{"id":36893,"date":"2025-04-11T15:14:59","date_gmt":"2025-04-11T07:14:59","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=36893"},"modified":"2025-04-11T15:14:59","modified_gmt":"2025-04-11T07:14:59","slug":"ebpf%e5%a6%82%e4%bd%95%e6%8f%90%e5%8d%87%e7%bd%91%e7%bb%9c%e5%ad%98%e5%82%a8%e7%b3%bb%e7%bb%9f%e7%9a%84%e6%80%a7%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/36893.html","title":{"rendered":"eBPF\u5982\u4f55\u63d0\u5347\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u7684\u6027\u80fd\uff1f"},"content":{"rendered":"

\n

\"eBPF\u5982\u4f55\u63d0\u5347\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u7684\u6027\u80fd\uff1f\"<\/p>\n<\/p>\n

\u524d\u8a00<\/strong>
\n\u5728\u6570\u5b57\u5316\u8f6c\u578b\u7684\u6d6a\u6f6e\u4e0b\uff0c\u6570\u636e\u5b58\u50a8\u4e0e\u4f20\u8f93\u7684\u6548\u7387\u5df2\u6210\u4e3a\u4f01\u4e1a\u7ade\u4e89\u529b\u7684\u6838\u5fc3\u6307\u6807\u3002\u4f20\u7edf\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u5e38\u56e0\u5185\u6838\u534f\u8bae\u6808\u5197\u957f\u3001\u6570\u636e\u5904\u7406\u5ef6\u8fdf\u9ad8\u3001\u8d44\u6e90\u8c03\u5ea6\u4e0d\u7075\u6d3b\u7b49\u95ee\u9898\uff0c\u96be\u4ee5\u6ee1\u8db3\u4e91\u539f\u751f\u65f6\u4ee3\u5bf9\u9ad8\u6027\u80fd\u7684\u9700\u6c42\u3002\u800ceBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\u7684\u51fa\u73b0\uff0c\u4e3a\u8fd9\u4e00\u96be\u9898\u63d0\u4f9b\u4e86\u98a0\u8986\u6027\u7684\u89e3\u51b3\u65b9\u6848\u3002\u8fd9\u9879\u6e90\u81eaLinux\u5185\u6838\u7684\u6280\u672f\uff0c\u901a\u8fc7\u52a8\u6001\u6ce8\u5165\u5b89\u5168\u3001\u9ad8\u6548\u7684\u4ee3\u7801\u903b\u8f91\uff0c\u91cd\u65b0\u5b9a\u4e49\u4e86\u7f51\u7edc\u5b58\u50a8\u7684\u6027\u80fd\u4f18\u5316\u8fb9\u754c\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF<\/a>\u5982\u4f55\u4ece\u5185\u6838\u5c42\u9762\u7a81\u7834\u74f6\u9888\uff0c\u4e3a\u73b0\u4ee3\u5206\u5e03\u5f0f\u5b58\u50a8\u3001\u4e91\u8ba1\u7b97\u573a\u666f\u6ce8\u5165\u65b0\u52a8\u80fd\u3002<\/p>\n

\n

\u4e00\u3001eBPF\uff1a\u5185\u6838\u53ef\u7f16\u7a0b\u5316\u7684\u9769\u547d\u6027\u6280\u672f<\/strong><\/h3>\n

eBPF\u6700\u521d\u88ab\u8bbe\u8ba1\u4e3a\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\u5de5\u5177\uff0c\u4f46\u5176\u771f\u6b63\u7684\u6f5c\u529b\u5728\u4e8e\u5141\u8bb8\u5f00\u53d1\u8005\u65e0\u9700\u4fee\u6539\u5185\u6838\u6e90\u7801<\/strong>\u5373\u53ef\u5728\u5185\u6838\u7a7a\u95f4\u8fd0\u884c\u6c99\u76d2\u5316\u7a0b\u5e8f\u3002\u8fd9\u79cd\u80fd\u529b\u6253\u7834\u4e86\u4f20\u7edf\u5185\u6838\u5f00\u53d1\u7684\u9650\u5236\uff0c\u4f7f\u5f97\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u7684\u6027\u80fd\u4f18\u5316\u80fd\u591f\u7ed5\u8fc7\u7e41\u5197\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u76f4\u63a5\u5728\u6570\u636e\u8def\u5f84\u4e0a\u5b9e\u73b0\u9ad8\u6548\u5904\u7406\u3002<\/p>\n

\u4e0e\u4f20\u7edf\u7684\u7528\u6237\u6001-\u5185\u6838\u6001\u4ea4\u4e92\u6a21\u5f0f\u76f8\u6bd4\uff0ceBPF\u7a0b\u5e8f\u901a\u8fc7\u96f6\u62f7\u8d1d\uff08Zero-Copy\uff09<\/strong>\u6280\u672f\u76f4\u63a5\u8bbf\u95ee\u5185\u6838\u6570\u636e\u7ed3\u6784\uff0c\u907f\u514d\u4e86\u6570\u636e\u5728\u5185\u5b58\u4e2d\u7684\u591a\u6b21\u590d\u5236\u3002\u4f8b\u5982\uff0c\u5728\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\u4e2d\uff0ceBPF\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u7f51\u5361\u76f4\u63a5\u4f20\u9012\u5230\u5e94\u7528\u5c42\u7f13\u5b58\uff0c\u51cf\u5c11\u9ad8\u8fbe30%\u7684I\/O\u5ef6\u8fdf\uff08\u6839\u636eLinux\u57fa\u91d1\u4f1a\u6d4b\u8bd5\u6570\u636e\uff09\u3002<\/p>\n

\n

\u4e8c\u3001\u7f51\u7edc\u5b58\u50a8\u6027\u80fd\u74f6\u9888\u4e0eeBPF\u7684\u7834\u5c40\u70b9<\/strong><\/h3>\n

\u4f20\u7edf\u7f51\u7edc\u5b58\u50a8\u67b6\u6784\u7684\u74f6\u9888\u901a\u5e38\u96c6\u4e2d\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n

    \n
  1. \u534f\u8bae\u6808\u5904\u7406\u5ef6\u8fdf<\/strong>\uff1aTCP\/IP\u534f\u8bae\u6808\u7684\u9010\u5c42\u89e3\u6790\u6d88\u8017\u5927\u91cfCPU\u8d44\u6e90\uff1b\n<\/li>\n
  2. \u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500<\/strong>\uff1a\u9891\u7e41\u7684\u5185\u6838\u6001\u4e0e\u7528\u6237\u6001\u5207\u6362\u5bfc\u81f4\u8d44\u6e90\u6d6a\u8d39\uff1b\n<\/li>\n
  3. \u52a8\u6001\u8d1f\u8f7d\u5747\u8861\u4e0d\u8db3<\/strong>\uff1a\u9759\u6001\u7b56\u7565\u96be\u4ee5\u5e94\u5bf9\u7a81\u53d1\u6d41\u91cf\u6216\u5f02\u6784\u786c\u4ef6\u73af\u5883\u3002\n<\/li>\n<\/ol>\n

    eBPF\u901a\u8fc7\u4ee5\u4e0b\u6838\u5fc3\u673a\u5236\u5b9e\u73b0\u7834\u5c40\uff1a<\/p>\n

      \n
    • XDP\uff08eXpress Data Path\uff09<\/strong>\uff1a\u5728\u7f51\u5361\u9a71\u52a8\u5c42\u76f4\u63a5\u5904\u7406\u6570\u636e\u5305\uff0c\u652f\u6301\u7ebf\u901f\u8fc7\u6ee4\u4e0e\u8f6c\u53d1<\/strong>\u3002\u4f8b\u5982\uff0cCeph\u53ef\u901a\u8fc7XDP\u7ed5\u8fc7\u5185\u6838\u534f\u8bae\u6808\uff0c\u5c06\u5143\u6570\u636e\u8bf7\u6c42\u76f4\u901a\u5b58\u50a8\u8282\u70b9\uff0c\u541e\u5410\u91cf\u63d0\u5347\u8d8540%\u3002\n<\/li>\n
    • \u52a8\u6001\u8ffd\u8e2a\u4e0e\u5b9e\u65f6\u4f18\u5316<\/strong>\uff1a\u501f\u52a9eBPF\u7684kprobe\/tracepoint<\/strong>\uff0c\u5f00\u53d1\u8005\u53ef\u5b9e\u65f6\u76d1\u63a7\u5b58\u50a8\u7cfb\u7edf\u7684I\/O\u6a21\u5f0f\uff0c\u52a8\u6001\u8c03\u6574\u6570\u636e\u5206\u53d1\u7b56\u7565\u3002\n<\/li>\n
    • \u667a\u80fd\u8d1f\u8f7d\u5747\u8861<\/strong>\uff1a\u5728eBPF\u7a0b\u5e8f\u4e2d\u5b9e\u73b0\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\uff0c\u7ed3\u5408\u786c\u4ef6\u52a0\u901f\uff08\u5982RDMA\uff09\uff0c\u663e\u8457\u964d\u4f4e\u8de8\u8282\u70b9\u8bbf\u95ee\u5ef6\u8fdf\u3002\n<\/li>\n<\/ul>\n
      \n

      \u4e09\u3001eBPF\u5728\u5b58\u50a8\u573a\u666f\u4e2d\u7684\u5173\u952e\u5e94\u7528<\/strong><\/h3>\n

      1. \u52a0\u901f\u5206\u5e03\u5f0f\u5b58\u50a8\u534f\u8bae<\/strong><\/h4>\n

      \u4ee5Ceph\u3001GlusterFS\u4e3a\u4ee3\u8868\u7684\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\uff0c\u5176\u6027\u80fd\u53d7\u9650\u4e8eRADOS\u7f51\u5173\u6216\u5ba2\u6237\u7aef\u534f\u8bae\u6808\u7684\u6548\u7387\u3002\u901a\u8fc7\u6ce8\u5165eBPF\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u5b9e\u73b0\uff1a<\/p>\n

        \n
      • \u5143\u6570\u636e\u8def\u5f84\u4f18\u5316<\/strong>\uff1a\u5c06\u76ee\u5f55\u6811\u67e5\u8be2\u3001\u6743\u9650\u6821\u9a8c\u7b49\u64cd\u4f5c\u4e0b\u6c89\u81f3\u5185\u6838\uff0c\u51cf\u5c11\u7528\u6237\u6001\u4e0a\u4e0b\u6587\u5207\u6362\uff1b\n<\/li>\n
      • \u5bf9\u8c61\u5b58\u50a8\u76f4\u901a<\/strong>\uff1a\u5728XDP\u5c42\u8fc7\u6ee4\u65e0\u6548\u8bf7\u6c42\uff0c\u4ec5\u5c06\u6709\u6548\u6570\u636e\u5757\u4f20\u9012\u81f3\u5b58\u50a8\u5f15\u64ce\uff0c\u964d\u4f4eCPU\u5360\u7528\u7387\u3002\n<\/li>\n<\/ul>\n

        2. \u5b9e\u73b0\u5b58\u50a8\u4e0e\u7f51\u7edc\u7684\u534f\u540c\u8c03\u5ea6<\/strong><\/h4>\n

        \u5728\u8d85\u878d\u5408\u67b6\u6784\u4e2d\uff0ceBPF\u53ef\u6253\u901a\u5b58\u50a8\u865a\u62df\u5316\u4e0e\u7f51\u7edc\u865a\u62df\u5316\u7684\u8d44\u6e90\u89c6\u56fe\u3002\u4f8b\u5982\uff1a<\/p>\n

          \n
        • \u57fa\u4e8e\u6d41\u91cf\u7279\u5f81\u7684QoS\u63a7\u5236<\/strong>\uff1a\u8bc6\u522bNVMe-oF\uff08NVMe over Fabrics\uff09\u6d41\u91cf\u4f18\u5148\u7ea7\uff0c\u52a8\u6001\u5206\u914d\u5e26\u5bbd\u4e0eIOPS\uff1b\n<\/li>\n
        • \u6545\u969c\u5feb\u901f\u6536\u655b<\/strong>\uff1a\u901a\u8fc7eBPF\u5b9e\u65f6\u68c0\u6d4b\u5b58\u50a8\u8282\u70b9\u5f02\u5e38\uff0c\u89e6\u53d1\u8def\u5f84\u5207\u6362\uff0c\u5c06\u6545\u969c\u6062\u590d\u65f6\u95f4\u4ece\u79d2\u7ea7\u7f29\u77ed\u81f3\u6beb\u79d2\u7ea7\u3002\n<\/li>\n<\/ul>\n

          3. \u589e\u5f3a\u5b58\u50a8\u5b89\u5168\u6027<\/strong><\/h4>\n

          eBPF\u4e0d\u4ec5\u63d0\u5347\u6027\u80fd\uff0c\u8fd8\u80fd\u5f3a\u5316\u5b89\u5168\u9632\u62a4\uff1a<\/p>\n

            \n
          • \u5fae\u9694\u79bb\u7b56\u7565<\/strong>\uff1a\u5728\u5185\u6838\u5c42\u5bf9\u5b58\u50a8\u5377\u7684\u8bbf\u95ee\u884c\u4e3a\u8fdb\u884c\u7ec6\u7c92\u5ea6\u9274\u6743\uff0c\u9632\u6b62\u672a\u7ecf\u6388\u6743\u7684\u6570\u636e\u6cc4\u9732\uff1b\n<\/li>\n
          • \u52a0\u5bc6\u6d41\u91cf\u5904\u7406<\/strong>\uff1a\u5728XDP\u5c42\u5378\u8f7dTLS\u52a0\u89e3\u5bc6\u64cd\u4f5c\uff0c\u91ca\u653eCPU\u8d44\u6e90\u7528\u4e8e\u4e1a\u52a1\u5904\u7406\u3002\n<\/li>\n<\/ul>\n
            \n

            \u56db\u3001\u5b9e\u8df5\u6848\u4f8b\uff1aeBPF\u5982\u4f55\u6539\u5199\u6027\u80fd\u89c4\u5219<\/strong><\/h3>\n

            \u6848\u4f8b1\uff1aFacebook\u7684L7\u8d1f\u8f7d\u5747\u8861\u4f18\u5316<\/strong><\/h4>\n

            Facebook\u5c06eBPF\u5e94\u7528\u4e8e\u5185\u90e8\u5b58\u50a8\u96c6\u7fa4\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u901a\u8fc7\u66ff\u6362iptables\u4e3aCilium\uff08\u57fa\u4e8eeBPF\u7684CNI\u63d2\u4ef6\uff09\uff0c\u5b9e\u73b0\uff1a<\/p>\n

              \n
            • \u8fde\u63a5\u8ffd\u8e2a\u6548\u7387\u63d0\u534710\u500d<\/strong>\uff1a\u4ece\u6bcf\u79d250\u4e07\u6b21\u589e\u52a0\u5230500\u4e07\u6b21\uff1b\n<\/li>\n
            • \u5c3e\u5ef6\u8fdf\u964d\u4f4e80%<\/strong>\uff1aP99\u5ef6\u8fdf\u4ece\u6beb\u79d2\u7ea7\u964d\u81f3\u5fae\u79d2\u7ea7\u3002\n<\/li>\n<\/ul>\n

              \u6848\u4f8b2\uff1aAWS\u7684\u5b58\u50a8\u7f51\u7edc\u52a0\u901f<\/strong><\/h4>\n

              Amazon\u5728Nitro\u7cfb\u7edf\u4e2d\u96c6\u6210eBPF\uff0c\u5c06\u865a\u62df\u5316\u5b58\u50a8\u7684I\/O\u8def\u5f84\u4ece18\u6b21\u5185\u6838\u51fd\u6570\u8c03\u7528\u7f29\u51cf\u81f33\u6b21\uff0c\u5355\u8282\u70b9NVMe SSD\u7684IOPS\u7a81\u7834100\u4e07\u3002<\/p>\n

              \n

              \u4e94\u3001\u6311\u6218\u4e0e\u672a\u6765\u5c55\u671b<\/strong><\/h3>\n

              \u5c3d\u7ba1eBPF\u6f5c\u529b\u5de8\u5927\uff0c\u4f46\u5728\u5b58\u50a8\u573a\u666f\u4e2d\u4ecd\u9700\u89e3\u51b3\uff1a<\/p>\n

                \n
              • \u5f00\u53d1\u590d\u6742\u5ea6\u9ad8<\/strong>\uff1a\u9700\u8981\u6df1\u5165\u7406\u89e3\u5185\u6838\u4e0e\u5b58\u50a8\u534f\u8bae\u6808\u7684\u4ea4\u4e92\u903b\u8f91\uff1b\n<\/li>\n
              • \u957f\u671f\u7a33\u5b9a\u6027<\/strong>\uff1a\u52a8\u6001\u52a0\u8f7d\u7684eBPF\u7a0b\u5e8f\u53ef\u80fd\u5f71\u54cd\u5185\u6838\u5b89\u5168\u8fb9\u754c\u3002\n<\/li>\n<\/ul>\n

                \u968f\u7740eBPF\u786c\u4ef6\u5378\u8f7d<\/strong>\uff08\u5982SmartNIC\u652f\u6301\uff09\u3001\u4e0eDPU\u7684\u6df1\u5ea6\u96c6\u6210<\/strong>\uff0c\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u6709\u671b\u8fdb\u4e00\u6b65\u5b9e\u73b0\u201c\u5b58\u7b97\u7f51\u4e00\u4f53\u5316\u201d\u3002\u5f00\u53d1\u8005\u53ef\u901a\u8fc7\u5f00\u6e90\u751f\u6001\uff08\u5982BCC\u3001bpftrace\uff09\u5feb\u901f\u6784\u5efa\u5b9a\u5236\u5316\u4f18\u5316\u65b9\u6848\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u5185\u6838\u7248\u672c\u8fed\u4ee3\u3002<\/p>\n

                \n

                \u6ce8<\/strong>\uff1a\u672c\u6587\u4e2d\u6d89\u53ca\u7684\u6027\u80fd\u6570\u636e\u5747\u6765\u81ea\u516c\u5f00\u6280\u672f\u767d\u76ae\u4e66\u4e0e\u793e\u533a\u6d4b\u8bd5\u62a5\u544a\uff0c\u5177\u4f53\u6570\u503c\u53ef\u80fd\u56e0\u73af\u5883\u5dee\u5f02\u800c\u53d8\u52a8\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

                \u524d\u8a00 \u5728\u6570\u5b57\u5316\u8f6c\u578b\u7684\u6d6a\u6f6e\u4e0b\uff0c\u6570\u636e\u5b58\u50a8\u4e0e\u4f20\u8f93\u7684\u6548\u7387\u5df2\u6210\u4e3a\u4f01\u4e1a\u7ade\u4e89\u529b\u7684\u6838\u5fc3\u6307\u6807\u3002\u4f20\u7edf\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u5e38\u56e0\u5185\u6838\u534f\u8bae\u6808\u5197\u957f\u3001\u6570\u636e\u5904\u7406\u5ef6\u8fdf\u9ad8\u3001\u8d44\u6e90\u8c03\u5ea6\u4e0d\u7075\u6d3b\u7b49\u95ee\u9898\uff0c\u96be\u4ee5\u6ee1\u8db3\u4e91\u539f\u751f\u65f6\u4ee3\u5bf9\u9ad8\u6027\u80fd\u7684\u9700\u6c42\u3002\u800ceBPF\uff08Extended Berkeley Packet Filter\uff09\u7684\u51fa\u73b0\uff0c\u4e3a\u8fd9\u4e00\u96be\u9898\u63d0\u4f9b\u4e86\u98a0\u8986\u6027\u7684\u89e3\u51b3\u65b9\u6848\u3002\u8fd9\u9879\u6e90\u81eaLinux\u5185\u6838\u7684\u6280\u672f\uff0c\u901a\u8fc7\u52a8\u6001\u6ce8\u5165\u5b89\u5168\u3001\u9ad8\u6548\u7684\u4ee3\u7801\u903b\u8f91\uff0c\u91cd\u65b0\u5b9a\u4e49\u4e86\u7f51\u7edc\u5b58\u50a8\u7684\u6027\u80fd\u4f18\u5316\u8fb9\u754c\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF\u5982\u4f55\u4ece\u5185\u6838\u5c42\u9762\u7a81\u7834\u74f6\u9888\uff0c\u4e3a\u73b0\u4ee3\u5206\u5e03\u5f0f\u5b58\u50a8\u3001\u4e91\u8ba1\u7b97\u573a\u666f\u6ce8\u5165\u65b0\u52a8\u80fd\u3002 \u4e00\u3001eBPF\uff1a\u5185\u6838\u53ef\u7f16\u7a0b\u5316\u7684\u9769\u547d\u6027\u6280\u672f eBPF\u6700\u521d\u88ab\u8bbe\u8ba1\u4e3a\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\u5de5\u5177\uff0c\u4f46\u5176\u771f\u6b63\u7684\u6f5c\u529b\u5728\u4e8e\u5141\u8bb8\u5f00\u53d1\u8005\u65e0\u9700\u4fee\u6539\u5185\u6838\u6e90\u7801\u5373\u53ef\u5728\u5185\u6838\u7a7a\u95f4\u8fd0\u884c\u6c99\u76d2\u5316\u7a0b\u5e8f\u3002\u8fd9\u79cd\u80fd\u529b\u6253\u7834\u4e86\u4f20\u7edf\u5185\u6838\u5f00\u53d1\u7684\u9650\u5236\uff0c\u4f7f\u5f97\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u7684\u6027\u80fd\u4f18\u5316\u80fd\u591f\u7ed5\u8fc7\u7e41\u5197\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u76f4\u63a5\u5728\u6570\u636e\u8def\u5f84\u4e0a\u5b9e\u73b0\u9ad8\u6548\u5904\u7406\u3002 \u4e0e\u4f20\u7edf\u7684\u7528\u6237\u6001-\u5185\u6838\u6001\u4ea4\u4e92\u6a21\u5f0f\u76f8\u6bd4\uff0ceBPF\u7a0b\u5e8f\u901a\u8fc7\u96f6\u62f7\u8d1d\uff08Zero-Copy\uff09\u6280\u672f\u76f4\u63a5\u8bbf\u95ee\u5185\u6838\u6570\u636e\u7ed3\u6784\uff0c\u907f\u514d\u4e86\u6570\u636e\u5728\u5185\u5b58\u4e2d\u7684\u591a\u6b21\u590d\u5236\u3002\u4f8b\u5982\uff0c\u5728\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\u4e2d\uff0ceBPF\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u7f51\u5361\u76f4\u63a5\u4f20\u9012\u5230\u5e94\u7528\u5c42\u7f13\u5b58\uff0c\u51cf\u5c11\u9ad8\u8fbe30%\u7684I\/O\u5ef6\u8fdf\uff08\u6839\u636eLinux\u57fa\u91d1\u4f1a\u6d4b\u8bd5\u6570\u636e\uff09\u3002 \u4e8c\u3001\u7f51\u7edc\u5b58\u50a8\u6027\u80fd\u74f6\u9888\u4e0eeBPF\u7684\u7834\u5c40\u70b9 \u4f20\u7edf\u7f51\u7edc\u5b58\u50a8\u67b6\u6784\u7684\u74f6\u9888\u901a\u5e38\u96c6\u4e2d\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a \u534f\u8bae\u6808\u5904\u7406\u5ef6\u8fdf\uff1aTCP\/IP\u534f\u8bae\u6808\u7684\u9010\u5c42\u89e3\u6790\u6d88\u8017\u5927\u91cfCPU\u8d44\u6e90\uff1b \u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\uff1a\u9891\u7e41\u7684\u5185\u6838\u6001\u4e0e\u7528\u6237\u6001\u5207\u6362\u5bfc\u81f4\u8d44\u6e90\u6d6a\u8d39\uff1b \u52a8\u6001\u8d1f\u8f7d\u5747\u8861\u4e0d\u8db3\uff1a\u9759\u6001\u7b56\u7565\u96be\u4ee5\u5e94\u5bf9\u7a81\u53d1\u6d41\u91cf\u6216\u5f02\u6784\u786c\u4ef6\u73af\u5883\u3002 eBPF\u901a\u8fc7\u4ee5\u4e0b\u6838\u5fc3\u673a\u5236\u5b9e\u73b0\u7834\u5c40\uff1a XDP\uff08eXpress Data Path\uff09\uff1a\u5728\u7f51\u5361\u9a71\u52a8\u5c42\u76f4\u63a5\u5904\u7406\u6570\u636e\u5305\uff0c\u652f\u6301\u7ebf\u901f\u8fc7\u6ee4\u4e0e\u8f6c\u53d1\u3002\u4f8b\u5982\uff0cCeph\u53ef\u901a\u8fc7XDP\u7ed5\u8fc7\u5185\u6838\u534f\u8bae\u6808\uff0c\u5c06\u5143\u6570\u636e\u8bf7\u6c42\u76f4\u901a\u5b58\u50a8\u8282\u70b9\uff0c\u541e\u5410\u91cf\u63d0\u5347\u8d8540%\u3002 \u52a8\u6001\u8ffd\u8e2a\u4e0e\u5b9e\u65f6\u4f18\u5316\uff1a\u501f\u52a9eBPF\u7684kprobe\/tracepoint\uff0c\u5f00\u53d1\u8005\u53ef\u5b9e\u65f6\u76d1\u63a7\u5b58\u50a8\u7cfb\u7edf\u7684I\/O\u6a21\u5f0f\uff0c\u52a8\u6001\u8c03\u6574\u6570\u636e\u5206\u53d1\u7b56\u7565\u3002 \u667a\u80fd\u8d1f\u8f7d\u5747\u8861\uff1a\u5728eBPF\u7a0b\u5e8f\u4e2d\u5b9e\u73b0\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\uff0c\u7ed3\u5408\u786c\u4ef6\u52a0\u901f\uff08\u5982RDMA\uff09\uff0c\u663e\u8457\u964d\u4f4e\u8de8\u8282\u70b9\u8bbf\u95ee\u5ef6\u8fdf\u3002 \u4e09\u3001eBPF\u5728\u5b58\u50a8\u573a\u666f\u4e2d\u7684\u5173\u952e\u5e94\u7528 1. \u52a0\u901f\u5206\u5e03\u5f0f\u5b58\u50a8\u534f\u8bae \u4ee5Ceph\u3001GlusterFS\u4e3a\u4ee3\u8868\u7684\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\uff0c\u5176\u6027\u80fd\u53d7\u9650\u4e8eRADOS\u7f51\u5173\u6216\u5ba2\u6237\u7aef\u534f\u8bae\u6808\u7684\u6548\u7387\u3002\u901a\u8fc7\u6ce8\u5165eBPF\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u5b9e\u73b0\uff1a \u5143\u6570\u636e\u8def\u5f84\u4f18\u5316\uff1a\u5c06\u76ee\u5f55\u6811\u67e5\u8be2\u3001\u6743\u9650\u6821\u9a8c\u7b49\u64cd\u4f5c\u4e0b\u6c89\u81f3\u5185\u6838\uff0c\u51cf\u5c11\u7528\u6237\u6001\u4e0a\u4e0b\u6587\u5207\u6362\uff1b \u5bf9\u8c61\u5b58\u50a8\u76f4\u901a\uff1a\u5728XDP\u5c42\u8fc7\u6ee4\u65e0\u6548\u8bf7\u6c42\uff0c\u4ec5\u5c06\u6709\u6548\u6570\u636e\u5757\u4f20\u9012\u81f3\u5b58\u50a8\u5f15\u64ce\uff0c\u964d\u4f4eCPU\u5360\u7528\u7387\u3002 2. \u5b9e\u73b0\u5b58\u50a8\u4e0e\u7f51\u7edc\u7684\u534f\u540c\u8c03\u5ea6 \u5728\u8d85\u878d\u5408\u67b6\u6784\u4e2d\uff0ceBPF\u53ef\u6253\u901a\u5b58\u50a8\u865a\u62df\u5316\u4e0e\u7f51\u7edc\u865a\u62df\u5316\u7684\u8d44\u6e90\u89c6\u56fe\u3002\u4f8b\u5982\uff1a \u57fa\u4e8e\u6d41\u91cf\u7279\u5f81\u7684QoS\u63a7\u5236\uff1a\u8bc6\u522bNVMe-oF\uff08NVMe over Fabrics\uff09\u6d41\u91cf\u4f18\u5148\u7ea7\uff0c\u52a8\u6001\u5206\u914d\u5e26\u5bbd\u4e0eIOPS\uff1b \u6545\u969c\u5feb\u901f\u6536\u655b\uff1a\u901a\u8fc7eBPF\u5b9e\u65f6\u68c0\u6d4b\u5b58\u50a8\u8282\u70b9\u5f02\u5e38\uff0c\u89e6\u53d1\u8def\u5f84\u5207\u6362\uff0c\u5c06\u6545\u969c\u6062\u590d\u65f6\u95f4\u4ece\u79d2\u7ea7\u7f29\u77ed\u81f3\u6beb\u79d2\u7ea7\u3002 3. \u589e\u5f3a\u5b58\u50a8\u5b89\u5168\u6027 eBPF\u4e0d\u4ec5\u63d0\u5347\u6027\u80fd\uff0c\u8fd8\u80fd\u5f3a\u5316\u5b89\u5168\u9632\u62a4\uff1a \u5fae\u9694\u79bb\u7b56\u7565\uff1a\u5728\u5185\u6838\u5c42\u5bf9\u5b58\u50a8\u5377\u7684\u8bbf\u95ee\u884c\u4e3a\u8fdb\u884c\u7ec6\u7c92\u5ea6\u9274\u6743\uff0c\u9632\u6b62\u672a\u7ecf\u6388\u6743\u7684\u6570\u636e\u6cc4\u9732\uff1b \u52a0\u5bc6\u6d41\u91cf\u5904\u7406\uff1a\u5728XDP\u5c42\u5378\u8f7dTLS\u52a0\u89e3\u5bc6\u64cd\u4f5c\uff0c\u91ca\u653eCPU\u8d44\u6e90\u7528\u4e8e\u4e1a\u52a1\u5904\u7406\u3002 \u56db\u3001\u5b9e\u8df5\u6848\u4f8b\uff1aeBPF\u5982\u4f55\u6539\u5199\u6027\u80fd\u89c4\u5219 \u6848\u4f8b1\uff1aFacebook\u7684L7\u8d1f\u8f7d\u5747\u8861\u4f18\u5316 Facebook\u5c06eBPF\u5e94\u7528\u4e8e\u5185\u90e8\u5b58\u50a8\u96c6\u7fa4\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u901a\u8fc7\u66ff\u6362iptables\u4e3aCilium\uff08\u57fa\u4e8eeBPF\u7684CNI\u63d2\u4ef6\uff09\uff0c\u5b9e\u73b0\uff1a \u8fde\u63a5\u8ffd\u8e2a\u6548\u7387\u63d0\u534710\u500d\uff1a\u4ece\u6bcf\u79d250\u4e07\u6b21\u589e\u52a0\u5230500\u4e07\u6b21\uff1b \u5c3e\u5ef6\u8fdf\u964d\u4f4e80%\uff1aP99\u5ef6\u8fdf\u4ece\u6beb\u79d2\u7ea7\u964d\u81f3\u5fae\u79d2\u7ea7\u3002 \u6848\u4f8b2\uff1aAWS\u7684\u5b58\u50a8\u7f51\u7edc\u52a0\u901f Amazon\u5728Nitro\u7cfb\u7edf\u4e2d\u96c6\u6210eBPF\uff0c\u5c06\u865a\u62df\u5316\u5b58\u50a8\u7684I\/O\u8def\u5f84\u4ece18\u6b21\u5185\u6838\u51fd\u6570\u8c03\u7528\u7f29\u51cf\u81f33\u6b21\uff0c\u5355\u8282\u70b9NVMe SSD\u7684IOPS\u7a81\u7834100\u4e07\u3002 \u4e94\u3001\u6311\u6218\u4e0e\u672a\u6765\u5c55\u671b \u5c3d\u7ba1eBPF\u6f5c\u529b\u5de8\u5927\uff0c\u4f46\u5728\u5b58\u50a8\u573a\u666f\u4e2d\u4ecd\u9700\u89e3\u51b3\uff1a \u5f00\u53d1\u590d\u6742\u5ea6\u9ad8\uff1a\u9700\u8981\u6df1\u5165\u7406\u89e3\u5185\u6838\u4e0e\u5b58\u50a8\u534f\u8bae\u6808\u7684\u4ea4\u4e92\u903b\u8f91\uff1b \u957f\u671f\u7a33\u5b9a\u6027\uff1a\u52a8\u6001\u52a0\u8f7d\u7684eBPF\u7a0b\u5e8f\u53ef\u80fd\u5f71\u54cd\u5185\u6838\u5b89\u5168\u8fb9\u754c\u3002 \u968f\u7740eBPF\u786c\u4ef6\u5378\u8f7d\uff08\u5982SmartNIC\u652f\u6301\uff09\u3001\u4e0eDPU\u7684\u6df1\u5ea6\u96c6\u6210\uff0c\u7f51\u7edc\u5b58\u50a8\u7cfb\u7edf\u6709\u671b\u8fdb\u4e00\u6b65\u5b9e\u73b0\u201c\u5b58\u7b97\u7f51\u4e00\u4f53\u5316\u201d\u3002\u5f00\u53d1\u8005\u53ef\u901a\u8fc7\u5f00\u6e90\u751f\u6001\uff08\u5982BCC\u3001bpftrace\uff09\u5feb\u901f\u6784\u5efa\u5b9a\u5236\u5316\u4f18\u5316\u65b9\u6848\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u5185\u6838\u7248\u672c\u8fed\u4ee3\u3002 \u6ce8\uff1a\u672c\u6587\u4e2d\u6d89\u53ca\u7684\u6027\u80fd\u6570\u636e\u5747\u6765\u81ea\u516c\u5f00\u6280\u672f\u767d\u76ae\u4e66\u4e0e\u793e\u533a\u6d4b\u8bd5\u62a5\u544a\uff0c\u5177\u4f53\u6570\u503c\u53ef\u80fd\u56e0\u73af\u5883\u5dee\u5f02\u800c\u53d8\u52a8\u3002<\/p>\n","protected":false},"author":4,"featured_media":36894,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-36893","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\/36893","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=36893"}],"version-history":[{"count":1,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/36893\/revisions"}],"predecessor-version":[{"id":36895,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/posts\/36893\/revisions\/36895"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media\/36894"}],"wp:attachment":[{"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/media?parent=36893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/categories?post=36893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunshan.net\/blog\/wp-json\/wp\/v2\/tags?post=36893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}