{"id":47146,"date":"2025-07-30T06:31:50","date_gmt":"2025-07-29T22:31:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/47146.html"},"modified":"2025-07-30T06:31:50","modified_gmt":"2025-07-29T22:31:50","slug":"%e6%9e%84%e5%bb%ba%e9%ab%98%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%9aiocp%e4%b8%8e%e7%ba%bf%e7%a8%8b%e6%b1%a0%e6%95%b4%e5%90%88%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/47146.html","title":{"rendered":"\u6784\u5efa\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\uff1aIOCP\u4e0e\u7ebf\u7a0b\u6c60\u6574\u5408\u5b9e\u6218"},"content":{"rendered":"<p>  \u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90&#xff0c;\u70b9\u51fb\u83b7\u53d6  <img decoding=\"async\" alt=\"menu-r.4af5f7ec.gif\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729223149-68894bd52d157.gif\" style=\"width:16px;margin-left:4px;vertical-align:text-bottom;cursor:text\" \/> <\/p>\n<p> \u7b80\u4ecb&#xff1a;\u5728\u5f00\u53d1\u9ad8\u6027\u80fd\u3001\u9ad8\u5e76\u53d1\u7684\u5927\u578b\u670d\u52a1\u5668\u65f6&#xff0c;IO\u5b8c\u6210\u7aef\u53e3(IOCP)\u548c\u7ebf\u7a0b\u6c60\u662f\u6838\u5fc3\u7ec4\u4ef6\u3002\u672c\u538b\u7f29\u5305\u63d0\u4f9b\u4e86 CompletionIoServer.cpp\u3001CompletionIoClient.cpp\u3001CompletionIoServer.h \u548c CompletionIoClient.h \u56db\u4e2a\u6587\u4ef6&#xff0c;\u5c55\u793a\u4e86IOCP\u548c\u7ebf\u7a0b\u6c60\u5982\u4f55\u7ed3\u5408\u4f7f\u7528\u4ee5\u63d0\u9ad8\u5904\u7406\u5e76\u53d1I\/O\u64cd\u4f5c\u7684\u6548\u7387\u3002IOCP\u4f5c\u4e3aWindows\u9ad8\u6548\u5f02\u6b65I\/O\u6a21\u578b&#xff0c;\u5141\u8bb8\u591a\u7ebf\u7a0b\u5171\u4eab\u7aef\u53e3&#xff0c;\u964d\u4f4e\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500&#xff0c;\u9002\u5408\u5904\u7406\u5927\u91cf\u8fde\u63a5\u3002\u7ebf\u7a0b\u6c60\u901a\u8fc7\u9884\u5148\u521b\u5efa\u7ebf\u7a0b\u96c6\u5408\u6765\u51cf\u5c11\u521b\u5efa\u9500\u6bc1\u5f00\u9500&#xff0c;\u5e76\u9ad8\u6548\u7ba1\u7406\u8d44\u6e90\u3002\u6e90\u4ee3\u7801\u4e2d\u53ef\u80fd\u8fd8\u5305\u542b\u4e86\u7ebf\u7a0b\u6c60\u7684\u8c03\u5ea6\u3001\u540c\u6b65\u673a\u5236\u7b49\u5b9e\u73b0\u7ec6\u8282\u3002\u6574\u4f53\u800c\u8a00&#xff0c;\u8fd9\u4e9b\u4ee3\u7801\u662f\u7406\u89e3\u548c\u5b9e\u8df5\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u5f00\u53d1\u7684\u5b9d\u8d35\u6750\u6599\u3002  <img decoding=\"async\" alt=\"IOCP\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729223149-68894bd537ceb.png\" \/> <\/p>\n<h2> 1. IO\u5b8c\u6210\u7aef\u53e3(IOCP)\u6982\u5ff5\u53ca\u4f18\u52bf <\/h2>\n<h3> 1.1 IO\u5b8c\u6210\u7aef\u53e3(IOCP)\u7b80\u4ecb <\/h3>\n<p> IO\u5b8c\u6210\u7aef\u53e3(IOCP)\u662fWindows\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u4e00\u4e2aI\/O\u6a21\u578b&#xff0c;\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u4f7f\u7528\u5355\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406\u591a\u4e2a\u5e76\u53d1\u7684I\/O\u64cd\u4f5c\u3002IOCP\u57fa\u4e8e\u4e8b\u4ef6\u901a\u77e5\u673a\u5236&#xff0c;\u5f53\u4e00\u4e2aI\/O\u64cd\u4f5c\u5b8c\u6210\u65f6&#xff0c;\u7cfb\u7edf\u5c06\u53d1\u9001\u4e00\u4e2a\u901a\u77e5\u5230IOCP\u961f\u5217&#xff0c;\u4ece\u800c\u89e6\u53d1\u540e\u7eed\u7684\u5904\u7406\u3002IOCP\u63d0\u4f9b\u4e86\u4e00\u79cd\u6709\u6548\u7684\u65b9\u5f0f\u6765\u6784\u5efa\u9ad8\u6027\u80fd\u7684\u7f51\u7edc\u670d\u52a1\u5668&#xff0c;\u5b83\u53ef\u4ee5\u9ad8\u6548\u5730\u5229\u7528\u7cfb\u7edf\u8d44\u6e90&#xff0c;\u5c24\u5176\u662fCPU\u548c\u5185\u5b58\u3002 <\/p>\n<h3> 1.2 IOCP\u7684\u5de5\u4f5c\u539f\u7406 <\/h3>\n<p> IOCP\u6a21\u578b\u7684\u6838\u5fc3\u5728\u4e8e\u7ebf\u7a0b\u6c60\u548cI\/O\u53e5\u67c4\u7684\u5173\u8054\u3002\u5f53\u4e00\u4e2aI\/O\u64cd\u4f5c\u63d0\u4ea4\u7ed9IOCP\u540e&#xff0c;\u7cfb\u7edf\u4f1a\u5c06\u8be5\u64cd\u4f5c\u4e0e\u4e00\u4e2a\u7ebf\u7a0b\u5173\u8054\u8d77\u6765\u3002\u5b8c\u6210\u7aef\u53e3\u5728\u5185\u90e8\u7ef4\u62a4\u4e86\u4e00\u4e2a\u961f\u5217&#xff0c;\u7528\u4e8e\u5b58\u653e\u5b8c\u6210\u7684I\/O\u8bf7\u6c42\u3002\u5f53I\/O\u64cd\u4f5c\u5b8c\u6210\u540e&#xff0c;\u7cfb\u7edf\u4f1a\u5c06\u76f8\u5e94\u7684\u4fe1\u606f\u653e\u5165\u961f\u5217\u4e2d&#xff0c;\u7b49\u5f85\u7ebf\u7a0b\u7a7a\u95f2\u65f6\u6765\u5904\u7406\u3002\u8fd9\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u5b9e\u73b0\u4e86\u7ebf\u7a0b\u4e0eI\/O\u64cd\u4f5c\u7684\u89e3\u8026&#xff0c;\u7ebf\u7a0b\u4e0d\u9700\u8981\u4e00\u76f4\u7b49\u5f85I\/O\u64cd\u4f5c\u7684\u5b8c\u6210\u3002 <\/p>\n<h3> 1.3 IOCP\u7684\u4f18\u52bf <\/h3>\n<p> \u76f8\u6bd4\u4f20\u7edf\u7684\u540c\u6b65I\/O\u548c\u591a\u7ebf\u7a0b\u6a21\u578b&#xff0c;IOCP\u6709\u4ee5\u4e0b\u4f18\u52bf&#xff1a;  &#8211;  \u9ad8\u6548\u5229\u7528\u7ebf\u7a0b\u8d44\u6e90  &#xff1a;\u4f20\u7edf\u7684\u591a\u7ebf\u7a0b\u6a21\u578b\u4e2d&#xff0c;\u5927\u91cf\u7ebf\u7a0b\u5728\u7b49\u5f85I\/O\u5b8c\u6210\u65f6\u4f1a\u6d88\u8017CPU\u8d44\u6e90\u3002\u800cIOCP\u901a\u8fc7\u7ebf\u7a0b\u6c60\u5b9e\u73b0\u4e86\u7ebf\u7a0b\u7684\u91cd\u7528&#xff0c;\u51cf\u5c11\u4e86\u7ebf\u7a0b\u521b\u5efa\u548c\u9500\u6bc1\u7684\u5f00\u9500\u3002  &#8211;  \u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u6269\u5c55\u6027  &#xff1a;IOCP\u80fd\u591f\u5f88\u597d\u5730\u5e94\u5bf9\u9ad8\u5e76\u53d1\u7684\u573a\u666f&#xff0c;\u901a\u8fc7\u5408\u7406\u7684\u7ebf\u7a0b\u6c60\u7ba1\u7406&#xff0c;\u53ef\u4ee5\u5e94\u5bf9\u5927\u91cf\u7684\u5e76\u53d1I\/O\u64cd\u4f5c&#xff0c;\u63d0\u9ad8\u670d\u52a1\u5668\u7684\u5904\u7406\u80fd\u529b\u3002  &#8211;  \u51cf\u5c11\u5ef6\u8fdf  &#xff1a;\u56e0\u4e3aI\/O\u64cd\u4f5c\u4e0e\u7ebf\u7a0b\u5206\u79bb&#xff0c;\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u5904\u7406\u591a\u4e2aI\/O\u64cd\u4f5c&#xff0c;\u4ece\u800c\u51cf\u5c11\u4e86\u64cd\u4f5c\u7684\u603b\u5ef6\u8fdf\u3002 <\/p>\n<p> \u8fd9\u4e9b\u4f18\u52bf\u4f7f\u5f97IOCP\u6210\u4e3a\u5f00\u53d1\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u7684\u9996\u9009I\/O\u6a21\u578b\u4e4b\u4e00\u3002\u5728\u540e\u7eed\u7ae0\u8282\u4e2d&#xff0c;\u6211\u4eec\u5c06\u8fdb\u4e00\u6b65\u63a2\u8ba8IOCP\u7684\u5b9e\u73b0\u7ec6\u8282\u4ee5\u53ca\u5982\u4f55\u5728\u5b9e\u9645\u7684\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u4e2d\u5e94\u7528IOCP\u3002 <\/p>\n<h2> 2. \u7ebf\u7a0b\u6c60\u7684\u4f5c\u7528\u4e0e\u6548\u7387\u63d0\u5347 <\/h2>\n<h3> 2.1 \u7ebf\u7a0b\u6c60\u57fa\u7840\u6982\u5ff5 <\/h3>\n<h4> 2.1.1 \u7ebf\u7a0b\u6c60\u7684\u5b9a\u4e49\u548c\u5de5\u4f5c\u539f\u7406 <\/h4>\n<p> \u7ebf\u7a0b\u6c60\u662f\u4e00\u79cd\u8d44\u6e90\u6c60\u5316\u6280\u672f&#xff0c;\u7528\u4e8e\u7ba1\u7406\u4e00\u7ec4\u53ef\u590d\u7528\u7684\u5de5\u4f5c\u7ebf\u7a0b&#xff0c;\u6267\u884c\u63d0\u4ea4\u7ed9\u6c60\u7684\u4efb\u52a1\u3002\u5176\u6838\u5fc3\u601d\u60f3\u662f\u5229\u7528\u9884\u5148\u521b\u5efa\u7684\u7ebf\u7a0b\u6765\u51cf\u5c11\u7ebf\u7a0b\u521b\u5efa\u548c\u9500\u6bc1\u7684\u5f00\u9500&#xff0c;\u540c\u65f6\u5408\u7406\u8c03\u5ea6\u4efb\u52a1\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002 <\/p>\n<p> \u7ebf\u7a0b\u6c60\u7684\u57fa\u672c\u5de5\u4f5c\u539f\u7406\u4e3a&#xff1a;  1. \u521d\u59cb\u5316\u4e00\u5b9a\u6570\u91cf\u7684\u5de5\u4f5c\u7ebf\u7a0b&#xff0c;\u8fd9\u4e9b\u7ebf\u7a0b\u5904\u4e8e\u5f85\u547d\u72b6\u6001\u3002  2. \u5f53\u63d0\u4ea4\u4e00\u4e2a\u65b0\u4efb\u52a1\u65f6&#xff0c;\u6c60\u4e2d\u7684\u7a7a\u95f2\u7ebf\u7a0b\u5c06\u88ab\u5524\u9192&#xff0c;\u53d6\u8d70\u4efb\u52a1\u5e76\u6267\u884c\u3002  3. \u82e5\u6240\u6709\u5de5\u4f5c\u7ebf\u7a0b\u90fd\u5728\u5fd9\u788c&#xff0c;\u65b0\u4efb\u52a1\u5c06\u88ab\u653e\u5165\u961f\u5217\u4e2d\u7b49\u5f85&#xff0c;\u76f4\u5230\u6709\u7ebf\u7a0b\u7a7a\u95f2\u3002  4. \u4efb\u52a1\u5b8c\u6210\u540e&#xff0c;\u5de5\u4f5c\u7ebf\u7a0b\u5c06\u8fd4\u56de\u5f85\u547d\u72b6\u6001&#xff0c;\u7b49\u5f85\u63a5\u6536\u65b0\u7684\u4efb\u52a1\u3002 <\/p>\n<h4> 2.1.2 \u7ebf\u7a0b\u6c60\u7684\u7ec4\u6210\u548c\u7c7b\u578b <\/h4>\n<p> \u7ebf\u7a0b\u6c60\u4e3b\u8981\u7531\u4ee5\u4e0b\u51e0\u4e2a\u7ec4\u4ef6\u7ec4\u6210&#xff1a;  &#8211;  \u4efb\u52a1\u961f\u5217  &#xff1a;\u5b58\u50a8\u7b49\u5f85\u6267\u884c\u7684\u4efb\u52a1\u3002  &#8211;  \u5de5\u4f5c\u7ebf\u7a0b  &#xff1a;\u6267\u884c\u4ece\u4efb\u52a1\u961f\u5217\u4e2d\u53d6\u51fa\u7684\u4efb\u52a1\u3002  &#8211;  \u7ebf\u7a0b\u6c60\u63a7\u5236\u5668  &#xff1a;\u7ba1\u7406\u6574\u4e2a\u7ebf\u7a0b\u6c60\u7684\u751f\u547d\u5468\u671f&#xff0c;\u5305\u62ec\u7ebf\u7a0b\u7684\u521b\u5efa\u3001\u4efb\u52a1\u5206\u914d\u3001\u7ebf\u7a0b\u7684\u56de\u6536\u7b49\u3002  &#8211;  \u5de5\u4f5c\u961f\u5217  &#xff1a;\u7ba1\u7406\u7ebf\u7a0b\u6267\u884c\u5b8c\u4efb\u52a1\u540e\u7684\u8fd4\u56de\u3002 <\/p>\n<p> \u6839\u636e\u5176\u7ba1\u7406\u673a\u5236\u548c\u5b9e\u73b0\u65b9\u5f0f&#xff0c;\u7ebf\u7a0b\u6c60\u901a\u5e38\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u51e0\u79cd\u7c7b\u578b&#xff1a;  &#8211;  \u56fa\u5b9a\u5927\u5c0f\u7684\u7ebf\u7a0b\u6c60  &#xff1a;\u521b\u5efa\u65f6\u6307\u5b9a\u4e86\u7ebf\u7a0b\u6570&#xff0c;\u4e0d\u4f1a\u56e0\u4efb\u52a1\u91cf\u7684\u53d8\u5316\u800c\u6539\u53d8\u3002  &#8211;  \u53ef\u4f38\u7f29\u7ebf\u7a0b\u6c60  &#xff1a;\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u91cf\u4f1a\u6839\u636e\u4efb\u52a1\u7684\u5927\u5c0f\u52a8\u6001\u8c03\u6574\u3002  &#8211;  \u5355\u7ebf\u7a0b\u6c60  &#xff1a;\u6574\u4e2a\u7ebf\u7a0b\u6c60\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b&#xff0c;\u4fdd\u8bc1\u4e86\u4efb\u52a1\u7684\u4e32\u884c\u6267\u884c\u3002  &#8211;  \u5de5\u4f5c\u7a83\u53d6\u7ebf\u7a0b\u6c60  &#xff1a;\u7ebf\u7a0b\u6c60\u5141\u8bb8\u5de5\u4f5c\u7ebf\u7a0b\u4ece\u5176\u4ed6\u7ebf\u7a0b\u7684\u961f\u5217\u4e2d\u201c\u7a83\u53d6\u201d\u4efb\u52a1\u6765\u6267\u884c\u3002 <\/p>\n<h3> 2.2 \u7ebf\u7a0b\u6c60\u5728\u63d0\u5347\u6548\u7387\u4e0a\u7684\u4f5c\u7528 <\/h3>\n<h4> 2.2.1 \u51cf\u5c11\u7ebf\u7a0b\u521b\u5efa\u548c\u9500\u6bc1\u7684\u5f00\u9500 <\/h4>\n<p> \u521b\u5efa\u7ebf\u7a0b\u662f\u4e00\u9879\u6210\u672c\u8f83\u9ad8\u7684\u64cd\u4f5c&#xff0c;\u5b83\u6d89\u53ca\u5230\u5185\u5b58\u5206\u914d\u3001\u5806\u6808\u521d\u59cb\u5316\u4ee5\u53ca\u7ebf\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362\u7b49\u4e00\u7cfb\u5217\u590d\u6742\u7684\u7cfb\u7edf\u8c03\u7528\u3002\u7ebf\u7a0b\u6c60\u901a\u8fc7\u590d\u7528\u73b0\u6709\u7ebf\u7a0b\u6765\u907f\u514d\u8fd9\u4e9b\u5f00\u9500\u3002\u5f53\u4efb\u52a1\u5230\u8fbe\u65f6&#xff0c;\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u7acb\u5373\u5206\u914d\u4e00\u4e2a\u5df2\u7ecf\u521b\u5efa\u7684\u7ebf\u7a0b\u6765\u6267\u884c\u4efb\u52a1&#xff0c;\u907f\u514d\u4e86\u521b\u5efa\u65b0\u7ebf\u7a0b\u7684\u8017\u65f6\u64cd\u4f5c\u3002 <\/p>\n<h4> 2.2.2 \u4efb\u52a1\u8c03\u5ea6\u548c\u8d1f\u8f7d\u5747\u8861 <\/h4>\n<p> \u7ebf\u7a0b\u6c60\u7ba1\u7406\u5668\u8d1f\u8d23\u5206\u914d\u4efb\u52a1\u7ed9\u7a7a\u95f2\u7ebf\u7a0b&#xff0c;\u8fd9\u6837\u5c31\u5b9e\u73b0\u4e86\u8d1f\u8f7d\u5747\u8861\u3002\u5728\u9ad8\u8d1f\u8f7d\u60c5\u51b5\u4e0b&#xff0c;\u591a\u4e2a\u4efb\u52a1\u53ef\u80fd\u4f1a\u540c\u65f6\u5230\u8fbe&#xff0c;\u7ebf\u7a0b\u6c60\u80fd\u591f\u6839\u636e\u5f53\u524d\u7ebf\u7a0b\u7684\u5fd9\u788c\u72b6\u6001\u5408\u7406\u8c03\u5ea6&#xff0c;\u4f7f\u5f97\u6240\u6709\u7ebf\u7a0b\u90fd\u80fd\u5c3d\u53ef\u80fd\u5747\u5300\u5730\u5206\u62c5\u5de5\u4f5c\u91cf&#xff0c;\u907f\u514d\u67d0\u4e9b\u7ebf\u7a0b\u8fc7\u4e8e\u5fd9\u788c\u800c\u5176\u5b83\u7ebf\u7a0b\u7a7a\u95f2\u7684\u60c5\u51b5\u3002 <\/p>\n<h4> 2.2.3 \u8d44\u6e90\u590d\u7528\u4e0e\u6027\u80fd\u4f18\u5316 <\/h4>\n<p> \u901a\u8fc7\u590d\u7528\u7ebf\u7a0b\u8d44\u6e90&#xff0c;\u7ebf\u7a0b\u6c60\u51cf\u5c11\u4e86\u5185\u5b58\u6d88\u8017&#xff0c;\u5e76\u4e14\u63d0\u5347\u4e86\u8d44\u6e90\u5229\u7528\u7387\u3002\u53e6\u5916&#xff0c;\u7ebf\u7a0b\u6c60\u5bf9\u7ebf\u7a0b\u8fdb\u884c\u7edf\u4e00\u7ba1\u7406&#xff0c;\u53ef\u4ee5\u63d0\u524d\u8fdb\u884c\u6027\u80fd\u76d1\u63a7\u548c\u8c03\u6574&#xff0c;\u4ece\u800c\u63d0\u5347\u6574\u4f53\u6027\u80fd\u3002\u901a\u8fc7\u7ebf\u7a0b\u6c60&#xff0c;\u6211\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u5e76\u53d1\u6c34\u5e73&#xff0c;\u5b9e\u73b0\u8d44\u6e90\u7684\u6700\u4f18\u914d\u7f6e\u3002 <\/p>\n<p>flowchart TD<br \/>\n    A[\u4efb\u52a1\u63d0\u4ea4] &#8211;&gt; B{\u7ebf\u7a0b\u6c60\u68c0\u67e5}<br \/>\n    B &#8211;&gt;|\u6709\u7a7a\u95f2\u7ebf\u7a0b| C[\u5206\u914d\u4efb\u52a1]<br \/>\n    B &#8211;&gt;|\u65e0\u7a7a\u95f2\u7ebf\u7a0b| D[\u4efb\u52a1\u6392\u961f]<br \/>\n    C &#8211;&gt; E[\u4efb\u52a1\u6267\u884c]<br \/>\n    D &#8211;&gt;|\u6709\u7a7a\u95f2\u7ebf\u7a0b| C<br \/>\n    E &#8211;&gt; F[\u4efb\u52a1\u5b8c\u6210]<br \/>\n    F &#8211;&gt; B<\/p>\n<p> \u5728\u4e0a\u8ff0\u6d41\u7a0b\u56fe\u4e2d&#xff0c;\u53ef\u4ee5\u770b\u5230\u7ebf\u7a0b\u6c60\u5904\u7406\u4efb\u52a1\u7684\u6574\u4e2a\u6d41\u7a0b&#xff0c;\u5f53\u4efb\u52a1\u63d0\u4ea4\u65f6&#xff0c;\u7ebf\u7a0b\u6c60\u4f1a\u68c0\u67e5\u662f\u5426\u6709\u7a7a\u95f2\u7ebf\u7a0b\u3002\u82e5\u6709&#xff0c;\u5219\u76f4\u63a5\u5206\u914d\u4efb\u52a1\u7ed9\u7ebf\u7a0b\u6267\u884c&#xff1b;\u82e5\u65e0&#xff0c;\u5219\u5c06\u4efb\u52a1\u52a0\u5165\u961f\u5217\u7b49\u5f85\u3002\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u540e&#xff0c;\u7ebf\u7a0b\u6c60\u4f1a\u518d\u6b21\u68c0\u67e5\u662f\u5426\u6709\u65b0\u7684\u4efb\u52a1\u9700\u8981\u5904\u7406\u3002 <\/p>\n<p>| \u7ebf\u7a0b\u72b6\u6001   | \u63cf\u8ff0                                             |<br \/>\n| &#8212;&#8212;&#8212;- | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; |<br \/>\n| \u65b0\u521b\u5efa     | \u7ebf\u7a0b\u521a\u521a\u88ab\u521b\u5efa&#xff0c;\u5c1a\u672a\u542f\u52a8                         |<br \/>\n| \u8fd0\u884c       | \u7ebf\u7a0b\u53ef\u4ee5\u6b63\u5728\u6267\u884c\u4efb\u52a1\u6216\u7b49\u5f85\u64cd\u4f5c\u7cfb\u7edf\u5206\u914dCPU\u65f6\u95f4\u7247 |<br \/>\n| \u7b49\u5f85       | \u7ebf\u7a0b\u6b63\u5728\u7b49\u5f85\u67d0\u79cd\u4e8b\u4ef6\u6216\u6761\u4ef6\u53d8\u91cf                   |<br \/>\n| \u8d85\u65f6\u7b49\u5f85   | \u7ebf\u7a0b\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u5185\u7b49\u5f85&#xff0c;\u6216\u8005\u7b49\u5f85\u4e00\u4e2a\u6761\u4ef6\u53d8\u91cf     |<br \/>\n| \u7ec8\u6b62       | \u7ebf\u7a0b\u5df2\u7ecf\u5b8c\u6210\u6267\u884c\u6216\u88ab\u5f3a\u5236\u7ec8\u6b62                     |<\/p>\n<p> \u7ebf\u7a0b\u72b6\u6001\u7684\u7ba1\u7406\u4e5f\u662f\u7ebf\u7a0b\u6c60\u6548\u7387\u7684\u5173\u952e\u3002\u4e0a\u9762\u8868\u683c\u663e\u793a\u4e86\u4e0d\u540c\u7ebf\u7a0b\u72b6\u6001\u7684\u63cf\u8ff0&#xff0c;\u7ebf\u7a0b\u6c60\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u9700\u8981\u5408\u7406\u8c03\u5ea6\u8fd9\u4e9b\u72b6\u6001&#xff0c;\u4ee5\u63d0\u9ad8\u6548\u7387\u3002 <\/p>\n<p> \u4ee3\u7801\u793a\u4f8b&#xff1a; <\/p>\n<p>#include &lt;thread&gt;<br \/>\n#include &lt;mutex&gt;<br \/>\n#include &lt;condition_variable&gt;<br \/>\n#include &lt;queue&gt;<br \/>\n#include &lt;functional&gt;<br \/>\n#include &lt;future&gt;<\/p>\n<p>class ThreadPool {<br \/>\npublic:<br \/>\n    ThreadPool(size_t);<br \/>\n    template&lt;class F, class&#8230; Args&gt;<br \/>\n    auto enqueue(F&amp;&amp; f, Args&amp;&amp;&#8230; args)<br \/>\n        -&gt; std::future&lt;typename std::result_of&lt;F(Args&#8230;)&gt;::type&gt;;<br \/>\n    ~ThreadPool();<br \/>\nprivate:<br \/>\n    \/\/ \u9700\u8981\u8ddf\u8e2a\u7ebf\u7a0b\u7684\u7c7b\u578b<br \/>\n    using Task &#061; std::function&lt;void()&gt;;<br \/>\n    \/\/ \u542f\u52a8\u4e00\u5b9a\u6570\u91cf\u7684\u5de5\u4f5c\u7ebf\u7a0b<br \/>\n    void workers();<br \/>\n    \/\/ \u6267\u884c\u4efb\u52a1\u7684\u51fd\u6570<br \/>\n    void workerThread();<br \/>\n    \/\/ \u961f\u5217\u4e2d\u5b58\u50a8\u5f85\u5904\u7406\u7684\u4efb\u52a1<br \/>\n    std::queue&lt;Task&gt; tasks;<\/p>\n<p>    \/\/ \u540c\u6b65<br \/>\n    std::mutex queueMutex;<br \/>\n    std::condition_variable condition;<br \/>\n    bool stop;<br \/>\n    std::vector&lt;std::thread&gt; workers;<br \/>\n};<\/p>\n<p> \u4ee5\u4e0a\u4ee3\u7801\u5c55\u793a\u4e86\u7ebf\u7a0b\u6c60\u7684\u4e00\u4e2a\u7b80\u5316\u5b9e\u73b0\u7684\u6846\u67b6&#xff0c;\u5176\u4e2d\u5305\u542b\u4e86\u5de5\u4f5c\u7ebf\u7a0b\u7684\u542f\u52a8\u3001\u4efb\u52a1\u961f\u5217\u7684\u7ba1\u7406\u3001\u5de5\u4f5c\u51fd\u6570\u7684\u6267\u884c\u7b49\u5173\u952e\u90e8\u5206\u3002\u6bcf\u4e2a\u51fd\u6570\u548c\u7c7b\u6210\u5458\u53d8\u91cf\u90fd\u9700\u8981\u4ed4\u7ec6\u8bbe\u8ba1&#xff0c;\u4ee5\u786e\u4fdd\u7ebf\u7a0b\u6c60\u7684\u9ad8\u6548\u548c\u7a33\u5b9a\u3002 <\/p>\n<p> \u4ee5\u4e0a\u7ae0\u8282\u6df1\u5165\u63a2\u8ba8\u4e86\u7ebf\u7a0b\u6c60\u7684\u57fa\u7840\u6982\u5ff5\u53ca\u5176\u5728\u6548\u7387\u63d0\u5347\u65b9\u9762\u7684\u4f5c\u7528\u3002\u63a5\u4e0b\u6765\u7684\u7ae0\u8282\u5c06\u4f1a\u8be6\u7ec6\u5206\u6790\u7ebf\u7a0b\u6c60\u5728\u4e0d\u540c\u7c7b\u578b\u4efb\u52a1\u4e2d\u7684\u5e94\u7528&#xff0c;\u4ee5\u53ca\u5982\u4f55\u8fdb\u884c\u53c2\u6570\u8c03\u4f18\u548c\u76d1\u63a7\u3002 <\/p>\n<h2> 3. IOCP\u5728\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u4e2d\u7684\u5e94\u7528 <\/h2>\n<h3> 3.1 IOCP\u4e0e\u9ad8\u5e76\u53d1 <\/h3>\n<h4> 3.1.1 \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u7684\u6311\u6218 <\/h4>\n<p> \u968f\u7740\u4e92\u8054\u7f51\u7684\u5feb\u901f\u53d1\u5c55&#xff0c;\u7528\u6237\u5bf9\u5728\u7ebf\u670d\u52a1\u7684\u54cd\u5e94\u65f6\u95f4\u8981\u6c42\u8d8a\u6765\u8d8a\u9ad8&#xff0c;\u670d\u52a1\u5668\u5fc5\u987b\u80fd\u591f\u540c\u65f6\u5904\u7406\u6210\u5343\u4e0a\u4e07\u7684\u5e76\u53d1\u8fde\u63a5\u3002\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u9762\u4e34\u7684\u6311\u6218\u5728\u4e8e\u5982\u4f55\u6709\u6548\u7ba1\u7406\u8fd9\u4e9b\u5e76\u53d1\u8fde\u63a5&#xff0c;\u4ee5\u53ca\u5982\u4f55\u9ad8\u6548\u5730\u5904\u7406\u6bcf\u4e2a\u8fde\u63a5\u4e0a\u7684I\/O\u64cd\u4f5c\u3002\u968f\u7740\u8fde\u63a5\u6570\u7684\u589e\u52a0&#xff0c;\u4f20\u7edf\u7684\u540c\u6b65I\/O\u6a21\u578b\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u8d44\u6e90\u7684\u5927\u91cf\u6d88\u8017&#xff0c;\u7279\u522b\u662f\u5728CPU\u548c\u7ebf\u7a0b\u4f7f\u7528\u65b9\u9762&#xff0c;\u8fd9\u5c06\u663e\u8457\u964d\u4f4e\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u3002\u56e0\u6b64&#xff0c;\u8bbe\u8ba1\u4e00\u4e2a\u80fd\u591f\u5728\u4fdd\u6301\u4f4e\u8d44\u6e90\u6d88\u8017\u7684\u540c\u65f6\u5904\u7406\u9ad8\u5e76\u53d1\u8fde\u63a5\u7684\u670d\u52a1\u5668\u67b6\u6784&#xff0c;\u662f\u63d0\u9ad8\u670d\u52a1\u8d28\u91cf\u548c\u7528\u6237\u4f53\u9a8c\u7684\u5173\u952e\u3002 <\/p>\n<h4> 3.1.2 IOCP\u5982\u4f55\u89e3\u51b3\u9ad8\u5e76\u53d1\u95ee\u9898 <\/h4>\n<p> IO\u5b8c\u6210\u7aef\u53e3(IOCP)\u6a21\u578b\u901a\u8fc7\u5176\u72ec\u7279\u7684\u8bbe\u8ba1\u673a\u5236\u89e3\u51b3\u4e86\u4e0a\u8ff0\u95ee\u9898\u3002IOCP\u5141\u8bb8\u4e00\u4e2a\u7ebf\u7a0b\u540c\u65f6\u7b49\u5f85\u591a\u4e2aI\/O\u64cd\u4f5c\u5b8c\u6210\u3002\u8fd9\u610f\u5473\u7740\u670d\u52a1\u5668\u53ef\u4ee5\u5728\u4e00\u4e2a\u6216\u5c11\u91cf\u7ebf\u7a0b\u4e2d\u5904\u7406\u5927\u91cfI\/O\u8bf7\u6c42&#xff0c;\u8fd9\u5728\u8d44\u6e90\u6d88\u8017\u548c\u6027\u80fd\u65b9\u9762\u6bd4\u4f20\u7edf\u7684\u591a\u7ebf\u7a0b\u6a21\u578b\u8981\u9ad8\u6548\u5f97\u591a\u3002\u5728Windows\u5e73\u53f0\u4e0a&#xff0c;IOCP\u901a\u5e38\u4e0e\u91cd\u53e0I\/O&#xff08;Overlapped I\/O&#xff09;\u4e00\u8d77\u4f7f\u7528&#xff0c;\u4f7f\u5f97I\/O\u64cd\u4f5c\u5728\u4e0d\u963b\u585e\u7ebf\u7a0b\u7684\u60c5\u51b5\u4e0b\u5f02\u6b65\u6267\u884c\u3002 <\/p>\n<p> IOCP\u6a21\u578b\u4e2d&#xff0c;\u6bcf\u5f53\u4e00\u4e2aI\/O\u8bf7\u6c42\u5b8c\u6210\u65f6&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5c06\u8be5\u5b8c\u6210\u7684I\/O\u8bf7\u6c42\u653e\u5165\u961f\u5217\u4e2d\u3002\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u53ef\u4ee5\u8f6e\u8be2\u8fd9\u4e2a\u961f\u5217&#xff0c;\u53d6\u51fa\u5b8c\u6210\u7684I\/O\u8bf7\u6c42\u5e76\u5bf9\u5176\u8fdb\u884c\u540e\u7eed\u5904\u7406&#xff0c;\u800c\u4e0d\u9700\u8981\u4e3a\u6bcf\u4e2aI\/O\u64cd\u4f5c\u521b\u5efa\u65b0\u7684\u7ebf\u7a0b\u3002\u8fd9\u79cd\u673a\u5236\u6781\u5927\u5730\u63d0\u9ad8\u4e86\u670d\u52a1\u5668\u5904\u7406\u5927\u91cf\u5e76\u53d1\u8fde\u63a5\u7684\u80fd\u529b&#xff0c;\u540c\u65f6\u907f\u514d\u4e86\u7ebf\u7a0b\u521b\u5efa\u548c\u9500\u6bc1\u5e26\u6765\u7684\u9ad8\u5f00\u9500\u3002 <\/p>\n<h4> 3.2 IOCP\u7684\u5b9e\u9645\u5e94\u7528\u573a\u666f <\/h4>\n<h5> 3.2.1 \u5b9e\u65f6\u901a\u4fe1\u670d\u52a1\u5668 <\/h5>\n<p> \u5b9e\u65f6\u901a\u4fe1\u670d\u52a1\u5668&#xff0c;\u5982\u5728\u7ebf\u804a\u5929\u5ba4\u3001\u591a\u4eba\u5728\u7ebf\u6e38\u620f\u548c\u5728\u7ebf\u534f\u4f5c\u5de5\u5177&#xff0c;\u9700\u8981\u5feb\u901f\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u4ee5\u4fdd\u6301\u901a\u4fe1\u7684\u5b9e\u65f6\u6027\u548c\u6d41\u7545\u6027\u3002IOCP\u6a21\u578b\u7684\u9ad8\u6548I\/O\u5904\u7406\u80fd\u529b&#xff0c;\u4f7f\u4e4b\u6210\u4e3a\u8fd9\u7c7b\u670d\u52a1\u5668\u7684\u7406\u60f3\u9009\u62e9\u3002\u4f7f\u7528IOCP&#xff0c;\u670d\u52a1\u5668\u53ef\u4ee5\u5728\u4fdd\u6301\u5927\u91cf\u5e76\u53d1\u8fde\u63a5\u7684\u540c\u65f6&#xff0c;\u4f9d\u7136\u4fdd\u8bc1\u4f4e\u5ef6\u8fdf\u5730\u5904\u7406\u548c\u8f6c\u53d1\u6d88\u606f\u3002 <\/p>\n<h5> 3.2.2 \u5927\u6570\u636e\u5904\u7406\u670d\u52a1\u5668 <\/h5>\n<p> \u5728\u5927\u6570\u636e\u5904\u7406\u670d\u52a1\u5668\u4e2d&#xff0c;\u6bd4\u5982\u5206\u5e03\u5f0f\u8ba1\u7b97\u5e73\u53f0\u548c\u6570\u636e\u4ed3\u5e93&#xff0c;\u5904\u7406\u5927\u91cf\u6570\u636e\u8bfb\u5199\u548c\u8ba1\u7b97\u4efb\u52a1\u662f\u5e38\u6001\u3002IOCP\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8fd9\u4e9b\u4efb\u52a1\u7684I\/O\u64cd\u4f5c&#xff0c;\u786e\u4fdd\u6570\u636e\u9ad8\u6548\u5730\u5728\u5404\u8282\u70b9\u4e4b\u95f4\u6d41\u52a8\u3002\u6b64\u5916&#xff0c;\u7531\u4e8eIOCP\u5bf9\u7f51\u7edc\u8fde\u63a5\u6570\u6ca1\u6709\u9650\u5236&#xff0c;\u670d\u52a1\u5668\u80fd\u591f\u7075\u6d3b\u5730\u6269\u5c55\u4ee5\u5e94\u5bf9\u589e\u957f\u7684\u6570\u636e\u5904\u7406\u9700\u6c42&#xff0c;\u8fd9\u5bf9\u4e8e\u5927\u6570\u636e\u670d\u52a1\u5668\u6765\u8bf4\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002 <\/p>\n<h3> 3.2 IOCP\u7684\u5b9e\u9645\u5e94\u7528\u573a\u666f <\/h3>\n<h4> 3.2.1 \u5b9e\u65f6\u901a\u4fe1\u670d\u52a1\u5668 <\/h4>\n<p> \u5b9e\u65f6\u901a\u4fe1\u670d\u52a1\u5668\u9700\u8981\u4ee5\u6781\u4f4e\u7684\u5ef6\u8fdf\u5904\u7406\u5927\u91cf\u7684\u7f51\u7edcI\/O\u4e8b\u4ef6\u3002IOCP\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9ad8\u6548\u7684\u5e76\u53d1\u5904\u7406\u673a\u5236&#xff0c;\u4f7f\u5f97\u5b9e\u65f6\u901a\u4fe1\u670d\u52a1\u5668\u80fd\u591f\u66f4\u597d\u5730\u6ee1\u8db3\u7528\u6237\u5bf9\u5373\u65f6\u6027\u7684\u8981\u6c42\u3002\u4ee5\u4e0b\u662fIOCP\u5728\u5b9e\u65f6\u901a\u4fe1\u670d\u52a1\u5668\u4e2d\u7684\u5e94\u7528\u5b9e\u4f8b&#xff1a; <\/p>\n<p>\/\/ C&#043;&#043; \u4f7f\u7528 IOCP \u7684\u4f2a\u4ee3\u7801\u793a\u4f8b<br \/>\nHANDLE hIOCP &#061; CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);<br \/>\nfor(int i &#061; 0; i &lt; numberOfThreads; i&#043;&#043;)<br \/>\n{<br \/>\n    CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)IOCPThreadFunction, hIOCP, 0, NULL);<br \/>\n}<\/p>\n<p>\/\/ \u5904\u7406\u6bcf\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5<br \/>\nSOCKET clientSocket &#061; accept(serverSocket, &#8230;);<br \/>\nCreateIoCompletionPort((HANDLE)clientSocket, hIOCP, 0, 0);<\/p>\n<p>\/\/ \u5f02\u6b65\u8bfb\u5199\u64cd\u4f5c<br \/>\nWSARecv(&#8230;, &amp;overlapped);<br \/>\nWSASend(&#8230;, &amp;overlapped);<\/p>\n<p> \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;\u670d\u52a1\u5668\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684\u5b8c\u6210\u7aef\u53e3&#xff0c;\u5e76\u5c06\u5176\u4e0e\u670d\u52a1\u5668\u7684\u5168\u5c40\u5b8c\u6210\u7aef\u53e3\u5173\u8054\u3002\u5f53I\/O\u64cd\u4f5c\u5b8c\u6210\u65f6&#xff0c;\u64cd\u4f5c\u7ed3\u679c\u88ab\u653e\u5165\u5230\u5168\u5c40\u5b8c\u6210\u7aef\u53e3\u7684\u961f\u5217\u4e2d&#xff0c;\u7531\u5de5\u4f5c\u7ebf\u7a0b\u4ece\u4e2d\u83b7\u53d6\u5e76\u5904\u7406\u3002 <\/p>\n<h4> 3.2.2 \u5927\u6570\u636e\u5904\u7406\u670d\u52a1\u5668 <\/h4>\n<p> \u5927\u6570\u636e\u5904\u7406\u670d\u52a1\u5668\u5f80\u5f80\u9700\u8981\u8bfb\u5199\u5927\u91cf\u7684\u6570\u636e&#xff0c;IOCP\u5728\u8fd9\u91cc\u53ef\u4ee5\u4f5c\u4e3a\u6570\u636e\u7ba1\u9053\u7684\u4e00\u90e8\u5206&#xff0c;\u6709\u6548\u63d0\u9ad8\u8bfb\u5199\u6548\u7387\u3002\u4ee5\u4e0b\u4e3a\u4e00\u4e2a\u5927\u6570\u636e\u5904\u7406\u573a\u666f\u4e0b\u4f7f\u7528IOCP\u7684\u4f2a\u4ee3\u7801\u793a\u4f8b&#xff1a; <\/p>\n<p>\/\/ C&#043;&#043; \u4f7f\u7528 IOCP \u8fdb\u884c\u5927\u89c4\u6a21\u6570\u636e\u8bfb\u53d6<br \/>\nHANDLE hIOCP &#061; CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);<br \/>\n\/\/ \u5047\u8bbe\u6709\u4e00\u4e2a\u8f93\u5165\u6587\u4ef6\u6d41&#xff0c;\u5982ifstream<br \/>\nifstream file(&#034;large_input_data.bin&#034;, ios::binary);<\/p>\n<p>\/\/ \u521b\u5efa\u5f02\u6b65\u8bfb\u64cd\u4f5c<br \/>\nasync_read(file, buffer, size, &amp;overlapped);<\/p>\n<p>\/\/ IOCP\u7ebf\u7a0b\u51fd\u6570\u5904\u7406\u5b8c\u6210\u7684I\/O\u64cd\u4f5c<br \/>\nDWORD numberOfBytesTransfered;<br \/>\nOVERLAPPED* overlapped;<\/p>\n<p>while(GetQueuedCompletionStatus(hIOCP, &amp;numberOfBytesTransfered, (PULONG_PTR)&amp;overlapped, NULL, INFINITE))<br \/>\n{<br \/>\n    \/\/ \u68c0\u67e5\u5e76\u5904\u7406\u8bfb\u5165\u7684\u6570\u636e<br \/>\n    if(overlapped-&gt;Offset &#061;&#061; LARGE_INPUT_FILE_SIZE)<br \/>\n    {<br \/>\n        \/\/ \u6570\u636e\u8bfb\u53d6\u5b8c\u6210&#xff0c;\u8fdb\u884c\u540e\u7eed\u5904\u7406&#8230;<br \/>\n    }<br \/>\n}<\/p>\n<p> \u5728\u8fd9\u4e2a\u573a\u666f\u4e2d&#xff0c;\u4f7f\u7528IOCP\u6765\u5f02\u6b65\u8bfb\u53d6\u5927\u89c4\u6a21\u6570\u636e&#xff0c;\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u963b\u585e\u4e3b\u7ebf\u7a0b&#xff0c;\u4ece\u800c\u8ba9\u4e3b\u670d\u52a1\u5668\u80fd\u591f\u6301\u7eed\u8fdb\u884c\u5176\u4ed6\u64cd\u4f5c&#xff0c;\u63d0\u5347\u6574\u4f53\u6548\u7387\u3002 <\/p>\n<h3> 3.3 IOCP\u5728\u5176\u4ed6\u573a\u666f\u4e2d\u7684\u5e94\u7528 <\/h3>\n<h4> 3.3.1 \u4e91\u5b58\u50a8\u670d\u52a1 <\/h4>\n<p> \u4e91\u5b58\u50a8\u670d\u52a1\u9700\u8981\u5904\u7406\u5927\u91cf\u7684\u6587\u4ef6\u4e0a\u4f20\u548c\u4e0b\u8f7d\u8bf7\u6c42\u3002IOCP\u53ef\u4ee5\u7528\u6765\u5f02\u6b65\u7ba1\u7406\u8fd9\u4e9b\u6587\u4ef6I\/O\u64cd\u4f5c&#xff0c;\u4ece\u800c\u63d0\u5347\u6574\u4f53\u670d\u52a1\u6027\u80fd\u3002\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u548c\u524d\u9762\u7684\u4f8b\u5b50\u7c7b\u4f3c&#xff0c;\u901a\u8fc7\u5f02\u6b65\u8bfb\u5199\u6587\u4ef6&#xff0c;\u5e76\u5c06I\/O\u64cd\u4f5c\u5b8c\u6210\u7ed3\u679c\u653e\u5165IOCP\u961f\u5217\u4e2d&#xff0c;\u7531\u5de5\u4f5c\u7ebf\u7a0b\u8fdb\u884c\u5904\u7406\u3002 <\/p>\n<h4> 3.3.2 \u6d41\u5a92\u4f53\u670d\u52a1\u5668 <\/h4>\n<p> \u6d41\u5a92\u4f53\u670d\u52a1\u5668\u9700\u8981\u652f\u6301\u591a\u4e2a\u5e76\u53d1\u7684\u5a92\u4f53\u6570\u636e\u6d41\u7684\u4f20\u8f93\u3002IOCP\u53ef\u88ab\u7528\u6765\u5f02\u6b65\u63a5\u6536\u548c\u53d1\u9001\u6570\u636e\u6d41&#xff0c;\u4fdd\u8bc1\u5a92\u4f53\u64ad\u653e\u7684\u6d41\u7545\u6027\u3002\u670d\u52a1\u5668\u80fd\u591f\u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u6d41\u5feb\u901f\u63a8\u9001\u7ed9\u5ba2\u6237\u7aef&#xff0c;\u540c\u65f6\u4e5f\u80fd\u591f\u9ad8\u6548\u5904\u7406\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u4e0a\u4f20\u8bf7\u6c42\u3002 <\/p>\n<h4> 3.3.3 \u5206\u5e03\u5f0f\u7f13\u5b58\u7cfb\u7edf <\/h4>\n<p> \u5728\u5206\u5e03\u5f0f\u7f13\u5b58\u7cfb\u7edf\u4e2d&#xff0c;IOCP\u7528\u4e8e\u4f18\u5316\u7f13\u5b58\u7684\u6570\u636e\u8bfb\u5199\u64cd\u4f5c\u3002\u7531\u4e8e\u7f13\u5b58\u7cfb\u7edf\u9700\u8981\u5904\u7406\u5927\u91cf\u7684\u77ed\u8fde\u63a5\u8bf7\u6c42&#xff0c;IOCP\u80fd\u591f\u51cf\u5c11\u7ebf\u7a0b\u5207\u6362\u7684\u5f00\u9500&#xff0c;\u63d0\u9ad8\u7f13\u5b58\u7cfb\u7edf\u7684\u541e\u5410\u91cf\u548c\u54cd\u5e94\u901f\u5ea6\u3002 <\/p>\n<h3> 3.4 \u5c0f\u7ed3 <\/h3>\n<p> \u5728\u672c\u7ae0\u8282\u4e2d&#xff0c;\u6211\u4eec\u6df1\u5165\u63a2\u8ba8\u4e86IOCP\u5728\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u4e2d\u7684\u5b9e\u9645\u5e94\u7528&#xff0c;\u4ee5\u53ca\u5b83\u5982\u4f55\u5728\u5404\u79cd\u670d\u52a1\u5668\u573a\u666f\u4e2d\u53d1\u6325\u5176\u9ad8\u6548\u5904\u7406\u5e76\u53d1I\/O\u4e8b\u4ef6\u7684\u4f18\u52bf\u3002IOCP\u6a21\u578b\u901a\u8fc7\u51cf\u5c11\u7ebf\u7a0b\u521b\u5efa\u548c\u9500\u6bc1\u7684\u5f00\u9500&#xff0c;\u5b9e\u73b0\u4efb\u52a1\u8c03\u5ea6\u548c\u8d1f\u8f7d\u5747\u8861&#xff0c;\u4ee5\u53ca\u8d44\u6e90\u590d\u7528\u4e0e\u6027\u80fd\u4f18\u5316&#xff0c;\u4e3a\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u652f\u6301\u3002\u5728\u540e\u7eed\u7ae0\u8282\u4e2d&#xff0c;\u6211\u4eec\u5c06\u8fdb\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u901a\u8fc7\u7ebf\u7a0b\u6c60\u8fdb\u4e00\u6b65\u63d0\u5347\u4efb\u52a1\u5904\u7406\u7684\u6548\u7387\u3002 <\/p>\n<h2> 4. \u7ebf\u7a0b\u6c60\u5728\u4efb\u52a1\u5904\u7406\u4e2d\u7684\u5e94\u7528 <\/h2>\n<p> \u5728\u7ebf\u7a0b\u6c60\u7684\u5e94\u7528\u4e2d&#xff0c;\u6b63\u786e\u5730\u9009\u62e9\u548c\u8c03\u6574\u53c2\u6570\u662f\u5b9e\u73b0\u9ad8\u6548\u4efb\u52a1\u5904\u7406\u7684\u5173\u952e\u3002\u65e0\u8bba\u662f\u5904\u7406I\/O\u5bc6\u96c6\u578b\u8fd8\u662fCPU\u5bc6\u96c6\u578b\u4efb\u52a1&#xff0c;\u751a\u81f3\u662f\u5728\u73b0\u4ee3\u8ba1\u7b97\u73af\u5883\u4e2d\u65e5\u76ca\u666e\u904d\u7684\u6df7\u5408\u578b\u4efb\u52a1&#xff0c;\u7ebf\u7a0b\u6c60\u7684\u4f7f\u7528\u90fd\u81f3\u5173\u91cd\u8981\u3002 <\/p>\n<h3> 4.1 \u7ebf\u7a0b\u6c60\u5728\u4e0d\u540c\u7c7b\u578b\u4efb\u52a1\u4e2d\u7684\u5e94\u7528 <\/h3>\n<h4> 4.1.1 I\/O\u5bc6\u96c6\u578b\u4efb\u52a1 <\/h4>\n<p> I\/O\u5bc6\u96c6\u578b\u4efb\u52a1\u4e3b\u8981\u53d7\u5230I\/O\u64cd\u4f5c\u7684\u9650\u5236&#xff0c;\u8fd9\u7c7b\u4efb\u52a1\u901a\u5e38\u4f1a\u82b1\u8d39\u5927\u91cf\u65f6\u95f4\u7b49\u5f85\u6570\u636e\u4ece\u78c1\u76d8\u6216\u7f51\u7edc\u7b49\u8bbe\u5907\u8bfb\u53d6\u6216\u5199\u5165\u3002\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u53ef\u4ee5\u5feb\u901f\u5730\u5728\u7b49\u5f85I\/O\u64cd\u4f5c\u5b8c\u6210\u65f6\u5207\u6362\u5230\u5176\u4ed6\u4efb\u52a1\u4e0a&#xff0c;\u8fd9\u6837\u53ef\u4ee5\u6700\u5927\u5316CPU\u7684\u5229\u7528\u7387&#xff0c;\u540c\u65f6\u907f\u514d\u7ebf\u7a0b\u957f\u65f6\u95f4\u7a7a\u95f2\u3002 <\/p>\n<ul>\n<li>  \u5e94\u7528\u793a\u4f8b&#xff1a;  \u5728Web\u670d\u52a1\u5668\u4e2d\u5904\u7406\u6587\u4ef6\u4e0a\u4f20\u6216\u4e0b\u8f7d\u8bf7\u6c42&#xff0c;\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u53ef\u4ee5\u88ab\u7528\u4e8e\u7b49\u5f85\u5ba2\u6237\u7aef\u7684\u6570\u636e&#xff0c;\u540c\u65f6\u5176\u4ed6\u7ebf\u7a0b\u5904\u7406\u5176\u4ed6\u8bf7\u6c42\u3002 <\/li>\n<li>  \u4f18\u5316\u7b56\u7565&#xff1a;  \u7ebf\u7a0b\u6c60\u7684\u5927\u5c0f\u901a\u5e38\u4f1a\u8bbe\u7f6e\u5f97\u6bd4CPU\u6838\u5fc3\u6570\u591a\u4e00\u4e9b&#xff0c;\u4ee5\u4fbf\u5728I\/O\u64cd\u4f5c\u7b49\u5f85\u65f6&#xff0c;CPU\u4e0d\u4f1a\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\u3002 <\/li>\n<\/ul>\n<h4> 4.1.2 CPU\u5bc6\u96c6\u578b\u4efb\u52a1 <\/h4>\n<p> CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u4e3b\u8981\u7531\u8ba1\u7b97\u64cd\u4f5c\u7ec4\u6210&#xff0c;\u8fd9\u7c7b\u4efb\u52a1\u9700\u8981\u5927\u91cfCPU\u65f6\u95f4\u3002\u5728CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u4e2d&#xff0c;\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u662f\u5c3d\u53ef\u80fd\u5730\u8ba9CPU\u6ee1\u8d1f\u8377\u5de5\u4f5c&#xff0c;\u800c\u4e0d\u662f\u7b49\u5f85I\/O\u64cd\u4f5c\u3002 <\/p>\n<ul>\n<li>  \u5e94\u7528\u793a\u4f8b&#xff1a;  \u5728\u56fe\u50cf\u5904\u7406\u5e94\u7528\u7a0b\u5e8f\u4e2d&#xff0c;\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u7528\u6765\u6267\u884c\u590d\u6742\u7684\u56fe\u50cf\u8f6c\u6362\u4efb\u52a1&#xff0c;\u5982\u8c03\u6574\u5927\u5c0f\u6216\u6ee4\u955c\u6548\u679c\u3002 <\/li>\n<li>  \u4f18\u5316\u7b56\u7565&#xff1a;  \u5bf9\u4e8eCPU\u5bc6\u96c6\u578b\u4efb\u52a1&#xff0c;\u7ebf\u7a0b\u6c60\u7684\u5927\u5c0f\u4e00\u822c\u8bbe\u7f6e\u4e3aCPU\u6838\u5fc3\u6570\u6216\u7a0d\u9ad8\u4e00\u70b9&#xff0c;\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u4e0a\u4e0b\u6587\u5207\u6362\u7684\u5f00\u9500&#xff0c;\u786e\u4fdd\u6bcf\u4e2a\u6838\u5fc3\u90fd\u80fd\u5c3d\u53ef\u80fd\u5730\u5fd9\u788c\u3002 <\/li>\n<\/ul>\n<h4> 4.1.3 \u6df7\u5408\u578b\u4efb\u52a1 <\/h4>\n<p> \u6df7\u5408\u578b\u4efb\u52a1\u540c\u65f6\u5305\u542bI\/O\u64cd\u4f5c\u548c\u8ba1\u7b97\u5bc6\u96c6\u7684\u64cd\u4f5c\u3002\u5904\u7406\u8fd9\u7c7b\u4efb\u52a1\u9700\u8981\u4e00\u4e2a\u7075\u6d3b\u7684\u7ebf\u7a0b\u6c60\u914d\u7f6e&#xff0c;\u4ee5\u5e94\u5bf9\u4e0d\u540c\u4efb\u52a1\u7c7b\u578b\u7684\u6027\u80fd\u74f6\u9888\u3002 <\/p>\n<ul>\n<li>  \u5e94\u7528\u793a\u4f8b&#xff1a;  \u5728\u4e00\u4e2aWeb\u5e94\u7528\u4e2d&#xff0c;\u7528\u6237\u53d1\u8d77\u7684\u8bf7\u6c42\u53ef\u80fd\u5305\u62ec\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u6570\u636e&#xff08;I\/O\u5bc6\u96c6\u578b\u4efb\u52a1&#xff09;\u548c\u5bf9\u8fd9\u4e9b\u6570\u636e\u8fdb\u884c\u5904\u7406&#xff08;CPU\u5bc6\u96c6\u578b\u4efb\u52a1&#xff09;\u3002 <\/li>\n<li>  \u4f18\u5316\u7b56\u7565&#xff1a;  \u5bf9\u4e8e\u6df7\u5408\u578b\u4efb\u52a1&#xff0c;\u53ef\u4ee5\u91c7\u7528\u81ea\u9002\u5e94\u7684\u7ebf\u7a0b\u6c60\u5927\u5c0f&#xff0c;\u52a8\u6001\u8c03\u6574\u7ebf\u7a0b\u6570\u91cf\u4ee5\u9002\u5e94\u5f53\u524d\u7684\u5de5\u4f5c\u8d1f\u8f7d\u3002\u53ef\u4ee5\u901a\u8fc7\u76d1\u63a7\u961f\u5217\u957f\u5ea6\u548c\u7ebf\u7a0b\u6c60\u7684\u8d1f\u8f7d\u6765\u505a\u51fa\u8c03\u6574\u3002 <\/li>\n<\/ul>\n<h3> 4.2 \u7ebf\u7a0b\u6c60\u53c2\u6570\u8c03\u4f18\u548c\u76d1\u63a7 <\/h3>\n<h4> 4.2.1 \u7ebf\u7a0b\u6c60\u53c2\u6570\u8c03\u4f18\u7b56\u7565 <\/h4>\n<p> \u4e3a\u4e86\u9002\u5e94\u4e0d\u540c\u7c7b\u578b\u7684\u8d1f\u8f7d&#xff0c;\u7ebf\u7a0b\u6c60\u63d0\u4f9b\u4e86\u591a\u4e2a\u53ef\u914d\u7f6e\u53c2\u6570&#xff0c;\u4e3b\u8981\u5305\u62ec\u6838\u5fc3\u7ebf\u7a0b\u6570\u3001\u6700\u5927\u7ebf\u7a0b\u6570\u3001\u4fdd\u6301\u5b58\u6d3b\u65f6\u95f4\u7b49\u3002\u9488\u5bf9\u4e0d\u540c\u7684\u4efb\u52a1\u7c7b\u578b&#xff0c;\u5408\u7406\u7684\u53c2\u6570\u914d\u7f6e\u53ef\u4ee5\u5e26\u6765\u663e\u8457\u7684\u6027\u80fd\u63d0\u5347\u3002 <\/p>\n<ul>\n<li>  \u6838\u5fc3\u7ebf\u7a0b\u6570&#xff1a;  \u901a\u5e38\u8bbe\u7f6e\u4e3a\u7cfb\u7edf\u6838\u5fc3\u6570\u6216\u7a0d\u5927&#xff0c;\u4ee5\u4fdd\u8bc1CPU\u80fd\u591f\u5145\u5206\u4f7f\u7528\u3002 <\/li>\n<li>  \u6700\u5927\u7ebf\u7a0b\u6570&#xff1a;  \u5e94\u8be5\u6839\u636e\u4efb\u52a1\u7684\u7279\u6027\u6765\u8bbe\u5b9a&#xff0c;\u907f\u514d\u56e0\u7ebf\u7a0b\u6570\u8fc7\u591a\u5bfc\u81f4\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u3002 <\/li>\n<li>  \u4fdd\u6301\u5b58\u6d3b\u65f6\u95f4&#xff1a;  \u63a7\u5236\u7a7a\u95f2\u7ebf\u7a0b\u7684\u5b58\u6d3b\u65f6\u95f4&#xff0c;\u9632\u6b62\u65e0\u9650\u589e\u957f&#xff0c;\u9020\u6210\u8d44\u6e90\u6d6a\u8d39\u3002 <\/li>\n<\/ul>\n<h4> 4.2.2 \u7ebf\u7a0b\u6c60\u76d1\u63a7\u4e0e\u6545\u969c\u8bca\u65ad <\/h4>\n<p> \u5728\u7ebf\u7a0b\u6c60\u8fd0\u884c\u65f6&#xff0c;\u76d1\u63a7\u548c\u6545\u969c\u8bca\u65ad\u662f\u4fdd\u8bc1\u5e94\u7528\u7a0b\u5e8f\u7a33\u5b9a\u8fd0\u884c\u7684\u5173\u952e\u3002\u901a\u8fc7\u76d1\u63a7\u7ebf\u7a0b\u6c60\u7684\u72b6\u6001&#xff0c;\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u53ca\u65f6\u53d1\u73b0\u5e76\u89e3\u51b3\u95ee\u9898\u3002 <\/p>\n<ul>\n<li>  \u76d1\u63a7\u6307\u6807&#xff1a;  \u5305\u62ec\u7ebf\u7a0b\u6c60\u6d3b\u52a8\u7ebf\u7a0b\u6570\u3001\u4efb\u52a1\u961f\u5217\u5927\u5c0f\u3001\u5f53\u524d\u5b8c\u6210\u7684\u4efb\u52a1\u6570\u7b49\u3002 <\/li>\n<li>  \u6545\u969c\u8bca\u65ad&#xff1a;  \u901a\u8fc7\u65e5\u5fd7\u8bb0\u5f55\u548c\u6027\u80fd\u76d1\u63a7\u5de5\u5177\u6765\u8ddf\u8e2a\u5f02\u5e38\u7684\u7ebf\u7a0b\u884c\u4e3a\u3001\u8fc7\u8f7d\u60c5\u51b5\u4ee5\u53ca\u961f\u5217\u963b\u585e\u95ee\u9898\u3002 <\/li>\n<\/ul>\n<p> \u901a\u8fc7\u4ee5\u4e0b\u8868\u683c&#xff0c;\u6211\u4eec\u53ef\u4ee5\u8fdb\u4e00\u6b65\u7406\u89e3\u7ebf\u7a0b\u6c60\u53c2\u6570\u8bbe\u7f6e\u5bf9\u6027\u80fd\u7684\u5f71\u54cd&#xff1a; <\/p>\n<table>\n<tr> \u53c2\u6570  \u63cf\u8ff0  \u5f71\u54cd <\/tr>\n<tbody>\n<tr>\n<td> \u6838\u5fc3\u7ebf\u7a0b\u6570 <\/td>\n<td> \u7ebf\u7a0b\u6c60\u4e2d\u59cb\u7ec8\u5b58\u6d3b\u7684\u7ebf\u7a0b\u6570 <\/td>\n<td> \u9ad8\u4f1a\u5f71\u54cd\u8d44\u6e90\u4f7f\u7528&#xff0c;\u4f4e\u4f1a\u5bfc\u81f4\u9891\u7e41\u7684\u7ebf\u7a0b\u521b\u5efa\u548c\u9500\u6bc1 <\/td>\n<\/tr>\n<tr>\n<td> \u6700\u5927\u7ebf\u7a0b\u6570 <\/td>\n<td> \u7ebf\u7a0b\u6c60\u5141\u8bb8\u7684\u6700\u5927\u7ebf\u7a0b\u6570 <\/td>\n<td> \u9ad8\u53ef\u5904\u7406\u66f4\u591a\u5e76\u53d1\u4efb\u52a1&#xff0c;\u4f46\u4e5f\u53ef\u80fd\u5bfc\u81f4\u8d44\u6e90\u7ade\u4e89 <\/td>\n<\/tr>\n<tr>\n<td> \u4fdd\u6301\u5b58\u6d3b\u65f6\u95f4 <\/td>\n<td> \u7a7a\u95f2\u7ebf\u7a0b\u5b58\u6d3b\u7684\u6700\u5927\u65f6\u95f4 <\/td>\n<td> \u8fc7\u957f\u53ef\u80fd\u5bfc\u81f4\u8d44\u6e90\u6d6a\u8d39&#xff0c;\u8fc7\u77ed\u53ef\u80fd\u4f1a\u5f15\u8d77\u9891\u7e41\u7684\u7ebf\u7a0b\u521b\u5efa <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p> \u63a5\u4e0b\u6765&#xff0c;\u6211\u4eec\u5c06\u901a\u8fc7\u4e00\u6bb5\u4ee3\u7801\u6765\u5c55\u793a\u5982\u4f55\u5728C#\u4e2d\u521b\u5efa\u548c\u914d\u7f6e\u4e00\u4e2a\u7ebf\u7a0b\u6c60&#xff0c;\u5e76\u5206\u6790\u5176\u6267\u884c\u903b\u8f91\u548c\u53c2\u6570\u8bbe\u7f6e&#xff1a; <\/p>\n<p>using System;<br \/>\nusing System.Threading;<br \/>\nusing System.Threading.Tasks;<\/p>\n<p>public class ThreadPoolExample<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        \/\/ \u521b\u5efa\u5e76\u914d\u7f6e\u7ebf\u7a0b\u6c60<br \/>\n        ThreadPool.GetAvailableThreads(out int workerThreads, out int completionPortThreads);<br \/>\n        Console.WriteLine($&#034;Available worker threads: {workerThreads}, Available completion port threads: {completionPortThreads}&#034;);<\/p>\n<p>        \/\/ \u4f7f\u7528\u7ebf\u7a0b\u6c60\u6267\u884c\u4efb\u52a1<br \/>\n        Parallel.For(0, 10, new ParallelOptions { MaxDegreeOfParallelism &#061; 4 }, i &#061;&gt;<br \/>\n        {<br \/>\n            \/\/ \u6a21\u62dfI\/O\u5bc6\u96c6\u578b\u4efb\u52a1<br \/>\n            Thread.Sleep(1000); \/\/ \u6a21\u62df\u8017\u65f6\u64cd\u4f5c<br \/>\n            Console.WriteLine($&#034;Task {i} is completed on thread: {Thread.CurrentThread.ManagedThreadId}&#034;);<br \/>\n        });<\/p>\n<p>        \/\/ \u8bbe\u7f6e\u7ebf\u7a0b\u6c60\u53c2\u6570<br \/>\n        ThreadPool.SetMinThreads(10, 10); \/\/ \u8bbe\u7f6e\u6700\u5c0f\u7ebf\u7a0b\u6570<\/p>\n<p>        \/\/ \u76d1\u63a7\u7ebf\u7a0b\u6c60\u72b6\u6001<br \/>\n        ThreadPool.GetAvailableThreads(out workerThreads, out completionPortThreads);<br \/>\n        Console.WriteLine($&#034;New available worker threads: {workerThreads}, New available completion port threads: {completionPortThreads}&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p> \u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d&#xff0c;\u6211\u4eec\u9996\u5148\u83b7\u53d6\u4e86\u5f53\u524d\u53ef\u7528\u7684\u5de5\u4f5c\u7ebf\u7a0b\u548cI\/O\u5b8c\u6210\u7aef\u53e3\u7ebf\u7a0b\u6570\u91cf&#xff0c;\u7136\u540e\u4f7f\u7528  Parallel.For  \u6765\u6a21\u62df\u6267\u884c\u4e00\u7cfb\u5217\u7684\u4efb\u52a1\u3002\u6211\u4eec\u8bbe\u7f6e\u4e86  MaxDegreeOfParallelism  \u4e3a4&#xff0c;\u4ee5\u9650\u5236\u540c\u65f6\u8fd0\u884c\u7684\u4efb\u52a1\u6570\u91cf&#xff0c;\u8fd9\u6837\u53ef\u4ee5\u89c2\u5bdf\u7ebf\u7a0b\u6c60\u662f\u5982\u4f55\u8c03\u5ea6\u5de5\u4f5c\u7684\u3002 <\/p>\n<p> \u6211\u4eec\u8fd8\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528  SetMinThreads  \u65b9\u6cd5\u6765\u52a8\u6001\u8c03\u6574\u7ebf\u7a0b\u6c60\u7684\u6700\u5c0f\u7ebf\u7a0b\u6570&#xff0c;\u4ee5\u53ca\u5982\u4f55\u518d\u6b21\u4f7f\u7528  GetAvailableThreads  \u6765\u83b7\u53d6\u5e76\u8f93\u51fa\u8c03\u6574\u540e\u7ebf\u7a0b\u6c60\u7684\u72b6\u6001\u3002 <\/p>\n<p> \u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f&#xff0c;\u5f00\u53d1\u8005\u80fd\u591f\u8c03\u6574\u7ebf\u7a0b\u6c60\u7684\u53c2\u6570&#xff0c;\u89c2\u5bdf\u4efb\u52a1\u6267\u884c\u7684\u60c5\u51b5&#xff0c;\u5e76\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u505a\u51fa\u76f8\u5e94\u7684\u8c03\u6574\u3002 <\/p>\n<p> \u5728\u5b9e\u9645\u5e94\u7528\u4e2d&#xff0c;\u76d1\u63a7\u548c\u6545\u969c\u8bca\u65ad\u662f\u6301\u7eed\u7684\u8fc7\u7a0b\u3002\u53ef\u4ee5\u4f7f\u7528\u4e13\u4e1a\u7684\u6027\u80fd\u76d1\u63a7\u5de5\u5177&#xff08;\u5982AppDynamics\u3001New Relic\u7b49&#xff09;\u6765\u6301\u7eed\u8ddf\u8e2a\u7ebf\u7a0b\u6c60\u7684\u72b6\u6001&#xff0c;\u4ee5\u53ca\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7684\u5065\u5eb7\u72b6\u51b5\u3002 <\/p>\n<p> \u5728\u5206\u6790\u548c\u7406\u89e3\u4e86\u7ebf\u7a0b\u6c60\u5728\u4e0d\u540c\u7c7b\u578b\u4efb\u52a1\u4e2d\u7684\u5e94\u7528\u548c\u53c2\u6570\u8c03\u4f18\u7b56\u7565\u540e&#xff0c;\u6211\u4eec\u80fd\u591f\u66f4\u597d\u5730\u5229\u7528\u7ebf\u7a0b\u6c60\u6765\u63d0\u5347\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002 <\/p>\n<h2> 5. \u591a\u7ebf\u7a0b\u7f16\u7a0b\u548c\u5f02\u6b65I\/O\u64cd\u4f5c <\/h2>\n<h3> 5.1 \u591a\u7ebf\u7a0b\u7f16\u7a0b\u7684\u57fa\u672c\u539f\u7406 <\/h3>\n<h4> 5.1.1 \u7ebf\u7a0b\u7684\u751f\u547d\u5468\u671f\u548c\u72b6\u6001 <\/h4>\n<p> \u591a\u7ebf\u7a0b\u7f16\u7a0b\u6d89\u53ca\u7684\u6700\u6838\u5fc3\u6982\u5ff5\u4e4b\u4e00\u662f\u7ebf\u7a0b\u7684\u751f\u547d\u5468\u671f\u53ca\u5176\u72b6\u6001\u3002\u5728Windows\u5e73\u53f0\u4e0a&#xff0c;\u7ebf\u7a0b\u7684\u72b6\u6001\u8f6c\u6362\u5982\u4e0b\u56fe\u6240\u793a&#xff1a; <\/p>\n<p>graph LR<br \/>\n    A[\u521b\u5efa\u7ebf\u7a0b] &#8211;&gt; B[\u5c31\u7eea\u72b6\u6001]<br \/>\n    B &#8211;&gt; C{\u8c03\u5ea6\u5668}<br \/>\n    C &#8211;&gt;|\u8c03\u5ea6| D[\u8fd0\u884c\u72b6\u6001]<br \/>\n    C &#8211;&gt;|\u672a\u8c03\u5ea6| E[\u5c31\u7eea\u72b6\u6001]<br \/>\n    D &#8211;&gt; F{\u8c03\u5ea6\u5668}<br \/>\n    F &#8211;&gt;|\u65f6\u95f4\u7247\u7528\u5c3d| E<br \/>\n    F &#8211;&gt;|\u963b\u585e| G[\u963b\u585e\u72b6\u6001]<br \/>\n    G &#8211;&gt;|\u963b\u585e\u89e3\u9664| B<br \/>\n    F &#8211;&gt;|\u7ec8\u6b62| H[\u7ec8\u6b62\u72b6\u6001]<\/p>\n<p> \u7ebf\u7a0b\u521b\u5efa\u540e&#xff0c;\u5b83\u5c06\u8fdb\u5165\u5c31\u7eea\u72b6\u6001&#xff0c;\u7b49\u5f85CPU\u8c03\u5ea6\u5668\u9009\u62e9\u6267\u884c\u3002\u4e00\u65e6\u83b7\u5f97\u65f6\u95f4\u7247&#xff0c;\u5b83\u5c06\u8fdb\u5165\u8fd0\u884c\u72b6\u6001&#xff0c;\u6267\u884c\u4ee3\u7801\u3002\u5982\u679c\u9047\u5230I\/O\u64cd\u4f5c\u6216\u5176\u4ed6\u963b\u585e\u8c03\u7528&#xff0c;\u5b83\u4f1a\u8f6c\u5165\u963b\u585e\u72b6\u6001&#xff0c;\u76f4\u5230\u963b\u585e\u4e8b\u4ef6\u53d1\u751f\u3002\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u6216\u8005\u88ab\u7ec8\u6b62\u65f6&#xff0c;\u8fdb\u5165\u7ec8\u6b62\u72b6\u6001\u3002 <\/p>\n<h4> 5.1.2 \u7ebf\u7a0b\u540c\u6b65\u673a\u5236 <\/h4>\n<p> \u5728\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d&#xff0c;\u7ebf\u7a0b\u540c\u6b65\u673a\u5236\u662f\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\u3001\u907f\u514d\u7ade\u6001\u6761\u4ef6\u7684\u5173\u952e\u6280\u672f\u3002\u5e38\u89c1\u7684\u540c\u6b65\u673a\u5236\u5305\u62ec\u4e92\u65a5\u9501&#xff08;Mutex&#xff09;\u3001\u4fe1\u53f7\u91cf&#xff08;Semaphore&#xff09;\u3001\u4e8b\u4ef6&#xff08;Event&#xff09;\u548c\u4e34\u754c\u533a&#xff08;Critical Section&#xff09;\u3002\u4e92\u65a5\u9501\u662f\u4fdd\u62a4\u8d44\u6e90\u7684\u6700\u5e38\u89c1\u65b9\u5f0f&#xff0c;\u786e\u4fdd\u540c\u4e00\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee\u7279\u5b9a\u8d44\u6e90\u3002\u4fe1\u53f7\u91cf\u63d0\u4f9b\u4e86\u4e00\u79cd\u9650\u5236\u5bf9\u8d44\u6e90\u8bbf\u95ee\u6570\u91cf\u7684\u65b9\u6cd5\u3002\u4e8b\u4ef6\u7528\u4e8e\u7ebf\u7a0b\u95f4\u7684\u901a\u4fe1\u3002\u4e34\u754c\u533a\u662f\u6027\u80fd\u6700\u9ad8\u7684\u540c\u6b65\u65b9\u5f0f&#xff0c;\u9002\u7528\u4e8e\u5355\u4e00\u8fdb\u7a0b\u7684\u7ebf\u7a0b\u540c\u6b65\u3002 <\/p>\n<h3> 5.2 \u5f02\u6b65I\/O\u64cd\u4f5c\u7684\u91cd\u8981\u6027 <\/h3>\n<h4> 5.2.1 \u540c\u6b65I\/O\u4e0e\u5f02\u6b65I\/O\u7684\u533a\u522b <\/h4>\n<p> \u540c\u6b65I\/O\u4e0e\u5f02\u6b65I\/O\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u8c03\u7528I\/O\u64cd\u4f5c\u65f6\u7ebf\u7a0b\u7684\u963b\u585e\u884c\u4e3a\u3002\u540c\u6b65I\/O\u5728\u6267\u884cI\/O\u64cd\u4f5c\u65f6&#xff0c;\u7ebf\u7a0b\u4f1a\u963b\u585e&#xff0c;\u76f4\u5230\u64cd\u4f5c\u5b8c\u6210\u3002\u800c\u5f02\u6b65I\/O\u5141\u8bb8\u7ebf\u7a0b\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1&#xff0c;\u5f53I\/O\u64cd\u4f5c\u5b8c\u6210\u540e&#xff0c;\u901a\u8fc7\u56de\u8c03\u6216\u5176\u4ed6\u901a\u77e5\u673a\u5236\u544a\u77e5\u7ebf\u7a0b\u3002\u5f02\u6b65I\/O\u7684\u4f18\u52bf\u5728\u4e8e\u63d0\u9ad8\u4e86\u7a0b\u5e8f\u7684\u5e76\u53d1\u6027&#xff0c;\u5e76\u4e14\u80fd\u591f\u66f4\u597d\u5730\u5229\u7528\u7cfb\u7edf\u8d44\u6e90\u3002 <\/p>\n<h4> 5.2.2 \u5f02\u6b65I\/O\u5728\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u4e2d\u7684\u5e94\u7528\u5b9e\u4f8b <\/h4>\n<p> \u5728\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u5f00\u53d1\u4e2d&#xff0c;\u5f02\u6b65I\/O\u64cd\u4f5c\u662f\u63d0\u5347\u6027\u80fd\u7684\u5173\u952e\u3002\u4f8b\u5982&#xff0c;\u5728\u5904\u7406\u5927\u91cf\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u65f6&#xff0c;\u670d\u52a1\u5668\u53ef\u4ee5\u53d1\u8d77\u5f02\u6b65\u8bfb\u5199\u64cd\u4f5c&#xff0c;\u800c\u4e0d\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002\u4e3b\u7ebf\u7a0b\u53ef\u4ee5\u7ee7\u7eed\u5904\u7406\u65b0\u7684\u8fde\u63a5\u8bf7\u6c42\u6216\u5176\u4ed6\u4efb\u52a1&#xff0c;\u7b49\u5230\u5f02\u6b65\u64cd\u4f5c\u5b8c\u6210\u540e\u518d\u8fdb\u884c\u6570\u636e\u5904\u7406\u3002 <\/p>\n<p> \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528IOCP\u8fdb\u884c\u5f02\u6b65I\/O\u64cd\u4f5c\u7684\u4f2a\u4ee3\u7801\u793a\u4f8b&#xff1a; <\/p>\n<p>OVERLAPPED overlapped;<br \/>\nDWORD bytes_transferred;<br \/>\nBOOL result;<\/p>\n<p>\/\/ \u521d\u59cb\u5316OVERLAPPED\u7ed3\u6784\u4f53<br \/>\nZeroMemory(&amp;overlapped, sizeof(OVERLAPPED));<\/p>\n<p>\/\/ \u5411IOCP\u63d0\u4ea4\u5f02\u6b65\u8bfb\u8bf7\u6c42<br \/>\nresult &#061; ReadFile(hFile, buffer, buffer_size, NULL, &amp;overlapped);<br \/>\nif (!result &amp;&amp; GetLastError() !&#061; ERROR_IO_PENDING) {<br \/>\n    \/\/ \u8bfb\u53d6\u5931\u8d25\u5904\u7406\u903b\u8f91<br \/>\n}<\/p>\n<p>\/\/ \u4e3b\u5faa\u73af<br \/>\nwhile (true) {<br \/>\n    \/\/ \u7b49\u5f85I\/O\u5b8c\u6210\u4e8b\u4ef6<br \/>\n    result &#061; GetQueuedCompletionStatus(hIOCP, &amp;bytes_transferred, &amp;completion_key,<br \/>\n                                       (OVERLAPPED**)&amp;overlapped, INFINITE);<br \/>\n    if (result) {<br \/>\n        \/\/ I\/O\u64cd\u4f5c\u6210\u529f\u5b8c\u6210&#xff0c;\u5904\u7406\u6570\u636e<br \/>\n    } else {<br \/>\n        \/\/ I\/O\u64cd\u4f5c\u5931\u8d25\u5904\u7406\u903b\u8f91<br \/>\n    }<br \/>\n}<\/p>\n<h3> 5.3 Windows Socket API\u7684\u9ad8\u7ea7\u4f7f\u7528 <\/h3>\n<h4> 5.3.1 WSARecv\u548cWSASend\u7684\u6df1\u5165\u7406\u89e3 <\/h4>\n<p> WSARecv\u548cWSASend\u662fWindows\u63d0\u4f9b\u7684\u7528\u4e8e\u5f02\u6b65I\/O\u7684socket API\u51fd\u6570\u3002\u5b83\u4eec\u5141\u8bb8\u5f00\u53d1\u8005\u6267\u884c\u975e\u963b\u585e\u7684\u7f51\u7edc\u8bfb\u5199\u64cd\u4f5c\u3002\u8fd9\u4e9bAPI\u51fd\u6570\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u5f0f\u6765\u5904\u7406\u5927\u91cf\u7684\u5e76\u53d1I\/O\u8bf7\u6c42&#xff0c;\u800c\u4e0d\u4f1a\u9020\u6210\u7ebf\u7a0b\u963b\u585e\u6216\u8d44\u6e90\u6d6a\u8d39\u3002 <\/p>\n<h4> 5.3.2 \u9ad8\u7ea7\u7f51\u7edc\u7f16\u7a0b\u6280\u5de7\u548c\u5b9e\u8df5\u6848\u4f8b <\/h4>\n<p> \u5728\u9ad8\u7ea7\u7f51\u7edc\u7f16\u7a0b\u4e2d&#xff0c;\u5f00\u53d1\u8005\u7ecf\u5e38\u9700\u8981\u5904\u7406TCP\/IP\u534f\u8bae\u6808\u7684\u5404\u79cd\u590d\u6742\u60c5\u51b5\u3002\u4f8b\u5982&#xff0c;\u5b9e\u73b0\u4e00\u4e2a\u5177\u6709\u9ad8\u6027\u80fd\u7684TCP\u670d\u52a1\u5668&#xff0c;\u9700\u8981\u5408\u7406\u5730\u7ba1\u7406\u8fde\u63a5\u3001\u8bfb\u53d6\u7f13\u51b2\u533a\u3001\u5904\u7406\u5f02\u5e38\u548c\u4f18\u5316\u6570\u636e\u5305\u7684\u53d1\u9001\u4e0e\u63a5\u6536\u3002\u4f7f\u7528\u5f02\u6b65I\/O\u64cd\u4f5c\u65f6&#xff0c;\u5f00\u53d1\u8005\u53ef\u4ee5\u5229\u7528IOCP\u6765\u7ba1\u7406\u5927\u91cf\u7684\u5e76\u53d1\u8fde\u63a5\u548c\u6570\u636e\u4f20\u8f93&#xff0c;\u4ece\u800c\u6784\u5efa\u8d77\u4e00\u4e2a\u80fd\u591f\u5904\u7406\u6210\u5343\u4e0a\u4e07\u5e76\u53d1\u8fde\u63a5\u7684\u7a33\u5b9a\u670d\u52a1\u5668\u67b6\u6784\u3002 <\/p>\n<p>\/\/ \u4f7f\u7528WSARecv\u548cWSASend\u7684\u793a\u4f8b<br \/>\nWSABUF data_buf;<br \/>\nSOCKET client_socket;<br \/>\nDWORD 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\u7b80\u4ecb&#xff1a;\u5728\u5f00\u53d1\u9ad8\u6027\u80fd\u3001\u9ad8\u5e76\u53d1\u7684\u5927\u578b\u670d\u52a1\u5668\u65f6&#xff0c;IO\u5b8c\u6210\u7aef\u53e3(IOCP)\u548c\u7ebf\u7a0b\u6c60\u662f\u6838\u5fc3\u7ec4\u4ef6\u3002\u672c\u538b\u7f29\u5305\u63d0\u4f9b\u4e86 CompletionIoServer.cpp\u3001CompletionIoClient.cpp\u3001CompletionIoServer.h \u548c CompletionIoClient.h 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