{"id":10006576,"date":"2022-09-22T19:43:41","date_gmt":"2022-09-22T11:43:41","guid":{"rendered":"https:\/\/ityet.com\/?p=10006576"},"modified":"2022-09-22T19:43:41","modified_gmt":"2022-09-22T11:43:41","slug":"goroutine%e6%98%af%e5%a6%82%e4%bd%95%e8%b0%83%e5%ba%a6%e7%9a%84","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006576","title":{"rendered":"Goroutine\u662f\u5982\u4f55\u8c03\u5ea6\u7684"},"content":{"rendered":"<h2>\u4e00\u3001\u4ec0\u4e48\u662fGoroutine<\/h2>\n<p>Goroutine \u53ef\u4ee5\u770b\u4f5c\u5bf9 thread \u52a0\u7684\u4e00\u5c42\u62bd\u8c61\uff0c\u5b83\u662f\u7528\u6237\u6001\u7684\uff0c\u66f4\u8f7b\u91cf\u7ea7\u3002\u56e0\u4e3a\u6709\u4e86\u8fd9\u5c42\u62bd\u8c61\uff0cGopher \u4e0d\u4f1a\u76f4\u63a5\u9762\u5bf9 thread\u3002\u64cd\u4f5c\u7cfb\u7edf\u5374\u76f8\u53cd\uff0c\u662f\u770b\u4e0d\u5230 goroutine \u5b58\u5728\u7684\uff0c\u5b89\u5fc3\u5730\u6267\u884c\u7ebf\u7a0b\u5c31\u53ef\u4ee5\u4e86\uff0c\u7ebf\u7a0b\u624d\u662f\u5b83\u8c03\u5ea6\u7684\u57fa\u672c\u5355\u4f4d\u3002<\/p>\n<p>Goroutine \u548c thread \u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/p>\n<p>1\u3001\u5185\u5b58\u5360\u7528<br \/>\u521b\u5efa\u4e00\u4e2a goroutine \u7684\u6808\u5185\u5b58\u6d88\u8017\u4e3a 2 KB\uff0c\u5b9e\u9645\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u6808\u7a7a\u95f4\u4e0d\u591f\u7528\uff0c\u4f1a\u81ea\u52a8\u8fdb\u884c\u6269\u5bb9\u3002\u521b\u5efa\u4e00\u4e2a thread \u5219\u9700\u8981\u6d88\u8017 1 MB \u6808\u5185\u5b58\u3002<\/p>\n<p>\u5bf9\u4e8e\u4e00\u4e2a\u7528 Go \u6784\u5efa\u7684 HTTP Server \u800c\u8a00\uff0c\u5bf9\u5230\u6765\u7684\u6bcf\u4e2a\u8bf7\u6c42\uff0c\u521b\u5efa\u4e00\u4e2a goroutine \u7528\u6765\u5904\u7406\u662f\u975e\u5e38\u8f7b\u677e\u7684\u4e00\u4ef6\u4e8b\u3002\u800c\u5982\u679c\u7528\u4e00\u4e2a\u4f7f\u7528\u7ebf\u7a0b\u4f5c\u4e3a\u5e76\u53d1\u539f\u8bed\u7684\u8bed\u8a00\u6784\u5efa\u7684\u670d\u52a1\uff0c\u4f8b\u5982 Java \u6765\u8bf4\uff0c\u6bcf\u4e2a\u8bf7\u6c42\u5bf9\u5e94\u4e00\u4e2a\u7ebf\u7a0b\u5219\u592a\u6d6a\u8d39\u8d44\u6e90\u4e86\uff0c\u5f88\u5feb\u5c31\u4f1a\u51fa OOM \u9519\u8bef\uff08OutOfMermoryError\uff09\u3002<\/p>\n<p>2\u3001\u521b\u5efa\u548c\u9500\u6bc0<br \/>Thread \u521b\u5efa\u548c\u9500\u6bc0\u90fd\u4f1a\u6709\u5de8\u5927\u7684\u6d88\u8017\uff0c\u56e0\u4e3a\u8981\u548c\u64cd\u4f5c\u7cfb\u7edf\u6253\u4ea4\u9053\uff0c\u662f\u5185\u6838\u7ea7\u7684\uff0c\u901a\u5e38\u89e3\u51b3\u7684\u529e\u6cd5\u5c31\u662f\u7ebf\u7a0b\u6c60\u3002\u800c goroutine \u56e0\u4e3a\u662f\u7531 Go runtime \u8d1f\u8d23\u7ba1\u7406\u7684\uff0c\u521b\u5efa\u548c\u9500\u6bc1\u7684\u6d88\u8017\u975e\u5e38\u5c0f\uff0c\u662f\u7528\u6237\u7ea7\u3002<\/p>\n<p>3\u3001\u5207\u6362<br \/>\u5f53 threads \u5207\u6362\u65f6\uff0c\u9700\u8981\u4fdd\u5b58\u5404\u79cd\u5bc4\u5b58\u5668\uff0c\u4ee5\u4fbf\u5c06\u6765\u6062\u590d\uff1a16\u4e2a\u901a\u7528\u5bc4\u5b58\u5668\u3001PC\uff08\u7a0b\u5e8f\u8ba1\u6570\u5668\uff09\u3001SP\uff08\u5806\u6808\u6307\u9488\uff09\u3001\u6bb5\u5bc4\u5b58\u5668\u300116\u4e2aXMM\u5bc4\u5b58\u5668\u3001FP\u534f\u5904\u7406\u5668\u72b6\u6001\u300116\u4e2aAVX\u5bc4\u5b58\u5668\u3001\u6240\u6709MSR\u7b49\u3002<br \/>\u800c goroutines \u5207\u6362\u53ea\u9700\u4fdd\u5b58\u4e09\u4e2a\u5bc4\u5b58\u5668\uff1a\u7a0b\u5e8f\u8ba1\u6570\u5668\u3001\u5806\u6808\u6307\u9488\u548c BP\uff0c\u4e5f\u4e0d\u9700\u8981\u9677\u5165\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u5c42\u3002<\/p>\n<p>\u4e00\u822c\u800c\u8a00\uff0c\u7ebf\u7a0b\u5207\u6362\u4f1a\u6d88\u8017 1000-1500 \u7eb3\u79d2\uff0cGoroutine \u7684\u5207\u6362\u7ea6\u4e3a 200 ns\uff0c\u76f8\u6bd4\u4e4b\u4e0bgoroutines \u5207\u6362\u6210\u672c\u6bd4 threads \u8981\u5c0f\u5f97\u591a\u3002<\/p>\n<h2>\u4e8c\u3001Go\u8c03\u5ea6\u5668\u7684\u4f5c\u7528<\/h2>\n<p>\u63d0\u5230\u201c\u8c03\u5ea6\u201d\uff0c\u6211\u4eec\u9996\u5148\u60f3\u5230\u7684\u5c31\u662f\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u8fdb\u7a0b\u3001\u7ebf\u7a0b\u7684\u8c03\u5ea6\u3002\u64cd\u4f5c\u7cfb\u7edf\u8c03\u5ea6\u5668\u4f1a\u5c06\u7cfb\u7edf\u4e2d\u7684\u591a\u4e2a\u7ebf\u7a0b\u6309\u7167\u4e00\u5b9a\u7b97\u6cd5\u8c03\u5ea6\u5230\u7269\u7406CPU\u4e0a\u53bb\u8fd0\u884c\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2zkv\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/>\u8fd9\u79cd\u4f20\u7edf\u652f\u6301\u5e76\u53d1\u7684\u65b9\u5f0f\u6709\u8bf8\u591a\u4e0d\u8db3\uff1a<br \/>\u4e00\u4e2athread\u7684\u4ee3\u4ef7\u5df2\u7ecf\u6bd4\u8fdb\u7a0b\u5c0f\u4e86\u5f88\u591a\u4e86\uff0c\u4f46\u6211\u4eec\u4f9d\u7136\u4e0d\u80fd\u5927\u91cf\u521b\u5efathread\uff0c\u56e0\u4e3a\u9664\u4e86\u6bcf\u4e2athread\u5360\u7528\u7684\u8d44\u6e90\u4e0d\u5c0f\u4e4b\u5916\uff0c\u64cd\u4f5c\u7cfb\u7edf\u8c03\u5ea6\u5207\u6362thread\u7684\u4ee3\u4ef7\u4e5f\u4e0d\u5c0f\uff1b<\/p>\n<p>\u4e00\u4e2aGo\u7a0b\u5e8f\u5bf9\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u6765\u8bf4\u53ea\u662f\u4e00\u4e2a\u7528\u6237\u5c42\u7a0b\u5e8f\uff0c\u5b83\u7684\u773c\u4e2d\u53ea\u6709thread\uff0c\u5b83\u751a\u81f3\u4e0d\u77e5\u9053Goroutine\u7684\u5b58\u5728\u3002\u5c06\u8fd9\u4e9bgoroutines\u6309\u7167\u4e00\u5b9a\u7b97\u6cd5\u653e\u5230\u201cCPU\u201d\u4e0a\u6267\u884c\u7684\u7a0b\u5e8f\u5c31\u79f0\u4e3agoroutine\u8c03\u5ea6\u5668\u6216goroutine scheduler\u3002\u5728\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\uff0cThread\u7ade\u4e89\u7684\u201cCPU\u201d\u8d44\u6e90\u662f\u771f\u5b9e\u7684\u7269\u7406CPU\uff0c\u4f46\u5728Go\u7a0b\u5e8f\u5c42\u9762\uff0c\u5404\u4e2aGoroutine\u8981\u7ade\u4e89\u7684\u201dCPU\u201d\u8d44\u6e90\u662f\u64cd\u4f5c\u7cfb\u7edf\u7ebf\u7a0b\u3002<\/p>\n<p>\u8bf4\u5230\u8fd9\u91ccgoroutine scheduler\u7684\u4efb\u52a1\u5c31\u660e\u786e\u4e86\uff1a<br \/><strong>goroutine\u8c03\u5ea6\u5668\u901a\u8fc7\u4f7f\u7528\u4e0eCPU\u6570\u91cf\u76f8\u7b49\u7684\u7ebf\u7a0b\u51cf\u5c11\u7ebf\u7a0b\u9891\u7e41\u5207\u6362\u7684\u5185\u5b58\u5f00\u9500\uff0c\u540c\u65f6\u5728\u6bcf\u4e00\u4e2a\u7ebf\u7a0b\u4e0a\u6267\u884c\u989d\u5916\u5f00\u9500\u66f4\u4f4e\u7684 Goroutine \u6765\u964d\u4f4e\u64cd\u4f5c\u7cfb\u7edf\u548c\u786c\u4ef6\u7684\u8d1f\u8f7d\u3002<\/strong><\/p>\n<h4>Workflow<\/h4>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2BMo\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<h2>\u4e09\u3001Go\u8c03\u5ea6\u5668\u6a21\u578b\u4e0e\u6f14\u5316\u8fc7\u7a0b<\/h2>\n<h3>1\u3001G-M\u6a21\u578b<\/h3>\n<p>2012\u5e743\u670828\u65e5\uff0cGo 1.0\u6b63\u5f0f\u53d1\u5e03\u3002\u5728\u8fd9\u4e2a\u7248\u672c\u4e2d\uff0c\u6bcf\u4e2agoroutine\u5bf9\u5e94\u4e8eruntime\u4e2d\u7684\u4e00\u4e2a\u62bd\u8c61\u7ed3\u6784\uff1aG\uff0c\u800cos thread\u5219\u88ab\u62bd\u8c61\u4e3a\u4e00\u4e2a\u7ed3\u6784\uff1aM\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2zER\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/>M\u60f3\u8981\u6267\u884c\u3001\u653e\u56deG\u90fd\u5fc5\u987b\u8bbf\u95ee\u5168\u5c40G\u961f\u5217\uff0c\u5e76\u4e14M\u6709\u591a\u4e2a\uff0c\u5373\u591a\u7ebf\u7a0b\u8bbf\u95ee\u540c\u4e00\u8d44\u6e90\u9700\u8981\u52a0\u9501\u8fdb\u884c\u4fdd\u8bc1\u4e92\u65a5\/\u540c\u6b65\uff0c\u6240\u4ee5\u5168\u5c40G\u961f\u5217\u662f\u6709\u4e92\u65a5\u9501\u8fdb\u884c\u4fdd\u62a4\u7684\u3002<\/p>\n<p>\u8fd9\u4e2a\u7ed3\u6784\u867d\u7136\u7b80\u5355\uff0c\u4f46\u662f\u5374\u5b58\u5728\u7740\u8bb8\u591a\u95ee\u9898\uff1a<br \/>1\u3001\u6240\u6709goroutine\u76f8\u5173\u64cd\u4f5c\uff0c\u6bd4\u5982\uff1a\u521b\u5efa\u3001\u91cd\u65b0\u8c03\u5ea6\u7b49\u90fd\u8981\u4e0a\u9501\uff1b<br \/>2\u3001M\u8f6c\u79fbG\u4f1a\u9020\u6210\u5ef6\u8fdf\u548c\u989d\u5916\u7684\u7cfb\u7edf\u8d1f\u8f7d\u3002\u6bd4\u5982\u5f53G\u4e2d\u5305\u542b\u521b\u5efa\u65b0\u534f\u7a0b\u7684\u65f6\u5019\uff0cM\u521b\u5efa\u4e86G1\uff0c\u4e3a\u4e86\u7ee7\u7eed\u6267\u884cG\uff0c\u9700\u8981\u628aG1\u4ea4\u7ed9M1\u6267\u884c\uff0c\u4e5f\u9020\u6210\u4e86\u5f88\u5dee\u7684\u5c40\u90e8\u6027\uff0c\u56e0\u4e3aG1\u548cG\u662f\u76f8\u5173\u7684\uff0c\u6700\u597d\u653e\u5728M\u4e0a\u6267\u884c\uff0c\u800c\u4e0d\u662f\u5176\u4ed6M1\u3002<br \/>3\u3001\u7cfb\u7edf\u8c03\u7528(CPU\u5728M\u4e4b\u95f4\u7684\u5207\u6362)\u5bfc\u81f4\u9891\u7e41\u7684\u7ebf\u7a0b\u963b\u585e\u548c\u53d6\u6d88\u963b\u585e\u64cd\u4f5c\u589e\u52a0\u4e86\u7cfb\u7edf\u5f00\u9500\u3002<\/p>\n<h3>2\u3001G-P-M\u6a21\u578b<\/h3>\n<p>\u5728Go 1.1\u4e2d\u5b9e\u73b0\u4e86G-P-M\u8c03\u5ea6\u6a21\u578b\u548cwork stealing\u7b97\u6cd5\uff0c\u8fd9\u4e2a\u6a21\u578b\u4e00\u76f4\u6cbf\u7528\u81f3\u4eca\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2zF0\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/>\u5728\u65b0\u8c03\u5ea6\u5668\u4e2d\uff0c\u9664\u4e86M(thread)\u548cG(goroutine)\uff0c\u53c8\u5f15\u8fdb\u4e86P(Processor)\u3002P\u662f\u4e00\u4e2a\u201c\u903b\u8f91Proccessor\u201d\uff0c\u6bcf\u4e2aG\u8981\u60f3\u771f\u6b63\u8fd0\u884c\u8d77\u6765\uff0c\u9996\u5148\u9700\u8981\u88ab\u5206\u914d\u4e00\u4e2aP\uff08\u8fdb\u5165\u5230P\u7684\u672c\u5730\u961f\u5217\u4e2d\uff09\uff0c\u5bf9\u4e8eG\u6765\u8bf4\uff0cP\u5c31\u662f\u8fd0\u884c\u5b83\u7684\u201cCPU\u201d\uff0c\u53ef\u4ee5\u8bf4\uff1aG\u7684\u773c\u91cc\u53ea\u6709P\u3002\u4f46\u4eceGo scheduler\u89c6\u89d2\u6765\u770b\uff0c\u771f\u6b63\u7684\u201cCPU\u201d\u662fM\uff0c\u53ea\u6709\u5c06P\u548cM\u7ed1\u5b9a\u624d\u80fd\u8ba9P\u7684runq\u4e2dG\u5f97\u4ee5\u771f\u5b9e\u8fd0\u884c\u8d77\u6765\u3002<\/p>\n<h3>3\u3001\u62a2\u5360\u5f0f\u8c03\u5ea6<\/h3>\n<p>G-P-M\u6a21\u578b\u7684\u5b9e\u73b0\u7b97\u662fGo scheduler\u7684\u4e00\u5927\u8fdb\u6b65\uff0c\u4f46Scheduler\u4ecd\u7136\u6709\u4e00\u4e2a\u5934\u75bc\u7684\u95ee\u9898\uff0c\u90a3\u5c31\u662f\u4e0d\u652f\u6301\u62a2\u5360\u5f0f\u8c03\u5ea6\uff0c\u5bfc\u81f4\u4e00\u65e6\u67d0\u4e2aG\u4e2d\u51fa\u73b0\u6b7b\u5faa\u73af\u6216\u6c38\u4e45\u5faa\u73af\u7684\u4ee3\u7801\u903b\u8f91\uff0c\u90a3\u4e48G\u5c06\u6c38\u4e45\u5360\u7528\u5206\u914d\u7ed9\u5b83\u7684P\u548cM\uff0c\u4f4d\u4e8e\u540c\u4e00\u4e2aP\u4e2d\u7684\u5176\u4ed6G\u5c06\u5f97\u4e0d\u5230\u8c03\u5ea6\uff0c\u51fa\u73b0\u201c\u997f\u6b7b\u201d\u7684\u60c5\u51b5\u3002\u66f4\u4e3a\u4e25\u91cd\u7684\u662f\uff0c\u5f53\u53ea\u6709\u4e00\u4e2aP\u65f6(GOMAXPROCS=1)\u65f6\uff0c\u6574\u4e2aGo\u7a0b\u5e8f\u4e2d\u7684\u5176\u4ed6G\u90fd\u5c06\u201c\u997f\u6b7b\u201d\u3002<\/p>\n<p>\u8fd9\u4e2a\u62a2\u5360\u5f0f\u8c03\u5ea6\u7684\u539f\u7406\u5219\u662f\u5728\u6bcf\u4e2a\u51fd\u6570\u6216\u65b9\u6cd5\u7684\u5165\u53e3\uff0c\u52a0\u4e0a\u4e00\u6bb5\u989d\u5916\u7684\u4ee3\u7801\uff0c\u8ba9runtime\u6709\u673a\u4f1a\u68c0\u67e5\u662f\u5426\u9700\u8981\u6267\u884c\u62a2\u5360\u8c03\u5ea6\u3002<\/p>\n<h2>\u56db\u3001G-P-M\u6a21\u578b\u7684\u6df1\u5165\u7406\u89e3<\/h2>\n<h3>1\u3001\u57fa\u672c\u6982\u5ff5<\/h3>\n<pre><code>1\u3001\u5168\u5c40\u961f\u5217\uff1a\u5b58\u653e\u7b49\u5f85\u8fd0\u884c\u7684G\u3002\n\n2\u3001P\u7684\u672c\u5730\u961f\u5217\uff1a\u540c\u5168\u5c40\u961f\u5217\u7c7b\u4f3c\uff0c\u5b58\u653e\u7684\u4e5f\u662f\u7b49\u5f85\u8fd0\u884c\u7684G\uff0c\u5b58\u7684\u6570\u91cf\u6709\u9650\uff0c\u4e0d\u8d85\u8fc7256\u4e2a\u3002\n\u65b0\u5efaG'\u65f6\uff0cG'\u4f18\u5148\u52a0\u5165\u5230P\u7684\u672c\u5730\u961f\u5217\uff0c\u5982\u679c\u961f\u5217\u6ee1\u4e86\uff0c\u5219\u4f1a\u628a\u672c\u5730\u961f\u5217\u4e2d\u4e00\u534a\u7684G\u79fb\u52a8\u5230\u5168\u5c40\u961f\u5217\u3002\n\n3\u3001P\uff1aP\u7684\u6570\u91cf\u51b3\u5b9a\u4e86\u7cfb\u7edf\u5185\u6700\u5927\u53ef\u5e76\u884c\u7684G\u7684\u6570\u91cf\uff0cP\u7684\u6700\u5927\u4f5c\u7528\u8fd8\u662f\u5176\u62e5\u6709\u7684\u5404\u79cdG\u5bf9\u8c61\u961f\u5217\u3001\u94fe\u8868\u3001\u4e00\u4e9bcache\u548c\u72b6\u6001\u3002\n\u6240\u6709\u7684P\u90fd\u5728\u7a0b\u5e8f\u542f\u52a8\u65f6\u521b\u5efa\uff0c\u5e76\u4fdd\u5b58\u5728\u6570\u7ec4\u4e2d\uff0c\u9ed8\u8ba4\u7b49\u4e8eCUP\u6838\u6570\uff0c\u6700\u591a\u6709GOMAXPROCS(\u53ef\u914d\u7f6e)\u4e2a\u3002\n\n4\u3001M\uff1a\u7ebf\u7a0b\u60f3\u8fd0\u884c\u4efb\u52a1\u5c31\u5f97\u83b7\u53d6P\uff0c\u4eceP\u7684\u672c\u5730\u961f\u5217\u83b7\u53d6G\u3002\nP\u961f\u5217\u4e3a\u7a7a\u65f6\uff0cM\u4e5f\u4f1a\u5c1d\u8bd5\u4ece\u5168\u5c40\u961f\u5217\u62ff\u4e00\u6279G\u653e\u5230P\u7684\u672c\u5730\u961f\u5217\uff0c\u6216\u4ece\u5176\u4ed6P\u7684\u672c\u5730\u961f\u5217\u5077\u4e00\u534a\u653e\u5230\u81ea\u5df1P\u7684\u672c\u5730\u961f\u5217\u3002M\u8fd0\u884cG\uff0cG\u6267\u884c\u4e4b\u540e\uff0cM\u4f1a\u4eceP\u83b7\u53d6\u4e0b\u4e00\u4e2aG\uff0c\u4e0d\u65ad\u91cd\u590d\u4e0b\u53bb\u3002\n\nM\u7684\u521b\u5efa\u65f6\u673a\uff1a\u6309\u9700\u521b\u5efa\uff0c\u6ca1\u6709\u8db3\u591f\u7684M\u6765\u5173\u8054P\u5e76\u8fd0\u884c\u5176\u4e2d\u7684\u53ef\u8fd0\u884c\u7684G\u5c31\u4f1a\u53bb\u521b\u5efa\u65b0\u7684M\u3002\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u6709\u4e00\u5e45\u56fe\u53ef\u4ee5\u5f62\u8c61\u7684\u8bf4\u660e\u5b83\u4eec\u7684\u5173\u7cfb\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2zGp\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/>\u5730\u9f20\u7528\u5c0f\u8f66\u8fd0\u7740\u4e00\u5806\u5f85\u52a0\u5de5\u7684\u7816\u3002M\u5c31\u53ef\u4ee5\u770b\u4f5c\u56fe\u4e2d\u7684\u5730\u9f20\uff0cP\u5c31\u662f\u5c0f\u8f66\uff0cG\u5c31\u662f\u5c0f\u8f66\u91cc\u88c5\u7684\u7816\u3002<\/p>\n<p>goroutine \u7684\u521b\u5efa\u4e0e\u8c03\u5ea6\u5faa\u73af\u662f\u4e00\u4e2a\u751f\u4ea7-\u6d88\u8d39\u6d41\u7a0b\uff0c\u6574\u4e2a go \u7a0b\u5e8f\u7684\u8fd0\u884c\u5c31\u662f\u5728\u4e0d\u65ad\u5730\u6267\u884c goroutine \u7684\u751f\u4ea7\u4e0e\u6d88\u8d39\u6d41\u7a0b\u3002<\/p>\n<h3>2\u3001\u8c03\u5ea6\u5668\u7684\u8bbe\u8ba1\u7b56\u7565<\/h3>\n<h4>2.1\u3001\u590d\u7528\u7ebf\u7a0b<\/h4>\n<p>\u907f\u514d\u9891\u7e41\u7684\u521b\u5efa\u3001\u9500\u6bc1\u7ebf\u7a0b\uff0c\u800c\u662f\u5bf9\u7ebf\u7a0b\u7684\u590d\u7528\u3002<br \/>1\uff09work stealing\u673a\u5236<br \/>\u5f53\u672c\u7ebf\u7a0b\u65e0\u53ef\u8fd0\u884c\u7684G\u65f6\uff0c\u5c1d\u8bd5\u4ece\u5176\u4ed6\u7ebf\u7a0b\u7ed1\u5b9a\u7684P\u5077\u53d6G\uff0c\u800c\u4e0d\u662f\u9500\u6bc1\u7ebf\u7a0b\u3002<\/p>\n<p>2\uff09hand off\u673a\u5236<br \/>\u5f53\u672c\u7ebf\u7a0b\u56e0\u4e3aG\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u963b\u585e\u65f6\uff0c\u7ebf\u7a0b\u91ca\u653e\u7ed1\u5b9a\u7684P\uff0c\u628aP\u8f6c\u79fb\u7ed9\u5176\u4ed6\u7a7a\u95f2\u7684\u7ebf\u7a0b\u6267\u884c\u3002<\/p>\n<h4>2.2\u3001\u5229\u7528\u5e76\u884c<\/h4>\n<p>GOMAXPROCS\u8bbe\u7f6eP\u7684\u6570\u91cf\uff0c\u6700\u591a\u6709GOMAXPROCS\u4e2a\u7ebf\u7a0b\u5206\u5e03\u5728\u591a\u4e2aCPU\u4e0a\u540c\u65f6\u8fd0\u884c\u3002<\/p>\n<h3>2.3\u3001\u62a2\u5360<\/h3>\n<p>Go \u7a0b\u5e8f\u542f\u52a8\u65f6\uff0c\u8fd0\u884c\u65f6\u4f1a\u53bb\u542f\u52a8\u4e00\u4e2a\u540d\u4e3a sysmon \u7684 M\uff0c<br \/>\u4f1a\u5b9a\u65f6\u5411\u957f\u65f6\u95f4\uff08&gt;=10MS\uff09\u8fd0\u884c\u7684 G \u4efb\u52a1\u53d1\u51fa\u62a2\u5360\u8c03\u5ea6\uff0c\u9632\u6b62\u5176\u4ed6goroutine\u88ab\u997f\u6b7b\u3002<\/p>\n<h3>3\u3001go func()\u7684\u6267\u884c\u6d41\u7a0b<\/h3>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2zNk\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>1\u3001\u6211\u4eec\u901a\u8fc7 go func()\u6765\u521b\u5efa\u4e00\u4e2agoroutine\uff1b<\/p>\n<p>2\u3001\u6709\u4e24\u4e2a\u5b58\u50a8G\u7684\u961f\u5217\uff0c\u4e00\u4e2a\u662f\u5c40\u90e8\u8c03\u5ea6\u5668P\u7684\u672c\u5730\u961f\u5217\u3001\u4e00\u4e2a\u662f\u5168\u5c40G\u961f\u5217\u3002\u65b0\u521b\u5efa\u7684G\u4f1a\u5148\u4fdd\u5b58\u5728P\u7684\u672c\u5730\u961f\u5217\u4e2d\uff0c\u5982\u679cP\u7684\u672c\u5730\u961f\u5217\u5df2\u7ecf\u6ee1\u4e86\u5c31\u4f1a\u4fdd\u5b58\u5728\u5168\u5c40\u7684\u961f\u5217\u4e2d\uff1b<\/p>\n<p>3\u3001G\u53ea\u80fd\u8fd0\u884c\u5728M\u4e2d\uff0c\u4e00\u4e2aM\u5fc5\u987b\u6301\u6709\u4e00\u4e2aP\uff0cM\u4e0eP\u662f1:1\u7684\u5173\u7cfb\u3002M\u4f1a\u4eceP\u7684\u672c\u5730\u961f\u5217\u5f39\u51fa\u4e00\u4e2a\u53ef\u6267\u884c\u72b6\u6001\u7684G\u6765\u6267\u884c\uff0c\u5982\u679cP\u7684\u672c\u5730\u961f\u5217\u4e3a\u7a7a\uff0c\u5c31\u4f1a\u53bb\u770b\u5168\u5c40\u961f\u5217\uff0c\u5168\u5c40\u4e5f\u6ca1\u6709\u5c31\u4f1a\u4ece\u5176\u4ed6\u7684MP\u7ec4\u5408\u5077\u53d6\u4e00\u4e2a\u53ef\u6267\u884c\u7684G\u6765\u6267\u884c\uff1b<\/p>\n<p>4\u3001\u4e00\u4e2aM\u8c03\u5ea6G\u6267\u884c\u7684\u8fc7\u7a0b\u662f\u4e00\u4e2a\u5faa\u73af\u673a\u5236\uff1b<\/p>\n<p>5\u3001\u5f53M\u6267\u884c\u67d0\u4e00\u4e2aG\u65f6\u5019\u5982\u679c\u53d1\u751f\u4e86syscall\u6216\u8005\u5176\u4f59\u963b\u585e\u64cd\u4f5c\uff0cM\u4f1a\u963b\u585e\uff0c\u5982\u679c\u5f53\u524d\u6709\u4e00\u4e9bG\u5728\u6267\u884c\uff0cruntime\u4f1a\u628a\u8fd9\u4e2a\u7ebf\u7a0bM\u4eceP\u4e2d\u6458\u9664(detach)\uff0c\u7136\u540e\u518d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u64cd\u4f5c\u7cfb\u7edf\u7684\u7ebf\u7a0b(\u5982\u679c\u6709\u7a7a\u95f2\u7684\u7ebf\u7a0b\u53ef\u7528\u5c31\u590d\u7528\u7a7a\u95f2\u7ebf\u7a0b)\u6765\u670d\u52a1\u4e8e\u8fd9\u4e2aP\uff1b<\/p>\n<p>6\u3001\u5f53M\u7cfb\u7edf\u8c03\u7528\u7ed3\u675f\u65f6\u5019\uff0c\u8fd9\u4e2aG\u4f1a\u5c1d\u8bd5\u83b7\u53d6\u4e00\u4e2a\u7a7a\u95f2\u7684P\u6267\u884c\uff0c\u5e76\u653e\u5165\u5230\u8fd9\u4e2aP\u7684\u672c\u5730\u961f\u5217\u3002\u5982\u679c\u83b7\u53d6\u4e0d\u5230P\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7ebf\u7a0bM\u53d8\u6210\u4f11\u7720\u72b6\u6001\uff0c\u52a0\u5165\u5230\u7a7a\u95f2\u7ebf\u7a0b\u4e2d\uff0c\u7136\u540e\u8fd9\u4e2aG\u4f1a\u88ab\u653e\u5165\u5168\u5c40\u961f\u5217\u4e2d\u3002<\/p>\n<h3>4\u3001\u8c03\u5ea6\u5668\u7684\u751f\u547d\u5468\u671f<\/h3>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc2ArV\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/>\u7279\u6b8a\u7684M0\u548cG0<br \/><strong>M0<\/strong><br \/>M0\u662f\u542f\u52a8\u7a0b\u5e8f\u540e\u7684\u7f16\u53f7\u4e3a0\u7684\u4e3b\u7ebf\u7a0b\uff0c\u5b83\u5728\u6574\u4e2a\u8fd0\u884c\u671f\u4e13\u95e8\u8d1f\u8d23\u505a\u7279\u5b9a\u7684\u4e8b\u60c5\u2014\u2014\u7cfb\u7edf\u76d1\u63a7(sysmon)\u3002<\/p>\n<p><strong>G0<\/strong><br \/>G0\u662f\u6bcf\u6b21\u542f\u52a8\u4e00\u4e2aM\u90fd\u4f1a\u7b2c\u4e00\u4e2a\u521b\u5efa\u7684gourtine\uff0cG0\u4ec5\u7528\u4e8e\u8d1f\u8d23\u8c03\u5ea6\u7684G\uff0cG0\u4e0d\u6307\u5411\u4efb\u4f55\u53ef\u6267\u884c\u7684\u51fd\u6570, \u6bcf\u4e2aM\u90fd\u4f1a\u6709\u4e00\u4e2a\u81ea\u5df1\u7684G0\u3002\u5728\u8c03\u5ea6\u6216\u7cfb\u7edf\u8c03\u7528\u65f6\u4f1a\u4f7f\u7528G0\u7684\u6808\u7a7a\u95f4, 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goroutine\u52a0\u5165\u5230P\u7684\u672c\u5730\u961f\u5217\u3002<\/li>\n<li>\u542f\u52a8m0\uff0cm0\u5df2\u7ecf\u7ed1\u5b9a\u4e86P\uff0c\u4f1a\u4eceP\u7684\u672c\u5730\u961f\u5217\u83b7\u53d6G\uff0c\u83b7\u53d6\u5230main goroutine\u3002<\/li>\n<li>G\u62e5\u6709\u6808\uff0cM\u6839\u636eG\u4e2d\u7684\u6808\u4fe1\u606f\u548c\u8c03\u5ea6\u4fe1\u606f\u8bbe\u7f6e\u8fd0\u884c\u73af\u5883<\/li>\n<li>M\u8fd0\u884cG<\/li>\n<li>G\u9000\u51fa\uff0c\u518d\u6b21\u56de\u5230M\u83b7\u53d6\u53ef\u8fd0\u884c\u7684G\uff0c\u8fd9\u6837\u91cd\u590d\u4e0b\u53bb\uff0c\u76f4\u5230main.main\u9000\u51fa\uff0cruntime.main\u6267\u884cDefer\u548cPanic\u5904\u7406\uff0c\u6216\u8c03\u7528runtime.exit\u9000\u51fa\u7a0b\u5e8f\u3002<\/li>\n<\/ol>\n<p>\u8c03\u5ea6\u5668\u7684\u751f\u547d\u5468\u671f\u51e0\u4e4e\u5360\u6ee1\u4e86\u4e00\u4e2aGo\u7a0b\u5e8f\u7684\u4e00\u751f\uff0cruntime.main\u7684goroutine\u6267\u884c\u4e4b\u524d\u90fd\u662f\u4e3a\u8c03\u5ea6\u5668\u505a\u51c6\u5907\u5de5\u4f5c\uff0cruntime.main\u7684goroutine\u8fd0\u884c\uff0c\u624d\u662f\u8c03\u5ea6\u5668\u7684\u771f\u6b63\u5f00\u59cb\uff0c\u76f4\u5230runtime.main\u7ed3\u675f\u800c\u7ed3\u675f\u3002<\/p>\n<p>\u53c2\u8003\u8d44\u6599\uff1a<br \/><a href=\"https:\/\/link.segmentfault.com\/?enc=w7sq6N50%2B3AHgKq0%2FeSybA%3D%3D.tGJsIb8sUvtWizJ%2FKk%2FvYzso38MqnLp%2B7K9cQg%2FumjhP2G2ojMGharVHKRTVKJgrrk7Nb2tWWC8c0Qv1wjeOWCNfljlRCTuotBShMvByWnY%3D\" rel=\"nofollow\">\u4e5f\u8c08goroutine\u8c03\u5ea6\u5668<\/a><br \/><a href=\"https:\/\/link.segmentfault.com\/?enc=mWmrPwxu%2Fn78jCo%2FIxHS9g%3D%3D.6r3kcRSN7U3ngWSfx%2Bws3YTPwVzr8duQyb0ef%2FafF69AUgWFVADNNavCFe1ipRZv\" rel=\"nofollow\">Golang\u7684\u534f\u7a0b\u8c03\u5ea6\u5668\u539f\u7406\u53caGMP\u8bbe\u8ba1\u601d\u60f3<\/a><br \/><a href=\"https:\/\/link.segmentfault.com\/?enc=C3MyYvXLw7n4CXifAuy0Tg%3D%3D.BSSBBUBOlgAdA8Jz80mAUBfgxo2geCVnvUir8acDzLp%2F7QT5hmgnfwOfp%2FJPLqenKpl6f%2Frf0nbn4RyfU4UgtQ%3D%3D\" rel=\"nofollow\">Goroutine\u8c03\u5ea6\u5668<\/a><br \/><a href=\"https:\/\/link.segmentfault.com\/?enc=G%2F4zeAg1hfar4DJz%2BpxjtA%3D%3D.7hnNHFqydRygoYQq2HyttvUKLgiZqE44XwdY6LRkHg7kavotYHSSw8tgcNsCg5QL2ibPOFyu%2F2zVYuknl56SyQ%3D%3D\" rel=\"nofollow\">\u6df1\u5ea6\u89e3\u5bc6Go\u8bed\u8a00\u4e4b scheduler <\/a><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042523723\">https:\/\/segmentfault.com\/a\/1190000042523723<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u4ec0\u4e48\u662fGoroutine Goroutine \u53ef\u4ee5\u770b\u4f5c\u5bf9 thread \u52a0\u7684\u4e00\u5c42\u62bd\u8c61\uff0c\u5b83\u662f\u7528\u6237\u6001\u7684\uff0c\u66f4\u8f7b\u91cf 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