{"id":37458,"date":"2025-04-18T11:29:07","date_gmt":"2025-04-18T03:29:07","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=37458"},"modified":"2025-04-18T11:29:07","modified_gmt":"2025-04-18T03:29:07","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-ebpf-%e4%bc%98%e5%8c%96%e5%ae%b9%e5%99%a8%e5%8c%96%e5%ba%94%e7%94%a8%e7%9a%84%e6%80%a7%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/37458.html","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 eBPF \u4f18\u5316\u5bb9\u5668\u5316\u5e94\u7528\u7684\u6027\u80fd\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2025\/04\/W9VjuC2D80.jpg\" alt=\"\u5982\u4f55\u4f7f\u7528 eBPF \u4f18\u5316\u5bb9\u5668\u5316\u5e94\u7528\u7684\u6027\u80fd\uff1f\" ><\/p>\n<\/p>\n<p>\u5728\u4e91\u8ba1\u7b97\u548c\u5fae\u670d\u52a1\u67b6\u6784\u4e3b\u5bfc\u7684\u6570\u5b57\u5316\u65f6\u4ee3\uff0c\u5bb9\u5668\u5316\u6280\u672f\u5df2\u6210\u4e3a\u5e94\u7528\u90e8\u7f72\u7684\u9ec4\u91d1\u6807\u51c6\u3002Kubernetes\u96c6\u7fa4\u6bcf\u5929\u8c03\u5ea6\u7740\u6570\u4ee5\u767e\u4e07\u8ba1\u7684\u5bb9\u5668\u5b9e\u4f8b\uff0c\u4f46\u968f\u4e4b\u800c\u6765\u7684\u7f51\u7edc\u5ef6\u8fdf\u6fc0\u589e\u3001\u8d44\u6e90\u4e89\u7528\u52a0\u5267\u3001\u6545\u969c\u5b9a\u4f4d\u56f0\u96be\u7b49\u95ee\u9898\uff0c\u6b63\u6210\u4e3a\u5de5\u7a0b\u5e08\u4eec\u65b0\u7684\u201c\u6027\u80fd\u5669\u68a6\u201d\u3002\u5f53\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u5728\u52a8\u6001\u5bb9\u5668\u73af\u5883\u4e2d\u6349\u895f\u89c1\u8098\u65f6\uff0c\u4e00\u9879\u9769\u547d\u6027\u7684\u5185\u6838\u6280\u672f\u2014\u2014<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a><\/strong>\uff08Extended Berkeley Packet Filter\uff09\u2014\u2014\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u6027\u80fd\u4f18\u5316\u7684\u8fb9\u754c\u3002\u5b83\u5982\u540cX\u5c04\u7ebf\u822c\u7a7f\u900f\u5bb9\u5668\u9694\u79bb\u5c42\uff0c\u5c06\u539f\u672c\u6df7\u6c8c\u7684\u8fd0\u884c\u65f6\u6570\u636e\u8f6c\u5316\u4e3a\u7cbe\u51c6\u7684\u6027\u80fd\u6d1e\u5bdf\u3002<\/p>\n<hr>\n<h3 id=\"\u4e00-ebpf-\u5bb9\u5668\u89c2\u6d4b\u7684-\u900f\u89c6\u4e4b\u773c\">\u4e00\u3001<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff1a\u5bb9\u5668\u89c2\u6d4b\u7684\u201c\u900f\u89c6\u4e4b\u773c\u201d<\/h3>\n<p>\u4f20\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u5982top\u3001strace\u5728\u5bb9\u5668\u573a\u666f\u4e2d\u9762\u4e34\u4e09\u5927\u56f0\u5883\uff1a<strong>\u89c2\u6d4b\u76f2\u533a<\/strong>\uff08\u65e0\u6cd5\u8ffd\u8e2a\u8de8\u5bb9\u5668\u901a\u4fe1\uff09\u3001<strong>\u8d44\u6e90\u635f\u8017<\/strong>\uff08\u9ad8\u91c7\u6837\u7387\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff09\u3001<strong>\u6570\u636e\u788e\u7247\u5316<\/strong>\uff08\u7f3a\u4e4f\u5168\u5c40\u5173\u8054\uff09\u3002eBPF\u901a\u8fc7\u5728\u5185\u6838\u5c42\u690d\u5165\u5fae\u578b\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4e86\u5bf9\u5bb9\u5668\u884c\u4e3a\u7684<strong>\u96f6\u4fb5\u5165\u5f0f\u89c2\u6d4b<\/strong>\u3002\u5176\u5de5\u4f5c\u539f\u7406\u53ef\u7c7b\u6bd4\u4e3a\u5728Linux\u5185\u6838\u4e2d\u90e8\u7f72\u667a\u80fd\u4f20\u611f\u5668\u7f51\uff1a\u5f53\u5bb9\u5668\u8fdb\u7a0b\u6267\u884c\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u4f20\u8f93\u6216\u6587\u4ef6\u64cd\u4f5c\u65f6\uff0ceBPF\u7a0b\u5e8f\u5b9e\u65f6\u6355\u83b7\u4e8b\u4ef6\uff0c\u5e76\u901a\u8fc7\u73af\u5f62\u7f13\u51b2\u533a\u5c06\u6570\u636e\u63a8\u9001\u5230\u7528\u6237\u7a7a\u95f4\u3002<\/p>\n<p>\u8fd9\u79cd\u673a\u5236\u5e26\u6765\u4e86\u4e09\u91cd\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u7ea7\u7cbe\u5ea6<\/strong>\uff1a\u53ef\u8ffd\u8e2a\u5355\u4e2a\u5bb9\u5668\u7684\u7cfb\u7edf\u8c03\u7528\u9891\u6b21\u3001\u5185\u5b58\u9875\u9519\u8bef\u7b49\u5fae\u89c2\u6307\u6807\n<\/li>\n<li><strong>\u5168\u666f\u89c6\u56fe<\/strong>\uff1a\u81ea\u52a8\u5173\u8054Pod\u3001\u8282\u70b9\u3001\u670d\u52a1\u7b49\u591a\u5c42\u62d3\u6251\u5173\u7cfb\n<\/li>\n<li><strong>\u96f6\u6027\u80fd\u635f\u8017<\/strong>\uff1a\u7a0b\u5e8f\u8fd0\u884c\u5728JIT\u7f16\u8bd1\u7684\u6c99\u7bb1\u4e2d\uff0cCPU\u5360\u7528\u7387\u901a\u5e38\u4f4e\u4e8e1%\n<\/li>\n<\/ul>\n<p>\u56fd\u9645\u77e5\u540d\u4e91\u670d\u52a1\u5546DigitalOcean\u7684\u6848\u4f8b\u663e\u793a\uff0c\u91c7\u7528eBPF\u540e\u5176\u5bb9\u5668\u96c6\u7fa4\u7684\u6545\u969c\u5b9a\u4f4d\u65f6\u95f4\u7f29\u77ed\u4e8683%\uff0c\u7f51\u7edc\u541e\u5410\u91cf\u63d0\u5347\u4e8637%\u3002<\/p>\n<hr>\n<h3 id=\"\u4e8c-\u56db\u7ef4\u4f18\u5316-ebpf\u89e3\u9501\u5bb9\u5668\u6027\u80fd\u7684\u5173\u952e\u8def\u5f84\">\u4e8c\u3001\u56db\u7ef4\u4f18\u5316\uff1aeBPF\u89e3\u9501\u5bb9\u5668\u6027\u80fd\u7684\u5173\u952e\u8def\u5f84<\/h3>\n<h4 id=\"1-\u7f51\u7edc\u6d41\u91cf\u900f\u89c6\u4e0e\u52a0\u901f\">1. <strong>\u7f51\u7edc\u6d41\u91cf\u900f\u89c6\u4e0e\u52a0\u901f<\/strong><\/h4>\n<p>\u5728Kubernetes\u7684\u590d\u6742\u7f51\u7edc\u62d3\u6251\u4e2d\uff0c<strong>Cilium<\/strong>\u7b49\u57fa\u4e8eeBPF\u7684CNI\u63d2\u4ef6\u6b63\u5728\u53d6\u4ee3iptables\u3002\u901a\u8fc7\u5c06kube-proxy\u7684\u7f51\u7edc\u89c4\u5219\u4eceiptables\u8fc1\u79fb\u5230eBPF\u54c8\u5e0c\u8868\uff0c\u670d\u52a1\u8f6c\u53d1\u7684\u5ef6\u8fdf\u4ece\u6beb\u79d2\u7ea7\u964d\u81f3\u5fae\u79d2\u7ea7\u3002\u67d0\u7535\u5546\u5e73\u53f0\u5b9e\u6d4b\u663e\u793a\uff0c\u5728200\u8282\u70b9\u96c6\u7fa4\u4e2d\uff0ceBPF\u5c06API\u7f51\u5173\u7684P99\u5ef6\u8fdf\u4ece58ms\u538b\u7f29\u52309ms\u3002<\/p>\n<p><em>\u4f18\u5316\u6280\u5de7<\/em>\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 <code>tc-bpf<\/code> \u5bf9\u5bb9\u5668\u7f51\u5361\u6d41\u91cf\u8fdb\u884cQoS\u5206\u7ea7\n<\/li>\n<li>\u901a\u8fc7 <code>BPF_PROG_TYPE_SOCK_OPS<\/code> \u5b9e\u73b0TCP\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\u52a8\u6001\u8c03\u4f18\n<\/li>\n<li>\u90e8\u7f72HTTP\/2\u534f\u8bae\u89e3\u6790\u5668\uff0c\u81ea\u52a8\u8bc6\u522b\u5f02\u5e38gRPC\u8c03\u7528\n<\/li>\n<\/ul>\n<h4 id=\"2-\u8d44\u6e90\u8c03\u5ea6\u667a\u80fd\u51b3\u7b56\">2. <strong>\u8d44\u6e90\u8c03\u5ea6\u667a\u80fd\u51b3\u7b56<\/strong><\/h4>\n<p>eBPF\u80fd\u7cbe\u786e\u7edf\u8ba1\u5bb9\u5668\u7ea7\u522b\u7684CPU\u8c03\u5ea6\u5ef6\u8fdf\u3001\u5185\u5b58\u7f3a\u9875\u5f02\u5e38\u7b49\u6307\u6807\u3002\u7ed3\u5408<strong>cgroup v2<\/strong>\u7684\u538b\u529b\u4fe1\u53f7\uff0c\u53ef\u5b9e\u73b0\u52a8\u6001\u8d44\u6e90\u914d\u989d\u8c03\u6574\u3002\u4f8b\u5982\uff0c\u5f53\u68c0\u6d4b\u5230\u67d0Pod\u7684major page faults\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u81ea\u52a8\u89e6\u53d1\u5782\u76f4\u6269\u7f29\u5bb9\uff08VPA\uff09\u3002<\/p>\n<p><em>\u5173\u952e\u6307\u6807\u8ffd\u8e2a<\/em>\uff1a<\/p>\n<pre><code class=\"language-c\">SEC(&quot;perf_event&quot;)  \r\nint handle_mm_fault(struct bpf_perf_event_data *ctx) {  \r\nu64 pid = bpf_get_current_pid_tgid();  \r\nif (is_target_container(pid)) {  \r\natomic_increment(&amp;page_fault_count);  \r\n}  \r\nreturn 0;  \r\n}  \r\n<\/code><\/pre>\n<h4 id=\"3-\u5b58\u50a8i-o\u74f6\u9888\u5b9a\u4f4d\">3. <strong>\u5b58\u50a8I\/O\u74f6\u9888\u5b9a\u4f4d<\/strong><\/h4>\n<p>\u901a\u8fc7\u6302\u8f7d<code>bpftrace<\/code>\u811a\u672c\u5230<code>block:block_rq_complete<\/code>\u63a2\u9488\uff0c\u53ef\u7ed8\u5236\u5bb9\u5668\u5b58\u50a8IO\u7684\u70ed\u529b\u56fe\u3002\u67d0\u89c6\u9891\u6d41\u5a92\u4f53\u516c\u53f8\u4f7f\u7528\u8be5\u6280\u672f\uff0c\u6210\u529f\u53d1\u73b0\u65e5\u5fd7\u5bb9\u5668\u4e0e\u6570\u636e\u5e93\u5bb9\u5668\u95f4\u7684\u78c1\u76d8\u5e26\u5bbd\u4e89\u7528\u95ee\u9898\uff0c\u901a\u8fc7\u5206\u79bb\u5b58\u50a8\u5377\u4f7fIOPS\u63d0\u5347\u4e864\u500d\u3002<\/p>\n<h4 id=\"4-\u5b89\u5168\u4e0e\u6027\u80fd\u7684\u7edf\u4e00\u6cbb\u7406\">4. <strong>\u5b89\u5168\u4e0e\u6027\u80fd\u7684\u7edf\u4e00\u6cbb\u7406<\/strong><\/h4>\n<p>eBPF\u7684\u5b89\u5168\u80fd\u529b\u5e38\u88ab\u5ffd\u89c6\uff0c\u5b9e\u5219\u5176\u80fd\u901a\u8fc7<strong>\u8fdb\u7a0b\u884c\u4e3a\u753b\u50cf<\/strong>\u9884\u9632\u6027\u80fd\u52a3\u5316\u3002\u4f8b\u5982\uff0c\u68c0\u6d4b\u5230\u5bb9\u5668\u5185\u5f02\u5e38\u542f\u52a8\u7684\u6316\u77ff\u7a0b\u5e8f\u540e\uff0c\u4e0d\u4ec5\u53ef\u53ca\u65f6\u544a\u8b66\uff0c\u8fd8\u80fd\u901a\u8fc7<code>bpf_override_return<\/code>\u76f4\u63a5\u963b\u65ad\u7cfb\u7edf\u8c03\u7528\uff0c\u907f\u514dCPU\u8d44\u6e90\u8017\u5c3d\u3002<\/p>\n<hr>\n<h3 id=\"\u4e09-\u5b9e\u8df5\u84dd\u56fe-\u4ece\u89c2\u6d4b\u5230\u4f18\u5316\u7684\u4e09\u6b65\u8de8\u8d8a\">\u4e09\u3001\u5b9e\u8df5\u84dd\u56fe\uff1a\u4ece\u89c2\u6d4b\u5230\u4f18\u5316\u7684\u4e09\u6b65\u8de8\u8d8a<\/h3>\n<h4 id=\"\u9636\u6bb51-\u6784\u5efa\u53ef\u89c2\u6d4b\u6027\u57fa\u5ea7\">\u9636\u6bb51\uff1a\u6784\u5efa\u53ef\u89c2\u6d4b\u6027\u57fa\u5ea7<\/h4>\n<ul>\n<li>\u90e8\u7f72<strong>Pixie<\/strong>\u5b9e\u65f6\u91c7\u96c6Kubernetes\u96c6\u7fa4\u7684eBPF\u6307\u6807\n<\/li>\n<li>\u4f7f\u7528<strong>Grafana Labs<\/strong>\u7684Beyla\u5de5\u5177\u81ea\u52a8\u751f\u6210RED\uff08Rate, Errors, Duration\uff09\u4eea\u8868\u76d8\n<\/li>\n<li>\u91cd\u70b9\u76d1\u63a7\u5bb9\u5668\u751f\u547d\u5468\u671f\u4e8b\u4ef6\uff08create\/start\/stop\uff09\u4e0e\u8d44\u6e90\u7ea6\u675f\u7684\u5173\u8054\u6027\n<\/li>\n<\/ul>\n<h4 id=\"\u9636\u6bb52-\u5b9e\u65bd\u6e10\u8fdb\u5f0f\u4f18\u5316\">\u9636\u6bb52\uff1a\u5b9e\u65bd\u6e10\u8fdb\u5f0f\u4f18\u5316<\/h4>\n<ul>\n<li>\u7f51\u7edc\u5c42\uff1a\u7528Cilium\u66ff\u6362Flannel\uff0c\u542f\u7528\u57fa\u4e8eeBPF\u7684kube-proxy\u66ff\u4ee3\u65b9\u6848\n<\/li>\n<li>\u8fd0\u884c\u65f6\uff1a\u901a\u8fc7BCC\u5de5\u5177\u96c6\u7684<code>funclatency<\/code>\u8ffd\u8e2a\u5bb9\u5668\u51fd\u6570\u7684\u5ef6\u8fdf\u5206\u5e03\n<\/li>\n<li>\u8c03\u5ea6\u5c42\uff1a\u57fa\u4e8e<code>runqlat<\/code>\u6307\u6807\u4f18\u5316CPU\u7ed1\u6838\u7b56\u7565\n<\/li>\n<\/ul>\n<h4 id=\"\u9636\u6bb53-\u95ed\u73af\u667a\u80fd\u8c03\u63a7\">\u9636\u6bb53\uff1a\u95ed\u73af\u667a\u80fd\u8c03\u63a7<\/h4>\n<ul>\n<li>\u5c06eBPF\u6307\u6807\u63a5\u5165<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">Prometheus<\/a>\uff0c\u8bad\u7ec3\u8d44\u6e90\u9884\u6d4b\u6a21\u578b\n<\/li>\n<li>\u5f00\u53d1\u81ea\u9002\u5e94\u8c03\u8282\u5668\uff0c\u6839\u636e<code>biostacks<\/code>\u8ddf\u8e2a\u7684\u5757\u8bbe\u5907\u5ef6\u8fdf\u52a8\u6001\u8c03\u6574IO\u8c03\u5ea6\u5668\n<\/li>\n<li>\u5b9e\u73b0\u57fa\u4e8e\u8bf7\u6c42\u6a21\u5f0f\u7684\u81ea\u52a8\u6269\u7f29\u5bb9\uff0c\u5982\u68c0\u6d4b\u5230gRPC\u6d41\u6301\u7eed\u8d85\u65f6\u81ea\u52a8\u6269\u5bb9sidecar\n<\/li>\n<\/ul>\n<hr>\n<h3 id=\"\u56db-\u907f\u5751\u6307\u5357-ebpf\u843d\u5730\u7684\u4e09\u5927\u94c1\u5f8b\">\u56db\u3001\u907f\u5751\u6307\u5357\uff1aeBPF\u843d\u5730\u7684\u4e09\u5927\u94c1\u5f8b<\/h3>\n<ol>\n<li>\n<p><strong>\u5185\u6838\u7248\u672c\u5bf9\u9f50<\/strong><br \/>\neBPF\u7279\u6027\u4e0e\u5185\u6838\u7248\u672c\u5f3a\u76f8\u5173\uff0c\u5efa\u8bae\u91c7\u75285.10+ LTS\u5185\u6838\u3002\u5bf9\u4e8e\u65e7\u7248Kubernetes\u8282\u70b9\uff0c\u53ef\u4f7f\u7528<code>bpftool feature probe<\/code>\u68c0\u67e5CO-RE\uff08Compile Once \u2013 Run Everywhere\uff09\u652f\u6301\u60c5\u51b5\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8d44\u6e90\u9650\u989d\u7ba1\u63a7<\/strong><br \/>\n\u867d\u7136eBPF\u7a0b\u5e8f\u672c\u8eab\u6d88\u8017\u6781\u4f4e\uff0c\u4f46\u9700\u6ce8\u610f\uff1a<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li>\u63a7\u5236map\u7684\u5185\u5b58\u4e0a\u9650\u9632\u6b62OOM\n<\/li>\n<li>\u8bbe\u7f6eperf\u7f13\u51b2\u533a\u7684\u5408\u7406\u5927\u5c0f\n<\/li>\n<li>\u7981\u7528\u975e\u5fc5\u8981\u7684\u5168\u5c40\u91c7\u6837\uff08\u5982\u5168\u91cf\u6293\u5305\uff09\n<\/li>\n<\/ul>\n<ol>\n<li><strong>\u5408\u89c4\u6027\u5ba1\u8ba1<\/strong><br \/>\n\u5728\u91d1\u878d\u3001\u533b\u7597\u7b49\u654f\u611f\u9886\u57df\uff0c\u9700\u5ba1\u67e5eBPF\u7a0b\u5e8f\u7684\uff1a\n<\/li>\n<\/ol>\n<ul>\n<li>\u6570\u636e\u91c7\u96c6\u8303\u56f4\uff08\u907f\u514d\u6355\u83b7\u654f\u611f\u8d1f\u8f7d\uff09\n<\/li>\n<li>\u63a2\u9488\u6302\u8f7d\u6743\u9650\uff08\u9075\u5faa\u6700\u5c0f\u7279\u6743\u539f\u5219\uff09\n<\/li>\n<li>\u4ee3\u7801\u6765\u6e90\u53ef\u4fe1\u5ea6\uff08\u5efa\u8bae\u4f7f\u7528CNCF\u8ba4\u8bc1\u9879\u76ee\uff09\n<\/li>\n<\/ul>\n<hr>\n<h3 id=\"\u4e94-\u672a\u6765\u6218\u573a-ebpf\u4e0ewebassembly\u7684\u878d\u5408\u9769\u547d\">\u4e94\u3001\u672a\u6765\u6218\u573a\uff1aeBPF\u4e0eWebAssembly\u7684\u878d\u5408\u9769\u547d<\/h3>\n<p>\u968f\u7740Wasm-bpf\u9879\u76ee\u7684\u6210\u719f\uff0ceBPF\u6b63\u7a81\u7834\u5185\u6838\u8fb9\u754c\u3002\u5f00\u53d1\u8005\u53ef\u7528R<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4e91\u8ba1\u7b97\u548c\u5fae\u670d\u52a1\u67b6\u6784\u4e3b\u5bfc\u7684\u6570\u5b57\u5316\u65f6\u4ee3\uff0c\u5bb9\u5668\u5316\u6280\u672f\u5df2\u6210\u4e3a\u5e94\u7528\u90e8\u7f72\u7684\u9ec4\u91d1\u6807\u51c6\u3002Kubernetes\u96c6\u7fa4\u6bcf\u5929\u8c03\u5ea6\u7740\u6570\u4ee5\u767e\u4e07\u8ba1\u7684\u5bb9\u5668\u5b9e\u4f8b\uff0c\u4f46\u968f\u4e4b\u800c\u6765\u7684\u7f51\u7edc\u5ef6\u8fdf\u6fc0\u589e\u3001\u8d44\u6e90\u4e89\u7528\u52a0\u5267\u3001\u6545\u969c\u5b9a\u4f4d\u56f0\u96be\u7b49\u95ee\u9898\uff0c\u6b63\u6210\u4e3a\u5de5\u7a0b\u5e08\u4eec\u65b0\u7684\u201c\u6027\u80fd\u5669\u68a6\u201d\u3002\u5f53\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u5728\u52a8\u6001\u5bb9\u5668\u73af\u5883\u4e2d\u6349\u895f\u89c1\u8098\u65f6\uff0c\u4e00\u9879\u9769\u547d\u6027\u7684\u5185\u6838\u6280\u672f\u2014\u2014eBPF\uff08Extended Berkeley Packet Filter\uff09\u2014\u2014\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u6027\u80fd\u4f18\u5316\u7684\u8fb9\u754c\u3002\u5b83\u5982\u540cX\u5c04\u7ebf\u822c\u7a7f\u900f\u5bb9\u5668\u9694\u79bb\u5c42\uff0c\u5c06\u539f\u672c\u6df7\u6c8c\u7684\u8fd0\u884c\u65f6\u6570\u636e\u8f6c\u5316\u4e3a\u7cbe\u51c6\u7684\u6027\u80fd\u6d1e\u5bdf\u3002 \u4e00\u3001eBPF\uff1a\u5bb9\u5668\u89c2\u6d4b\u7684\u201c\u900f\u89c6\u4e4b\u773c\u201d \u4f20\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u5982top\u3001strace\u5728\u5bb9\u5668\u573a\u666f\u4e2d\u9762\u4e34\u4e09\u5927\u56f0\u5883\uff1a\u89c2\u6d4b\u76f2\u533a\uff08\u65e0\u6cd5\u8ffd\u8e2a\u8de8\u5bb9\u5668\u901a\u4fe1\uff09\u3001\u8d44\u6e90\u635f\u8017\uff08\u9ad8\u91c7\u6837\u7387\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff09\u3001\u6570\u636e\u788e\u7247\u5316\uff08\u7f3a\u4e4f\u5168\u5c40\u5173\u8054\uff09\u3002eBPF\u901a\u8fc7\u5728\u5185\u6838\u5c42\u690d\u5165\u5fae\u578b\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4e86\u5bf9\u5bb9\u5668\u884c\u4e3a\u7684\u96f6\u4fb5\u5165\u5f0f\u89c2\u6d4b\u3002\u5176\u5de5\u4f5c\u539f\u7406\u53ef\u7c7b\u6bd4\u4e3a\u5728Linux\u5185\u6838\u4e2d\u90e8\u7f72\u667a\u80fd\u4f20\u611f\u5668\u7f51\uff1a\u5f53\u5bb9\u5668\u8fdb\u7a0b\u6267\u884c\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u4f20\u8f93\u6216\u6587\u4ef6\u64cd\u4f5c\u65f6\uff0ceBPF\u7a0b\u5e8f\u5b9e\u65f6\u6355\u83b7\u4e8b\u4ef6\uff0c\u5e76\u901a\u8fc7\u73af\u5f62\u7f13\u51b2\u533a\u5c06\u6570\u636e\u63a8\u9001\u5230\u7528\u6237\u7a7a\u95f4\u3002 \u8fd9\u79cd\u673a\u5236\u5e26\u6765\u4e86\u4e09\u91cd\u4f18\u52bf\uff1a \u539f\u5b50\u7ea7\u7cbe\u5ea6\uff1a\u53ef\u8ffd\u8e2a\u5355\u4e2a\u5bb9\u5668\u7684\u7cfb\u7edf\u8c03\u7528\u9891\u6b21\u3001\u5185\u5b58\u9875\u9519\u8bef\u7b49\u5fae\u89c2\u6307\u6807 \u5168\u666f\u89c6\u56fe\uff1a\u81ea\u52a8\u5173\u8054Pod\u3001\u8282\u70b9\u3001\u670d\u52a1\u7b49\u591a\u5c42\u62d3\u6251\u5173\u7cfb \u96f6\u6027\u80fd\u635f\u8017\uff1a\u7a0b\u5e8f\u8fd0\u884c\u5728JIT\u7f16\u8bd1\u7684\u6c99\u7bb1\u4e2d\uff0cCPU\u5360\u7528\u7387\u901a\u5e38\u4f4e\u4e8e1% \u56fd\u9645\u77e5\u540d\u4e91\u670d\u52a1\u5546DigitalOcean\u7684\u6848\u4f8b\u663e\u793a\uff0c\u91c7\u7528eBPF\u540e\u5176\u5bb9\u5668\u96c6\u7fa4\u7684\u6545\u969c\u5b9a\u4f4d\u65f6\u95f4\u7f29\u77ed\u4e8683%\uff0c\u7f51\u7edc\u541e\u5410\u91cf\u63d0\u5347\u4e8637%\u3002 \u4e8c\u3001\u56db\u7ef4\u4f18\u5316\uff1aeBPF\u89e3\u9501\u5bb9\u5668\u6027\u80fd\u7684\u5173\u952e\u8def\u5f84 1. \u7f51\u7edc\u6d41\u91cf\u900f\u89c6\u4e0e\u52a0\u901f \u5728Kubernetes\u7684\u590d\u6742\u7f51\u7edc\u62d3\u6251\u4e2d\uff0cCilium\u7b49\u57fa\u4e8eeBPF\u7684CNI\u63d2\u4ef6\u6b63\u5728\u53d6\u4ee3iptables\u3002\u901a\u8fc7\u5c06kube-proxy\u7684\u7f51\u7edc\u89c4\u5219\u4eceiptables\u8fc1\u79fb\u5230eBPF\u54c8\u5e0c\u8868\uff0c\u670d\u52a1\u8f6c\u53d1\u7684\u5ef6\u8fdf\u4ece\u6beb\u79d2\u7ea7\u964d\u81f3\u5fae\u79d2\u7ea7\u3002\u67d0\u7535\u5546\u5e73\u53f0\u5b9e\u6d4b\u663e\u793a\uff0c\u5728200\u8282\u70b9\u96c6\u7fa4\u4e2d\uff0ceBPF\u5c06API\u7f51\u5173\u7684P99\u5ef6\u8fdf\u4ece58ms\u538b\u7f29\u52309ms\u3002 \u4f18\u5316\u6280\u5de7\uff1a \u4f7f\u7528 tc-bpf \u5bf9\u5bb9\u5668\u7f51\u5361\u6d41\u91cf\u8fdb\u884cQoS\u5206\u7ea7 \u901a\u8fc7 BPF_PROG_TYPE_SOCK_OPS \u5b9e\u73b0TCP\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\u52a8\u6001\u8c03\u4f18 \u90e8\u7f72HTTP\/2\u534f\u8bae\u89e3\u6790\u5668\uff0c\u81ea\u52a8\u8bc6\u522b\u5f02\u5e38gRPC\u8c03\u7528 2. \u8d44\u6e90\u8c03\u5ea6\u667a\u80fd\u51b3\u7b56 eBPF\u80fd\u7cbe\u786e\u7edf\u8ba1\u5bb9\u5668\u7ea7\u522b\u7684CPU\u8c03\u5ea6\u5ef6\u8fdf\u3001\u5185\u5b58\u7f3a\u9875\u5f02\u5e38\u7b49\u6307\u6807\u3002\u7ed3\u5408cgroup v2\u7684\u538b\u529b\u4fe1\u53f7\uff0c\u53ef\u5b9e\u73b0\u52a8\u6001\u8d44\u6e90\u914d\u989d\u8c03\u6574\u3002\u4f8b\u5982\uff0c\u5f53\u68c0\u6d4b\u5230\u67d0Pod\u7684major page faults\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u81ea\u52a8\u89e6\u53d1\u5782\u76f4\u6269\u7f29\u5bb9\uff08VPA\uff09\u3002 \u5173\u952e\u6307\u6807\u8ffd\u8e2a\uff1a SEC(&quot;perf_event&quot;) int handle_mm_fault(struct bpf_perf_event_data *ctx) { u64 pid = bpf_get_current_pid_tgid(); if (is_target_container(pid)) { atomic_increment(&amp;page_fault_count); } return 0; } 3. \u5b58\u50a8I\/O\u74f6\u9888\u5b9a\u4f4d \u901a\u8fc7\u6302\u8f7dbpftrace\u811a\u672c\u5230block:block_rq_complete\u63a2\u9488\uff0c\u53ef\u7ed8\u5236\u5bb9\u5668\u5b58\u50a8IO\u7684\u70ed\u529b\u56fe\u3002\u67d0\u89c6\u9891\u6d41\u5a92\u4f53\u516c\u53f8\u4f7f\u7528\u8be5\u6280\u672f\uff0c\u6210\u529f\u53d1\u73b0\u65e5\u5fd7\u5bb9\u5668\u4e0e\u6570\u636e\u5e93\u5bb9\u5668\u95f4\u7684\u78c1\u76d8\u5e26\u5bbd\u4e89\u7528\u95ee\u9898\uff0c\u901a\u8fc7\u5206\u79bb\u5b58\u50a8\u5377\u4f7fIOPS\u63d0\u5347\u4e864\u500d\u3002 4. \u5b89\u5168\u4e0e\u6027\u80fd\u7684\u7edf\u4e00\u6cbb\u7406 eBPF\u7684\u5b89\u5168\u80fd\u529b\u5e38\u88ab\u5ffd\u89c6\uff0c\u5b9e\u5219\u5176\u80fd\u901a\u8fc7\u8fdb\u7a0b\u884c\u4e3a\u753b\u50cf\u9884\u9632\u6027\u80fd\u52a3\u5316\u3002\u4f8b\u5982\uff0c\u68c0\u6d4b\u5230\u5bb9\u5668\u5185\u5f02\u5e38\u542f\u52a8\u7684\u6316\u77ff\u7a0b\u5e8f\u540e\uff0c\u4e0d\u4ec5\u53ef\u53ca\u65f6\u544a\u8b66\uff0c\u8fd8\u80fd\u901a\u8fc7bpf_override_return\u76f4\u63a5\u963b\u65ad\u7cfb\u7edf\u8c03\u7528\uff0c\u907f\u514dCPU\u8d44\u6e90\u8017\u5c3d\u3002 \u4e09\u3001\u5b9e\u8df5\u84dd\u56fe\uff1a\u4ece\u89c2\u6d4b\u5230\u4f18\u5316\u7684\u4e09\u6b65\u8de8\u8d8a [&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-37458","post","type-post","status-publish","format-standard","hentry","category-product-news"],"_links":{"self":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37458","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=37458"}],"version-history":[{"count":1,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37458\/revisions"}],"predecessor-version":[{"id":37460,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37458\/revisions\/37460"}],"wp:attachment":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media?parent=37458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/categories?post=37458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/tags?post=37458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}