{"id":3555,"date":"2021-07-04T15:57:06","date_gmt":"2021-07-04T07:57:06","guid":{"rendered":"https:\/\/wyxxt.org.cn\/?p=3555"},"modified":"2023-12-04T15:18:51","modified_gmt":"2023-12-04T07:18:51","slug":"go%e9%97%ae%e9%a2%98%e6%8e%92%e6%9f%a5","status":"publish","type":"post","link":"https:\/\/wyxxt.org.cn\/?p=3555","title":{"rendered":"go\u95ee\u9898\u6392\u67e5"},"content":{"rendered":"

\u7ebf\u4e0a\u95ee\u9898\u6392\u67e5\u601d\u8def\uff08\u5982\u5ffd\u7136\u8bbf\u95ee\u53d8\u6162\uff09<\/h1>\n
    \n
  1. \u94fe\u8def\u8ffd\u8e2a\uff08zipkin skywalking\u7b49\uff09\uff0c\u786e\u8ba4\u95ee\u9898\u5728\u54ea\u6761\u94fe\u8def\u4e0a\uff08\u662f\u5426\u662f\u56e0\u4e3a\u8c03\u7528\u522b\u4eba\u7684\u63a5\u53e3\u5f15\u8d77\u7684\uff0c\u89e3\u51b3\u65b9\u6848\u7194\u65ad\u964d\u7ea7\uff09<\/li>\n
  2. \u67e5\u770b\u76f8\u5e94\u5bb9\u5668\u7684prometheus\uff0c\u89c2\u5bdfcpu\u3001\u5185\u5b58\u3001\u7f51\u5361\u3001\u78c1\u76d8\u7b49\u7b49<\/li>\n
  3. cpu\u3001\u5185\u5b58\u95ee\u9898\uff0c\u6253\u5f00\u6027\u80fd\u8c03\u8bd5pprof\u5177\u4f53\u8c03\u8bd5cup\u6216\u5185\u5b58<\/li>\n<\/ol>\n

    \u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\uff0c\u901a\u5e38\u662fgoroutine\u6cc4\u6f0f\u6240\u5f15\u8d77\u7684\u3002<\/p>\n

    \u67e5\u770bgoroutine\u6570\u91cf\uff0c\u5982\u679cgoroutine\u6570\u91cf\u8fc7\u591a\uff0c\u53ef\u80fd\u662f\u56e0\u4e3agoroutine\u6ca1\u6709\u53ca\u65f6\u9000\u51fa\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002top\u3001list\u5b9a\u4f4d\u5230\u5177\u4f53\u4ee3\u7801\uff0c\u67e5\u770b\u6b64goroutine\u9000\u51fa\u673a\u5236\u662f\u5426\u6709\u95ee\u9898<\/p>\n

    \u6781\u5c11\u60c5\u51b5\u662f\u4ee3\u7801\u95ee\u9898\u5bfc\u81f4\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u9700\u8981\u8c03\u8bd5\u5185\u5b58\u6027\u80fd\uff0ctop\u547d\u4ee4\u67e5\u770b\u6d88\u8017\u5185\u5b58\u7684\u51fd\u6570 list\u547d\u4ee4\u76f4\u63a5\u5b9a\u4f4d\u76f8\u5173\u6d88\u8017\u5185\u5b58\u7684\u4ee3\u7801<\/p>\n

    cpu\u98d9\u5347\uff0c\u901a\u5e38\u662f\u56e0\u4e3aio\u95ee\u9898\u5bfc\u81f4\u7684\uff0c\u6781\u5c11\u60c5\u51b5\u662f\u4ee3\u7801\u95ee\u9898\uff0c\u5982\u6b7b\u5faa\u73af<\/p>\n

    \u67e5\u770b\u6027\u80fd\u76d1\u63a7\u5982prometheus\uff0c\u5982\u679ccpu wait\u8017\u65f6\uff0c\u5219\u786e\u5b9a\u662fio\u95ee\u9898<\/p>\n

    \u6392\u67e5\u601d\u8def\u4e0e\u4e0a\u9762\u4e00\u6837\uff0ctop\u3001list\u6392\u67e5<\/p>\n

    pprof\u8fd8\u53ef\u4ee5\u6253\u5f00\u53ef\u89c6\u5316\u754c\u9762\u67e5\u770b\uff0c\u7528\u6237\u66f4\u53cb\u597d<\/p>\n

    debugcharts<\/h1>\n

    \n debugcharts \u76d1\u63a7\u5360\u7528\u5185\u5b58\u5927\uff0c\u751f\u4ea7\u73af\u5883\u4e0d\u5efa\u8bae\u5f00\u542f\u3002\n<\/p><\/blockquote>\n

    \u4e00\u4e2a\u53ef\u4ee5\u5b9e\u65f6\u67e5\u770bgolang\u7a0b\u5e8f\u5185\u5b58\u3001CPU\u3001GC\u3001\u534f\u7a0b\u7b49\u53d8\u5316\u60c5\u51b5\u7684\u53ef\u89c6\u5316\u5de5\u5177<\/p>\n

    _ \"github.com\/mkevac\/debugcharts\"\n\ngo func() {\n        log.Println(http.ListenAndServe(\"localhost:8081\", nil))\n    }()\n<\/code><\/pre>\n
    \u8bbf\u95ee\u5730\u5740 localhost:8081\/debug\/charts<\/p>\n
    \"\"<\/p>\n
    \"\"<\/p>\n
    \"\"<\/p>\n
    \"\"<\/p>\n
    prometheus<\/h1>\n
    prometheus \u662f grafana \u7684\u63d2\u4ef6\uff0c\u652f\u6301 go \u76d1\u63a7\u7684\u53ef\u89c6\u5316<\/p>\n
    \"github.com\/prometheus\/client_golang\/prometheus\/promhttp\"\n\ngo func() {\n        http.Handle(\"\/metrics\", promhttp.Handler())\n        log.Println(http.ListenAndServe(\"localhost:8081\", nil))\n    }()\n<\/code><\/pre>\n
    \"\"<\/p>\n
    pprof<\/h1>\n
    \u5f00\u542f<\/h2>\n
    \u5f00\u542fpprof\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u52a0\u5165\u4e0b\u9762\u4ee3\u7801\uff1a<\/p>\n
    import (\n    \"net\/http\"\n    _ \"net\/http\/pprof\"\n)\ngo func() {\n            log.Println(http.ListenAndServe(\"localhost:8081\", nil))\n}()\n<\/code><\/pre>\n
    http:\/\/localhost:8081\/debug\/pprof\/<\/p>\n
    \"\"<\/p>\n
    heap \u5806\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/p>\n
    goroutine \u5f53\u524d\u5728\u8fd0\u884c\u7684goroutine\u60c5\u51b5\u4ee5\u53ca\u603b\u6570<\/p>\n
    profile cpu\u8017\u65f6\uff0c\u4f1a\u8be6\u7ec6\u5217\u51fa\u6bcf\u4e2a\u51fd\u6570\u7684\u597d\u4e8b<\/p>\n
    \u4ea4\u4e92\u547d\u4ee4<\/h2>\n
    # \u751f\u6210 cpu profile\ngo tool pprof http:\/\/localhost:8081\/debug\/pprof\/profile\n\n# \u751f\u6210 heap profile\ngo tool pprof http:\/\/localhost:8081\/debug\/pprof\/heap\n\n# \u751f\u6210 goroutine profile\ngo tool pprof http:\/\/localhost:8081\/debug\/pprof\/goroutine\n\n# \u751f\u6210 block profile\ngo tool pprof http:\/\/localhost:8081\/debug\/pprof\/block\n\n# \u751f\u6210 mutex profile\ngo tool pprof http:\/\/localhost:8081\/debug\/pprof\/mutex\n\n# \u67e5\u770b\u524d20\n(pprof) top 20\n\n# \u76f4\u63a5\u5b9a\u4f4d\u76f8\u5173\u8017\u65f6\u7684\u4ee3\u7801\nlist func_name\n\n# web\u67e5\u770bsvg\n(pprof) web\n\n# \u751f\u6210png\u6587\u4ef6\n(pprof) png\n\n# \u67e5\u770b\u5df2\u7ecf\u4fdd\u5b58\u7684profile\u6587\u4ef6\ngo tool pprof profile \/Users\/xingzhiwei\/pprof\/pprof.samples.cpu.001.pb.gz\n<\/code><\/pre>\n
    \"\"<\/p>\n
    # \u67e5\u770b\u524d20\n(pprof) top 20\n<\/code><\/pre>\n
    [\"\"<\/p>\n
    # \u76f4\u63a5\u5b9a\u4f4d\u76f8\u5173\u8017\u65f6\u7684\u4ee3\u7801\nlist writePacket\n<\/code><\/pre>\n
    [\"\"<\/p>\n
    \"\"<\/p>\n
    # \u5217\u51fa\u51fd\u6570\u8c03\u7528\u6808\n(pprof)traces\n<\/code><\/pre>\n
    \"\"<\/p>\n
    \u53ef\u89c6\u5316\u64cd\u4f5c\u754c\u9762\uff08\u5e26\u706b\u7130\u56fe\uff09<\/h2>\n
    go tool pprof --http=:8082 \/Users\/xingzhiwei\/pprof\/pprof.samples.cpu.004.pb.gz\n<\/code><\/pre>\n
    \"\"<\/p>\n
    \"\"<\/p>\n
    \u89e3\u51b3\u95ee\u9898<\/h2>\n
      \n
    1. cpu\u8fc7\u9ad8<\/li>\n
    2. \u5185\u5b58\u6cc4\u6f0f<\/li>\n
    3. \u7a0b\u5e8f\u6162<\/li>\n
    4. \u9501\u7684\u4e89\u7528<\/li>\n
    5. \u7a0b\u5e8f\u963b\u585e<\/li>\n<\/ol>\n
      \u67e5\u770bcpu profile\uff0c\u805a\u7126\u957f\u8017\u65f6\u51fd\u6570<\/p>\n
      \u5982\u679c\u6709 runtime.mallocgc \u8fd9\u548c\u5185\u5b58\u5206\u914d\u4e0e\u5783\u573e\u56de\u6536\u6709\u5173<\/p>\n
      \u67e5\u627e\u5185\u5b58\u6cc4\u6f0f<\/h2>\n
      \u4f7f\u7528\u5185\u5b58profiling\u4e0d\u80fd\u591f\u53d1\u73b0\u5185\u5b58\u6cc4\u9732<\/strong><\/p>\n
      profiling\u53ea\u8bb0\u5f55\u5bf9\u5185\u5b58\u5206\u914d\u60c5\u51b5\u4ee5\u53ca\u8c03\u7528\u6808\u4fe1\u606f<\/p>\n
      \u4f7f\u7528\u76d1\u63a7\u5de5\u5177 Promethues \u89c2\u5bdf\u5185\u5b58\u8d70\u52bf\uff0c\u53ef\u4ee5\u77e5\u9053\u662f\u5426\u6709\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f<\/p>\n
      \u5185\u5b58\u6cc4\u6f0f\u901a\u5e38\u662f\u56e0\u4e3agoroutine\u6cc4\u6f0f\u6240\u5f15\u8d77\u7684<\/code><\/p>\n
      # \u751f\u6210 heap profile\ngo tool pprof http:\/\/localhost:8081\/debug\/pprof\/heap\n\ntop 5\n\nlist main.main\n<\/code><\/pre>\n
      \"\"<\/p>\n
      (pprof) trace\n#\u6253\u5370\u6240\u6709\u8c03\u7528\u6808\uff0c\u4ee5\u53ca\u8c03\u7528\u6808\u7684\u6307\u6807\u4fe1\u606f\n<\/code><\/pre>\n
      \"\"<\/p>\n
      # -sample_index \u53c2\u6570\uff0c\u53ef\u4ee5\u5207\u6362\u5185\u5b58\u5206\u6790\u7684\u7c7b\u578b\ngo tool pprof -sample_index=alloc_space \/Users\/xingzhiwei\/pprof\/pprof.alloc_objects.alloc_space.inuse_objects.inuse_space.002.pb.gz\n\ngo tool pprof --http=:8082 \/Users\/xingzhiwei\/pprof\/pprof.alloc_objects.alloc_space.inuse_objects.inuse_space.002.pb.gz\n<\/code><\/pre>\n\n\n\n\n\n\n\n\n
      \u7c7b\u578b<\/th>\n\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n
      inuse_space<\/td>\namount of memory allocated and npt released yet<\/td>\n<\/tr>\n
      inuse_objects<\/td>\namount of objects allocated and not released yet<\/td>\n<\/tr>\n
      alloc_space<\/td>\ntotal amount of memory allocated (regardless of released)<\/td>\n<\/tr>\n
      alloc_objects<\/td>\ntotal amount of objects allocated (regardless of released)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \"\"<\/p>\n
      goroutine\u6cc4\u6f0f<\/h2>\n
        \n
      1. \u6bcf\u4e2agoroutine\u53602kb<\/p>\n<\/li>\n
      2. \n
        goroutine\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u6709\u4e9b\u53d8\u91cf\u53ea\u60f3\u5806\u5185\u5b58\uff0cgc\u56de\u8ba4\u4e3a\u5185\u5b58\u4ecd\u7136\u5728\u4f7f\u7528\uff0c\u4e0d\u4f1a\u56de\u6536\uff08\u8fd9\u90e8\u5206heap profile\u80fd\u4f53\u73b0\u51fa\u6765\uff09<\/p>\n
        \n  \u5982\u679c\u4e0d\u77e5\u9053\u4f55\u65f6\u505c\u6b62\u4e00\u4e2agoroutine\uff0c\u8fd9\u4e2agoroutine\u5c31\u662f\u6f5c\u5728\u7684\u5185\u5b58\u6cc4\u9732\n<\/p><\/blockquote>\n<\/li>\n<\/ol>\n
        \u5982\u4f55\u5224\u65ad\u662fgoroutine\u6cc4\u6f0f\u5bfc\u81f4\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u76d1\u63a7goroutine\u6570\u91cf\uff0cgoroutine\u6301\u7eed\u589e\u957f\uff0c\u5219\u53ef\u80fd\u662fgoroutine\u6cc4\u6f0f<\/p>\n
        # \u751f\u6210 goroutine profile\ngo tool pprof http:\/\/localhost:8081\/debug\/pprof\/goroutine\n\ntop\n\n# \u91cd\u590d\u4e24\u6b21\u4ee5\u4e0a\u64cd\u4f5c\uff0c\u770b\u770b\u662f\u54ea\u4e2agoroutine\u6cc4\u6f0f\n\n# \u4e24\u4e2a\u6bd4\u8f83\ngo tool pprof -base pprof.leak_demo.goroutine.001.pb.gz pprof.leak_demo.goroutine.002.pb.gz\n\nlist\n\ngo tool trace trace.out\n\ntraces\n\n\n<\/code><\/pre>\n
        \"\"<\/p>\n
        trace<\/h1>\n
        gc trace<\/h3>\n
          \n
        1. GODEBUG=gctrace=1<\/li>\n<\/ol>\n
          go build main.go -o main\nGODEBUGE=gctrace=1 .\/main\n\nGODEBUG=gctrace=1 go run main.go\n\n# GODEBUG \u53c2\u6570\u8fd8\u6709 schedtrace=1 scheddetail=1 Go Runtime Scheduler \u72b6\u6001\u4fe1\u606f\n<\/code><\/pre>\n
          \"\"<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
          \u5b57\u6bb5<\/th>\n\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n
          gc 1<\/td>\n\u7b2c\u4e00\u4e2agc\u5468\u671f<\/td>\n<\/tr>\n
          @0.005s<\/td>\n\u7a0b\u5e8f\u5f00\u59cb\u540e\u76840.005s<\/td>\n<\/tr>\n
          4%<\/td>\n\u6539gc\u5468\u671f\u4e2dcpu\u7684\u4f7f\u7528\u7387<\/td>\n<\/tr>\n
          0.013<\/td>\n\u6807\u8bb0\u5f00\u59cb\u65f6\uff0cSTW\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff08wall clock\uff09<\/td>\n<\/tr>\n
          0.72<\/td>\n\u6807\u8bb0\u8fc7\u7a0b\u4e2d\uff0c\u5e76\u53d1\u6807\u8bb0\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff08wall clock\uff09<\/td>\n<\/tr>\n
          0.059<\/td>\n\u6807\u8bb0\u7ec8\u6b62\u65f6\uff0cSTW\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff08wall clock\uff09<\/td>\n<\/tr>\n
          0.10<\/td>\n\u6807\u8bb0\u5f00\u59cb\u65f6\uff0cSTW\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff08cpu time\uff09<\/td>\n<\/tr>\n
          0.94<\/td>\n\u6807\u8bb0\u8fc7\u7a0b\u4e2d\uff0c\u6807\u8bb0\u8f85\u52a9\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff08cpu time\uff09<\/td>\n<\/tr>\n
          0.78<\/td>\n\u6807\u8bb0\u8fc7\u7a0b\u4e2d\uff0c\u5e76\u53d1\u6807\u8bb0\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff08cpu time\uff09<\/td>\n<\/tr>\n
          0<\/td>\n\u6807\u8bb0\u8fc7\u7a0b\u4e2d\uff0cgc\u7a7a\u95f2\u7684\u65f6\u95f4\uff08cpu time\uff09<\/td>\n<\/tr>\n
          0.47<\/td>\n\u6807\u8bb0\u7ec8\u6b62\u65f6\uff0cSTW\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff08cpu time\uff09<\/td>\n<\/tr>\n
          4<\/td>\n\u6807\u8bb0\u5f00\u59cb\u65f6\uff0c\u5806\u7684\u5927\u5c0f\u7684\u5b9e\u9645\u503c<\/td>\n<\/tr>\n
          4<\/td>\n\u6807\u8bb0\u7ed3\u675f\u65f6\uff0c\u5806\u7684\u5927\u5c0f\u7684\u5b9e\u9645\u503c<\/td>\n<\/tr>\n
          1<\/td>\n\u6807\u8bb0\u7ed3\u675f\u65f6\uff0c\u6807\u8bb0\u4e3a\u5b58\u6d3b\u7684\u5bf9\u8c61\u5927\u5c0f<\/td>\n<\/tr>\n
          5<\/td>\n\u6807\u8bb0\u7ed3\u675f\u65f6\uff0c\u5806\u7684\u5927\u5c0f\u7684\u9884\u6d4b\u503c<\/td>\n<\/tr>\n
          8<\/td>\nP\u7684\u6570\u91cf<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
          wall clock \u662f\u6307\u5f00\u59cb\u6267\u884c\u5230\u5b8c\u6210\u6240\u7ecf\u5386\u7684\u5b9e\u9645\u65f6\u95f4\uff0c\u5305\u62ec\u5176\u4ed6\u7a0b\u5e8f\u548c\u672c\u7a0b\u5e8f\u6240\u6d88\u8017\u7684\u65f6\u95f4\uff1b<\/p>\n
          cpu time \u662f\u6307\u7279\u5b9a\u7a0b\u5e8f\u4f7f\u7528 cpu \u7684\u65f6\u95f4\uff1b\u5b83\u4eec\u5b58\u5728\u4ee5\u4e0b\u5173\u7cfb\uff1a<\/p>\n
          \n  wall clock < cpu time:\u5145\u5206\u5229\u7528\u591a\u6838<\/p>\n
            wall clock \u2248 cpu time:\u672a\u5e76\u884c\u6267\u884c<\/p>\n
            wall clock > cpu time:\u591a\u6838\u4f18\u52bf\u4e0d\u660e\u663e\n<\/p><\/blockquote>\n
          trace \u5de5\u5177<\/h3>\n
            \n
          1. go tool trace<\/li>\n<\/ol>\n
            f, err := os.Create(\"trace.out\")\n    if err != nil {\n        panic(err)\n    }\n    defer f.Close()\n\n    err = trace.Start(f)\n    if err != nil {\n        panic(err)\n    }\n    defer trace.Stop()\n<\/code><\/pre>\n
            go tool trace trace.out\n<\/code><\/pre>\n
            \"\"<\/p>\n
            \"\"<\/p>\n
            \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"
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