{"id":3223,"date":"2011-08-28T01:09:40","date_gmt":"2011-08-27T17:09:40","guid":{"rendered":"http:\/\/edsionte.com\/techblog\/?p=3223"},"modified":"2012-11-18T21:51:08","modified_gmt":"2012-11-18T13:51:08","slug":"%e7%ba%bf%e7%a8%8b%e7%9a%84%e9%82%a3%e4%ba%9b%e4%ba%8b%e5%84%bf","status":"publish","type":"post","link":"http:\/\/edsionte.com\/techblog\/archives\/3223","title":{"rendered":"\u7ebf\u7a0b\u7684\u90a3\u4e9b\u4e8b\u513f"},"content":{"rendered":"

1.\u7ebf\u7a0b<\/h3>\n

\u901a\u8fc7\u64cd\u4f5c\u7cfb\u7edf\u539f\u7406\u8bfe\uff0c\u6211\u4eec\u77e5\u9053\u8fdb\u7a0b\u662f\u7cfb\u7edf\u8d44\u6e90\u5206\u914d\u7684\u57fa\u672c\u5355\u4f4d\uff0c\u7ebf\u7a0b\u662f\u7a0b\u5e8f\u72ec\u7acb\u8fd0\u884c\u7684\u57fa\u672c\u5355\u4f4d\u3002\u7ebf\u7a0b\u6709\u65f6\u5019\u4e5f\u88ab\u79f0\u4f5c\u5c0f\u578b\u8fdb\u7a0b\uff0c\u9996\u5148\uff0c\u8fd9\u662f\u56e0\u4e3a\u591a\u4e2a\u7ebf\u7a0b\u4e4b\u95f4\u662f\u53ef\u4ee5\u5171\u4eab\u8d44\u6e90\u7684\uff1b\u5176\u6b21\uff0c\u591a\u4e2a\u7ebf\u7a0b\u4e4b\u95f4\u7684\u5207\u6362\u6240\u82b1\u8d39\u7684\u4ee3\u4ef7\u8fdc\u8fdc\u6bd4\u8fdb\u7a0b\u4f4e\u3002<\/p>\n

\u5728\u7528\u6237\u6001\u4e0b\uff0c\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u7ebf\u7a0b\u64cd\u4f5c\u63a5\u53e3\u5373\u4e3aPOSIX\u7ebf\u7a0b\u63a5\u53e3\uff0c\u5373pthread\u3002\u901a\u8fc7\u8fd9\u7ec4\u63a5\u53e3\u53ef\u4ee5\u8fdb\u884c\u7ebf\u7a0b\u7684\u521b\u5efa\u4ee5\u53ca\u591a\u7ebf\u7a0b\u4e4b\u95f4\u7684\u5e76\u53d1\u63a7\u5236\u7b49\u3002<\/p>\n

2.\u8f7b\u91cf\u7ea7\u8fdb\u7a0b<\/h3>\n

\u5982\u679c\u5185\u6838\u8981\u5bf9\u7ebf\u7a0b\u8fdb\u884c\u8c03\u5ea6\uff0c\u90a3\u4e48\u7ebf\u7a0b\u5fc5\u987b\u50cf\u8fdb\u7a0b\u90a3\u6837\u5728\u5185\u6838\u4e2d\u5bf9\u5e94\u4e00\u4e2a\u6570\u636e\u7ed3\u6784\u3002\u8fdb\u7a0b\u5728\u5185\u6838\u4e2d\u6709\u76f8\u5e94\u7684\u8fdb\u7a0b\u63cf\u8ff0\u7b26\uff0c\u5373task_struct\u7ed3\u6784\u3002\u4e8b\u5b9e\u4e0a\uff0c\u4eceLinux\u5185\u6838\u7684\u89d2\u5ea6\u800c\u8a00\uff0c\u5e76\u4e0d\u5b58\u5728\u7ebf\u7a0b\u8fd9\u4e2a\u6982\u5ff5\u3002\u5185\u6838\u5bf9\u7ebf\u7a0b\u5e76\u6ca1\u6709\u8bbe\u7acb\u7279\u522b\u7684\u6570\u636e\u7ed3\u6784\uff0c\u800c\u662f\u4e0e\u8fdb\u7a0b\u4e00\u6837\u4f7f\u7528task_struct\u7ed3\u6784\u8fdb\u884c\u63cf\u8ff0\u3002\u4e5f\u5c31\u662f\u8bf4\u7ebf\u7a0b\u5728\u5185\u6838\u4e2d\u4e5f\u662f\u4ee5\u4e00\u4e2a\u8fdb\u7a0b\u800c\u5b58\u5728\u7684\uff0c\u53ea\u4e0d\u8fc7\u5b83\u6bd4\u8f83\u7279\u6b8a\uff0c\u5b83\u548c\u540c\u7c7b\u7684\u8fdb\u7a0b\u5171\u4eab\u67d0\u4e9b\u8d44\u6e90\uff0c\u6bd4\u5982\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\uff0c\u8fdb\u7a0b\u7684\u4fe1\u53f7\uff0c\u6253\u5f00\u7684\u6587\u4ef6\u7b49\u3002\u6211\u4eec\u5c06\u8fd9\u7c7b\u7279\u6b8a\u7684\u8fdb\u7a0b\u79f0\u4e4b\u4e3a\u8f7b\u91cf\u7ea7\u8fdb\u7a0b\uff08Light Weight Process\uff09\u3002<\/p>\n

\u6309\u7167\u8fd9\u79cd\u7ebf\u7a0b\u673a\u5236\u7684\u7406\u89e3\uff0c\u6bcf\u4e2a\u7528\u6237\u6001\u7684\u7ebf\u7a0b\u90fd\u548c\u5185\u6838\u4e2d\u7684\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u8fdb\u7a0b\u76f8\u5bf9\u5e94\u3002\u591a\u4e2a\u8f7b\u91cf\u7ea7\u8fdb\u7a0b\u4e4b\u95f4\u5171\u4eab\u8d44\u6e90\uff0c\u4ece\u800c\u4f53\u73b0\u4e86\u591a\u7ebf\u7a0b\u4e4b\u95f4\u8d44\u6e90\u5171\u4eab\u7684\u7279\u6027\u3002\u540c\u65f6\u8fd9\u4e9b\u8f7b\u91cf\u7ea7\u8fdb\u7a0b\u8ddf\u666e\u901a\u8fdb\u7a0b\u4e00\u6837\u7531\u5185\u6838\u8fdb\u884c\u72ec\u7acb\u8c03\u5ea6\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u591a\u4e2a\u8fdb\u7a0b\u4e4b\u95f4\u7684\u5e76\u53d1\u6267\u884c\u3002<\/p>\n

3.POSIX\u7ebf\u7a0b\u5e93\u7684\u5b9e\u73b0<\/h3>\n

\u7528\u6237\u7ebf\u7a0b\u548c\u5185\u6838\u4e2d\u8f7b\u91cf\u7ea7\u8fdb\u7a0b\u7684\u5173\u8054\u901a\u5e38\u5b9e\u5728\u7b26\u5408POSIX\u7ebf\u7a0b\u6807\u51c6\u7684\u7ebf\u7a0b\u5e93\u4e2d\u5b8c\u6210\u7684\u3002\u652f\u6301\u8f7b\u91cf\u7ea7\u8fdb\u7a0b\u7684\u7ebf\u7a0b\u5e93\u6709\u4e09\u4e2a\uff1aLinuxThreads\u3001NGPT\uff08Next-Generation POSIX Threads\uff09\u548cNPTL\uff08Native POSIX Thread Library\uff09\u3002\u7531\u4e8eLinuxThreads\u5e76\u4e0d\u80fd\u5b8c\u5168\u517c\u5bb9POSIX\u6807\u51c6\u4ee5\u53caNGPT\u7684\u653e\u5f03\uff0c\u76ee\u524dLinux\u4e2d\u6240\u91c7\u7528\u7684\u7ebf\u7a0b\u5e93\u5373\u4e3aNPTL\u3002<\/p>\n

4.\u7ebf\u7a0b\u7ec4<\/h3>\n

POSIX\u6807\u51c6\u89c4\u5b9a\u5728\u4e00\u4e2a\u591a\u7ebf\u7a0b\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6240\u6709\u7ebf\u7a0b\u90fd\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684PID\u3002\u4ece\u7ebf\u7a0b\u5728\u5185\u6838\u4e2d\u7684\u5b9e\u73b0\u53ef\u5f97\u77e5\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u5176\u5b9e\u90fd\u6709\u81ea\u5df1\u7684pid\u3002\u4e3a\u6b64\uff0cLinux\u5f15\u5165\u4e86\u7ebf\u7a0b\u7ec4\u7684\u6982\u5ff5\u3002\u5728\u4e00\u4e2a\u591a\u7ebf\u7a0b\u7684\u7a0b\u5e8f\u4e2d\uff0c\u6240\u6709\u7ebf\u7a0b\u5f62\u6210\u4e00\u4e2a\u7ebf\u7a0b\u7ec4\u3002\u6bcf\u4e00\u4e2a\u7ebf\u7a0b\u901a\u5e38\u662f\u7531\u4e3b\u7ebf\u7a0b\u521b\u5efa\u7684\uff0c\u4e3b\u7ebf\u7a0b\u5373\u4e3a\u8c03\u7528pthread_create()\u7684\u7ebf\u7a0b\u3002\u56e0\u6b64\u8be5\u7ebf\u7a0b\u7ec4\u4e2d\u6240\u6709\u7ebf\u7a0b\u7684pid\u5373\u4e3a\u4e3b\u7ebf\u7a0b\u7684pid\u3002<\/p>\n

\u5bf9\u4e8e\u7ebf\u7a0b\u7ec4\u4e2d\u7684\u7ebf\u7a0b\u6765\u8bf4\uff0c\u5176task_struct\u7ed3\u6784\u4e2d\u7684tpid\u5b57\u6bb5\u4fdd\u5b58\u8be5\u7ebf\u7a0b\u7ec4\u4e2d\u4e3b\u7ebf\u7a0b\u7684pid\uff0c\u800cpid\u5b57\u6bb5\u5219\u4fdd\u5b58\u6bcf\u4e2a\u8f7b\u91cf\u7ea7\u8fdb\u7a0b\u7684\u672c\u8eab\u7684pid\u3002\u5bf9\u4e8e\u666e\u901a\u7684\u8fdb\u7a0b\u800c\u8a00\uff0ctgid\u548cpid\u662f\u76f8\u540c\u7684\u3002\u4e8b\u5b9e\u4e0a\uff0cgetpid()\u7cfb\u7edf\u8c03\u7528\u4e2d\u8fd4\u56de\u7684\u662f\u8fdb\u7a0b\u7684tgid\u800c\u4e0d\u662fpid\u3002<\/p>\n

5.\u5185\u6838\u7ebf\u7a0b<\/h3>\n

\u4e0a\u9762\u6240\u63cf\u8ff0\u7684\u90fd\u662f\u7528\u6237\u6001\u4e0b\u7684\u7ebf\u7a0b\uff0c\u800c\u5728\u5185\u6838\u4e2d\u8fd8\u6709\u4e00\u79cd\u7279\u6b8a\u7684\u7ebf\u7a0b\uff0c\u79f0\u4e4b\u4e3a\u5185\u6838\u7ebf\u7a0b\uff08Kernel Thread\uff09\u3002\u7531\u4e8e\u5728\u5185\u6838\u4e2d\u8fdb\u7a0b\u548c\u7ebf\u7a0b\u4e0d\u505a\u533a\u5206\uff0c\u56e0\u6b64\u4e5f\u53ef\u4ee5\u5c06\u5176\u79f0\u4e3a\u5185\u6838\u8fdb\u7a0b\u3002\u6beb\u65e0\u7591\u95ee\uff0c\u5185\u6838\u7ebf\u7a0b\u5728\u5185\u6838\u4e2d\u4e5f\u662f\u901a\u8fc7task_struct\u7ed3\u6784\u6765\u8868\u793a\u7684\u3002<\/p>\n

\u5185\u6838\u7ebf\u7a0b\u548c\u666e\u901a\u8fdb\u7a0b\u4e00\u6837\u4e5f\u662f\u5185\u6838\u8c03\u5ea6\u7684\u5b9e\u4f53\uff0c\u53ea\u4e0d\u8fc7\u4ed6\u4eec\u6709\u4ee5\u4e0b\u4e0d\u540c\uff1a<\/p>\n

1).\u5185\u6838\u7ebf\u7a0b\u6c38\u8fdc\u90fd\u8fd0\u884c\u5728\u5185\u6838\u6001\uff0c\u800c\u4e0d\u540c\u8fdb\u7a0b\u65e2\u53ef\u4ee5\u8fd0\u884c\u5728\u7528\u6237\u6001\u4e5f\u53ef\u4ee5\u8fd0\u884c\u5728\u5185\u6838\u6001\u3002\u4ece\u53e6\u4e00\u4e2a\u89d2\u5ea6\u8bb2\uff0c\u5185\u6838\u7ebf\u7a0b\u53ea\u80fd\u4e4b\u7528\u5927\u4e8ePAGE_OFFSET\uff08\u53733GB\uff09\u7684\u5730\u5740\u7a7a\u95f4\uff0c\u800c\u666e\u901a\u8fdb\u7a0b\u5219\u53ef\u4ee5\u4f7f\u7528\u6574\u4e2a4GB\u7684\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n

2).\u5185\u6838\u7ebf\u7a0b\u53ea\u80fd\u8c03\u7528\u5185\u6838\u51fd\u6570\uff0c\u800c\u666e\u901a\u8fdb\u7a0b\u5fc5\u987b\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528\u624d\u80fd\u4f7f\u7528\u5185\u6838\u51fd\u6570\u3002<\/p>\n

\u00a0\u53c2\u8003\uff1a<\/strong><\/p>\n

1. \u6df1\u5165\u7406\u89e3Linux\u5185\u6838 \u7b2c\u4e09\u7248<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

1.\u7ebf\u7a0b \u901a\u8fc7\u64cd\u4f5c\u7cfb\u7edf\u539f\u7406\u8bfe\uff0c\u6211\u4eec\u77e5\u9053\u8fdb\u7a0b\u662f\u7cfb\u7edf\u8d44\u6e90\u5206\u914d\u7684\u57fa\u672c\u5355\u4f4d\uff0c\u7ebf\u7a0b\u662f\u7a0b\u5e8f\u72ec\u7acb\u8fd0\u884c\u7684\u57fa\u672c\u5355\u4f4d\u3002\u7ebf\u7a0b\u6709\u65f6\u5019\u4e5f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[246],"tags":[248,247],"class_list":["post-3223","post","type-post","status-publish","format-standard","hentry","category-posix","tag-posix","tag-pthread"],"views":43430,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/3223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=3223"}],"version-history":[{"count":0,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/3223\/revisions"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=3223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=3223"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=3223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}