{"id":2963,"date":"2019-03-22T20:07:35","date_gmt":"2019-03-22T12:07:35","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=2963"},"modified":"2019-03-25T11:49:41","modified_gmt":"2019-03-25T03:49:41","slug":"%e5%a6%82%e4%bd%95%e8%af%bb%e6%87%82%e7%81%ab%e7%84%b0%e5%9b%be%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/2963","title":{"rendered":"\u5982\u4f55\u8bfb\u61c2\u706b\u7130\u56fe\uff1f"},"content":{"rendered":"
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\u4f5c\u8005\uff1a \u962e\u4e00\u5cf0<\/a><\/div>\n<\/div>\n
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\u65e5\u671f\uff1a\u00a02017\u5e749\u670826\u65e5<\/abbr><\/a><\/p>\n<\/div>\n

<\/div>\n
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\u8f6f\u4ef6\u7684\u6027\u80fd\u5206\u6790\uff0c\u5f80\u5f80\u9700\u8981\u67e5\u770b CPU \u8017\u65f6\uff0c\u4e86\u89e3\u74f6\u9888\u5728\u54ea\u91cc\u3002<\/p>\n

\u706b\u7130\u56fe<\/a>\uff08flame graph\uff09\u662f\u6027\u80fd\u5206\u6790\u7684\u5229\u5668\u3002\u672c\u6587\u4ecb\u7ecd\u5b83\u7684\u57fa\u672c\u7528\u6cd5\u3002<\/p>\n

\"\"<\/p>\n

\u4e00\u3001perf \u547d\u4ee4<\/h2>\n

\u8ba9\u6211\u4eec\u4ece perf \u547d\u4ee4\uff08performance \u7684\u7f29\u5199\uff09\u8bb2\u8d77\uff0c\u5b83\u662f Linux \u7cfb\u7edf\u539f\u751f\u63d0\u4f9b\u7684\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u4f1a\u8fd4\u56de CPU \u6b63\u5728\u6267\u884c\u7684\u51fd\u6570\u540d\u4ee5\u53ca\u8c03\u7528\u6808\uff08stack\uff09\u3002<\/p>\n

\u901a\u5e38\uff0c\u5b83\u7684\u6267\u884c\u9891\u7387\u662f 99Hz\uff08\u6bcf\u79d299\u6b21\uff09\uff0c\u5982\u679c99\u6b21\u90fd\u8fd4\u56de\u540c\u4e00\u4e2a\u51fd\u6570\u540d\uff0c\u90a3\u5c31\u8bf4\u660e CPU \u8fd9\u4e00\u79d2\u949f\u90fd\u5728\u6267\u884c\u540c\u4e00\u4e2a\u51fd\u6570\uff0c\u53ef\u80fd\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<\/p>\n

$ sudo perf record -F 99 -p 13204 -g -- sleep 30<\/pre>\n<\/div>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0cperf record<\/code>\u8868\u793a\u8bb0\u5f55\uff0c-F 99<\/code>\u8868\u793a\u6bcf\u79d299\u6b21\uff0c-p 13204<\/code>\u662f\u8fdb\u7a0b\u53f7\uff0c\u5373\u5bf9\u54ea\u4e2a\u8fdb\u7a0b\u8fdb\u884c\u5206\u6790\uff0c-g<\/code>\u8868\u793a\u8bb0\u5f55\u8c03\u7528\u6808\uff0csleep 30<\/code>\u5219\u662f\u6301\u7eed30\u79d2\u3002<\/p>\n
\n
\u8fd0\u884c\u540e\u4f1a\u4ea7\u751f\u4e00\u4e2a\u5e9e\u5927\u7684\u6587\u672c\u6587\u4ef6\u3002\u5982\u679c\u4e00\u53f0\u670d\u52a1\u5668\u670916\u4e2a CPU\uff0c\u6bcf\u79d2\u62bd\u683799\u6b21\uff0c\u6301\u7eed30\u79d2\uff0c\u5c31\u5f97\u5230 47,520 \u4e2a\u8c03\u7528\u6808\uff0c\u957f\u8fbe\u51e0\u5341\u4e07\u751a\u81f3\u4e0a\u767e\u4e07\u884c\u3002<\/p>\n
\u4e3a\u4e86\u4fbf\u4e8e\u9605\u8bfb\uff0cperf record<\/code>\u547d\u4ee4\u53ef\u4ee5\u7edf\u8ba1\u6bcf\u4e2a\u8c03\u7528\u6808\u51fa\u73b0\u7684\u767e\u5206\u6bd4\uff0c\u7136\u540e\u4ece\u9ad8\u5230\u4f4e\u6392\u5217\u3002<\/p>\n
$ sudo perf report -n --stdio<\/pre>\n<\/div>\n
\"\"<\/p>\n
\n
\u8fd9\u4e2a\u7ed3\u679c\u8fd8\u662f\u4e0d\u6613\u8bfb\uff0c\u6240\u4ee5\u624d\u6709\u4e86\u706b\u7130\u56fe\u3002<\/p>\n
\u4e8c\u3001\u706b\u7130\u56fe\u7684\u542b\u4e49<\/h2>\n
\u706b\u7130\u56fe\u662f\u57fa\u4e8e perf \u7ed3\u679c\u4ea7\u751f\u7684\u00a0SVG \u56fe\u7247<\/a>\uff0c\u7528\u6765\u5c55\u793a CPU \u7684\u8c03\u7528\u6808\u3002<\/p>\n
\"\"<\/a><\/p>\n
y \u8f74\u8868\u793a\u8c03\u7528\u6808\uff0c\u6bcf\u4e00\u5c42\u90fd\u662f\u4e00\u4e2a\u51fd\u6570\u3002\u8c03\u7528\u6808\u8d8a\u6df1\uff0c\u706b\u7130\u5c31\u8d8a\u9ad8\uff0c\u9876\u90e8\u5c31\u662f\u6b63\u5728\u6267\u884c\u7684\u51fd\u6570\uff0c\u4e0b\u65b9\u90fd\u662f\u5b83\u7684\u7236\u51fd\u6570\u3002<\/p>\n
x \u8f74\u8868\u793a\u62bd\u6837\u6570\uff0c\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u5728 x \u8f74\u5360\u636e\u7684\u5bbd\u5ea6\u8d8a\u5bbd\uff0c\u5c31\u8868\u793a\u5b83\u88ab\u62bd\u5230\u7684\u6b21\u6570\u591a\uff0c\u5373\u6267\u884c\u7684\u65f6\u95f4\u957f\u3002\u6ce8\u610f\uff0cx \u8f74\u4e0d\u4ee3\u8868\u65f6\u95f4\uff0c\u800c\u662f\u6240\u6709\u7684\u8c03\u7528\u6808\u5408\u5e76\u540e\uff0c\u6309\u5b57\u6bcd\u987a\u5e8f\u6392\u5217\u7684\u3002<\/p>\n
\u706b\u7130\u56fe\u5c31\u662f\u770b\u9876\u5c42\u7684\u54ea\u4e2a\u51fd\u6570\u5360\u636e\u7684\u5bbd\u5ea6\u6700\u5927\u3002\u53ea\u8981\u6709”\u5e73\u9876”\uff08plateaus\uff09\uff0c\u5c31\u8868\u793a\u8be5\u51fd\u6570\u53ef\u80fd\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<\/strong><\/p>\n
\u989c\u8272\u6ca1\u6709\u7279\u6b8a\u542b\u4e49\uff0c\u56e0\u4e3a\u706b\u7130\u56fe\u8868\u793a\u7684\u662f CPU \u7684\u7e41\u5fd9\u7a0b\u5ea6\uff0c\u6240\u4ee5\u4e00\u822c\u9009\u62e9\u6696\u8272\u8c03\u3002<\/p>\n
\u4e09\u3001\u4e92\u52a8\u6027<\/h2>\n
\u706b\u7130\u56fe\u662f\u00a0SVG \u56fe\u7247<\/a>\uff0c\u53ef\u4ee5\u4e0e\u7528\u6237\u4e92\u52a8\u3002<\/p>\n
\uff081\uff09\u9f20\u6807\u60ac\u6d6e<\/strong><\/p>\n
\u706b\u7130\u7684\u6bcf\u4e00\u5c42\u90fd\u4f1a\u6807\u6ce8\u51fd\u6570\u540d\uff0c\u9f20\u6807\u60ac\u6d6e\u65f6\u4f1a\u663e\u793a\u5b8c\u6574\u7684\u51fd\u6570\u540d\u3001\u62bd\u6837\u62bd\u4e2d\u7684\u6b21\u6570\u3001\u5360\u636e\u603b\u62bd\u6837\u6b21\u6570\u7684\u767e\u5206\u6bd4\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n
mysqld'JOIN::exec (272,959 samples, 78.34 percent)<\/pre>\n<\/div>\n<\/article>\n<\/div>\n
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\uff082\uff09\u70b9\u51fb\u653e\u5927<\/strong><\/p>\n
\u5728\u67d0\u4e00\u5c42\u70b9\u51fb\uff0c\u706b\u7130\u56fe\u4f1a\u6c34\u5e73\u653e\u5927\uff0c\u8be5\u5c42\u4f1a\u5360\u636e\u6240\u6709\u5bbd\u5ea6\uff0c\u663e\u793a\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n
\"\"<\/p>\n
\u5de6\u4e0a\u89d2\u4f1a\u540c\u65f6\u663e\u793a”Reset Zoom”\uff0c\u70b9\u51fb\u8be5\u94fe\u63a5\uff0c\u56fe\u7247\u5c31\u4f1a\u6062\u590d\u539f\u6837\u3002<\/p>\n
\uff083\uff09\u641c\u7d22<\/strong><\/p>\n
\u6309\u4e0b Ctrl + F \u4f1a\u663e\u793a\u4e00\u4e2a\u641c\u7d22\u6846\uff0c\u7528\u6237\u53ef\u4ee5\u8f93\u5165\u5173\u952e\u8bcd\u6216\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u51fd\u6570\u540d\u4f1a\u9ad8\u4eae\u663e\u793a\u3002<\/p>\n
\u56db\u3001\u706b\u7130\u56fe\u793a\u4f8b<\/h2>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5316\u7684\u706b\u7130\u56fe\u4f8b\u5b50\u3002<\/p>\n
\u9996\u5148\uff0cCPU \u62bd\u6837\u5f97\u5230\u4e86\u4e09\u4e2a\u8c03\u7528\u6808\u3002<\/p>\n
func_c \r\nfunc_b \r\nfunc_a \r\nstart_thread \r\n\r\nfunc_d \r\nfunc_a \r\nstart_thread \r\n\r\nfunc_d \r\nfunc_a \r\nstart_thread<\/pre>\n
\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0cstart_thread<\/code>\u662f\u542f\u52a8\u7ebf\u7a0b\uff0c\u8c03\u7528\u4e86func_a<\/code>\u3002\u540e\u8005\u53c8\u8c03\u7528\u4e86func_b<\/code>\u548cfunc_d<\/code>\uff0c\u800cfunc_b<\/code>\u53c8\u8c03\u7528\u4e86func_c<\/code>\u3002<\/p>\n
\u7ecf\u8fc7\u5408\u5e76\u5904\u7406\u540e\uff0c\u5f97\u5230\u4e86\u4e0b\u9762\u7684\u7ed3\u679c\uff0c\u5373\u5b58\u5728\u4e24\u4e2a\u8c03\u7528\u6808\uff0c\u7b2c\u4e00\u4e2a\u8c03\u7528\u6808\u62bd\u4e2d1\u6b21\uff0c\u7b2c\u4e8c\u4e2a\u62bd\u4e2d2\u6b21\u3002<\/p>\n
start_thread;func_a;func_b;func_c 1 \r\nstart_thread;func_a;func_d 2<\/pre>\n
\u6709\u4e86\u8fd9\u4e2a\u8c03\u7528\u6808\u7edf\u8ba1\uff0c\u706b\u7130\u56fe\u5de5\u5177<\/a>\u5c31\u80fd\u751f\u6210 SVG \u56fe\u7247\u3002<\/p>\n
\"\"<\/p>\n
\u4e0a\u9762\u56fe\u7247\u4e2d\uff0c\u6700\u9876\u5c42\u7684\u51fd\u6570g()<\/code>\u5360\u7528 CPU \u65f6\u95f4\u6700\u591a\u3002d()<\/code>\u7684\u5bbd\u5ea6\u6700\u5927\uff0c\u4f46\u662f\u5b83\u76f4\u63a5\u8017\u7528 CPU \u7684\u90e8\u5206\u5f88\u5c11\u3002b()<\/code>\u548cc()<\/code>\u6ca1\u6709\u76f4\u63a5\u6d88\u8017 CPU\u3002\u56e0\u6b64\uff0c\u5982\u679c\u8981\u8c03\u67e5\u6027\u80fd\u95ee\u9898\uff0c\u9996\u5148\u5e94\u8be5\u8c03\u67e5g()<\/code>\uff0c\u5176\u6b21\u662fi()<\/code>\u3002<\/p>\n
\u53e6\u5916\uff0c\u4ece\u56fe\u4e2d\u53ef\u77e5a()<\/code>\u6709\u4e24\u4e2a\u5206\u652fb()<\/code>\u548ch()<\/code>\uff0c\u8fd9\u8868\u660ea()<\/code>\u91cc\u9762\u53ef\u80fd\u6709\u4e00\u4e2a\u6761\u4ef6\u8bed\u53e5\uff0c\u800cb()<\/code>\u5206\u652f\u6d88\u8017\u7684 CPU \u5927\u5927\u9ad8\u4e8eh()<\/code>\u3002<\/p>\n
\u4e94\u3001\u5c40\u9650<\/h2>\n
\u4e24\u79cd\u60c5\u51b5\u4e0b\uff0c\u65e0\u6cd5\u753b\u51fa\u706b\u7130\u56fe\uff0c\u9700\u8981\u4fee\u6b63\u7cfb\u7edf\u884c\u4e3a\u3002<\/p>\n
\uff081\uff09\u8c03\u7528\u6808\u4e0d\u5b8c\u6574<\/strong><\/p>\n
\u5f53\u8c03\u7528\u6808\u8fc7\u6df1\u65f6\uff0c\u67d0\u4e9b\u7cfb\u7edf\u53ea\u8fd4\u56de\u524d\u9762\u7684\u4e00\u90e8\u5206\uff08\u6bd4\u5982\u524d10\u5c42\uff09\u3002<\/p>\n
\uff082\uff09\u51fd\u6570\u540d\u7f3a\u5931<\/strong><\/p>\n
\u6709\u4e9b\u51fd\u6570\u6ca1\u6709\u540d\u5b57\uff0c\u7f16\u8bd1\u5668\u53ea\u7528\u5185\u5b58\u5730\u5740\u6765\u8868\u793a\uff08\u6bd4\u5982\u533f\u540d\u51fd\u6570\uff09\u3002<\/p>\n
\u516d\u3001Node \u5e94\u7528\u7684\u706b\u7130\u56fe<\/h2>\n
Node \u5e94\u7528\u7684\u706b\u7130\u56fe\u5c31\u662f\u5bf9 Node \u8fdb\u7a0b\u8fdb\u884c\u6027\u80fd\u62bd\u6837\uff0c\u4e0e\u5176\u4ed6\u5e94\u7528\u7684\u64cd\u4f5c\u662f\u4e00\u6837\u7684\u3002<\/p>\n
$ perf record -F 99 -p `pgrep -n node` -g -- sleep 30<\/pre>\n
<\/code><\/pre>\n
\u8be6\u7ec6\u7684\u64cd\u4f5c\u53ef\u4ee5\u770b\u8fd9\u7bc7\u6587\u7ae0<\/a>\u3002<\/p>\n
\u4e03\u3001\u6d4f\u89c8\u5668\u7684\u706b\u7130\u56fe<\/h2>\n
Chrome \u6d4f\u89c8\u5668\u53ef\u4ee5\u751f\u6210\u9875\u9762\u811a\u672c\u7684\u706b\u7130\u56fe\uff0c\u7528\u6765\u8fdb\u884c CPU \u5206\u6790\u3002<\/p>\n
\u6253\u5f00\u5f00\u53d1\u8005\u5de5\u5177\uff0c\u5207\u6362\u5230 Performance \u9762\u677f\u3002\u7136\u540e\uff0c\u70b9\u51fb”\u5f55\u5236”\u6309\u94ae\uff0c\u5f00\u59cb\u8bb0\u5f55\u6570\u636e\u3002\u8fd9\u65f6\uff0c\u53ef\u4ee5\u5728\u9875\u9762\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u7136\u540e\u505c\u6b62”\u5f55\u5236”\u3002<\/p>\n
\u8fd9\u65f6\uff0c\u5f00\u53d1\u8005\u5de5\u5177\u4f1a\u663e\u793a\u4e00\u4e2a\u65f6\u95f4\u8f74\u3002\u5b83\u7684\u4e0b\u65b9\u5c31\u662f\u706b\u7130\u56fe\u3002<\/p>\n
\"\"<\/p>\n
\u6d4f\u89c8\u5668\u7684\u706b\u7130\u56fe\u4e0e\u6807\u51c6\u706b\u7130\u56fe\u6709\u4e24\u70b9\u5dee\u5f02\uff1a\u5b83\u662f\u5012\u7f6e\u7684\uff08\u5373\u8c03\u7528\u6808\u6700\u9876\u7aef\u7684\u51fd\u6570\u5728\u6700\u4e0b\u65b9\uff09\uff1bx \u8f74\u662f\u65f6\u95f4\u8f74\uff0c\u800c\u4e0d\u662f\u62bd\u6837\u6b21\u6570\u3002<\/p>\n
\"\"<\/p>\n
\u516b\u3001\u53c2\u8003\u94fe\u63a5<\/h2>\n