{"id":10008298,"date":"2023-09-20T20:37:45","date_gmt":"2023-09-20T12:37:45","guid":{"rendered":"https:\/\/blog.itmax.cn\/?p=10008298"},"modified":"2023-09-20T20:37:45","modified_gmt":"2023-09-20T12:37:45","slug":"%e5%88%ab%e5%86%8d%e7%ba%a0%e7%bb%93%e7%ba%bf%e7%a8%8b%e6%b1%a0%e6%b1%a0%e5%a4%a7%e5%b0%8f%e3%80%81%e7%ba%bf%e7%a8%8b%e6%95%b0%e9%87%8f%e4%ba%86%ef%bc%8c%e5%93%aa%e6%9c%89%e4%bb%80%e4%b9%88%e5%9b%ba","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008298","title":{"rendered":"\u522b\u518d\u7ea0\u7ed3\u7ebf\u7a0b\u6c60\u6c60\u5927\u5c0f\u3001\u7ebf\u7a0b\u6570\u91cf\u4e86\uff0c\u54ea\u6709\u4ec0\u4e48\u56fa\u5b9a\u516c\u5f0f | \u4eac\u4e1c\u4e91\u6280\u672f\u56e2\u961f"},"content":{"rendered":"<p>\u53ef\u80fd\u5f88\u591a\u4eba\u90fd\u770b\u5230\u8fc7\u4e00\u4e2a\u7ebf\u7a0b\u6570\u8bbe\u7f6e\u7684\u7406\u8bba\uff1a<\/p>\n<ul>\n<li>CPU \u5bc6\u96c6\u578b\u7684\u7a0b\u5e8f &#8211; \u6838\u5fc3\u6570 + 1<\/li>\n<li>I\/O \u5bc6\u96c6\u578b\u7684\u7a0b\u5e8f &#8211; \u6838\u5fc3\u6570 * 2<\/li>\n<\/ul>\n<p>\u4e0d\u4f1a\u5427\uff0c\u4e0d\u4f1a\u5427\uff0c\u771f\u7684\u6709\u4eba\u6309\u7167\u8fd9\u4e2a\u7406\u8bba\u89c4\u5212\u7ebf\u7a0b\u6570\uff1f<\/p>\n<h2>\u7ebf\u7a0b\u6570\u548cCPU\u5229\u7528\u7387\u7684\u5c0f\u6d4b\u8bd5<\/h2>\n<p>\u629b\u5f00\u4e00\u4e9b\u64cd\u4f5c\u7cfb\u7edf\uff0c\u8ba1\u7b97\u673a\u539f\u7406\u4e0d\u8c08\uff0c\u8bf4\u4e00\u4e2a\u57fa\u672c\u7684\u7406\u8bba\uff08\u4e0d\u7528\u7ea0\u7ed3\u662f\u5426\u4e25\u8c28\uff0c\u53ea\u4e3a\u597d\u7406\u89e3\uff09\uff1a<strong>\u4e00\u4e2aCPU\u6838\u5fc3\uff0c\u5355\u4f4d\u65f6\u95f4\u5185\u53ea\u80fd\u6267\u884c\u4e00\u4e2a\u7ebf\u7a0b\u7684\u6307\u4ee4<\/strong><\/p>\n<p>\u90a3\u4e48\u7406\u8bba\u4e0a\uff0c\u6211\u4e00\u4e2a\u7ebf\u7a0b\u53ea\u9700\u8981\u4e0d\u505c\u7684\u6267\u884c\u6307\u4ee4\uff0c\u5c31\u53ef\u4ee5\u8dd1\u6ee1\u4e00\u4e2a\u6838\u5fc3\u7684\u5229\u7528\u7387\u3002<\/p>\n<p>\u6765\u5199\u4e2a\u6b7b\u5faa\u73af\u7a7a\u8dd1\u7684\u4f8b\u5b50\u9a8c\u8bc1\u4e00\u4e0b\uff1a<\/p>\n<p><strong>\u6d4b\u8bd5\u73af\u5883\uff1aAMD Ryzen 5 3600, 6 &#8211; Core, 12 &#8211; Threads<\/strong><\/p>\n<pre><code>public class CPUUtilizationTest {\n    public static void main(String[] args) {\n        \/\/\u6b7b\u5faa\u73af\uff0c\u4ec0\u4e48\u90fd\u4e0d\u505a\n        while (true){\n        }\n    }\n}\n\n<\/code><\/pre>\n<p>\u8fd0\u884c\u8fd9\u4e2a\u4f8b\u5b50\u540e\uff0c\u6765\u770b\u770b\u73b0\u5728CPU\u7684\u5229\u7528\u7387\uff1a  <br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235412\" alt=\"image.png\" title=\"image.png\">  <br \/>\u4ece\u56fe\u4e0a\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u76843\u53f7\u6838\u5fc3\u5229\u7528\u7387\u5df2\u7ecf\u88ab\u8dd1\u6ee1\u4e86<\/p>\n<p>\u90a3\u57fa\u4e8e\u4e0a\u9762\u7684\u7406\u8bba\uff0c\u6211\u591a\u5f00\u51e0\u4e2a\u7ebf\u7a0b\u8bd5\u8bd5\u5462\uff1f<\/p>\n<pre><code>public class CPUUtilizationTest {\n    public static void main(String[] args) {\n\n        for (int j = 0; j &lt; 6; j++) {\n            new Thread(new Runnable() {\n                @Override\n                public void run() {\n                    while (true){\n                    }\n                }\n            }).start();\n        }\n    }\n}\n\n<\/code><\/pre>\n<p>\u6b64\u65f6\u518d\u770bCPU\u5229\u7528\u7387\uff0c1\/2\/5\/7\/9\/11 \u51e0\u4e2a\u6838\u5fc3\u7684\u5229\u7528\u7387\u5df2\u7ecf\u88ab\u8dd1\u6ee1\uff1a  <br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235413\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u90a3\u5982\u679c\u5f0012\u4e2a\u7ebf\u7a0b\u5462\uff0c\u662f\u4e0d\u662f\u4f1a\u628a\u6240\u6709\u6838\u5fc3\u7684\u5229\u7528\u7387\u90fd\u8dd1\u6ee1\uff1f\u7b54\u6848\u4e00\u5b9a\u662f\u4f1a\u7684  <br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235414\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5982\u679c\u6b64\u65f6\u6211\u628a\u4e0a\u9762\u4f8b\u5b50\u7684\u7ebf\u7a0b\u6570\u7ee7\u7eed\u589e\u52a0\u523024\u4e2a\u7ebf\u7a0b\uff0c\u4f1a\u51fa\u73b0\u4ec0\u4e48\u7ed3\u679c\u5462\uff1f  <br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235416\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u5230\uff0cCPU\u5229\u7528\u7387\u548c\u4e0a\u4e00\u6b65\u4e00\u6837\uff0c\u8fd8\u662f\u6240\u6709\u6838\u5fc3100%\uff0c\u4e0d\u8fc7\u6b64\u65f6\u8d1f\u8f7d\u5df2\u7ecf\u4ece11.x\u589e\u52a0\u5230\u4e8622.x\uff08load average\u89e3\u91ca\u53c2\u8003<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=lR5NT5jPXkhrilv9U20fyA%3D%3D.CEcMY1tpCAnj8XA7od%2BkEJw4UmoPn0TwrkE%2ByrQRQErQ%2BvRRPJ1mJMGWfsJaXZ20iFakDum2Uq5mi373WNhXdg%3D%3D\" rel=\"noopener noreferrer\">https:\/\/scoutapm.com\/blog\/understanding-load-averages<\/a>\uff09\uff0c\u8bf4\u660e\u6b64\u65f6CPU\u66f4\u7e41\u5fd9\uff0c\u7ebf\u7a0b\u7684\u4efb\u52a1\u65e0\u6cd5\u53ca\u65f6\u6267\u884c\u3002<\/p>\n<p>\u73b0\u4ee3CPU\u57fa\u672c\u90fd\u662f\u591a\u6838\u5fc3\u7684\uff0c\u6bd4\u5982\u6211\u8fd9\u91cc\u6d4b\u8bd5\u7528\u7684AMD 3600\uff0c6\u6838\u5fc312\u7ebf\u7a0b\uff08\u8d85\u7ebf\u7a0b\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u7b80\u5355\u7684\u8ba4\u4e3a\u5b83\u5c31\u662f12\u6838\u5fc3CPU\u3002\u90a3\u4e48\u6211\u8fd9\u4e2aCPU\u5c31\u53ef\u4ee5\u540c\u65f6\u505a12\u4ef6\u4e8b\uff0c\u4e92\u4e0d\u6253\u6270\u3002<\/p>\n<p>\u5982\u679c\u8981\u6267\u884c\u7684\u7ebf\u7a0b\u5927\u4e8e\u6838\u5fc3\u6570\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u901a\u8fc7\u64cd\u4f5c\u7cfb\u7edf\u7684\u8c03\u5ea6\u4e86\u3002\u64cd\u4f5c\u7cfb\u7edf\u7ed9\u6bcf\u4e2a\u7ebf\u7a0b\u5206\u914dCPU\u65f6\u95f4\u7247\u8d44\u6e90\uff0c\u7136\u540e\u4e0d\u505c\u7684\u5207\u6362\uff0c\u4ece\u800c\u5b9e\u73b0\u201c\u5e76\u884c\u201d\u6267\u884c\u7684\u6548\u679c\u3002<\/p>\n<p>\u4f46\u662f\u8fd9\u6837\u771f\u7684\u66f4\u5feb\u5417\uff1f\u4ece\u4e0a\u9762\u7684\u4f8b\u5b50\u53ef\u4ee5\u770b\u51fa\uff0c<strong>\u4e00\u4e2a\u7ebf\u7a0b<\/strong>\u5c31\u53ef\u4ee5\u628a<strong>\u4e00\u4e2a\u6838\u5fc3<\/strong>\u7684\u5229\u7528\u7387\u8dd1\u6ee1\u3002\u5982\u679c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u5f88\u201c\u9738\u9053\u201d\uff0c\u4e0d\u505c\u7684\u6267\u884c\u6307\u4ee4\uff0c\u4e0d\u7ed9CPU\u7a7a\u95f2\u7684\u65f6\u95f4\uff0c\u5e76\u4e14\u540c\u65f6\u6267\u884c\u7684\u7ebf\u7a0b\u6570\u5927\u4e8eCPU\u7684\u6838\u5fc3\u6570\uff0c\u5c31\u4f1a\u5bfc\u81f4\u64cd\u4f5c\u7cfb\u7edf<strong>\u66f4\u9891\u7e41\u7684\u6267\u884c\u5207\u6362\u7ebf\u7a0b\u6267\u884c<\/strong>\uff0c\u4ee5\u786e\u4fdd\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u5f97\u5230\u6267\u884c\u3002<\/p>\n<p>\u4e0d\u8fc7\u5207\u6362\u662f\u6709\u4ee3\u4ef7\u7684\uff0c<strong>\u6bcf\u6b21\u5207\u6362\u4f1a\u4f34\u968f\u7740\u5bc4\u5b58\u5668\u6570\u636e\u66f4\u65b0\uff0c\u5185\u5b58\u9875\u8868\u66f4\u65b0\u7b49\u64cd\u4f5c<\/strong>\u3002\u867d\u7136\u4e00\u6b21\u5207\u6362\u7684\u4ee3\u4ef7\u548cI\/O\u64cd\u4f5c\u6bd4\u8d77\u6765\u5fae\u4e0d\u8db3\u9053\uff0c\u4f46\u5982\u679c\u7ebf\u7a0b\u8fc7\u591a\uff0c\u7ebf\u7a0b\u5207\u6362\u7684\u8fc7\u4e8e\u9891\u7e41\uff0c\u751a\u81f3\u5728\u5355\u4f4d\u65f6\u95f4\u5185\u5207\u6362\u7684\u8017\u65f6\u5df2\u7ecf\u5927\u4e8e\u7a0b\u5e8f\u6267\u884c\u7684\u65f6\u95f4\uff0c\u5c31\u4f1a\u5bfc\u81f4CPU\u8d44\u6e90\u8fc7\u591a\u7684\u6d6a\u8d39\u5728\u4e0a\u4e0b\u6587\u5207\u6362\u4e0a\uff0c\u800c\u4e0d\u662f\u5728\u6267\u884c\u7a0b\u5e8f\uff0c\u5f97\u4e0d\u507f\u5931\u3002<\/p>\n<p>\u4e0a\u9762\u6b7b\u5faa\u73af\u7a7a\u8dd1\u7684\u4f8b\u5b50\uff0c\u6709\u70b9\u8fc7\u4e8e\u6781\u7aef\u4e86\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u4e0d\u592a\u53ef\u80fd\u6709\u8fd9\u79cd\u7a0b\u5e8f\u3002<\/p>\n<p>\u5927\u591a\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\u90fd\u4f1a\u6709\u4e00\u4e9b I\/O\u64cd\u4f5c\uff0c\u53ef\u80fd\u662f\u8bfb\u5199\u6587\u4ef6\uff0c\u7f51\u7edc\u6536\u53d1\u62a5\u6587\u7b49\uff0c\u8fd9\u4e9b I\/O \u64cd\u4f5c\u5728\u8fdb\u884c\u65f6\u65f6\u9700\u8981\u7b49\u5f85\u53cd\u9988\u7684\u3002\u6bd4\u5982\u7f51\u7edc\u8bfb\u5199\u65f6\uff0c\u9700\u8981\u7b49\u5f85\u62a5\u6587\u53d1\u9001\u6216\u8005\u63a5\u6536\u5230\uff0c\u5728\u8fd9\u4e2a\u7b49\u5f85\u8fc7\u7a0b\u4e2d\uff0c\u7ebf\u7a0b\u662f\u7b49\u5f85\u72b6\u6001\uff0cCPU\u6ca1\u6709\u5de5\u4f5c\u3002\u6b64\u65f6\u64cd\u4f5c\u7cfb\u7edf\u5c31\u4f1a\u8c03\u5ea6CPU\u53bb\u6267\u884c\u5176\u4ed6\u7ebf\u7a0b\u7684\u6307\u4ee4\uff0c\u8fd9\u6837\u5c31\u5b8c\u7f8e\u5229\u7528\u4e86CPU\u8fd9\u6bb5\u7a7a\u95f2\u671f\uff0c\u63d0\u9ad8\u4e86CPU\u7684\u5229\u7528\u7387\u3002<\/p>\n<p>\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u7a0b\u5e8f\u4e0d\u505c\u7684\u5faa\u73af\u4ec0\u4e48\u90fd\u4e0d\u505a\uff0cCPU\u8981\u4e0d\u505c\u7684\u6267\u884c\u6307\u4ee4\uff0c\u51e0\u4e4e\u6ca1\u6709\u5565\u7a7a\u95f2\u7684\u65f6\u95f4\u3002\u5982\u679c\u63d2\u5165\u4e00\u6bb5I\/O\u64cd\u4f5c\u5462\uff0cI\/O \u64cd\u4f5c\u671f\u95f4 CPU\u662f\u7a7a\u95f2\u72b6\u6001\uff0cCPU\u7684\u5229\u7528\u7387\u4f1a\u600e\u4e48\u6837\u5462\uff1f\u5148\u770b\u770b\u5355\u7ebf\u7a0b\u4e0b\u7684\u7ed3\u679c\uff1a<\/p>\n<pre><code>public class CPUUtilizationTest {\n    public static void main(String[] args) throws InterruptedException {\n\n        for (int n = 0; n &lt; 1; n++) {\n            new Thread(new Runnable() {\n                @Override\n                public void run() {\n                    while (true){\n                        \/\/\u6bcf\u6b21\u7a7a\u5faa\u73af 1\u4ebf \u6b21\u540e\uff0csleep 50ms\uff0c\u6a21\u62df I\/O\u7b49\u5f85\u3001\u5207\u6362\n                        for (int i = 0; i &lt; 100_000_000l; i++) { \n                        }\n                        try {\n                            Thread.sleep(50);\n                        }\n                        catch (InterruptedException e) {\n                            e.printStackTrace();\n                        }\n                    }\n                }\n            }).start();\n        }\n    }\n}\n\n<\/code><\/pre>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235417\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u54c7\uff0c\u552f\u4e00\u6709\u5229\u7528\u7387\u76849\u53f7\u6838\u5fc3\uff0c\u5229\u7528\u7387\u4e5f\u624d50%\uff0c\u548c\u524d\u9762\u6ca1\u6709sleep\u7684100%\u76f8\u6bd4\uff0c\u5df2\u7ecf\u4f4e\u4e86\u4e00\u534a\u4e86\u3002\u73b0\u5728\u628a\u7ebf\u7a0b\u6570\u8c03\u6574\u523012\u4e2a\u770b\u770b\uff1a  <br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235418\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5355\u4e2a\u6838\u5fc3\u7684\u5229\u7528\u738760\u5de6\u53f3\uff0c\u548c\u521a\u624d\u7684\u5355\u7ebf\u7a0b\u7ed3\u679c\u5dee\u8ddd\u4e0d\u5927\uff0c\u8fd8\u6ca1\u6709\u628aCPU\u5229\u7528\u7387\u8dd1\u6ee1\uff0c\u73b0\u5728\u5c06\u7ebf\u7a0b\u6570\u589e\u52a0\u523018\uff1a  <br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235419\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u6b64\u65f6\u5355\u6838\u5fc3\u5229\u7528\u7387\uff0c\u5df2\u7ecf\u63a5\u8fd1100%\u4e86\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u5f53\u7ebf\u7a0b\u4e2d\u6709 I\/O \u7b49\u64cd\u4f5c\u4e0d\u5360\u7528CPU\u8d44\u6e90\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u53ef\u4ee5\u8c03\u5ea6CPU\u53ef\u4ee5\u540c\u65f6\u6267\u884c\u66f4\u591a\u7684\u7ebf\u7a0b\u3002<\/p>\n<p>\u73b0\u5728\u5c06I\/O\u4e8b\u4ef6\u7684\u9891\u7387\u8c03\u9ad8\u770b\u770b\u5462\uff0c\u628a\u5faa\u73af\u6b21\u6570\u51cf\u5230\u4e00\u534a\uff0c50\/_000\/_000\uff0c\u540c\u6837\u662f18\u4e2a\u7ebf\u7a0b\uff1a<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235420\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u6b64\u65f6\u6bcf\u4e2a\u6838\u5fc3\u7684\u5229\u7528\u7387\uff0c\u5927\u6982\u53ea\u670970%\u5de6\u53f3\u4e86\u3002<\/p>\n<h2>\u7ebf\u7a0b\u6570\u548cCPU\u5229\u7528\u7387\u7684\u5c0f\u603b\u7ed3<\/h2>\n<p>\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u53ea\u662f\u8f85\u52a9\uff0c\u4e3a\u4e86\u66f4\u597d\u7684\u7406\u89e3\u7ebf\u7a0b\u6570\/\u7a0b\u5e8f\u884c\u4e3a\/CPU\u72b6\u6001\u7684\u5173\u7cfb\uff0c\u6765\u7b80\u5355\u603b\u7ed3\u4e00\u4e0b\uff1a<\/p>\n<ol>\n<li>\u4e00\u4e2a\u6781\u7aef\u7684\u7ebf\u7a0b\uff08\u4e0d\u505c\u6267\u884c\u201c\u8ba1\u7b97\u201d\u578b\u64cd\u4f5c\u65f6\uff09\uff0c\u5c31\u53ef\u4ee5\u628a\u5355\u4e2a\u6838\u5fc3\u7684\u5229\u7528\u7387\u8dd1\u6ee1\uff0c\u591a\u6838\u5fc3CPU\u6700\u591a\u53ea\u80fd\u540c\u65f6\u6267\u884c\u7b49\u4e8e\u6838\u5fc3\u6570\u7684\u201c\u6781\u7aef\u201d\u7ebf\u7a0b\u6570<\/li>\n<li>\u5982\u679c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u8fd9\u4e48\u201c\u6781\u7aef\u201d\uff0c\u4e14\u540c\u65f6\u6267\u884c\u7684\u7ebf\u7a0b\u6570\u8d85\u8fc7\u6838\u5fc3\u6570\uff0c\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u5207\u6362\uff0c\u9020\u6210\u8d1f\u8f7d\u8fc7\u9ad8\uff0c\u53ea\u4f1a\u8ba9\u6267\u884c\u66f4\u6162<\/li>\n<li>I\/O \u7b49\u6682\u505c\u7c7b\u64cd\u4f5c\u65f6\uff0cCPU\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\uff0c\u64cd\u4f5c\u7cfb\u7edf\u8c03\u5ea6CPU\u6267\u884c\u5176\u4ed6\u7ebf\u7a0b\uff0c\u53ef\u4ee5\u63d0\u9ad8CPU\u5229\u7528\u7387\uff0c\u540c\u65f6\u6267\u884c\u66f4\u591a\u7684\u7ebf\u7a0b<\/li>\n<li>I\/O \u4e8b\u4ef6\u7684\u9891\u7387\u9891\u7387\u8d8a\u9ad8\uff0c\u6216\u8005\u7b49\u5f85\/\u6682\u505c\u65f6\u95f4\u8d8a\u957f\uff0cCPU\u7684\u7a7a\u95f2\u65f6\u95f4\u4e5f\u5c31\u66f4\u957f\uff0c\u5229\u7528\u7387\u8d8a\u4f4e\uff0c\u64cd\u4f5c\u7cfb\u7edf\u53ef\u4ee5\u8c03\u5ea6CPU\u6267\u884c\u66f4\u591a\u7684\u7ebf\u7a0b<\/li>\n<\/ol>\n<h2>\u7ebf\u7a0b\u6570\u89c4\u5212\u7684\u516c\u5f0f<\/h2>\n<p>\u524d\u9762\u7684\u94fa\u57ab\uff0c\u90fd\u662f\u4e3a\u4e86\u5e2e\u52a9\u7406\u89e3\uff0c\u73b0\u5728\u6765\u770b\u770b\u4e66\u672c\u4e0a\u7684\u5b9a\u4e49\u3002\u300aJava \u5e76\u53d1\u7f16\u7a0b\u5b9e\u6218\u300b\u4ecb\u7ecd\u4e86\u4e00\u4e2a\u7ebf\u7a0b\u6570\u8ba1\u7b97\u7684\u516c\u5f0f\uff1a<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235421\" alt=\"CleanShot 2023-09-07 at 12.41.41@2x.png\" title=\"CleanShot 2023-09-07 at 12.41.41@2x.png\" loading=\"lazy\"><\/p>\n<p>\u5982\u679c\u5e0c\u671b\u7a0b\u5e8f\u8dd1\u5230CPU\u7684\u76ee\u6807\u5229\u7528\u7387\uff0c\u9700\u8981\u7684\u7ebf\u7a0b\u6570\u516c\u5f0f\u4e3a\uff1a<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235422\" alt=\"CleanShot 2023-09-07 at 12.42.02@2x.png\" title=\"CleanShot 2023-09-07 at 12.42.02@2x.png\" loading=\"lazy\"><\/p>\n<p>\u516c\u5f0f\u5f88\u6e05\u6670\uff0c\u73b0\u5728\u6765\u5e26\u5165\u4e0a\u9762\u7684\u4f8b\u5b50\u8bd5\u8bd5\u770b\uff1a<\/p>\n<p>\u5982\u679c\u6211\u671f\u671b\u76ee\u6807\u5229\u7528\u7387\u4e3a90%\uff08\u591a\u683890\uff09\uff0c\u90a3\u4e48\u9700\u8981\u7684\u7ebf\u7a0b\u6570\u4e3a\uff1a<\/p>\n<p>\u6838\u5fc3\u657012 <em> \u5229\u7528\u73870.9 <\/em> (1 + 50(sleep\u65f6\u95f4)\/50(\u5faa\u73af50\/_000\/_000\u8017\u65f6)) \u2248 22<\/p>\n<p>\u73b0\u5728\u628a\u7ebf\u7a0b\u6570\u8c03\u523022\uff0c\u770b\u770b\u7ed3\u679c\uff1a  <br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235423\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u73b0\u5728CPU\u5229\u7528\u7387\u5927\u698280+\uff0c\u548c\u9884\u671f\u6bd4\u8f83\u63a5\u8fd1\u4e86\uff0c\u7531\u4e8e\u7ebf\u7a0b\u6570\u8fc7\u591a\uff0c\u8fd8\u6709\u4e9b\u4e0a\u4e0b\u6587\u5207\u6362\u7684\u5f00\u9500\uff0c\u518d\u52a0\u4e0a\u6d4b\u8bd5\u7528\u4f8b\u4e0d\u591f\u4e25\u8c28\uff0c\u6240\u4ee5\u5b9e\u9645\u5229\u7528\u7387\u4f4e\u4e00\u4e9b\u4e5f\u6b63\u5e38\u3002<\/p>\n<p>\u628a\u516c\u5f0f\u53d8\u4e2a\u5f62\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u7ebf\u7a0b\u6570\u6765\u8ba1\u7b97CPU\u5229\u7528\u7387\uff1a<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044235424\" alt=\"CleanShot 2023-09-07 at 12.41.11@2x.png\" title=\"CleanShot 2023-09-07 at 12.41.11@2x.png\" loading=\"lazy\"><\/p>\n<p>\u7ebf\u7a0b\u657022 \/ (\u6838\u5fc3\u657012 * (1 + 50(sleep\u65f6\u95f4)\/50(\u5faa\u73af50\/_000\/_000\u8017\u65f6))) \u2248 0.9<\/p>\n<p>\u867d\u7136\u516c\u5f0f\u5f88\u597d\uff0c\u4f46\u5728\u771f\u5b9e\u7684\u7a0b\u5e8f\u4e2d\uff0c<strong>\u4e00\u822c\u5f88\u96be\u83b7\u5f97\u51c6\u786e\u7684\u7b49\u5f85\u65f6\u95f4\u548c\u8ba1\u7b97\u65f6\u95f4\uff0c\u56e0\u4e3a\u7a0b\u5e8f\u5f88\u590d\u6742\uff0c\u4e0d\u53ea\u662f\u201c\u8ba1\u7b97\u201d<\/strong>\u3002\u4e00\u6bb5\u4ee3\u7801\u4e2d\u4f1a\u6709\u5f88\u591a\u7684\u5185\u5b58\u8bfb\u5199\uff0c\u8ba1\u7b97\uff0cI\/O \u7b49\u590d\u5408\u64cd\u4f5c\uff0c\u7cbe\u786e\u7684\u83b7\u53d6\u8fd9\u4e24\u4e2a\u6307\u6807\u5f88\u96be\uff0c\u6240\u4ee5\u5149\u9760\u516c\u5f0f\u8ba1\u7b97\u7ebf\u7a0b\u6570\u8fc7\u4e8e\u7406\u60f3\u5316\u3002<\/p>\n<h2>\u771f\u5b9e\u7a0b\u5e8f\u4e2d\u7684\u7ebf\u7a0b\u6570<\/h2>\n<p>\u90a3\u4e48\u5728\u5b9e\u9645\u7684\u7a0b\u5e8f\u4e2d\uff0c\u6216\u8005\u8bf4\u4e00\u4e9bJava\u7684\u4e1a\u52a1\u7cfb\u7edf\u4e2d\uff0c\u7ebf\u7a0b\u6570\uff08\u7ebf\u7a0b\u6c60\u5927\u5c0f\uff09\u89c4\u5212\u591a\u5c11\u5408\u9002\u5462\uff1f<\/p>\n<p><strong>\u5148\u8bf4\u7ed3\u8bba\uff1a\u6ca1\u6709\u56fa\u5b9a\u7b54\u6848\uff0c\u5148\u8bbe\u5b9a\u9884\u671f\uff0c\u6bd4\u5982\u6211\u671f\u671b\u7684CPU\u5229\u7528\u7387\u5728\u591a\u5c11\uff0c\u8d1f\u8f7d\u5728\u591a\u5c11\uff0cGC\u9891\u7387\u591a\u5c11\u4e4b\u7c7b\u7684\u6307\u6807\u540e\uff0c\u518d\u901a\u8fc7\u6d4b\u8bd5\u4e0d\u65ad\u7684\u8c03\u6574\u5230\u4e00\u4e2a\u5408\u7406\u7684\u7ebf\u7a0b\u6570<\/strong><\/p>\n<p>\u6bd4\u5982\u4e00\u4e2a\u666e\u901a\u7684\uff0cSpringBoot \u4e3a\u57fa\u7840\u7684\u4e1a\u52a1\u7cfb\u7edf\uff0c\u9ed8\u8ba4Tomcat\u5bb9\u5668+HikariCP\u8fde\u63a5\u6c60+G1\u56de\u6536\u5668\uff0c\u5982\u679c\u6b64\u65f6\u9879\u76ee\u4e2d\u4e5f\u9700\u8981\u4e00\u4e2a\u4e1a\u52a1\u573a\u666f\u7684\u591a\u7ebf\u7a0b\uff08\u6216\u8005\u7ebf\u7a0b\u6c60\uff09\u6765\u5f02\u6b65\/\u5e76\u884c\u6267\u884c\u4e1a\u52a1\u6d41\u7a0b\u3002<\/p>\n<p>\u6b64\u65f6\u6211\u6309\u7167\u4e0a\u9762\u7684\u516c\u5f0f\u6765\u89c4\u5212\u7ebf\u7a0b\u6570\u7684\u8bdd\uff0c\u8bef\u5dee\u4e00\u5b9a\u4f1a\u5f88\u5927\u3002\u56e0\u4e3a\u6b64\u65f6\u8fd9\u53f0\u4e3b\u673a\u4e0a\uff0c\u5df2\u7ecf\u6709\u5f88\u591a\u8fd0\u884c\u4e2d\u7684\u7ebf\u7a0b\u4e86\uff0cTomcat\u6709\u81ea\u5df1\u7684\u7ebf\u7a0b\u6c60\uff0cHikariCP\u4e5f\u6709\u81ea\u5df1\u7684\u540e\u53f0\u7ebf\u7a0b\uff0cJVM\u4e5f\u6709\u4e00\u4e9b\u7f16\u8bd1\u7684\u7ebf\u7a0b\uff0c\u8fdeG1\u90fd\u6709\u81ea\u5df1\u7684\u540e\u53f0\u7ebf\u7a0b\u3002\u8fd9\u4e9b\u7ebf\u7a0b\u4e5f\u662f\u8fd0\u884c\u5728\u5f53\u524d\u8fdb\u7a0b\u3001\u5f53\u524d\u4e3b\u673a\u4e0a\u7684\uff0c\u4e5f\u4f1a\u5360\u7528CPU\u7684\u8d44\u6e90\u3002<\/p>\n<p><strong>\u6240\u4ee5\u53d7\u73af\u5883\u5e72\u6270\u4e0b\uff0c\u5355\u9760\u516c\u5f0f\u5f88\u96be\u51c6\u786e\u7684\u89c4\u5212\u7ebf\u7a0b\u6570\uff0c\u4e00\u5b9a\u8981\u901a\u8fc7\u6d4b\u8bd5\u6765\u9a8c\u8bc1\u3002<\/strong><\/p>\n<p>\u6d41\u7a0b\u4e00\u822c\u662f\u8fd9\u6837\uff1a<\/p>\n<ol>\n<li>\u5206\u6790\u5f53\u524d\u4e3b\u673a\u4e0a\uff0c\u6709\u6ca1\u6709\u5176\u4ed6\u8fdb\u7a0b\u5e72\u6270<\/li>\n<li>\u5206\u6790\u5f53\u524dJVM\u8fdb\u7a0b\u4e0a\uff0c\u6709\u6ca1\u6709\u5176\u4ed6\u8fd0\u884c\u4e2d\u6216\u53ef\u80fd\u8fd0\u884c\u7684\u7ebf\u7a0b<\/li>\n<li>\n<p>\u8bbe\u5b9a\u76ee\u6807<\/p>\n<ol>\n<li>\u76ee\u6807CPU\u5229\u7528\u7387 &#8211; \u6211\u6700\u9ad8\u80fd\u5bb9\u5fcd\u6211\u7684CPU\u98d9\u5230\u591a\u5c11\uff1f<\/li>\n<li>\u76ee\u6807GC\u9891\u7387\/\u6682\u505c\u65f6\u95f4 &#8211; \u591a\u7ebf\u7a0b\u6267\u884c\u540e\uff0cGC\u9891\u7387\u4f1a\u589e\u9ad8\uff0c\u6700\u5927\u80fd\u5bb9\u5fcd\u5230\u4ec0\u4e48\u9891\u7387\uff0c\u6bcf\u6b21\u6682\u505c\u65f6\u95f4\u591a\u5c11\uff1f<\/li>\n<li>\u6267\u884c\u6548\u7387 &#8211; \u6bd4\u5982\u6279\u5904\u7406\u65f6\uff0c\u6211\u5355\u4f4d\u65f6\u95f4\u5185\u8981\u5f00\u591a\u5c11\u7ebf\u7a0b\u624d\u80fd\u53ca\u65f6\u5904\u7406\u5b8c\u6bd5<\/li>\n<li>\u2026\u2026<\/li>\n<\/ol>\n<\/li>\n<li>\u68b3\u7406\u94fe\u8def\u5173\u952e\u70b9\uff0c\u662f\u5426\u6709\u5361\u8116\u5b50\u7684\u70b9\uff0c\u56e0\u4e3a\u5982\u679c\u7ebf\u7a0b\u6570\u8fc7\u591a\uff0c\u94fe\u8def\u4e0a\u67d0\u4e9b\u8282\u70b9\u8d44\u6e90\u6709\u9650\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5927\u91cf\u7684\u7ebf\u7a0b\u5728\u7b49\u5f85\u8d44\u6e90\uff08\u6bd4\u5982\u4e09\u65b9\u63a5\u53e3\u9650\u6d41\uff0c\u8fde\u63a5\u6c60\u6570\u91cf\u6709\u9650\uff0c\u4e2d\u95f4\u4ef6\u538b\u529b\u8fc7\u5927\u65e0\u6cd5\u652f\u6491\u7b49\uff09<\/li>\n<li>\u4e0d\u65ad\u7684\u589e\u52a0\/\u51cf\u5c11\u7ebf\u7a0b\u6570\u6765\u6d4b\u8bd5\uff0c\u6309\u6700\u9ad8\u7684\u8981\u6c42\u53bb\u6d4b\u8bd5\uff0c\u6700\u7ec8\u83b7\u5f97\u4e00\u4e2a\u201c\u6ee1\u8db3\u8981\u6c42\u201d\u7684\u7ebf\u7a0b\u6570**<\/li>\n<\/ol>\n<p><strong>\u800c\u4e14\u800c\u4e14\u800c\u4e14\uff01\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u7ebf\u7a0b\u6570\u7406\u5ff5\u4e5f\u6709\u6240\u4e0d\u540c\uff1a<\/strong><\/p>\n<ol>\n<li>Tomcat\u4e2d\u7684maxThreads\uff0c\u5728Blocking I\/O\u548cNo-Blocking I\/O\u4e0b\u5c31\u4e0d\u4e00\u6837<\/li>\n<li>Dubbo \u9ed8\u8ba4\u8fd8\u662f\u5355\u8fde\u63a5\u5462\uff0c\u4e5f\u6709I\/O\u7ebf\u7a0b\uff08\u6c60\uff09\u548c\u4e1a\u52a1\u7ebf\u7a0b\uff08\u6c60\uff09\u7684\u533a\u5206\uff0cI\/O\u7ebf\u7a0b\u4e00\u822c\u4e0d\u662f\u74f6\u9888\uff0c\u6240\u4ee5\u4e0d\u5fc5\u592a\u591a\uff0c\u4f46\u4e1a\u52a1\u7ebf\u7a0b\u5f88\u5bb9\u6613\u79f0\u4e3a\u74f6\u9888<\/li>\n<li>Redis 6.0\u4ee5\u540e\u4e5f\u662f\u591a\u7ebf\u7a0b\u4e86\uff0c\u4e0d\u8fc7\u5b83\u53ea\u662fI\/O \u591a\u7ebf\u7a0b\uff0c\u201c\u4e1a\u52a1\u201d\u5904\u7406\u8fd8\u662f\u5355\u7ebf\u7a0b<\/li>\n<\/ol>\n<p><strong>\u6240\u4ee5\uff0c\u4e0d\u8981\u7ea0\u7ed3\u8bbe\u7f6e\u591a\u5c11\u7ebf\u7a0b\u4e86\u3002\u6ca1\u6709\u6807\u51c6\u7b54\u6848\uff0c\u4e00\u5b9a\u8981\u7ed3\u5408\u573a\u666f\uff0c\u5e26\u7740\u76ee\u6807\uff0c\u901a\u8fc7\u6d4b\u8bd5\u53bb\u627e\u5230\u4e00\u4e2a\u6700\u5408\u9002\u7684\u7ebf\u7a0b\u6570\u3002<\/strong><\/p>\n<p>\u53ef\u80fd\u8fd8\u6709\u540c\u5b66\u53ef\u80fd\u4f1a\u6709\u7591\u95ee\uff1a\u201c\u6211\u4eec\u7cfb\u7edf\u4e5f\u6ca1\u5565\u538b\u529b\uff0c\u4e0d\u9700\u8981\u90a3\u4e48\u5408\u9002\u7684\u7ebf\u7a0b\u6570\uff0c\u53ea\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5f02\u6b65\u573a\u666f\uff0c\u4e0d\u5f71\u54cd\u7cfb\u7edf\u5176\u4ed6\u529f\u80fd\u5c31\u53ef\u4ee5\u201d<\/p>\n<p>\u5f88\u6b63\u5e38\uff0c\u5f88\u591a\u7684\u5185\u90e8\u4e1a\u52a1\u7cfb\u7edf\uff0c\u5e76\u4e0d\u9700\u8981\u5565\u6027\u80fd\uff0c\u7a33\u5b9a\u597d\u7528\u7b26\u5408\u9700\u6c42\u5c31\u53ef\u4ee5\u4e86\u3002\u90a3\u4e48\u6211\u7684\u63a8\u8350\u7684\u7ebf\u7a0b\u6570\u662f\uff1a<strong>CPU\u6838\u5fc3\u6570<\/strong><\/p>\n<h2>\u9644\u5f55<\/h2>\n<h4>Java \u83b7\u53d6CPU\u6838\u5fc3\u6570<\/h4>\n<pre><code>Runtime.getRuntime().availableProcessors()\/\/\u83b7\u53d6\u903b\u8f91\u6838\u5fc3\u6570\uff0c\u59826\u6838\u5fc312\u7ebf\u7a0b\uff0c\u90a3\u4e48\u8fd4\u56de\u7684\u662f12\n\n<\/code><\/pre>\n<h4>Linux \u83b7\u53d6CPU\u6838\u5fc3\u6570<\/h4>\n<pre><code># \u603b\u6838\u6570 = \u7269\u7406CPU\u4e2a\u6570 X \u6bcf\u9897\u7269\u7406CPU\u7684\u6838\u6570 \n# \u603b\u903b\u8f91CPU\u6570 = \u7269\u7406CPU\u4e2a\u6570 X \u6bcf\u9897\u7269\u7406CPU\u7684\u6838\u6570 X \u8d85\u7ebf\u7a0b\u6570\n\n# \u67e5\u770b\u7269\u7406CPU\u4e2a\u6570\ncat \/proc\/cpuinfo| grep &quot;physical id&quot;| sort| uniq| wc -l\n\n# \u67e5\u770b\u6bcf\u4e2a\u7269\u7406CPU\u4e2dcore\u7684\u4e2a\u6570(\u5373\u6838\u6570)\ncat \/proc\/cpuinfo| grep &quot;cpu cores&quot;| uniq\n\n# \u67e5\u770b\u903b\u8f91CPU\u7684\u4e2a\u6570\ncat \/proc\/cpuinfo| grep &quot;processor&quot;| wc -l\n\n<\/code><\/pre>\n<blockquote>\n<p>\u5982\u679c\u6211\u7684\u6587\u7ae0\u5bf9\u60a8\u6709\u5e2e\u52a9\uff0c\u8bf7\u70b9\u8d5e\/\u6536\u85cf\/\u5173\u6ce8\u9f13\u52b1\u652f\u6301\u4e00\u4e0b\u5427\u2764\u2764\u2764\u2764\u2764\u2764<\/p>\n<p>\u4f5c\u8005\uff1a\u4eac\u4e1c\u4fdd\u9669 \u848b\u4fe1<\/p>\n<p>\u6765\u6e90\uff1a\u4eac\u4e1c\u4e91\u5f00\u53d1\u8005\u793e\u533a \u8f6c\u8f7d\u8bf7\u6ce8\u660e\u6765\u6e90<\/p>\n<\/blockquote>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000044235410\">https:\/\/segmentfault.com\/a\/1190000044235410<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u80fd\u5f88\u591a\u4eba\u90fd\u770b\u5230\u8fc7\u4e00\u4e2a\u7ebf\u7a0b\u6570\u8bbe\u7f6e\u7684\u7406\u8bba\uff1a CPU \u5bc6\u96c6\u578b\u7684\u7a0b\u5e8f &#8211; \u6838\u5fc3\u6570 + 1 I\/O \u5bc6\u96c6\u578b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10008298","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008298"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008298\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}