{"id":348639,"date":"2022-02-22T16:00:24","date_gmt":"2022-02-22T08:00:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/348639\/"},"modified":"2022-02-22T16:00:24","modified_gmt":"2022-02-22T08:00:24","slug":"cpu%e9%a3%99%e9%ab%98%ef%bc%8c%e7%b3%bb%e7%bb%9f%e6%80%a7%e8%83%bd%e9%97%ae%e9%a2%98%e5%a6%82%e4%bd%95%e6%8e%92%e6%9f%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/348639\/","title":{"rendered":"CPU\u98d9\u9ad8\uff0c\u7cfb\u7edf\u6027\u80fd\u95ee\u9898\u5982\u4f55\u6392\u67e5\uff1f"},"content":{"rendered":"<p style=\"text-align: center\"><span>[[344475]]<\/span><\/p>\n<p>\u538b\u6d4b\u65f6\u6216\u591a\u6216\u5c11\u90fd\u6536\u5230\u8fc7CPU\u6216\u8005Load\u9ad8\u7684\u544a\u8b66\uff0c\u5982\u679c\u662f\u5355\u673a\u5076\u53d1\u6027\u7684\uff0c\u7ecf\u5e38\u4f1a\u8ba4\u4e3a\u662f\u201c\u5bbf\u4e3b\u673a\u62a2\u5360\u5bfc\u81f4\u7684\u201d\uff0c\u90a3\u4e8b\u5b9e\u662f\u5426\u771f\u662f\u5982\u6b64\u5462?\u662f\u4ec0\u4e48\u5f15\u8d77\u4e86\u8fd9\u4e9b\u6307\u6807\u7684\u98d9\u9ad8?\u7f51\u7edc\u3001\u78c1\u76d8\u8fd8\u662f\u9ad8\u5e76\u53d1?\u6709\u4ec0\u4e48\u5de5\u5177\u53ef\u4ee5\u5b9a\u4f4d?TOP\u3001PS\u8fd8\u662fvmstat?CPU\u9ad8&amp;Load\u9ad8\u548cCPU\u4f4e&amp;Load\u9ad8\uff0c\u4e0d\u540c\u7684\u8868\u5f81\u53c8\u4ee3\u8868\u7740\u4ec0\u4e48?<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p><strong>\u4e00 \u80cc\u666f\u77e5\u8bc6<\/strong><\/p>\n<p><strong>LINUX\u8fdb\u7a0b\u72b6\u6001<\/strong><\/p>\n<p>LINUX 2.6\u4ee5\u540e\u7684\u5185\u6838\u4e2d\uff0c\u8fdb\u7a0b\u4e00\u822c\u5b58\u57287\u79cd\u57fa\u7840\u72b6\u6001\uff1aD-\u4e0d\u53ef\u4e2d\u65ad\u7761\u7720\u3001R-\u53ef\u6267\u884c\u3001S-\u53ef\u4e2d\u65ad\u7761\u7720\u3001T-\u6682\u505c\u6001\u3001t-\u8ddf\u8e2a\u6001\u3001X-\u6b7b\u4ea1\u6001\u3001Z-\u50f5\u5c38\u6001\uff0c\u8fd9\u51e0\u79cd\u72b6\u6001\u5728PS\u547d\u4ee4\u4e2d\u6709\u5bf9\u5e94\u89e3\u91ca\u3002<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<ul>\n<li>D (TASK_UNINTERRUPTIBLE)\uff0c\u4e0d\u53ef\u4e2d\u65ad\u7761\u7720\u6001\u3002\u987e\u540d\u601d\u4e49\uff0c\u4f4d\u4e8e\u8fd9\u79cd\u72b6\u6001\u7684\u8fdb\u7a0b\u5904\u4e8e\u7761\u7720\u4e2d\uff0c\u5e76\u4e14\u4e0d\u5141\u8bb8\u88ab\u5176\u4ed6\u8fdb\u7a0b\u6216\u4e2d\u65ad(\u5f02\u6b65\u4fe1\u53f7)\u6253\u65ad\u3002\u56e0\u6b64\u8fd9\u79cd\u72b6\u6001\u7684\u8fdb\u7a0b\uff0c\u662f\u65e0\u6cd5\u4f7f\u7528kill -9\u6740\u6b7b\u7684(kill\u4e5f\u662f\u4e00\u79cd\u4fe1\u53f7)\uff0c\u9664\u975e\u91cd\u542f\u7cfb\u7edf(\u6ca1\u9519\uff0c\u5c31\u662f\u8fd9\u4e48\u5934\u786c)\u3002\u4e0d\u8fc7\u8fd9\u79cd\u72b6\u6001\u4e00\u822c\u7531I\/O\u7b49\u5f85(\u6bd4\u5982\u78c1\u76d8I\/O\u3001\u7f51\u7edcI\/O\u3001\u5916\u8bbeI\/O\u7b49)\u5f15\u8d77\uff0c\u51fa\u73b0\u65f6\u95f4\u975e\u5e38\u77ed\u6682\uff0c\u5927\u591a\u5f88\u96be\u88abPS\u6216\u8005TOP\u547d\u4ee4\u6355\u83b7(\u9664\u975eI\/O HANG\u6b7b)\u3002SLEEP\u6001\u8fdb\u7a0b\u4e0d\u4f1a\u5360\u7528\u4efb\u4f55CPU\u8d44\u6e90\u3002<\/li>\n<li>R (TASK_RUNNING)\uff0c\u53ef\u6267\u884c\u6001\u3002\u8fd9\u79cd\u72b6\u6001\u7684\u8fdb\u7a0b\u90fd\u4f4d\u4e8eCPU\u7684\u53ef\u6267\u884c\u961f\u5217\u4e2d\uff0c\u6b63\u5728\u8fd0\u884c\u6216\u8005\u6b63\u5728\u7b49\u5f85\u8fd0\u884c\uff0c\u5373\u4e0d\u662f\u5728\u4e0a\u73ed\u5c31\u662f\u5728\u4e0a\u73ed\u7684\u8def\u4e0a\u3002<\/li>\n<li>S (TASK_INTERRUPTIBLE)\uff0c\u53ef\u4e2d\u65ad\u7761\u7720\u6001\u3002\u4e0d\u540c\u4e8eD\uff0c\u8fd9\u79cd\u72b6\u6001\u7684\u8fdb\u7a0b\u867d\u7136\u4e5f\u5904\u4e8e\u7761\u7720\u4e2d\uff0c\u4f46\u662f\u662f\u5141\u8bb8\u88ab\u4e2d\u65ad\u7684\u3002\u8fd9\u79cd\u8fdb\u7a0b\u4e00\u822c\u5728\u7b49\u5f85\u67d0\u4e8b\u4ef6\u7684\u53d1\u751f(\u6bd4\u5982socket\u8fde\u63a5\u3001\u4fe1\u53f7\u91cf\u7b49)\uff0c\u800c\u88ab\u6302\u8d77\u3002\u4e00\u65e6\u8fd9\u4e9b\u65f6\u95f4\u5b8c\u6210\uff0c\u8fdb\u7a0b\u5c06\u88ab\u5524\u9192\u8f6c\u4e3aR\u6001\u3002\u5982\u679c\u4e0d\u5728\u9ad8\u8d1f\u8f7d\u65f6\u671f\uff0c\u7cfb\u7edf\u4e2d\u5927\u90e8\u5206\u8fdb\u7a0b\u90fd\u5904\u4e8eS\u6001\u3002SLEEP\u6001\u8fdb\u7a0b\u4e0d\u4f1a\u5360\u7528\u4efb\u4f55CPU\u8d44\u6e90\u3002<\/li>\n<li>T&amp;t (__TASK_STOPPED &amp; __TASK_TRACED)\uff0c\u6682\u505cor\u8ddf\u8e2a\u6001\u3002\u8fd9\u79cd\u4e24\u79cd\u72b6\u6001\u7684\u8fdb\u7a0b\u90fd\u5904\u4e8e\u8fd0\u884c\u505c\u6b62\u7684\u72b6\u6001\u3002\u4e0d\u540c\u4e4b\u5904\u662f\u6682\u505c\u6001\u4e00\u822c\u7531\u4e8e\u6536\u5230SIGSTOP\u3001SIGTSTP\u3001SIGTTIN\u3001SIGTTOUT\u56db\u79cd\u4fe1\u53f7\u88ab\u505c\u6b62\uff0c\u800c\u8ddf\u8e2a\u6001\u662f\u7531\u4e8e\u8fdb\u7a0b\u88ab\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u8ddf\u8e2a\u5f15\u8d77(\u6bd4\u5982gdb\u65ad\u70b9)\u3002\u6682\u505c\u6001\u8fdb\u7a0b\u4f1a\u91ca\u653e\u6240\u6709\u5360\u7528\u8d44\u6e90\u3002<\/li>\n<li>Z (EXIT_ZOMBIE), \u50f5\u5c38\u6001\u3002\u8fd9\u79cd\u72b6\u6001\u7684\u8fdb\u7a0b\u5b9e\u9645\u4e0a\u5df2\u7ecf\u7ed3\u675f\u4e86\uff0c\u4f46\u662f\u7236\u8fdb\u7a0b\u8fd8\u6ca1\u6709\u56de\u6536\u5b83\u7684\u8d44\u6e90(\u6bd4\u5982\u8fdb\u7a0b\u7684\u63cf\u8ff0\u7b26\u3001PID\u7b49)\u3002\u50f5\u5c38\u6001\u8fdb\u7a0b\u4f1a\u91ca\u653e\u9664\u8fdb\u7a0b\u5165\u53e3\u4e4b\u5916\u7684\u6240\u6709\u8d44\u6e90\u3002<\/li>\n<li>X (EXIT_DEAD), \u6b7b\u4ea1\u6001\u3002\u8fdb\u7a0b\u7684\u771f\u6b63\u7ed3\u675f\u6001\uff0c\u8fd9\u79cd\u72b6\u6001\u4e00\u822c\u5728\u6b63\u5e38\u7cfb\u7edf\u4e2d\u6355\u83b7\u4e0d\u5230\u3002<\/li>\n<\/ul>\n<p><strong>Load Average &amp; CPU\u4f7f\u7528\u7387<\/strong><\/p>\n<p>\u8c08\u5230\u7cfb\u7edf\u6027\u80fd\uff0cLoad\u548cCPU\u4f7f\u7528\u7387\u662f\u6700\u76f4\u89c2\u7684\u4e24\u4e2a\u6307\u6807\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u6307\u6807\u662f\u600e\u4e48\u88ab\u8ba1\u7b97\u51fa\u6765\u7684\u5462?\u662f\u5426\u80fd\u4e92\u76f8\u7b49\u4ef7\u5462?<\/p>\n<p><strong>Load Average<\/strong><\/p>\n<p>\u4e0d\u5c11\u4eba\u90fd\u8ba4\u4e3a\uff0cLoad\u4ee3\u8868\u6b63\u5728CPU\u4e0a\u8fd0\u884c&amp;\u7b49\u5f85\u8fd0\u884c\u7684\u8fdb\u7a0b\u6570\uff0c\u5373<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>\u4f46Linux\u7cfb\u7edf\u4e2d\uff0c\u8fd9\u79cd\u63cf\u8ff0\u5e76\u4e0d\u5b8c\u5168\u51c6\u786e\u3002<\/p>\n<p>\u4ee5\u4e0b\u4e3aLinux\u5185\u6838\u6e90\u7801\u4e2dLoad Average\u8ba1\u7b97\u65b9\u6cd5\uff0c\u53ef\u4ee5\u770b\u51fa\u6765\uff0c\u56e0\u6b64\u9664\u4e86\u53ef\u6267\u884c\u6001\u8fdb\u7a0b\uff0c\u4e0d\u53ef\u4e2d\u65ad\u7761\u7720\u6001\u8fdb\u7a0b\u4e5f\u4f1a\u88ab\u4e00\u8d77\u7eb3\u5165\u8ba1\u7b97\uff0c\u5373\uff1a<\/p>\n<p style=\"text-align: center\">\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>602staticunsignedlongcount_active_tasks(void)&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>603&nbsp;{&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>604structtask_struct*p;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>605unsignedlongnr=0;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>606607read_lock(&amp;tasklist_lock);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>608for_each_task(p)&nbsp;{&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>609if&nbsp;((p-&gt;state==TASK_RUNNING610&nbsp;(p-&gt;state&amp;TASK_UNINTERRUPTIBLE)))&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>611nr+=FIXED_1;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>612&nbsp;}&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>613read_unlock(&amp;tasklist_lock);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>614returnnr;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>615&nbsp;}&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>......&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>625staticinlinevoidcalc_load(unsignedlongticks)&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>626&nbsp;{&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>627unsignedlongactive_tasks;&nbsp;\/*&nbsp;fixed-point&nbsp;*\/628staticintcount=LOAD_FREQ;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>629630count-=ticks;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>631if&nbsp;(<span>count<\/span><span>&lt;0)&nbsp;{&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>632count+=LOAD_FREQ;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>633active_tasks=count_active_tasks();&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>634CALC_LOAD(avenrun[0],&nbsp;EXP_1,&nbsp;active_tasks);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>635CALC_LOAD(avenrun[1],&nbsp;EXP_5,&nbsp;active_tasks);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>636CALC_LOAD(avenrun[2],&nbsp;EXP_15,&nbsp;active_tasks);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>637&nbsp;}&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>638&nbsp;}&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u5728\u524d\u6587 Linux\u8fdb\u7a0b\u72b6\u6001 \u4e2d\u6709\u63d0\u5230\u8fc7\uff0c\u4e0d\u53ef\u4e2d\u65ad\u7761\u7720\u6001\u7684\u8fdb\u7a0b(TASK_UNINTERRUTED)\u4e00\u822c\u90fd\u5728\u8fdb\u884cI\/O\u7b49\u5f85\uff0c\u6bd4\u5982\u78c1\u76d8\u3001\u7f51\u7edc\u6216\u8005\u5176\u4ed6\u5916\u8bbe\u7b49\u5f85\u3002\u7531\u6b64\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0cLoad Average\u5728Linux\u4e2d\u4f53\u73b0\u7684\u662f\u6574\u4f53\u7cfb\u7edf\u8d1f\u8f7d\uff0c\u5373CPU\u8d1f\u8f7d + Disk\u8d1f\u8f7d + \u7f51\u7edc\u8d1f\u8f7d + \u5176\u4f59\u5916\u8bbe\u8d1f\u8f7d\uff0c\u5e76\u4e0d\u80fd\u5b8c\u5168\u7b49\u540c\u4e8eCPU\u4f7f\u7528\u7387(\u8fd9\u79cd\u60c5\u51b5\u53ea\u51fa\u73b0\u5728Linux\u4e2d\uff0c\u5176\u4f59\u7cfb\u7edf\u6bd4\u5982Unix\uff0cLoad\u8fd8\u662f\u53ea\u4ee3\u8868CPU\u8d1f\u8f7d)\u3002<\/p>\n<p><strong>CPU\u4f7f\u7528\u7387<\/strong><\/p>\n<p>CPU\u7684\u65f6\u95f4\u5206\u7247\u4e00\u822c\u53ef\u5206\u4e3a4\u5927\u7c7b\uff1a\u7528\u6237\u8fdb\u7a0b\u8fd0\u884c\u65f6\u95f4 - User Time, \u7cfb\u7edf\u5185\u6838\u8fd0\u884c\u65f6\u95f4 - System Time, \u7a7a\u95f2\u65f6\u95f4 - Idle Time, \u88ab\u62a2\u5360\u65f6\u95f4 - Steal Time\u3002\u9664\u4e86Idle Time\u5916\uff0c\u5176\u4f59\u65f6\u95f4CPU\u90fd\u5904\u4e8e\u5de5\u4f5c\u8fd0\u884c\u72b6\u6001\u3002<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>\u901a\u5e38\u800c\u8a00\uff0c\u6211\u4eec\u6cdb\u6307\u7684\u6574\u4f53CPU\u4f7f\u7528\u7387\u4e3aUser Time \u548c Systime\u5360\u6bd4\u4e4b\u548c(\u4f8b\u5982tsar\u4e2dCPU util)\uff0c\u5373\uff1a<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>\u4e3a\u4e86\u4fbf\u4e8e\u5b9a\u4f4d\u95ee\u9898\uff0c\u5927\u591a\u6570\u6027\u80fd\u7edf\u8ba1\u5de5\u5177\u90fd\u5c06\u8fd94\u7c7b\u65f6\u95f4\u7247\u8fdb\u4e00\u6b65\u7ec6\u5316\u6210\u4e868\u7c7b\uff0c\u5982\u4e0b\u4e3aTOP\u5bf9CPU\u65f6\u95f4\u7247\u7684\u5206\u7c7b\u3002<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<ul>\n<li>us\uff1a\u7528\u6237\u8fdb\u7a0b\u7a7a\u95f4\u4e2d\u672a\u6539\u53d8\u8fc7\u4f18\u5148\u7ea7\u7684\u8fdb\u7a0b\u5360\u7528CPU\u767e\u5206\u6bd4<\/li>\n<li>sy\uff1a\u5185\u6838\u7a7a\u95f4\u5360\u7528CPU\u767e\u5206\u6bd4<\/li>\n<li>ni\uff1a\u7528\u6237\u8fdb\u7a0b\u7a7a\u95f4\u5185\u6539\u53d8\u8fc7\u4f18\u5148\u7ea7\u7684\u8fdb\u7a0b\u5360\u7528CPU\u767e\u5206\u6bd4<\/li>\n<li>id\uff1a\u7a7a\u95f2\u65f6\u95f4\u767e\u5206\u6bd4<\/li>\n<li>wa\uff1a\u7a7a\u95f2&amp;\u7b49\u5f85I\/O\u7684\u65f6\u95f4\u767e\u5206\u6bd4<\/li>\n<li>hi\uff1a\u786c\u4e2d\u65ad\u65f6\u95f4\u767e\u5206\u6bd4<\/li>\n<li>si\uff1a\u8f6f\u4e2d\u65ad\u65f6\u95f4\u767e\u5206\u6bd4<\/li>\n<li>st\uff1a\u865a\u62df\u5316\u65f6\u88ab\u5176\u4f59VM\u7a83\u53d6\u65f6\u95f4\u767e\u5206\u6bd4<\/li>\n<\/ul>\n<p>\u8fd98\u7c7b\u5206\u7247\u4e2d\uff0c\u9664wa\u548cid\u5916\uff0c\u5176\u4f59\u5206\u7247CPU\u90fd\u5904\u4e8e\u5de5\u4f5c\u6001\u3002<\/p>\n<p><strong>\u4e8c \u8d44\u6e90&amp;\u74f6\u9888\u5206\u6790<\/strong><\/p>\n<p>\u4ece\u4e0a\u6587\u6211\u4eec\u4e86\u89e3\u5230\uff0cLoad Average\u548cCPU\u4f7f\u7528\u7387\u53ef\u88ab\u7ec6\u5206\u4e3a\u4e0d\u540c\u7684\u5b50\u57df\u6307\u6807\uff0c\u6307\u5411\u4e0d\u540c\u7684\u8d44\u6e90\u74f6\u9888\u3002\u603b\u4f53\u6765\u8bf4\uff0c\u6307\u6807\u4e0e\u8d44\u6e90\u74f6\u9888\u7684\u5bf9\u5e94\u5173\u7cfb\u57fa\u672c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p><strong>Load\u9ad8 &amp; CPU\u9ad8<\/strong><\/p>\n<p>\u8fd9\u662f\u6211\u4eec\u6700\u5e38\u9047\u5230\u7684\u4e00\u7c7b\u60c5\u51b5\uff0c\u5373load\u4e0a\u6da8\u662fCPU\u8d1f\u8f7d\u4e0a\u5347\u5bfc\u81f4\u3002\u6839\u636eCPU\u5177\u4f53\u8d44\u6e90\u5206\u914d\u8868\u73b0\uff0c\u53ef\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b\uff1a<\/p>\n<p><strong>CPU sys\u9ad8<\/strong><\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5CPU\u4e3b\u8981\u5f00\u9500\u5728\u4e8e\u7cfb\u7edf\u5185\u6838\uff0c\u53ef\u8fdb\u4e00\u6b65\u67e5\u770b\u4e0a\u4e0b\u6587\u5207\u6362\u60c5\u51b5\u3002<\/p>\n<ul>\n<li>\u5982\u679c\u975e\u81ea\u613f\u4e0a\u4e0b\u6587\u5207\u6362\u8f83\u591a\uff0c\u8bf4\u660eCPU\u62a2\u5360\u8f83\u4e3a\u6fc0\u70c8\uff0c\u5927\u91cf\u8fdb\u7a0b\u7531\u4e8e\u65f6\u95f4\u7247\u5df2\u5230\u7b49\u539f\u56e0\uff0c\u88ab\u7cfb\u7edf\u5f3a\u5236\u8c03\u5ea6\uff0c\u8fdb\u800c\u53d1\u751f\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u3002<\/li>\n<li>\u5982\u679c\u81ea\u613f\u4e0a\u4e0b\u6587\u5207\u6362\u8f83\u591a\uff0c\u8bf4\u660e\u53ef\u80fd\u5b58\u5728I\/O\u3001\u5185\u5b58\u7b49\u7cfb\u7edf\u8d44\u6e90\u74f6\u9888\uff0c\u5927\u91cf\u8fdb\u7a0b\u65e0\u6cd5\u83b7\u53d6\u6240\u9700\u8d44\u6e90\uff0c\u5bfc\u81f4\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u3002<\/li>\n<\/ul>\n<p><strong>CPU si\u9ad8<\/strong><\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5CPU\u5927\u91cf\u6d88\u8017\u5728\u8f6f\u4e2d\u65ad\uff0c\u53ef\u8fdb\u4e00\u6b65\u67e5\u770b\u8f6f\u4e2d\u65ad\u7c7b\u578b\u3002\u4e00\u822c\u800c\u8a00\uff0c\u7f51\u7edcI\/O\u6216\u8005\u7ebf\u7a0b\u8c03\u5ea6\u5f15\u8d77\u8f6f\u4e2d\u65ad\u6700\u4e3a\u5e38\u89c1\uff1a<\/p>\n<ul>\n<li>NET_TX &amp; NET_RX\u3002NET_TX\u662f\u53d1\u9001\u7f51\u7edc\u6570\u636e\u5305\u7684\u8f6f\u4e2d\u65ad\uff0cNET_RX\u662f\u63a5\u6536\u7f51\u7edc\u6570\u636e\u5305\u7684\u8f6f\u4e2d\u65ad\uff0c\u8fd9\u4e24\u79cd\u7c7b\u578b\u7684\u8f6f\u4e2d\u65ad\u8f83\u9ad8\u65f6\uff0c\u7cfb\u7edf\u5b58\u5728\u7f51\u7edcI\/O\u74f6\u9888\u53ef\u80fd\u6027\u8f83\u5927\u3002<\/li>\n<li>SCHED\u3002SCHED\u4e3a\u8fdb\u7a0b\u8c03\u5ea6\u4ee5\u53ca\u8d1f\u8f7d\u5747\u8861\u5f15\u8d77\u7684\u4e2d\u65ad\uff0c\u8fd9\u79cd\u4e2d\u65ad\u51fa\u73b0\u8f83\u591a\u65f6\uff0c\u7cfb\u7edf\u5b58\u5728\u8f83\u591a\u8fdb\u7a0b\u5207\u6362\uff0c\u4e00\u822c\u4e0e\u975e\u81ea\u613f\u4e0a\u4e0b\u6587\u5207\u6362\u9ad8\u540c\u65f6\u51fa\u73b0\uff0c\u53ef\u80fd\u5b58\u5728CPU\u74f6\u9888\u3002<\/li>\n<\/ul>\n<p><strong>CPU us\u9ad8<\/strong><\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5\u8bf4\u660e\u8d44\u6e90\u4e3b\u8981\u6d88\u8017\u5728\u5e94\u7528\u8fdb\u7a0b\uff0c\u53ef\u80fd\u5f15\u53d1\u7684\u539f\u56e0\u6709\u4ee5\u4e0b\u51e0\u7c7b\uff1a<\/p>\n<ul>\n<li>\u6b7b\u5faa\u73af\u6216\u4ee3\u7801\u4e2d\u5b58\u5728CPU\u5bc6\u96c6\u8ba1\u7b97\u3002\u8fd9\u79cd\u60c5\u51b5\u591a\u6838CPU us\u4f1a\u540c\u65f6\u4e0a\u6da8\u3002<\/li>\n<li>\u5185\u5b58\u95ee\u9898\uff0c\u5bfc\u81f4\u5927\u91cfFULLGC\uff0c\u963b\u585e\u7ebf\u7a0b\u3002\u8fd9\u79cd\u60c5\u51b5\u4e00\u822c\u53ea\u6709\u4e00\u6838CPU us\u4e0a\u6da8\u3002<\/li>\n<li>\u8d44\u6e90\u7b49\u5f85\u9020\u6210\u7ebf\u7a0b\u6c60\u6ee1\uff0c\u8fde\u5e26\u5f15\u53d1CPU\u4e0a\u6da8\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7ebf\u7a0b\u6c60\u6ee1\u7b49\u5f02\u5e38\u4f1a\u540c\u65f6\u51fa\u73b0\u3002<\/li>\n<\/ul>\n<p><strong>Load\u9ad8 &amp; CPU\u4f4e<\/strong><\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5\u51fa\u73b0\u7684\u6839\u672c\u539f\u56e0\u5728\u4e8e\u4e0d\u53ef\u4e2d\u65ad\u7761\u7720\u6001(TASK_UNINTERRUPTIBLE)\u8fdb\u7a0b\u6570\u8f83\u591a\uff0c\u5373CPU\u8d1f\u8f7d\u4e0d\u9ad8\uff0c\u4f46I\/O\u8d1f\u8f7d\u8f83\u9ad8\u3002\u53ef\u8fdb\u4e00\u6b65\u5b9a\u4f4d\u662f\u78c1\u76d8I\/O\u8fd8\u662f\u7f51\u7edcI\/O\u5bfc\u81f4\u3002<\/p>\n<p><strong>\u4e09 \u6392\u67e5\u7b56\u7565<\/strong><\/p>\n<p>\u5229\u7528\u73b0\u6709\u5e38\u7528\u7684\u5de5\u5177\uff0c\u6211\u4eec\u5e38\u7528\u7684\u6392\u67e5\u7b56\u7565\u57fa\u672c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p>\u4ece\u95ee\u9898\u53d1\u73b0\u5230\u6700\u7ec8\u5b9a\u4f4d\uff0c\u57fa\u672c\u53ef\u5206\u4e3a\u56db\u4e2a\u9636\u6bb5\uff1a<\/p>\n<p><strong>\u8d44\u6e90\u74f6\u9888\u5b9a\u4f4d<\/strong><\/p>\n<p>\u8fd9\u4e00\u9636\u6bb5\u901a\u8fc7\u5168\u5c40\u6027\u80fd\u68c0\u6d4b\u5de5\u5177\uff0c\u521d\u6b65\u5b9a\u4f4d\u8d44\u6e90\u6d88\u8017\u5f02\u5e38\u4f4d\u70b9\u3002<\/p>\n<p>\u5e38\u7528\u7684\u5de5\u5177\u6709\uff1a<\/p>\n<ul>\n<li>top\u3001vmstat\u3001tsar(\u5386\u53f2)\n<ul>\n<li>\u4e2d\u65ad\uff1a\/proc\/softirqs\u3001\/proc\/interrupts<\/li>\n<li>I\/O\uff1aiostat\u3001dstat<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>\u70ed\u70b9\u8fdb\u7a0b\u5b9a\u4f4d<\/strong><\/p>\n<p>\u5b9a\u4f4d\u5230\u8d44\u6e90\u74f6\u9888\u540e\uff0c\u53ef\u8fdb\u4e00\u6b65\u5206\u6790\u5177\u4f53\u8fdb\u7a0b\u8d44\u6e90\u6d88\u8017\u60c5\u51b5\uff0c\u627e\u5230\u70ed\u70b9\u8fdb\u7a0b\u3002<\/p>\n<p>\u5e38\u7528\u5de5\u5177\u6709\uff1a<\/p>\n<ul>\n<li>\u4e0a\u4e0b\u6587\u5207\u6362\uff1apidstat -w<\/li>\n<li>CPU\uff1apidstat -u<\/li>\n<li>I\/O\uff1aiotop\u3001pidstat -d<\/li>\n<li>\u50f5\u5c38\u8fdb\u7a0b\uff1aps<\/li>\n<\/ul>\n<p><strong>\u7ebf\u7a0b&amp;\u8fdb\u7a0b\u5185\u90e8\u8d44\u6e90\u5b9a\u4f4d<\/strong><\/p>\n<p>\u627e\u5230\u5177\u4f53\u8fdb\u7a0b\u540e\uff0c\u53ef\u7ec6\u5316\u5206\u6790\u8fdb\u7a0b\u5185\u90e8\u8d44\u6e90\u5f00\u9500\u60c5\u51b5\u3002<\/p>\n<p>\u5e38\u7528\u5de5\u5177\u6709\uff1a<\/p>\n<ul>\n<li>\u4e0a\u4e0b\u6587\u5207\u6362\uff1apidstat -w -p [pid]<\/li>\n<li>CPU\uff1apidstat -u -p [pid]<\/li>\n<li>I\/O: lsof<\/li>\n<\/ul>\n<p><strong>\u70ed\u70b9\u4e8b\u4ef6&amp;\u65b9\u6cd5\u5206\u6790<\/strong><\/p>\n<p>\u83b7\u53d6\u5230\u70ed\u70b9\u7ebf\u7a0b\u540e\uff0c\u6211\u4eec\u53ef\u7528trace\u6216\u8005dump\u5de5\u5177\uff0c\u5c06\u7ebf\u7a0b\u53cd\u5411\u5173\u8054\uff0c\u5c06\u95ee\u9898\u8303\u56f4\u5b9a\u4f4d\u5230\u5177\u4f53\u65b9\u6cd5&amp;\u5806\u6808\u3002<\/p>\n<p>\u5e38\u7528\u7684\u5de5\u5177\u6709\uff1a<\/p>\n<ul>\n<li>perf\uff1aLinux\u81ea\u5e26\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u529f\u80fd\u7c7b\u4f3chotmethod\uff0c\u57fa\u4e8e\u4e8b\u4ef6\u91c7\u6837\u539f\u7406\uff0c\u4ee5\u6027\u80fd\u4e8b\u4ef6\u4e3a\u57fa\u7840\uff0c\u652f\u6301\u9488\u5bf9\u5904\u7406\u5668\u76f8\u5173\u6027\u80fd\u6307\u6807\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u76f8\u5173\u6027\u80fd\u6307\u6807\u7684\u6027\u80fd\u5256\u6790\u3002<\/li>\n<li>jstack\n<ul>\n<li>\u7ed3\u5408ps -Lp\u6216\u8005pidstat -p\u4e00\u8d77\u4f7f\u7528\uff0c\u53ef\u521d\u6b65\u5b9a\u4f4d\u70ed\u70b9\u7ebf\u7a0b\u3002<\/li>\n<li>\u7ed3\u5408zprofile-threaddump\u4e00\u8d77\u4f7f\u7528\uff0c\u53ef\u7edf\u8ba1\u7ebf\u7a0b\u5206\u5e03\u3001\u7b49\u9501\u60c5\u51b5\uff0c\u5e38\u7528\u4e0e\u7ebf\u7a0b\u6570\u589e\u52a0\u5206\u6790\u3002<\/li>\n<\/ul>\n<\/li>\n<li>strace\uff1a\u8ddf\u8e2a\u8fdb\u7a0b\u6267\u884c\u65f6\u7684\u7cfb\u7edf\u8c03\u7528\u548c\u6240\u63a5\u6536\u7684\u4fe1\u53f7\u3002<\/li>\n<li>tcpdump\uff1a\u6293\u5305\u5206\u6790\uff0c\u5e38\u7528\u4e8e\u7f51\u7edcI\/O\u74f6\u9888\u5b9a\u4f4d\u3002<\/li>\n<\/ul>\n<p>\u76f8\u5173\u9605\u8bfb<\/p>\n<p>[1]Linux Load Averages: Solving the Mystery<\/p>\n<p>http:\/\/www.brendangregg.com\/blog\/2017-08-08\/linux-load-averages.html<\/p>\n<p>[2]What exactly is a load average?<\/p>\n<p>&nbsp;<\/p>\n<p>http:\/\/linuxtechsupport.blogspot.com\/2008\/10\/what-exactly-is-load-average.html<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[[344475]] \u538b\u6d4b\u65f6\u6216\u591a\u6216\u5c11\u90fd\u6536\u5230\u8fc7CPU\u6216\u8005Load\u9ad8\u7684\u544a\u8b66\uff0c\u5982\u679c\u662f\u5355\u673a\u5076\u53d1\u6027\u7684\uff0c\u7ecf\u5e38\u4f1a\u8ba4\u4e3a\u662f\u201c\u5bbf\u4e3b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":348640,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-348639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/348639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=348639"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/348639\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/348640"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=348639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=348639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=348639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}