{"id":204496,"date":"2025-05-29T09:58:14","date_gmt":"2025-05-29T01:58:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204496\/"},"modified":"2025-05-29T09:58:14","modified_gmt":"2025-05-29T01:58:14","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-python-%e8%bf%9b%e7%a8%8b%e6%b1%a0%e4%b8%ad%e5%88%9b%e5%bb%ba%e5%ad%90%e8%bf%9b%e7%a8%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204496\/","title":{"rendered":"\u5982\u4f55\u5728 Python \u8fdb\u7a0b\u6c60\u4e2d\u521b\u5efa\u5b50\u8fdb\u7a0b\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u5728 Python \u8fdb\u7a0b\u6c60\u4e2d\u521b\u5efa\u5b50\u8fdb\u7a0b\uff1f<\/h1>\n<p>\u5728\u6587\u7ae0\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u5982\u4f55\u5728 Python \u8fdb\u7a0b\u6c60\u4e2d\u521b\u5efa\u5b50\u8fdb\u7a0b\uff1f\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241109\/1731114593672eb66185f05.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5728 python \u8fdb\u7a0b\u6c60\u4e2d\u521b\u5efa\u5b50\u8fdb\u7a0b<\/strong><\/p>\n<p>\u5728\u4f7f\u7528\u8fdb\u7a0b\u6c60\u5e76\u884c\u5904\u7406\u4efb\u52a1\u65f6\uff0c\u6709\u65f6\u6211\u4eec\u9700\u8981\u5728\u5b50\u8fdb\u7a0b\u4e2d\u521b\u5efa\u65b0\u7684\u5b50\u8fdb\u7a0b\u3002\u7136\u800c\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u8fdb\u7a0b\u6c60\u5185\u7684\u8fdb\u7a0b\u65e0\u6cd5\u521b\u5efa\u5b50\u8fdb\u7a0b\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u89e3\u51b3\u8fd9\u4e00\u9650\u5236\u3002<\/p>\n<p><strong>\u4f7f\u7528 multiprocessing.forkserver \u6a21\u5757<\/strong><\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 multiprocessing.forkserver \u6a21\u5757\u6765\u5141\u8bb8\u8fdb\u7a0b\u6c60\u4e2d\u7684\u8fdb\u7a0b\u521b\u5efa\u5b50\u8fdb\u7a0b\u3002\u8be5\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u4e2a shim\uff0c\u5141\u8bb8\u7236\u8fdb\u7a0b\u5c06\u4efb\u52a1\u5206\u53d1\u7ed9\u5b50\u8fdb\u7a0b\uff0c\u800c\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u5728\u5176\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\u4e2d\u521b\u5efa\u5b50\u8fdb\u7a0b\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4fee\u6539\u540e\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>from multiprocessing import Pool, Process, forkserver\nimport time\n\n\ndef print_run(msg):\n    print('msg.%s' % msg)\n    time.sleep(2)\n\n\ndef print_log(msg):\n    p = Process(target=print_run,\n                args=(msg,))\n    p.start()\n    p.join()\n    print('msg is : %s' % msg)\n    time.sleep(1)\n\n\ndef set_multprocess():\n    # \u4f7f\u7528 forkserver \u6765\u5141\u8bb8\u5b50\u8fdb\u7a0b\u521b\u5efa\u5b50\u8fdb\u7a0b\n    forkserver.start(set_forkserver_parallelism)\n\n    pool = Pool(processes=10)\n    for i in range(20):\n        pool.apply_async(func=print_log, args=(str(i),))\n\n    pool.close()\n    pool.join()\n    print('finished')\n\n\n# \u8bbe\u7f6e forkserver \u7684\u5e76\u884c\u5ea6\ndef set_forkserver_parallelism(n):\n    \"\"\"Set the parallelism to be n * number of processes.\"\"\"\n    n = max(n, 1)\n    forkserver.set_forkserver_ parallelism(n)\n\nif __name__ == '__main__':\n    set_multprocess()<\/pre>\n<p>\u901a\u8fc7\u6dfb\u52a0 forkserver.start(set_forkserver_parallelism)\uff0c\u6211\u4eec\u5728\u8fd0\u884c\u8fdb\u7a0b\u6c60\u4e4b\u524d\u521d\u59cb\u5316\u4e86 forkserver \u6a21\u5757\u3002\u5e76\u4e14\uff0c\u6211\u4eec\u901a\u8fc7\u8c03\u7528 set_forkserver_parallelism(n) \u6765\u8bbe\u7f6e forkserver \u7684\u5e76\u884c\u5ea6\uff0c\u4ee5\u63a7\u5236\u5141\u8bb8\u521b\u5efa\u7684\u5b50\u8fdb\u7a0b\u6570\u91cf\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u5728 Python \u8fdb\u7a0b\u6c60\u4e2d\u521b\u5efa\u5b50\u8fdb\u7a0b\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5728 Python \u8fdb\u7a0b\u6c60\u4e2d\u521b&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204496","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204496","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204496"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204496\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204496"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}