{"id":31660,"date":"2025-04-22T03:16:13","date_gmt":"2025-04-21T19:16:13","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/31660.html"},"modified":"2025-04-22T03:16:13","modified_gmt":"2025-04-21T19:16:13","slug":"linux%e9%ab%98%e6%80%a7%e8%83%bd%e5%bc%82%e6%ad%a5io%ef%bc%8cio_uring%e5%ae%9e%e7%8e%b0%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/31660.html","title":{"rendered":"Linux\u9ad8\u6027\u80fd\u5f02\u6b65io\uff0cio_uring\u5b9e\u73b0\u670d\u52a1\u5668"},"content":{"rendered":"<p>Linux\u7cfb\u7edf\u4e2dio_uring\u662f2019\u5e74\u9996\u6b21\u51fa\u73b0\u7684\u4e00\u4e2a\u65b0\u7684\u5f02\u6b65IO\u6846\u67b6&#xff0c;\u7528\u4e8e\u5b9e\u73b0\u9ad8\u6548\u7684\u5f02\u6b65IO\u64cd\u4f5c\u3002<\/p>\n<h5>1. io_uring\u4e3a\u4ec0\u4e48\u9ad8\u6548<\/h5>\n<ul>\n<li>\u76f8\u8f83\u4e8e\u5e38\u7528\u7684\u540c\u6b65io&#xff0c;read\/write\/accpet\u7b49&#xff0c;io_uring\u4f7f\u7528\u4e24\u4e2a\u961f\u5217\u6765\u5b9e\u73b0io\u64cd\u4f5c&#xff0c;\u4e00\u4e2a\u662f\u63d0\u4ea4\u961f\u5217Submission Queue&#xff08;SQ&#xff09;&#xff0c;\u53e6\u4e00\u4e2a\u662f\u5b8c\u6210\u961f\u5217Completion Queue&#xff08;CQ&#xff09;&#xff0c;SQ\u5b58\u653e\u7528\u6237\u63d0\u4ea4\u7684io\u8bf7\u6c42&#xff0c;CQ\u5b58\u653e\u5185\u6838io\u8bf7\u6c42\u5b8c\u6210\u540e\u7684\u7ed3\u679c&#xff0c;\u53d1\u8d77\u8bf7\u6c42\u540e\u4e0d\u9700\u8981\u963b\u585e\u7b49\u5f85io\u64cd\u4f5c\u7684\u7ed3\u679c&#xff0c;\u5b9e\u73b0\u771f\u6b63\u7684\u5f02\u6b65\u3002<\/li>\n<li>\u4f7f\u7528\u4e24\u4e2a\u961f\u5217\u4f1a\u5e26\u6765\u4e24\u4e2a\u95ee\u9898&#xff0c;\u4e00\u4e2a\u662f\u4efb\u52a1\u7528\u6237\u7a7a\u95f4\u548c\u4e24\u4e2a\u961f\u5217\u4e4b\u95f4\u4efb\u52a1\u7684\u9891\u7e41\u62f7\u8d1d\u5e26\u6765\u7684\u6027\u80fd\u635f\u8017&#xff0c;\u53e6\u4e00\u4e2a\u662f\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u3002\n<ul>\n<li>\u6027\u80fd\u95ee\u9898&#xff1a;io_uring\u521b\u5efa\u65f6\u4f1a\u4f7f\u7528mmap\u505a\u5185\u5b58\u6620\u5c04&#xff0c;\u7528\u6237\u7a7a\u95f4\u548c\u5185\u6838\u7a7a\u95f4\u5171\u4eab\u4e00\u5757\u5185\u5b58&#xff1b;<\/li>\n<li>\u7ebf\u7a0b\u5b89\u5168&#xff1a;io_uring\u4f7f\u7528\u73af\u5f62\u961f\u5217&#xff0c;\u5e76\u4e14\u961f\u5217\u90fd\u4f7f\u7528\u539f\u5b50\u578b\u7684\u5934\u5c3e\u6307\u9488\u6765\u7ba1\u7406\u961f\u5217\u4e2d\u7684\u6761\u76ee&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>io_uring \u652f\u6301\u6279\u91cf\u63d0\u4ea4 I\/O \u8bf7\u6c42\u548c\u6279\u91cf\u83b7\u53d6\u5b8c\u6210\u7ed3\u679c&#xff0c;\u8fd9\u51cf\u5c11\u4e86\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u7cfb\u7edf\u8c03\u7528\u7684\u5f00\u9500&#xff0c;\u63d0\u9ad8\u4e86\u6548\u7387\u3002<\/li>\n<\/ul>\n<h5>2. io_uring\u5982\u4f55\u4f7f\u7528<\/h5>\n<ul>\n<li>\n<p>Linux\u5185\u6838\u7248\u672c\u9700\u8981\u5927\u4e8e5.4&#xff0c;\u4ee5\u66f4\u597d\u5730\u652f\u6301io_uring<\/p>\n<\/li>\n<li>\n<p>io_uring\u7684\u4e09\u4e2a\u7cfb\u7edf\u8c03\u7528<\/p>\n<p> <span class=\"token keyword\">int<\/span> <span class=\"token function\">io_uring_setup<\/span><span class=\"token punctuation\">(<\/span>u32 entries<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_params<\/span> <span class=\"token operator\">*<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u521d\u59cb\u5316\u4e00\u4e2a io_uring \u5b9e\u4f8b\u3002\u5b83\u5728\u5185\u6838\u4e2d\u521b\u5efa\u548c\u914d\u7f6e io_uring \u6570\u636e\u7ed3\u6784&#xff0c;\u5e76\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u7528\u4e8e\u4e0e\u8be5\u5b9e\u4f8b\u8fdb\u884c\u4ea4\u4e92\u3002<\/li>\n<\/ul>\n<p> <span class=\"token keyword\">int<\/span> <span class=\"token function\">io_uring_register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> opcode<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>arg<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> nr_args<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u7528\u4e8e\u5411 io_uring \u5b9e\u4f8b\u6ce8\u518c\u5404\u79cd\u8d44\u6e90&#xff0c;\u5982\u6587\u4ef6\u63cf\u8ff0\u7b26\u3001\u7f13\u51b2\u533a\u3001\u4e8b\u4ef6\u6587\u4ef6\u63cf\u8ff0\u7b26\u7b49\u3002\u8fd9\u4e9b\u6ce8\u518c\u64cd\u4f5c\u53ef\u4ee5\u63d0\u9ad8 I\/O \u64cd\u4f5c\u7684\u6548\u7387&#xff0c;\u56e0\u4e3a\u5b83\u4eec\u5141\u8bb8 io_uring \u5728\u6267\u884c I\/O \u64cd\u4f5c\u65f6\u76f4\u63a5\u8bbf\u95ee\u8fd9\u4e9b\u9884\u5148\u6ce8\u518c\u7684\u8d44\u6e90&#xff0c;\u800c\u4e0d\u9700\u8981\u5728\u6bcf\u6b21\u64cd\u4f5c\u65f6\u91cd\u65b0\u8bbe\u7f6e\u3002<\/li>\n<\/ul>\n<p> <span class=\"token keyword\">int<\/span> <span class=\"token function\">io_uring_enter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> to_submit<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> min_complete<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> flags<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">sigset_t<\/span> <span class=\"token operator\">*<\/span>sig<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u7528\u4e8e\u63d0\u4ea4\u548c\u7b49\u5f85 io_uring \u961f\u5217\u4e2d\u7684 I\/O \u64cd\u4f5c\u3002\u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\u5141\u8bb8\u7528\u6237\u63d0\u4ea4\u65b0\u7684 I\/O \u8bf7\u6c42&#xff0c;\u5e76\u7b49\u5f85\u8fd9\u4e9b\u8bf7\u6c42\u7684\u5b8c\u6210&#xff0c;\u6216\u8005\u4ec5\u63d0\u4ea4\u8bf7\u6c42\u800c\u4e0d\u7b49\u5f85\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u539f\u59cb\u7cfb\u7edf\u8c03\u7528\u6bd4\u8f83\u62bd\u8c61&#xff0c;\u53ef\u4ee5\u501f\u52a9liburing\u6765\u4f7f\u7528\u5f02\u6b65io&#xff0c;\u5728Linux 5.4\u4ee5\u4e0a\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5&#xff0c;\u4f4e\u7248\u672c\u53ef\u80fd\u53ef\u4ee5\u5b89\u88c5&#xff0c;\u4f46\u662f\u4e0d\u80fd\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n<p>git clone https:\/\/github.com\/axboe\/liburing.git cd liburing .\/configure make sudo make install<\/p>\n<\/li>\n<\/ul>\n<h5>3. \u4f7f\u7528liburing\u5e38\u7528API\u6784\u5efa\u5f02\u6b65\u670d\u52a1\u5668<\/h5>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">io_uring_queue_init_params<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> entries<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_params<\/span> <span class=\"token operator\">*<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u521d\u59cb\u5316\u4e00\u4e2aio_uring\u5b9e\u4f8b&#xff0c;\u5e76\u6307\u5b9aSQ\u548cCQ\u4e2d\u7684\u6761\u76ee\u6570&#xff0c;\u4f20\u9012io_uring\u7684\u914d\u7f6e\u53c2\u6570&#xff0c;\u8be5\u51fd\u6570\u4f7f\u7528\u4e86\u7cfb\u7edf\u8c03\u7528io_uring_setup\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_sqe<\/span> <span class=\"token operator\">*<\/span><span class=\"token function\">io_uring_get_sqe<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>\u83b7\u53d6SQ\u4e2d\u7b2c\u4e00\u4e2a\u7a7aio_uring_sqe\u7ed3\u6784\u4f53&#xff0c;\u540e\u7eed\u7528\u6237\u53ef\u4ee5\u586b\u5145io\u8bf7\u6c42\u5e76\u63d0\u4ea4\u7ed9io_uring\u3002<\/li>\n<\/ul>\n<p><span class=\"token function\">io_uring_prep_accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_sqe<\/span> <span class=\"token operator\">*<\/span>sqe<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span>addr<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">socklen_t<\/span> <span class=\"token operator\">*<\/span>addrlen<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> flags<span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>\u51c6\u5907\u4e00\u4e2a accept \u7cfb\u7edf\u8c03\u7528\u7684\u63d0\u4ea4\u961f\u5217\u6761\u76ee&#xff0c;sqe\u662f\u6307\u5411\u8981\u586b\u5145\u7684 io_uring_sqe \u7ed3\u6784\u4f53\u7684\u6307\u9488&#xff0c;\u540e\u7eed\u53c2\u6570\u540caccept4&#xff0c;\u975e\u963b\u585e\u8c03\u7528&#xff0c;\u53ea\u63d0\u4ea4\u8bf7\u6c42&#xff0c;\u4e0d\u7b49\u5f85\u8fd4\u56de\u7ed3\u679c&#xff0c;\u5bf9\u4e8e\u540c\u6b65\u7684send\/recv\u4e5f\u6709\u5bf9\u5e94\u7684io_uring_prep_send\/io_uring_prep_recv&#xff0c;\u5e95\u5c42\u4f7f\u7528io_uring_register\u7cfb\u7edf\u8c03\u7528\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">io_uring_submit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u5c06\u63d0\u4ea4\u961f\u5217\u6761\u76ee&#xff08;io_uring_sqe&#xff09;\u4e00\u6b21\u6027\u63d0\u4ea4\u5230\u5185\u6838\u8fdb\u884c\u5904\u7406\u3002\u8fd9\u4e9b\u8bf7\u6c42\u4f1a\u88ab\u5185\u6838\u8c03\u5ea6\u5e76\u6267\u884c&#xff0c;\u6267\u884c\u5b8c\u6210\u540e&#xff0c;\u7ed3\u679c\u4f1a\u88ab\u653e\u5165CQ\u4e2d&#xff0c;\u5e95\u5c42\u4f7f\u7528io_uring_enter\u7cfb\u7edf\u8c03\u7528\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">io_uring_wait_cqe<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_cqe<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span>cqe_ptr<span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>\u963b\u585e\u7b49\u5f85CQ\u4e2d\u7684\u6761\u76ee&#xff0c;\u7ed3\u679c\u5b58\u5165cqe_ptr\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token function\">io_uring_peek_batch_cqe<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_cqe<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span>cqes<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> count<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u6279\u91cf\u83b7\u53d6CQ\u4e2d\u7684\u6761\u76ee&#xff0c;\u652f\u6301\u4e00\u6b21\u6027\u8fd4\u56de\u591a\u4e2a&#xff0c;\u53ef\u4ee5\u7c7b\u6bd4epoll_wait&#xff0c;\u975e\u963b\u585e\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">io_uring_cq_advance<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> nr<span class=\"token punctuation\">)<\/span><\/p>\n<ul>\n<li>\u901a\u77e5\u5185\u6838\u6709\u591a\u5c11\u4e2aCQ\u4e2d\u7684\u6761\u76ee\u5df2\u7ecf\u88ab\u5904\u7406\u5b8c\u6210&#xff0c;\u53ef\u4ee5\u88abio_ring\u91cd\u7528&#xff0c;\u5728\u6bcf\u6b21\u8c03\u7528io_uring_peek_batch_cqe\u540e&#xff0c;\u5fc5\u987b\u8c03\u7528io_uring_cq_advance\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662f\u5b8c\u6574\u5b9e\u73b0\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;liburing.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;netinet\/in.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">EVENT_ACCEPT<\/span>   <span class=\"token expression\"><span class=\"token number\">0<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">EVENT_READ<\/span><span class=\"token expression\"><span class=\"token number\">1<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">EVENT_WRITE<\/span><span class=\"token expression\"><span class=\"token number\">2<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">ENTRIES_LENGTH<\/span><span class=\"token expression\"><span class=\"token number\">1024<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">BUFFER_LENGTH<\/span><span class=\"token expression\"><span class=\"token number\">1024<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">int<\/span> fd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> event<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">init_server<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> port<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> SOCK_STREAM<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> serveraddr<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>serveraddr<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nserveraddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\nserveraddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htonl<\/span><span class=\"token punctuation\">(<\/span>INADDR_ANY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nserveraddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>serveraddr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;bind&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> sockfd<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">set_event_recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">size_t<\/span> len<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> flags<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_sqe<\/span> <span class=\"token operator\">*<\/span>sqe <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">io_uring_get_sqe<\/span><span class=\"token punctuation\">(<\/span>ring<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span> accept_info <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sockfd<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">.<\/span>event <span class=\"token operator\">&#061;<\/span> EVENT_READ<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">io_uring_prep_recv<\/span><span class=\"token punctuation\">(<\/span>sqe<span class=\"token punctuation\">,<\/span> sockfd<span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">,<\/span> flags<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>sqe<span class=\"token operator\">-&gt;<\/span>user_data<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>accept_info<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">set_event_send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">size_t<\/span> len<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> flags<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_sqe<\/span> <span class=\"token operator\">*<\/span>sqe <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">io_uring_get_sqe<\/span><span class=\"token punctuation\">(<\/span>ring<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span> accept_info <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sockfd<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">.<\/span>event <span class=\"token operator\">&#061;<\/span> EVENT_WRITE<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">io_uring_prep_send<\/span><span class=\"token punctuation\">(<\/span>sqe<span class=\"token punctuation\">,<\/span> sockfd<span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">,<\/span> flags<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>sqe<span class=\"token operator\">-&gt;<\/span>user_data<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>accept_info<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">set_event_accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> <span class=\"token operator\">*<\/span>ring<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span>addr<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">socklen_t<\/span> <span class=\"token operator\">*<\/span>addrlen<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> flags<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_sqe<\/span> <span class=\"token operator\">*<\/span>sqe <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">io_uring_get_sqe<\/span><span class=\"token punctuation\">(<\/span>ring<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span> accept_info <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">.<\/span>fd <span class=\"token operator\">&#061;<\/span> sockfd<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">.<\/span>event <span class=\"token operator\">&#061;<\/span> EVENT_ACCEPT<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">io_uring_prep_accept<\/span><span class=\"token punctuation\">(<\/span>sqe<span class=\"token punctuation\">,<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>addr<span class=\"token punctuation\">,<\/span> addrlen<span class=\"token punctuation\">,<\/span> flags<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>sqe<span class=\"token operator\">-&gt;<\/span>user_data<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>accept_info<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> argc<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> port <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">9999<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">init_server<\/span><span class=\"token punctuation\">(<\/span>port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_params<\/span> params<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>params<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>params<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring<\/span> ring<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">io_uring_queue_init_params<\/span><span class=\"token punctuation\">(<\/span>ENTRIES_LENGTH<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>params<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> clientaddr<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">socklen_t<\/span> len <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>clientaddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">set_event_accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>clientaddr<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>len<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span>BUFFER_LENGTH<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token function\">io_uring_submit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_cqe<\/span> <span class=\"token operator\">*<\/span>cqe<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">io_uring_wait_cqe<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>cqe<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_cqe<\/span> <span class=\"token operator\">*<\/span>cqes<span class=\"token punctuation\">[<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> nready <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">io_uring_peek_batch_cqe<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> cqes<span class=\"token punctuation\">,<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ epoll_wait<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>i <span class=\"token operator\">&lt;<\/span> nready<span class=\"token punctuation\">;<\/span>i <span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">io_uring_cqe<\/span> <span class=\"token operator\">*<\/span>entries <span class=\"token operator\">&#061;<\/span> cqes<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span> result<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>result<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>entries<span class=\"token operator\">-&gt;<\/span>user_data<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">conn_info<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>event <span class=\"token operator\">&#061;&#061;<\/span> EVENT_ACCEPT<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token function\">set_event_accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>clientaddr<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>len<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> connfd <span class=\"token operator\">&#061;<\/span> entries<span class=\"token operator\">-&gt;<\/span>res<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">set_event_recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> connfd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> BUFFER_LENGTH<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>event <span class=\"token operator\">&#061;&#061;<\/span> EVENT_READ<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> entries<span class=\"token operator\">-&gt;<\/span>res<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">set_event_send<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> ret<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>  <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>event <span class=\"token operator\">&#061;&#061;<\/span> EVENT_WRITE<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> entries<span class=\"token operator\">-&gt;<\/span>res<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">set_event_recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">.<\/span>fd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> BUFFER_LENGTH<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">io_uring_cq_advance<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>ring<span class=\"token punctuation\">,<\/span> nready<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>4. io_uring\u673a\u5236\u5bf9\u6bd4epoll\u673a\u5236<\/h5>\n<ul>\n<li>epoll\u901a\u8fc7epoll_ctl\u589e\u52a0\u5173\u6ce8\u7684\u4e8b\u4ef6\u4e4b\u540e&#xff0c;\u53ea\u8981\u4e0d\u5220\u9664&#xff0c;\u4e0b\u4e00\u6b21\u6267\u884cepoll_wait\u65f6fd\u53d1\u751f\u4e8b\u4ef6\u4ecd\u7136\u80fd\u591f\u8fd4\u56de&#xff0c;\u4f46\u662fio_uring\u6ce8\u518c\u4e8b\u4ef6\u5e76\u8fd4\u56de\u4e8b\u4ef6\u540e&#xff0c;\u5982\u679c\u9700\u8981\u7ee7\u7eed\u5173\u6ce8\u4e8b\u4ef6&#xff0c;\u5219\u9700\u8981\u91cd\u65b0\u6ce8\u518c&#xff1b;<\/li>\n<li>epoll_wait\u8fd4\u56de\u4e8b\u4ef6\u65f6&#xff0c;\u662f\u68c0\u6d4b\u5230io\u4e8b\u4ef6\u53d1\u751f&#xff0c;\u7528\u6237\u5c42\u4ecd\u7136\u9700\u8981\u5bf9io\u8fdb\u884c\u5177\u4f53\u7684\u64cd\u4f5c&#xff0c;\u662freactor\u6a21\u5f0f&#xff1b;io_uring\u7684CQ\u8fd4\u56de\u65f6&#xff0c;io\u64cd\u4f5c\u5df2\u7ecf\u5b8c\u6210&#xff0c;\u662fproactor\u6a21\u5f0f&#xff1b;<\/li>\n<li>io_uring\u53ef\u4ee5\u4e00\u6b21\u6027\u63d0\u4ea4\u591a\u4e2aio\u8bf7\u6c42&#xff0c;\u51cf\u5c11\u7cfb\u7edf\u8c03\u7528\u6b21\u6570&#xff1b;<\/li>\n<\/ul>\n<p>\u6700\u540e&#xff0c;\u63a8\u8350\u4e00\u4e2aLinux c\/c&#043;&#043;\u5185\u5bb9\u5b66\u4e60\u5e73\u53f0<\/p>\n<p>https:\/\/github.com\/0voice<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.1k\u6b21\uff0c\u70b9\u8d5e11\u6b21\uff0c\u6536\u85cf14\u6b21\u3002Linux\u7cfb\u7edf\u4e2dio_uring\u662f2019\u5e74\u9996\u6b21\u51fa\u73b0\u7684\u4e00\u4e2a\u65b0\u7684\u5f02\u6b65IO\u6846\u67b6\uff0c\u7528\u4e8e\u5b9e\u73b0\u9ad8\u6548\u7684\u5f02\u6b65IO\u64cd\u4f5c\u3002_linux iouring udp<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[174,58,43,78],"topic":[],"class_list":["post-31660","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-linux","tag-43","tag-78"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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