{"id":36252,"date":"2025-03-26T14:35:16","date_gmt":"2025-03-26T06:35:16","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=36252"},"modified":"2025-03-26T14:35:16","modified_gmt":"2025-03-26T06:35:16","slug":"ebpf%e5%af%b9%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%80%a7%e8%83%bd%e8%b0%83%e4%bc%98%e7%9a%84%e5%85%b7%e4%bd%93%e6%96%b9%e6%b3%95%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/36252.html","title":{"rendered":"eBPF\u5bf9\u670d\u52a1\u5668\u6027\u80fd\u8c03\u4f18\u7684\u5177\u4f53\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2025\/03\/51lscIK.jpg\" alt=\"eBPF\u5bf9\u670d\u52a1\u5668\u6027\u80fd\u8c03\u4f18\u7684\u5177\u4f53\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f\" ><\/p>\n<\/p>\n<hr>\n<p>\u5728\u5f53\u4eca\u4e91\u8ba1\u7b97\u4e0e\u5fae\u670d\u52a1\u67b6\u6784\u76db\u884c\u7684\u65f6\u4ee3\uff0c\u670d\u52a1\u5668\u6027\u80fd\u8c03\u4f18\u5df2\u6210\u4e3a\u4fdd\u969c\u7cfb\u7edf\u7a33\u5b9a\u6027\u7684\u6838\u5fc3\u6311\u6218\u3002\u4f20\u7edf\u5de5\u5177\u5982<code>top<\/code>\u3001<code>vmstat<\/code>\u6216<code>perf<\/code>\u867d\u80fd\u63d0\u4f9b\u57fa\u7840\u6307\u6807\uff0c\u5374\u96be\u4ee5\u5728<strong>\u6beb\u79d2\u7ea7\u5ef6\u8fdf\u8ffd\u8e2a<\/strong>\u6216<strong>\u6d77\u91cf\u5e76\u53d1\u8bf7\u6c42<\/strong>\u7684\u573a\u666f\u4e2d\u7cbe\u51c6\u5b9a\u4f4d\u74f6\u9888\u3002\u6b64\u65f6\uff0c<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\u51ed\u501f\u5176<strong>\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u80fd\u529b<\/strong>\u548c<strong>\u96f6\u4fb5\u5165\u5f0f\u89c2\u6d4b\u7279\u6027<\/strong>\uff0c\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u6027\u80fd\u8c03\u4f18\u7684\u8fb9\u754c\u2014\u2014\u5b83\u50cf\u4e00\u53f0\u201c\u6570\u5b57\u663e\u5fae\u955c\u201d\uff0c\u8ba9\u5f00\u53d1\u8005\u65e0\u9700\u91cd\u542f\u670d\u52a1\u6216\u4fee\u6539\u4ee3\u7801\uff0c\u5373\u53ef\u5728\u8fd0\u884c\u65f6\u900f\u89c6\u7cfb\u7edf\u6700\u6df1\u5c42\u7684\u8fd0\u4f5c\u903b\u8f91\u3002<\/p>\n<hr>\n<h3 id=\"\u4e00-\u4e3a\u4ec0\u4e48ebpf\u662f\u6027\u80fd\u8c03\u4f18\u7684-\u6e38\u620f\u89c4\u5219\u6539\u53d8\u8005\">\u4e00\u3001\u4e3a\u4ec0\u4e48<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\u662f\u6027\u80fd\u8c03\u4f18\u7684\u201c\u6e38\u620f\u89c4\u5219\u6539\u53d8\u8005\u201d\uff1f<\/h3>\n<p>\u4f20\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u5f80\u5f80\u9762\u4e34\u4e09\u5927\u56f0\u5883\uff1a<strong>\u6570\u636e\u91c7\u96c6\u7c92\u5ea6\u7c97<\/strong>\u3001<strong>\u89c2\u6d4b\u5f00\u9500\u9ad8<\/strong>\uff0c\u4ee5\u53ca<strong>\u52a8\u6001\u8c03\u6574\u80fd\u529b\u5f31<\/strong>\u3002\u4f8b\u5982\uff0c\u5f53\u67d0\u4e2aJava\u5e94\u7528\u51fa\u73b0\u5076\u53d1\u6027GC\u505c\u987f\u5bfc\u81f4API\u5ef6\u8fdf\u98d9\u5347\u65f6\uff0c\u5e38\u89c4\u65b9\u6cd5\u53ef\u80fd\u9700\u8981\u53cd\u590d\u542f\u505c\u8fdb\u7a0b\u5e76\u9644\u52a0\u8c03\u8bd5\u5668\uff0c\u800c<strong>eBPF\u901a\u8fc7\u52a8\u6001\u6ce8\u5165\u63a2\u9488<\/strong>\uff0c\u53ef\u76f4\u63a5\u5728\u5185\u6838\u6001\u6355\u83b7\u4ece\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u5305\u5904\u7406\u5230\u5185\u5b58\u5206\u914d\u7684\u5b8c\u6574\u4e8b\u4ef6\u94fe\u3002<\/p>\n<p>\u636eLinux\u5185\u6838\u7ef4\u62a4\u8005Brendan Gregg\u7684\u6d4b\u8bd5\uff0ceBPF\u7a0b\u5e8f\u7684\u5904\u7406\u5ef6\u8fdf\u901a\u5e38\u4f4e\u4e8e<strong>1\u5fae\u79d2<\/strong>\uff0cCPU\u5360\u7528\u7387\u63a7\u5236\u5728<strong>1%\u4ee5\u5185<\/strong>\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5373\u4fbf\u662f\u5728\u6bcf\u79d2\u5904\u7406\u767e\u4e07\u7ea7\u8bf7\u6c42\u7684\u7535\u5546\u7cfb\u7edf\u4e2d\uff0c\u5de5\u7a0b\u5e08\u4e5f\u80fd\u5b9e\u65f6\u7ed8\u5236\u51fa<strong>\u8d44\u6e90\u6d88\u8017\u70ed\u70b9\u56fe<\/strong>\uff0c\u800c\u65e0\u9700\u62c5\u5fe7\u5de5\u5177\u672c\u8eab\u6210\u4e3a\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<hr>\n<h3 id=\"\u4e8c-ebpf\u6027\u80fd\u8c03\u4f18\u7684\u56db\u5927\u5b9e\u6218\u573a\u666f\">\u4e8c\u3001eBPF\u6027\u80fd\u8c03\u4f18\u7684\u56db\u5927\u5b9e\u6218\u573a\u666f<\/h3>\n<h4 id=\"1-\u7cbe\u7ec6\u5316\u8d44\u6e90\u76d1\u63a7-\u4ece-\u5b8f\u89c2\u7edf\u8ba1-\u5230-\u5fae\u89c2\u8ffd\u8e2a\">1. <strong>\u7cbe\u7ec6\u5316\u8d44\u6e90\u76d1\u63a7\uff1a\u4ece\u201c\u5b8f\u89c2\u7edf\u8ba1\u201d\u5230\u201c\u5fae\u89c2\u8ffd\u8e2a\u201d<\/strong><\/h4>\n<p>eBPF\u5141\u8bb8\u5f00\u53d1\u8005\u81ea\u5b9a\u4e49\u6307\u6807\u91c7\u96c6\u903b\u8f91\u3002\u901a\u8fc7\u7f16\u5199<code>BPF_PROG_TYPE_TRACEPOINT<\/code>\u7c7b\u578b\u7684\u7a0b\u5e8f\uff0c\u53ef\u7cbe\u51c6\u6355\u83b7\u4ee5\u4e0b\u6570\u636e\uff1a<\/p>\n<ul>\n<li><strong>CPU\u8c03\u5ea6\u5ef6\u8fdf<\/strong>\uff1a\u8ddf\u8e2a\u8fdb\u7a0b\u4ece\u5c31\u7eea\u961f\u5217\u5230\u5b9e\u9645\u83b7\u5f97CPU\u6267\u884c\u7684\u65f6\u95f4\u5dee\uff0c\u5b9a\u4f4d\u7531\u4e0a\u4e0b\u6587\u5207\u6362\u6216\u4f18\u5148\u7ea7\u53cd\u8f6c\u5f15\u53d1\u7684\u6027\u80fd\u8870\u51cf\n<\/li>\n<li><strong>\u5185\u5b58\u9875\u9519\u8bef\u9891\u7387<\/strong>\uff1a\u7edf\u8ba1major\/minor page fault\u6b21\u6570\uff0c\u8bc6\u522b\u5185\u5b58\u6cc4\u6f0f\u6216NUMA\u8282\u70b9\u5206\u914d\u4e0d\u5747\u95ee\u9898\n<\/li>\n<li><strong>\u5757\u8bbe\u5907I\/O\u6a21\u5f0f<\/strong>\uff1a\u5206\u6790\u78c1\u76d8\u8bf7\u6c42\u7684\u961f\u5217\u6df1\u5ea6\u3001\u8bfb\u5199\u6bd4\u4f8b\uff0c\u4f18\u5316RAID\u7b56\u7565\u6216\u6587\u4ef6\u7cfb\u7edf\u5bf9\u9f50\u53c2\u6570\n<\/li>\n<\/ul>\n<p>Netflix\u56e2\u961f\u66fe\u5229\u7528<a href=\"https:\/\/netflixtechblog.com\" target=\"_blank\">eBPF\u7a0b\u5e8f\u76d1\u63a7EXT4\u6587\u4ef6\u7cfb\u7edf\u7684<code>ext4_da_write_begin<\/code>\u51fd\u6570<\/a>\uff0c\u53d1\u73b0\u65e5\u5fd7\u5199\u5165\u6a21\u5f0f\u4e0eSSD\u64e6\u9664\u5468\u671f\u51b2\u7a81\uff0c\u6700\u7ec8\u901a\u8fc7\u8c03\u6574\u65e5\u5fd7\u63d0\u4ea4\u95f4\u9694\u5c06\u78c1\u76d8\u541e\u5410\u91cf\u63d0\u534740%\u3002<\/p>\n<h4 id=\"2-\u7f51\u7edc\u6808\u6027\u80fd\u5256\u6790-\u6253\u7834-\u9ed1\u76d2-\u4f20\u8f93\u74f6\u9888\">2. <strong>\u7f51\u7edc\u6808\u6027\u80fd\u5256\u6790\uff1a\u6253\u7834\u201c\u9ed1\u76d2\u201d\u4f20\u8f93\u74f6\u9888<\/strong><\/h4>\n<p>\u4f20\u7edf\u7f51\u7edc\u76d1\u63a7\u5de5\u5177\uff08\u5982tcpdump\uff09\u56e0\u9700\u8981\u590d\u5236\u6570\u636e\u5305\u5230\u7528\u6237\u6001\uff0c\u96be\u4ee5\u5728\u9ad8\u541e\u5410\u573a\u666f\u6301\u7eed\u8fd0\u884c\u3002\u800ceBPF\u7684<code>XDP\uff08eXpress Data Path\uff09<\/code>\u6846\u67b6\u5141\u8bb8\u5728\u7f51\u7edc\u9a71\u52a8\u5c42\u76f4\u63a5\u5904\u7406\u6570\u636e\u5305\uff0c\u5b9e\u73b0\uff1a<\/p>\n<ul>\n<li><strong>\u534f\u8bae\u6808\u65c1\u8def<\/strong>\uff1a\u5c06Redis\u6216MySQL\u7684\u54cd\u5e94\u5305\u7ed5\u8fc7\u5185\u6838TCP\/IP\u6808\uff0c\u76f4\u63a5\u7531XDP\u7a0b\u5e8f\u8f6c\u53d1\uff0c\u964d\u4f4e\u5ef6\u8fdf\u81f3<strong>\u5fae\u79d2\u7ea7<\/strong>\n<\/li>\n<li><strong>\u8d1f\u8f7d\u5747\u8861\u4f18\u5316<\/strong>\uff1a\u57fa\u4e8eeBPF\u7684Maglev\u7b97\u6cd5\u5b9e\u73b0\u4e00\u81f4\u6027\u54c8\u5e0c\uff0c\u907f\u514dKubernetes\u96c6\u7fa4\u4e2d\u56e0Pod\u6269\u7f29\u5bb9\u5f15\u53d1\u7684\u8fde\u63a5\u91cd\u7f6e\n<\/li>\n<li><strong>\u6d41\u91cf\u67d3\u8272\u4e0e\u9650\u6d41<\/strong>\uff1a\u5bf9\u7279\u5b9aHTTP\u8def\u5f84\u6216gRPC\u65b9\u6cd5\u5b9e\u65bd\u52a8\u6001\u901f\u7387\u9650\u5236\uff0c\u9632\u6b62\u7a81\u53d1\u6d41\u91cf\u51fb\u7a7f\u670d\u52a1\u7194\u65ad\u673a\u5236\n<\/li>\n<\/ul>\n<p>Cloudflare\u7684DDoS\u9632\u5fa1\u7cfb\u7edf\u6b63\u662f\u57fa\u4e8eXDP\uff0c\u5728\u5355\u4e2a\u670d\u52a1\u5668\u4e0a\u5b9e\u73b0\u4e86<strong>\u767e\u4e07\u7ea7QPS<\/strong>\u7684\u8fc7\u6ee4\u80fd\u529b\u3002<\/p>\n<h4 id=\"3-\u5e94\u7528\u8fd0\u884c\u65f6\u8bca\u65ad-\u7a7f\u900f\u8bed\u8a00\u865a\u62df\u673a\u7684-\u8ff7\u96fe\">3. <strong>\u5e94\u7528\u8fd0\u884c\u65f6\u8bca\u65ad\uff1a\u7a7f\u900f\u8bed\u8a00\u865a\u62df\u673a\u7684\u201c\u8ff7\u96fe\u201d<\/strong><\/h4>\n<p>\u5bf9\u4e8eJVM\u3001Python\u7b49\u5e26\u6709GC\u6216\u89e3\u91ca\u5668\u5c42\u7684\u5e94\u7528\uff0ceBPF\u80fd\u7ed5\u8fc7\u8bed\u8a00\u81ea\u8eab\u7684\u76d1\u63a7\u5c40\u9650\uff1a<\/p>\n<ul>\n<li><strong>Java\u65b9\u6cd5\u7ea7\u706b\u7130\u56fe<\/strong>\uff1a\u901a\u8fc7USDT\uff08User Statically-Defined Tracing\uff09\u63a2\u9488\u6ce8\u5165\uff0c\u8ffd\u8e2aHotSpot JVM\u7684\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u8fc7\u7a0b\uff0c\u5b9a\u4f4dGC\u505c\u987f\u6216\u9501\u7ade\u4e89\n<\/li>\n<li><strong>Python GIL\u4e89\u7528\u5206\u6790<\/strong>\uff1a\u6302\u94a9<code>PyEval_EvalFrameEx<\/code>\u51fd\u6570\uff0c\u7edf\u8ba1\u5168\u5c40\u89e3\u91ca\u5668\u9501\u7684\u6301\u6709\u65f6\u95f4\uff0c\u6307\u5bfc\u534f\u7a0b\u8c03\u5ea6\u7b56\u7565\u4f18\u5316\n<\/li>\n<li><strong>HTTP\/gRPC<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">\u5168\u94fe\u8def\u8ffd\u8e2a<\/a><\/strong>\uff1a\u5728Netty\u6216Envoy\u4e2d\u6ce8\u5165BPF\u7a0b\u5e8f\uff0c\u81ea\u52a8\u5173\u8054\u8de8\u670d\u52a1\u7684\u8bf7\u6c42ID\uff0c\u6784\u5efa\u7aef\u5230\u7aef\u7684\u5ef6\u8fdf\u5206\u5e03\u76f4\u65b9\u56fe\n<\/li>\n<\/ul>\n<p>Datadog\u7684APM\u4ea7\u54c1\u5df2\u91c7\u7528eBPF\u5b9e\u73b0<strong>\u65e0\u63d2\u6869\u7684<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">\u5206\u5e03\u5f0f\u8ffd\u8e2a<\/a><\/strong>\uff0c\u4f7f\u76d1\u63a7\u6570\u636e\u91c7\u96c6\u5f00\u9500\u964d\u4f4e\u81f3\u4f20\u7edf\u65b9\u6848\u76841\/10\u3002<\/p>\n<h4 id=\"4-\u5b89\u5168\u4e0e\u6027\u80fd\u7684\u534f\u540c\u4f18\u5316\">4. <strong>\u5b89\u5168\u4e0e\u6027\u80fd\u7684\u534f\u540c\u4f18\u5316<\/strong><\/h4>\n<p>eBPF\u7684\u9a8c\u8bc1\u5668\uff08Verifier\uff09\u786e\u4fdd\u7a0b\u5e8f\u7684\u5b89\u5168\u6027\uff0c\u4f7f\u5f97\u6027\u80fd\u8c03\u4f18\u53ef\u4e0e\u5b9e\u65f6\u9632\u5fa1\u7ed3\u5408\uff1a<\/p>\n<ul>\n<li><strong>\u7cfb\u7edf\u8c03\u7528\u8fc7\u6ee4<\/strong>\uff1a\u963b\u6b62\u5f02\u5e38\u9891\u7387\u7684<code>open()<\/code>\u6216<code>execve()<\/code>\u8c03\u7528\uff0c\u540c\u65f6\u8bb0\u5f55\u653b\u51fb\u8def\u5f84\u7684\u6027\u80fd\u5f71\u54cd\n<\/li>\n<li><strong>\u5185\u5b58\u8bbf\u95ee\u6a21\u5f0f\u5206\u6790<\/strong>\uff1a\u68c0\u6d4b\u56e0Spectre\u6f0f\u6d1e\u7f13\u89e3\u63aa\u65bd\u5bfc\u81f4\u7684TLB\u5237\u65b0\u5f00\u9500\uff0c\u52a8\u6001\u8c03\u6574\u9875\u8868\u9694\u79bb\u7b56\u7565\n<\/li>\n<li><strong>\u5bb9\u5668\u9003\u9038\u9632\u5fa1<\/strong>\uff1a\u5728cgroup\u5c42\u7ea7\u62e6\u622a\u975e\u6cd5namespace\u64cd\u4f5c\uff0c\u907f\u514d\u8d44\u6e90\u9694\u79bb\u5931\u6548\u5f15\u53d1\u7684\u6027\u80fd\u6296\u52a8\n<\/li>\n<\/ul>\n<p>Google\u7684gVisor\u5bb9\u5668\u8fd0\u884c\u65f6\u96c6\u6210\u4e86eBPF\uff0c\u5728\u589e\u5f3a\u5b89\u5168\u6027\u7684\u540c\u65f6\uff0c\u5c06\u7cfb\u7edf\u8c03\u7528\u4ee3\u7406\u7684\u5f00\u9500\u964d\u4f4e\u4e8660%\u3002<\/p>\n<hr>\n<h3 id=\"\u4e09-\u6784\u5efaebpf\u8c03\u4f18\u5de5\u4f5c\u6d41\u7684\u4e09\u4e2a\u5173\u952e\u6b65\u9aa4\">\u4e09\u3001\u6784\u5efaeBPF\u8c03\u4f18\u5de5\u4f5c\u6d41\u7684\u4e09\u4e2a\u5173\u952e\u6b65\u9aa4<\/h3>\n<h4 id=\"1-\u76ee\u6807\u5b9a\u4e49\u4e0e\u6570\u636e\u91c7\u96c6\u89c4\u5212\">1. <strong>\u76ee\u6807\u5b9a\u4e49\u4e0e\u6570\u636e\u91c7\u96c6\u89c4\u5212<\/strong><\/h4>\n<ul>\n<li>\u660e\u786e\u8c03\u4f18\u6307\u6807\uff1a\u662f\u964d\u4f4eP99\u5ef6\u8fdf\u3001\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u8fd8\u662f\u51cf\u5c11CPU\u5229\u7528\u7387\uff1f\n<\/li>\n<li>\u9009\u62e9\u89c2\u6d4b\u70b9\uff1a\u5185\u6838\u51fd\u6570\uff08kprobe\uff09\u3001\u7528\u6237\u6001\u51fd\u6570\uff08uprobe\uff09\u3001\u8ddf\u8e2a\u70b9\uff08tracepoint\uff09\u6216\u6027\u80fd\u4e8b\u4ef6\uff08perf_event\uff09\n<\/li>\n<li>\u8bbe\u8ba1\u6570\u636e\u805a\u5408\u7b56\u7565\uff1a\u4f7f\u7528<code>BPF_MAP_TYPE_HASH<\/code>\u5b58\u50a8\u76f4\u65b9\u56fe\uff0c\u6216<code>BPF_MAP_TYPE_RINGBUF<\/code>\u8f93\u51fa\u4e8b\u4ef6\u6d41\n<\/li>\n<\/ul>\n<h4 id=\"2-\u5f00\u53d1\u4e0e\u9a8c\u8bc1ebpf\u7a0b\u5e8f\">2. <strong>\u5f00\u53d1\u4e0e\u9a8c\u8bc1eBPF\u7a0b\u5e8f<\/strong><\/h4>\n<ul>\n<li>\u4f7f\u7528BCC\uff08BPF Compiler Collection\uff09\u6216libbpf\u6846\u67b6\u7f16\u5199\u7a0b\u5e8f\n<\/li>\n<li>\u901a\u8fc7<code>bpftool<\/code>\u68c0\u67e5\u7a0b\u5e8f\u7684\u5408\u6cd5\u6027\uff0c\u786e\u4fdd\u65e0\u5185\u5b58\u8d8a\u754c\u6216\u6b7b\u5faa\u73af\n<\/li>\n<li>\u5728\u6d4b\u8bd5\u73af\u5883\u4e2d\u6ce8\u5165\u8d1f\u8f7d\uff0c\u9a8c\u8bc1\u6570\u636e\u51c6\u786e\u6027\uff08\u5982\u5bf9\u6bd4<code>\/proc\/net\/dev<\/code>\u4e0eeBPF\u91c7\u96c6\u7684\u7f51\u7edc\u6d41\u91cf\uff09\n<\/li>\n<\/ul>\n<h4 id=\"3-\u751f\u4ea7\u73af\u5883\u90e8\u7f72\u4e0e\u53cd\u9988\u5faa\u73af\">3. <strong>\u751f\u4ea7\u73af\u5883\u90e8\u7f72\u4e0e\u53cd\u9988\u5faa\u73af<\/strong><\/h4>\n<ul>\n<li>\u9009\u62e9\u4f4e\u6743\u9650\u6a21\u5f0f\uff1a\u5229\u7528CAP_BPF\u80fd\u529b\u9650\u5236\u7a0b\u5e8f\u4f5c\u7528\u57df\n<\/li>\n<li>\u8bbe\u7f6e\u7194\u65ad\u673a\u5236\uff1a\u5f53CPU\u6216\u5185\u5b58\u6d88\u8017\u8d85\u8fc7\u9608\u503c\u65f6\u81ea\u52a8\u5378\u8f7dBPF\u7a0b\u5e8f\n<\/li>\n<li>\u96c6\u6210\u5230CI\/CD\u6d41\u6c34\u7ebf\uff1a\u5c06\u6027\u80fd\u57fa\u7ebf\u4e0eeBPF\u6307\u6807\u5173\u8054\uff0c\u5b9e\u73b0\u201c\u89c2\u6d4b\u5373\u4ee3\u7801\u201d\n<\/li>\n<\/ul>\n<hr>\n<h3 id=\"\u56db-\u907f\u5f00ebpf\u6027\u80fd\u8c03\u4f18\u7684-\u6df1\u5751\">\u56db\u3001\u907f\u5f00eBPF\u6027\u80fd\u8c03\u4f18\u7684\u201c\u6df1\u5751\u201d<\/h3>\n<p>\u5c3d\u7ba1eBPF\u6f5c\u529b\u5de8\u5927\uff0c\u4f46\u4e0d\u5f53\u4f7f\u7528\u53ef\u80fd\u9002\u5f97\u5176\u53cd\uff1a<\/p>\n<ul>\n<li><strong>\u907f\u514d\u5728\u5185\u6838\u70ed\u8def\u5f84\u4e0a\u8fc7\u5ea6\u63d2\u6869<\/strong>\uff1a\u4f8b\u5982\uff0c\u5728<code>netif_receive_skb<\/code>\u8fd9\u6837\u7684\u9ad8\u9891\u51fd\u6570\u4e2d\u6267\u884c\u590d\u6742\u903b\u8f91\uff0c\u53ef\u80fd\u5f15\u53d1\u8f6f\u4e2d\u65ad\u98ce\u66b4\n<\/li>\n<li><strong>\u8c28\u614e\u5904\u7406\u5185\u5b58\u6620\u5c04<\/strong>\uff1aeBPF\u6808\u7a7a\u95f4\u4ec5512\u5b57\u8282\uff0c\u5927\u7ed3\u6784\u4f53\u5e94\u901a\u8fc7<code>bpf_map<\/code>\u5b58\u50a8\n<\/li>\n<li><strong>\u7248\u672c\u517c\u5bb9\u6027\u68c0\u67e5<\/strong>\uff1a\u4e0d\u540c\u5185\u6838\u7248\u672c\u5bf9BPF\u7279\u6027\u7684\u652f\u6301\u5dee\u5f02\u8f83\u5927\uff0c\u9700\u7528<code>uname -r<\/code>\u548c<code>bpftool feature probe<\/code>\u9884\u5148\u68c0\u6d4b\n<\/li>\n<\/ul>\n<p>\u77e5\u540d\u5f00\u6e90\u9879\u76eeFalco\u66fe\u56e0\u672a\u6b63\u786e\u5904\u7406eBPF\u9a8c\u8bc1\u5668\u89c4\u5219\uff0c\u5bfc\u81f4\u5728RHEL 8.4\u4e0a\u5f15\u53d1\u5185\u6838\u6050\u614c\uff08Panic\uff09\u3002\u56e0\u6b64\uff0c<strong>\u6e10\u8fdb\u5f0f\u7070\u5ea6\u53d1\u5e03<\/strong>\u4e0e<strong>\u8be6\u5c3d\u7248\u672c\u6d4b\u8bd5<\/strong>\u4e0d\u53ef\u6216\u7f3a\u3002<\/p>\n<hr>\n<h3 id=\"\u4e94-\u672a\u6765\u5c55\u671b-ebpf\u4e0eaiops\u7684\u5316\u5b66\u53cd\u5e94\">\u4e94\u3001\u672a\u6765\u5c55\u671b\uff1aeBPF\u4e0eAIOps\u7684\u5316\u5b66\u53cd\u5e94<\/h3>\n<p>\u968f\u7740\u53ef\u89c2\u6d4b\u6027\u6570\u636e\u7684\u7206\u70b8\u5f0f\u589e\u957f\uff0ceBPF\u6b63\u6210\u4e3aAI\u9a71\u52a8\u6027\u80fd\u4f18\u5316\u7684\u57fa\u77f3\u3002\u901a\u8fc7\u5c06eBPF\u91c7\u96c6\u7684<strong>\u591a\u7ef4\u65f6\u95f4\u5e8f\u5217\u6570\u636e<\/strong>\u8f93\u5165\u65f6\u5e8f\u9884\u6d4b\u6a21\u578b\uff08\u5982LSTM\u6216Transformer\uff09\uff0c\u53ef\u5b9e\u73b0\uff1a<\/p>\n<ul>\n<li>**<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u5f53\u4eca\u4e91\u8ba1\u7b97\u4e0e\u5fae\u670d\u52a1\u67b6\u6784\u76db\u884c\u7684\u65f6\u4ee3\uff0c\u670d\u52a1\u5668\u6027\u80fd\u8c03\u4f18\u5df2\u6210\u4e3a\u4fdd\u969c\u7cfb\u7edf\u7a33\u5b9a\u6027\u7684\u6838\u5fc3\u6311\u6218\u3002\u4f20\u7edf\u5de5\u5177\u5982top\u3001vmstat\u6216perf\u867d\u80fd\u63d0\u4f9b\u57fa\u7840\u6307\u6807\uff0c\u5374\u96be\u4ee5\u5728\u6beb\u79d2\u7ea7\u5ef6\u8fdf\u8ffd\u8e2a\u6216\u6d77\u91cf\u5e76\u53d1\u8bf7\u6c42\u7684\u573a\u666f\u4e2d\u7cbe\u51c6\u5b9a\u4f4d\u74f6\u9888\u3002\u6b64\u65f6\uff0ceBPF\uff08Extended Berkeley Packet Filter\uff09\u51ed\u501f\u5176\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u80fd\u529b\u548c\u96f6\u4fb5\u5165\u5f0f\u89c2\u6d4b\u7279\u6027\uff0c\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u6027\u80fd\u8c03\u4f18\u7684\u8fb9\u754c\u2014\u2014\u5b83\u50cf\u4e00\u53f0\u201c\u6570\u5b57\u663e\u5fae\u955c\u201d\uff0c\u8ba9\u5f00\u53d1\u8005\u65e0\u9700\u91cd\u542f\u670d\u52a1\u6216\u4fee\u6539\u4ee3\u7801\uff0c\u5373\u53ef\u5728\u8fd0\u884c\u65f6\u900f\u89c6\u7cfb\u7edf\u6700\u6df1\u5c42\u7684\u8fd0\u4f5c\u903b\u8f91\u3002 \u4e00\u3001\u4e3a\u4ec0\u4e48eBPF\u662f\u6027\u80fd\u8c03\u4f18\u7684\u201c\u6e38\u620f\u89c4\u5219\u6539\u53d8\u8005\u201d\uff1f \u4f20\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u5f80\u5f80\u9762\u4e34\u4e09\u5927\u56f0\u5883\uff1a\u6570\u636e\u91c7\u96c6\u7c92\u5ea6\u7c97\u3001\u89c2\u6d4b\u5f00\u9500\u9ad8\uff0c\u4ee5\u53ca\u52a8\u6001\u8c03\u6574\u80fd\u529b\u5f31\u3002\u4f8b\u5982\uff0c\u5f53\u67d0\u4e2aJava\u5e94\u7528\u51fa\u73b0\u5076\u53d1\u6027GC\u505c\u987f\u5bfc\u81f4API\u5ef6\u8fdf\u98d9\u5347\u65f6\uff0c\u5e38\u89c4\u65b9\u6cd5\u53ef\u80fd\u9700\u8981\u53cd\u590d\u542f\u505c\u8fdb\u7a0b\u5e76\u9644\u52a0\u8c03\u8bd5\u5668\uff0c\u800ceBPF\u901a\u8fc7\u52a8\u6001\u6ce8\u5165\u63a2\u9488\uff0c\u53ef\u76f4\u63a5\u5728\u5185\u6838\u6001\u6355\u83b7\u4ece\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u5305\u5904\u7406\u5230\u5185\u5b58\u5206\u914d\u7684\u5b8c\u6574\u4e8b\u4ef6\u94fe\u3002 \u636eLinux\u5185\u6838\u7ef4\u62a4\u8005Brendan Gregg\u7684\u6d4b\u8bd5\uff0ceBPF\u7a0b\u5e8f\u7684\u5904\u7406\u5ef6\u8fdf\u901a\u5e38\u4f4e\u4e8e1\u5fae\u79d2\uff0cCPU\u5360\u7528\u7387\u63a7\u5236\u57281%\u4ee5\u5185\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5373\u4fbf\u662f\u5728\u6bcf\u79d2\u5904\u7406\u767e\u4e07\u7ea7\u8bf7\u6c42\u7684\u7535\u5546\u7cfb\u7edf\u4e2d\uff0c\u5de5\u7a0b\u5e08\u4e5f\u80fd\u5b9e\u65f6\u7ed8\u5236\u51fa\u8d44\u6e90\u6d88\u8017\u70ed\u70b9\u56fe\uff0c\u800c\u65e0\u9700\u62c5\u5fe7\u5de5\u5177\u672c\u8eab\u6210\u4e3a\u6027\u80fd\u74f6\u9888\u3002 \u4e8c\u3001eBPF\u6027\u80fd\u8c03\u4f18\u7684\u56db\u5927\u5b9e\u6218\u573a\u666f 1. \u7cbe\u7ec6\u5316\u8d44\u6e90\u76d1\u63a7\uff1a\u4ece\u201c\u5b8f\u89c2\u7edf\u8ba1\u201d\u5230\u201c\u5fae\u89c2\u8ffd\u8e2a\u201d eBPF\u5141\u8bb8\u5f00\u53d1\u8005\u81ea\u5b9a\u4e49\u6307\u6807\u91c7\u96c6\u903b\u8f91\u3002\u901a\u8fc7\u7f16\u5199BPF_PROG_TYPE_TRACEPOINT\u7c7b\u578b\u7684\u7a0b\u5e8f\uff0c\u53ef\u7cbe\u51c6\u6355\u83b7\u4ee5\u4e0b\u6570\u636e\uff1a CPU\u8c03\u5ea6\u5ef6\u8fdf\uff1a\u8ddf\u8e2a\u8fdb\u7a0b\u4ece\u5c31\u7eea\u961f\u5217\u5230\u5b9e\u9645\u83b7\u5f97CPU\u6267\u884c\u7684\u65f6\u95f4\u5dee\uff0c\u5b9a\u4f4d\u7531\u4e0a\u4e0b\u6587\u5207\u6362\u6216\u4f18\u5148\u7ea7\u53cd\u8f6c\u5f15\u53d1\u7684\u6027\u80fd\u8870\u51cf \u5185\u5b58\u9875\u9519\u8bef\u9891\u7387\uff1a\u7edf\u8ba1major\/minor page fault\u6b21\u6570\uff0c\u8bc6\u522b\u5185\u5b58\u6cc4\u6f0f\u6216NUMA\u8282\u70b9\u5206\u914d\u4e0d\u5747\u95ee\u9898 \u5757\u8bbe\u5907I\/O\u6a21\u5f0f\uff1a\u5206\u6790\u78c1\u76d8\u8bf7\u6c42\u7684\u961f\u5217\u6df1\u5ea6\u3001\u8bfb\u5199\u6bd4\u4f8b\uff0c\u4f18\u5316RAID\u7b56\u7565\u6216\u6587\u4ef6\u7cfb\u7edf\u5bf9\u9f50\u53c2\u6570 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