{"id":5233,"date":"2021-05-13T18:50:36","date_gmt":"2021-05-13T10:50:36","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=5233"},"modified":"2021-05-13T18:50:36","modified_gmt":"2021-05-13T10:50:36","slug":"%e5%9b%be%e8%a7%a3-%e6%b7%b1%e5%85%a5%e6%8f%ad%e7%a7%98-epoll-%e6%98%af%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0-io-%e5%a4%9a%e8%b7%af%e5%a4%8d%e7%94%a8%e7%9a%84%ef%bc%81-2","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/5233","title":{"rendered":"\u56fe\u89e3 | \u6df1\u5165\u63ed\u79d8 epoll \u662f\u5982\u4f55\u5b9e\u73b0 IO \u591a\u8def\u590d\u7528\u7684\uff01"},"content":{"rendered":"

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

 <\/p>\n

\u539f\u521b<\/span>\u00a0\u5f20\u5f66\u98deallen<\/span><\/span>\u00a0<\/a>\u5f00\u53d1\u5185\u529f\u4fee\u70bc<\/span>\u00a03\u670817\u65e5<\/em><\/div>\n
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\u6536\u5f55\u4e8e\u8bdd\u9898<\/div>\n
#\u5f00\u53d1\u5185\u529f\u4fee\u70bc\u4e4b\u7f51\u7edc\u7bc7<\/span><\/div>\n<\/div>\n
12\u4e2a<\/div>\n<\/div>\n
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\u70b9\u51fb\u4e0a\u65b9\u84dd\u5b57”<\/em><\/span>\u5f00\u53d1\u5185\u529f\u4fee\u70bc<\/em><\/span>“\uff0c\u5173\u6ce8\u5e76\u8bbe\u4e3a\u661f\u6807<\/em><\/span><\/p>\n

\u4e86\u89e3\u4f60\u7684\u6bcf\u4e00\u6bd4\u7279\uff0c\u7528\u597d\u4f60\u7684\u6bcf\u4e00\u7eb3\u79d2<\/em><\/span><\/p>\n

\u8fdb\u7a0b\u5728 Linux \u4e0a\u662f\u4e00\u4e2a\u5f00\u9500\u4e0d\u5c0f\u7684\u5bb6\u4f19\uff0c\u5148\u4e0d\u8bf4\u521b\u5efa\uff0c\u5149\u662f\u4e0a\u4e0b\u6587\u5207\u6362\u4e00\u6b21\u5c31\u5f97\u51e0\u4e2a\u5fae\u79d2\u3002\u6240\u4ee5\u4e3a\u4e86\u9ad8\u6548\u5730\u5bf9\u6d77\u91cf\u7528\u6237\u63d0\u4f9b\u670d\u52a1\uff0c\u5fc5\u987b\u8981\u8ba9\u4e00\u4e2a\u8fdb\u7a0b\u80fd\u540c\u65f6\u5904\u7406\u5f88\u591a\u4e2a tcp \u8fde\u63a5\u624d\u884c\u3002\u73b0\u5728\u5047\u8bbe\u4e00\u4e2a\u8fdb\u7a0b\u4fdd\u6301\u4e86 10000 \u6761\u8fde\u63a5\uff0c\u90a3\u4e48\u5982\u4f55\u53d1\u73b0\u54ea\u6761\u8fde\u63a5\u4e0a\u6709\u6570\u636e\u53ef\u8bfb\u4e86\u3001\u54ea\u6761\u8fde\u63a5\u53ef\u5199\u4e86 \uff1f<\/p>\n

\u6211\u4eec\u5f53\u7136\u53ef\u4ee5\u91c7\u7528\u5faa\u73af\u904d\u5386\u7684\u65b9\u5f0f\u6765\u53d1\u73b0 IO \u4e8b\u4ef6\uff0c\u4f46\u8fd9\u79cd\u65b9\u5f0f\u592a\u4f4e\u7ea7\u4e86\u3002\u6211\u4eec\u5e0c\u671b\u6709\u4e00\u79cd\u66f4\u9ad8\u6548\u7684\u673a\u5236\uff0c\u5728\u5f88\u591a\u8fde\u63a5\u4e2d\u7684\u67d0\u6761\u4e0a\u6709 IO \u4e8b\u4ef6\u53d1\u751f\u7684\u65f6\u5019\u76f4\u63a5\u5feb\u901f\u628a\u5b83\u627e\u51fa\u6765\u3002\u5176\u5b9e\u8fd9\u4e2a\u4e8b\u60c5 Linux \u64cd\u4f5c\u7cfb\u7edf\u5df2\u7ecf\u66ff\u6211\u4eec\u90fd\u505a\u597d\u4e86\uff0c\u5b83\u5c31\u662f\u6211\u4eec\u6240\u719f\u77e5\u7684\u00a0IO \u591a\u8def\u590d\u7528<\/strong>\u673a\u5236\u3002\u8fd9\u91cc\u7684\u590d\u7528\u6307\u7684\u5c31\u662f\u5bf9\u8fdb\u7a0b\u7684\u590d\u7528\u3002<\/p>\n

\u5728 Linux \u4e0a\u591a\u8def\u590d\u7528\u65b9\u6848\u6709 select\u3001poll\u3001epoll\u3002\u5b83\u4eec\u4e09\u4e2a\u4e2d epoll \u7684\u6027\u80fd\u8868\u73b0\u662f\u6700\u4f18\u79c0\u7684\uff0c\u80fd\u652f\u6301\u7684\u5e76\u53d1\u91cf\u4e5f\u6700\u5927\u3002\u6240\u4ee5\u6211\u4eec\u4eca\u5929\u628a epoll \u4f5c\u4e3a\u8981\u62c6\u89e3\u7684\u5bf9\u8c61\uff0c\u6df1\u5165\u63ed\u79d8\u5185\u6838\u662f\u5982\u4f55\u5b9e\u73b0\u591a\u8def\u7684 IO \u7ba1\u7406\u7684\u3002<\/p>\n

\u4e3a\u4e86\u65b9\u4fbf\u8ba8\u8bba\uff0c\u6211\u4eec\u4e3e\u4e00\u4e2a\u4f7f\u7528\u4e86 epoll \u7684\u7b80\u5355\u793a\u4f8b\uff08\u53ea\u662f\u4e2a\u4f8b\u5b50\uff0c\u5b9e\u8df5\u4e2d\u4e0d\u8fd9\u4e48\u5199\uff09\uff1a<\/p>\n

int\u00a0main()<\/span>{
\u00a0\u00a0\u00a0\u00a0listen(lfd,\u00a0...);

\u00a0\u00a0\u00a0\u00a0cfd1\u00a0=\u00a0accept(...);
\u00a0\u00a0\u00a0\u00a0cfd2\u00a0=\u00a0accept(...);
\u00a0\u00a0\u00a0\u00a0efd\u00a0=\u00a0epoll_create(...);

\u00a0\u00a0\u00a0\u00a0epoll_ctl(efd,\u00a0EPOLL_CTL_ADD,\u00a0cfd1,\u00a0...);
\u00a0\u00a0\u00a0\u00a0epoll_ctl(efd,\u00a0EPOLL_CTL_ADD,\u00a0cfd2,\u00a0...);
\u00a0\u00a0\u00a0\u00a0epoll_wait(efd,\u00a0...)
}
<\/code><\/pre>\n
\u5176\u4e2d\u548c epoll \u76f8\u5173\u7684\u51fd\u6570\u662f\u5982\u4e0b\u4e09\u4e2a\uff1a<\/p>\n