{"id":33202,"date":"2025-03-04T11:43:34","date_gmt":"2025-03-04T03:43:34","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=33202"},"modified":"2025-03-04T11:43:34","modified_gmt":"2025-03-04T03:43:34","slug":"ebpf%e5%9c%a8%e8%be%b9%e7%bc%98%e8%ae%a1%e7%ae%97%e4%b8%ad%e7%9a%84%e6%bd%9c%e5%9c%a8%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/33202.html","title":{"rendered":"eBPF\u5728\u8fb9\u7f18\u8ba1\u7b97\u4e2d\u7684\u6f5c\u5728\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

\n

\"eBPF\u5728\u8fb9\u7f18\u8ba1\u7b97\u4e2d\u7684\u6f5c\u5728\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f\"<\/p>\n<\/p>\n

\u968f\u7740\u7269\u8054\u7f51\u8bbe\u5907\u6570\u91cf\u7a81\u7834200\u4ebf\u5927\u5173\uff0c\u5168\u7403\u6bcf\u5929\u4ea7\u751f\u7684\u8fb9\u7f18\u6570\u636e\u6b63\u4ee5\u6bcf\u79d22.5PB\u7684\u901f\u5ea6\u589e\u957f\u3002\u5728\u8fd9\u4e2a\u7531\u667a\u80fd\u6444\u50cf\u5934\u3001\u5de5\u4e1a\u4f20\u611f\u5668\u548c\u81ea\u52a8\u9a7e\u9a76\u6c7d\u8f66\u6784\u6210\u7684\u65b0\u6570\u5b57\u7586\u57df\u91cc\uff0c\u8fb9\u7f18\u8ba1\u7b97<\/strong>\u6b63\u5728\u7ecf\u5386\u4ece\u6982\u5ff5\u9a8c\u8bc1\u5230\u89c4\u6a21\u5316\u843d\u5730\u7684\u5173\u952e\u8f6c\u6298\u3002\u4f46\u968f\u4e4b\u800c\u6765\u7684\u7f51\u7edc\u5ef6\u8fdf\u6ce2\u52a8\u3001\u5f02\u6784\u786c\u4ef6\u9002\u914d\u3001\u5b9e\u65f6\u54cd\u5e94\u9700\u6c42\u4e09\u5927\u6280\u672f\u9e3f\u6c9f\uff0c\u6b63\u5728\u8003\u9a8c\u7740\u4f20\u7edf\u6280\u672f\u67b6\u6784\u7684\u6781\u9650\u3002\u6b63\u662f\u5728\u8fd9\u6837\u7684\u80cc\u666f\u4e0b\uff0c\u4e00\u79cd\u6e90\u81eaLinux\u5185\u6838\u7684\u9769\u65b0\u6280\u672f\u2014\u2014eBPF<\/a>\uff08\u6269\u5c55\u578b\u4f2f\u514b\u5229\u5305\u8fc7\u6ee4\u5668\uff09<\/strong>\uff0c\u6b63\u5728\u8fb9\u7f18\u8ba1\u7b97\u9886\u57df\u5c55\u73b0\u51fa\u60ca\u4eba\u7684\u9002\u914d\u6027\u3002\u8fd9\u9879\u6700\u521d\u7528\u4e8e\u7f51\u7edc\u6d41\u91cf\u5206\u6790\u7684\u6280\u672f\uff0c\u56e0\u5176\u96f6\u4fb5\u5165\u7684\u53ef\u7f16\u7a0b\u7279\u6027<\/strong>\u548c\u5185\u6838\u7ea7\u6267\u884c\u6548\u7387<\/strong>\uff0c\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u8fb9\u7f18\u8282\u70b9\u7684\u80fd\u529b\u8fb9\u754c\u3002<\/p>\n

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eBPF<\/a>\u901a\u8fc7\u5728\u5185\u6838\u7a7a\u95f4\u521b\u5efa\u865a\u62df\u5316\u6267\u884c\u73af\u5883<\/strong>\uff0c\u80fd\u591f\u5728\u4e0d\u4fee\u6539\u5185\u6838\u4ee3\u7801\u7684\u524d\u63d0\u4e0b\uff0c\u5b9e\u73b0\u7f51\u7edc\u6570\u636e\u5305\u7684\u6df1\u5ea6\u5904\u7406\u3002\u67d0\u5168\u7403\u5934\u90e8CDN\u670d\u52a1\u5546\u7684\u5b9e\u8df5\u8868\u660e\uff0c\u5728\u8fb9\u7f18\u8282\u70b9\u90e8\u7f72eBPF\u7a0b\u5e8f\u540e\uff0c\u89c6\u9891\u6d41\u4f20\u8f93\u7684\u5c3e\u5ef6\u8fdf\u964d\u4f4e42%\uff0cTCP\u91cd\u4f20\u6b21\u6570\u51cf\u5c1167%\u3002\u8fd9\u79cd\u6027\u80fd\u8dc3\u5347\u7684\u5173\u952e\u5728\u4e8eeBPF\u7a0b\u5e8f\u53ef\u4ee5\u76f4\u63a5\u5728\u7f51\u5361\u9a71\u52a8\u5c42\u8fdb\u884c\u6d41\u91cf\u6574\u5f62\uff0c\u907f\u514d\u4e86\u6570\u636e\u5305\u5728\u7528\u6237\u6001\u548c\u5185\u6838\u6001\u4e4b\u95f4\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u635f\u8017\u3002<\/p>\n

\u66f4\u503c\u5f97\u5173\u6ce8\u7684\u662f\uff0ceBPF\u652f\u6301\u7684XDP\uff08\u5feb\u901f\u6570\u636e\u8def\u5f84\uff09\u6280\u672f\uff0c\u4f7f\u5f97\u8fb9\u7f18\u7f51\u5173\u80fd\u591f\u5728\u63a5\u6536\u6570\u636e\u5305\u7684\u7b2c\u4e00\u65f6\u95f4\u505a\u51fa\u8f6c\u53d1\u51b3\u7b56\u3002\u5728\u667a\u80fd\u5de5\u5382\u7684\u5b9e\u6d4b\u4e2d\uff0c\u8fd9\u9879\u6280\u672f\u5c06\u5de5\u4e1a\u63a7\u5236\u6307\u4ee4\u7684\u7aef\u5230\u7aef\u5ef6\u8fdf\u7a33\u5b9a\u63a7\u5236\u5728800\u5fae\u79d2\u4ee5\u5185\uff0c\u6bd4\u4f20\u7edf\u65b9\u6848\u63d0\u5347\u4e24\u4e2a\u6570\u91cf\u7ea7\u3002<\/p>\n

\u4e8c\u3001\u5b89\u5168\u9632\u62a4\u7684\u8303\u5f0f\u8f6c\u79fb<\/h3>\n

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\u67d0\u81ea\u52a8\u9a7e\u9a76\u89e3\u51b3\u65b9\u6848\u63d0\u4f9b\u5546\u6784\u5efa\u7684eBPF\u5b89\u5168\u6846\u67b6\uff0c\u80fd\u591f\u5728\u8f66\u8f7dECU\u4e2d\u5b9e\u65f6\u8ffd\u8e2a400+\u4e2a\u7cfb\u7edf\u8c03\u7528\u3002\u901a\u8fc7\u5efa\u7acb\u8fdb\u7a0b\u884c\u4e3a\u57fa\u7ebf\u6a21\u578b\uff0c\u8be5\u65b9\u6848\u6210\u529f\u62e6\u622a\u4e86\u4f2a\u88c5\u6210\u6b63\u5e38\u901a\u4fe1\u7684CAN\u603b\u7ebf\u6ce8\u5165\u653b\u51fb\u3002\u8fd9\u79cd\u6df1\u5ea6\u53ef\u89c1\u6027\u6765\u81eaeBPF\u7a0b\u5e8f\u5bf9Linux\u5185\u6838\u7684\u5168\u9762\u89c2\u6d4b\u80fd\u529b\uff0c\u5305\u62ec\u6587\u4ef6\u64cd\u4f5c\u3001\u7f51\u7edc\u8fde\u63a5\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7b4920\u4f59\u7c7b\u4e8b\u4ef6\u3002<\/p>\n

\u66f4\u91cd\u8981\u7684\u662f\uff0ceBPF\u7a0b\u5e8f\u672c\u8eab\u8fd0\u884c\u5728\u9a8c\u8bc1\u5668\u4fdd\u62a4\u7684\u5b89\u5168\u6c99\u7bb1\u4e2d\uff0c\u5176\u5faa\u73af\u6b21\u6570\u3001\u5185\u5b58\u8bbf\u95ee\u8303\u56f4\u90fd\u53d7\u5230\u4e25\u683c\u9650\u5236\u3002\u8fd9\u79cd\u8bbe\u8ba1\u4f7f\u5f97\u653b\u51fb\u8005\u5373\u4fbf\u83b7\u5f97root\u6743\u9650\uff0c\u4e5f\u96be\u4ee5\u7be1\u6539\u6b63\u5728\u8fd0\u884c\u7684\u5b89\u5168\u68c0\u6d4b\u903b\u8f91\uff0c\u4e3a\u8fb9\u7f18\u8bbe\u5907\u6784\u7b51\u8d77\u52a8\u6001\u9632\u5fa1\u7eb5\u6df1\u3002<\/p>\n

\u4e09\u3001\u5f02\u6784\u8d44\u6e90\u7684\u667a\u80fd\u8c03\u5ea6<\/h3>\n

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eBPF\u4e0eKubernetes\u7684\u7ed3\u5408<\/strong>\u6b63\u5728\u5f00\u521b\u8fb9\u7f18\u7f16\u6392\u65b0\u8303\u5f0f\u3002\u901a\u8fc7hook\u5185\u6838\u8c03\u5ea6\u5668\u7684\u5173\u952e\u8def\u5f84\uff0ceBPF\u7a0b\u5e8f\u53ef\u4ee5\u5b9e\u65f6\u611f\u77e5\u5de5\u4f5c\u8d1f\u8f7d\u7684QoS\u9700\u6c42\u3002\u5728\u67d0\u667a\u6167\u57ce\u5e02\u9879\u76ee\u4e2d\uff0c\u8fd0\u7ef4\u56e2\u961f\u5229\u7528\u8fd9\u79cd\u6280\u672f\u5b9e\u73b0\u4e86\u89c6\u9891\u5206\u6790\u4efb\u52a1\u7684\u52a8\u6001\u4f18\u5148\u7ea7\u8c03\u6574\uff1a\u5f53\u4ea4\u901a\u6d41\u91cf\u8d85\u8fc7\u9608\u503c\u65f6\uff0ceBPF\u81ea\u52a8\u63d0\u5347\u76f8\u5173\u5bb9\u5668\u7684CPU\u914d\u989d\uff0c\u786e\u4fdd\u8fdd\u7ae0\u8bc6\u522b\u54cd\u5e94\u65f6\u95f4\u59cb\u7ec8\u4f4e\u4e8e200ms\u3002<\/p>\n

\u66f4\u6709\u7a81\u7834\u6027\u7684\u662f\uff0ceBPF\u7684CO-RE\uff08\u4e00\u6b21\u7f16\u8bd1\uff0c\u5230\u5904\u8fd0\u884c\uff09\u7279\u6027\u5b8c\u7f8e\u89e3\u51b3\u4e86\u8fb9\u7f18\u8bbe\u5907\u7684\u5185\u6838\u7248\u672c\u788e\u7247\u5316\u95ee\u9898\u3002\u6d4b\u8bd5\u6570\u636e\u663e\u793a\uff0c\u540c\u4e00\u5957\u8d44\u6e90\u8c03\u5ea6\u7a0b\u5e8f\u53ef\u4ee5\u5728\u4eceCentOS 7\u5230Ubuntu 22.04\u7684\u4e0d\u540c\u7cfb\u7edf\u4e0a\u65e0\u7f1d\u8fd0\u884c\uff0c\u7248\u672c\u9002\u914d\u6210\u672c\u964d\u4f4e90%\u4ee5\u4e0a\u3002<\/p>\n

\u56db\u3001\u53ef\u89c2\u6d4b\u6027\u67b6\u6784\u7684\u91cd\u6784<\/h3>\n

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eBPF\u9a71\u52a8\u7684\u8fb9\u4e91\u534f\u540c\u89c2\u6d4b\u4f53\u7cfb<\/strong>\u6b63\u5728\u6539\u5199\u6e38\u620f\u89c4\u5219\u3002\u901a\u8fc7\u5728\u8fb9\u7f18\u8282\u70b9\u90e8\u7f72\u8f7b\u91cf\u7ea7eBPF\u63a2\u9488\uff0c\u80fd\u591f\u76f4\u63a5\u5728\u7f51\u7edc\u534f\u8bae\u6808\u5c42\u9762\u5bf9\u76d1\u63a7\u6570\u636e\u8fdb\u884c\u8fc7\u6ee4\u548c\u805a\u5408\u3002\u67d0\u5927\u578b\u96f6\u552e\u5546\u7684\u6848\u4f8b\u663e\u793a\uff0c\u8be5\u6280\u672f\u4f7f\u95e8\u5e97\u6444\u50cf\u5934\u7684\u72b6\u6001\u76d1\u63a7\u6570\u636e\u91cf\u51cf\u5c1182%\uff0c\u540c\u65f6\u5173\u952e\u6307\u6807\u91c7\u96c6\u9891\u7387\u63d0\u53474\u500d\u3002<\/p>\n

\u8fd9\u79cd\u6280\u672f\u7a81\u7834\u6e90\u4e8eeBPF\u7a0b\u5e8f\u5bf9\u5185\u6838\u6570\u636e\u7ed3\u6784\u7684\u76f4\u63a5\u8bbf\u95ee\u80fd\u529b\u3002\u4f8b\u5982\u5728\u5bb9\u5668\u573a\u666f\u4e0b\uff0c\u65e0\u9700\u8fdb\u5165\u5bb9\u5668\u5185\u90e8\uff0c\u5373\u53ef\u901a\u8fc7\u8ffd\u8e2acgroup\u5c42\u7ea7\u5173\u7cfb\uff0c\u7cbe\u51c6\u8ba1\u7b97\u6bcf\u4e2a\u5fae\u670d\u52a1\u7684\u8d44\u6e90\u6d88\u8017\u3002\u8fd9\u79cd\u89c2\u6d4b\u7ef4\u5ea6\u662f\u4f20\u7edf\u7528\u6237\u6001\u5de5\u5177\u5b8c\u5168\u65e0\u6cd5\u5b9e\u73b0\u7684\u3002<\/p>\n

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