{"id":37476,"date":"2025-04-18T11:31:12","date_gmt":"2025-04-18T03:31:12","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=37476"},"modified":"2025-04-18T11:31:12","modified_gmt":"2025-04-18T03:31:12","slug":"ebpf%e5%9c%a8%e6%95%b0%e6%8d%ae%e5%ba%93%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b8%ad%e7%9a%84%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/37476.html","title":{"rendered":"eBPF\u5728\u6570\u636e\u5e93\u6027\u80fd\u4f18\u5316\u4e2d\u7684\u4f5c\u7528\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\/04\/lQ7P3tm2Pn.jpg\" alt=\"eBPF\u5728\u6570\u636e\u5e93\u6027\u80fd\u4f18\u5316\u4e2d\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\" ><\/p>\n<\/p>\n<p>\u5728\u6570\u5b57\u7ecf\u6d4e\u7684\u6d6a\u6f6e\u4e2d\uff0c\u6570\u636e\u5e93\u4f5c\u4e3a\u4f01\u4e1a\u6838\u5fc3\u4e1a\u52a1\u7684&rdquo;\u5fc3\u810f&rdquo;\uff0c\u5176\u6027\u80fd\u6ce2\u52a8\u76f4\u63a5\u5f71\u54cd\u7740\u4ea4\u6613\u54cd\u5e94\u901f\u5ea6\u3001\u7528\u6237\u4f53\u9a8c\u751a\u81f3\u5546\u4e1a\u51b3\u7b56\u6548\u7387\u3002\u5f53\u6bcf\u79d2\u767e\u4e07\u7ea7\u67e5\u8be2\u91cf\u7684\u7535\u5546\u5927\u4fc3\u906d\u9047\u6570\u636e\u5e93\u5361\u987f\uff0c\u5f53\u91d1\u878d\u4ea4\u6613\u7cfb\u7edf\u56e0\u6beb\u79d2\u7ea7\u5ef6\u8fdf\u5bfc\u81f4\u8ba2\u5355\u6d41\u5931\uff0c\u4f20\u7edf\u76d1\u63a7\u5de5\u5177\u5f80\u5f80\u50cf\u8499\u773c\u8d70\u94a2\u4e1d\u2014\u2014\u65e2\u770b\u4e0d\u6e05\u95ee\u9898\u5168\u8c8c\uff0c\u53c8\u96be\u4ee5\u53ca\u65f6\u5e72\u9884\u3002\u6b64\u65f6\uff0c\u4e00\u9879\u8d77\u6e90\u4e8eLinux\u5185\u6838\u7684\u9769\u547d\u6027\u6280\u672f\u2014\u2014<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\uff0c\u6b63\u4ee5\u98a0\u8986\u6027\u7684\u65b9\u5f0f\u91cd\u5851\u6570\u636e\u5e93\u6027\u80fd\u4f18\u5316\u7684\u6e38\u620f\u89c4\u5219\u3002<\/p>\n<h3 id=\"\u4e00-\u7a7f\u900f\u9ed1\u76d2\u7684x\u5149\u673a-ebpf\u6280\u672f\u89e3\u6790\">\u4e00\u3001\u7a7f\u900f\u9ed1\u76d2\u7684X\u5149\u673a\uff1a<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\u6280\u672f\u89e3\u6790<\/h3>\n<p>eBPF\u7684\u672c\u8d28\u662f<strong>\u5b89\u5168\u3001\u9ad8\u6548\u7684\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u6846\u67b6<\/strong>\u3002\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u65e0\u9700\u4fee\u6539\u5185\u6838\u4ee3\u7801\u6216\u52a0\u8f7d\u5185\u6838\u6a21\u5757\u7684\u524d\u63d0\u4e0b\uff0c\u5c06\u81ea\u5b9a\u4e49\u7a0b\u5e8f\u6ce8\u5165\u5230\u5185\u6838\u6267\u884c\u6d41\u4e2d\u3002\u8fd9\u79cd\u80fd\u529b\u5c31\u50cf\u4e3a\u6570\u636e\u5e93\u5f15\u64ce\u5b89\u88c5\u4e86\u4e00\u53f0\u5b9e\u65f6\u8fd0\u8f6c\u7684X\u5149\u673a\uff1a\u65e2\u80fd\u52a8\u6001\u89c2\u6d4bSQL\u89e3\u6790\u3001\u7d22\u5f15\u67e5\u8be2\u3001\u4e8b\u52a1\u9501\u7ade\u4e89\u7b49\u5173\u952e\u8def\u5f84\uff0c\u53c8\u80fd\u7cbe\u51c6\u6d4b\u91cf\u78c1\u76d8IO\u3001\u7f51\u7edc\u62a5\u6587\u3001CPU\u8c03\u5ea6\u7b49\u5e95\u5c42\u6307\u6807\u3002<\/p>\n<p>\u4e0e\u4f20\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u76f8\u6bd4\uff0ceBPF\u7684\u72ec\u7279\u4f18\u52bf\u4f53\u73b0\u5728\u4e09\u4e2a\u7ef4\u5ea6\uff1a<\/p>\n<ol>\n<li><strong>\u96f6\u4fb5\u5165\u6027<\/strong>\uff1a\u65e0\u9700\u91cd\u542f\u670d\u52a1\u6216\u4fee\u6539\u6570\u636e\u5e93\u914d\u7f6e\uff0c\u5373\u53ef\u5b9e\u73b0<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">\u5168\u94fe\u8def\u76d1\u63a7<\/a>\n<\/li>\n<li><strong>\u7eb3\u79d2\u7ea7\u7cbe\u5ea6<\/strong>\uff1a\u901a\u8fc7\u5185\u6838\u6001\u76f4\u63a5\u91c7\u6837\uff0c\u907f\u514d\u4e86\u7528\u6237\u6001\u5de5\u5177\u7684\u65f6\u95f4\u6233\u6f02\u79fb\u95ee\u9898\n<\/li>\n<li><strong>\u52a8\u6001\u8fc7\u6ee4<\/strong>\uff1a\u652f\u6301\u57fa\u4e8e\u67e5\u8be2\u8bed\u53e5\u3001\u8fde\u63a5IP\u3001\u4e8b\u52a1ID\u7b49\u7279\u5f81\u7684\u667a\u80fd\u4e8b\u4ef6\u8fc7\u6ee4\n<\/li>\n<\/ol>\n<p>\u67d0\u4e91\u6570\u636e\u5e93\u5382\u5546\u7684\u5b9e\u6d4b\u6570\u636e\u663e\u793a\uff0c\u5728MySQL 8.0\u5b9e\u4f8b\u4e2d\u4f7f\u7528eBPF\u8fdb\u884c\u67e5\u8be2\u8ddf\u8e2a\u65f6\uff0c\u6027\u80fd\u635f\u8017\u4ec5\u4e3a\u4f20\u7edfSystemTap\u65b9\u6848\u7684<strong><sup>1<\/sup>&frasl;<sub>20<\/sub><\/strong>\uff0c\u800c\u6355\u83b7\u7684\u9501\u7b49\u5f85\u4e8b\u4ef6\u6570\u91cf\u5374\u63d0\u5347\u4e86<strong>15\u500d<\/strong>\u3002<\/p>\n<h3 id=\"\u4e8c-\u6570\u636e\u5e93\u6027\u80fd\u4f18\u5316\u7684\u56db\u7ef4\u6218\u573a\">\u4e8c\u3001\u6570\u636e\u5e93\u6027\u80fd\u4f18\u5316\u7684\u56db\u7ef4\u6218\u573a<\/h3>\n<h4 id=\"1-\u53ef\u89c2\u6d4b\u6027\u9769\u547d-\u4ece\u76f2\u4eba\u6478\u8c61\u5230\u5168\u606f\u900f\u89c6\">\uff081\uff09\u53ef\u89c2\u6d4b\u6027\u9769\u547d\uff1a\u4ece\u76f2\u4eba\u6478\u8c61\u5230\u5168\u606f\u900f\u89c6<\/h4>\n<p>\u4f20\u7edf\u76d1\u63a7\u4f53\u7cfb\u5f80\u5f80\u9677\u4e8e&rdquo;\u6307\u6807\u5b64\u5c9b&rdquo;\u56f0\u5883\u2014\u2014\u6162\u67e5\u8be2\u65e5\u5fd7\u3001<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">Prometheus<\/a>\u6307\u6807\u3001APM\u8ffd\u8e2a\u6570\u636e\u5404\u81ea\u4e3a\u6218\u3002eBPF\u901a\u8fc7<strong>\u7edf\u4e00\u7684\u5185\u6838\u4e8b\u4ef6\u91c7\u96c6\u5c42<\/strong>\uff0c\u5b9e\u73b0\u4e86\u8de8\u5c42\u7ea7\u7684\u5173\u8054\u5206\u6790\uff1a<\/p>\n<ul>\n<li><strong>\u5b58\u50a8\u5f15\u64ce\u5c42<\/strong>\uff1a\u8ffd\u8e2aB+\u6811\u7d22\u5f15\u7684\u9875\u5206\u88c2\u9891\u7387\n<\/li>\n<li><strong>\u67e5\u8be2\u4f18\u5316\u5c42<\/strong>\uff1a\u8bb0\u5f55\u6267\u884c\u8ba1\u5212\u9009\u62e9\u5668\u7684\u51b3\u7b56\u8fc7\u7a0b\n<\/li>\n<li><strong>\u7f51\u7edc\u534f\u8bae\u5c42<\/strong>\uff1a\u89e3\u6790MySQL\u534f\u8bae\u4e2d\u7684\u9884\u5904\u7406\u8bed\u53e5\u6267\u884c\u60c5\u51b5\n<\/li>\n<\/ul>\n<p>\u963f\u91cc\u4e91\u6570\u636e\u5e93\u56e2\u961f\u66fe\u501f\u52a9eBPF\u7a0b\u5e8f\uff0c\u5728PolarDB\u96c6\u7fa4\u4e2d\u53d1\u73b0\u7531<strong>NUMA\u5185\u5b58\u5206\u914d\u4e0d\u5747<\/strong>\u5bfc\u81f4\u7684\u8de8\u8282\u70b9\u8bbf\u95ee\u74f6\u9888\u3002\u901a\u8fc7\u53ef\u89c6\u5316eBPF\u91c7\u96c6\u7684cache-miss\u4e8b\u4ef6\u70ed\u529b\u56fe\uff0c\u5de5\u7a0b\u5e08\u57283\u5c0f\u65f6\u5185\u5b9a\u4f4d\u5230\u7279\u5b9a\u5de5\u4f5c\u7ebf\u7a0b\u7684\u5185\u5b58\u8bbf\u95ee\u6a21\u5f0f\u5f02\u5e38\uff0c\u5c06\u6574\u4f53\u541e\u5410\u91cf\u63d0\u5347\u4e8637%\u3002<\/p>\n<h4 id=\"2-\u5ef6\u8fdf\u5206\u89e3-\u6253\u7834-\u9ed1\u76d2\u65f6\u95f4-\u7684\u9b54\u5492\">\uff082\uff09\u5ef6\u8fdf\u5206\u89e3\uff1a\u6253\u7834&rdquo;\u9ed1\u76d2\u65f6\u95f4&rdquo;\u7684\u9b54\u5492<\/h4>\n<p>\u6570\u636e\u5e93\u6027\u80fd\u95ee\u9898\u4e2d\uff0c\u6700\u68d8\u624b\u7684\u5f80\u5f80\u662f\u90a3\u4e9b\u65e0\u6cd5\u88ab\u4f20\u7edf\u5de5\u5177\u91cf\u5316\u7684&rdquo;\u9ed1\u76d2\u65f6\u95f4&rdquo;\u3002eBPF\u901a\u8fc7\u6ce8\u5165\u63a2\u9488\u5230\u5173\u952e\u4ee3\u7801\u8def\u5f84\uff0c\u5b9e\u73b0\u4e86<strong>\u5fae\u79d2\u7ea7\u7684\u5ef6\u8fdf\u5206\u89e3<\/strong>\uff1a<\/p>\n<pre><code class=\"language-c\">SEC(&quot;kprobe\/mutex_lock&quot;)  \r\nint BPF_KPROBE(mutex_lock_entry, struct mutex *lock)  \r\n{  \r\nu64 ts = bpf_ktime_get_ns();  \r\nbpf_map_update_elem(&amp;start, &amp;lock, &amp;ts, BPF_ANY);  \r\nreturn 0;  \r\n}  \r\n  \r\nSEC(&quot;kretprobe\/mutex_lock&quot;)  \r\nint BPF_KRETPROBE(mutex_lock_exit)  \r\n{  \r\nu64 *tsp = bpf_map_lookup_elem(&amp;start, &amp;lock);  \r\nif (tsp) {  \r\nu64 latency = bpf_ktime_get_ns() - *tsp;  \r\nbpf_perf_event_output(ctx, &amp;events, BPF_F_CURRENT_CPU, &amp;latency, sizeof(latency));  \r\n}  \r\nreturn 0;  \r\n}  \r\n<\/code><\/pre>\n<p>\u8fd9\u6bb5eBPF\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u6d4b\u91cf\u4e92\u65a5\u9501\u7684\u6301\u6709\u65f6\u95f4\u3002\u5f53\u67d0\u7535\u5546\u5e73\u53f0\u7528\u6b64\u65b9\u6cd5\u5206\u6790TiDB\u96c6\u7fa4\u65f6\uff0c\u53d1\u73b0\u7ea612%\u7684\u4e8b\u52a1\u5ef6\u8fdf\u6765\u81ea<strong>\u65e5\u5fd7\u5237\u76d8\u64cd\u4f5c\u7684\u9501\u7ade\u4e89<\/strong>\u3002\u901a\u8fc7\u8c03\u6574WAL\u5199\u5165\u6279\u91cf\u5927\u5c0f\uff0c\u5e73\u5747\u4e8b\u52a1\u54cd\u5e94\u65f6\u95f4\u4ece83ms\u964d\u81f349ms\u3002<\/p>\n<h4 id=\"3-\u667a\u80fd\u8c03\u5ea6-\u4ece\u88ab\u52a8\u54cd\u5e94\u5230\u9884\u6d4b\u5e72\u9884\">\uff083\uff09\u667a\u80fd\u8c03\u5ea6\uff1a\u4ece\u88ab\u52a8\u54cd\u5e94\u5230\u9884\u6d4b\u5e72\u9884<\/h4>\n<p>eBPF\u7684\u5b9e\u65f6\u4e8b\u4ef6\u5904\u7406\u80fd\u529b\uff0c\u4f7f\u5176\u6210\u4e3a\u6570\u636e\u5e93\u8d44\u6e90\u8c03\u5236\u7684&rdquo;\u667a\u6167\u4e2d\u67a2&rdquo;\u3002\u5728Kubernetes\u73af\u5883\u4e2d\uff0c\u53ef\u901a\u8fc7\u7ec4\u5408eBPF\u4e0ecgroup v2\u5b9e\u73b0\uff1a<\/p>\n<ul>\n<li><strong>IO\u4f18\u5148\u7ea7\u52a8\u6001\u8c03\u6574<\/strong>\uff1a\u5f53\u68c0\u6d4b\u5230\u6279\u91cfETL\u4efb\u52a1\u5f71\u54cd\u5728\u7ebf\u67e5\u8be2\u65f6\uff0c\u81ea\u52a8\u964d\u4f4e\u5176IO\u6743\u91cd\n<\/li>\n<li><strong>CPU\u7ed1\u6838\u4f18\u5316<\/strong>\uff1a\u6839\u636eL3\u7f13\u5b58\u547d\u4e2d\u7387\uff0c\u52a8\u6001\u8c03\u6574\u67e5\u8be2\u6267\u884c\u7ebf\u7a0b\u7684CPU\u4eb2\u548c\u6027\n<\/li>\n<li><strong>\u7f51\u7edc\u5e26\u5bbd\u4fdd\u969c<\/strong>\uff1a\u5728\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u573a\u666f\u4e0b\uff0c\u4e3a\u8de8\u8282\u70b9\u540c\u6b65\u6d41\u91cf\u9884\u7559\u6700\u5c0f\u5e26\u5bbd\n<\/li>\n<\/ul>\n<p>MongoDB 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