{"id":36347,"date":"2023-10-14T17:26:23","date_gmt":"2023-06-08T16:21:30","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90apache%e3%80%91%e6%9c%89%e5%85%b3prefork%e7%9a%84%e8%ae%a8%e8%ae%ba\/"},"modified":"2024-05-04T04:12:43","modified_gmt":"2024-05-03T20:12:43","slug":"%e3%80%90apache%e3%80%91%e6%9c%89%e5%85%b3prefork%e7%9a%84%e8%ae%a8%e8%ae%ba","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90apache%e3%80%91%e6%9c%89%e5%85%b3prefork%e7%9a%84%e8%ae%a8%e8%ae%ba\/","title":{"rendered":"\u3010Apache\u3011\u6709\u5173prefork\u7684\u8ba8\u8bba"},"content":{"rendered":"

\u6458\u8981<\/h3>\n

\u9884\u5206\u53c9\uff08prefork\uff09\u7684\u8ba8\u8bba\u3002\u4ece\u5bf9\u9884\u5206\u53c9\u662f\u4ec0\u4e48\u7684\u8ba8\u8bba\u5f00\u59cb\u6269\u5c55\u3002<\/p>\n

\u4ece\u4e00\u5f00\u59cb\u5c31\u662fTCP\u901a\u4fe1\u7684\u6d41\u7a0b\u3002<\/h3>\n

\u8981\u5728Linux\u73af\u5883\u4e0b\u5b9e\u73b0TCP\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u901a\u4fe1\uff0c\u670d\u52a1\u5668\u7aef\u9700\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u7b49\u5f85\u901a\u4fe1\u8fde\u63a5\u3002<\/p>\n

socket() -> bind() -> listen() -> accept()<\/p>\n

\u5efa\u7acb\u5957\u63a5\u5b57 -> \u7ed1\u5b9a -> \u76d1\u542c -> \u63a5\u6536<\/p>\n

\u5982\u679c\u662f\u8fd0\u884c\u5728\u5355\u4e00\u8fdb\u7a0b\u4e2d\u7684TCP\u670d\u52a1\u5668\uff0c\u90a3\u4e48\u4e0a\u8ff0\u6b65\u9aa4\u5c31\u8db3\u591f\u4e86\u3002\u4f46\u662f\u5f53\u5ba2\u6237\u7aef\u53d8\u6210\u591a\u4e2a\u65f6\uff0c\u5728\u540c\u65f6\u8fde\u63a5\u65f6\uff0c\u5ba2\u6237\u7aef1\u53ef\u4ee5\u8fde\u63a5\uff0c\u4f46\u5ba2\u6237\u7aef2\u65e0\u6cd5\u8fde\u63a5\u3002<\/p>\n

\u4e3a\u4e86\u652f\u6301\u591a\u4e2a\u5ba2\u6237\u7aef\u7684\u540c\u65f6\u8fde\u63a5\uff0c\u53ef\u4ee5\u4f7f\u7528fork()\u7cfb\u7edf\u8c03\u7528\u3002\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u5728\u7236\u8fdb\u7a0b\u4e2d\u8fdb\u884c\u76d1\u542c(listen)\uff0c\u751f\u6210\u5b50\u8fdb\u7a0b\u5e76\u8ba9\u5b50\u8fdb\u7a0b\u7ee7\u7eed\u5904\u7406\u540e\u7eed\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u7531\u4e8e\u5b50\u8fdb\u7a0b\u7684\u751f\u6210\uff0c\u5355\u4e00\u8fdb\u7a0b\u7684TCP\u670d\u52a1\u5668\u6240\u9762\u4e34\u7684\u95ee\u9898\u5c31\u5f97\u4ee5\u89e3\u51b3\u3002<\/p>\n

\/\/ listen\u307e\u3067\u306f\u89aa\u3067\u3084\u3063\u3066\u304a\u304d\u30eb\u30fc\u30d7\u5185\u3067\u5b50\u30d7\u30ed\u30bb\u30b9\u3092\u751f\u6210\u3057\u901a\u4fe1\u3092\u884c\u3046\u3002<\/span>\r\n  for<\/span> (;;)<\/span> {<\/span>\r\n    len<\/span> =<\/span> sizeof<\/span>(<\/span>client<\/span>);<\/span>\r\n    sock<\/span> =<\/span> accept<\/span>(<\/span>sock0<\/span>,<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>&<\/span>client<\/span>,<\/span> &<\/span>len<\/span>);<\/span>\r\n\r\n    pid<\/span> =<\/span> fork<\/span>();<\/span>\r\n\r\n    if<\/span> (<\/span>pid<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>\r\n      n<\/span> =<\/span> read<\/span>(<\/span>sock<\/span>,<\/span> buf<\/span>,<\/span> sizeof<\/span>(<\/span>buf<\/span>));<\/span>\r\n      if<\/span> (<\/span>n<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n        perror<\/span>(<\/span>\"read\"<\/span>);<\/span>\r\n        return<\/span> 1<\/span>;<\/span>\r\n      }<\/span>\r\n\r\n      write<\/span>(<\/span>sock<\/span>,<\/span> buf<\/span>,<\/span> n<\/span>);<\/span>\r\n      close<\/span>(<\/span>sock<\/span>);<\/span>\r\n\r\n      return<\/span> 0<\/span>;<\/span>\r\n\r\n    }<\/span> \r\n<\/code><\/pre>\n
\u6682\u65f6\u53ea\u9700\u8d76\u7d27\u5199\u51fa\u4e00\u4e2a\u5927\u81f4\u5185\u5bb9\uff0c\u6240\u4ee5\u8be6\u7ec6\u60c5\u51b5\u7701\u7565\u4e86\u3002<\/p>\n
\u5728\u63a5\u53d7\uff08accept\uff09\u4e4b\u540e\u8fdb\u884c\u5206\u53c9\uff08fork\uff09\uff0c\u5957\u63a5\u5b57\uff08socket\uff09\u4f1a\u5728\u7236\u5b50\u8fdb\u7a0b\u4e4b\u95f4\u5171\u4eab\u5417\uff1f<\/h3>\n
    sock<\/span> =<\/span> accept<\/span>(<\/span>sock0<\/span>,<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>&<\/span>client<\/span>,<\/span> &<\/span>len<\/span>);<\/span>\r\n\r\n    pid<\/span> =<\/span> fork<\/span>();<\/span>\r\n\r\n    if<\/span> (<\/span>pid<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>\r\n      n<\/span> =<\/span> read<\/span>(<\/span>sock<\/span>,<\/span> buf<\/span>,<\/span> sizeof<\/span>(<\/span>buf<\/span>));<\/span>\r\n      if<\/span> (<\/span>n<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n        perror<\/span>(<\/span>\"read\"<\/span>);<\/span>\r\n        return<\/span> 1<\/span>;<\/span>\r\n      }<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u90e8\u5206\u4ee3\u7801\u5728fork\u4e4b\u540e\u8f7b\u677e\u5730\u4f7f\u7528\u4e86\u7236\u8fdb\u7a0b\u6253\u5f00\u7684socket\uff0c\u5bf9\u6b64\u4ea7\u751f\u4e86\u7591\u95ee\u3002\u7b54\u6848\u5728\u4e0b\u9762\u7684\u6587\u7ae0\u4e2d\u975e\u5e38\u6e05\u695a\u660e\u4e86\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u6253\u5f00\u6587\u4ef6\u63cf\u8ff0\u7b26\uff08\u4f8b\u5982\u6587\u4ef6\u504f\u79fb\u91cf\u7b49\uff09\u5728fork\u4e4b\u540e\u662f\u88ab\u5171\u4eab\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u4f7f\u7528\u7236\u8fdb\u7a0b\u63a5\u53d7\u7684socket\u8fdb\u884c\u901a\u4fe1\u3002\uff08\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u53ea\u662f\u5171\u4eab\u7684\uff0c\u800c\u4e0d\u662f\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u90fd\u521b\u5efa\u4e86\u81ea\u5df1\u7684socket\uff09\u3002\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u5728\u6211\u8fdb\u884c\u4e86\u4e00\u4e9b\u8c03\u67e5\u540e\u53d1\u73b0\uff0c\u5bf9\u4e8eRuby\u800c\u8a00\uff0c\u5728\u8c03\u7528exec\u65f6\u4f1a\u5173\u95edfd\u3002<\/p>\n
\u5f53\u4f7f\u7528 man \u547d\u4ee4\u6216\u8005 fork(2) \u8fdb\u884c\u641c\u7d22\u65f6\u4f1a\u627e\u5230\u76f8\u5173\u4fe1\u606f\u3002<\/p>\n
\u5b50\u30d7\u30ed\u30bb\u30b9\u306f\u89aa\u30d7\u30ed\u30bb\u30b9\u304c\u6301\u3064 \u30aa\u30fc\u30d7\u30f3\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u96c6\u5408\u306e\u30b3\u30d4\u30fc\u3092\u5f15\u304d\u7d99\u3050\u3002 \u5b50\u30d7\u30ed\u30bb\u30b9\u306e\u5404\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306f\u3001 \u89aa\u30d7\u30ed\u30bb\u30b9\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306b\u5bfe\u5fdc\u3059\u308b \u540c\u3058\u30aa\u30fc\u30d7\u30f3\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0 (file description) \u3092\u53c2\u7167\u3059\u308b (open(2) \u3092\u53c2\u7167)\u3002 \u3053\u308c\u306f 2 \u3064\u306e\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u304c\u3001\u30d5\u30a1\u30a4\u30eb\u72b6\u614b\u30d5\u30e9\u30b0\u30fb \u73fe\u5728\u306e\u30d5\u30a1\u30a4\u30eb\u30aa\u30d5\u30bb\u30c3\u30c8\u3001\u30b7\u30b0\u30ca\u30eb\u99c6\u52d5 (signal-driven) I\/O \u5c5e\u6027 (fcntl(2) \u306b\u304a\u3051\u308b F_SETOWN, F_SETSIG \u306e\u8aac\u660e\u3092\u53c2\u7167) \u3092\u5171\u6709\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u3002\r\n<\/code><\/pre>\n
\u4f7f\u7528fork\u6a21\u578b\u7684TCP\u670d\u52a1\u5668\u6240\u4ea7\u751f\u7684\u95ee\u9898<\/h3>\n
\u5728\u8fd9\u91cc\u53d1\u751ffork(2)\u8017\u8d39\u5f88\u9ad8\u7684\u6210\u672c\u3002\u867d\u7136fork\u9002\u7528\u4e8eCoW\uff0c\u4f46\u8fdb\u7a0b\u7684\u521b\u5efa\u672c\u8eab\u662f\u975e\u5e38\u7e41\u91cd\u7684\u5de5\u4f5c\u3002\u8bf7\u53c2\u8003\u4ee5\u4e0b\u6587\u7ae0\u4e86\u89e3\u66f4\u8be6\u7ec6\u7684\u4fe1\u606f\u3002<\/p>\n
\u90a3\u4e48\u6211\u4eec\u5c06\u8ba8\u8bba\u4e00\u79cd\u5728\u6587\u7ae0\u4e3b\u9898\u4e2d\u4e5f\u63d0\u5230\u7684\u4f7f\u7528prefork\u7684\u65b9\u6cd5\uff0c\u867d\u7136\u751f\u6210\u7ebf\u7a0b\u548c\u4e8b\u4ef6\u9a71\u52a8\u7b49\u65b9\u5f0f\u5f88\u6d41\u884c\u3002\u5982\u679cfork\u7684\u6210\u672c\u5f88\u9ad8\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u8fdb\u884cfork\uff0c\u7136\u540e\u5728\u5ba2\u6237\u7aef\u5230\u6765\u65f6\u4f7f\u7528\u9884\u5148\u751f\u6210\u7684\u5957\u63a5\u5b57\u6765\u63d0\u4f9b\u670d\u52a1\u3002\u5927\u81f4\u7684\u6d41\u7a0b\u5982\u4e0b\u3002<\/p>\n
    \n
  • \n
      \u30bd\u30b1\u30c3\u30c8\u3092\u89aa\u30d7\u30ed\u30bb\u30b9 \u3067\u751f\u6210<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          fork\u3057\u3066\u5b50\u30d7\u30ed\u30bb\u30b9\u3092\u4f5c\u308b<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \u5b50\u30d7\u30ed\u30bb\u30b9\u304c\u305d\u308c\u305e\u308caccept\u5f85\u3061\u3067block\u3059\u308b(\u51e6\u7406\u304c\u6b63\u5e38\u306b\u5b8c\u4e86\u3057\u305f\u5834\u5408\u3001\u53d7\u3051\u4ed8\u3051\u305f\u30bd\u30b1\u30c3\u30c8\u306e \u8a18\u8ff0\u5b50\u3067\u3042\u308b\u975e\u8ca0\u6574\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002)<\/ul>\n
            \u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u72b6\u6001\u3002\u5728\u6b64\u72b6\u6001\u4e0b\uff0c\u963b\u585e\u5728\u7b2c\u4e09\u4e2aaccept\u7684\u5b50\u8fdb\u7a0b\u53ea\u4f1a\u5524\u9192\u5176\u4e2d\u4e00\u4e2a\u8fdb\u7a0b\u6765\u5904\u7406\u5ba2\u6237\u7aef\u7684\u5230\u6765\uff0c\u5e76\u4e14\u5524\u9192\u540e\u7684\u8fdb\u7a0b\u53ef\u4ee5\u8fdb\u884c\u540e\u7eed\u7684\u901a\u4fe1\u3002\u6b64\u65f6\u5ba2\u6237\u7aef\u7684\u6700\u5927\u5e76\u53d1\u8fde\u63a5\u6570\u5c06\u7b49\u4e8efork\u7684\u6570\u76ee\u3002\u5982\u679c\u60f3\u8981\u67091000\u4e2a\u7528\u6237\u8fde\u63a5\uff0c\u5c31\u9700\u89811000\u4e2a\u8fdb\u7a0b\u3002\u8fd9\u6d89\u53ca\u5230C10k\u95ee\u9898\u3002<\/p>\n
            Nginx\u5728\u5904\u7406\u5927\u91cf\u8bbf\u95ee\u65f6\u53ea\u9700\u8981\u5c11\u91cf\u7684\u8fdb\u7a0b\uff08\u5185\u90e8\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\uff09\u6765\u5904\u7406\uff0c\u5b83\u4e0d\u662f\u901a\u8fc7prefork\u6216\u7ebf\u7a0b\uff0c\u800c\u662f\u901a\u8fc7\u4e8b\u4ef6\u9a71\u52a8\u6765\u8fdb\u884c\u5904\u7406\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u6bcf\u4e2aworker\u4f1a\u76d1\u89c6\u4e8b\u4ef6\u5e76\u8fdb\u884c\u9010\u4e2a\u5904\u7406\uff0c\u4ee5\u51cf\u5c11\u4e0a\u4e0b\u6587\u5207\u6362\u7b49\u95ee\u9898\u3002\u56e0\u4e3a\u8fd9\u4e0e\u4e3b\u9898\u65e0\u5173\uff0c\u6240\u4ee5\u5c31\u5148\u8bf4epoll(2)\u975e\u5e38\u5f3a\u5927\u7136\u540e\u505c\u6b62\u5427\u3002<\/p>\n
            \u5728\u540c\u4e00\u4e2a\u5957\u63a5\u5b57\u4e0a\u540c\u65f6\u4ece\u591a\u4e2a\u8fdb\u7a0b\u8fdb\u884caccept\u662f\u5b89\u5168\u7684\u5417\uff1f<\/h3>\n
            \u603b\u800c\u8a00\u4e4b\uff0c\u542c\u8d77\u6765\u5e94\u8be5\u6ca1\u95ee\u9898\u3002\u867d\u7136\u6211\u6ca1\u6709\u770b\u8fc7\u6e90\u4ee3\u7801\uff0c\u4f46\u4f3c\u4e4e\u5185\u6838\u4f1a\u4e3a\u6b64\u5904\u7406\u597d\u3002\u636e\u8bf4\u65e7\u7248\u672c\u7684\u5185\u6838\u4f1a\u51fa\u73b0\u96f7\u96e8\u6548\u5e94\u7b49\u95ee\u9898\u3002\uff08\u4f3c\u4e4e\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u8fd8\u4f1a\u5728\u5e94\u7528\u5c42\u5b9e\u73b0acceptmutex\uff0c\u65e7\u7248\u672c\u7684apache\u4f3c\u4e4e\u5c31\u662f\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u8fdb\u884c\u6392\u4ed6\u5904\u7406\u7684\u3002\uff09<\/p>\n
            \u989d\u5916\u9009\u98791\uff1aGracefull shutdown\u7684\u5b9e\u73b0\u5177\u4f53\u662f\u600e\u6837\u7684\uff1f<\/h3>\n
            \u5982\u679c\u8981\u5b9a\u4e49”\u4f18\u96c5\u5173\u95ed”\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u65b9\u5f0f<\/p>\n
              \n
            • \n
                \u505c\u6b62\u6307\u793a\u5f8c\u306b\u3001\u65b0\u3057\u3044\u63a5\u7d9a\u3092\u53d7\u4ed8\u3057\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n
                 <\/p>\n
                  \u6b8b\u3063\u305f\u51e6\u7406\u4e2d\u306e\u63a5\u7d9a\u304c\u5b8c\u4e86\u3059\u308b\u306e\u3092\u5f85\u3063\u3066\u304b\u3089\u3001\u30d7\u30ed\u30bb\u30b9\u3092\u5b89\u5168\u306b\u505c\u6b62\u3059\u308b<\/ul>\n
                  \u5982\u679c\u5728TCP\u5c42\u9762\u64cd\u4f5c\uff0c\u6211\u4eec\u7684\u4efb\u52a1\u662f\u5173\u95ed\u76d1\u542c\u5957\u63a5\u5b57\uff0c\u4e0d\u518d\u63a5\u53d7\u65b0\u7684\u8fde\u63a5\u3002<\/p>\n
                  \u5b50\u8fdb\u7a0b\u6839\u636e\u6536\u5230\u7684\u4fe1\u53f7\u6765\u5b9e\u73b0\u5b89\u5168\u505c\u6b62\u5e76\u7ed3\u675f\u5904\u7406\u3002<\/p>\n
                  \u770b\u8d77\u6765\u662f\u8fd9\u6837\u7684\u3002\u4ee5Nginx\u4e3a\u4f8b\uff08\u975e\u5e38\u7b80\u5316\u5730\u63cf\u8ff0\u4e86\u4e00\u4e0b\uff09\u3002<\/p>\n
                  static<\/span> void<\/span>\r\nngx_worker_process_cycle<\/span>(<\/span>ngx_cycle_t<\/span> *<\/span>cycle<\/span>,<\/span> void<\/span> *<\/span>data<\/span>)<\/span>\r\n{<\/span>\r\n    for<\/span> (<\/span> ;;<\/span> )<\/span> {<\/span>\r\n        \/\/ SIG_QUIT\u3092\u53d7\u3051\u53d6\u3063\u305f\u5b50\u30d7\u30ed\u30bb\u30b9\u306f\u4ee5\u4e0b\u306b\u5165\u308b<\/span>\r\n        if<\/span> (<\/span>ngx_quit<\/span>)<\/span> {<\/span>\r\n            ngx_quit<\/span> =<\/span> 0<\/span>;<\/span>\r\n            ngx_log_error<\/span>(<\/span>NGX_LOG_NOTICE<\/span>,<\/span> cycle<\/span>-><\/span>log<\/span>,<\/span> 0<\/span>,<\/span>\r\n                          \"gracefully shutting down\"<\/span>);<\/span>\r\n            ngx_setproctitle<\/span>(<\/span>\"worker process is shutting down\"<\/span>);<\/span>\r\n\r\n            if<\/span> (<\/span>!<\/span>ngx_exiting<\/span>)<\/span> {<\/span>\r\n                ngx_exiting<\/span> =<\/span> 1<\/span>;<\/span>  \/\/ \u7d42\u4e86\u30d5\u30e9\u30b0\u3092\u7acb\u3066\u308b<\/span>\r\n                ngx_set_shutdown_timer<\/span>(<\/span>cycle<\/span>);<\/span> \/\/ shutdown\u30bf\u30a4\u30de\u30fc\u3092\u8a2d\u5b9a\u3059\u308b<\/span>\r\n                ngx_close_listening_sockets<\/span>(<\/span>cycle<\/span>);<\/span> \/\/ \u30ea\u30b9\u30cb\u30f3\u30b0\u30bd\u30b1\u30c3\u30c8\u3092close\u3059\u308b<\/span>\r\n                ngx_close_idle_connections<\/span>(<\/span>cycle<\/span>);<\/span> \/\/ \u30a2\u30a4\u30c9\u30eb\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092close\u3059\u308b<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n        \/\/ \u7d42\u4e86\u30d5\u30e9\u30b0\u304c\u7acb\u3063\u3066\u3044\u308b\u306e\u3067\u4ee5\u4e0b\u306b\u5165\u308b<\/span>\r\n        if<\/span> (<\/span>ngx_exiting<\/span>)<\/span> {<\/span>\r\n            if<\/span> (<\/span>ngx_event_no_timers_left<\/span>()<\/span> ==<\/span> NGX_OK<\/span>)<\/span> {<\/span> \/\/ ngx_event_no_timers_left\u306f\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u63a5\u7d9a\u304c\u3042\u308b\u9650\u308a\u306fOK\u306b\u306a\u3089\u306a\u3044<\/span>\r\n                ngx_worker_process_exit<\/span>(<\/span>cycle<\/span>);<\/span>  \/\/ \u7d42\u4e86\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                  \u5982\u679cngx_event_no_timers_left\u6ca1\u6709\u76d1\u89c6\u5230\u6d3b\u52a8\u8fde\u63a5\uff0c\u5219\u8fdb\u7a0b\u5c06\u7ec8\u6b62\u3002\u9605\u8bfb\u65f6\u6211\u610f\u8bc6\u5230\uff0c\u5982\u679c\u5728\u540e\u7aef\u5e94\u7528\u7a0b\u5e8f\u7684\u67d0\u4e2a\u5730\u65b9\u51fa\u73b0\u95ee\u9898\uff0cNginx\u672c\u8eab\u7684\u5904\u7406\u4e5f\u6ca1\u6709\u8bbe\u7f6e\u8d85\u65f6\uff0c\u90a3\u4e48\u5b83\u5c06\u6c38\u8fdc\u65e0\u6cd5\u8fd0\u884c\u3002\u603b\u7684\u6765\u8bf4\uff0c\u8fd9\u662f\u4e00\u4e2a\u5e94\u8be5\u7531\u5e94\u7528\u7a0b\u5e8f\u65b9\u9762\u89e3\u51b3\u7684\u95ee\u9898\uff0c\u4e0d\u8fc7\u8fdf\u65e9\u4f1a\u9047\u5230\u7c7b\u4f3c\u7684\u60c5\u51b5\u3002ngx_event_no_timers_left\u5c31\u662f\u8fd9\u6837\u7684\u4e00\u4e2a\u70b9\u3002\u5b83\u4f1a\u68c0\u67e5\u4e8b\u4ef6\u6811\uff0c\u5e76\u4e14\u5982\u679c\u6ca1\u6709\u672a\u5904\u7406\u7684\u4e8b\u4ef6\uff0c\u5c31\u4f1a\u5411\u8c03\u7528\u8005\u8fd4\u56deOK\u3002\u8fd9\u6b21\uff0c\u5982\u679c\u6536\u5230OK\uff0cNginx\u8fdb\u7a0b\u5c06\u6b63\u5e38\u7ec8\u6b62\uff0c\u4ee5\u5b9e\u73b0Graceful shutdown\u3002<\/p>\n
                  ngx_int_t<\/span>\r\nngx_event_no_timers_left<\/span>(<\/span>void<\/span>)<\/span>\r\n{<\/span>\r\n    ngx_event_t<\/span>        *<\/span>ev<\/span>;<\/span>\r\n    ngx_rbtree_node_t<\/span>  *<\/span>node<\/span>,<\/span> *<\/span>root<\/span>,<\/span> *<\/span>sentinel<\/span>;<\/span>\r\n\r\n    sentinel<\/span> =<\/span> ngx_event_timer_rbtree<\/span>.<\/span>sentinel<\/span>;<\/span>\r\n    root<\/span> =<\/span> ngx_event_timer_rbtree<\/span>.<\/span>root<\/span>;<\/span>\r\n\r\n    \/\/ \u30a4\u30d9\u30f3\u30c8\u3092\u7ba1\u7406\u3057\u3066\u3044\u308b\u6728\u304croot = sentinel node\u306a\u3089OK\u3092\u8fd4\u3059<\/span>\r\n    if<\/span> (<\/span>root<\/span> ==<\/span> sentinel<\/span>)<\/span> {<\/span>\r\n        return<\/span> NGX_OK<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    for<\/span> (<\/span>node<\/span> =<\/span> ngx_rbtree_min<\/span>(<\/span>root<\/span>,<\/span> sentinel<\/span>);<\/span>\r\n         node<\/span>;<\/span>\r\n         node<\/span> =<\/span> ngx_rbtree_next<\/span>(<\/span>&<\/span>ngx_event_timer_rbtree<\/span>,<\/span> node<\/span>))<\/span>\r\n    {<\/span>\r\n        ev<\/span> =<\/span> (<\/span>ngx_event_t<\/span> *<\/span>)<\/span> ((<\/span>char<\/span> *<\/span>)<\/span> node<\/span> -<\/span> offsetof<\/span>(<\/span>ngx_event_t<\/span>,<\/span> timer<\/span>));<\/span>\r\n\r\n        \/\/ cancel\u4e0d\u53ef\u80fd\u72b6\u614b\u306e\u30a4\u30d9\u30f3\u30c8\u304c\u3042\u308c\u3070\u7d42\u4e86\u3055\u305b\u306a\u3044<\/span>\r\n        if<\/span> (<\/span>!<\/span>ev<\/span>-><\/span>cancelable<\/span>)<\/span> {<\/span>\r\n            return<\/span> NGX_AGAIN<\/span>;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    return<\/span> NGX_OK<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                  \u6839\u636e ngx_rbtree_* \u8fd9\u4e2a\u547d\u540d\uff0c\u6211\u4eec\u53ef\u4ee5\u60f3\u8c61\u5230\u8be5\u4e8b\u4ef6\u72b6\u6001\u662f\u901a\u8fc7\u7ea2\u9ed1\u6811\u6765\u7ef4\u62a4\u7684\u3002\u6211\u77e5\u9053\u5b83\u662f\u4e00\u79cd\u5e73\u8861\u4e8c\u53c9\u6811\uff0c\u4f46\u662f\u5177\u4f53\u7ec6\u8282\u6211\u4e00\u65e0\u6240\u77e5\uff0c\u6211\u8981\u53bb\u8c03\u67e5\u4e00\u4e0b…<\/p>\n","protected":false},"excerpt":{"rendered":"
                  \u6458\u8981 \u9884\u5206\u53c9\uff08prefork\uff09\u7684\u8ba8\u8bba\u3002\u4ece\u5bf9\u9884\u5206\u53c9\u662f\u4ec0\u4e48\u7684\u8ba8\u8bba\u5f00\u59cb\u6269\u5c55\u3002 \u4ece\u4e00\u5f00\u59cb\u5c31\u662fTCP\u901a\u4fe1\u7684\u6d41\u7a0b\u3002 \u8981\u5728L […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-36347","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u3010Apache\u3011\u6709\u5173prefork\u7684\u8ba8\u8bba - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010apache\u3011\u6709\u5173prefork\u7684\u8ba8\u8bba\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Apache\u3011\u6709\u5173prefork\u7684\u8ba8\u8bba\" \/>\n<meta property=\"og:description\" content=\"\u6458\u8981 \u9884\u5206\u53c9\uff08prefork\uff09\u7684\u8ba8\u8bba\u3002\u4ece\u5bf9\u9884\u5206\u53c9\u662f\u4ec0\u4e48\u7684\u8ba8\u8bba\u5f00\u59cb\u6269\u5c55\u3002 \u4ece\u4e00\u5f00\u59cb\u5c31\u662fTCP\u901a\u4fe1\u7684\u6d41\u7a0b\u3002 \u8981\u5728L […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010apache\u3011\u6709\u5173prefork\u7684\u8ba8\u8bba\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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