{"id":329,"date":"2025-07-30T00:03:51","date_gmt":"2025-07-29T16:03:51","guid":{"rendered":"http:\/\/yangnanbei.top\/?p=329"},"modified":"2025-08-03T22:37:15","modified_gmt":"2025-08-03T14:37:15","slug":"perf%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0maaaaaster","status":"publish","type":"post","link":"http:\/\/yangnanbei.top\/index.php\/2025\/07\/30\/perf%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0maaaaaster\/","title":{"rendered":"linux\u6027\u80fd\u5206\u6790\u5de5\u5177\u2014\u2014perf"},"content":{"rendered":"\n

Make tiny progress every day. \u2014\u2014yangnanbei<\/p>\n\n\n\n

\u53c2\u8003\u8d44\u6599\uff1a<\/p>\n\n\n\n

    \n
  1. https:\/\/perf.wiki.kernel.org<\/li>\n\n\n\n
  2. man\u624b\u518c<\/li>\n\n\n\n
  3. https:\/\/www.youtube.com\/playlist?list=PLx-WakpEO8zFQGRrB4xYAuWjHKqVWlwaD<\/li>\n\n\n\n
  4. Perf\u66f4\u8be6\u7ec6\u7684\u4ecb\u7ecd – \u9648\u5c0f\u6b27 – 20210512 – PLCT\u5b9e\u9a8c\u5ba4_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a><\/li>\n\n\n\n
  5. https:\/\/zhuanlan.zhihu.com\/p\/147875569<\/li>\n<\/ol>\n\n\n\n

    \u524d\u8a00<\/h1>\n\n\n\n

    \u8fd8\u8bb0\u5f97\u6211\u7b2c\u4e00\u4efd\u5de5\u4f5c\u521a\u5165\u804c\u5f00\u53d1\u7684\u7b2c\u4e00\u4e2a\u63a5\u53e3\uff0c\u5728\u7f51\u7edc\u6808\u5165\u53e3\u52a0\u4e86\u4e00\u4e2a\u5bf9\u4e8b\u4ef6A\u7684\u5904\u7406\u3002\u90a3\u65f6\u5019\u865a\u7ebf\u7684+1\u5f3a\u8c03\u8981\u6ce8\u610f\u8fd9\u4e00\u5757\u7684\u6027\u80fd\uff0c\u8fd8\u53cd\u590d\u4fee\u6539\u4e86\u51e0\u6b21\u3002\u90a3\u65f6\u6211\u95ee\u4e3a\u4ec0\u4e48\uff1f\u4ed6\u53ea\u8bf4\u8fd9\u662f\u5904\u7406\u94fe\u8def\u5fc5\u7ecf\u7684\u6d41\u7a0b\uff0c\u6240\u4ee5\u6027\u80fd\u8981\u7740\u91cd\u8003\u8651\u3002<\/p>\n\n\n\n

    \u5b9e\u9645\u4e0a\uff0c\u7531\u201c\u5fc5\u7ecf\u94fe\u8def\u201d\u63a8\u51fa\u201c\u6027\u80fd\u5904\u7406\u91cd\u8981\u201d\u96be\u514d\u6709\u5c40\u90e8\u8fc7\u5ea6\u4f18\u5316\u7684\u5acc\u7591\u3002\u6027\u80fd\u95ee\u9898\u4e5f\u9075\u5faa20\/80<\/code>\u539f\u5219\uff0c\u537380%\u7684\u6027\u80fd\u95ee\u9898\u662f\u753120%\u7684\u6027\u80fd\u4e0d\u53cb\u597d\u4ee3\u7801\u9020\u6210\u7684\uff0c\u5982\u4f55\u5b9a\u4f4d\u6027\u80fd\u4e0d\u53cb\u597d\u7684\u4ee3\u7801\u662f\u6027\u80fd\u5206\u6790\u4e2d\u5f88\u91cd\u8981\u7684\u8bfe\u9898\u3002<\/p>\n\n\n\n

    perf<\/code>\u5de5\u5177\u6b63\u662f\u6211\u4eec\u5b9a\u4f4d\u6027\u80fd\u95ee\u9898\u7684\u597d\u5e2e\u624b\uff0cperf<\/code> \u662f Linux \u7cfb\u7edf\u6027\u80fd\u5206\u6790\u548c\u4f18\u5316\u7684\u57fa\u77f3\u5de5\u5177\u3002\u5b83\u6700\u5927\u7684\u4ef7\u503c\u5728\u4e8e\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9ad8\u6548\u3001\u4f4e\u5f00\u9500\u3001\u6df1\u5ea6\u96c6\u6210\u7684\u9014\u5f84\uff0c\u8ba9\u5f00\u53d1\u8005\u80fd\u591f\u8de8\u8d8a\u786c\u4ef6\u3001\u5185\u6838\u3001\u7528\u6237\u5e94\u7528\u7684\u754c\u9650\uff0c\u7cbe\u786e\u5730\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\u7684\u6839\u6e90\uff08\u7cbe\u786e\u5230\u51fd\u6570\u3001\u6e90\u7801\u884c\u751a\u81f3\u6307\u4ee4\uff09\u3002\u65e0\u8bba\u662f\u8fdb\u884c\u5fae\u89c2\u7684\u4ee3\u7801\u4f18\u5316\uff0c\u8fd8\u662f\u8bca\u65ad\u5b8f\u89c2\u7684\u7cfb\u7edf\u7ea7\u95ee\u9898\uff0cperf<\/code> \u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u5229\u5668\u3002\u638c\u63e1 perf<\/code> \u662f Linux \u5f00\u53d1\u8005\u548c\u6027\u80fd\u5de5\u7a0b\u5e08\u7684\u6838\u5fc3\u6280\u80fd\u4e4b\u4e00\u3002<\/p>\n\n\n\n

    \u8ba9\u6211\u4eec\u8bf7\u5927D\u8001\u5e08<\/strong>\u4ecb\u7ecd\u4e00\u4e0bperf\u5427\uff1a<\/p>\n\n\n\n

    \u4f7f\u7528 perf<\/code> \u7684\u80cc\u666f\/\u539f\u56e0\uff1a<\/p>\n\n\n\n

      \n
    1. \u5185\u6838\u96c6\u6210\uff1a \u4f5c\u4e3a\u5185\u6838\u7684\u4e00\u90e8\u5206\uff08\u901a\u8fc7 perf_event_open<\/code> \u7cfb\u7edf\u8c03\u7528\uff09\uff0cperf<\/code> \u5177\u6709\u6781\u9ad8\u7684\u6743\u9650\u548c\u4f4e\u5f00\u9500\uff0c\u80fd\u8bbf\u95ee\u5e95\u5c42\u786c\u4ef6\u8ba1\u6570\u5668\u548c\u5185\u6838\u5185\u90e8\u72b6\u6001\u3002<\/li>\n\n\n\n
    2. \u66ff\u4ee3\u4f20\u7edf\u5de5\u5177\uff1a \u5b83\u6574\u5408\u5e76\u8d85\u8d8a\u4e86\u4e4b\u524d\u5206\u6563\u7684\u5de5\u5177\u5982 oprofile<\/code>\u3001ptrace<\/code> \u7684\u90e8\u5206\u529f\u80fd\uff0c\u63d0\u4f9b\u4e86\u66f4\u7edf\u4e00\u3001\u9ad8\u6548\u7684\u754c\u9762\u3002<\/li>\n\n\n\n
    3. \u786c\u4ef6\u652f\u6301\uff1a \u76f4\u63a5\u5229\u7528 CPU\uff08Intel \u7684 PMU, AMD \u7684 IBS, ARM \u7684 PMU \u7b49\uff09\u63d0\u4f9b\u7684\u786c\u4ef6\u6027\u80fd\u8ba1\u6570\u5668\uff0c\u7cbe\u786e\u6d4b\u91cf\u5982 CPU \u5468\u671f\u3001\u6307\u4ee4\u6570\u3001\u7f13\u5b58\u547d\u4e2d\/\u5931\u6548\u3001\u5206\u652f\u9884\u6d4b\u9519\u8bef\u7b49\u5e95\u5c42\u786c\u4ef6\u4e8b\u4ef6\u3002<\/li>\n\n\n\n
    4. \u8f6f\u4ef6\u62bd\u8c61\uff1a \u9664\u4e86\u786c\u4ef6\u4e8b\u4ef6\uff0c\u8fd8\u80fd\u8bbf\u95ee\u8f6f\u4ef6\u4e8b\u4ef6\uff08\u5982\u9875\u9762\u9519\u8bef\u3001\u4e0a\u4e0b\u6587\u5207\u6362\u3001\u8c03\u5ea6\u4e8b\u4ef6\uff09\u548c\u8ddf\u8e2a\u70b9\uff08\u5185\u6838\u4e2d\u9884\u5b9a\u4e49\u7684\u9759\u6001\u63a2\u6d4b\u70b9\uff09\u4ee5\u53ca\u52a8\u6001\u63a2\u9488\uff08kprobes, uprobes\uff09\u3002<\/li>\n\n\n\n
    5. \u89e3\u51b3\u6027\u80fd\u75db\u70b9\uff1a \u5728\u590d\u6742\u7684\u73b0\u4ee3\u7cfb\u7edf\uff08\u591a\u6838\u3001\u8d85\u7ebf\u7a0b\u3001NUMA\u3001\u590d\u6742\u8f6f\u4ef6\u6808\uff09\u4e2d\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\uff08CPU\u3001\u5185\u5b58\u3001I\/O\u3001\u9501\u4e89\u7528\u7b49\uff09\u975e\u5e38\u56f0\u96be\uff0c\u9700\u8981\u6df1\u5165\u4e14\u5168\u9762\u7684\u5de5\u5177\u3002<\/li>\n<\/ol>\n\n\n\n

      \u4f7f\u7528 perf<\/code> \u7684\u4e3b\u8981\u597d\u5904\uff1a<\/p>\n\n\n\n

        \n
      1. \u529f\u80fd\u5168\u9762\uff08One Tool to Rule Them All\uff09\uff1a\n
          \n
        1. CPU \u5206\u6790\uff1a \u5206\u6790\u70ed\u70b9\u51fd\u6570\u3001\u6307\u4ee4\u7ea7\u5f00\u9500\u3001CPI \u7b49\u3002<\/li>\n\n\n\n
        2. \u7f13\u5b58\u5206\u6790\uff1a \u5b9a\u4f4d\u7f13\u5b58\u672a\u547d\u4e2d\uff08L1\/L2\/L3 dTLB\/iTLB\uff09\u7684\u4ee3\u7801\u4f4d\u7f6e\u3002<\/li>\n\n\n\n
        3. \u5185\u5b58\u5206\u6790\uff1a \u5206\u6790\u5185\u5b58\u8bbf\u95ee\u6a21\u5f0f\u3001\u5e26\u5bbd\u3001\u7f3a\u9875\u5f02\u5e38\u3002<\/li>\n\n\n\n
        4. I\/O \u5206\u6790\uff1a \u8ddf\u8e2a\u5757\u8bbe\u5907 I\/O\u3001\u540c\u6b65\u5f00\u9500\uff08\u867d\u7136\u4e0d\u5982 bpftrace<\/code>\/eBPF<\/code> \u7075\u6d3b\uff0c\u4f46\u57fa\u7840\u652f\u6301\uff09\u3002<\/li>\n\n\n\n
        5. \u8c03\u5ea6\u5206\u6790\uff1a \u5206\u6790\u4e0a\u4e0b\u6587\u5207\u6362\u3001CPU \u8fc1\u79fb\u3001\u8d1f\u8f7d\u5747\u8861\u95ee\u9898\u3001\u8c03\u5ea6\u5ef6\u8fdf\u3002<\/li>\n\n\n\n
        6. \u9501\u5206\u6790\uff1a \u68c0\u6d4b\u9501\u4e89\u7528\u3001\u81ea\u65cb\u9501\u6301\u6709\u65f6\u95f4\u3002<\/li>\n\n\n\n
        7. \u8c03\u7528\u94fe\u5206\u6790\uff1a \u8bb0\u5f55\u5e76\u53ef\u89c6\u5316\u51fd\u6570\u8c03\u7528\u5173\u7cfb\uff08stack traces\uff09\u3002<\/li>\n\n\n\n
        8. \u8ddf\u8e2a\uff1a \u8bb0\u5f55\u5185\u6838\u548c\u7528\u6237\u7a7a\u95f4\u7279\u5b9a\u4e8b\u4ef6\u7684\u53d1\u751f\u5e8f\u5217\uff08perf record -e tracepoint<\/code>\uff09\u3002<\/li>\n\n\n\n
        9. \u9759\u6001\/\u52a8\u6001\u63a2\u9488\uff1a \u5728\u51fd\u6570\u5165\u53e3\/\u51fa\u53e3\u6216\u4efb\u610f\u6307\u4ee4\u5904\u63d2\u5165\u63a2\u6d4b\u70b9\u6536\u96c6\u6570\u636e\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
        10. \u4f4e\u5f00\u9500\uff1a\n
            \n
          1. \u5229\u7528\u786c\u4ef6\u8ba1\u6570\u5668\u8fdb\u884c\u91c7\u6837\uff0c\u5f00\u9500\u901a\u5e38\u5f88\u4f4e\uff08\u5c24\u5176\u662f\u91c7\u6837\u6a21\u5f0f\uff09\uff0c\u9002\u5408\u751f\u4ea7\u73af\u5883\u4f7f\u7528\u3002<\/li>\n\n\n\n
          2. \u5185\u6838\u7ea7\u5b9e\u73b0\u907f\u514d\u4e86\u9891\u7e41\u7684\u7528\u6237\/\u5185\u6838\u6001\u5207\u6362\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
          3. \u6df1\u5ea6\u6d1e\u5bdf\uff08\u4ece\u786c\u4ef6\u5230\u5e94\u7528\uff09\uff1a\n
              \n
            1. \u8de8\u8d8a\u5c42\u7ea7\uff1a \u80fd\u5c06\u786c\u4ef6\u4e8b\u4ef6\uff08\u5982\u7f13\u5b58\u672a\u547d\u4e2d\uff09\u76f4\u63a5\u5173\u8054\u5230\u7279\u5b9a\u7684\u5185\u6838\u51fd\u6570\u751a\u81f3\u7528\u6237\u7a7a\u95f4\u7684\u4ee3\u7801\u884c\u6216\u6307\u4ee4\u3002\u8fd9\u662f\u5176\u6700\u5f3a\u5927\u7684\u4f18\u52bf\u4e4b\u4e00\u3002<\/li>\n\n\n\n
            2. \u7cbe\u786e\u5230\u6307\u4ee4\/\u6e90\u7801\u884c\uff1a \u7ed3\u5408\u8c03\u8bd5\u4fe1\u606f\uff08-g<\/code>\uff09\uff0c\u53ef\u4ee5\u5c06\u6027\u80fd\u4e8b\u4ef6\u5b9a\u4f4d\u5230\u6e90\u4ee3\u7801\u884c\u6216\u6c47\u7f16\u6307\u4ee4\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
            3. \u751f\u4ea7\u73af\u5883\u53cb\u597d\uff1a\n
                \n
              1. \u4f4e\u5f00\u9500\u4f7f\u5176\u80fd\u591f\u5728\u771f\u5b9e\u8d1f\u8f7d\u4e0b\u8fd0\u884c\uff0c\u6355\u83b7\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u4e2d\u7684\u95ee\u9898\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u5728\u6d4b\u8bd5\u73af\u5883\u4e2d\u3002<\/li>\n\n\n\n
              2. \u4e0d\u9700\u8981\u4fee\u6539\u6216\u91cd\u542f\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
              3. \u4e30\u5bcc\u7684\u62a5\u544a\u548c\u53ef\u89c6\u5316\uff1a\n
                  \n
                1. perf report<\/code>\uff1a \u4ea4\u4e92\u5f0f\u67e5\u770b\u91c7\u6837\u7ed3\u679c\uff0c\u6309\u51fd\u6570\u3001\u6e90\u7801\u884c\u3001\u6307\u4ee4\u6392\u5e8f\u70ed\u70b9\u3002<\/li>\n\n\n\n
                2. perf annotate<\/code>\uff1a \u5c06\u6c47\u7f16\u6307\u4ee4\u6216\u6e90\u7801\u884c\u4e0e\u4e8b\u4ef6\u8ba1\u6570\u5173\u8054\u663e\u793a\u3002<\/li>\n\n\n\n
                3. perf script<\/code>\uff1a \u5bfc\u51fa\u539f\u59cb\u6570\u636e\u4f9b\u81ea\u5b9a\u4e49\u811a\u672c\u5206\u6790\uff08\u5982\u751f\u6210\u706b\u7130\u56fe\uff09\u3002<\/li>\n\n\n\n
                4. \u706b\u7130\u56fe\uff1a perf<\/code> \u6570\u636e\u662f\u751f\u6210 CPU\u3001\u5185\u5b58\u706b\u7130\u56fe\uff08FlameGraph\uff09\u7684\u6807\u51c6\u8f93\u5165\u6765\u6e90\uff0c\u63d0\u4f9b\u76f4\u89c2\u7684\u6027\u80fd\u74f6\u9888\u53ef\u89c6\u5316\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
                5. \u5f3a\u5927\u7684\u7edf\u8ba1\u529f\u80fd\uff1a\n
                    \n
                  1. perf stat<\/code>\uff1a \u5feb\u901f\u8fd0\u884c\u4e00\u4e2a\u547d\u4ee4\u5e76\u6c47\u603b\u6574\u4e2a\u6267\u884c\u8fc7\u7a0b\u4e2d\u7684\u5404\u79cd\u786c\u4ef6\/\u8f6f\u4ef6\u4e8b\u4ef6\u8ba1\u6570\uff0c\u63d0\u4f9b\u5b8f\u89c2\u6027\u80fd\u6307\u6807\uff08\u5982 IPC – Instructions Per Cycle\uff09\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
                  2. \u6d3b\u8dc3\u7684\u793e\u533a\u548c\u751f\u6001\u7cfb\u7edf\uff1a\n
                      \n
                    1. \u4f5c\u4e3a Linux \u5185\u6838\u7684\u4e00\u90e8\u5206\uff0c\u6301\u7eed\u66f4\u65b0\uff0c\u652f\u6301\u65b0\u786c\u4ef6\u548c\u65b0\u7279\u6027\u3002<\/li>\n\n\n\n
                    2. \u6709\u5927\u91cf\u7684\u6559\u7a0b\u3001\u535a\u5ba2\u6587\u7ae0\u3001\u6848\u4f8b\u5206\u6790\u548c\u5de5\u5177\uff08\u5982\u706b\u7130\u56fe\u751f\u6210\u811a\u672c\uff09\u56f4\u7ed5\u5b83\u5c55\u5f00\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n
                    3. \u76f8\u5bf9\u6613\u7528\u6027\uff08\u76f8\u6bd4\u66f4\u5e95\u5c42\u7684\u5de5\u5177\uff09\uff1a\n
                        \n
                      1. \u63d0\u4f9b\u4e86\u76f8\u5bf9\u9ad8\u7ea7\u7684\u547d\u4ee4\u884c\u63a5\u53e3\uff0c\u62bd\u8c61\u4e86\u5e95\u5c42\u786c\u4ef6\u7684\u590d\u6742\u6027\u3002<\/li>\n\n\n\n
                      2. \u5e38\u7528\u573a\u666f\uff08\u5982 CPU \u70ed\u70b9\u5206\u6790\uff09\u7684\u547d\u4ee4\uff08perf record<\/code>, perf report<\/code>\uff09\u5b66\u4e60\u66f2\u7ebf\u76f8\u5bf9\u5e73\u7f13\u3002<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n\n

                        \u547d\u4ee4<\/h1>\n\n\n\n

                        \u4e3b\u5305\u5728wsl\u73af\u5883\u5b9e\u9a8c\uff0c\u90e8\u5206\u786c\u4ef6\u8ba1\u6570\u65e0\u6cd5\u91c7\u96c6\u3002<\/p>\n\n\n\n

                        perf list<\/h2>\n\n\n\n

                        \u663e\u793a\u5f53\u4e0b\u73af\u5883perf\u652f\u6301\u7684trace point<\/p>\n\n\n\n

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