{"id":21519,"date":"2024-11-14T12:13:02","date_gmt":"2024-11-14T04:13:02","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=21519"},"modified":"2024-11-14T12:13:02","modified_gmt":"2024-11-14T04:13:02","slug":"%e4%ba%86%e8%a7%a3ebpf%ef%bc%9a%e6%94%b9%e5%96%84%e7%b3%bb%e7%bb%9f%e8%bf%90%e7%bb%b4%e7%9a%84%e5%88%9b%e6%96%b0%e6%89%8b%e6%ae%b5","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/21519.html","title":{"rendered":"\u4e86\u89e3eBPF\uff1a\u6539\u5584\u7cfb\u7edf\u8fd0\u7ef4\u7684\u521b\u65b0\u624b\u6bb5"},"content":{"rendered":"<p>\t\t\t\t<![CDATA[\n\n<p><a href=\"https:\/\/www.yunshan.net\" target=\"_blank\" style=\"color:blue\" rel=\"noopener noreferrer\">eBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09\u662f\u4e00\u79cd\u9769\u547d\u6027\u7684\u6280\u672f\uff0c\u8fd1\u5e74\u6765\u5728\u7cfb\u7edf\u8fd0\u7ef4\u9886\u57df\u5f15\u8d77\u4e86\u5e7f\u6cdb\u5173\u6ce8\u3002\u5b83\u4e0d\u4ec5\u6781\u5927\u5730\u63d0\u5347\u4e86\u7f51\u7edc\u76d1\u63a7\u548c\u6027\u80fd\u5206\u6790\u7684\u6548\u7387\uff0c\u8fd8\u4e3a\u7cfb\u7edf\u5b89\u5168\u548c\u7ba1\u7406\u63d0\u4f9b\u4e86\u5168\u65b0\u7684\u89e3\u51b3\u65b9\u6848\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8<a href=\"https:\/\/www.yunshan.net\" target=\"_blank\" style=\"color:blue\" rel=\"noopener noreferrer\">eBPF<\/a>\u7684\u539f\u7406\u3001\u5e94\u7528\u573a\u666f\u53ca\u5176\u5728\u6539\u5584\u7cfb\u7edf\u8fd0\u7ef4\u4e2d\u7684\u521b\u65b0\u624b\u6bb5\u3002<\/p>\n\n\n\n\n<h3>eBPF\u7684\u57fa\u672c\u539f\u7406<\/h3>\n\n\n\n\n<p>eBPF\u8d77\u6e90\u4e8e\u4f20\u7edf\u7684BPF\uff08Berkeley Packet Filter\uff09\uff0c\u6700\u521d\u7528\u4e8e\u7f51\u7edc\u6570\u636e\u5305\u7684\u8fc7\u6ee4\u3002\u7136\u800c\uff0c\u968f\u7740\u6280\u672f\u7684\u53d1\u5c55\uff0ceBPF\u88ab\u6269\u5c55\u4e3a\u4e00\u79cd\u901a\u7528\u7684\u6267\u884c\u5f15\u64ce\uff0c\u80fd\u591f\u5728\u5185\u6838\u4e2d\u8fd0\u884c\u7528\u6237\u5b9a\u4e49\u7684\u7a0b\u5e8f\uff0c\u800c\u65e0\u9700\u4fee\u6539\u5185\u6838\u4ee3\u7801\u6216\u52a0\u8f7d\u5185\u6838\u6a21\u5757\u3002<\/p>\n\n\n\n\n\n\n\n\n<p align=center><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2024\/11\/OAgI23J1Q6.jpg\" width=1000><\/p>\n\n\n\n\n\n\n\n\n\n<h4>eBPF\u7684\u5de5\u4f5c\u673a\u5236<\/h4>\n\n\n\n\n<ol>\n\n\n<li><strong>\u7f16\u8bd1\u548c\u52a0\u8f7d<\/strong>\uff1a\u7528\u6237\u7f16\u5199\u7684eBPF\u7a0b\u5e8f\u9996\u5148\u88ab\u7f16\u8bd1\u6210eBPF\u6307\u4ee4\u96c6\uff0c\u7136\u540e\u901a\u8fc7\u7279\u5b9a\u7684\u5de5\u5177\uff08\u5982bpftrace\u6216BCC\uff09\u52a0\u8f7d\u5230\u5185\u6838\u4e2d\u3002<\/li>\n\n\n\n\n<li><strong>\u9a8c\u8bc1\u548c\u6267\u884c<\/strong>\uff1a\u5185\u6838\u4e2d\u7684eBPF\u9a8c\u8bc1\u5668\u4f1a\u5bf9\u52a0\u8f7d\u7684\u7a0b\u5e8f\u8fdb\u884c\u4e25\u683c\u7684\u5b89\u5168\u68c0\u67e5\uff0c\u786e\u4fdd\u5176\u4e0d\u4f1a\u5bf9\u7cfb\u7edf\u7a33\u5b9a\u6027\u9020\u6210\u5a01\u80c1\u3002\u901a\u8fc7\u9a8c\u8bc1\u540e\uff0ceBPF\u7a0b\u5e8f\u4f1a\u88ab JIT\uff08Just-In-Time\uff09\u7f16\u8bd1\u5668\u8f6c\u6362\u6210\u673a\u5668\u7801\uff0c\u4ee5\u4fbf\u9ad8\u6548\u6267\u884c\u3002<\/li>\n\n\n\n\n<li><strong>\u6570\u636e\u6536\u96c6<\/strong>\uff1aeBPF\u7a0b\u5e8f\u53ef\u4ee5\u6302\u94a9\u5230\u5185\u6838\u7684\u5404\u79cd\u4e8b\u4ef6\uff08\u5982\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u4e8b\u4ef6\u7b49\uff09\uff0c\u5b9e\u65f6\u6536\u96c6\u6570\u636e\uff0c\u5e76\u901a\u8fc7\u7279\u5b9a\u7684\u6570\u636e\u7ed3\u6784\uff08\u5982BPF maps\uff09\u4f20\u9012\u7ed9\u7528\u6237\u7a7a\u95f4\u3002<\/li>\n\n\n<\/ol>\n\n\n\n\n<h3>eBPF\u7684\u5e94\u7528\u573a\u666f<\/h3>\n\n\n\n\n<p>eBPF\u7684\u7075\u6d3b\u6027\u548c\u9ad8\u6548\u6027\u4f7f\u5176\u5728\u591a\u4e2a\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u5c24\u5176\u662f\u5728\u7cfb\u7edf\u8fd0\u7ef4\u65b9\u9762\u3002<\/p>\n\n\n\n\n<h4>1. 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maps\u7b49\u6570\u636e\u7ed3\u6784\uff0c\u5b9e\u73b0\u4e86\u9ad8\u6548\u7684\u6570\u636e\u5b58\u50a8\u548c\u4f20\u8f93\u3002BPF maps\u652f\u6301\u591a\u79cd\u7c7b\u578b\uff08\u5982\u54c8\u5e0c\u8868\u3001\u6570\u7ec4\u7b49\uff09\uff0c\u53ef\u4ee5\u7075\u6d3b\u5730\u5b58\u50a8\u548c\u67e5\u8be2\u6570\u636e\u3002<\/p>\n\n\n\n\n<p><strong>\u6848\u4f8b\uff1a\u6d41\u91cf\u7edf\u8ba1<\/strong><\/p>\n\n\n\n\n<p>\u901a\u8fc7eBPF\u7a0b\u5e8f\u6536\u96c6\u7f51\u7edc\u6d41\u91cf\u6570\u636e\uff0c\u5e76\u5b58\u50a8\u5230BPF maps\u4e2d\uff0c\u7528\u6237\u7a7a\u95f4\u7a0b\u5e8f\u53ef\u4ee5\u9ad8\u6548\u5730\u67e5\u8be2\u548c\u5206\u6790\u8fd9\u4e9b\u6570\u636e\uff0c\u751f\u6210\u6d41\u91cf\u7edf\u8ba1\u62a5\u8868\u3002<\/p>\n\n\n\n\n<h4>3. 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