{"id":16688,"date":"2024-11-18T11:03:43","date_gmt":"2024-11-18T03:03:43","guid":{"rendered":"https:\/\/fwq.ai\/blog\/16688\/"},"modified":"2024-11-18T11:03:43","modified_gmt":"2024-11-18T03:03:43","slug":"linux%e7%bb%8f%e5%85%b8%e7%9a%84%e5%87%a0%e6%ac%be%e6%94%b6%e5%8c%85%e5%bc%95%e6%93%8e","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/16688\/","title":{"rendered":"Linux\u7ecf\u5178\u7684\u51e0\u6b3e\u6536\u5305\u5f15\u64ce"},"content":{"rendered":"<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u672c\u6587\u5217\u4e3e\u56db\u4e2a\u6bd4\u8f83\u7ecf\u5178\u7684 Linux \u6536\u5305\u5f15\u64ce\uff0c\u5982\u679c\u8fd8\u6709\u5176\u4ed6\u4f60\u89c9\u5f97ok\u7684\u53ef\u4ee5\u7559\u8a00\u3002\u8fd9\u56db\u4e2a\u5206\u522b\u662f\uff1a<\/p>\n<ul>\n<li>  libpcap\/libpcap-mmap <\/li>\n<li>  PF_RING <\/li>\n<li>  DPDK <\/li>\n<li>  xdp <\/li>\n<\/ul>\n<h2><span style=\"padding-left: 10px;font-size: 18px\">libpcap<\/span><\/h2>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">libpcap\u7684\u5305\u6355\u83b7\u673a\u5236\u662f\u5728\u6570\u636e\u94fe\u8def\u5c42\u589e\u52a0\u4e00\u4e2a\u65c1\u8def\u5904\u7406\uff0c\u4e0d\u5e72\u6270\u7cfb\u7edf\u81ea\u8eab\u7684\u7f51\u8def\u534f\u8bae\u6808\u7684\u5904\u7406\uff0c\u5bf9\u53d1\u9001\u548c\u63a5\u6536\u7684\u6570\u636e\u5305\u901a\u8fc7Linux\u5185\u6838\u505a\u8fc7\u6ee4\u548c\u7f13\u51b2\u5904\u7406\uff0c\u6700\u540e\u76f4\u63a5\u4f20\u9012\u7ed9\u4e0a\u5c42\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<ol>\n<li>  \u6570\u636e\u5305\u5230\u8fbe\u7f51\u5361\u8bbe\u5907\u3002 <\/li>\n<li>  \u7f51\u5361\u8bbe\u5907\u4f9d\u636e\u914d\u7f6e\u8fdb\u884cDMA\u64cd\u4f5c\u3002\uff08 <span>&nbsp;<\/span> <strong>\u300c\u7b2c1\u6b21\u62f7\u8d1d\u300d<\/strong> <span>&nbsp;<\/span>\uff1a\u7f51\u5361\u5bc4\u5b58\u5668-&gt;\u5185\u6838\u4e3a\u7f51\u5361\u5206\u914d\u7684\u7f13\u51b2\u533aring buffer\uff09 <\/li>\n<li>  \u7f51\u5361\u53d1\u9001\u4e2d\u65ad\uff0c\u5524\u9192\u5904\u7406\u5668\u3002 <\/li>\n<li>  \u9a71\u52a8\u8f6f\u4ef6\u4ecering buffer\u4e2d\u8bfb\u53d6\uff0c\u586b\u5145\u5185\u6838skbuff\u7ed3\u6784\uff08 <span>&nbsp;<\/span> <strong>\u300c\u7b2c2\u6b21\u62f7\u8d1d\u300d<\/strong> <span>&nbsp;<\/span>\uff1a\u5185\u6838\u7f51\u5361\u7f13\u51b2\u533aring buffer-&gt;\u5185\u6838\u4e13\u7528\u6570\u636e\u7ed3\u6784skbuff\uff09 <\/li>\n<li>  \u63a5\u7740\u8c03\u7528netif_receive_skb\u51fd\u6570\uff1a <\/li>\n<\/ol>\n<ul>\n<li>  5.1 \u5982\u679c\u6709\u6293\u5305\u7a0b\u5e8f\uff0c\u7531\u7f51\u7edc\u5206\u63a5\u53e3\u8fdb\u5165BPF\u8fc7\u6ee4\u5668\uff0c\u5c06\u89c4\u5219\u5339\u914d\u7684\u62a5\u6587\u62f7\u8d1d\u5230\u7cfb\u7edf\u5185\u6838\u7f13\u5b58 \uff08 <span>&nbsp;<\/span> <strong>\u300c\u7b2c3\u6b21\u62f7\u8d1d\u300d<\/strong> <span>&nbsp;<\/span>\uff09\u3002BPF\u4e3a\u6bcf\u4e00\u4e2a\u8981\u6c42\u670d\u52a1\u7684\u6293\u5305\u7a0b\u5e8f\u5173\u8054\u4e00\u4e2afilter\u548c\u4e24\u4e2abuffer\u3002BPF\u5206\u914dbuffer \u4e14\u901a\u5e38\u60c5\u51b5\u4e0b\u5b83\u7684\u989d\u5ea6\u662f4KB the store buffer \u88ab\u4f7f\u7528\u6765\u63a5\u6536\u6765\u81ea\u9002\u914d\u5668\u7684\u6570\u636e\uff1bthe hold buffer\u88ab\u4f7f\u7528\u6765\u62f7\u8d1d\u5305\u5230\u5e94\u7528\u7a0b\u5e8f\u3002 <\/li>\n<li>  5.2 \u5904\u7406\u6570\u636e\u94fe\u8def\u5c42\u7684\u6865\u63a5\u529f\u80fd\uff1b <\/li>\n<li>  5.3 \u6839\u636eskb-&gt;protocol\u5b57\u6bb5\u786e\u5b9a\u4e0a\u5c42\u534f\u8bae\u5e76\u63d0\u4ea4\u7ed9\u7f51\u7edc\u5c42\u5904\u7406\uff0c\u8fdb\u5165\u7f51\u7edc\u534f\u8bae\u6808\uff0c\u8fdb\u884c\u9ad8\u5c42\u5904\u7406\u3002 <\/li>\n<li>  libpcap\u7ed5\u8fc7\u4e86Linux\u5185\u6838\u6536\u5305\u6d41\u7a0b\u4e2d\u534f\u8bae\u6808\u90e8\u5206\u7684\u5904\u7406\uff0c\u4f7f\u5f97\u7528\u6237\u7a7a\u95f4API\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\u5957\u63a5\u5b57PF_PACKET\u4ece\u94fe\u8def\u5c42\u9a71\u52a8\u7a0b\u5e8f\u4e2d\u83b7\u5f97\u6570\u636e\u62a5\u6587\u7684\u62f7\u8d1d\uff0c\u5c06\u5176\u4ece\u5185\u6838\u7f13\u51b2\u533a\u62f7\u8d1d\u81f3\u7528\u6237\u7a7a\u95f4\u7f13\u51b2\u533a\uff08 <span>&nbsp;<\/span> <strong>\u300c\u7b2c4\u6b21\u62f7\u8d1d\u300d<\/strong> <span>&nbsp;<\/span>\uff09 <\/li>\n<h2><span style=\"padding-left: 10px;font-size: 18px\">libpcap-mmap<\/span><\/h2>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">libpcap-mmap\u662f\u5bf9\u65e7\u7684libpcap\u5b9e\u73b0\u7684\u6539\u8fdb\uff0c\u65b0\u7248\u672c\u7684libpcap\u57fa\u672c\u90fd\u91c7\u7528packet_mmap\u673a\u5236\u3002PACKET_MMAP\u901a\u8fc7mmap\uff0c\u51cf\u5c11\u4e00\u6b21\u5185\u5b58\u62f7\u8d1d\uff08<span>&nbsp;<\/span><strong>\u300c\u7b2c4\u6b21\u62f7\u8d1d\u6ca1\u6709\u4e86\u300d<\/strong><span>&nbsp;<\/span>\uff09\uff0c\u51cf\u5c11\u4e86\u9891\u7e41\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u62a5\u6587\u6355\u83b7\u7684\u6548\u7387\u3002<\/p>\n<h2><span style=\"padding-left: 10px;font-size: 18px\">PF_RING<\/span><\/h2>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u6211\u4eec\u770b\u5230\u4e4b\u524dlibpcap\u67094\u6b21\u5185\u5b58\u62f7\u8d1d\u3002libpcap_mmap\u67093\u6b21\u5185\u5b58\u62f7\u8d1d\u3002PF_RING\u63d0\u51fa\u7684\u6838\u5fc3\u89e3\u51b3\u65b9\u6848\u4fbf\u662f\u51cf\u5c11\u62a5\u6587\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u62f7\u8d1d\u6b21\u6570\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u76f8\u5bf9\u4e0elibpcap_mmap\u6765\u8bf4\uff0cpfring\u5141\u8bb8\u7528\u6237\u7a7a\u95f4\u5185\u5b58\u76f4\u63a5\u548crx_buffer\u505ammap\u3002\u8fd9\u53c8\u51cf\u5c11\u4e86\u4e00\u6b21\u62f7\u8d1d \uff08<span>&nbsp;<\/span><strong>\u300clibpcap_mmap\u7684\u7b2c2\u6b21\u62f7\u8d1d\u300d<\/strong>\uff1arx_buffer-&gt;skb\uff09<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">PF-RING ZC\u5b9e\u73b0\u4e86DNA\uff08Direct NIC Access \u76f4\u63a5\u7f51\u5361\u8bbf\u95ee\uff09\u6280\u672f\uff0c\u5c06\u7528\u6237\u5185\u5b58\u7a7a\u95f4\u6620\u5c04\u5230\u9a71\u52a8\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u4f7f\u7528\u6237\u7684\u5e94\u7528\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u7f51\u5361\u7684\u5bc4\u5b58\u5668\u548c\u6570\u636e\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u901a\u8fc7\u8fd9\u6837\u7684\u65b9\u5f0f\uff0c\u907f\u514d\u4e86\u5728\u5185\u6838\u5bf9\u6570\u636e\u5305\u7f13\u5b58\uff0c\u51cf\u5c11\u4e86\u4e00\u6b21\u62f7\u8d1d\uff08<span>&nbsp;<\/span><strong>\u300clibpcap\u7684\u7b2c1\u6b21\u62f7\u8d1d\u300d<\/strong><span>&nbsp;<\/span>\uff0cDMA\u5230\u5185\u6838\u7f13\u51b2\u533a\u7684\u62f7\u8d1d\uff09\u3002\u8fd9\u5c31\u662f\u5b8c\u5168\u7684\u96f6\u62f7\u8d1d\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u5176\u7f3a\u70b9\u662f\uff0c\u53ea\u6709\u4e00\u4e2a \u5e94\u7528\u53ef\u4ee5\u5728\u67d0\u4e2a\u65f6\u95f4\u6253\u5f00DMA ring\uff08\u8bf7\u6ce8\u610f\uff0c\u73b0\u5728\u7684\u7f51\u5361\u53ef\u4ee5\u5177\u6709\u591a\u4e2aRX \/ TX\u961f\u5217\uff0c\u4ece\u800c\u5c31\u53ef\u4ee5\u5728\u6bcf\u4e2a\u961f\u5217\u4e0a\u540c\u65f6\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\uff09\uff0c\u6362\u800c\u8a00\u4e4b\uff0c\u7528\u6237\u6001\u7684\u591a\u4e2a\u5e94\u7528\u9700\u8981\u5f7c\u6b64\u6c9f\u901a\u624d\u80fd\u5206\u53d1\u6570\u636e\u5305\u3002<\/p>\n<h2><span style=\"padding-left: 10px;font-size: 18px\">DPDK<\/span><\/h2>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">pf-ring zc\u548cdpdk\u5747\u53ef\u4ee5\u5b9e\u73b0\u6570\u636e\u5305\u7684\u96f6\u62f7\u8d1d\uff0c\u4e24\u8005\u5747\u65c1\u8def\u4e86\u5185\u6838\uff0c\u4f46\u662f\u5b9e\u73b0\u539f\u7406\u7565\u6709\u4e0d\u540c\u3002pf-ring zc\u901a\u8fc7zc\u9a71\u52a8\uff08\u4e5f\u5728\u5e94\u7528\u5c42\uff09\u63a5\u7ba1\u6570\u636e\u5305\uff0cdpdk\u57fa\u4e8eUIO\u5b9e\u73b0\u3002<\/p>\n<h3><span>1 UIO+mmap \u5b9e\u73b0\u96f6\u62f7\u8d1d\uff08zero copy\uff09<\/span><\/h3>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">UIO\uff08Userspace I\/O\uff09\u662f\u8fd0\u884c\u5728\u7528\u6237\u7a7a\u95f4\u7684I\/O\u6280\u672f\u3002Linux\u7cfb\u7edf\u4e2d\u4e00\u822c\u7684\u9a71\u52a8\u8bbe\u5907\u90fd\u662f\u8fd0\u884c\u5728\u5185\u6838\u7a7a\u95f4\uff0c\u800c\u5728\u7528\u6237\u7a7a\u95f4\u7528\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528\u5373\u53ef\uff0c\u800cUIO\u5219\u662f\u5c06\u9a71\u52a8\u7684\u5f88\u5c11\u4e00\u90e8\u5206\u8fd0\u884c\u5728\u5185\u6838\u7a7a\u95f4\uff0c\u800c\u5728\u7528\u6237\u7a7a\u95f4\u5b9e\u73b0\u9a71\u52a8\u7684\u7edd\u5927\u591a\u6570\u529f\u80fd\u3002\u91c7\u7528Linux\u63d0\u4f9bUIO\u673a\u5236\uff0c\u53ef\u4ee5\u65c1\u8defKernel\uff0c\u5c06\u6240\u6709\u62a5\u6587\u5904\u7406\u7684\u5de5\u4f5c\u5728\u7528\u6237\u7a7a\u95f4\u5b8c\u6210\u3002<\/p>\n<h3><span>2 UIO+PMD \u51cf\u5c11\u4e2d\u65ad\u548cCPU\u4e0a\u4e0b\u6587\u5207\u6362<\/span><\/h3>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">DPDK\u7684UIO\u9a71\u52a8\u5c4f\u853d\u4e86\u786c\u4ef6\u53d1\u51fa\u4e2d\u65ad\uff0c\u7136\u540e\u5728\u7528\u6237\u6001\u91c7\u7528\u4e3b\u52a8\u8f6e\u8be2\u7684\u65b9\u5f0f\uff0c\u8fd9\u79cd\u6a21\u5f0f\u88ab\u79f0\u4e3aPMD\uff08Poll Mode Driver\uff09\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u4e0eDPDK\u76f8\u6bd4\uff0cpf-ring\uff08no zc\uff09\u4f7f\u7528\u7684\u662fNAPI polling\u548c\u5e94\u7528\u5c42polling\uff0c\u800cpf-ring zc\u4e0eDPDK\u7c7b\u4f3c\uff0c\u4ec5\u4f7f\u7528\u5e94\u7528\u5c42polling\u3002<\/p>\n<h3><span>3 HugePages \u51cf\u5c11TLB miss<\/span><\/h3>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u5728\u64cd\u4f5c\u7cfb\u7edf\u5f15\u5165MMU\uff08Memory Management Unit\uff09\u540e\uff0cCPU\u8bfb\u53d6\u5185\u5b58\u7684\u6570\u636e\u9700\u8981\u4e24\u6b21\u8bbf\u95ee\u5185\u5b58\u3002\u7b2c\u4e00\u6b21\u8981\u67e5\u8be2\u9875\u8868\u5c06\u903b\u8f91\u5730\u5740\u8f6c\u6362\u4e3a\u7269\u7406\u5730\u5740\uff0c\u7136\u540e\u8bbf\u95ee\u8be5\u7269\u7406\u5730\u5740\u8bfb\u53d6\u6570\u636e\u6216\u6307\u4ee4\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u4e3a\u4e86\u51cf\u5c11\u9875\u6570\u8fc7\u591a\uff0c\u9875\u8868\u8fc7\u5927\u800c\u5bfc\u81f4\u7684\u67e5\u8be2\u65f6\u95f4\u8fc7\u957f\u7684\u95ee\u9898\uff0c\u4fbf\u5f15\u5165\u4e86TLB(Translation Lookaside Buffer)\uff0c\u53ef\u7ffb\u8bd1\u4e3a\u5730\u5740\u8f6c\u6362\u7f13\u51b2\u5668\u3002TLB\u662f\u4e00\u4e2a\u5185\u5b58\u7ba1\u7406\u5355\u5143\uff0c\u4e00\u822c\u5b58\u50a8\u5728\u5bc4\u5b58\u5668\u4e2d\uff0c\u91cc\u9762\u5b58\u50a8\u4e86\u5f53\u524d\u6700\u53ef\u80fd\u88ab\u8bbf\u95ee\u5230\u7684\u4e00\u5c0f\u90e8\u5206\u9875\u8868\u9879\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u5f15\u5165TLB\u540e\uff0cCPU\u4f1a\u9996\u5148\u53bbTLB\u4e2d\u5bfb\u5740\uff0c\u7531\u4e8eTLB\u5b58\u653e\u5728\u5bc4\u5b58\u5668\u4e2d\uff0c\u4e14\u5176\u53ea\u5305\u542b\u4e00\u5c0f\u90e8\u5206\u9875\u8868\u9879\uff0c\u56e0\u6b64\u67e5\u8be2\u901f\u5ea6\u975e\u5e38\u5feb\u3002\u82e5TLB\u4e2d\u5bfb\u5740\u6210\u529f\uff08TLB hit\uff09\uff0c\u5219\u65e0\u9700\u518d\u53bbRAM\u4e2d\u67e5\u8be2\u9875\u8868\uff1b\u82e5TLB\u4e2d\u5bfb\u5740\u5931\u8d25\uff08TLB miss\uff09\uff0c\u5219\u9700\u8981\u53bbRAM\u4e2d\u67e5\u8be2\u9875\u8868\uff0c\u67e5\u8be2\u5230\u540e\uff0c\u4f1a\u5c06\u8be5\u9875\u66f4\u65b0\u81f3TLB\u4e2d\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u800cDPDK\u91c7\u7528HugePages \uff0c\u5728x86-64\u4e0b\u652f\u63012MB\u30011GB\u7684\u9875\u5927\u5c0f\uff0c\u5927\u5927\u964d\u4f4e\u4e86\u603b\u9875\u4e2a\u6570\u548c\u9875\u8868\u7684\u5927\u5c0f\uff0c\u4ece\u800c\u5927\u5927\u964d\u4f4eTLB miss\u7684\u51e0\u7387\uff0c\u63d0\u5347CPU\u5bfb\u5740\u6027\u80fd\u3002<\/p>\n<h3><span>4 \u5176\u5b83\u4f18\u5316<\/span><\/h3>\n<ul>\n<li>  SNA\uff08Shared-nothing Architecture\uff09\uff0c\u8f6f\u4ef6\u67b6\u6784\u53bb\u4e2d\u5fc3\u5316\uff0c\u5c3d\u91cf\u907f\u514d\u5168\u5c40\u5171\u4eab\uff0c\u5e26\u6765\u5168\u5c40\u7ade\u4e89\uff0c\u5931\u53bb\u6a2a\u5411\u6269\u5c55\u7684\u80fd\u529b\u3002NUMA\u4f53\u7cfb\u4e0b\u4e0d\u8de8Node\u8fdc\u7a0b\u4f7f\u7528\u5185\u5b58\u3002 <\/li>\n<li>  SIMD\uff08Single Instruction Multiple Data\uff09\uff0c\u4ece\u6700\u65e9\u7684mmx\/sse\u5230\u6700\u65b0\u7684avx2\uff0cSIMD\u7684\u80fd\u529b\u4e00\u76f4\u5728\u589e\u5f3a\u3002DPDK\u91c7\u7528\u6279\u91cf\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5305\uff0c\u518d\u7528\u5411\u91cf\u7f16\u7a0b\uff0c\u4e00\u4e2a\u5468\u671f\u5185\u5bf9\u6240\u6709\u5305\u8fdb\u884c\u5904\u7406\u3002\u6bd4\u5982\uff0cmemcpy\u5c31\u4f7f\u7528SIMD\u6765\u63d0\u9ad8\u901f\u5ea6\u3002 <\/li>\n<li>  cpu affinity\uff1a\u5373 CPU \u4eb2\u548c\u6027 <\/li>\n<\/ul>\n<h2><span style=\"padding-left: 10px;font-size: 18px\">XDP<\/span><\/h2>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">xdp\u4ee3\u8868eXpress\u6570\u636e\u8def\u5f84\uff0c\u4f7f\u7528ebpf \u505a\u5305\u8fc7\u6ee4\uff0c\u76f8\u5bf9\u4e8edpdk\u5c06\u6570\u636e\u5305\u76f4\u63a5\u9001\u5230\u7528\u6237\u6001\uff0c\u7528\u7528\u6237\u6001\u5f53\u505a\u5feb\u901f\u6570\u636e\u5904\u7406\u5e73\u9762\uff0cxdp\u662f\u5728\u9a71\u52a8\u5c42\u521b\u5efa\u4e86\u4e00\u4e2a\u6570\u636e\u5feb\u901f\u5e73\u9762\u3002\u5728\u6570\u636e\u88ab\u7f51\u5361\u786c\u4ef6dma\u5230\u5185\u5b58\uff0c\u5206\u914dskb\u4e4b\u524d\uff0c\u5bf9\u6570\u636e\u5305\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u8bf7\u6ce8\u610f\uff0cXDP\u5e76\u6ca1\u6709\u5bf9\u6570\u636e\u5305\u505aKernel bypass\uff0c\u5b83\u53ea\u662f\u63d0\u524d\u505a\u4e86\u4e00\u70b9\u9884\u68c0\u800c\u5df2\u3002<\/p>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">\u76f8\u5bf9\u4e8eDPDK\uff0cXDP\u5177\u6709\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>  \u65e0\u9700\u7b2c\u4e09\u65b9\u4ee3\u7801\u5e93\u548c\u8bb8\u53ef <\/li>\n<li>  \u540c\u65f6\u652f\u6301\u8f6e\u8be2\u5f0f\u548c\u4e2d\u65ad\u5f0f\u7f51\u7edc <\/li>\n<li>  \u65e0\u9700\u5206\u914d\u5927\u9875 <\/li>\n<li>  \u65e0\u9700\u4e13\u7528\u7684CPU <\/li>\n<li>  \u65e0\u9700\u5b9a\u4e49\u65b0\u7684\u5b89\u5168\u7f51\u7edc\u6a21\u578b <\/li>\n<\/ul>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">XDP\u7684\u4f7f\u7528\u573a\u666f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>  DDoS\u9632\u5fa1 <\/li>\n<li>  \u9632\u706b\u5899 <\/li>\n<li>  \u57fa\u4e8eXDP_TX\u7684\u8d1f\u8f7d\u5747\u8861 <\/li>\n<li>  \u7f51\u7edc\u7edf\u8ba1 <\/li>\n<li>  \u590d\u6742\u7f51\u7edc\u91c7\u6837 <\/li>\n<li>  \u9ad8\u901f\u4ea4\u6613\u5e73\u53f0 <\/li>\n<\/ul>\n<p style=\"margin-top: 10px;margin-bottom: 10px;padding-top: 8px;padding-bottom: 8px;font-family: Optima-Regular, Optima, PingFangTC-Light, PingFangSC-light, PingFangTC-light;font-size: 16px;letter-spacing: 2px;text-align: left;line-height: 26px\">OK\uff0c\u4ee5\u4e0a\u5c31\u662f\u4eca\u5929\u7684\u5206\u4eab\uff0c\u5982\u679c\u4f60\u89c9\u5f97\u8fd8\u6709\u5176\u4ed6\u7684\u6536\u5305\u5f15\u64ce\uff0c\u53ef\u4ee5\u7559\u8a00\u5206\u4eab\u3002<\/p>\n<p style=\"margin-right: 0.5em;margin-left: 0.5em;font-family: -apple-system-font, BlinkMacSystemFont,\"><\/p>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fLinux\u7ecf\u5178\u7684\u51e0\u6b3e\u6536\u5305\u5f15\u64ce\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u5217\u4e3e\u56db\u4e2a\u6bd4\u8f83\u7ecf\u5178\u7684 Linux \u6536\u5305\u5f15\u64ce\uff0c\u5982\u679c\u8fd8\u6709\u5176\u4ed6\u4f60\u89c9\u5f97ok\u7684\u53ef\u4ee5\u7559\u8a00\u3002\u8fd9\u56db\u4e2a\u5206\u522b\u662f\uff1a libpcap\/libpcap-mmap PF_RING DPDK xdp libpcap 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-16688","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/16688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=16688"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/16688\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=16688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=16688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=16688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}