{"id":37566,"date":"2025-04-18T11:41:39","date_gmt":"2025-04-18T03:41:39","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=37566"},"modified":"2025-04-18T11:41:39","modified_gmt":"2025-04-18T03:41:39","slug":"%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8ebpf%e8%bf%9b%e8%a1%8c%e7%b3%bb%e7%bb%9f%e8%b0%83%e7%94%a8%e7%9a%84%e6%80%a7%e8%83%bd%e5%88%86%e6%9e%90%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/37566.html","title":{"rendered":"\u5982\u4f55\u5229\u7528eBPF\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u7684\u6027\u80fd\u5206\u6790\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2025\/04\/7V16ZWE.jpg\" alt=\"\u5982\u4f55\u5229\u7528eBPF\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u7684\u6027\u80fd\u5206\u6790\uff1f\" ><\/p>\n<\/p>\n<p>\u5728\u4e91\u539f\u751f\u67b6\u6784\u4e0e\u5bb9\u5668\u5316\u6280\u672f\u84ec\u52c3\u53d1\u5c55\u7684\u4eca\u5929\uff0c\u7cfb\u7edf\u8c03\u7528\u7684\u6027\u80fd\u74f6\u9888\u72b9\u5982\u9690\u85cf\u5728\u7cbe\u5bc6\u673a\u68b0\u4e2d\u7684\u5fae\u5c0f\u7802\u783e\u3002\u5f53\u5de5\u7a0b\u5e08\u4eec\u9762\u5bf9\u6bcf\u79d2\u767e\u4e07\u6b21\u8bf7\u6c42\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u65f6\uff0c\u4f20\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u5982\u540c\u7528\u653e\u5927\u955c\u89c2\u5bdf\u6d41\u661f\u96e8\u2014\u2014\u4e0d\u4ec5\u96be\u4ee5\u6355\u6349\u5173\u952e\u7ec6\u8282\uff0c\u66f4\u53ef\u80fd\u56e0\u89c2\u6d4b\u624b\u6bb5\u672c\u8eab\u7684\u6027\u80fd\u635f\u8017\u800c\u626d\u66f2\u771f\u5b9e\u573a\u666f\u3002\u6b63\u662f\u5728\u8fd9\u6837\u7684\u6280\u672f\u56f0\u5c40\u4e2d\uff0c<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\u6280\u672f<\/strong>\u72b9\u5982\u4e00\u67c4\u7cbe\u5bc6\u7684\u624b\u672f\u5200\uff0c\u4e3a\u7cfb\u7edf\u8c03\u7528\u7684\u6027\u80fd\u5206\u6790\u5f00\u8f9f\u4e86\u9769\u547d\u6027\u7684\u89c2\u6d4b\u7ef4\u5ea6\u3002<\/p>\n<h3 id=\"\u4e00-ebpf-\u5185\u6838\u53ef\u89c2\u6d4b\u6027\u7684\u91cf\u5b50\u8dc3\u8fc1\">\u4e00\u3001<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff1a\u5185\u6838\u53ef\u89c2\u6d4b\u6027\u7684\u91cf\u5b50\u8dc3\u8fc1<\/h3>\n<p>eBPF\uff08Extended Berkeley Packet Filter\uff09\u7684\u672c\u8d28\u662f<strong>\u5b89\u5168\u7684\u5185\u6838\u7ea7\u865a\u62df\u673a<\/strong>\uff0c\u5176\u901a\u8fc7\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u6280\u672f\u5c06\u7528\u6237\u7f16\u5199\u7684\u7a0b\u5e8f\u6ce8\u5165\u5185\u6838\u6267\u884c\u3002\u4e0e\u9700\u8981\u91cd\u65b0\u7f16\u8bd1\u5185\u6838\u7684\u4f20\u7edf\u8c03\u8bd5\u65b9\u5f0f\u4e0d\u540c\uff0ceBPF\u7a0b\u5e8f\u9075\u5faa\u4e25\u683c\u7684\u5b89\u5168\u9a8c\u8bc1\u673a\u5236\u2014\u2014\u8fd9\u79cd\u673a\u5236\u7c7b\u4f3c\u4e8e\u673a\u573a\u7684\u5b89\u68c0\u7cfb\u7edf\uff0c\u901a\u8fc7\u9884\u5b9a\u4e49\u7684\u89c4\u5219\u786e\u4fdd\u7a0b\u5e8f\u4e0d\u4f1a\u5f15\u53d1\u5185\u6838\u5d29\u6e83\u6216\u6570\u636e\u6cc4\u9732\u3002<\/p>\n<p>\u5728\u7cfb\u7edf\u8c03\u7528\u76d1\u63a7\u573a\u666f\u4e2d\uff0ceBPF\u5c55\u73b0\u51fa\u4e09\u5927\u6838\u5fc3\u4f18\u52bf\uff1a<\/p>\n<ol>\n<li><strong>\u96f6\u91c7\u6837\u635f\u8017<\/strong>\uff1a\u4f20\u7edf\u5de5\u5177\u5982strace\u91c7\u7528\u7cfb\u7edf\u8c03\u7528\u52ab\u6301\u673a\u5236\uff0c\u4f1a\u5bfc\u81f4\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u589e\u52a0300%\u4ee5\u4e0a\uff0c\u800ceBPF\u901a\u8fc7\u5185\u6838\u63a2\u9488\uff08kprobe\uff09\u76f4\u63a5\u6536\u96c6\u6570\u636e\uff0c\u6027\u80fd\u635f\u8017\u63a7\u5236\u57285%\u4ee5\u5185\n<\/li>\n<li><strong>\u591a\u7ef4\u6570\u636e\u5173\u8054<\/strong>\uff1a\u4e0d\u4ec5\u80fd\u6355\u83b7syscall\u7684\u5ef6\u8fdf\u65f6\u95f4\uff0c\u8fd8\u80fd\u540c\u6b65\u83b7\u53d6\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u3001\u8c03\u7528\u6808\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u7b4928\u79cd\u5143\u6570\u636e\n<\/li>\n<li><strong>\u52a8\u6001\u89c2\u6d4b\u80fd\u529b<\/strong>\uff1a\u652f\u6301\u5728\u4e0d\u505c\u673a\u7684\u60c5\u51b5\u4e0b\u52a8\u6001\u52a0\u8f7d\u89c2\u6d4b\u811a\u672c\uff0c\u8fd9\u5bf9\u5728\u7ebf\u4e1a\u52a1\u7cfb\u7edf\u7684\u5b9e\u65f6\u8bca\u65ad\u81f3\u5173\u91cd\u8981\n<\/li>\n<\/ol>\n<h3 id=\"\u4e8c-\u7cfb\u7edf\u8c03\u7528\u89c2\u6d4b\u7684\u75db\u70b9\u7834\u89e3\">\u4e8c\u3001\u7cfb\u7edf\u8c03\u7528\u89c2\u6d4b\u7684\u75db\u70b9\u7834\u89e3<\/h3>\n<p>\u4f7f\u7528<code>strace -c<\/code>\u547d\u4ee4\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u7edf\u8ba1\u65f6\uff0c\u5de5\u7a0b\u5e08\u5e38\u9677\u5165&rdquo;\u89c2\u6d4b\u5931\u771f&rdquo;\u7684\u56f0\u5883\uff1a\u5f53\u76d1\u63a7\u4e00\u4e2a\u5904\u7406HTTP\u8bf7\u6c42\u7684\u670d\u52a1\u65f6\uff0cstrace\u81ea\u8eab\u7684\u6027\u80fd\u5f00\u9500\u53ef\u80fd\u5bfc\u81f4\u8bf7\u6c42\u5ef6\u8fdf\u4ece5ms\u6fc0\u589e\u81f320ms\u3002\u800c\u901a\u8fc7<strong>eBPF\u7684sys_exit\u8ddf\u8e2a\u70b9<\/strong>\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u8fd9\u6837\u7684\u7a0b\u5e8f\u7247\u6bb5\uff1a<\/p>\n<pre><code class=\"language-c\">SEC(&quot;tracepoint\/syscalls\/sys_exit_openat&quot;)  \r\nint trace_openat_exit(struct trace_event_raw_sys_exit* ctx) {  \r\nu64 pid = bpf_get_current_pid_tgid() &gt;&gt; 32;  \r\nu64 duration = ctx-&gt;retval;  \/\/ \u8bb0\u5f55\u7cfb\u7edf\u8c03\u7528\u8017\u65f6  \r\nbpf_map_update_elem(&amp;openat_times, &amp;pid, &amp;duration, BPF_ANY);  \r\nreturn 0;  \r\n}  \r\n<\/code><\/pre>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u901a\u8fc7BPF\u6620\u5c04\uff08map\uff09\u7ed3\u6784\uff0c\u4ee5\u8fdb\u7a0bID\u4e3a\u952e\u503c\u7cbe\u786e\u8bb0\u5f55\u6bcf\u4e2aopenat\u8c03\u7528\u7684\u8017\u65f6\uff0c\u5374\u4e0d\u4f1a\u5bf9\u76ee\u6807\u8fdb\u7a0b\u4ea7\u751f\u53ef\u89c1\u7684\u5f71\u54cd\u3002<\/p>\n<h3 id=\"\u4e09-\u4ece\u7406\u8bba\u5230\u5b9e\u8df5\u7684\u89c2\u6d4b\u4f53\u7cfb\u6784\u5efa\">\u4e09\u3001\u4ece\u7406\u8bba\u5230\u5b9e\u8df5\u7684\u89c2\u6d4b\u4f53\u7cfb\u6784\u5efa<\/h3>\n<p>\u642d\u5efaeBPF\u89c2\u6d4b\u73af\u5883\u9700\u8981\u4e09\u4e2a\u6838\u5fc3\u7ec4\u4ef6\uff1a<\/p>\n<ol>\n<li><strong>Linux\u5185\u6838\u7248\u672c\u22654.9<\/strong>\uff08\u63a8\u83505.x\u7cfb\u5217\u4ee5\u83b7\u5f97\u5b8c\u6574\u529f\u80fd\uff09\n<\/li>\n<li><strong>BCC\u5de5\u5177\u96c6<\/strong>\uff08\u63d0\u4f9bPython\u524d\u7aef\u4e0eC\u6a21\u677f\uff09\n<\/li>\n<li><strong>bpftrace\u9ad8\u9636\u8bed\u8a00<\/strong>\uff08\u9002\u5408\u5feb\u901f\u539f\u578b\u5f00\u53d1\uff09\n<\/li>\n<\/ol>\n<p>\u901a\u8fc7BCC\u7684<code>syscount-bpfcc<\/code>\u5de5\u5177\u8fdb\u884c\u5b9e\u65f6\u76d1\u63a7\uff1a<\/p>\n<pre><code class=\"language-bash\">$ syscount-bpfcc -P 1 -L  \r\nTracing syscalls... Hit Ctrl-C to end.  \r\n[16:30:45]  \r\nSYSCALL               COUNT  \r\nread                     32  \r\nwrite                    28  \r\nopenat                   15  \r\n<\/code><\/pre>\n<p>\u6b64\u5904<code>-P 1<\/code>\u8868\u793a\u6bcf\u79d2\u5237\u65b0\u7edf\u8ba1\uff0c<code>-L<\/code>\u663e\u793a\u5ef6\u8fdf\u767e\u5206\u4f4d\u6570\u3002\u6570\u636e\u663e\u793a\u5728\u89c2\u6d4b\u5468\u671f\u5185\uff0cread\u7cfb\u7edf\u8c03\u7528\u51fa\u73b0\u4e8632\u6b21\uff0c\u5176P99\u5ef6\u8fdf\u8fbe\u52302.3ms\uff0c\u8fd9\u63d0\u793a\u53ef\u80fd\u5b58\u5728\u6587\u4ef6I\/O\u74f6\u9888\u3002<\/p>\n<h3 id=\"\u56db-\u771f\u5b9e\u4e16\u754c\u7684\u6027\u80fd\u8bca\u65ad\u6848\u4f8b\">\u56db\u3001\u771f\u5b9e\u4e16\u754c\u7684\u6027\u80fd\u8bca\u65ad\u6848\u4f8b<\/h3>\n<p>\u67d0\u89c6\u9891\u8f6c\u7801\u96c6\u7fa4\u51fa\u73b0\u5468\u671f\u6027\u5ef6\u8fdf\u6bdb\u523a\uff0c\u4f20\u7edf\u76d1\u63a7\u663e\u793aCPU\u3001\u5185\u5b58\u4f7f\u7528\u6b63\u5e38\u3002\u901a\u8fc7\u90e8\u7f72<strong>eBPF\u7684syscall\u8ddf\u8e2a\u7a0b\u5e8f<\/strong>\uff0c\u53d1\u73b0\u4ee5\u4e0b\u5f02\u5e38\u6a21\u5f0f\uff1a<\/p>\n<ul>\n<li>\u6bcf5\u5206\u949f\u51fa\u73b0<code>futex<\/code>\u8c03\u7528\u6b21\u6570\u6fc0\u589e300%\n<\/li>\n<li><code>nanosleep<\/code>\u8c03\u7528\u5e73\u5747\u8017\u65f6\u4ece50\u03bcs\u98d9\u5347\u81f315ms\n<\/li>\n<li>\u5173\u8054\u7684\u8fdb\u7a0b\u8c03\u7528\u6808\u663e\u793a\u4e0eJava GC\u7ebf\u7a0b\u76f8\u5173\n<\/li>\n<\/ul>\n<p>\u8fdb\u4e00\u6b65\u5206\u6790\u53d1\u73b0\u662fJVM\u7684G1\u5783\u573e\u56de\u6536\u5668\u53c2\u6570\u914d\u7f6e\u4e0d\u5f53\uff0c\u5bfc\u81f4\u6bcf5\u5206\u949f\u89e6\u53d1\u5168\u91cfGC\u3002\u8c03\u6574<code>MaxGCPauseMillis<\/code>\u53c2\u6570\u540e\uff0c\u7cfb\u7edf\u8c03\u7528\u5ef6\u8fdf\u6ce2\u52a8\u6d88\u5931\u3002\u8fd9\u4e2a\u6848\u4f8b\u9a8c\u8bc1\u4e86<strong>\u7cfb\u7edf\u8c03\u7528\u6a21\u5f0f\u4e0e\u5e94\u7528\u7a0b\u5e8f\u884c\u4e3a\u7684\u5f3a\u5173\u8054\u6027<\/strong>\u3002<\/p>\n<h3 id=\"\u4e94-\u8fdb\u9636\u89c2\u6d4b\u7684\u516d\u79cd\u6b66\u5668\">\u4e94\u3001\u8fdb\u9636\u89c2\u6d4b\u7684\u516d\u79cd\u6b66\u5668<\/h3>\n<ol>\n<li><strong>\u52a8\u6001\u8fc7\u6ee4\u673a\u5236<\/strong>\uff1a\u5728eBPF\u7a0b\u5e8f\u4e2d\u6dfb\u52a0\u8fc7\u6ee4\u6761\u4ef6\n<\/li>\n<\/ol>\n<pre><code class=\"language-c\">if (comm == &quot;nginx&quot;) {  \/\/ \u53ea\u76d1\u63a7nginx\u8fdb\u7a0b  \r\n\/\/ \u6570\u636e\u91c7\u96c6\u903b\u8f91  \r\n}  \r\n<\/code><\/pre>\n<ol>\n<li><strong>\u706b\u7130\u56fe\u751f\u6210<\/strong>\uff1a\u4f7f\u7528BCC\u7684<code>syscall_heatmap<\/code>\u5de5\u5177\u751f\u6210\u7cfb\u7edf\u8c03\u7528\u5ef6\u8fdf\u5206\u5e03\u56fe\n<\/li>\n<li><strong>\u8de8\u5c42\u5173\u8054<\/strong>\uff1a\u5c06\u7cfb\u7edf\u8c03\u7528\u6570\u636e\u4e0ecgroup\u3001\u5bb9\u5668ID\u5173\u8054\uff0c\u5b9e\u73b0Kubernetes\u73af\u5883\u4e0b\u7684\u7cbe\u51c6\u5b9a\u4f4d\n<\/li>\n<li><strong>\u5b89\u5168\u5ba1\u8ba1<\/strong>\uff1a\u901a\u8fc7<code>execve<\/code>\u8c03\u7528\u8ddf\u8e2a\u68c0\u6d4b\u53ef\u7591\u8fdb\u7a0b\u521b\u5efa\n<\/li>\n<li><strong>\u7f51\u7edc\u65f6\u5ef6\u89e3\u8026<\/strong>\uff1a\u4f7f\u7528<code>tcptraceroute<\/code>\u533a\u5206\u7f51\u7edc\u5ef6\u8fdf\u4e0e\u7cfb\u7edf\u8c03\u7528\u5ef6\u8fdf\n<\/li>\n<li><strong>\u786c\u4ef6\u4e8b\u4ef6\u6574\u5408<\/strong>\uff1a\u8054\u5408Perf\u4e8b\u4ef6\u5206\u6790CPU\u7f13\u5b58\u547d\u4e2d\u7387\u5bf9\u7cfb\u7edf\u8c03\u7528\u7684\u5f71\u54cd\n<\/li>\n<\/ol>\n<h3 id=\"\u516d-\u6027\u80fd\u8c03\u4f18\u7684\u9ec4\u91d1\u6cd5\u5219\">\u516d\u3001\u6027\u80fd\u8c03\u4f18\u7684\u9ec4\u91d1\u6cd5\u5219<\/h3>\n<p>\u5f53\u89c2\u6d4b\u5230<code>write<\/code>\u7cfb\u7edf\u8c03\u7528\u8017\u65f6\u5f02\u5e38\u65f6\uff0c\u5e94\u8be5\u6cbf\u7740\u8fd9\u6837\u7684\u51b3\u7b56\u6811\u6392\u67e5\uff1a<\/p>\n<ol>\n<li>\u68c0\u67e5\u6587\u4ef6\u63cf\u8ff0\u7b26\u7c7b\u578b\uff08\u666e\u901a\u6587\u4ef6 vs socket\uff09\n<\/li>\n<li>\u5206\u6790vfs\u5c42\u7684<code>sync<\/code>\u64cd\u4f5c\u9891\u7387\n<\/li>\n<li>\u786e\u8ba4Page Cache\u7684\u547d\u4e2d\u7387\n<\/li>\n<li>\u68c0\u67e5\u5757\u8bbe\u5907\u7684I\/O\u8c03\u5ea6\u961f\u5217\u6df1\u5ea6\n<\/li>\n<li>\u8bc4\u4f30ext4\/xfs\u6587\u4ef6\u7cfb\u7edf\u7684\u65e5\u5fd7\u63d0\u4ea4\u7b56\u7565\n<\/li>\n<\/ol>\n<p>\u901a\u8fc7\u8fd9\u79cd\u5c42\u7ea7\u9012\u8fdb\u7684\u6392\u67e5\u65b9\u5f0f\uff0c\u67d0\u6570\u636e\u5e93\u5382\u5546\u6210\u529f\u5c06\u6279\u91cf\u63d2\u5165\u64cd\u4f5c\u7684<code>fsync<\/code>\u8c03\u7528\u8017\u65f6\u4ece\u5e73\u57478ms\u964d\u4f4e\u52301.2ms\uff0c\u6574\u4f53\u541e\u5410\u91cf\u63d0\u53474\u500d\u3002\u8fd9\u5370\u8bc1\u4e86<strong>\u57fa\u4e8eeBPF\u7684\u7cfb\u7edf\u8c03\u7528\u5206\u6790\u4e0d\u662f\u7ec8\u70b9\uff0c\u800c\u662f\u6027\u80fd\u4f18\u5316\u65c5\u7a0b\u7684\u8d77\u70b9<\/strong>\u3002<\/p>\n<p>\u968f\u7740Linux\u5185\u6838\u7684\u6301\u7eed\u6f14\u8fdb\uff0ceBPF\u6b63\u5728\u91cd\u5851\u7cfb\u7edf\u53ef\u89c2\u6d4b\u6027\u7684\u6280\u672f\u8303\u5f0f\u3002\u4ece\u7cfb\u7edf\u8c03\u7528\u5206\u6790\u8fd9\u4e2a\u5fae\u89c2\u5165\u53e3\u5207\u5165\uff0c\u6211\u4eec\u770b\u5230\u7684\u4e0d\u4ec5\u662f\u5355\u4e2a\u6280\u672f\u7ec4\u4ef6\u7684\u8fdb\u5316\uff0c\u66f4\u662f\u4e00\u4e2a\u5c5e\u4e8e\u667a\u80fd\u8fd0\u7ef4\u7684\u65b0\u7eaa\u5143\u7684\u66d9\u5149\u3002\u5f53\u6bcf\u4e2a\u7cfb\u7edf\u8c03\u7528\u90fd\u80fd\u88ab\u7cbe\u786e\u4e08\u91cf\uff0c\u5f53\u6bcf\u6beb\u79d2\u5ef6\u8fdf\u90fd\u80fd\u88ab\u6e05\u6670\u6eaf\u6e90\uff0c\u8f6f\u4ef6\u7cfb\u7edf\u7684\u6027\u80fd\u4f18\u5316\u7ec8\u5c06\u6b65\u5165\u5de5\u7a0b\u5316\u7684\u5766\u9014\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4e91\u539f\u751f\u67b6\u6784\u4e0e\u5bb9\u5668\u5316\u6280\u672f\u84ec\u52c3\u53d1\u5c55\u7684\u4eca\u5929\uff0c\u7cfb\u7edf\u8c03\u7528\u7684\u6027\u80fd\u74f6\u9888\u72b9\u5982\u9690\u85cf\u5728\u7cbe\u5bc6\u673a\u68b0\u4e2d\u7684\u5fae\u5c0f\u7802\u783e\u3002\u5f53\u5de5\u7a0b\u5e08\u4eec\u9762\u5bf9\u6bcf\u79d2\u767e\u4e07\u6b21\u8bf7\u6c42\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u65f6\uff0c\u4f20\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u5982\u540c\u7528\u653e\u5927\u955c\u89c2\u5bdf\u6d41\u661f\u96e8\u2014\u2014\u4e0d\u4ec5\u96be\u4ee5\u6355\u6349\u5173\u952e\u7ec6\u8282\uff0c\u66f4\u53ef\u80fd\u56e0\u89c2\u6d4b\u624b\u6bb5\u672c\u8eab\u7684\u6027\u80fd\u635f\u8017\u800c\u626d\u66f2\u771f\u5b9e\u573a\u666f\u3002\u6b63\u662f\u5728\u8fd9\u6837\u7684\u6280\u672f\u56f0\u5c40\u4e2d\uff0ceBPF\u6280\u672f\u72b9\u5982\u4e00\u67c4\u7cbe\u5bc6\u7684\u624b\u672f\u5200\uff0c\u4e3a\u7cfb\u7edf\u8c03\u7528\u7684\u6027\u80fd\u5206\u6790\u5f00\u8f9f\u4e86\u9769\u547d\u6027\u7684\u89c2\u6d4b\u7ef4\u5ea6\u3002 \u4e00\u3001eBPF\uff1a\u5185\u6838\u53ef\u89c2\u6d4b\u6027\u7684\u91cf\u5b50\u8dc3\u8fc1 eBPF\uff08Extended Berkeley Packet Filter\uff09\u7684\u672c\u8d28\u662f\u5b89\u5168\u7684\u5185\u6838\u7ea7\u865a\u62df\u673a\uff0c\u5176\u901a\u8fc7\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u6280\u672f\u5c06\u7528\u6237\u7f16\u5199\u7684\u7a0b\u5e8f\u6ce8\u5165\u5185\u6838\u6267\u884c\u3002\u4e0e\u9700\u8981\u91cd\u65b0\u7f16\u8bd1\u5185\u6838\u7684\u4f20\u7edf\u8c03\u8bd5\u65b9\u5f0f\u4e0d\u540c\uff0ceBPF\u7a0b\u5e8f\u9075\u5faa\u4e25\u683c\u7684\u5b89\u5168\u9a8c\u8bc1\u673a\u5236\u2014\u2014\u8fd9\u79cd\u673a\u5236\u7c7b\u4f3c\u4e8e\u673a\u573a\u7684\u5b89\u68c0\u7cfb\u7edf\uff0c\u901a\u8fc7\u9884\u5b9a\u4e49\u7684\u89c4\u5219\u786e\u4fdd\u7a0b\u5e8f\u4e0d\u4f1a\u5f15\u53d1\u5185\u6838\u5d29\u6e83\u6216\u6570\u636e\u6cc4\u9732\u3002 \u5728\u7cfb\u7edf\u8c03\u7528\u76d1\u63a7\u573a\u666f\u4e2d\uff0ceBPF\u5c55\u73b0\u51fa\u4e09\u5927\u6838\u5fc3\u4f18\u52bf\uff1a \u96f6\u91c7\u6837\u635f\u8017\uff1a\u4f20\u7edf\u5de5\u5177\u5982strace\u91c7\u7528\u7cfb\u7edf\u8c03\u7528\u52ab\u6301\u673a\u5236\uff0c\u4f1a\u5bfc\u81f4\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u589e\u52a0300%\u4ee5\u4e0a\uff0c\u800ceBPF\u901a\u8fc7\u5185\u6838\u63a2\u9488\uff08kprobe\uff09\u76f4\u63a5\u6536\u96c6\u6570\u636e\uff0c\u6027\u80fd\u635f\u8017\u63a7\u5236\u57285%\u4ee5\u5185 \u591a\u7ef4\u6570\u636e\u5173\u8054\uff1a\u4e0d\u4ec5\u80fd\u6355\u83b7syscall\u7684\u5ef6\u8fdf\u65f6\u95f4\uff0c\u8fd8\u80fd\u540c\u6b65\u83b7\u53d6\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u3001\u8c03\u7528\u6808\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u7b4928\u79cd\u5143\u6570\u636e \u52a8\u6001\u89c2\u6d4b\u80fd\u529b\uff1a\u652f\u6301\u5728\u4e0d\u505c\u673a\u7684\u60c5\u51b5\u4e0b\u52a8\u6001\u52a0\u8f7d\u89c2\u6d4b\u811a\u672c\uff0c\u8fd9\u5bf9\u5728\u7ebf\u4e1a\u52a1\u7cfb\u7edf\u7684\u5b9e\u65f6\u8bca\u65ad\u81f3\u5173\u91cd\u8981 \u4e8c\u3001\u7cfb\u7edf\u8c03\u7528\u89c2\u6d4b\u7684\u75db\u70b9\u7834\u89e3 \u4f7f\u7528strace -c\u547d\u4ee4\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u7edf\u8ba1\u65f6\uff0c\u5de5\u7a0b\u5e08\u5e38\u9677\u5165&rdquo;\u89c2\u6d4b\u5931\u771f&rdquo;\u7684\u56f0\u5883\uff1a\u5f53\u76d1\u63a7\u4e00\u4e2a\u5904\u7406HTTP\u8bf7\u6c42\u7684\u670d\u52a1\u65f6\uff0cstrace\u81ea\u8eab\u7684\u6027\u80fd\u5f00\u9500\u53ef\u80fd\u5bfc\u81f4\u8bf7\u6c42\u5ef6\u8fdf\u4ece5ms\u6fc0\u589e\u81f320ms\u3002\u800c\u901a\u8fc7eBPF\u7684sys_exit\u8ddf\u8e2a\u70b9\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u8fd9\u6837\u7684\u7a0b\u5e8f\u7247\u6bb5\uff1a SEC(&quot;tracepoint\/syscalls\/sys_exit_openat&quot;) int trace_openat_exit(struct trace_event_raw_sys_exit* ctx) { u64 pid = bpf_get_current_pid_tgid() &gt;&gt; 32; u64 duration = ctx-&gt;retval; \/\/ \u8bb0\u5f55\u7cfb\u7edf\u8c03\u7528\u8017\u65f6 bpf_map_update_elem(&amp;openat_times, &amp;pid, &amp;duration, BPF_ANY); return 0; } \u8fd9\u6bb5\u4ee3\u7801\u901a\u8fc7BPF\u6620\u5c04\uff08map\uff09\u7ed3\u6784\uff0c\u4ee5\u8fdb\u7a0bID\u4e3a\u952e\u503c\u7cbe\u786e\u8bb0\u5f55\u6bcf\u4e2aopenat\u8c03\u7528\u7684\u8017\u65f6\uff0c\u5374\u4e0d\u4f1a\u5bf9\u76ee\u6807\u8fdb\u7a0b\u4ea7\u751f\u53ef\u89c1\u7684\u5f71\u54cd\u3002 \u4e09\u3001\u4ece\u7406\u8bba\u5230\u5b9e\u8df5\u7684\u89c2\u6d4b\u4f53\u7cfb\u6784\u5efa \u642d\u5efaeBPF\u89c2\u6d4b\u73af\u5883\u9700\u8981\u4e09\u4e2a\u6838\u5fc3\u7ec4\u4ef6\uff1a Linux\u5185\u6838\u7248\u672c\u22654.9\uff08\u63a8\u83505.x\u7cfb\u5217\u4ee5\u83b7\u5f97\u5b8c\u6574\u529f\u80fd\uff09 BCC\u5de5\u5177\u96c6\uff08\u63d0\u4f9bPython\u524d\u7aef\u4e0eC\u6a21\u677f\uff09 bpftrace\u9ad8\u9636\u8bed\u8a00\uff08\u9002\u5408\u5feb\u901f\u539f\u578b\u5f00\u53d1\uff09 \u901a\u8fc7BCC\u7684syscount-bpfcc\u5de5\u5177\u8fdb\u884c\u5b9e\u65f6\u76d1\u63a7\uff1a $ syscount-bpfcc -P 1 -L Tracing syscalls&#8230; Hit Ctrl-C to [&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-37566","post","type-post","status-publish","format-standard","hentry","category-product-news"],"_links":{"self":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37566","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=37566"}],"version-history":[{"count":1,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37566\/revisions"}],"predecessor-version":[{"id":37568,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/37566\/revisions\/37568"}],"wp:attachment":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media?parent=37566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/categories?post=37566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/tags?post=37566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}