{"id":37041,"date":"2025-04-18T10:40:30","date_gmt":"2025-04-18T02:40:30","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=37041"},"modified":"2025-04-18T10:40:30","modified_gmt":"2025-04-18T02:40:30","slug":"ebpf%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e8%b7%a8%e8%8a%82%e7%82%b9%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f%e7%b3%bb%e7%bb%9f%e7%9b%91%e6%8e%a7%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/37041.html","title":{"rendered":"eBPF\u5982\u4f55\u5b9e\u73b0\u8de8\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u76d1\u63a7\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2025\/04\/bU60s.jpg\" alt=\"eBPF\u5982\u4f55\u5b9e\u73b0\u8de8\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u76d1\u63a7\uff1f\" ><\/p>\n<\/p>\n<hr>\n<p><strong>\u5f53\u5fae\u670d\u52a1\u4e0e\u4e91\u539f\u751f\u67b6\u6784\u6210\u4e3a\u6570\u5b57\u5316\u8f6c\u578b\u7684\u6807\u914d\uff0c\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u590d\u6742\u6027\u6b63\u4ee5\u6307\u6570\u7ea7\u901f\u5ea6\u6500\u5347\u3002<\/strong> \u5de5\u7a0b\u5e08\u4eec\u4e0d\u5f97\u4e0d\u9762\u5bf9\u8fd9\u6837\u7684\u73b0\u5b9e\uff1a\u4e00\u4e2a\u7531\u6570\u767e\u4e2a\u5fae\u670d\u52a1\u7ec4\u6210\u7684\u7535\u5546\u5e73\u53f0\uff0c\u6bcf\u79d2\u5904\u7406\u6570\u5341\u4e07\u6b21\u8bf7\u6c42\u65f6\uff0c\u5982\u4f55\u7cbe\u51c6\u5b9a\u4f4d\u8de8\u8282\u70b9\u7684\u6027\u80fd\u74f6\u9888\uff1f\u5982\u4f55\u5728\u5bb9\u5668\u9891\u7e41\u542f\u505c\u7684\u573a\u666f\u4e0b\uff0c\u5b9e\u73b0\u65e0\u4fb5\u5165\u7684\u5168\u94fe\u8def\u8ffd\u8e2a\uff1f\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u5728\u52a8\u6001\u5316\u3001\u8f7b\u91cf\u5316\u3001\u7ec6\u7c92\u5ea6\u7b49\u7ef4\u5ea6\u9010\u6e10\u663e\u9732\u51fa\u529b\u4e0d\u4ece\u5fc3\u7684\u75b2\u6001\u3002\u800c<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\u6280\u672f\u7684\u5d1b\u8d77\uff0c\u4e3a\u8fd9\u4e00\u96be\u9898\u63d0\u4f9b\u4e86\u5168\u65b0\u7684\u89e3\u9898\u601d\u8def\u2014\u2014\u901a\u8fc7\u5185\u6838\u7ea7\u7684\u53ef\u7f16\u7a0b\u89c2\u6d4b\u80fd\u529b\uff0c\u6784\u5efa\u8de8\u8d8a\u8282\u70b9\u7684\u5168\u666f\u5f0f\u76d1\u63a7\u4f53\u7cfb\u3002<\/p>\n<hr>\n<h3 id=\"\u4e00-ebpf-\u4ece\u6570\u636e\u5305\u8fc7\u6ee4\u5230\u7cfb\u7edf\u89c2\u6d4b\u7684\u9769\u547d\">\u4e00\u3001<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff1a\u4ece\u6570\u636e\u5305\u8fc7\u6ee4\u5230\u7cfb\u7edf\u89c2\u6d4b\u7684\u9769\u547d<\/h3>\n<p>\u6700\u521d\u4f5c\u4e3a\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\u5de5\u5177\u8bde\u751f\u7684eBPF\uff0c\u5982\u4eca\u5df2\u6f14\u53d8\u4e3aLinux\u5185\u6838\u7684\u201c\u8d85\u7ea7\u4f20\u611f\u5668\u201d\u3002\u5176\u6838\u5fc3\u7a81\u7834\u5728\u4e8e<strong>\u5141\u8bb8\u7528\u6237\u5728\u4e0d\u4fee\u6539\u5185\u6838\u4ee3\u7801\u7684\u524d\u63d0\u4e0b\uff0c\u52a8\u6001\u6ce8\u5165\u5b89\u5168\u53ef\u63a7\u7684\u81ea\u5b9a\u4e49\u7a0b\u5e8f<\/strong>\u3002\u8fd9\u79cd\u80fd\u529b\u4f7f\u5f97eBPF\u80fd\u591f\u4ee5\u8fd1\u4e4e\u96f6\u5f00\u9500\u7684\u65b9\u5f0f\uff0c\u5b9e\u65f6\u6355\u83b7\u5185\u6838\u6001\u4e0e\u7528\u6237\u6001\u7684\u5404\u7c7b\u4e8b\u4ef6\u2014\u2014\u4ece\u7cfb\u7edf\u8c03\u7528\u3001\u51fd\u6570\u6267\u884c\u5230\u7f51\u7edc\u6d41\u91cf\uff0c\u518d\u5230\u6587\u4ef6\u8bfb\u5199\uff0c\u5f62\u6210<strong>\u8de8\u5c42\u7ea7\u3001\u8de8\u8fdb\u7a0b\u3001\u8de8\u8282\u70b9\u7684\u7edf\u4e00\u89c2\u6d4b\u5e73\u9762<\/strong>\u3002<\/p>\n<p>\u4e0e\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u76f8\u6bd4\uff0ceBPF\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u76d1\u63a7\u4e2d\u5c55\u73b0\u51fa\u4e09\u5927\u72ec\u7279\u4f18\u52bf\uff1a<\/p>\n<ol>\n<li><strong>\u96f6\u4fb5\u5165\u6027<\/strong>\uff1a\u65e0\u9700\u5728\u5e94\u7528\u5c42\u57cb\u70b9\u6216\u91cd\u542f\u670d\u52a1\uff0c\u907f\u514d\u4e86\u5bf9\u4e1a\u52a1\u903b\u8f91\u7684\u5e72\u6270\uff1b\n<\/li>\n<li><strong>\u5168\u94fe\u8def\u900f\u89c6<\/strong>\uff1a\u4ece\u5185\u6838\u534f\u8bae\u6808\u5230\u5bb9\u5668\u7f51\u7edc\uff0c\u5b8c\u6574\u8ffd\u8e2a\u8de8\u8282\u70b9\u8bf7\u6c42\u7684\u4f20\u64ad\u8def\u5f84\uff1b\n<\/li>\n<li><strong>\u52a8\u6001\u70ed\u52a0\u8f7d<\/strong>\uff1a\u89c4\u5219\u53ef\u5b9e\u65f6\u66f4\u65b0\uff0c\u5b8c\u7f8e\u9002\u914d\u4e91\u539f\u751f\u73af\u5883\u7684\u5f39\u6027\u6269\u7f29\u5bb9\u7279\u6027\u3002\n<\/li>\n<\/ol>\n<hr>\n<h3 id=\"\u4e8c-\u8de8\u8282\u70b9\u76d1\u63a7\u7684\u75db\u70b9\u4e0eebpf\u7834\u5c40\u4e4b\u9053\">\u4e8c\u3001\u8de8\u8282\u70b9\u76d1\u63a7\u7684\u75db\u70b9\u4e0eeBPF\u7834\u5c40\u4e4b\u9053<\/h3>\n<p>\u5728\u5206\u5e03\u5f0f\u67b6\u6784\u4e2d\uff0c\u76d1\u63a7\u6570\u636e\u7684\u788e\u7247\u5316\u95ee\u9898\u5c24\u4e3a\u7a81\u51fa\u3002\u4ee5\u5178\u578b\u7684Kubernetes\u96c6\u7fa4\u4e3a\u4f8b\uff0c\u4e00\u4e2a\u7528\u6237\u8bf7\u6c42\u53ef\u80fd\u9014\u7ecfIngress\u7f51\u5173\u3001Service Mesh\u8fb9\u8f66\u4ee3\u7406\u3001\u591a\u4e2a\u5fae\u670d\u52a1\u5b9e\u4f8b\u4ee5\u53ca\u6570\u636e\u5e93\u5206\u7247\uff0c\u6bcf\u4e2a\u73af\u8282\u6d89\u53ca\u4e0d\u540c\u8282\u70b9\u7684\u8d44\u6e90\u6d88\u8017\u4e0e\u7f51\u7edc\u4ea4\u4e92\u3002\u4f20\u7edf\u65b9\u6848\u5982\u65e5\u5fd7\u805a\u5408\uff08ELK Stack\uff09\u6216\u6307\u6807\u91c7\u96c6\uff08<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">Prometheus<\/a>\uff09\u5b58\u5728\u660e\u663e\u77ed\u677f\uff1a<\/p>\n<ul>\n<li><strong>\u65e5\u5fd7\u5173\u8054\u56f0\u96be<\/strong>\uff1a\u5206\u6563\u5728\u591a\u8282\u70b9\u7684\u65e5\u5fd7\u9700\u8981\u590d\u6742\u7684\u65f6\u95f4\u6233\u5bf9\u9f50\u4e0eTraceID\u7f1d\u5408\uff1b\n<\/li>\n<li><strong>\u6307\u6807\u7ef4\u5ea6\u5355\u4e00<\/strong>\uff1aCPU\/\u5185\u5b58\u7b49\u57fa\u7840\u6307\u6807\u65e0\u6cd5\u63ed\u793a\u8de8\u8282\u70b9\u8c03\u7528\u94fe\u7684\u5f02\u5e38\u6839\u56e0\uff1b\n<\/li>\n<li><strong>\u7f51\u7edc\u9ed1\u6d1e\u6548\u5e94<\/strong>\uff1a\u5bb9\u5668\u8986\u76d6\u7f51\u7edc\u4e2d\u7684\u4e22\u5305\u3001\u91cd\u4f20\u7b49\u5e95\u5c42\u884c\u4e3a\u96be\u4ee5\u53ef\u89c6\u5316\u3002\n<\/li>\n<\/ul>\n<p><strong>eBPF\u901a\u8fc7\u5728\u5185\u6838\u5c42\u9762\u5efa\u7acb\u7edf\u4e00\u7684\u89c2\u6d4b\u6846\u67b6\uff0c\u76f4\u51fb\u8fd9\u4e9b\u75db\u70b9<\/strong>\uff1a<\/p>\n<ul>\n<li><strong>\u8de8\u8282\u70b9\u6d41\u91cf\u62d3\u6251<\/strong>\uff1a\u5229\u7528<code>kprobe<\/code>\u548c<code>tracepoint<\/code>\u6302\u94a9\u7f51\u7edc\u534f\u8bae\u6808\uff0c\u81ea\u52a8\u7ed8\u5236\u670d\u52a1\u95f4\u901a\u4fe1\u5173\u7cfb\u56fe\uff1b\n<\/li>\n<li><strong>\u7cbe\u7ec6\u5316\u7684\u8bf7\u6c42\u8ffd\u8e2a<\/strong>\uff1a\u7ed3\u5408TCP\/UDP\u62a5\u6587\u89e3\u6790\uff0c\u7cbe\u786e\u7edf\u8ba1\u6bcf\u4e2a\u8de8\u8282\u70b9\u8c03\u7528\u7684\u5ef6\u8fdf\u3001\u91cd\u8bd5\u6b21\u6570\u53ca\u9519\u8bef\u7801\uff1b\n<\/li>\n<li><strong>\u8d44\u6e90\u6d88\u8017\u5173\u8054\u5206\u6790<\/strong>\uff1a\u5c06CPU\u8c03\u5ea6\u3001\u5185\u5b58\u5206\u914d\u7b49\u5185\u6838\u4e8b\u4ef6\u4e0e\u7279\u5b9a\u5bb9\u5668\/PID\u7ed1\u5b9a\uff0c\u5b9a\u4f4d\u8d44\u6e90\u4e89\u62a2\u5f15\u53d1\u7684\u7ea7\u8054\u6545\u969c\u3002\n<\/li>\n<\/ul>\n<hr>\n<h3 id=\"\u4e09-\u5b9e\u73b0\u8de8\u8282\u70b9\u76d1\u63a7\u7684ebpf\u6280\u672f\u8def\u5f84\">\u4e09\u3001\u5b9e\u73b0\u8de8\u8282\u70b9\u76d1\u63a7\u7684eBPF\u6280\u672f\u8def\u5f84<\/h3>\n<p>\u6784\u5efa\u57fa\u4e8eeBPF\u7684\u5206\u5e03\u5f0f\u76d1\u63a7\u7cfb\u7edf\uff0c\u9700\u8981\u6253\u901a<strong>\u6570\u636e\u91c7\u96c6\u3001\u4f20\u8f93\u3001\u5b58\u50a8\u3001\u5206\u6790<\/strong>\u7684\u5168\u94fe\u8def\u95ed\u73af\uff1a<\/p>\n<ol>\n<li><strong>\u5185\u6838\u4e8b\u4ef6\u91c7\u96c6<\/strong><br \/>\n\u901a\u8fc7\u7f16\u5199eBPF\u7a0b\u5e8f\uff0c\u6302\u94a9\u4ee5\u4e0b\u5173\u952e\u70b9\uff1a\n<\/li>\n<\/ol>\n<ul>\n<li><strong>\u7f51\u7edc\u5c42<\/strong>\uff1a<code>tc<\/code>\uff08\u6d41\u91cf\u63a7\u5236\uff09\u6302\u94a9\u70b9\u6355\u83b7\u8fdb\u51fa\u5bb9\u5668\u7684\u6240\u6709\u6570\u636e\u5305\uff1b\n<\/li>\n<li><strong>\u7cfb\u7edf\u8c03\u7528<\/strong>\uff1a<code>tracepoint\/syscalls<\/code>\u8ddf\u8e2a\u8de8\u8282\u70b9RPC\u7684\u8bfb\u5199\u64cd\u4f5c\uff1b\n<\/li>\n<li><strong>\u8c03\u5ea6\u5668<\/strong>\uff1a<code>sched_switch<\/code>\u4e8b\u4ef6\u5206\u6790CPU\u7b49\u5f85\u961f\u5217\u5bf9\u5ef6\u8fdf\u7684\u5f71\u54cd\u3002\n<\/li>\n<\/ul>\n<pre><code class=\"language-c\">\/\/ \u793a\u4f8b\uff1a\u8ffd\u8e2aTCP\u91cd\u4f20\u4e8b\u4ef6\u7684eBPF\u4ee3\u7801\u7247\u6bb5  \r\nSEC(&quot;tracepoint\/tcp\/tcp_retransmit_skb&quot;)  \r\nint handle_tcp_retransmit(struct trace_event_raw_tcp_event *ctx) {  \r\nu32 pid = bpf_get_current_pid_tgid() &gt;&gt; 32;  \r\nu32 saddr = ctx-&gt;saddr, daddr = ctx-&gt;daddr;  \r\nbpf_printk(&quot;PID %d retransmit from %x to %x&quot;, pid, saddr, daddr);  \r\nreturn 0;  \r\n}  \r\n<\/code><\/pre>\n<ol>\n<li><strong>\u4e0a\u4e0b\u6587\u5173\u8054\u4e0e\u6807\u7b7e\u6ce8\u5165<\/strong><br \/>\n\u5c06\u91c7\u96c6\u5230\u7684\u539f\u59cb\u4e8b\u4ef6\u4e0eKubernetes\u5143\u6570\u636e\uff08\u5982Pod\u540d\u79f0\u3001Service\u6807\u7b7e\uff09\u52a8\u6001\u5173\u8054\uff1a\n<\/li>\n<\/ol>\n<ul>\n<li>\u5229\u7528<code>bpf_get_ns_current_pid_tgid<\/code>\u83b7\u53d6\u5bb9\u5668\u7684cgroup\u4fe1\u606f\uff1b\n<\/li>\n<li>\u901a\u8fc7eBPF Map\u5b58\u50a8PID\u5230Pod ID\u7684\u6620\u5c04\u5173\u7cfb\uff1b\n<\/li>\n<li>\u81ea\u52a8\u9644\u52a0Envoy\/Istio\u7b49Service Mesh\u7ec4\u4ef6\u7684Trace\u4e0a\u4e0b\u6587\u3002\n<\/li>\n<\/ul>\n<ol>\n<li><strong>\u4f4e\u5f00\u9500\u6570\u636e\u4f20\u8f93<\/strong><br \/>\n\u91c7\u7528<strong>\u73af\u5f62\u7f13\u51b2\u533a\uff08Ring Buffer\uff09<\/strong>\u4e0e<strong>\u6279\u5904\u7406\u63a8\u9001<\/strong>\u673a\u5236\uff0c\u5c06\u4e8b\u4ef6\u6570\u636e\u4ece\u5185\u6838\u6001\u9ad8\u6548\u4f20\u9012\u81f3\u7528\u6237\u6001\u4ee3\u7406\uff0c\u907f\u514d\u9891\u7e41\u4e0a\u4e0b\u6587\u5207\u6362\u3002\u5b9e\u9a8c\u6570\u636e\u663e\u793a\uff0c\u5355\u8282\u70b9\u6bcf\u79d2\u5904\u740610\u4e07\u4e8b\u4ef6\u65f6\uff0cCPU\u5360\u7528\u7387\u53ef\u63a7\u5236\u57285%\u4ee5\u5185\u3002\n<\/li>\n<\/ol>\n<hr>\n<h3 id=\"\u56db-\u4ece\u7406\u8bba\u5230\u5b9e\u8df5-ebpf\u76d1\u63a7\u7684\u5178\u578b\u573a\u666f\">\u56db\u3001\u4ece\u7406\u8bba\u5230\u5b9e\u8df5\uff1aeBPF\u76d1\u63a7\u7684\u5178\u578b\u573a\u666f<\/h3>\n<h4 id=\"\u573a\u666f1-\u5fae\u670d\u52a1\u95f4\u5f02\u5e38\u7194\u65ad\u6839\u56e0\u5206\u6790\">\u573a\u666f1\uff1a\u5fae\u670d\u52a1\u95f4\u5f02\u5e38\u7194\u65ad<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">\u6839\u56e0\u5206\u6790<\/a><\/h4>\n<p>\u67d0\u91d1\u878d\u5e73\u53f0\u66fe\u906d\u9047\u8de8\u6570\u636e\u4e2d\u5fc3\u8c03\u7528\u5076\u53d1\u8d85\u65f6\u3002\u4f20\u7edfAPM\u5de5\u5177\u4ec5\u80fd\u5b9a\u4f4d\u5230\u8d85\u65f6\u53d1\u751f\u7684\u670d\u52a1\u8282\u70b9\uff0c\u800c<strong>eBPF\u901a\u8fc7\u5173\u8054TCP\u91cd\u4f20\u4e8b\u4ef6\u3001\u5bb9\u5668CPU\u914d\u989d\u9650\u5236\u53caKafka\u751f\u4ea7\u8005\u7f13\u51b2\u6c60\u72b6\u6001<\/strong>\uff0c\u6700\u7ec8\u53d1\u73b0\u662f\u8de8\u533a\u7f51\u7edc\u6296\u52a8\u89e6\u53d1\u5ba2\u6237\u7aef\u91cd\u8bd5\u98ce\u66b4\uff0c\u5bfc\u81f4\u670d\u52a1\u7aef\u7ebf\u7a0b\u6c60\u8017\u5c3d\u3002<\/p>\n<h4 id=\"\u573a\u666f2-\u4e91\u539f\u751f\u73af\u5883\u4e0b\u7684\u8d44\u6e90\u4e89\u62a2\u5b9a\u4f4d\">\u573a\u666f2\uff1a\u4e91\u539f\u751f\u73af\u5883\u4e0b\u7684\u8d44\u6e90\u4e89\u62a2\u5b9a\u4f4d<\/h4>\n<p>\u5728\u6df7\u90e8\u573a\u666f\uff08\u5728\u7ebf\u670d\u52a1\u4e0e\u79bb\u7ebf\u4efb\u52a1\u5171\u4eab\u96c6\u7fa4\uff09\u4e2d\uff0c\u67d0\u4e2aNode\u7684Java\u670d\u52a1\u9891\u7e41\u51fa\u73b0GC\u505c\u987f\u3002\u901a\u8fc7eBPF\u7684<code>mm_vmscan<\/code>\u5185\u5b58\u56de\u6536\u4e8b\u4ef6\u8ffd\u8e2a\uff0c\u7ed3\u5408cgroup\u5c42\u7ea7\u7edf\u8ba1\uff0c\u5feb\u901f\u9501\u5b9a\u662f\u540c\u8282\u70b9\u8fd0\u884c\u7684Spark\u4efb\u52a1\u89e6\u53d1\u5185\u5b58\u6ea2\u51fa\uff0c\u5f15\u53d1\u5185\u5b58\u9875\u5f3a\u5236\u56de\u6536\u3002<\/p>\n<hr>\n<h3 id=\"\u4e94-\u5f00\u6e90\u751f\u6001\u4e0e\u672a\u6765\u6f14\u8fdb\">\u4e94\u3001\u5f00\u6e90\u751f\u6001\u4e0e\u672a\u6765\u6f14\u8fdb<\/h3>\n<p>\u5f53\u524d\uff0c\u57fa\u4e8eeBPF\u7684\u76d1\u63a7\u5de5\u5177\u94fe\u5df2\u5f62\u6210\u5b8c\u6574\u751f\u6001\uff1a<\/p>\n<ul>\n<li><strong>Pixie<\/strong>\uff1a\u5b9e\u65f6Kubernetes\u8bca\u65ad\u5e73\u53f0\uff0c\u5185\u7f6eeBPF\u9a71\u52a8\u7684\u534f\u8bae\u89e3\u6790\u5668\uff1b\n<\/li>\n<li><strong>Falco<\/strong>\uff1a\u4e91\u539f\u751f\u8fd0\u884c\u65f6\u5b89\u5168\u5de5\u5177\uff0c\u68c0\u6d4b\u5f02\u5e38\u8de8\u8282\u70b9\u8fdb\u7a0b\u901a\u4fe1\uff1b\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u5fae\u670d\u52a1\u4e0e\u4e91\u539f\u751f\u67b6\u6784\u6210\u4e3a\u6570\u5b57\u5316\u8f6c\u578b\u7684\u6807\u914d\uff0c\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u590d\u6742\u6027\u6b63\u4ee5\u6307\u6570\u7ea7\u901f\u5ea6\u6500\u5347\u3002 \u5de5\u7a0b\u5e08\u4eec\u4e0d\u5f97\u4e0d\u9762\u5bf9\u8fd9\u6837\u7684\u73b0\u5b9e\uff1a\u4e00\u4e2a\u7531\u6570\u767e\u4e2a\u5fae\u670d\u52a1\u7ec4\u6210\u7684\u7535\u5546\u5e73\u53f0\uff0c\u6bcf\u79d2\u5904\u7406\u6570\u5341\u4e07\u6b21\u8bf7\u6c42\u65f6\uff0c\u5982\u4f55\u7cbe\u51c6\u5b9a\u4f4d\u8de8\u8282\u70b9\u7684\u6027\u80fd\u74f6\u9888\uff1f\u5982\u4f55\u5728\u5bb9\u5668\u9891\u7e41\u542f\u505c\u7684\u573a\u666f\u4e0b\uff0c\u5b9e\u73b0\u65e0\u4fb5\u5165\u7684\u5168\u94fe\u8def\u8ffd\u8e2a\uff1f\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u5728\u52a8\u6001\u5316\u3001\u8f7b\u91cf\u5316\u3001\u7ec6\u7c92\u5ea6\u7b49\u7ef4\u5ea6\u9010\u6e10\u663e\u9732\u51fa\u529b\u4e0d\u4ece\u5fc3\u7684\u75b2\u6001\u3002\u800ceBPF\uff08Extended Berkeley Packet Filter\uff09\u6280\u672f\u7684\u5d1b\u8d77\uff0c\u4e3a\u8fd9\u4e00\u96be\u9898\u63d0\u4f9b\u4e86\u5168\u65b0\u7684\u89e3\u9898\u601d\u8def\u2014\u2014\u901a\u8fc7\u5185\u6838\u7ea7\u7684\u53ef\u7f16\u7a0b\u89c2\u6d4b\u80fd\u529b\uff0c\u6784\u5efa\u8de8\u8d8a\u8282\u70b9\u7684\u5168\u666f\u5f0f\u76d1\u63a7\u4f53\u7cfb\u3002 \u4e00\u3001eBPF\uff1a\u4ece\u6570\u636e\u5305\u8fc7\u6ee4\u5230\u7cfb\u7edf\u89c2\u6d4b\u7684\u9769\u547d \u6700\u521d\u4f5c\u4e3a\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\u5de5\u5177\u8bde\u751f\u7684eBPF\uff0c\u5982\u4eca\u5df2\u6f14\u53d8\u4e3aLinux\u5185\u6838\u7684\u201c\u8d85\u7ea7\u4f20\u611f\u5668\u201d\u3002\u5176\u6838\u5fc3\u7a81\u7834\u5728\u4e8e\u5141\u8bb8\u7528\u6237\u5728\u4e0d\u4fee\u6539\u5185\u6838\u4ee3\u7801\u7684\u524d\u63d0\u4e0b\uff0c\u52a8\u6001\u6ce8\u5165\u5b89\u5168\u53ef\u63a7\u7684\u81ea\u5b9a\u4e49\u7a0b\u5e8f\u3002\u8fd9\u79cd\u80fd\u529b\u4f7f\u5f97eBPF\u80fd\u591f\u4ee5\u8fd1\u4e4e\u96f6\u5f00\u9500\u7684\u65b9\u5f0f\uff0c\u5b9e\u65f6\u6355\u83b7\u5185\u6838\u6001\u4e0e\u7528\u6237\u6001\u7684\u5404\u7c7b\u4e8b\u4ef6\u2014\u2014\u4ece\u7cfb\u7edf\u8c03\u7528\u3001\u51fd\u6570\u6267\u884c\u5230\u7f51\u7edc\u6d41\u91cf\uff0c\u518d\u5230\u6587\u4ef6\u8bfb\u5199\uff0c\u5f62\u6210\u8de8\u5c42\u7ea7\u3001\u8de8\u8fdb\u7a0b\u3001\u8de8\u8282\u70b9\u7684\u7edf\u4e00\u89c2\u6d4b\u5e73\u9762\u3002 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\u6307\u6807\u7ef4\u5ea6\u5355\u4e00\uff1aCPU\/\u5185\u5b58\u7b49\u57fa\u7840\u6307\u6807\u65e0\u6cd5\u63ed\u793a\u8de8\u8282\u70b9\u8c03\u7528\u94fe\u7684\u5f02\u5e38\u6839\u56e0\uff1b \u7f51\u7edc\u9ed1\u6d1e\u6548\u5e94\uff1a\u5bb9\u5668\u8986\u76d6\u7f51\u7edc\u4e2d\u7684\u4e22\u5305\u3001\u91cd\u4f20\u7b49\u5e95\u5c42\u884c\u4e3a\u96be\u4ee5\u53ef\u89c6\u5316\u3002 eBPF\u901a\u8fc7\u5728\u5185\u6838\u5c42\u9762\u5efa\u7acb\u7edf\u4e00\u7684\u89c2\u6d4b\u6846\u67b6\uff0c\u76f4\u51fb\u8fd9\u4e9b\u75db\u70b9\uff1a \u8de8\u8282\u70b9\u6d41\u91cf\u62d3\u6251\uff1a\u5229\u7528kprobe\u548ctracepoint\u6302\u94a9\u7f51\u7edc\u534f\u8bae\u6808\uff0c\u81ea\u52a8\u7ed8\u5236\u670d\u52a1\u95f4\u901a\u4fe1\u5173\u7cfb\u56fe\uff1b \u7cbe\u7ec6\u5316\u7684\u8bf7\u6c42\u8ffd\u8e2a\uff1a\u7ed3\u5408TCP\/UDP\u62a5\u6587\u89e3\u6790\uff0c\u7cbe\u786e\u7edf\u8ba1\u6bcf\u4e2a\u8de8\u8282\u70b9\u8c03\u7528\u7684\u5ef6\u8fdf\u3001\u91cd\u8bd5\u6b21\u6570\u53ca\u9519\u8bef\u7801\uff1b \u8d44\u6e90\u6d88\u8017\u5173\u8054\u5206\u6790\uff1a\u5c06CPU\u8c03\u5ea6\u3001\u5185\u5b58\u5206\u914d\u7b49\u5185\u6838\u4e8b\u4ef6\u4e0e\u7279\u5b9a\u5bb9\u5668\/PID\u7ed1\u5b9a\uff0c\u5b9a\u4f4d\u8d44\u6e90\u4e89\u62a2\u5f15\u53d1\u7684\u7ea7\u8054\u6545\u969c\u3002 \u4e09\u3001\u5b9e\u73b0\u8de8\u8282\u70b9\u76d1\u63a7\u7684eBPF\u6280\u672f\u8def\u5f84 \u6784\u5efa\u57fa\u4e8eeBPF\u7684\u5206\u5e03\u5f0f\u76d1\u63a7\u7cfb\u7edf\uff0c\u9700\u8981\u6253\u901a\u6570\u636e\u91c7\u96c6\u3001\u4f20\u8f93\u3001\u5b58\u50a8\u3001\u5206\u6790\u7684\u5168\u94fe\u8def\u95ed\u73af\uff1a \u5185\u6838\u4e8b\u4ef6\u91c7\u96c6 \u901a\u8fc7\u7f16\u5199eBPF\u7a0b\u5e8f\uff0c\u6302\u94a9\u4ee5\u4e0b\u5173\u952e\u70b9\uff1a \u7f51\u7edc\u5c42\uff1atc\uff08\u6d41\u91cf\u63a7\u5236\uff09\u6302\u94a9\u70b9\u6355\u83b7\u8fdb\u51fa\u5bb9\u5668\u7684\u6240\u6709\u6570\u636e\u5305\uff1b \u7cfb\u7edf\u8c03\u7528\uff1atracepoint\/syscalls\u8ddf\u8e2a\u8de8\u8282\u70b9RPC\u7684\u8bfb\u5199\u64cd\u4f5c\uff1b \u8c03\u5ea6\u5668\uff1asched_switch\u4e8b\u4ef6\u5206\u6790CPU\u7b49\u5f85\u961f\u5217\u5bf9\u5ef6\u8fdf\u7684\u5f71\u54cd\u3002 \/\/ \u793a\u4f8b\uff1a\u8ffd\u8e2aTCP\u91cd\u4f20\u4e8b\u4ef6\u7684eBPF\u4ee3\u7801\u7247\u6bb5 SEC(&quot;tracepoint\/tcp\/tcp_retransmit_skb&quot;) int handle_tcp_retransmit(struct trace_event_raw_tcp_event *ctx) { u32 pid = bpf_get_current_pid_tgid() &gt;&gt; 32; u32 saddr = ctx-&gt;saddr, daddr = ctx-&gt;daddr; bpf_printk(&quot;PID %d retransmit from %x [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-37041","post","type-post","status-publish","format-standard","hentry","category-product-news"],"_links":{"self":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37041","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/comments?post=37041"}],"version-history":[{"count":1,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37041\/revisions"}],"predecessor-version":[{"id":37043,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37041\/revisions\/37043"}],"wp:attachment":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media?parent=37041"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/categories?post=37041"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/tags?post=37041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}