{"id":28630,"date":"2025-04-20T01:56:02","date_gmt":"2025-04-19T17:56:02","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/28630.html"},"modified":"2025-04-20T01:56:02","modified_gmt":"2025-04-19T17:56:02","slug":"%e6%94%b6%e5%88%b0%e7%ba%bf%e4%b8%8a%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%87%ba%e7%8e%b0cpu%e5%91%8a%e8%ad%a6%e4%b8%80%e8%88%ac%e6%80%8e%e4%b9%88%e6%8e%92%e6%9f%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/28630.html","title":{"rendered":"\u6536\u5230\u7ebf\u4e0a\u670d\u52a1\u5668\u51fa\u73b0cpu\u544a\u8b66\u4e00\u822c\u600e\u4e48\u6392\u67e5\uff1f"},"content":{"rendered":"<p>\u5f53\u7ebf\u4e0a\u670d\u52a1\u5668\u51fa\u73b0CPU\u544a\u8b66\u65f6&#xff0c;\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u7cfb\u7edf\u6027\u6392\u67e5&#xff0c;\u9010\u6b65\u5b9a\u4f4d\u95ee\u9898\u6839\u6e90&#xff1a;<\/p>\n<hr \/>\n<h4>1. \u5feb\u901f\u786e\u8ba4CPU\u4f7f\u7528\u60c5\u51b5<\/h4>\n<ul>\n<li>\u547d\u4ee4\u5de5\u5177&#xff1a;<span class=\"token function\">top<\/span>                          <span class=\"token comment\"># \u5b9e\u65f6\u67e5\u770bCPU\u5360\u7528&#xff08;\u6309P\u6392\u5e8f\u8fdb\u7a0b&#xff09;<\/span><br \/>\n<span class=\"token function\">htop<\/span>                         <span class=\"token comment\"># \u589e\u5f3a\u7248top&#xff0c;\u652f\u6301\u53ef\u89c6\u5316\u64cd\u4f5c<\/span><br \/>\nmpstat <span class=\"token parameter variable\">-P<\/span> ALL <span class=\"token number\">1<\/span>              <span class=\"token comment\"># \u67e5\u770b\u6bcf\u4e2aCPU\u6838\u5fc3\u7684\u8be6\u7ec6\u5229\u7528\u7387<\/span><br \/>\nsar <span class=\"token parameter variable\">-u<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">5<\/span>                   <span class=\"token comment\"># \u5386\u53f2CPU\u4f7f\u7528\u7387\u7edf\u8ba1&#xff08;\u9700\u5b89\u88c5sysstat&#xff09;<\/span>\n <\/li>\n<li>\u5173\u6ce8\u6307\u6807&#xff1a;\n<ul>\n<li>%us&#xff08;\u7528\u6237\u6001&#xff09;\u9ad8&#xff1a;\u5e94\u7528\u4ee3\u7801\u6d88\u8017CPU\u3002<\/li>\n<li>%sy&#xff08;\u5185\u6838\u6001&#xff09;\u9ad8&#xff1a;\u7cfb\u7edf\u8c03\u7528\u6216\u4e2d\u65ad\u9891\u7e41\u3002<\/li>\n<li>%wa&#xff08;I\/O\u7b49\u5f85&#xff09;&#xff1a;\u9ad8\u5219\u53ef\u80fd\u78c1\u76d8\/\u7f51\u7edcIO\u6210\u4e3a\u74f6\u9888\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>2. \u5b9a\u4f4d\u9ad8CPU\u8fdb\u7a0b\/\u7ebf\u7a0b<\/h4>\n<ul>\n<li>\u67e5\u770b\u8fdb\u7a0b&#xff1a;<span class=\"token function\">top<\/span> <span class=\"token parameter variable\">-c<\/span>                       <span class=\"token comment\"># \u663e\u793a\u5b8c\u6574\u547d\u4ee4&#xff0c;\u786e\u8ba4\u53ef\u7591\u8fdb\u7a0b<\/span><br \/>\n<span class=\"token function\">ps<\/span> <span class=\"token parameter variable\">-eo<\/span> pid,pcpu,comm,args <span class=\"token parameter variable\">&#8211;sort<\/span><span class=\"token operator\">&#061;<\/span>-%cpu <span class=\"token operator\">|<\/span> <span class=\"token function\">head<\/span>  <span class=\"token comment\"># \u6309CPU\u6392\u5e8f\u8fdb\u7a0b<\/span>\n <\/li>\n<li>\u6df1\u5165\u7ebf\u7a0b&#xff1a;<span class=\"token function\">top<\/span> <span class=\"token parameter variable\">-H<\/span> <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span>              <span class=\"token comment\"># \u67e5\u770b\u6307\u5b9a\u8fdb\u7a0b\u7684\u7ebf\u7a0b&#xff08;\u6309P\u6392\u5e8f&#xff09;<\/span><br \/>\npidstat <span class=\"token parameter variable\">-t<\/span> <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token number\">1<\/span>        <span class=\"token comment\"># \u7edf\u8ba1\u7ebf\u7a0b\u7ea7CPU\u4f7f\u7528<\/span>\n <\/li>\n<\/ul>\n<hr \/>\n<h4>3. \u5206\u6790\u8fdb\u7a0b\u5185\u90e8\u72b6\u6001<\/h4>\n<ul>\n<li>\n<p>Java\u5e94\u7528&#xff1a;<\/p>\n<p> jstack <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token operator\">&gt;<\/span> thread_dump.log      <span class=\"token comment\"># \u751f\u6210\u7ebf\u7a0b\u5feb\u7167<\/span><br \/>\njstat <span class=\"token parameter variable\">-gcutil<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token number\">1000<\/span>            <span class=\"token comment\"># \u68c0\u67e5GC\u60c5\u51b5&#xff08;\u9891\u7e41GC\u53ef\u80fd\u5bfc\u81f4CPU\u9ad8&#xff09;<\/span><\/p>\n<ul>\n<li>\u7528\u5de5\u5177&#xff08;\u5982fastthread&#xff09;\u5206\u6790jstack\u8f93\u51fa&#xff0c;\u67e5\u627eRUNNABLE\u72b6\u6001\u7684\u7ebf\u7a0b\u53ca\u5806\u6808\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5176\u4ed6\u8bed\u8a00&#xff08;\u5982C\/C&#043;&#043;\/Go&#xff09;&#xff1a;<\/p>\n<p> pstack <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span>                 <span class=\"token comment\"># \u67e5\u770b\u8fdb\u7a0b\u7684\u7ebf\u7a0b\u5806\u6808&#xff08;\u53ef\u80fd\u9700gdb&#xff09;<\/span><br \/>\nperf <span class=\"token function\">top<\/span> <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span>            <span class=\"token comment\"># \u5b9e\u65f6\u5206\u6790\u51fd\u6570\u7ea7CPU\u5360\u7528<\/span><br \/>\ngdb <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token parameter variable\">-ex<\/span> <span class=\"token string\">&#034;thread apply all bt&#034;<\/span> <span class=\"token parameter variable\">&#8211;batch<\/span> <span class=\"token operator\">&gt;<\/span> gdb_dump.log  <span class=\"token comment\"># \u751f\u6210\u5b8c\u6574\u5806\u6808<\/span>\n <\/li>\n<\/ul>\n<hr \/>\n<h4>4. \u68c0\u67e5\u7cfb\u7edf\u7ea7\u74f6\u9888<\/h4>\n<ul>\n<li>\n<p>I\/O\u74f6\u9888&#xff1a;<\/p>\n<p> iostat <span class=\"token parameter variable\">-x<\/span> <span class=\"token number\">1<\/span>                  <span class=\"token comment\"># \u67e5\u770b\u78c1\u76d8IO\u8d1f\u8f7d&#xff08;%util\u9ad8\u8868\u793a\u74f6\u9888&#xff09;<\/span><br \/>\ndstat                        <span class=\"token comment\"># \u7efc\u5408\u76d1\u63a7&#xff08;CPU\u3001\u78c1\u76d8\u3001\u7f51\u7edc&#xff09;<\/span>\n <\/li>\n<li>\n<p>\u7f51\u7edc\u74f6\u9888&#xff1a;<\/p>\n<p> sar <span class=\"token parameter variable\">-n<\/span> DEV <span class=\"token number\">1<\/span>                 <span class=\"token comment\"># \u7f51\u7edc\u6d41\u91cf\u7edf\u8ba1<\/span><br \/>\nss <span class=\"token parameter variable\">-s<\/span>                        <span class=\"token comment\"># \u67e5\u770b\u8fde\u63a5\u7edf\u8ba1&#xff08;TIME-WAIT\u8fc7\u591a&#xff1f;&#xff09;<\/span>\n <\/li>\n<li>\n<p>\u4e0a\u4e0b\u6587\u5207\u6362\/\u4e2d\u65ad&#xff1a;<\/p>\n<p> <span class=\"token function\">vmstat<\/span> <span class=\"token number\">1<\/span>                     <span class=\"token comment\"># \u67e5\u770bcs&#xff08;\u4e0a\u4e0b\u6587\u5207\u6362&#xff09;\u3001in&#xff08;\u4e2d\u65ad&#xff09;<\/span><br \/>\npidstat <span class=\"token parameter variable\">-w<\/span> <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token number\">1<\/span>        <span class=\"token comment\"># \u8fdb\u7a0b\u7ea7\u4e0a\u4e0b\u6587\u5207\u6362\u7edf\u8ba1<\/span>\n <\/li>\n<\/ul>\n<hr \/>\n<h4>5. \u7ed3\u5408\u65e5\u5fd7\u4e0e\u76d1\u63a7<\/h4>\n<ul>\n<li>\n<p>\u5e94\u7528\u65e5\u5fd7&#xff1a;<\/p>\n<ul>\n<li>\u68c0\u67e5\u9519\u8bef\u65e5\u5fd7&#xff08;\u5982grep -i error \/var\/log\/app\/*.log&#xff09;\u3002<\/li>\n<li>\u5173\u6ce8\u9ad8\u9891\u65e5\u5fd7\u8f93\u51fa&#xff08;\u53ef\u80fd\u662f\u5faa\u73af\u62a5\u9519\u6216\u5f02\u5e38\u903b\u8f91&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u7cfb\u7edf\u65e5\u5fd7&#xff1a;<\/p>\n<p> <span class=\"token function\">dmesg<\/span> <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> <span class=\"token parameter variable\">-i<\/span> <span class=\"token string\">&#034;error&#034;<\/span>      <span class=\"token comment\"># \u68c0\u67e5\u5185\u6838\u65e5\u5fd7<\/span><br \/>\njournalctl <span class=\"token parameter variable\">&#8211;since<\/span> <span class=\"token string\">&#034;5 minutes ago&#034;<\/span>  <span class=\"token comment\"># \u67e5\u770b\u8fd1\u671f\u7cfb\u7edf\u65e5\u5fd7&#xff08;systemd\u7cfb\u7edf&#xff09;<\/span>\n <\/li>\n<li>\n<p>\u76d1\u63a7\u7cfb\u7edf&#xff08;\u5982Prometheus\u3001Zabbix&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\u68c0\u67e5\u5386\u53f2\u8d8b\u52bf&#xff1a;CPU\u5347\u9ad8\u662f\u5426\u4f34\u968f\u6d41\u91cf\u7a81\u589e&#xff1f;<\/li>\n<li>\u5173\u8054\u6307\u6807&#xff1a;\u5185\u5b58\u3001\u78c1\u76d8\u3001\u7f51\u7edc\u3001\u5e94\u7528\u4e2d\u95f4\u4ef6&#xff08;\u5982\u6570\u636e\u5e93\u8fde\u63a5\u6c60&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>6. \u4ee3\u7801\/\u914d\u7f6e\u7ea7\u68c0\u67e5<\/h4>\n<ul>\n<li>\n<p>\u4ee3\u7801\u70ed\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528\u6027\u80fd\u5206\u6790\u5de5\u5177\u751f\u6210\u706b\u7130\u56fe&#xff1a;perf record <span class=\"token parameter variable\">-F<\/span> <span class=\"token number\">99<\/span> <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token parameter variable\">-g<\/span> &#8212; <span class=\"token function\">sleep<\/span> <span class=\"token number\">30<\/span>  <span class=\"token comment\"># \u91c7\u6837<\/span><br \/>\nperf script <span class=\"token operator\">&gt;<\/span> out.perf<br \/>\nflamegraph.pl out.perf <span class=\"token operator\">&gt;<\/span> flamegraph.svg    <span class=\"token comment\"># \u751f\u6210\u706b\u7130\u56fe<\/span>\n <\/li>\n<li>\u5206\u6790\u706b\u7130\u56fe&#xff0c;\u627e\u5230\u5360\u7528CPU\u9ad8\u7684\u51fd\u6570\u6216\u4ee3\u7801\u5757\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u914d\u7f6e\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>\u7ebf\u7a0b\u6c60\u914d\u7f6e\u4e0d\u5408\u7406&#xff08;\u8fc7\u591a\/\u8fc7\u5c11&#xff09;\u3002<\/li>\n<li>\u7f13\u5b58\u5931\u6548\u5bfc\u81f4\u9891\u7e41\u8ba1\u7b97\u3002<\/li>\n<li>JVM\u53c2\u6570\u4e0d\u5f53&#xff08;\u5982\u5806\u5927\u5c0f\u3001GC\u7b56\u7565&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>7. \u5b89\u5168\u6392\u67e5<\/h4>\n<ul>\n<li>\u53ef\u7591\u8fdb\u7a0b&#xff1a;<span class=\"token function\">lsof<\/span> <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span>                <span class=\"token comment\"># \u67e5\u770b\u8fdb\u7a0b\u6253\u5f00\u7684\u6587\u4ef6\/\u7f51\u7edc<\/span><br \/>\n<span class=\"token function\">netstat<\/span> <span class=\"token parameter variable\">-antp<\/span> <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span>   <span class=\"token comment\"># \u68c0\u67e5\u5f02\u5e38\u8fde\u63a5<\/span>\n <\/li>\n<li>\u6316\u77ff\u75c5\u6bd2&#xff1a;\n<ul>\n<li>\u68c0\u67e5\u672a\u77e5\u8fdb\u7a0b\u3001\u8ba1\u5212\u4efb\u52a1&#xff08;crontab -l&#xff09;\u3001\u542f\u52a8\u9879\u3002<\/li>\n<li>\u4f7f\u7528rkhunter\u3001chkrootkit\u626b\u63cf\u540e\u95e8\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>8. \u5e38\u89c1\u573a\u666f\u901f\u67e5<\/h4>\n<ul>\n<li>\n<p>\u573a\u666f1&#xff1a;GC\u9891\u7e41 \u73b0\u8c61&#xff1a;jstat\u663e\u793aGC\u65f6\u95f4\u5360\u6bd4\u9ad8&#xff0c;\u5e94\u7528\u5361\u987f\u3002 \u89e3\u51b3&#xff1a;\u8c03\u6574JVM\u5806\u5927\u5c0f\/\u9009\u62e9\u4f4e\u5ef6\u8fdfGC\u7b97\u6cd5&#xff08;\u5982G1\/CMS&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u573a\u666f2&#xff1a;\u6b7b\u5faa\u73af\/\u6b7b\u9501 \u73b0\u8c61&#xff1a;\u7ebf\u7a0b\u5806\u6808\u4e2d\u540c\u4e00\u65b9\u6cd5\u53cd\u590d\u51fa\u73b0\u3002 \u89e3\u51b3&#xff1a;\u5206\u6790\u4ee3\u7801\u903b\u8f91&#xff0c;\u4fee\u590d\u5e76\u53d1\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p>\u573a\u666f3&#xff1a;\u5916\u90e8\u4f9d\u8d56\u74f6\u9888 \u73b0\u8c61&#xff1a;CPU\u9ad8\u4f34\u968f\u5927\u91cfI\/O\u7b49\u5f85\u6216\u7f51\u7edc\u8d85\u65f6\u3002 \u89e3\u51b3&#xff1a;\u4f18\u5316\u6570\u636e\u5e93\u67e5\u8be2\u3001\u589e\u52a0\u7f13\u5b58\u3001\u964d\u7ea7\u975e\u6838\u5fc3\u529f\u80fd\u3002<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>\u603b\u7ed3\u6d41\u7a0b<\/h4>\n<li>\u786e\u8ba4\u95ee\u9898 \u2192 2. \u5b9a\u4f4d\u8fdb\u7a0b \u2192 3. \u5206\u6790\u7ebf\u7a0b \u2192 4. \u5173\u8054\u65e5\u5fd7\/\u76d1\u63a7 \u2192 5. \u4ee3\u7801\/\u7cfb\u7edf\u8c03\u4f18 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