{"id":36389,"date":"2025-04-11T14:11:06","date_gmt":"2025-04-11T06:11:06","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=36389"},"modified":"2025-04-11T14:11:06","modified_gmt":"2025-04-11T06:11:06","slug":"ebpf%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e9%ab%98%e6%95%88%e7%9a%84%e5%86%85%e5%ad%98%e5%88%86%e6%9e%90%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/36389.html","title":{"rendered":"eBPF\u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5185\u5b58\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\/i2653pLVf.jpg\" alt=\"eBPF\u5982\u4f55\u5b9e\u73b0\u9ad8\u6548\u7684\u5185\u5b58\u5206\u6790\uff1f\" ><\/p>\n<\/p>\n<p><strong>\u3010\u524d\u8a00\u3011<\/strong><br \/>\n\u5728\u73b0\u4ee3\u4e91\u539f\u751f\u4e0e\u53ef\u89c2\u6d4b\u6027\u6280\u672f\u5feb\u901f\u6f14\u8fdb\u7684\u80cc\u666f\u4e0b\uff0c\u7cfb\u7edf\u8d44\u6e90\u7684\u7cbe\u7ec6\u5316\u76d1\u63a7\u6210\u4e3a\u5f00\u53d1\u8005\u4e0e\u8fd0\u7ef4\u56e2\u961f\u7684\u6838\u5fc3\u8bc9\u6c42\u3002\u5185\u5b58\u4f5c\u4e3a\u627f\u8f7d\u5e94\u7528\u8fd0\u884c\u7684\u6838\u5fc3\u8d44\u6e90\uff0c\u5176\u4f7f\u7528\u6548\u7387\u76f4\u63a5\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\u4e0e\u7a33\u5b9a\u6027\u3002\u7136\u800c\uff0c\u4f20\u7edf\u7684\u5185\u5b58\u5206\u6790\u5de5\u5177\u5f80\u5f80\u9762\u4e34<strong>\u6027\u80fd\u635f\u8017\u9ad8<\/strong>\u3001<strong>\u6570\u636e\u9897\u7c92\u5ea6\u7c97\u7cd9<\/strong>\u3001<strong>\u52a8\u6001\u8ffd\u8e2a\u80fd\u529b\u5f31<\/strong>\u7b49\u75db\u70b9\u3002\u5f53\u5f00\u53d1\u8005\u8bd5\u56fe\u6df1\u5165\u5185\u6838\u6001\u5206\u6790\u5185\u5b58\u5206\u914d\u884c\u4e3a\u65f6\uff0c\u5de5\u5177\u7684\u5c40\u9650\u6027\u66f4\u4e3a\u660e\u663e\u3002\u6b64\u65f6\uff0c<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\u51ed\u501f\u5176<strong>\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u6027<\/strong>\u4e0e<strong>\u6781\u4f4e\u7684\u5f00\u9500\u7279\u6027<\/strong>\uff0c\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u5185\u5b58\u5206\u6790\u7684\u6548\u7387\u8fb9\u754c\u3002<\/p>\n<hr>\n<h3 id=\"\u4e00-ebpf\u6280\u672f\u5185\u6838-\u4ece\u6570\u636e\u5305\u8fc7\u6ee4\u5230\u901a\u7528\u5185\u6838\u53ef\u7f16\u7a0b\">\u4e00\u3001<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\u6280\u672f\u5185\u6838\uff1a\u4ece\u6570\u636e\u5305\u8fc7\u6ee4\u5230\u901a\u7528\u5185\u6838\u53ef\u7f16\u7a0b<\/h3>\n<p>eBPF\u6700\u521d\u8bbe\u8ba1\u4e3a\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\u5de5\u5177\uff0c\u4f46\u5176\u6f14\u8fdb\u5f7b\u5e95\u7a81\u7834\u4e86\u4f20\u7edf\u8fb9\u754c\u3002\u901a\u8fc7\u5728\u5185\u6838\u4e2d\u6784\u5efa<strong>\u5b89\u5168\u7684\u865a\u62df\u673a\u73af\u5883<\/strong>\uff0ceBPF\u5141\u8bb8\u7528\u6237\u5728\u4e0d\u4fee\u6539\u5185\u6838\u6e90\u7801\u6216\u91cd\u542f\u7cfb\u7edf\u7684\u524d\u63d0\u4e0b\uff0c\u52a8\u6001\u52a0\u8f7d\u81ea\u5b9a\u4e49\u7a0b\u5e8f\u3002\u8fd9\u79cd\u80fd\u529b\u4f7f\u5176\u5929\u7136\u9002\u914d<strong>\u5b9e\u65f6\u5185\u5b58\u5206\u6790<\/strong>\u7684\u9700\u6c42\uff1a<\/p>\n<ol>\n<li><strong>\u96f6\u62f7\u8d1d\u6570\u636e\u91c7\u96c6<\/strong>\uff1aeBPF\u7a0b\u5e8f\u53ef\u76f4\u63a5\u8bbf\u95ee\u5185\u6838\u5185\u5b58\u4e2d\u7684\u6570\u636e\u7ed3\u6784\uff08\u5982<code>slab\u5206\u914d\u5668<\/code>\u3001<code>page fault\u8ba1\u6570\u5668<\/code>\uff09\uff0c\u65e0\u9700\u5c06\u6570\u636e\u590d\u5236\u5230\u7528\u6237\u6001\uff0c\u663e\u8457\u964d\u4f4e\u4e86\u5206\u6790\u5ef6\u8fdf\u3002\n<\/li>\n<li><strong>\u7cbe\u51c6\u4e8b\u4ef6\u89e6\u53d1<\/strong>\uff1a\u901a\u8fc7\u6302\u94a9\uff08hook\uff09\u5173\u952e\u5185\u6838\u51fd\u6570\uff08\u5982<code>kmalloc<\/code>\u3001<code>kfree<\/code>\uff09\uff0ceBPF\u80fd\u591f\u5728\u5185\u5b58\u5206\u914d\/\u91ca\u653e\u7684\u77ac\u95f4\u6355\u83b7\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u5b9e\u73b0<strong>\u7eb3\u79d2\u7ea7\u4e8b\u4ef6\u54cd\u5e94<\/strong>\u3002\n<\/li>\n<li><strong>\u4f4e\u5f00\u9500\u8bbe\u8ba1<\/strong>\uff1aeBPF\u865a\u62df\u673a\u901a\u8fc7\u4e25\u683c\u7684\u9a8c\u8bc1\u673a\u5236\u786e\u4fdd\u7a0b\u5e8f\u5b89\u5168\u6027\uff0c\u540c\u65f6\u91c7\u7528JIT\u7f16\u8bd1\u6280\u672f\u5c06\u5b57\u8282\u7801\u8f6c\u6362\u4e3a\u673a\u5668\u7801\uff0c\u8fd0\u884c\u6548\u7387\u63a5\u8fd1\u539f\u751f\u4ee3\u7801\u3002\n<\/li>\n<\/ol>\n<p><em>\u8fd9\u4e00\u6280\u672f\u7279\u6027\u4f7feBPF\u6210\u4e3a\u5185\u5b58\u6cc4\u6f0f\u68c0\u6d4b\u3001\u5185\u5b58\u788e\u7247\u5316\u5206\u6790\u7b49\u9ad8\u7cbe\u5ea6\u573a\u666f\u7684\u7406\u60f3\u5de5\u5177\u3002<\/em><\/p>\n<hr>\n<h3 id=\"\u4e8c-ebpf\u5185\u5b58\u5206\u6790\u7684\u6838\u5fc3\u4f18\u52bf\">\u4e8c\u3001eBPF\u5185\u5b58\u5206\u6790\u7684\u6838\u5fc3\u4f18\u52bf<\/h3>\n<h4 id=\"1-\u7ec6\u7c92\u5ea6\u6570\u636e\u6355\u83b7\u80fd\u529b\"><strong>1. \u7ec6\u7c92\u5ea6\u6570\u636e\u6355\u83b7\u80fd\u529b<\/strong><\/h4>\n<p>\u4f20\u7edf\u5de5\u5177\uff08\u5982<code>Valgrind<\/code>\uff09\u4f9d\u8d56\u63d2\u6869\u6216\u91c7\u6837\uff0c\u96be\u4ee5\u8986\u76d6\u77ed\u751f\u547d\u5468\u671f\u5185\u5b58\u5bf9\u8c61\u7684\u5b9e\u65f6\u884c\u4e3a\u3002\u800ceBPF\u901a\u8fc7\u6302\u94a9<strong>\u5185\u5b58\u5206\u914d\u8def\u5f84<\/strong>\uff0c\u53ef\u8bb0\u5f55\u6bcf\u6b21\u5206\u914d\u7684\u8c03\u7528\u6808\u3001\u8fdb\u7a0bID\u3001\u5206\u914d\u5927\u5c0f\u7b49\u5143\u6570\u636e\u3002\u4f8b\u5982\uff0c<code>BCC\u5de5\u5177\u96c6<\/code>\u4e2d\u7684<code>memleak<\/code>\u5de5\u5177\uff0c\u6b63\u662f\u901a\u8fc7\u7edf\u8ba1\u672a\u91ca\u653e\u7684\u5185\u5b58\u5757\u53ca\u5176\u8c03\u7528\u6808\uff0c\u5b9e\u73b0\u6cc4\u6f0f\u70b9\u7cbe\u51c6\u5b9a\u4f4d\u3002<\/p>\n<h4 id=\"2-\u52a8\u6001\u53ef\u89c2\u6d4b\u6027\u4e0e\u65e0\u4fb5\u5165\u6027\"><strong>2. \u52a8\u6001\u53ef\u89c2\u6d4b\u6027\u4e0e\u65e0\u4fb5\u5165\u6027<\/strong><\/h4>\n<p>\u5728<strong>\u751f\u4ea7\u73af\u5883<\/strong>\u4e2d\uff0c\u91cd\u542f\u670d\u52a1\u6216\u5b89\u88c5\u8c03\u8bd5\u5de5\u5177\u53ef\u80fd\u5f15\u5165\u98ce\u9669\u3002eBPF\u7684<strong>\u52a8\u6001\u52a0\u8f7d\u673a\u5236<\/strong>\u5f7b\u5e95\u89c4\u907f\u4e86\u8fd9\u4e00\u95ee\u9898\uff1a\u5f00\u53d1\u8005\u53ef\u901a\u8fc7<code>bpftrace<\/code>\u5373\u65f6\u7f16\u5199\u811a\u672c\uff0c\u5206\u6790\u7279\u5b9a\u8fdb\u7a0b\u7684\u5185\u5b58\u884c\u4e3a\uff0c\u6216\u5728\u5185\u5b58\u4f7f\u7528\u8fbe\u5230\u9608\u503c\u65f6\u89e6\u53d1\u544a\u8b66\u3002<\/p>\n<h4 id=\"3-\u591a\u7ef4\u6570\u636e\u5173\u8054\u5206\u6790\"><strong>3. \u591a\u7ef4\u6570\u636e\u5173\u8054\u5206\u6790<\/strong><\/h4>\n<p>eBPF\u7a0b\u5e8f\u4e0d\u4ec5\u80fd\u8bb0\u5f55\u5185\u5b58\u4e8b\u4ef6\uff0c\u8fd8\u53ef\u4e0eCPU\u8c03\u5ea6\u3001\u6587\u4ef6I\/O\u7b49\u7cfb\u7edf\u884c\u4e3a\u5173\u8054\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u5173\u8054<code>page cache<\/code>\u547d\u4e2d\u7387\u4e0e\u5e94\u7528\u7a0b\u5e8f\u7684\u5ef6\u8fdf\u6570\u636e\uff0c\u53ef\u5feb\u901f\u5b9a\u4f4d\u56e0\u5185\u5b58\u4e0d\u8db3\u5bfc\u81f4\u7684\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<hr>\n<h3 id=\"\u4e09-\u9ad8\u6548\u5185\u5b58\u5206\u6790\u7684\u5b9e\u73b0\u8def\u5f84\">\u4e09\u3001\u9ad8\u6548\u5185\u5b58\u5206\u6790\u7684\u5b9e\u73b0\u8def\u5f84<\/h3>\n<h4 id=\"\u6b65\u9aa41-\u9009\u62e9\u5408\u9002\u7684\u5185\u6838\u6302\u94a9\u70b9\"><strong>\u6b65\u9aa41\uff1a\u9009\u62e9\u5408\u9002\u7684\u5185\u6838\u6302\u94a9\u70b9<\/strong><\/h4>\n<p>eBPF\u7684\u5185\u5b58\u5206\u6790\u6548\u7387\u4f9d\u8d56\u4e8e\u6302\u94a9\u70b9\u7684\u9009\u62e9\uff1a<\/p>\n<ul>\n<li><strong>\u5185\u5b58\u5206\u914d\u5668\u5c42<\/strong>\uff1a\u6302\u94a9<code>kmalloc<\/code>\/<code>vmalloc<\/code>\u7cfb\u5217\u51fd\u6570\uff0c\u8ffd\u8e2a\u5185\u6838\u5bf9\u8c61\u5206\u914d\uff1b\n<\/li>\n<li><strong>\u7528\u6237\u6001\u5185\u5b58\u7ba1\u7406<\/strong>\uff1a\u76d1\u63a7<code>brk<\/code>\u3001<code>mmap<\/code>\u7cfb\u7edf\u8c03\u7528\uff0c\u5206\u6790\u5806\u4e0e\u6587\u4ef6\u6620\u5c04\u5185\u5b58\u7684\u53d8\u5316\uff1b\n<\/li>\n<li><strong>\u9875\u9519\u8bef\u5904\u7406<\/strong>\uff1a\u901a\u8fc7<code>page_fault<\/code>\u4e8b\u4ef6\u7edf\u8ba1\u7f3a\u9875\u5f02\u5e38\uff0c\u8bc6\u522b\u5185\u5b58\u8bbf\u95ee\u6a21\u5f0f\u5f02\u5e38\u3002\n<\/li>\n<\/ul>\n<h4 id=\"\u6b65\u9aa42-\u8bbe\u8ba1\u4f4e\u5f00\u9500\u7684\u6570\u636e\u5904\u7406\u6d41\u6c34\u7ebf\"><strong>\u6b65\u9aa42\uff1a\u8bbe\u8ba1\u4f4e\u5f00\u9500\u7684\u6570\u636e\u5904\u7406\u6d41\u6c34\u7ebf<\/strong><\/h4>\n<p>\u4e3a\u51cf\u5c11\u5185\u6838\u5230\u7528\u6237\u6001\u7684\u6570\u636e\u4f20\u8f93\u5f00\u9500\uff0ceBPF\u91c7\u7528\u4ee5\u4e0b\u4f18\u5316\uff1a<\/p>\n<ul>\n<li><strong>\u805a\u5408\u7edf\u8ba1<\/strong>\uff1a\u5728\u5185\u6838\u4e2d\u9884\u8ba1\u7b97\u76f4\u65b9\u56fe\u3001\u8ba1\u6570\u5668\u7b49\u6307\u6807\uff0c\u4ec5\u8f93\u51fa\u7ed3\u679c\u800c\u975e\u539f\u59cb\u4e8b\u4ef6\uff1b\n<\/li>\n<li><strong>\u9ad8\u6548\u7f13\u51b2\u533a<\/strong>\uff1a\u4f7f\u7528<code>perf_event<\/code>\u6216<code>BPF\u73af\u5f62\u7f13\u51b2\u533a<\/code>\uff08Linux 5.8+\uff09\u4f20\u9012\u6570\u636e\uff0c\u907f\u514d\u9501\u7ade\u4e89\u4e0e\u5185\u5b58\u62f7\u8d1d\uff1b\n<\/li>\n<li><strong>\u667a\u80fd\u8fc7\u6ee4<\/strong>\uff1a\u901a\u8fc7eBPF\u7a0b\u5e8f\u7684\u9884\u5904\u7406\u903b\u8f91\uff0c\u4e22\u5f03\u65e0\u5173\u4e8b\u4ef6\uff08\u5982\u8fc7\u6ee4\u7279\u5b9a\u8fdb\u7a0b\u6216\u5206\u914d\u5927\u5c0f\uff09\u3002\n<\/li>\n<\/ul>\n<h4 id=\"\u6b65\u9aa43-\u53ef\u89c6\u5316\u4e0e\u81ea\u52a8\u5316\u54cd\u5e94\"><strong>\u6b65\u9aa43\uff1a\u53ef\u89c6\u5316\u4e0e\u81ea\u52a8\u5316\u54cd\u5e94<\/strong><\/h4>\n<p>\u7ed3\u5408<code>Grafana<\/code>\u3001<code><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">Prometheus<\/a><\/code>\u7b49\u53ef\u89c6\u5316\u5de5\u5177\uff0c\u53ef\u5c06eBPF\u91c7\u96c6\u7684\u539f\u59cb\u6570\u636e\u8f6c\u5316\u4e3a\u5185\u5b58\u4f7f\u7528\u70ed\u56fe\u3001\u6cc4\u6f0f\u8d8b\u52bf\u66f2\u7ebf\u7b49\u76f4\u89c2\u89c6\u56fe\u3002\u66f4\u8fdb\u4e00\u6b65\uff0c\u901a\u8fc7\u96c6\u6210\u81ea\u52a8\u5316\u7cfb\u7edf\uff0c\u53ef\u5728\u68c0\u6d4b\u5230\u5185\u5b58\u6cc4\u6f0f\u65f6\u81ea\u52a8\u751f\u6210\u706b\u7130\u56fe\u6216\u89e6\u53d1\u5783\u573e\u56de\u6536\u673a\u5236\u3002<\/p>\n<hr>\n<h3 id=\"\u56db-\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u6848\u4f8b\u5206\u6790\">\u56db\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u6848\u4f8b\u5206\u6790<\/h3>\n<h4 id=\"\u573a\u666f1-\u5bb9\u5668\u73af\u5883\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\u8ffd\u8e2a\"><strong>\u573a\u666f1\uff1a\u5bb9\u5668\u73af\u5883\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\u8ffd\u8e2a<\/strong><\/h4>\n<p>\u67d0\u4e91\u670d\u52a1\u5546\u53d1\u73b0\u5176Kubernetes\u96c6\u7fa4\u9891\u7e41\u51fa\u73b0\u5bb9\u5668OOM\uff08\u5185\u5b58\u6ea2\u51fa\uff09\u95ee\u9898\u3002\u4f20\u7edf\u5de5\u5177\u56e0\u5bb9\u5668\u9694\u79bb\u6027\u96be\u4ee5\u6df1\u5165\u5206\u6790\uff0c\u800c\u901a\u8fc7\u90e8\u7f72\u57fa\u4e8eeBPF\u7684\u76d1\u63a7\u4ee3\u7406\uff0c\u56e2\u961f\u5feb\u901f\u9501\u5b9a\u4e86\u67d0\u4e2a\u672a\u91ca\u653e<code>JSON\u89e3\u6790\u7f13\u51b2\u533a<\/code>\u7684\u5fae\u670d\u52a1\uff0c\u4fee\u590d\u540e\u5185\u5b58\u4f7f\u7528\u7387\u4e0b\u964d40%\u3002<\/p>\n<h4 id=\"\u573a\u666f2-jvm\u5806\u5916\u5185\u5b58\u6cc4\u6f0f\u6392\u67e5\"><strong>\u573a\u666f2\uff1aJVM\u5806\u5916\u5185\u5b58\u6cc4\u6f0f\u6392\u67e5<\/strong><\/h4>\n<p>Java\u5e94\u7528\u7684\u5806\u5916\u5185\u5b58\uff08\u5982<code>DirectByteBuffer<\/code>\uff09\u6cc4\u6f0f\u662f\u5e38\u89c1\u96be\u9898\u3002\u501f\u52a9eBPF\u6302\u94a9<code>malloc<\/code>\u4e0e<code>free<\/code>\u51fd\u6570\uff0c\u5f00\u53d1\u8005\u53ef\u76f4\u63a5\u8ffd\u8e2aNative\u5185\u5b58\u7684\u5206\u914d\u6765\u6e90\uff0c\u7ed3\u5408<code>perf<\/code>\u751f\u6210\u7684\u706b\u7130\u56fe\uff0c\u5b9a\u4f4d\u5230\u4e00\u5904\u672a\u5173\u95ed\u7684<code>JNI\u5e93\u6587\u4ef6\u53e5\u67c4<\/code>\u3002<\/p>\n<h4 id=\"\u573a\u666f3-\u5185\u6838\u5185\u5b58\u788e\u7247\u4f18\u5316\"><strong>\u573a\u666f3\uff1a\u5185\u6838\u5185\u5b58\u788e\u7247\u4f18\u5316<\/strong><\/h4>\n<p>\u67d0\u6570\u636e\u5e93\u5382\u5546\u901a\u8fc7eBPF\u76d1\u63a7<code>slab\u5206\u914d\u5668<\/code>\u7684\u788e\u7247\u5316\u7a0b\u5ea6\uff0c\u53d1\u73b0\u9891\u7e41\u7684\u5c0f\u5757\u5185\u5b58\u8bf7\u6c42\u5bfc\u81f4\u9875\u9762\u5229\u7528\u7387\u4f4e\u4e8e60%\u3002\u901a\u8fc7\u8c03\u6574\u5185\u5b58\u6c60\u7684\u5206\u914d\u7b56\u7565\uff0c\u6210\u529f\u5c06TPS\uff08\u6bcf\u79d2\u4e8b\u52a1\u6570\uff09\u63d0\u534722%\u3002<\/p>\n<hr>\n<h3 id=\"\u4e94-\u6311\u6218\u4e0e\u672a\u6765\u6f14\u8fdb\">\u4e94\u3001\u6311\u6218\u4e0e\u672a\u6765\u6f14\u8fdb<\/h3>\n<p>\u5c3d\u7ba1eBPF\u5728\u5185\u5b58\u5206\u6790\u4e2d\u8868\u73b0\u5353\u8d8a\uff0c\u4ecd\u9700\u5e94\u5bf9\u4ee5\u4e0b\u6311\u6218\uff1a<\/p>\n<ul>\n<li><strong>\u5185\u6838\u7248\u672c\u788e\u7247\u5316<\/strong>\uff1a\u90e8\u5206eBPF\u7279\u6027\u9700\u8f83\u65b0\u5185\u6838\uff08\u59825.10+\uff09\uff0c\u4f01\u4e1a\u751f\u4ea7\u73af\u5883\u53ef\u80fd\u65e0\u6cd5\u5feb\u901f\u5347\u7ea7\uff1b\n<\/li>\n<li><strong>\u590d\u6742\u573a\u666f\u7684\u6570\u636e\u5173\u8054<\/strong>\uff1a\u8de8\u5b50\u7cfb\u7edf\uff08\u5982\u5185\u5b58\u4e0e\u7f51\u7edc\uff09\u7684<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">\u6839\u56e0\u5206\u6790<\/a>\u4ecd\u9700\u7ed3\u5408\u5176\u4ed6\u89c2\u6d4b\u6570\u636e\uff1b\n<\/li>\n<li><strong>\u5b89\u5168\u4e0e\u6027\u80fd\u7684\u5e73\u8861<\/strong>\uff1a\u9ad8\u9891\u4e8b\u4ef6\uff08\u5982\u6bcf\u79d2\u767e\u4e07\u6b21\u5185\u5b58\u5206\u914d\uff09\u53ef\u80fd\u5bfc\u81f4\u7f13\u51b2\u533a\u6ea2\u51fa\u6216CPU\u5360\u7528\u8fc7\u9ad8\u3002\n<\/li>\n<\/ul>\n<p>\u968f\u7740<strong>eBPF\u751f\u6001\u5de5\u5177\u94fe<\/strong>\uff08\u5982<code>Libbpf<\/code>\u3001<code>CO-RE<\/code>\uff09\u7684\u6210\u719f\uff0c\u4ee5\u53ca\u786c\u4ef6\u5378\u8f7d\u6280\u672f\u7684\u5f15\u5165\uff0c\u672a\u6765eBPF\u6216\u5c06\u6210\u4e3a\u5185\u5b58\u5206\u6790\u7684\u4e8b\u5b9e\u6807\u51c6\uff0c\u751a\u81f3\u63a8\u52a8Linux\u5185\u6838\u5411\u201c\u5b8c\u5168\u53ef\u89c2\u6d4b\u6027\u201d\u67b6\u6784\u6f14\u8fdb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3010\u524d\u8a00\u3011 \u5728\u73b0\u4ee3\u4e91\u539f\u751f\u4e0e\u53ef\u89c2\u6d4b\u6027\u6280\u672f\u5feb\u901f\u6f14\u8fdb\u7684\u80cc\u666f\u4e0b\uff0c\u7cfb\u7edf\u8d44\u6e90\u7684\u7cbe\u7ec6\u5316\u76d1\u63a7\u6210\u4e3a\u5f00\u53d1\u8005\u4e0e\u8fd0\u7ef4\u56e2\u961f\u7684\u6838\u5fc3\u8bc9\u6c42\u3002\u5185\u5b58\u4f5c\u4e3a\u627f\u8f7d\u5e94\u7528\u8fd0\u884c\u7684\u6838\u5fc3\u8d44\u6e90\uff0c\u5176\u4f7f\u7528\u6548\u7387\u76f4\u63a5\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\u4e0e\u7a33\u5b9a\u6027\u3002\u7136\u800c\uff0c\u4f20\u7edf\u7684\u5185\u5b58\u5206\u6790\u5de5\u5177\u5f80\u5f80\u9762\u4e34\u6027\u80fd\u635f\u8017\u9ad8\u3001\u6570\u636e\u9897\u7c92\u5ea6\u7c97\u7cd9\u3001\u52a8\u6001\u8ffd\u8e2a\u80fd\u529b\u5f31\u7b49\u75db\u70b9\u3002\u5f53\u5f00\u53d1\u8005\u8bd5\u56fe\u6df1\u5165\u5185\u6838\u6001\u5206\u6790\u5185\u5b58\u5206\u914d\u884c\u4e3a\u65f6\uff0c\u5de5\u5177\u7684\u5c40\u9650\u6027\u66f4\u4e3a\u660e\u663e\u3002\u6b64\u65f6\uff0ceBPF\uff08Extended Berkeley Packet Filter\uff09\u51ed\u501f\u5176\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u6027\u4e0e\u6781\u4f4e\u7684\u5f00\u9500\u7279\u6027\uff0c\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u5185\u5b58\u5206\u6790\u7684\u6548\u7387\u8fb9\u754c\u3002 \u4e00\u3001eBPF\u6280\u672f\u5185\u6838\uff1a\u4ece\u6570\u636e\u5305\u8fc7\u6ee4\u5230\u901a\u7528\u5185\u6838\u53ef\u7f16\u7a0b eBPF\u6700\u521d\u8bbe\u8ba1\u4e3a\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\u5de5\u5177\uff0c\u4f46\u5176\u6f14\u8fdb\u5f7b\u5e95\u7a81\u7834\u4e86\u4f20\u7edf\u8fb9\u754c\u3002\u901a\u8fc7\u5728\u5185\u6838\u4e2d\u6784\u5efa\u5b89\u5168\u7684\u865a\u62df\u673a\u73af\u5883\uff0ceBPF\u5141\u8bb8\u7528\u6237\u5728\u4e0d\u4fee\u6539\u5185\u6838\u6e90\u7801\u6216\u91cd\u542f\u7cfb\u7edf\u7684\u524d\u63d0\u4e0b\uff0c\u52a8\u6001\u52a0\u8f7d\u81ea\u5b9a\u4e49\u7a0b\u5e8f\u3002\u8fd9\u79cd\u80fd\u529b\u4f7f\u5176\u5929\u7136\u9002\u914d\u5b9e\u65f6\u5185\u5b58\u5206\u6790\u7684\u9700\u6c42\uff1a \u96f6\u62f7\u8d1d\u6570\u636e\u91c7\u96c6\uff1aeBPF\u7a0b\u5e8f\u53ef\u76f4\u63a5\u8bbf\u95ee\u5185\u6838\u5185\u5b58\u4e2d\u7684\u6570\u636e\u7ed3\u6784\uff08\u5982slab\u5206\u914d\u5668\u3001page fault\u8ba1\u6570\u5668\uff09\uff0c\u65e0\u9700\u5c06\u6570\u636e\u590d\u5236\u5230\u7528\u6237\u6001\uff0c\u663e\u8457\u964d\u4f4e\u4e86\u5206\u6790\u5ef6\u8fdf\u3002 \u7cbe\u51c6\u4e8b\u4ef6\u89e6\u53d1\uff1a\u901a\u8fc7\u6302\u94a9\uff08hook\uff09\u5173\u952e\u5185\u6838\u51fd\u6570\uff08\u5982kmalloc\u3001kfree\uff09\uff0ceBPF\u80fd\u591f\u5728\u5185\u5b58\u5206\u914d\/\u91ca\u653e\u7684\u77ac\u95f4\u6355\u83b7\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u5b9e\u73b0\u7eb3\u79d2\u7ea7\u4e8b\u4ef6\u54cd\u5e94\u3002 \u4f4e\u5f00\u9500\u8bbe\u8ba1\uff1aeBPF\u865a\u62df\u673a\u901a\u8fc7\u4e25\u683c\u7684\u9a8c\u8bc1\u673a\u5236\u786e\u4fdd\u7a0b\u5e8f\u5b89\u5168\u6027\uff0c\u540c\u65f6\u91c7\u7528JIT\u7f16\u8bd1\u6280\u672f\u5c06\u5b57\u8282\u7801\u8f6c\u6362\u4e3a\u673a\u5668\u7801\uff0c\u8fd0\u884c\u6548\u7387\u63a5\u8fd1\u539f\u751f\u4ee3\u7801\u3002 \u8fd9\u4e00\u6280\u672f\u7279\u6027\u4f7feBPF\u6210\u4e3a\u5185\u5b58\u6cc4\u6f0f\u68c0\u6d4b\u3001\u5185\u5b58\u788e\u7247\u5316\u5206\u6790\u7b49\u9ad8\u7cbe\u5ea6\u573a\u666f\u7684\u7406\u60f3\u5de5\u5177\u3002 \u4e8c\u3001eBPF\u5185\u5b58\u5206\u6790\u7684\u6838\u5fc3\u4f18\u52bf 1. \u7ec6\u7c92\u5ea6\u6570\u636e\u6355\u83b7\u80fd\u529b \u4f20\u7edf\u5de5\u5177\uff08\u5982Valgrind\uff09\u4f9d\u8d56\u63d2\u6869\u6216\u91c7\u6837\uff0c\u96be\u4ee5\u8986\u76d6\u77ed\u751f\u547d\u5468\u671f\u5185\u5b58\u5bf9\u8c61\u7684\u5b9e\u65f6\u884c\u4e3a\u3002\u800ceBPF\u901a\u8fc7\u6302\u94a9\u5185\u5b58\u5206\u914d\u8def\u5f84\uff0c\u53ef\u8bb0\u5f55\u6bcf\u6b21\u5206\u914d\u7684\u8c03\u7528\u6808\u3001\u8fdb\u7a0bID\u3001\u5206\u914d\u5927\u5c0f\u7b49\u5143\u6570\u636e\u3002\u4f8b\u5982\uff0cBCC\u5de5\u5177\u96c6\u4e2d\u7684memleak\u5de5\u5177\uff0c\u6b63\u662f\u901a\u8fc7\u7edf\u8ba1\u672a\u91ca\u653e\u7684\u5185\u5b58\u5757\u53ca\u5176\u8c03\u7528\u6808\uff0c\u5b9e\u73b0\u6cc4\u6f0f\u70b9\u7cbe\u51c6\u5b9a\u4f4d\u3002 2. \u52a8\u6001\u53ef\u89c2\u6d4b\u6027\u4e0e\u65e0\u4fb5\u5165\u6027 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