{"id":10006433,"date":"2022-09-08T08:13:44","date_gmt":"2022-09-08T00:13:44","guid":{"rendered":"https:\/\/ityet.com\/?p=10006433"},"modified":"2022-09-08T08:13:44","modified_gmt":"2022-09-08T00:13:44","slug":"%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e5%bf%85%e5%a4%87-%e7%81%ab%e7%84%b0%e5%9b%be","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006433","title":{"rendered":"\u6027\u80fd\u4f18\u5316\u5fc5\u5907\u2014\u2014\u706b\u7130\u56fe"},"content":{"rendered":"

\u5f15\u8a00<\/h3>\n

\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u706b\u7130\u56fe\u53ca\u4f7f\u7528\u6280\u5de7\uff0c\u5b66\u4e60\u5982\u4f55\u4f7f\u7528\u706b\u7130\u56fe\u5feb\u901f\u5b9a\u4f4d\u8f6f\u4ef6\u7684\u6027\u80fd\u5361\u70b9\u3002
\u7ed3\u5408\u6700\u4f73\u5b9e\u8df5\u5b9e\u6218\u6848\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u52a0\u6df1\u523b\u7684\u7406\u89e3\u706b\u7130\u56fe\u6784\u9020\u53ca\u539f\u7406\uff0c\u7406\u89e3 CPU \u8017\u65f6\uff0c\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\u3002<\/p>\n

\u80cc\u666f<\/h3>\n

\u5f53\u524d\u73b0\u72b6<\/h4>\n

\u5047\u8bbe\u6ca1\u6709\u706b\u7130\u56fe\uff0c\u4f60\u662f\u600e\u4e48\u8c03\u4f18\u7a0b\u5e8f\u4ee3\u7801\u7684\u5462\uff1f\u8ba9\u6211\u4eec\u6765\u634b\u4e00\u4e0b\u3002<\/p>\n

1. \u529f\u80fd\u5f00\u5173\u6cd5<\/h5>\n

\u60f3\u5f53\u5e74\u6211\u521a\u5de5\u4f5c\uff0c\u8fd8\u662f\u4e00\u4e2a\u6280\u672f\u5c0f\u767d\u65f6\uff0c\u6392\u67e5\u95ee\u9898\u53ea\u80fd\u9760\u7384\u5b66\uff0c\u5927\u81f4\u80fd\u731c\u51fa\u95ee\u9898\u53ef\u80fd\u662f\u7531\u67d0\u4e2a\u529f\u80fd\u4ee3\u7801\u5bfc\u81f4\u7684\uff0c\u6b64\u65f6\u7684\u6392\u67e5\u624b\u6bb5\u5c31\u662f\u5220\u9664\u591a\u4f59\u7684\u529f\u80fd\u4ee3\u7801\uff0c\u7136\u540e\u518d\u8fd0\u884c\u67e5\u770b CPU \u6d88\u8017\uff0c\u786e\u5b9a\u95ee\u9898\u3002\uff08\u81f3\u4eca\u6211\u5de5\u4f5c\u65f6\u8fd8\u4f1a\u53d1\u73b0\u4e00\u4e9b\u8001\u4eba\u4f7f\u7528\u5982\u6b64\u65b9\u6cd5\u8c03\u8bd5\u6027\u80fd\u3002\uff09<\/p>\n

public void demo() {\n\n    if (\u5173\u95ed1) {\n        \/\/ \u529f\u80fd1\n        handle1();\n    }\n\n    if (\u5173\u95ed2) {\n        \/\/ \u529f\u80fd2\n        handle2();\n    }\n\n    if (\u6253\u5f003) {\n        \/\/ \u529f\u80fd3\n        handle3();\n    }\n\n    \/\/ \u529f\u80fd4\n    handle4();\n}<\/code><\/pre>\n
\u6b64\u6cd5\u5168\u9760\u201c\u7ecf\u9a8c\u201d\u548c\u201c\u8fd0\u6c14\u201d\uff0c\u800c\u4e14\u6539\u52a8\u4e86\u4ee3\u7801\u7ed3\u6784\uff0c\u5047\u8bbe\u8fd9\u662f\u4e00\u4e2a\u5df2\u7ecf\u901a\u8fc7\u6d4b\u8bd5\u7684\u96c6\u6210\u533a\u4ee3\u7801\uff0c\u6b64\u65f6\u9700\u8981\u4fee\u6539\u4ee3\u7801\u529f\u80fd\u6765\u8c03\u8bd5\u7a0b\u5e8f\u662f\u975e\u5e38\u5371\u9669\u7684\u4e00\u4ef6\u4e8b\uff0c\u5f53\u7136\u6709 Git \u4ed3\u5e93\u53ef\u4ee5\u201c\u4e00\u952e\u8fd8\u539f\u201d\uff0c\u4f46\u662f\uff0c\u662f\u4eba\u64cd\u4f5c\uff0c\u603b\u5f52\u4f1a\u6709\u5931\u624b\u7684\u65f6\u5019\uff0c\u4e14\u5b9a\u4f4d\u6548\u7387\u592a\u4f4e<\/p>\n
2. StopWatch \u57cb\u70b9\u6cd5<\/h5>\n
\u5f53\u7a0b\u5e8f\u51fa\u73b0\u6027\u80fd\u95ee\u9898\u65f6\uff0c\u4e14\u4e0d\u786e\u5b9a\u662f\u54ea\u4e00\u6bb5\u4ee3\u7801\u5bfc\u81f4\u8017\u65f6\uff0c\u53ef\u4ee5\u501f\u52a9\u65b9\u6cd5\u8017\u65f6\u6765\u5224\u65ad\uff0c\u6b64\u65f6\u6211\u4eec\u53ea\u8981\u5728\u8c03\u7528\u65b9\u6cd5\u524d\u540e\u8ffd\u52a0\u6267\u884c\u6240\u9700\u8017\u65f6\u65e5\u5fd7\uff0c\u5373\u53ef\u5224\u5b9a\u5230\u5e95\u662f\u54ea\u4e2a\u65b9\u6cd5\u6700\u8017\u65f6\u3002<\/p>\n
public void demo() {\n    Stopwatch stopwatch = Stopwatch.createStarted();\n    handle1();\n    log.info("method handle1 cost: {} ms", \n             stopwatch.elapsed(TimeUnit.MILLISECONDS));\n    \n    handle2();\n    log.info("method handle2 cost: {} ms", \n             stopwatch.elapsed(TimeUnit.MILLISECONDS));\n    \n    handle3();\n    log.info("method handle3 cost: {} ms", \n             stopwatch.elapsed(TimeUnit.MILLISECONDS));\n    \n    handle4();\n    log.info("method handle4 cost: {} ms", \n             stopwatch.stop().elapsed(TimeUnit.MILLISECONDS));\n}<\/code><\/pre>\n
\u6b64\u6cd5\u8f83\u4e0a\u4e00\u4e2a\u65b9\u6cd5\u7684\u4f18\u52bf\u662f\uff0c\u4e0d\u6539\u53d8\u4ee3\u7801\u7684\u903b\u8f91\u60c5\u51b5\u4e0b\uff0c\u53ea\u662f\u589e\u5f3a\u4e86\u4e00\u4e9b\u89c2\u6d4b\u70b9\u4f4d\uff0c\u7531\u65b9\u6cd5\u7684\u8017\u65f6\u6765\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\u3002\u4f46\u662f\uff0c\u5047\u8bbe\u65b9\u6cd5\u7684\u5904\u7406\u8c03\u7528\u6808\u5f88\u6df1\uff0c\u5c31\u4e0d\u5f97\u4e0d\u5728\u5b50\u65b9\u6cd5\u4e2d\u518d\u6b21\u57cb\u70b9\uff0c\u6b64\u65f6\u5224\u5b9a\u6d41\u7a0b\u5373\u4e3a\uff1a\u57cb\u70b9 -> \u53d1\u7248 -> \u5b9a\u4f4d -> \u57cb\u70b9 -> \u53d1\u7248 -> \u5b9a\u4f4d -> …….\u4e14\u672c\u8d28\u4e0a\u4e5f\u662f\u6539\u4e86\u4ee3\u7801\uff0c\u5c31\u6709\u51fa\u9519\u7684\u53ef\u80fd\u3002 \u5fc3\u7d2f\uff0c\u4e0d\u9ad8\u6548\uff01<\/p>\n
3. TOP \u547d\u4ee4\u5b9a\u4f4d\u70ed\u7ebf\u7a0b<\/h5>\n
\u4e00\u822c\u4f01\u4e1a\u7684\u8f6f\u4ef6\u670d\u52a1\u90fd\u662f\u90e8\u7f72\u5728 Linux \u64cd\u4f5c\u7cfb\u7edf\u4e0a\uff0c\u6709\u7ecf\u9a8c\u7684\u8001\u624b\u6392\u67e5\u6027\u80fd\u6700\u65b9\u4fbf\u7684\u529e\u6cd5\u5c31\u662f top \u5b9a\u4f4d\u3002<\/p>\n
top -p pid -H<\/code><\/pre>\n
\"image.png\"
\u660e\u663e\u770b\u5230\uff0cpid 103  \u6d88\u8017\u4e86 40%\u7684 CPU, \u627e\u5230\u5bf9\u5e94\u7684 stack \u7ebf\u7a0b\u4fe1\u606f\u5982\u4e0b\uff08\u5ffd\u7565\u67e5\u627e\u529e\u6cd5\uff0c\u6211\u5047\u8bbe\u4f60\u5df2\u7ecf\u4f1a\u4e86\uff1a\uff09\uff09\uff1a
\"image.png\"
\u6b64\u65f6\u53ef\u4ee5\u5f97\u51fa\u7ed3\u8bba\uff0c\u5f53\u524d\u6700\u8017 CPU \u7684\u7ebf\u7a0b\u662f\u5199\u5165\u78c1\u76d8\u6587\u4ef6\uff0c\u8ffd\u67e5\u4ee3\u7801\u6700\u7ec8\u4f1a\u5b9a\u4f4d\u5230\u662f\u56e0\u4e3a\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u6253\u4e86\u5927\u91cf\u7684 INFO \u65e5\u5fd7\uff0c\u5bfc\u81f4\u78c1\u76d8\u5199\u5165\u6210\u4e3a\u74f6\u9888\u3002<\/p>\n
\u603b\u7ed3\uff1aTOP \u547d\u4ee4\u5bf9\u4e8e\u627e CPU \u6027\u80fd\u74f6\u9888\u65f6\u5f88\u6709\u6548\u7684\uff0c\u4f46\u662f\u5b58\u5728\u5982\u4e0b\u51e0\u4e2a\u95ee\u9898\uff1a<\/p>\n