{"id":6514,"date":"2024-07-10T08:04:21","date_gmt":"2024-07-10T08:04:21","guid":{"rendered":"https:\/\/bitcuz.com\/%e6%9c%aa%e5%88%86%e7%b1%bb\/%e5%88%a9%e7%94%a8%e5%8f%8d%e5%ba%94%e5%a0%86%e6%a8%a1%e5%9e%8b%e5%92%8c-epoll-%e5%ae%9e%e7%8e%b0%e9%ab%98%e6%80%a7%e8%83%bd%e5%b9%b6%e5%8f%91-i-o\/"},"modified":"2024-07-11T02:56:45","modified_gmt":"2024-07-11T02:56:45","slug":"harnessing-high-performance-concurrent-i-o-with-reactor-model-and-epoll","status":"publish","type":"post","link":"https:\/\/bitcuz.com\/zh-hans\/technology\/harnessing-high-performance-concurrent-i-o-with-reactor-model-and-epoll\/","title":{"rendered":"\u5229\u7528\u53cd\u5e94\u5668\u6a21\u578b\u548c epoll \u5b9e\u73b0\u9ad8\u6027\u80fd\u5e76\u53d1 I\/O"},"content":{"rendered":"\n<p>\u5728\u8ba1\u7b97\u673a\u8f6f\u4ef6\u7cfb\u7edf\u5f00\u53d1\u9886\u57df\uff0c\u9ad8\u6548\u5904\u7406\u5e76\u53d1 I\/O \u662f\u4e00\u4e2a\u6c38\u6052\u7684\u8bdd\u9898\u3002 \u6211\u66fe\u7ecf\u5728\u4e00\u4e2a\u9879\u76ee\u4e2d\u9047\u5230\u8fc7\u8fd9\u6837\u4e00\u4e2a\u6311\u6218\uff1a\u6211\u9700\u8981\u8bbe\u8ba1\u4e00\u4e2a\u80fd\u591f\u540c\u65f6\u5904\u7406\u6570\u5343\u4e2a\u7f51\u7edc\u8fde\u63a5\u7684\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u3002 \u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u6211\u6df1\u5165\u7814\u7a76\u4e86 Reactor \u6a21\u578b\u548c epoll \u7684\u5e94\u7528\u3002 \u8fd9\u4e9b\u6280\u672f\u6700\u7ec8\u5e2e\u52a9\u6211\u89e3\u51b3\u4e86\u95ee\u9898\u3002 \u4eca\u5929\uff0c\u6211\u60f3\u4e0e\u5927\u5bb6\u5206\u4eab\u6211\u5728\u8fd9\u65b9\u9762\u7684\u63a2\u7d22\u548c\u7ecf\u9a8c\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u53d1\u73b0\u53cd\u5e94\u5668\u6a21\u578b<\/h4>\n\n\n\n<p>\u4e00\u4e2a\u4e0b\u5348\uff0c\u6211\u53d1\u73b0\u5f53\u5e76\u53d1\u8fde\u63a5\u6570\u8f83\u591a\u65f6\uff0c\u670d\u52a1\u5668\u7684\u6027\u80fd\u660e\u663e\u4e0b\u964d\u3002 \u9009\u62e9\u548c\u6295\u7968\u7b49\u4f20\u7edf\u65b9\u6cd5\u663e\u7136\u662f\u4e0d\u591f\u7684\u3002 \u4e8e\u662f\uff0c\u6211\u5f00\u59cb\u7814\u7a76\u53cd\u5e94\u5668\u6a21\u578b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2-1024x576.png\" alt=\"system-epoll-2\" class=\"wp-image-6332\" srcset=\"https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2-1024x576.png 1024w, https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2-300x169.png 300w, https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2-768x432.png 768w, https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2-150x84.png 150w, https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2-450x253.png 450w, https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2-1200x675.png 1200w, https:\/\/bitcuz.com\/wp-content\/uploads\/2024\/07\/system-epoll2.png 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Reactor \u6a21\u578b\u662f\u4e00\u79cd\u7528\u4e8e\u5904\u7406\u5e76\u53d1 I\/O \u64cd\u4f5c\u7684\u8bbe\u8ba1\u6a21\u5f0f\u3002 \u5176\u6838\u5fc3\u601d\u60f3\u662f\u901a\u8fc7\u4e8b\u4ef6\u9a71\u52a8\u673a\u5236\u5c06 I\/O \u64cd\u4f5c\u4e0e\u4e1a\u52a1\u903b\u8f91\u5206\u5f00\u3002 \u8be5\u6a21\u578b\u7531\u4e09\u4e2a\u4e3b\u8981\u90e8\u5206\u7ec4\u6210\uff1a\u591a\u8def\u590d\u7528\u5668\u3001\u4e8b\u4ef6\u6d3e\u53d1\u5668\u548c\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u3002<\/p>\n\n\n\n<ol>\n<li><strong>\u591a\u8def\u590d\u7528\u5668<\/strong>\uff1a\u76d1\u63a7\u591a\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u68c0\u6d4b\u54ea\u4e9b\u63cf\u8ff0\u7b26\u6709\u4e8b\u4ef6\u3002 \u5728 Linux \u4e2d\uff0c\u591a\u8def\u590d\u7528\u5668\u901a\u5e38\u901a\u8fc7 select\u3001poll \u6216 epoll \u6765\u5b9e\u73b0\u3002<\/li>\n\n\n\n<li><strong>\u4e8b\u4ef6\u6d3e<\/strong>\u53d1\u5668\uff1a\u4ece\u591a\u8def\u590d\u7528\u5668\u63a5\u6536\u4e8b\u4ef6\u540e\uff0c\u5b83\u5c06\u4e8b\u4ef6\u5206\u6d3e\u7ed9\u76f8\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u3002<\/li>\n\n\n\n<li><strong>\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f<\/strong>\uff1a\u8d1f\u8d23\u5904\u7406\u7279\u5b9a\u7684 I\/O \u4e8b\u4ef6\uff0c\u5982\u8bfb\u53d6\u6570\u636e\u548c\u5904\u7406\u8bf7\u6c42\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u5728 Reactor \u6a21\u578b\u4e2d\uff0c\u6240\u6709 I\/O \u64cd\u4f5c\u90fd\u662f\u5f02\u6b65\u7684\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ea\u6709\u5728\u4e8b\u4ef6\u53d1\u751f\u65f6\u624d\u4f1a\u6536\u5230\u5904\u7406\u4e8b\u4ef6\u7684\u901a\u77e5\u3002 \u8fd9\u5927\u5927\u589e\u5f3a\u4e86\u7cfb\u7edf\u5904\u7406\u5e76\u53d1\u64cd\u4f5c\u7684\u80fd\u529b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5e94\u7528 epoll<\/h4>\n\n\n\n<p>\u5728\u4e86\u89e3\u4e86 Reactor \u6a21\u578b\u7684\u57fa\u672c\u6982\u5ff5\u540e\uff0c\u6211\u8fdb\u4e00\u6b65\u63a2\u7d22\u4e86 epoll\u3002 epoll \u662f Linux \u5185\u6838\u63d0\u4f9b\u7684\u4e00\u79cd\u9ad8\u6027\u80fd I\/O \u591a\u8def\u590d\u7528\u673a\u5236\uff0c\u4e13\u95e8\u7528\u4e8e\u5904\u7406\u5927\u89c4\u6a21\u5e76\u53d1\u8fde\u63a5\u3002<\/p>\n\n\n\n<p>epoll \u7684\u4f18\u52bf\u5728\u4e8e\u5176\u4e8b\u4ef6\u9a71\u52a8\u673a\u5236\u548c\u9ad8\u6548\u7684\u4e8b\u4ef6\u901a\u77e5\u529f\u80fd\u3002 \u4e0e select \u548c poll \u76f8\u6bd4\uff0cepoll \u5728\u6027\u80fd\u548c\u53ef\u6269\u5c55\u6027\u65b9\u9762\u90fd\u6709\u663e\u8457\u63d0\u9ad8\uff0c\u5c24\u5176\u662f\u5728\u5904\u7406\u5927\u91cf\u6587\u4ef6\u63cf\u8ff0\u7b26\u65f6\u3002 \u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528\u8fd9\u9879\u6280\u672f\uff0c\u6211\u7f16\u5199\u4e86\u4e00\u4e2a\u7b80\u5355\u7684 epoll \u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"c\" class=\"language-c line-numbers\"><code>#include &lt;sys\/epoll.h&gt;\n#include &lt;fcntl.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;stdio.h&gt;\n\n#define MAX_EVENTS 10\n\nint main() {\n    int epoll_fd = epoll_create1(0);\n    if (epoll_fd == -1) {\n        perror(\"epoll_create1\");\n        return 1;\n    }\n\n    int listen_fd = open(\"somefile\", O_RDONLY);\n    if (listen_fd == -1) {\n        perror(\"open\");\n        return 1;\n    }\n\n    struct epoll_event event;\n    event.events = EPOLLIN;\n    event.data.fd = listen_fd;\n\n    if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, listen_fd, &amp;event) == -1) {\n        perror(\"epoll_ctl\");\n        return 1;\n    }\n\n    struct epoll_event events[MAX_EVENTS];\n    int n;\n\n    while (1) {\n        n = epoll_wait(epoll_fd, events, MAX_EVENTS, -1);\n        for (int i = 0; i &lt; n; i++) {\n            if (events[i].events &amp; EPOLLIN) {\n                \/\/ Handle readable events\n                char buffer[128];\n                read(events[i].data.fd, buffer, sizeof(buffer));\n                printf(\"Read data: %s\\n\", buffer);\n            }\n        }\n    }\n\n    close(listen_fd);\n    close(epoll_fd);\n    return 0;\n}\n<\/code><\/code><\/pre>\n\n\n\n<p>\u8be5\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u521b\u5efa\u4e00\u4e2a epoll \u5b9e\u4f8b\u3001\u5411\u5176\u6dfb\u52a0\u6587\u4ef6\u63cf\u8ff0\u7b26\u4ee5\u53ca\u5728\u4e8b\u4ef6\u53d1\u751f\u65f6\u5904\u7406\u4e8b\u4ef6\u3002 \u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\uff0c\u6211\u80fd\u591f\u6709\u6548\u5730\u7ba1\u7406\u670d\u52a1\u5668\u4e0a\u7684\u5e76\u53d1\u8fde\u63a5\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6765\u81ea\u5b9e\u8df5\u7684\u601d\u8003\u548c\u7ed3\u8bba<\/h4>\n\n\n\n<p>\u901a\u8fc7\u8fd9\u6b21\u63a2\u7d22\uff0c\u6211\u4e0d\u4ec5\u89e3\u51b3\u4e86\u670d\u52a1\u5668\u6027\u80fd\u95ee\u9898\uff0c\u8fd8\u52a0\u6df1\u4e86\u5bf9 Reactor \u6a21\u578b\u548c epoll \u7684\u7406\u89e3\u3002 \u663e\u7136\uff0c\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u7684\u79d8\u5bc6\u5728\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u548c\u5f02\u6b65 I\/O\u3002 \u8fd9\u4e00\u8ba4\u8bc6\u51f8\u663e\u4e86\u6280\u672f\u8fdb\u6b65\u5bf9\u6548\u7387\u7684\u4e0d\u61c8\u8ffd\u6c42\u3002<\/p>\n\n\n\n<p>Reactor \u6a21\u578b\u4e0e epoll \u7684\u7ed3\u5408\u4e3a\u5904\u7406\u9ad8\u5e76\u53d1 I\/O \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177\u3002 \u8fd9\u4e9b\u6280\u672f\u4e0d\u4ec5\u9002\u7528\u4e8e\u670d\u52a1\u5668\u5f00\u53d1\uff0c\u8fd8\u5e7f\u6cdb\u5e94\u7528\u4e8e\u9700\u8981\u9ad8\u6548 I\/O \u5904\u7406\u7684\u5404\u79cd\u573a\u666f\u3002 \u6211\u5e0c\u671b\u8fd9\u7bc7\u6587\u7ae0\u80fd\u5e2e\u52a9\u66f4\u591a\u5f00\u53d1\u4eba\u5458\u4e86\u89e3\u548c\u5e94\u7528\u8fd9\u4e9b\u6280\u672f\uff0c\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n\n\n\n<p>\u65e0\u8bba\u60a8\u662f\u65b0\u624b\u8fd8\u662f\u7ecf\u9a8c\u4e30\u5bcc\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u5728\u9762\u4e34\u5e76\u53d1 I\/O \u5904\u7406\u7684\u6311\u6218\u65f6\uff0c\u90fd\u53ef\u4ee5\u8003\u8651\u5c1d\u8bd5 Reactor \u6a21\u578b\u548c epoll\u3002 \u4f60\u53ef\u80fd\u4f1a\u53d1\u73b0\u4e00\u4e2a\u5168\u65b0\u7684\u4e16\u754c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u8ba1\u7b97\u673a\u8f6f\u4ef6\u7cfb\u7edf\u5f00\u53d1\u9886\u57df\uff0c\u9ad8\u6548\u5904\u7406\u5e76\u53d1 I\/O \u662f\u4e00\u4e2a\u6c38\u6052\u7684\u8bdd\u9898\u3002 \u6211\u66fe\u7ecf\u5728\u4e00\u4e2a\u9879\u76ee\u4e2d\u9047\u5230\u8fc7\u8fd9\u6837\u4e00\u4e2a\u6311\u6218\uff1a\u6211\u9700<\/p>\n","protected":false},"author":9,"featured_media":6327,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","footnotes":""},"categories":[203,359,211],"tags":[],"_links":{"self":[{"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/posts\/6514"}],"collection":[{"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=6514"}],"version-history":[{"count":2,"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/posts\/6514\/revisions"}],"predecessor-version":[{"id":6517,"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/posts\/6514\/revisions\/6517"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/media\/6327"}],"wp:attachment":[{"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=6514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=6514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bitcuz.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=6514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}