()\r\n{\r\n\u00a0\u00a0\u00a0 InitializeSynchronizationBarrier(&barrier, 201, -1);\r\n\u00a0\u00a0\u00a0 std::vector<std::thread> threads(200);\r\n\r\n\u00a0\u00a0\u00a0 for (size_t i = 0; i < threads.size(); ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 threads[i] = std::thread(ThreadFunc);\r\n\u00a0\u00a0\u00a0 EnterSynchronizationBarrier(&barrier, 0);\r\n\u00a0\u00a0\u00a0 DeleteSynchronizationBarrier(&barrier);\r\n\u00a0\u00a0\u00a0 time_t beginTime = time(NULL);\r\n\u00a0\u00a0\u00a0 for (size_t i = 0; i < threads.size(); ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 threads[i].join();\r\n\u00a0\u00a0\u00a0 std::cout << (time(NULL) - beginTime) << std::endl;\r\n\u00a0\u00a0\u00a0 return 0;\r\n}\r\n<\/pre>\n
\u5b83\u80fd\u7ed9\u51fa\u82b1\u7684\u603b\u65f6\u95f4\u3002\u6211\u8fd9\u8fb9\u8fd0\u884c\u4ee5\u540e\uff0c\u82b1\u8d39\u662f 31\u3002<\/p>\n
5. \u51cf\u5c11\u7ebf\u7a0b\u5f00\u9500<\/h1>\n
\u4ee5\u4e0a\u7a0b\u5e8f\u4ee3\u7801\u7528 std::this_thread::yield() \u6765\u6a21\u62df\u4e86\u201c\u8981\u4ece\u7528\u6237\u63a5\u6536\u6570\u636e\u4e86\uff0c\u4f46\u662f\u6570\u636e\u6ca1\u6765\uff0c\u6240\u4ee5\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u628a\u5f53\u524d\u7ebf\u7a0b\u4eceCPU\u62a0\u51fa\u6765\uff0c\u628aCPU\u8ba9\u7ed9\u522b\u4eba\u201d\u8fd9\u6837\u7684\u64cd\u4f5c\u3002\u8fd9\u91cc\u6709200\u4e2a\u7ebf\u7a0b\u5728\u6267\u884c\uff0c\u6240\u4ee5\u7cfb\u7edf\u4e00\u76f4\u5728\u8fd9\u4e48\u4e9b\u7ebf\u7a0b\u4e4b\u95f4\u5207\u6362\u3002\u6211\u73b0\u5728\u6362\u4e00\u79cd\u65b9\u5f0f\uff0c\u8ba9\u540c\u65f6\u8fd0\u884c\u7684\u7ebf\u7a0b\u6570\u6b63\u597d\u4e00\u4e2aCPU\u6838\u5fc3\u4e00\u4e2a\uff0c\u8fd9\u6837\u5728\u8c03\u7528 yield \u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u53d1\u751f\u201c\u7cfb\u7edf\u53d1\u73b0\u6ca1\u6709\u5176\u4ed6\u7ebf\u7a0b\u8981\u8fd0\u884c\uff0c\u6240\u4ee5\u7ee7\u7eed\u8ba9\u4f60\u7528CPU\u201d\u7684\u60c5\u51b5\uff0c\u4ee5\u6b64\u6765\u6a21\u62df\u7ebf\u7a0b\u5207\u6362\u7684\u5f00\u9500\u5c0f\u4e86\u7684\u65f6\u5019\u662f\u4ec0\u4e48\u6837\u7684\u3002\u8fd9\u91cc\u7528\u4e00\u4e2a\u201c\u4fe1\u53f7\u91cf\u201d\u6765\u63a7\u5236\u540c\u65f6\u8fd0\u884c\u7684\u7ebf\u7a0b\u7684\u6570\u91cf\uff0c\u5b9e\u9645\u8fd0\u884c\u6548\u679c\u5c06\u662f\u4e00\u4e2aCPU\u6838\u5fc3\u4e0a\u4e00\u4e2a\u7ebf\u7a0b\u5728\u8dd1\uff0c\u6bcf\u6b21\u5230 yield \u7684\u65f6\u5019\u7cfb\u7edf\u4f1a\u770b\u4e00\u5708\u6709\u6ca1\u6709\u7ebf\u7a0b\u8981\u7528\uff0c\u6ca1\u6709\u8981\u7528\u6240\u4ee5\u5c31\u4e0d\u5207\u6362\u3002\u6211\u76f4\u63a5\u7ed9\u51fa\u6574\u4e2a\u7a0b\u5e8f\u4ee3\u7801\u4e86\uff0c\u548c\u4e0a\u9762\u76f8\u6bd4\u53ef\u4ee5\u53d1\u73b0\u591a\u4e86\u4e2a Semaphore\uff08\u4fe1\u53f7\u91cf\uff09 \u800c\u5df2\u3002\u4fe1\u53f7\u91cf\u662f\u8fd9\u6837\u4e00\u79cd\u673a\u5236\uff0c\u4f60\u53ef\u4ee5\u58f0\u660e\u624b\u5934\u6709\u591a\u5c11\u4e2a\u201c\u8d44\u6e90\u201d\uff0c\u8fd9\u4e2a\u8d44\u6e90\u62ff\u8d70\u4e00\u4e2a\u5c11\u4e00\u4e2a\uff0c\u62ff\u4e0d\u5230\u4e86\u5c31\u4f1a\u5728\u90a3\u8fb9\u7b49\uff1b\u62ff\u5230\u7684\u201c\u4eba\u201d\u7528\u5b8c\u4e86\u4e4b\u540e\u53ef\u4ee5\u8fd8\u56de\u53bb\uff0c\u8fd8\u56de\u53bb\u76f4\u63a5\u5c31\u62ff\u53bb\u7ed9\u5728\u90a3\u8fb9\u7b49\u7684\u201c\u4eba\u201d\u4e86\u3002\u8fd9\u6837\u53d7\u5230\u4fe1\u53f7\u91cf\u7684\u63a7\u5236\uff0c\u6bd4\u5982\u6211\u662f4\u6838CPU\uff0c\u90a3\u4e48200\u4e2a\u7ebf\u7a0b\u91cc\u5c31\u53ea\u4f1a\u67094\u4e2a\u7ebf\u7a0b\u80fd\u8fdb\u53bb\u6267\u884c\u7b97\u5e73\u5747\u6570\u548cyield\uff08\u6a21\u62df\u7f51\u7edc\u6536\u53d1\uff09\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u3002\u90a3\u4e48yield\u7684\u65f6\u5019\u7cfb\u7edf\u5c31\u4f1a\u8ba9\u4f60\u7ee7\u7eed\u6267\u884c\u800c\u6ca1\u6709\u5207\u6362\uff0c\u5207\u6362\u7684\u5f00\u9500\u5927\u5927\u51cf\u5c0f\u4e86\u3002<\/p>\n
#include <Windows.h>\r\n#include <thread>\r\n#include <vector>\r\n#include <iostream>\r\n#include <time.h>\r\n\r\nSYNCHRONIZATION_BARRIER barrier;\r\nHANDLE semaphore;\r\nvoid ThreadFunc()\r\n{\r\n\u00a0\u00a0\u00a0 std::vector<int> input(256 * 1024);\r\n\u00a0\u00a0\u00a0 std::vector<int> output(256 * 1024);\r\n\u00a0\u00a0\u00a0 EnterSynchronizationBarrier(&barrier, 0);\r\n\u00a0\u00a0\u00a0 WaitForSingleObject(semaphore, INFINITE);\r\n\u00a0\u00a0\u00a0 for (int rep = 0; rep < 1000; ++rep)\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for (size_t i = 0; i < input.size() - 2; ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 output[i] = (input[i] + input[i + 1] + input[i + 2]) \/ 3;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 std::this_thread::yield();\r\n\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0 ReleaseSemaphore(semaphore, 1, NULL);\r\n}\r\n\r\nint main()\r\n{\r\n\u00a0\u00a0\u00a0 InitializeSynchronizationBarrier(&barrier, 201, -1);\r\n\u00a0\u00a0\u00a0 semaphore = CreateSemaphore(0, std::thread::hardware_concurrency(), std::thread::hardware_concurrency(), 0);\r\n\u00a0\u00a0\u00a0 std::vector<std::thread> threads(200);\r\n\r\n\u00a0\u00a0\u00a0 for (size_t i = 0; i < threads.size(); ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 threads[i] = std::thread(ThreadFunc);\r\n\u00a0\u00a0\u00a0 EnterSynchronizationBarrier(&barrier, 0);\r\n\u00a0\u00a0\u00a0 DeleteSynchronizationBarrier(&barrier);\r\n\u00a0\u00a0\u00a0 time_t beginTime = time(NULL);\r\n\u00a0\u00a0\u00a0 for (size_t i = 0; i < threads.size(); ++i)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 threads[i].join();\r\n\u00a0\u00a0\u00a0 std::cout << (time(NULL) - beginTime) << std::endl;\r\n\u00a0\u00a0\u00a0 CloseHandle(semaphore);\r\n\u00a0\u00a0\u00a0 return 0;\r\n}\r\n<\/pre>\n
\u8fd9\u4e2a\u7a0b\u5e8f\u5728\u6211\u7535\u8111\u4e0a\u8fd0\u884c\uff0c\u6700\u7ec8\u8f93\u51fa\u662f 21\u3002<\/p>\n
6. IO\u591a\u8def\u590d\u7528<\/h1>\n
\u4ece\u4e0a\u9762\u7a0b\u5e8f\u7684\u5bf9\u6bd4\uff0c\u53ef\u4ee5\u770b\u51fa\u7ebf\u7a0b\u5207\u6362\u7684\u5f00\u9500\u5c0f\u4e86\u4e4b\u540e\uff0c\u6267\u884c\u540c\u6837\u591a\u7684\u4efb\u52a1\uff0c\u6027\u80fd\u8981\u597d\u4e0d\u5c11\uff0c\u8fd9\u4e2a\u4f8b\u5b50\u5728\u6211\u7535\u8111\u4e0a\u662f\u5dee\u4e86\u5dee\u4e0d\u591a10\u79d2\u949f\u3002<\/p>\n
\u90a3\u4e48\u56de\u5230\u521a\u624dHTTP\u670d\u52a1\u5668\u7684\u8bdd\u9898\uff0cHTTP\u670d\u52a1\u5668\u7ed9\u4e00\u4e2a\u8fde\u4e0a\u6765\u7684\u7528\u6237\u5f00\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u7f51\u7edc\u53c8\u662f\u4e00\u79cd\u5f88\u6162\u7684\u8f93\u5165\u8f93\u51fa\uff08IO\uff09\u65b9\u5f0f\uff0c\u5728\u8c03\u7528 send \u53d1\u9001\u6570\u636e\u548c\u8c03\u7528 recv \u63a5\u6536\u6570\u636e\u7684\u65f6\u5019\uff0c\u4f1a\u9047\u5230\u53d1\u9001\u7f13\u51b2\u533a\u6ee1\u4e86\u53ea\u80fd\u7b49\u3001\u63a5\u6536\u7f13\u51b2\u533a\u7a7a\u4e86\u53ea\u80fd\u7b49 \u8fd9\u6837\u7684\u60c5\u51b5\u3002\u56e0\u4e3a\u4f60\u8981\u7b49\u4e86\uff0c\u7cfb\u7edf\u5c31\u4f1a\u505a\u7ebf\u7a0b\u5207\u6362\uff0c\u6362\u5230\u80fd\u8fd0\u884c\u7684\u7ebf\u7a0b\u4e0a\u3002\u7b49\u4f60\u7b49\u5230\u4f60\u8981\u7684\u4e1c\u897f\u4e86\uff0c\u518d\u8ba9\u4f60\u7ee7\u7eed\u6267\u884c\u3002\u6548\u679c\u5c31\u662f\u548c\u4e0a\u9762\u4f8b\u5b50\u91cc\u524d\u4e00\u4e2a\u7a0b\u5e8f\u90a3\u6837\uff0c\u5207\u6362\u7ebf\u7a0b\u82b1\u4e86\u5f88\u591a\u65f6\u95f4\u3002<\/p>\n
\u90a3\u4e48 epoll\u3001kqueue \u662f\u600e\u4e48\u4e00\u56de\u4e8b\u5462\uff0c\u4f60\u628a\u7f51\u7edc\u901a\u4fe1\u90a3\u4e2a\u201c\u6587\u4ef6\u201d\u8bbe\u7f6e\u6210\u201c\u975e\u963b\u585e\u201d\u6a21\u5f0f\u4e4b\u540e\uff0c\u5982\u679c send \u9047\u5230\u53d1\u9001\u7f13\u51b2\u533a\u6ee1\u4e86\u3001 recv \u9047\u5230\u63a5\u6536\u7f13\u51b2\u533a\u7a7a\u4e86\uff0c\u5b83\u4e0d\u4f1a\u201c\u7b49\u201d\uff0c\u800c\u662f\u76f4\u63a5\u544a\u8bc9\u4f60\u6ee1\u4e86\u7a7a\u4e86\uff0c\u8fd9\u4e2a\u65f6\u5019\u4f60\u8981\u505a\u7684\u4e8b\u60c5\u662f\u901a\u8fc7 epoll \u6216\u8005 kqueue \u673a\u5236\uff0c\u544a\u8bc9\u7cfb\u7edf\u201c\u80fd\u53d1\u9001\u6570\u636e\u3001\u80fd\u63a5\u6536\u6570\u636e\u4e86\u53eb\u6211\u201d\uff0c\u56e0\u4e3a\u7ebf\u7a0b\u6ca1\u6709\u5728\u7b49\uff0c\u6240\u4ee5\u4f60\u53ef\u4ee5\u63a5\u7740\u5e72\u5176\u4ed6\u4e8b\uff0c\u8fd9\u91cc\u6307\u7684\u662f\u5904\u7406\u5176\u4ed6\u7528\u6237\u7684\u8fde\u63a5\u3002\u7b49\u4e00\u6ce2\u4efb\u52a1\u5904\u7406\u5b8c\u4e4b\u540e\uff0c\u5c31\u56de\u5230\u201c\u7b49 epoll \/ kqueue \u53eb\u201d\u8fd9\u6837\u7684\u9636\u6bb5\uff0cepoll \u548c kqueue \u53d1\u73b0\u6709\u7528\u6237\u53ef\u4ee5\u53d1\u6570\u636e\u53ef\u4ee5\u6536\u6570\u636e\u4e86\uff0c\u5c31\u53eb\u4f60\uff0c\u544a\u8bc9\u4f60\u6709\u591a\u5c11\u7528\u6237\u53ef\u4ee5\u6536\u53d1\u4e86\uff0c\u7136\u540e\u4f60\u5c31\u63a5\u7740\u5904\u7406\u8fd9\u4e9b\u7528\u6237\u2014\u2014\u4e00\u5207\u90fd\u662f\u5728\u540c\u4e00\u4e2a\u7ebf\u7a0b\u5185\u6267\u884c\uff0c\u4e2d\u95f4\u4e0d\u8fdb\u884c\u5207\u6362\u3002\u8fd9\u6837\u7ebf\u7a0b\u5207\u6362\u7684\u5f00\u9500\u5c31\u7701\u6389\u4e86\uff0c\u5c31\u50cf\u4e0a\u9762\u7b2c\u4e8c\u4e2a\u4f8b\u5b50\u90a3\u6837\uff1ayield \u7684\u65f6\u5019\u4e0d\u5207\u6362\u3001\u7ee7\u7eed\u8ba9\u4f60\u6267\u884c\u3002<\/p>\n
\u8fd8\u6709\u4e00\u4e2a\u201cio\u5b8c\u6210\u7aef\u53e3\u201d\u6ca1\u8bf4\uff0c\u5176\u5b9e\u5b83\u539f\u7406\u548c epoll\u3001kqueue \u5dee\u4e0d\u591a\uff0c\u53ea\u662f\u5b83\u628a\u987a\u5e8f\u53d8\u4e86\u4e00\u4e0b\uff1a\u4e0d\u662f\u53ef\u4ee5 send \u53ef\u4ee5 recv \u7684\u65f6\u5019\u53eb\u4f60\u3002\u8c03\u7528 send\u3001recv \u7684\u65f6\u5019\u5b83\u4e0d\u4f1a\u544a\u8bc9\u4f60\u7f13\u51b2\u533a\u6ee1\u4e86\u7a7a\u4e86\uff0c\u800c\u662f\u786e\u5b9e\u53bb\u6267\u884c\u4e86\uff0c\u7b49\u5230\u53d1\u5b8c\u4e86\u3001\u6536\u5b8c\u4e86\u518d\u53eb\u4f60\uff0c\u800c\u4e0d\u662f\u53ef\u4ee5\u53d1\u3001\u53ef\u4ee5\u6536\u7684\u65f6\u5019\u53eb\u4f60\u3002\u8fd9\u4e2a\u5c42\u9762\u4e0a\u8bf4\u5176\u5b9e\u6ca1\u4ec0\u4e48\u533a\u522b\u2026\u2026<\/p>\n
7. \uff1f\uff1f\uff1f<\/h1>\n
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