{"id":33316,"date":"2025-03-04T11:57:03","date_gmt":"2025-03-04T03:57:03","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=33316"},"modified":"2025-03-04T11:57:03","modified_gmt":"2025-03-04T03:57:03","slug":"%e5%a6%82%e4%bd%95%e9%80%9a%e8%bf%87ebpf%e5%ae%9e%e7%8e%b0%e9%ab%98%e6%95%88%e7%9a%84%e8%b5%84%e6%ba%90%e9%9a%94%e7%a6%bb%e5%92%8c%e8%b0%83%e5%ba%a6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/33316.html","title":{"rendered":"\u5982\u4f55\u901a\u8fc7eBPF\u5b9e\u73b0\u9ad8\u6548\u7684\u8d44\u6e90\u9694\u79bb\u548c\u8c03\u5ea6\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2025\/03\/A8ZioVc0.jpg\" alt=\"\u5982\u4f55\u901a\u8fc7eBPF\u5b9e\u73b0\u9ad8\u6548\u7684\u8d44\u6e90\u9694\u79bb\u548c\u8c03\u5ea6\uff1f\" ><\/p>\n<\/p>\n<hr>\n<p>\u5728\u4e91\u8ba1\u7b97\u4e0e\u5bb9\u5668\u5316\u6280\u672f\u9ad8\u901f\u53d1\u5c55\u7684\u4eca\u5929\uff0c\u8d44\u6e90\u9694\u79bb\u4e0e\u8c03\u5ea6\u5df2\u6210\u4e3a\u57fa\u7840\u8bbe\u65bd\u9886\u57df\u7684\u6838\u5fc3\u547d\u9898\u3002\u5f53\u6570\u767e\u4e2a\u5bb9\u5668\u5728\u540c\u4e00\u7269\u7406\u8282\u70b9\u8fd0\u884c\u65f6\uff0c\u56e0\u8d44\u6e90\u4e89\u62a2\u5bfc\u81f4\u7684\u6027\u80fd\u6296\u52a8\u53ef\u80fd\u8ba9\u5728\u7ebf\u670d\u52a1\u5ef6\u8fdf\u98d9\u534760%\u4ee5\u4e0a\uff1b\u5f53\u5173\u952e\u4e1a\u52a1\u4e0e\u6279\u5904\u7406\u4f5c\u4e1a\u5171\u4eab\u8ba1\u7b97\u8d44\u6e90\u65f6\uff0c\u7f3a\u4e4f\u7cbe\u7ec6\u5316\u7684\u8c03\u5ea6\u53ef\u80fd\u9020\u6210\u6570\u767e\u4e07\u7f8e\u5143\u7684\u7b97\u529b\u6d6a\u8d39\u3002\u9762\u5bf9\u8fd9\u4e9b\u68d8\u624b\u96be\u9898\uff0c<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\u6b63\u5728\u6380\u8d77\u4e00\u573a\u9759\u9ed8\u7684\u9769\u547d\u2014\u2014\u901a\u8fc7\u5728\u5185\u6838\u5c42\u6784\u5efa\u53ef\u7f16\u7a0b\u7684\u6570\u636e\u5e73\u9762\uff0c\u4e3a\u8d44\u6e90\u7ba1\u7406\u63d0\u4f9b\u524d\u6240\u672a\u6709\u7684\u89c2\u6d4b\u7cbe\u5ea6\u4e0e\u63a7\u5236\u7c92\u5ea6\u3002<\/p>\n<hr>\n<h3 id=\"\u4e00-ebpf-\u91cd\u65b0\u5b9a\u4e49\u5185\u6838\u53ef\u89c2\u6d4b\u6027\">\u4e00\u3001<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff1a\u91cd\u65b0\u5b9a\u4e49\u5185\u6838\u53ef\u89c2\u6d4b\u6027<\/h3>\n<p>\u4f20\u7edf\u8d44\u6e90\u9694\u79bb\u65b9\u6848\u591a\u4f9d\u8d56cgroups\u548cnamespaces\u6784\u5efa\u6c99\u7bb1\uff0c\u4f46\u8fd9\u79cd\u9759\u6001\u5212\u5206\u5c31\u50cf\u5728\u9ad8\u901f\u516c\u8def\u4e0a\u8bbe\u7f6e\u56fa\u5b9a\u8f66\u9053\uff0c\u96be\u4ee5\u5e94\u5bf9\u7a81\u53d1\u7684\u6d41\u91cf\u6d2a\u5cf0\u3002<strong>eBPF\u7684\u7a81\u7834\u6027\u5728\u4e8e\u5176\u52a8\u6001\u6ce8\u5165\u80fd\u529b<\/strong>\uff1a\u901a\u8fc7\u5b89\u5168\u9a8c\u8bc1\u7684\u5b57\u8282\u7801\u53ef\u76f4\u63a5\u8fd0\u884c\u5728\u5185\u6838\u6001\uff0c\u5b9e\u65f6\u62e6\u622a\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u5305\u3001\u8c03\u5ea6\u4e8b\u4ef6\u7b49\u5173\u952e\u8282\u70b9\u3002\u8fd9\u79cd\u7279\u6027\u4f7f\u5176\u80fd\u591f\uff1a<\/p>\n<ul>\n<li><strong>\u7ed8\u5236\u7ec6\u7c92\u5ea6\u8d44\u6e90\u753b\u50cf<\/strong>\uff1a\u5728\u5185\u5b58\u5206\u914d\uff08kmalloc\uff09\u3001CPU\u8c03\u5ea6\uff08sched_switch\uff09\u7b4950+\u5185\u6838\u51fd\u6570\u57cb\u70b9\uff0c\u7cbe\u786e\u8ffd\u8e2a\u6bcf\u4e2a\u5bb9\u5668\/\u8fdb\u7a0b\u7684\u8d44\u6e90\u6d88\u8017\u8f68\u8ff9\n<\/li>\n<li><strong>\u6784\u5efa\u81ea\u9002\u5e94\u89c2\u6d4b\u4f53\u7cfb<\/strong>\uff1a\u6839\u636e\u4e1a\u52a1\u7279\u5f81\u52a8\u6001\u52a0\u8f7d\u89c2\u6d4b\u7a0b\u5e8f\uff0c\u5982\u5728Kubernetes\u96c6\u7fa4\u4e2d\u9488\u5bf9\u6709\u72b6\u6001\u670d\u52a1\u542f\u7528\u78c1\u76d8IO\u8ffd\u8e2a\uff0c\u9488\u5bf9AI\u8bad\u7ec3\u4efb\u52a1\u5f00\u542fGPU\u663e\u5b58\u76d1\u63a7\n<\/li>\n<li><strong>\u5b9e\u73b0\u7eb3\u79d2\u7ea7\u4e8b\u4ef6\u54cd\u5e94<\/strong>\uff1a\u76f8\u6bd4\u4f20\u7edf\u7cfb\u7edf\u6bcf\u79d2\u91c7\u68371-10\u6b21\u7684\u9891\u7387\uff0ceBPF\u7a0b\u5e8f\u80fd\u4ee5\u5fae\u79d2\u7ea7\u7cbe\u5ea6\u6355\u83b7\u4e8b\u4ef6\u6d41\uff0c\u4e3a\u5b9e\u65f6\u51b3\u7b56\u63d0\u4f9b\u6570\u636e\u652f\u6491\n<\/li>\n<\/ul>\n<p>\u67d0\u5934\u90e8\u4e91\u5382\u5546\u7684\u6d4b\u8bd5\u6570\u636e\u663e\u793a\uff0c<strong>\u7ed3\u5408eBPF\u7684\u76d1\u63a7\u7cfb\u7edf\u5c06\u8d44\u6e90\u4e89\u62a2\u68c0\u6d4b\u5ef6\u8fdf\u4ece\u5206\u949f\u7ea7\u7f29\u77ed\u81f3200\u6beb\u79d2\u4ee5\u5185<\/strong>\uff0c\u8bef\u62a5\u7387\u964d\u4f4e83%\u3002<\/p>\n<hr>\n<h3 id=\"\u4e8c-\u8d44\u6e90\u9694\u79bb-\u4ece-\u56f4\u680f-\u5230-\u667a\u80fd\u5c4f\u969c\">\u4e8c\u3001\u8d44\u6e90\u9694\u79bb\uff1a\u4ece&rdquo;\u56f4\u680f&rdquo;\u5230&rdquo;\u667a\u80fd\u5c4f\u969c&rdquo;<\/h3>\n<p>\u4f20\u7edfcgroups\u901a\u8fc7\u5c42\u7ea7\u5316\u914d\u989d\u5b9e\u65bd&rdquo;\u786c\u9694\u79bb&rdquo;\uff0c\u4f46\u9762\u5bf9\u7a81\u53d1\u8d1f\u8f7d\u65f6\u5bb9\u6613\u5f15\u53d1\u997f\u6b7b\u6216\u96ea\u5d29\u6548\u5e94\u3002<strong>eBPF\u9a71\u52a8\u7684\u9694\u79bb\u673a\u5236\u5c55\u73b0\u51fa\u60ca\u4eba\u7684\u5f39\u6027<\/strong>\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u52a8\u6001\u4f18\u5148\u7ea7\u8c03\u63a7<\/strong><br \/>\n\u901a\u8fc7\u6302\u94a9<code>sched_setattr<\/code>\u7b49\u7cfb\u7edf\u8c03\u7528\uff0c\u5b9e\u65f6\u8c03\u6574\u8fdb\u7a0b\u7684\u8c03\u5ea6\u7b56\u7565\u3002\u5f53\u68c0\u6d4b\u5230\u5173\u952e\u4e1a\u52a1\u7684CPU\u5229\u7528\u7387\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u81ea\u52a8\u63d0\u5347\u5176nice\u503c\uff0c\u786e\u4fdd\u6838\u5fc3\u94fe\u8def\u65f6\u5ef6\u7a33\u5b9a\u5728SLA\u8303\u56f4\u5185\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5185\u5b58\u538b\u529b\u9884\u5224<\/strong><br \/>\n\u5728\u5185\u5b58\u5206\u914d\u8def\u5f84\uff08<code>__alloc_pages<\/code>\uff09\u6ce8\u5165BPF\u7a0b\u5e8f\uff0c\u5efa\u7acb\u5bb9\u5668\u7ea7\u7684\u5185\u5b58\u4f7f\u7528\u9884\u6d4b\u6a21\u578b\u3002\u5f53\u9884\u6d4b\u5230OOM\u98ce\u9669\u65f6\uff0c\u63d0\u524d\u89e6\u53d1\u5185\u5b58\u56de\u6536\u6216\u4f18\u96c5\u964d\u7ea7\uff0c\u907f\u514d\u66b4\u529b\u9a71\u9010\u5e26\u6765\u7684\u670d\u52a1\u4e2d\u65ad\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8de8\u7ef4\u5ea6\u8054\u9632<\/strong><br \/>\nCilium\u9879\u76ee\u5f00\u521b\u6027\u5730\u5c06eBPF\u5e94\u7528\u4e8e\u7f51\u7edc\u9694\u79bb\uff0c\u5176<strong>\u5e26\u5bbd\u52a8\u6001\u5206\u914d\u7b97\u6cd5<\/strong>\u80fd\u6839\u636e\u4e1a\u52a1\u4f18\u5148\u7ea7\u5b9e\u65f6\u8c03\u6574TC\uff08Traffic Control\uff09\u7b56\u7565\u3002\u5f53\u67d0\u5fae\u670d\u52a1\u7a81\u53d1\u6d41\u91cf\u65f6\uff0c\u81ea\u52a8\u501f\u7528\u95f2\u7f6e\u5e26\u5bbd\u914d\u989d\uff0c\u5cf0\u503c\u8fc7\u540e\u518d\u901a\u8fc7\u6e10\u8fdb\u5f0f\u5f52\u8fd8\u7ef4\u6301\u516c\u5e73\u6027\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u67d0\u7535\u5546\u5e73\u53f0\u57282023\u5e74\u5927\u4fc3\u671f\u95f4\u91c7\u7528\u8be5\u65b9\u6848\uff0c\u6838\u5fc3\u4ea4\u6613\u7cfb\u7edf\u7684TP99\u5ef6\u8fdf\u6ce2\u52a8\u4ece\u00b130%\u6536\u7a84\u5230\u00b15%\u4ee5\u5185\uff0c\u8d44\u6e90\u8d85\u5356\u7387\u63d0\u5347\u81f31:2.7\u3002<\/p>\n<hr>\n<h3 id=\"\u4e09-\u667a\u80fd\u8c03\u5ea6-\u4ece-\u76f2\u4eba\u6478\u8c61-\u5230-\u5168\u666f\u51b3\u7b56\">\u4e09\u3001\u667a\u80fd\u8c03\u5ea6\uff1a\u4ece&rdquo;\u76f2\u4eba\u6478\u8c61&rdquo;\u5230&rdquo;\u5168\u666f\u51b3\u7b56&rdquo;<\/h3>\n<p>\u4f20\u7edf\u8c03\u5ea6\u5668\u57fa\u4e8e\u6709\u9650\u7684\u8fdb\u7a0b\u72b6\u6001\u505a\u51b3\u7b56\uff0c\u5982\u540c\u4ec5\u51ed\u4f53\u6e29\u5224\u65ad\u75c5\u60c5\u3002<strong>eBPF\u8d4b\u4e88\u8c03\u5ea6\u5668360\u5ea6\u611f\u77e5\u80fd\u529b<\/strong>\uff1a<\/p>\n<ol>\n<li><strong>\u591a\u7ef4\u7279\u5f81\u63d0\u53d6<\/strong>\n<\/li>\n<\/ol>\n<ul>\n<li>\u901a\u8fc7<code>perf_event<\/code>\u5b50\u7cfb\u7edf\u91c7\u96c6L3\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u5206\u652f\u9884\u6d4b\u9519\u8bef\u7387\u7b49\u786c\u4ef6\u6307\u6807\n<\/li>\n<li>\u5229\u7528kprobe\u8ffd\u8e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u521b\u5efa\/\u5173\u95ed\u9891\u6b21\uff0c\u8bc6\u522bIO\u5bc6\u96c6\u578b\u4efb\u52a1\n<\/li>\n<li>\u6302\u94a9<code>finish_task_switch<\/code>\u7edf\u8ba1\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\uff0c\u6784\u5efa\u4efb\u52a1\u8fc1\u79fb\u6210\u672c\u6a21\u578b\n<\/li>\n<\/ul>\n<ol>\n<li><strong>\u5b9e\u65f6\u8c03\u5ea6\u4f18\u5316<\/strong><br \/>\n<strong>BSC\uff08BPF Scheduler Controller\uff09<\/strong>\u6846\u67b6\u5c55\u793a\u51fa\u663e\u8457\u4f18\u52bf\uff1a\n<\/li>\n<\/ol>\n<pre><code class=\"language-c\">\/\/ \u793a\u4f8b\uff1a\u57fa\u4e8eRTT\u7684CPU\u4eb2\u548c\u6027\u8c03\u6574  \r\nSEC(&quot;tp_btf\/sched_switch&quot;)  \r\nint BPF_PROG(handle_sched_switch, bool preempt, ...) {  \r\nu64 pid = bpf_get_current_pid_tgid();  \r\nstruct task_ctx *ctx = bpf_map_lookup_elem(&amp;task_map, &amp;pid);  \r\nif (ctx &amp;&amp; ctx-&gt;type == NETWORK_RPC) {  \r\nu64 now = bpf_ktime_get_ns();  \r\nif (now - ctx-&gt;last_run &gt; RTT_THRESHOLD) {  \r\nbpf_sched_setaffinity(pid, &amp;fast_cpu_mask);  \r\n}  \r\n}  \r\nreturn 0;  \r\n}  \r\n<\/code><\/pre>\n<p>\u8be5\u7a0b\u5e8f\u4f7f\u7f51\u7edcRPC\u4efb\u52a1\u59cb\u7ec8\u8fd0\u884c\u5728\u4f4e\u5ef6\u8fdf\u6838\u5fc3\uff0c\u67d0CDN\u5382\u5546\u5b9e\u6d4b\u964d\u4f4e\u5c3e\u5ef6\u8fdf\u8fbe40%\u3002<\/p>\n<ol>\n<li><strong>\u6df7\u5408\u8d1f\u8f7d\u8c03\u5ea6<\/strong><br \/>\n\u5728AI\u8bad\u7ec3\u4e0e\u5728\u7ebf\u670d\u52a1\u6df7\u90e8\u7684\u573a\u666f\u4e2d\uff0ceBPF\u901a\u8fc7\u5206\u6790GPU SM\u5229\u7528\u7387\u66f2\u7ebf\uff0c\u667a\u80fd\u534f\u8c03\u8ba1\u7b97\u5bc6\u96c6\u578b\u6838\u4e0e\u54cd\u5e94\u654f\u611f\u578b\u6838\u7684\u8d44\u6e90\u914d\u6bd4\u3002\u5f53\u68c0\u6d4b\u5230\u63a8\u7406\u4efb\u52a1\u79ef\u538b\u65f6\uff0c\u81ea\u52a8\u5c06\u8bad\u7ec3\u4efb\u52a1\u7684CUDA\u6d41\u4f18\u5148\u7ea7\u4e0b\u8c032\u4e2a\u7b49\u7ea7\u3002\n<\/li>\n<\/ol>\n<hr>\n<h3 id=\"\u56db-\u5b9e\u8df5\u84dd\u56fe-\u4ece\u7406\u8bba\u5230\u843d\u5730\">\u56db\u3001\u5b9e\u8df5\u84dd\u56fe\uff1a\u4ece\u7406\u8bba\u5230\u843d\u5730<\/h3>\n<ol>\n<li><strong>\u89c2\u6d4b\u5c42\u5efa\u8bbe<\/strong>\n<\/li>\n<\/ol>\n<ul>\n<li>\u4f7f\u7528<strong>bpftrace<\/strong>\u5feb\u901f\u539f\u578b\u8bbe\u8ba1\uff1a<code>bpftrace -e 'tracepoint:syscalls:sys_enter_openat { @[comm] = count(); }'<\/code>\n<\/li>\n<li>\u751f\u4ea7\u73af\u5883\u91c7\u7528<strong>BCC\u5de5\u5177\u96c6<\/strong>\uff0c\u901a\u8fc7Python\/Lua\u7f16\u5199\u524d\u7aef\u5c55\u793a\n<\/li>\n<li>\u957f\u671f\u65b9\u6848\u8fc1\u79fb\u81f3<strong>libbpf + CO-RE<\/strong>\uff08Compile Once \u2013 Run Everywhere\uff09\uff0c\u786e\u4fdd\u5185\u6838\u7248\u672c\u517c\u5bb9\u6027\n<\/li>\n<\/ul>\n<ol>\n<li><strong>\u63a7\u5236\u5c42\u67b6\u6784<\/strong>\n<\/li>\n<\/ol>\n<pre><code class=\"language-plaintext\">\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510    \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510  \r\n\u2502 \u7528\u6237\u6001\u63a7\u5236\u5668 \u2502\u25c4\u2500\u2500\u25ba\u2502 eBPF Maps    \u2502  \r\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518    \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518  \r\n\u2502                   \u2502  \r\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2500\u2500\u2510    \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2500\u2500\u2510  \r\n\u2502 <a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">Prometheus<\/a>  \u2502    \u2502 \u5185\u6838eBPF\u7a0b\u5e8f \u2502  \r\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518    \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518  \r\n<\/code><\/pre>\n<p>\u8be5\u67b6\u6784\u4e0b\uff0c\u5185\u6838\u7a0b\u5e8f\u901a\u8fc7\u73af\u5f62\u7f13\u51b2\u533a\uff08Ring Buffer\uff09\u5411\u7528\u6237\u6001\u63a8\u9001\u4e8b\u4ef6\uff0c\u63a7\u5236\u5668\u6839\u636e\u7b56\u7565\u66f4\u65b0eBPF Map\u4e2d\u7684\u8c03\u63a7\u53c2\u6570\u3002<\/p>\n<ol>\n<li><strong>\u5178\u578b\u5e94\u7528\u573a\u666f<\/strong>\n<\/li>\n<\/ol>\n<ul>\n<li><strong>Kubernetes<\/strong>\uff1aCilium\u7f51\u7edc\u7b56\u7565\u5b9e\u65bd\u8fc7\u7a0b\u4e2d\uff0ceBPF\u7a0b\u5e8f\u76f4\u63a5\u64cd\u4f5ciptables\u89c4\u5219\uff0c\u5c06\u7b56\u7565\u751f\u6548\u65f6\u95f4\u4ece\u79d2\u7ea7\u7f29\u77ed\u81f3\u6beb\u79d2\u7ea7\n<\/li>\n<li><strong>Serverless\u5e73\u53f0<\/strong>\uff1a\u6839\u636e\u51fd\u6570\u51b7\u542f\u52a8\u7279\u5f81\u52a8\u6001\u8c03\u6574\u5185\u5b58\u9884\u7559\u7b56\u7565\uff0c\u67d0FaaS\u5e73\u53f0\u5b9e\u6d4b\u964d\u4f4e\u51b7\u542f\u52a8\u738758%\n<\/li>\n<li><strong>\u6570\u636e\u5e93\u96c6\u7fa4<\/strong>\uff1a\u5b9e\u65f6\u68c0\u6d4bMySQL\u7ebf\u7a0b\u7684\u9501\u7ade\u4e89\u5f3a\u5ea6\uff0c\u81ea\u52a8\u8c03\u6574InnoDB\u7ebf\u7a0b\u5e76\u53d1\u5ea6\uff0c\u67d0\u91d1\u878d\u7cfb\u7edf\u5b9e\u73b0\u67e5\u8be2\u541e\u5410\u91cf\u63d0\u534735%\n<\/li>\n<\/ul>\n<hr>\n<h3 id=\"\u4e94-\u6311\u6218\u4e0e\u8fdb\u5316\u65b9\u5411\">\u4e94\u3001\u6311\u6218\u4e0e\u8fdb\u5316\u65b9\u5411<\/h3>\n<p>\u5c3d\u7ba1eBPF\u5c55\u73b0\u51fa\u60ca\u4eba\u6f5c\u529b\uff0c\u4f46\u5728\u751f\u4ea7\u843d\u5730\u65f6\u4ecd\u9700\u8b66\u60d5\uff1a<\/p>\n<ul>\n<li><strong>\u9a8c\u8bc1\u5668\u9650\u5236<\/strong>\uff1a\u590d\u6742\u5faa\u73af\u4e0e\u5927\u4f53\u79ef\u7a0b\u5e8f\u53ef\u80fd\u65e0\u6cd5\u901a\u8fc7\u5185\u6838\u9a8c\u8bc1\uff0c\u9700\u91c7\u7528\u5faa\u73af\u5c55\u5f00\u7b49\u4f18\u5316\u6280\u5de7\n<\/li>\n<li><strong>\u7248\u672c\u788e\u7247\u5316<\/strong>\uff1a\u4e0d\u540c\u5185\u6838\u7248\u672c\u5bf9BPF\u7279\u6027\u7684\u652f\u6301\u5dee\u5f02\uff0c\u9700\u5efa\u7acb\u5b8c\u5584\u7684\u7279\u6027<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4e91\u8ba1\u7b97\u4e0e\u5bb9\u5668\u5316\u6280\u672f\u9ad8\u901f\u53d1\u5c55\u7684\u4eca\u5929\uff0c\u8d44\u6e90\u9694\u79bb\u4e0e\u8c03\u5ea6\u5df2\u6210\u4e3a\u57fa\u7840\u8bbe\u65bd\u9886\u57df\u7684\u6838\u5fc3\u547d\u9898\u3002\u5f53\u6570\u767e\u4e2a\u5bb9\u5668\u5728\u540c\u4e00\u7269\u7406\u8282\u70b9\u8fd0\u884c\u65f6\uff0c\u56e0\u8d44\u6e90\u4e89\u62a2\u5bfc\u81f4\u7684\u6027\u80fd\u6296\u52a8\u53ef\u80fd\u8ba9\u5728\u7ebf\u670d\u52a1\u5ef6\u8fdf\u98d9\u534760%\u4ee5\u4e0a\uff1b\u5f53\u5173\u952e\u4e1a\u52a1\u4e0e\u6279\u5904\u7406\u4f5c\u4e1a\u5171\u4eab\u8ba1\u7b97\u8d44\u6e90\u65f6\uff0c\u7f3a\u4e4f\u7cbe\u7ec6\u5316\u7684\u8c03\u5ea6\u53ef\u80fd\u9020\u6210\u6570\u767e\u4e07\u7f8e\u5143\u7684\u7b97\u529b\u6d6a\u8d39\u3002\u9762\u5bf9\u8fd9\u4e9b\u68d8\u624b\u96be\u9898\uff0ceBPF\uff08Extended Berkeley Packet Filter\uff09\u6b63\u5728\u6380\u8d77\u4e00\u573a\u9759\u9ed8\u7684\u9769\u547d\u2014\u2014\u901a\u8fc7\u5728\u5185\u6838\u5c42\u6784\u5efa\u53ef\u7f16\u7a0b\u7684\u6570\u636e\u5e73\u9762\uff0c\u4e3a\u8d44\u6e90\u7ba1\u7406\u63d0\u4f9b\u524d\u6240\u672a\u6709\u7684\u89c2\u6d4b\u7cbe\u5ea6\u4e0e\u63a7\u5236\u7c92\u5ea6\u3002 \u4e00\u3001eBPF\uff1a\u91cd\u65b0\u5b9a\u4e49\u5185\u6838\u53ef\u89c2\u6d4b\u6027 \u4f20\u7edf\u8d44\u6e90\u9694\u79bb\u65b9\u6848\u591a\u4f9d\u8d56cgroups\u548cnamespaces\u6784\u5efa\u6c99\u7bb1\uff0c\u4f46\u8fd9\u79cd\u9759\u6001\u5212\u5206\u5c31\u50cf\u5728\u9ad8\u901f\u516c\u8def\u4e0a\u8bbe\u7f6e\u56fa\u5b9a\u8f66\u9053\uff0c\u96be\u4ee5\u5e94\u5bf9\u7a81\u53d1\u7684\u6d41\u91cf\u6d2a\u5cf0\u3002eBPF\u7684\u7a81\u7834\u6027\u5728\u4e8e\u5176\u52a8\u6001\u6ce8\u5165\u80fd\u529b\uff1a\u901a\u8fc7\u5b89\u5168\u9a8c\u8bc1\u7684\u5b57\u8282\u7801\u53ef\u76f4\u63a5\u8fd0\u884c\u5728\u5185\u6838\u6001\uff0c\u5b9e\u65f6\u62e6\u622a\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u5305\u3001\u8c03\u5ea6\u4e8b\u4ef6\u7b49\u5173\u952e\u8282\u70b9\u3002\u8fd9\u79cd\u7279\u6027\u4f7f\u5176\u80fd\u591f\uff1a 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\u901a\u8fc7\u6302\u94a9sched_setattr\u7b49\u7cfb\u7edf\u8c03\u7528\uff0c\u5b9e\u65f6\u8c03\u6574\u8fdb\u7a0b\u7684\u8c03\u5ea6\u7b56\u7565\u3002\u5f53\u68c0\u6d4b\u5230\u5173\u952e\u4e1a\u52a1\u7684CPU\u5229\u7528\u7387\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u81ea\u52a8\u63d0\u5347\u5176nice\u503c\uff0c\u786e\u4fdd\u6838\u5fc3\u94fe\u8def\u65f6\u5ef6\u7a33\u5b9a\u5728SLA\u8303\u56f4\u5185\u3002 \u5185\u5b58\u538b\u529b\u9884\u5224 \u5728\u5185\u5b58\u5206\u914d\u8def\u5f84\uff08__alloc_pages\uff09\u6ce8\u5165BPF\u7a0b\u5e8f\uff0c\u5efa\u7acb\u5bb9\u5668\u7ea7\u7684\u5185\u5b58\u4f7f\u7528\u9884\u6d4b\u6a21\u578b\u3002\u5f53\u9884\u6d4b\u5230OOM\u98ce\u9669\u65f6\uff0c\u63d0\u524d\u89e6\u53d1\u5185\u5b58\u56de\u6536\u6216\u4f18\u96c5\u964d\u7ea7\uff0c\u907f\u514d\u66b4\u529b\u9a71\u9010\u5e26\u6765\u7684\u670d\u52a1\u4e2d\u65ad\u3002 \u8de8\u7ef4\u5ea6\u8054\u9632 Cilium\u9879\u76ee\u5f00\u521b\u6027\u5730\u5c06eBPF\u5e94\u7528\u4e8e\u7f51\u7edc\u9694\u79bb\uff0c\u5176\u5e26\u5bbd\u52a8\u6001\u5206\u914d\u7b97\u6cd5\u80fd\u6839\u636e\u4e1a\u52a1\u4f18\u5148\u7ea7\u5b9e\u65f6\u8c03\u6574TC\uff08Traffic Control\uff09\u7b56\u7565\u3002\u5f53\u67d0\u5fae\u670d\u52a1\u7a81\u53d1\u6d41\u91cf\u65f6\uff0c\u81ea\u52a8\u501f\u7528\u95f2\u7f6e\u5e26\u5bbd\u914d\u989d\uff0c\u5cf0\u503c\u8fc7\u540e\u518d\u901a\u8fc7\u6e10\u8fdb\u5f0f\u5f52\u8fd8\u7ef4\u6301\u516c\u5e73\u6027\u3002 \u67d0\u7535\u5546\u5e73\u53f0\u57282023\u5e74\u5927\u4fc3\u671f\u95f4\u91c7\u7528\u8be5\u65b9\u6848\uff0c\u6838\u5fc3\u4ea4\u6613\u7cfb\u7edf\u7684TP99\u5ef6\u8fdf\u6ce2\u52a8\u4ece\u00b130%\u6536\u7a84\u5230\u00b15%\u4ee5\u5185\uff0c\u8d44\u6e90\u8d85\u5356\u7387\u63d0\u5347\u81f31:2.7\u3002 \u4e09\u3001\u667a\u80fd\u8c03\u5ea6\uff1a\u4ece&rdquo;\u76f2\u4eba\u6478\u8c61&rdquo;\u5230&rdquo;\u5168\u666f\u51b3\u7b56&rdquo; \u4f20\u7edf\u8c03\u5ea6\u5668\u57fa\u4e8e\u6709\u9650\u7684\u8fdb\u7a0b\u72b6\u6001\u505a\u51b3\u7b56\uff0c\u5982\u540c\u4ec5\u51ed\u4f53\u6e29\u5224\u65ad\u75c5\u60c5\u3002eBPF\u8d4b\u4e88\u8c03\u5ea6\u5668360\u5ea6\u611f\u77e5\u80fd\u529b\uff1a \u591a\u7ef4\u7279\u5f81\u63d0\u53d6 \u901a\u8fc7perf_event\u5b50\u7cfb\u7edf\u91c7\u96c6L3\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u5206\u652f\u9884\u6d4b\u9519\u8bef\u7387\u7b49\u786c\u4ef6\u6307\u6807 \u5229\u7528kprobe\u8ffd\u8e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u521b\u5efa\/\u5173\u95ed\u9891\u6b21\uff0c\u8bc6\u522bIO\u5bc6\u96c6\u578b\u4efb\u52a1 \u6302\u94a9finish_task_switch\u7edf\u8ba1\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\uff0c\u6784\u5efa\u4efb\u52a1\u8fc1\u79fb\u6210\u672c\u6a21\u578b \u5b9e\u65f6\u8c03\u5ea6\u4f18\u5316 BSC\uff08BPF Scheduler Controller\uff09\u6846\u67b6\u5c55\u793a\u51fa\u663e\u8457\u4f18\u52bf\uff1a \/\/ \u793a\u4f8b\uff1a\u57fa\u4e8eRTT\u7684CPU\u4eb2\u548c\u6027\u8c03\u6574 SEC(&quot;tp_btf\/sched_switch&quot;) int BPF_PROG(handle_sched_switch, bool preempt, &#8230;) { u64 pid = bpf_get_current_pid_tgid(); struct task_ctx *ctx = bpf_map_lookup_elem(&amp;task_map, &amp;pid); if (ctx &amp;&amp; ctx-&gt;type == NETWORK_RPC) [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":33317,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-33316","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-news"],"_links":{"self":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/33316","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=33316"}],"version-history":[{"count":1,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/33316\/revisions"}],"predecessor-version":[{"id":33318,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/33316\/revisions\/33318"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media\/33317"}],"wp:attachment":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media?parent=33316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/categories?post=33316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/tags?post=33316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}