{"id":35287,"date":"2025-03-19T09:34:10","date_gmt":"2025-03-19T01:34:10","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=35287"},"modified":"2025-03-19T09:34:10","modified_gmt":"2025-03-19T01:34:10","slug":"ebpf%e5%9c%a8%e8%99%9a%e6%8b%9f%e5%8c%96%e6%8a%80%e6%9c%af%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8%e6%9c%89%e5%93%aa%e4%ba%9b%e5%88%9b%e6%96%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/35287.html","title":{"rendered":"eBPF\u5728\u865a\u62df\u5316\u6280\u672f\u4e2d\u7684\u5e94\u7528\u6709\u54ea\u4e9b\u521b\u65b0\uff1f"},"content":{"rendered":"

\n

\"eBPF\u5728\u865a\u62df\u5316\u6280\u672f\u4e2d\u7684\u5e94\u7528\u6709\u54ea\u4e9b\u521b\u65b0\uff1f\"<\/p>\n<\/p>\n

\u5728\u4e91\u8ba1\u7b97\u4e0e\u5bb9\u5668\u5316\u6280\u672f\u5e2d\u5377\u5168\u7403\u7684\u4eca\u5929\uff0c\u865a\u62df\u5316\u6280\u672f\u6b63\u7ecf\u5386\u7740\u4ece\u786c\u4ef6\u8f85\u52a9\u5230\u8f6f\u4ef6\u5b9a\u4e49\u7684\u6df1\u523b\u53d8\u9769\u3002\u5f53Kubernetes\u96c6\u7fa4\u6bcf\u5929\u8c03\u5ea6\u7740\u767e\u4e07\u7ea7\u5bb9\u5668\u3001\u8fb9\u7f18\u8ba1\u7b97\u8282\u70b9\u9700\u8981\u6beb\u79d2\u7ea7\u54cd\u5e94\u65f6\uff0c\u4f20\u7edf\u865a\u62df\u5316\u67b6\u6784\u7684\u76d1\u63a7\u76f2\u533a\u3001\u6027\u80fd\u635f\u8017\u548c\u5b89\u5168\u77ed\u677f\u6108\u53d1\u51f8\u663e\u3002\u8fd9\u573a\u6280\u672f\u9769\u547d\u7684\u8f6c\u6298\u70b9\u4e0a\uff0ceBPF<\/a>\uff08\u6269\u5c55\u578b\u4f2f\u514b\u5229\u5305\u8fc7\u6ee4\u5668\uff09\u5982\u540c\u4e00\u628a\u745e\u58eb\u519b\u5200\uff0c\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u865a\u62df\u5316\u6280\u672f\u7684\u53ef\u80fd\u6027\u8fb9\u754c<\/strong>\u3002<\/p>\n

\u4e00\u3001\u5185\u6838\u53ef\u7f16\u7a0b\u6027\u7a81\u7834\u865a\u62df\u5316\u6027\u80fd\u74f6\u9888<\/strong><\/h3>\n

\u4f20\u7edf\u865a\u62df\u5316\u6280\u672f\u4f9d\u8d56Hypervisor\u5c42\u8fdb\u884c\u8d44\u6e90\u8c03\u5ea6\uff0c\u8fd9\u79cd”\u4e2d\u95f4\u5546”\u67b6\u6784\u4e0d\u53ef\u907f\u514d\u5730\u5e26\u6765\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u3002VMware ESXi\u7684\u6d4b\u8bd5\u6570\u636e\u663e\u793a\uff0c\u5355\u4e2avCPU\u5728\u5bc6\u96c6I\/O\u573a\u666f\u4e0b\u53ef\u80fd\u4ea7\u751f\u9ad8\u8fbe30%\u7684\u6027\u80fd\u635f\u8017\u3002\u800ceBPF<\/a>\u901a\u8fc7\u5728\u5185\u6838\u7a7a\u95f4\u76f4\u63a5\u8fd0\u884c\u9a8c\u8bc1\u8fc7\u7684\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4e86\u865a\u62df\u5316\u76d1\u63a7\u4e0e\u4f18\u5316\u7684”\u96f6\u62f7\u8d1d”\u8def\u5f84<\/strong>\u3002<\/p>\n

\u5728KubeVirt\u7b49\u5bb9\u5668\u5316\u865a\u62df\u673a\u65b9\u6848\u4e2d\uff0c\u5f00\u53d1\u8005\u5229\u7528eBPF\u7684tc\uff08\u6d41\u91cf\u63a7\u5236\uff09\u5b50\u7cfb\u7edf\u91cd\u6784\u7f51\u7edc\u6808\u3002\u901a\u8fc7\u5c06OVS\uff08Open vSwitch\uff09\u7684\u6570\u636e\u5e73\u9762\u66ff\u6362\u4e3aeBPF\u7a0b\u5e8f\uff0cGoogle Cloud\u56e2\u961f\u6210\u529f\u5c06\u865a\u62df\u673a\u7684\u7f51\u7edc\u5ef6\u8fdf\u4ece85\u03bcs\u964d\u81f323\u03bcs\u3002\u8fd9\u79cd\u57fa\u4e8eeBPF\u7684\u8f7b\u91cf\u5316\u7f51\u7edc\u67b6\u6784<\/strong>\uff0c\u4f7f\u5f97\u5355\u8282\u70b9\u53ef\u627f\u8f7d\u7684\u865a\u62df\u673a\u5bc6\u5ea6\u63d0\u534740%\u4ee5\u4e0a\u3002<\/p>\n

\u66f4\u503c\u5f97\u5173\u6ce8\u7684\u662feBPF\u5728\u5b58\u50a8\u52a0\u901f\u4e2d\u7684\u521b\u65b0\u5e94\u7528\u3002\u5f53Ceph\u5206\u5e03\u5f0f\u5b58\u50a8\u906d\u9047\u865a\u62df\u673a\u7a81\u53d1IO\u8bf7\u6c42\u65f6\uff0ceBPF\u7684XDP\uff08\u5feb\u901f\u6570\u636e\u8def\u5f84\uff09\u6280\u672f\u53ef\u76f4\u63a5\u5728\u7f51\u7edc\u9a71\u52a8\u5c42\u8fc7\u6ee4\u5197\u4f59\u6570\u636e\u5305\u3002Red Hat\u7684\u6d4b\u8bd5\u6848\u4f8b\u8868\u660e\uff0c\u8fd9\u79cd\u9884\u5904\u7406\u673a\u5236\u4f7f\u5b58\u50a8\u96c6\u7fa4\u7684\u541e\u5410\u91cf\u5cf0\u503c\u8fbe\u523023GB\/s\uff0c\u8f83\u4f20\u7edf\u65b9\u6848\u63d0\u53472.7\u500d\u3002<\/p>\n

\u4e8c\u3001\u7ec6\u7c92\u5ea6\u5b89\u5168\u76d1\u63a7\u91cd\u6784\u865a\u62df\u5316\u9632\u62a4\u4f53\u7cfb<\/strong><\/h3>\n

\u865a\u62df\u5316\u73af\u5883\u7684\u591a\u79df\u6237\u7279\u6027\u4f7f\u5176\u6210\u4e3a\u653b\u51fb\u8005\u7684\u91cd\u70b9\u76ee\u6807\u3002\u4f20\u7edf\u5b89\u5168\u65b9\u6848\u4f9d\u8d56Guest OS\u5185\u7684\u4ee3\u7406\u7a0b\u5e8f\uff0c\u8fd9\u79cd”\u4e8b\u540e\u68c0\u6d4b”\u6a21\u5f0f\u5b58\u5728\u660e\u663e\u76d1\u63a7\u76f2\u533a\u3002eBPF\u7684\u5b89\u5168\u80fd\u529b\u521b\u65b0\u5728\u4e8e\u5b9e\u73b0\u4e86\u4ece\u786c\u4ef6\u5c42\u5230\u5e94\u7528\u5c42\u7684\u5168\u6808\u89c2\u6d4b<\/strong>\u3002<\/p>\n

\u501f\u52a9eBPF\u7684kprobe\u548ctracepoint\u6302\u94a9\u70b9\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u96f6\u4fe1\u4efb\u5b89\u5168\u6a21\u578b<\/strong>\u3002\u4f8b\u5982\u5728Firecracker\u5fae\u865a\u62df\u673a\u4e2d\uff0ceBPF\u7a0b\u5e8f\u5b9e\u65f6\u76d1\u63a7\u6bcf\u4e2aVM\u7684syscall\u8c03\u7528\u6a21\u5f0f\u3002\u5f53\u68c0\u6d4b\u5230\u975e\u5e38\u89c4\u7684fork()\u8c03\u7528\u94fe\u65f6\uff0c\u80fd\u572820ms\u5185\u89e6\u53d1\u5b89\u5168\u6c99\u7bb1\u9694\u79bb\u673a\u5236\u3002\u8fd9\u79cd\u57fa\u4e8e\u884c\u4e3a\u5206\u6790\u7684\u9632\u62a4\u65b9\u5f0f\uff0c\u4f7fAWS Lambda\u5e73\u53f0\u6210\u529f\u963b\u65ad97%\u7684\u96f6\u65e5\u653b\u51fb\u3002<\/p>\n

\u5728\u673a\u5bc6\u8ba1\u7b97\u9886\u57df\uff0ceBPF\u4e0eIntel SGX\u7684\u7ed3\u5408\u6253\u5f00\u4e86\u65b0\u7ef4\u5ea6\u3002\u901a\u8fc7\u5728enclave\u5185\u5916\u90e8\u7f72\u534f\u540c\u5de5\u4f5c\u7684eBPF\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4e86\u5185\u5b58\u52a0\u5bc6\u72b6\u6001\u7684\u52a8\u6001\u9a8c\u8bc1\u3002\u5fae\u8f6fAzure\u7684\u5b9e\u65bd\u65b9\u6848\u663e\u793a\uff0c\u8fd9\u79cd\u67b6\u6784\u4e0d\u4ec5\u4fdd\u8bc1\u654f\u611f\u6570\u636e\u5904\u7406\u7684\u5b89\u5168\u6027\uff0c\u8fd8\u5c06TEE\uff08\u53ef\u4fe1\u6267\u884c\u73af\u5883\uff09\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u63a7\u5236\u57285%\u4ee5\u5185\u3002<\/p>\n

\u4e09\u3001\u52a8\u6001\u53ef\u89c2\u6d4b\u6027\u63d0\u5347\u865a\u62df\u5316\u8fd0\u7ef4\u6548\u7387<\/strong><\/h3>\n

Gartner\u62a5\u544a\u6307\u51fa\uff0c\u8d85\u8fc760%\u7684\u4e91\u539f\u751f\u6545\u969c\u6e90\u4e8e\u865a\u62df\u5316\u5c42\u7684\u53ef\u89c1\u6027\u4e0d\u8db3\u3002eBPF\u7684\u521b\u65b0\u4e4b\u5904\u5728\u4e8e\u6253\u7834\u4e86\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u7684\u8d44\u6e90\u9694\u79bb\u58c1\u5792\u3002\u901a\u8fc7\u7edf\u4e00\u7684BPF Map\u6570\u636e\u7ed3\u6784\uff0c\u8fd0\u7ef4\u4eba\u5458\u53ef\u4ee5\u8de8\u865a\u62df\u673a\u3001\u5bb9\u5668\u548c\u7269\u7406\u8282\u70b9\u6784\u5efa\u5168\u666f\u76d1\u63a7\u89c6\u56fe<\/strong>\u3002<\/p>\n

\u5728OpenStack\u96c6\u7fa4\u4e2d\uff0c\u57fa\u4e8eeBPF\u7684\u6df1\u5ea6\u5305\u68c0\u6d4b\u6280\u672f\u6b63\u5728\u6539\u5199\u6d41\u91cf\u5206\u6790\u7684\u6e38\u620f\u89c4\u5219\u3002\u4e0d\u540c\u4e8e\u4f20\u7edf\u65b9\u6848\u9700\u8981\u955c\u50cf\u4ea4\u6362\u673a\u6d41\u91cf\uff0ceBPF\u7a0b\u5e8f\u53ef\u76f4\u63a5\u5728\u5185\u6838\u5c42\u63d0\u53d6\u865a\u62df\u673a\u7f51\u5361\u7684\u5143\u6570\u636e\u3002\u67d0\u91d1\u878d\u4e91\u5e73\u53f0\u7684\u5b9e\u8df5\u8868\u660e\uff0c\u8fd9\u79cd\u65b9\u6848\u4f7f\u7f51\u7edc\u6545\u969c\u5b9a\u4f4d\u65f6\u95f4\u4ece\u5c0f\u65f6\u7ea7\u7f29\u77ed\u81f3\u5206\u949f\u7ea7\uff0c\u540c\u65f6\u8282\u770175%\u7684\u76d1\u63a7\u5b58\u50a8\u6210\u672c\u3002<\/p>\n

\u9488\u5bf9GPU\u865a\u62df\u5316\u573a\u666f\uff0cNVIDIA\u4e0eeBPF\u793e\u533a\u5408\u4f5c\u5f00\u53d1\u4e86cuBPF\u6846\u67b6\u3002\u8be5\u65b9\u6848\u80fd\u5728\u786c\u4ef6\u8c03\u5ea6\u5668\u5c42\u9762\u91c7\u96c6GPU\u5229\u7528\u7387\u3001\u663e\u5b58\u788e\u7247\u7b4920+\u7ef4\u5ea6\u6307\u6807\u3002\u5f53\u68c0\u6d4b\u5230vGPU\u8d44\u6e90\u4e89\u7528\u65f6\uff0c\u81ea\u52a8\u89e6\u53d1\u52a8\u6001\u8fc1\u79fb\u673a\u5236\u3002\u6d4b\u8bd5\u6570\u636e\u663e\u793a\uff0c\u8fd9\u79cd\u9884\u6d4b\u6027\u8fd0\u7ef4\u4f7fAI\u8bad\u7ec3\u4efb\u52a1\u7684\u5b8c\u6210\u65f6\u95f4\u6ce2\u52a8\u7387\u964d\u4f4e68%\u3002<\/p>\n

\u56db\u3001\u8de8\u5c42\u534f\u540c\u52a0\u901f\u865a\u62df\u5316\u67b6\u6784\u6f14\u8fdb<\/strong><\/h3>\n

eBPF\u6700\u9769\u547d\u6027\u7684\u521b\u65b0\u5728\u4e8e\u6253\u7834\u4e86\u865a\u62df\u5316\u6280\u672f\u7684\u5c42\u7ea7\u58c1\u5792\u3002\u901a\u8fc7BPF Type Format (BTF) \u63d0\u4f9b\u7684\u7edf\u4e00\u6570\u636e\u7c7b\u578b\u63cf\u8ff0\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u8de8Hypervisor\u3001Guest OS\u548c\u5e94\u7528\u5c42\u7684\u534f\u540c\u7cfb\u7edf\u3002<\/p>\n

\u5728Kata Containers\u7684\u5b89\u5168\u5bb9\u5668\u67b6\u6784\u4e2d\uff0ceBPF\u7a0b\u5e8f\u540c\u65f6\u76d1\u63a7\u5bbf\u4e3b\u673acgroup\u548c\u865a\u62df\u673a\u7684\u8fdb\u7a0b\u6811\u3002\u5f53\u68c0\u6d4b\u5230\u5bb9\u5668\u9003\u9038\u5c1d\u8bd5\u65f6\uff0c\u65e2\u80fd\u963b\u6b62\u975e\u6cd5\u7cfb\u7edf\u8c03\u7528\uff0c\u53c8\u53ef\u540c\u6b65\u66f4\u65b0\u865a\u62df\u8bbe\u5907\u7684\u5b89\u5168\u7b56\u7565\u3002\u8fd9\u79cd\u7acb\u4f53\u5316\u9632\u5fa1\u4f53\u7cfb<\/strong>\u4f7f\u5bb9\u5668\u9003\u9038\u653b\u51fb\u7684\u6210\u529f\u7387\u4ece0.8%\u964d\u81f30.02%\u3002<\/p>\n

\u8fb9\u7f18\u8ba1\u7b97\u573a\u666f\u5219\u5c55\u73b0\u51fa\u66f4\u5927\u7684\u60f3\u8c61\u7a7a\u95f4\u3002\u817e\u8baf\u4e91\u57fa\u4e8eeBPF\u91cd\u6784\u7684Serverless\u5e73\u53f0\uff0c\u5b9e\u73b0\u4e86\u865a\u62df\u673a\u3001\u5bb9\u5668\u548c\u88f8\u91d1\u5c5e\u8d44\u6e90\u7684\u7edf\u4e00\u8c03\u5ea6\u3002\u5f53\u8fb9\u7f18\u8282\u70b9\u9700\u8981\u5feb\u901f\u6269\u7f29\u5bb9\u65f6\uff0ceBPF\u7a0b\u5e8f\u80fd\u52a8\u6001\u8c03\u6574\u865a\u62df\u5316\u5c42\u7684\u8d44\u6e90\u914d\u989d\uff0c\u4f7f\u51b7\u542f\u52a8\u65f6\u95f4\u7a33\u5b9a\u5728200ms\u4ee5\u5185\u3002\u8fd9\u79cd\u5f39\u6027\u80fd\u529b\u652f\u6491\u7740\u65e5\u5747\u767e\u4ebf\u6b21\u7684\u7269\u8054\u7f51\u8bbe\u5907\u8fde\u63a5\u3002<\/p>\n

\u4e94\u3001\u865a\u62df\u5316\u6280\u672f\u6808\u7684\u8f7b\u91cf\u5316\u9769\u547d<\/strong><\/h3>\n

\u4f20\u7edf\u865a\u62df\u5316\u65b9\u6848\u5f80\u5f80\u4f34\u968f\u7740\u590d\u6742\u7684\u8f6f\u4ef6\u6808\uff0c\u800ceBPF\u6b63\u5728\u63a8\u52a8\u67b6\u6784\u7684\u6781\u81f4\u7b80\u5316\u3002Google\u7684gVisor\u56e2\u961f\u5229\u7528eBPF\u91cd\u5199\u7cfb\u7edf\u8c03\u7528\u8fc7\u6ee4\u5c42\uff0c\u5c06\u5b89\u5168\u5bb9\u5668\u7684\u542f\u52a8\u5185\u5b58\u4ece64MB\u538b\u7f29\u523018MB\u3002\u8fd9\u79cd\u5fae\u578b\u5316\u865a\u62df\u5316\u8fd0\u884c\u65f6<\/strong>\u7279\u522b\u9002\u5408\u51fd\u6570\u8ba1\u7b97\u573a\u666f\uff0c\u4f7f\u963f\u91cc\u4e91FC\u5e73\u53f0\u7684\u8d44\u6e90\u5229\u7528\u7387\u63d0\u5347\u81f392%\u3002<\/p>\n

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