\u6839\u56e0\u5206\u6790<\/a><\/strong><\/h4>\n\u5f53\u6570\u636e\u5e93\u670d\u52a1\u7684\u67e5\u8be2\u5ef6\u8fdf\u7a81\u589e\u65f6\uff0ceBPF\u53ef\u4ee5\u540c\u65f6\u8ffd\u8e2a\u5185\u6838\u8c03\u5ea6\u5668\u3001\u6587\u4ef6I\/O\u548c\u7f51\u7edc\u6808\u7684\u72b6\u6001\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u5206\u6790read<\/code>\u7cfb\u7edf\u8c03\u7528\u7684\u8017\u65f6\u5206\u5e03\uff0c\u5feb\u901f\u5b9a\u4f4d\u662f\u7531\u78c1\u76d8\u74f6\u9888\u8fd8\u662f\u9501\u7ade\u4e89\u5bfc\u81f4\u2014\u2014\u8fd9\u79cd\u8de8\u5c42\u5173\u8054\u5206\u6790<\/strong>\u7684\u80fd\u529b\uff0c\u662f\u4f20\u7edf\u5de5\u5177\u96be\u4ee5\u5b9e\u73b0\u7684\u3002<\/p>\n
\n\u4e94\u3001\u6311\u6218\u4e0e\u672a\u6765\u65b9\u5411<\/strong><\/h3>\n\u5c3d\u7ba1eBPF\u663e\u8457\u63d0\u5347\u4e86\u5f02\u5e38\u68c0\u6d4b\u7684\u6548\u7387\uff0c\u5176\u6280\u672f\u8fb9\u754c\u4ecd\u9700\u8fdb\u4e00\u6b65\u63a2\u7d22\u3002\u4f8b\u5982\uff0ceBPF\u7a0b\u5e8f\u7684\u5185\u6838\u9a8c\u8bc1\u5668\u5bf9\u5faa\u73af\u548c\u590d\u6742\u903b\u8f91\u7684\u9650\u5236\uff0c\u4f7f\u5f97\u67d0\u4e9b\u573a\u666f\u4ecd\u9700\u4f9d\u8d56\u7528\u6237\u6001\u540e\u5904\u7406\uff1b\u6b64\u5916\uff0c\u8de8\u5185\u6838\u7248\u672c\u7684\u517c\u5bb9\u6027\u95ee\u9898\u4e5f\u9700\u8981\u66f4\u5b8c\u5584\u7684\u62bd\u8c61\u5c42\u89e3\u51b3\u3002<\/p>\n
\u672a\u6765\u7684eBPF\u751f\u6001\u53ef\u80fd\u671d\u7740\u4ee5\u4e0b\u65b9\u5411\u6f14\u8fdb\uff1a<\/p>\n
\n- \u6807\u51c6\u5316\u68c0\u6d4b\u6846\u67b6<\/strong>\uff1a\u5982\u7edf\u4e00\u7684\u4e8b\u4ef6Schema\u548c\u7b56\u7565\u8bed\u8a00\uff0c\u964d\u4f4e\u5f00\u53d1\u95e8\u69db\uff1b\n<\/li>\n
- \u786c\u4ef6\u52a0\u901f<\/strong>\uff1a\u501f\u52a9SmartNIC\u6216DPU\u5378\u8f7deBPF\u7a0b\u5e8f\uff0c\u8fdb\u4e00\u6b65\u91ca\u653eCPU\u8d44\u6e90\uff1b\n<\/li>\n
- AI\u9a71\u52a8\u5206\u6790<\/strong>\uff1a\u5c06eBPF\u7684\u5b9e\u65f6\u6570\u636e\u6d41\u4e0e\u673a\u5668\u5b66\u4e60\u6a21\u578b\u7ed3\u5408\uff0c\u5b9e\u73b0\u81ea\u9002\u5e94\u9608\u503c\u8c03\u6574\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
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Filter\uff09\u51ed\u501f\u5176\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u6027\u548c\u8fd1\u4e4e\u96f6\u5f00\u9500\u7684\u7279\u6027\uff0c\u6b63\u5728\u6210\u4e3a\u6784\u5efa\u9ad8\u6548\u5f02\u5e38\u68c0\u6d4b\u7cfb\u7edf\u7684\u6838\u5fc3\u6280\u672f\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF\u5982\u4f55\u7a81\u7834\u4f20\u7edf\u65b9\u6848\u7684\u74f6\u9888\uff0c\u5728\u5b89\u5168\u76d1\u63a7\u3001\u6027\u80fd\u5206\u6790\u7b49\u9886\u57df\u5b9e\u73b0\u7cbe\u51c6\u4e14\u9ad8\u6548\u7684\u5f02\u5e38\u53d1\u73b0\u3002 \u4e00\u3001eBPF\uff1a\u91cd\u65b0\u5b9a\u4e49\u5185\u6838\u89c2\u6d4b\u80fd\u529b eBPF\u6700\u521d\u8bbe\u8ba1\u7528\u4e8e\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\uff0c\u4f46\u7ecf\u8fc7\u591a\u5e74\u8fed\u4ee3\uff0c\u5df2\u53d1\u5c55\u4e3a\u4e00\u79cd\u901a\u7528\u7684\u5185\u6838\u865a\u62df\u5316\u6280\u672f\u3002\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u4e0d\u4fee\u6539\u5185\u6838\u6e90\u7801\u6216\u52a0\u8f7d\u5185\u6838\u6a21\u5757\u7684\u524d\u63d0\u4e0b\uff0c\u5c06\u81ea\u5b9a\u4e49\u7a0b\u5e8f\u6ce8\u5165\u5185\u6838\uff0c\u76f4\u63a5\u5728\u5185\u6838\u7a7a\u95f4\u5bf9\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u6d41\u91cf\u3001\u51fd\u6570\u8c03\u7528\u7b49\u4e8b\u4ef6\u8fdb\u884c\u5b9e\u65f6\u5904\u7406\u3002\u8fd9\u79cd\u80fd\u529b\u6253\u7834\u4e86\u4f20\u7edf\u89c2\u6d4b\u5de5\u5177\uff08\u5982strace\u6216tcpdump\uff09\u4f9d\u8d56\u8f6e\u8be2\u6216\u65e5\u5fd7\u5206\u6790\u7684\u88ab\u52a8\u6a21\u5f0f\uff0c\u8f6c\u800c\u901a\u8fc7\u4e8b\u4ef6\u9a71\u52a8\u7684\u673a\u5236\u4e3b\u52a8\u6355\u83b7\u5173\u952e\u884c\u4e3a\u3002 \u4e00\u4e2a\u5178\u578b\u7684eBPF\u7a0b\u5e8f\u53ef\u4ee5\u6302\u94a9\u5230sys_execve\u7cfb\u7edf\u8c03\u7528\uff0c\u5b9e\u65f6\u76d1\u63a7\u8fdb\u7a0b\u7684\u542f\u52a8\u884c\u4e3a\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u65e5\u5fd7\u6587\u4ef6\u5199\u5165\u6216\u5b9a\u671f\u626b\u63cf\u8fdb\u7a0b\u5217\u8868\u3002\u8fd9\u79cd\u4f4e\u5ef6\u8fdf\u54cd\u5e94\u7684\u7279\u6027\uff0c\u4f7f\u5f97\u5f02\u5e38\u68c0\u6d4b\u7684\u65f6\u6548\u6027\u4ece\u201c\u5206\u949f\u7ea7\u201d\u538b\u7f29\u5230\u201c\u6beb\u79d2\u7ea7\u201d\u3002 \u4e8c\u3001\u4f20\u7edf\u5f02\u5e38\u68c0\u6d4b\u7684\u75db\u70b9\u4e0eeBPF\u7684\u7a81\u7834 1. \u6027\u80fd\u5f00\u9500\u7684\u56f0\u5883 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\u901a\u8fc7\u5728\u5185\u6838\u4e2d\u76f4\u63a5\u8fd0\u884c\u8fc7\u6ee4\u903b\u8f91\uff0ceBPF\u907f\u514d\u4e86\u6570\u636e\u4ece\u5185\u6838\u5230\u7528\u6237\u6001\u7684\u65e0\u610f\u4e49\u590d\u5236\u3002\u4f8b\u5982\uff0c\u5229\u7528BPF_PROG_TYPE_SOCKET_FILTER\u7c7b\u578b\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u4ec5\u63d0\u53d6\u7b26\u5408\u7279\u5b9a\u7279\u5f81\u7684\u7f51\u7edc\u5305\uff08\u5982\u5f02\u5e38\u534f\u8bae\u5934\uff09\uff0c\u800c\u5c0690%\u7684\u6b63\u5e38\u6d41\u91cf\u76f4\u63a5\u4e22\u5f03\u3002\u8fd9\u79cd\u201c\u5185\u6838\u5185\u9884\u5904\u7406\u201d\u673a\u5236\uff0c\u80fd\u5c06\u7cfb\u7edf\u6574\u4f53\u5f00\u9500\u63a7\u5236\u57282%\u4ee5\u5185\u3002 2. \u5b9e\u65f6\u6027\u4e0e\u8986\u76d6\u8303\u56f4\u7684\u77db\u76fe \u91c7\u6837\u5206\u6790\uff08Sampling\uff09\u662f\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u964d\u4f4e\u5f00\u9500\u7684\u5e38\u89c1\u624b\u6bb5\uff0c\u4f46\u8fd9\u79cd\u65b9\u5f0f\u53ef\u80fd\u6f0f\u6389\u5173\u952e\u77ac\u65f6\u4e8b\u4ef6\uff08\u5982\u77ed\u65f6\u7206\u53d1\u7684CPU\u6bdb\u523a\u6216\u6beb\u79d2\u7ea7\u7f51\u7edc\u5ef6\u8fdf\uff09\u3002\u800c\u5168\u91cf\u76d1\u63a7\u53c8\u9762\u4e34\u5b58\u50a8\u4e0e\u8ba1\u7b97\u8d44\u6e90\u7684\u53cc\u91cd\u538b\u529b\u3002 eBPF\u7684\u4f18\u5316\u8def\u5f84\uff1a eBPF\u7a0b\u5e8f\u652f\u6301\u52a8\u6001\u52a0\u8f7d\u4e0e\u5378\u8f7d\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u573a\u666f\u7075\u6d3b\u9009\u62e9\u76d1\u63a7\u7c92\u5ea6\u3002\u4f8b\u5982\uff0c\u5728\u5b89\u5168\u573a\u666f\u4e2d\uff0c\u53ef\u4ee5\u4ec5\u5bf9\u654f\u611f\u7cfb\u7edf\u8c03\u7528\uff08\u5982\u6587\u4ef6\u8bfb\u5199\u3001\u7f51\u7edc\u8fde\u63a5\uff09\u8fdb\u884c\u5168\u91cf\u8ddf\u8e2a\uff1b\u800c\u5728\u6027\u80fd\u5206\u6790\u4e2d\uff0c\u5219\u53ef\u57fa\u4e8e\u9608\u503c\u89e6\u53d1\u8be6\u7ec6\u91c7\u6837\uff08\u5982\u5f53CPU\u4f7f\u7528\u7387\u8d85\u8fc780%\u65f6\u542f\u52a8\u5806\u6808\u5206\u6790\uff09\u3002\u8fd9\u79cd\u6309\u9700\u89e6\u53d1\u7684\u667a\u80fd\u89c2\u6d4b\uff0c\u517c\u987e\u4e86\u5b9e\u65f6\u6027\u4e0e\u8d44\u6e90\u6548\u7387\u3002 \u4e09\u3001eBPF\u5b9e\u73b0\u9ad8\u6548\u5f02\u5e38\u68c0\u6d4b\u7684\u6838\u5fc3\u673a\u5236 1. \u57fa\u4e8e\u201c\u76f4\u65b9\u56fe\u201d\u4e0e\u201c\u9891\u7387\u7edf\u8ba1\u201d\u7684\u8f7b\u91cf\u5206\u6790 eBPF\u5185\u7f6e\u7684BPF_MAP_TYPE_HASH\u548cBPF_MAP_TYPE_HISTOGRAM\u6570\u636e\u7ed3\u6784\uff0c\u5141\u8bb8\u5728\u5185\u6838\u4e2d\u76f4\u63a5\u805a\u5408\u6570\u636e\u3002\u4f8b\u5982\uff0c\u7edf\u8ba1\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u7cfb\u7edf\u8c03\u7528\u6b21\u6570\uff0c\u5f53\u67d0\u4e00\u8fdb\u7a0b\u7684\u8c03\u7528\u9891\u7387\u8d85\u8fc7\u9884\u8bbe\u9608\u503c\u65f6\uff0c\u7acb\u5373\u89e6\u53d1\u544a\u8b66\u3002\u8fd9\u79cd\u65b9\u5f0f\u907f\u514d\u4e86\u5411\u7528\u6237\u6001\u4f20\u9012\u6d77\u91cf\u539f\u59cb\u6570\u636e\uff0c\u51cf\u5c1199%\u7684\u6570\u636e\u4f20\u8f93\u91cf\u3002 2. \u5b89\u5168\u4e8b\u4ef6\u7684\u65e0\u635f\u5173\u8054 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