{"id":65214,"date":"2023-12-09T16:16:01","date_gmt":"2023-12-09T08:16:01","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=65214"},"modified":"2023-12-09T16:16:16","modified_gmt":"2023-12-09T08:16:16","slug":"java%e4%b8%adlocksupport-parknanos%e4%b8%8esleep%e7%9a%84%e5%8c%ba%e5%88%ab%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/65214.html","title":{"rendered":"Java\u4e2dLockSupport.parkNanos\u4e0eSleep\u7684\u533a\u522b\u662f\u4ec0\u4e48"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\">\n<p>Java\u4e2dLockSupport.parkNanos\u4e0eSleep\u7684\u533a\u522b\u6709\uff1a1. \u673a\u5236\u5b9e\u73b0\uff1b2. \u5173\u8054\u9501\u7684\u4f7f\u7528\uff1b3. \u4e2d\u65ad\u54cd\u5e94\uff1b4. \u7cbe\u5ea6\u548c\u7075\u6d3b\u6027\uff1b5. \u4e0eLockSupport.unpark\u7684\u642d\u914d\u4f7f\u7528\u7b49\u3002<code>LockSupport.parkNanos<\/code> \u662f\u57fa\u4e8eJava\u4e2d\u7684\u9501\u652f\u6301\u5de5\u5177\u7c7b\uff0c\u5b83\u63d0\u4f9b\u4e86\u5bf9\u7ebf\u7a0b\u7684\u963b\u585e\u548c\u5524\u9192\u7684\u4f4e\u7ea7\u63a7\u5236\u3002<code>Thread.sleep<\/code> \u662f<code>Thread<\/code>\u7c7b\u7684\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff0c\u5c5e\u4e8e\u9ad8\u7ea7\u522b\u7684\u4f11\u7720\u5de5\u5177\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u673a\u5236\u5b9e\u73b0<\/h2>\n\n\n\n<p><code>LockSupport.parkNanos<\/code> \u548c <code>Thread.sleep<\/code> \u5728\u5b9e\u73b0\u4e0a\u6709\u663e\u8457\u7684\u533a\u522b\u3002<code>LockSupport.parkNanos<\/code> \u662f\u57fa\u4e8eJava\u4e2d\u7684\u9501\u652f\u6301\u5de5\u5177\u7c7b\uff0c\u5b83\u63d0\u4f9b\u4e86\u5bf9\u7ebf\u7a0b\u7684\u963b\u585e\u548c\u5524\u9192\u7684\u4f4e\u7ea7\u63a7\u5236\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c<code>Thread.sleep<\/code> \u662f<code>Thread<\/code>\u7c7b\u7684\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff0c\u5c5e\u4e8e\u9ad8\u7ea7\u522b\u7684\u4f11\u7720\u5de5\u5177\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u5173\u8054\u9501\u7684\u4f7f\u7528<\/h2>\n\n\n\n<p><code>LockSupport.parkNanos<\/code> \u901a\u5e38\u4e0e\u663e\u5f0f\u9501\uff08\u5982<code>ReentrantLock<\/code>\uff09\u7ed3\u5408\u4f7f\u7528\uff0c\u901a\u8fc7\u83b7\u53d6\u9501\u540e\u8fdb\u884c\u963b\u585e\u6216\u5524\u9192\u64cd\u4f5c\u3002\u8fd9\u79cd\u65b9\u5f0f\u5141\u8bb8\u66f4\u7ec6\u7c92\u5ea6\u7684\u7ebf\u7a0b\u63a7\u5236\uff0c\u4f7f\u5f97\u7ebf\u7a0b\u53ef\u4ee5\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\u88ab\u5524\u9192\u3002\u76f8\u53cd\uff0c<code>Thread.sleep<\/code> \u5e76\u4e0d\u4f9d\u8d56\u4e8e\u9501\uff0c\u5b83\u53ea\u662f\u6682\u505c\u5f53\u524d\u7ebf\u7a0b\u7684\u6267\u884c\uff0c\u4e0d\u8003\u8651\u5176\u4ed6\u7ebf\u7a0b\u7684\u72b6\u6001\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u4e2d\u65ad\u54cd\u5e94<\/h2>\n\n\n\n<p><code>Thread.sleep<\/code> \u5728\u4f11\u7720\u671f\u95f4\u5982\u679c\u7ebf\u7a0b\u88ab\u4e2d\u65ad\uff0c\u4f1a\u629b\u51fa<code>InterruptedException<\/code>\uff0c\u800c<code>LockSupport.parkNanos<\/code> \u5219\u4e0d\u53d7\u4e2d\u65ad\u7684\u76f4\u63a5\u5f71\u54cd\uff0c\u9700\u8981\u5f00\u53d1\u8005\u81ea\u884c\u68c0\u67e5\u4e2d\u65ad\u72b6\u6001\u5e76\u5904\u7406\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u7cbe\u5ea6\u548c\u7075\u6d3b\u6027<\/h2>\n\n\n\n<p><code>LockSupport.parkNanos<\/code> \u63d0\u4f9b\u4e86\u66f4\u7cbe\u786e\u7684\u7b49\u5f85\u65f6\u95f4\u63a7\u5236\uff0c\u53ef\u4ee5\u6307\u5b9a\u7eb3\u79d2\u7ea7\u522b\u7684\u7b49\u5f85\u65f6\u95f4\u3002\u8fd9\u4f7f\u5f97\u5b83\u66f4\u9002\u5408\u5bf9\u65f6\u95f4\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u666f\u3002\u76f8\u5bf9\u800c\u8a00\uff0c<code>Thread.sleep<\/code> \u7684\u6700\u5c0f\u7b49\u5f85\u65f6\u95f4\u662f\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\u7684\uff0c\u56e0\u6b64\u4e0d\u5982<code>LockSupport.parkNanos<\/code> \u7075\u6d3b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u4e0eLockSupport.unpark\u7684\u642d\u914d\u4f7f\u7528<\/h2>\n\n\n\n<p><code>LockSupport.parkNanos<\/code> \u914d\u5408 <code>LockSupport.unpark<\/code> \u4f7f\u7528\u65f6\uff0c\u53ef\u4ee5\u66f4\u7cbe\u786e\u5730\u63a7\u5236\u7ebf\u7a0b\u7684\u963b\u585e\u548c\u5524\u9192\u3002<code>Thread.sleep<\/code> \u5219\u65e0\u6cd5\u50cf <code>LockSupport<\/code> \u90a3\u6837\u76f4\u63a5\u642d\u914d\u5bf9\u5e94\u7684\u5524\u9192\u64cd\u4f5c\uff0c\u9700\u8981\u901a\u8fc7\u5176\u4ed6\u624b\u6bb5\u5b9e\u73b0\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6. \u6027\u80fd\u548c\u8d44\u6e90\u5f00\u9500<\/h2>\n\n\n\n<p>\u7531\u4e8e<code>Thread.sleep<\/code> \u662f<code>Thread<\/code>\u7c7b\u7684\u9759\u6001\u65b9\u6cd5\uff0c\u5b83\u4f1a\u5bfc\u81f4\u5f53\u524d\u7ebf\u7a0b\u6682\u65f6\u91ca\u653e CPU \u6267\u884c\u6743\uff0c\u53ef\u80fd\u6d89\u53ca\u5230\u7ebf\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362\u7b49\u5f00\u9500\u3002\u800c<code>LockSupport.parkNanos<\/code> \u66f4\u4e3a\u8f7b\u91cf\u7ea7\uff0c\u4e0d\u6d89\u53ca\u7ebf\u7a0b\u7684\u6302\u8d77\u548c\u6062\u590d\uff0c\u56e0\u6b64\u5728\u67d0\u4e9b\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u53ef\u80fd\u66f4\u5177\u6027\u80fd\u4f18\u52bf\u3002<\/p>\n\n\n\n<p><img fetchpriority=\"high\" decoding=\"async\" width=\"484\" height=\"300\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/12\/573691-Java\u4e2dLockSupportparkNanos\u4e0eSleep\u7684\u533a\u522b\u662f\u4ec0\u4e48.png?x-oss-process=image\/auto-orient,1\/format,webp\" class=\"aligncenter\" alt=\"Java\u4e2dLockSupport.parkNanos\u4e0eSleep\u7684\u533a\u522b\u662f\u4ec0\u4e48\" \/><\/p>\n\n\n\n<p><strong>\u5e38\u89c1\u95ee\u7b54\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li>\u95ee\uff1aJava\u4e2d<code>LockSupport.parkNanos<\/code>\u548c<code>Sleep<\/code>\u6709\u4f55\u533a\u522b\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a<code>LockSupport.parkNanos<\/code>\u548c<code>Thread.sleep<\/code>\u90fd\u662fJava\u4e2d\u7528\u4e8e\u7ebf\u7a0b\u4f11\u7720\u7684\u65b9\u6cd5\uff0c\u4f46\u5b83\u4eec\u5728\u5b9e\u73b0\u548c\u7528\u9014\u4e0a\u6709\u4e00\u4e9b\u533a\u522b\u3002<code>LockSupport.parkNanos<\/code>\u662f\u57fa\u4e8e\u7ebf\u7a0b\u963b\u585e\u548c\u5524\u9192\u7684\u673a\u5236\uff0c\u901a\u5e38\u4e0e<code>LockSupport.unpark<\/code>\u4e00\u8d77\u4f7f\u7528\uff0c\u7528\u4e8e\u5b9e\u73b0\u66f4\u7075\u6d3b\u7684\u7ebf\u7a0b\u7b49\u5f85\u548c\u5524\u9192\u64cd\u4f5c\u3002\u800c<code>Thread.sleep<\/code>\u662f\u4e00\u79cd\u7b80\u5355\u7684\u7ebf\u7a0b\u4f11\u7720\u65b9\u6cd5\uff0c\u901a\u5e38\u7528\u4e8e\u8ba9\u7ebf\u7a0b\u7b49\u5f85\u4e00\u6bb5\u56fa\u5b9a\u7684\u65f6\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a<code>LockSupport.parkNanos<\/code>\u548c<code>Sleep<\/code>\u5728\u6027\u80fd\u4e0a\u6709\u4f55\u5dee\u5f02\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a<code>LockSupport.parkNanos<\/code>\u901a\u5e38\u6bd4<code>Thread.sleep<\/code>\u66f4\u4e3a\u9ad8\u6548\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4f1a\u5f15\u8d77\u4e0d\u5fc5\u8981\u7684\u7cfb\u7edf\u8c03\u7528\u548c\u7ebf\u7a0b\u72b6\u6001\u7684\u5207\u6362\u3002<code>LockSupport.parkNanos<\/code>\u7684\u5b9e\u73b0\u65b9\u5f0f\u5141\u8bb8\u7ebf\u7a0b\u5728\u7b49\u5f85\u65f6\u4fdd\u6301\u5bf9CPU\u7684\u5360\u7528\uff0c\u907f\u514d\u4e86\u7ebf\u7a0b\u5207\u6362\u7684\u5f00\u9500\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c<code>Thread.sleep<\/code>\u53ef\u80fd\u5f15\u8d77\u7ebf\u7a0b\u7684\u963b\u585e\u548c\u5524\u9192\uff0c\u5bfc\u81f4\u66f4\u591a\u7684\u7cfb\u7edf\u8c03\u7528\u548c\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u56e0\u6b64\u5728\u6027\u80fd\u4e0a\u53ef\u80fd\u76f8\u5bf9\u8f83\u4f4e\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u5e94\u8be5\u4f7f\u7528<code>LockSupport.parkNanos<\/code>\u800c\u4e0d\u662f<code>Sleep<\/code>\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a<code>LockSupport.parkNanos<\/code>\u9002\u7528\u4e8e\u9700\u8981\u66f4\u7cbe\u7ec6\u63a7\u5236\u7ebf\u7a0b\u7b49\u5f85\u548c\u5524\u9192\u7684\u573a\u666f\uff0c\u5c24\u5176\u662f\u5728\u5e76\u53d1\u7f16\u7a0b\u4e2d\u3002\u5b83\u53ef\u4ee5\u4e0e\u5176\u4ed6\u540c\u6b65\u5de5\u5177\u7ed3\u5408\u4f7f\u7528\uff0c\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u7ebf\u7a0b\u534f\u4f5c\u3002\u800c<code>Thread.sleep<\/code>\u66f4\u9002\u5408\u7528\u4e8e\u7b80\u5355\u7684\u7ebf\u7a0b\u4f11\u7720\u573a\u666f\uff0c\u4f8b\u5982\u5728\u5b9a\u65f6\u4efb\u52a1\u4e2d\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u3002\u9009\u62e9\u4f7f\u7528\u54ea\u4e2a\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u6027\u80fd\u8981\u6c42\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"Java\u4e2dLockSupport.parkNanos\u4e0eSleep\u7684\u533a\u522b\u6709\uff1a1. \u673a\u5236\u5b9e\u73b0\uff1b2. \u5173\u8054\u9501\u7684\u4f7f\u7528\uff1b [&hellip;]","protected":false},"author":4,"featured_media":65217,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[3651,3652,367],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/65214"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=65214"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/65214\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/65217"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=65214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=65214"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=65214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}