{"id":12,"date":"2024-07-19T15:27:24","date_gmt":"2024-07-19T07:27:24","guid":{"rendered":"https:\/\/v4.oracle.20241010.xyz\/wordpress\/?p=12"},"modified":"2024-07-19T15:27:24","modified_gmt":"2024-07-19T07:27:24","slug":"linux%e6%80%a7%e8%83%bd%e5%88%86%e6%9e%90%ef%bc%9aperf-cpu%e7%81%ab%e7%84%b0%e5%9b%be","status":"publish","type":"post","link":"https:\/\/v4.oracle.20241010.xyz\/?p=12","title":{"rendered":"Linux\u6027\u80fd\u5206\u6790\uff1aPerf &amp; CPU\u706b\u7130\u56fe"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u7b2c\u4e00\u6b65\uff1aperf record \u8bb0\u5f55\u91c7\u96c6\u7684\u6027\u80fd\u6570\u636e<\/h2>\n\n\n\n<p>perf record -e cpu-clock -g -p $(pgrep test_lvgl)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>-e cpu-clock<\/strong>\uff1a\u4f7f\u7528 cpu-clock \u4e8b\u4ef6\uff0c\u8be5\u4e8b\u4ef6\u6d4b\u91cf\u5728\u88ab\u5206\u6790\u7684\u8fdb\u7a0b\u4e2d\u82b1\u8d39\u7684 CPU \u65f6\u95f4<\/li>\n\n\n\n<li>-g\uff1a\u8bb0\u5f55\u8c03\u7528\u56fe\uff08\u5373\u5806\u6808\u8ddf\u8e2a\uff09<\/li>\n\n\n\n<li>-p\uff1a\u6307\u5b9a\u8981\u5206\u6790\u7684\u8fdb\u7a0bID<\/li>\n<\/ul>\n\n\n\n<p>\u7a0b\u5e8f\u8fd0\u884c\u5b8c\u4e4b\u540e\uff0cperf record\u4f1a\u751f\u6210\u4e00\u4e2a\u540d\u4e3aperf.data\u7684\u6587\u4ef6\uff0c\u5982\u679c\u4e4b\u524d\u5df2\u6709\uff0c\u90a3\u4e48\u4e4b\u524d\u7684perf.data\u6587\u4ef6\u4f1a\u88ab\u8986\u76d6\u3002<br>\u53ef\u4ee5\u6267\u884c<strong>perf report -i perf.data<\/strong>\uff0c\uff08-i \u6307\u5b9a\u8981\u67e5\u770b\u7684\u6587\u4ef6\uff09\uff0c\u6765\u67e5\u770b\u62a5\u544a\uff0c\u4f46\u975e\u5e38\u4e0d\u76f4\u89c2\uff0c\u6240\u4ee5\u9700\u8981\u706b\u7130\u56fe\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c\u4e8c\u6b65\uff1aperf script \u89e3\u6790perf.data\u6570\u636e<\/h2>\n\n\n\n<p>perf script -i perf.data &amp;&gt; perf.unfold<\/p>\n\n\n\n<p>\u5c06perf.unfold \u62f7\u8d1d\u5230\u672c\u5730\u673a\u5668\uff0c\u518d\u672c\u5730\u751f\u6210\u706b\u7130\u56fe\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c\u4e09\u6b65\uff1a\u4f7f\u7528FlameGraph\u751f\u6210\u706b\u7130\u56fe<\/h2>\n\n\n\n<p> <a href=\"https:\/\/github.com\/brendangregg\/FlameGraph\">https:\/\/github.com\/brendangregg\/FlameGraph<\/a><\/p>\n\n\n\n<p>.\/stackcollapse-perf.pl perf.unfold &amp;&gt; perf.folded<br>.\/flamegraph.pl perf.folded &gt; perf.svg<\/p>\n\n\n\n<p>\u6267\u884c&nbsp;<strong>stackcollapse-perf.pl&nbsp;<\/strong>\u5c06 perf.unfold \u4e2d\u7684\u7b26\u53f7\u8fdb\u884c\u6298\u53e0\u3002<br>\u6267\u884c&nbsp;<strong>flamegraph.pl<\/strong>&nbsp;\u751f\u6210 \u706b\u7130\u56fe\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c\u56db\u6b65\uff1a\u706b\u7130\u56fe\u5206\u6790<\/h2>\n\n\n\n<p>\u706b\u7130\u56fe\u67e5\u770b\u8bf4\u660e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>y\u8f74\u4ee3\u8868\u8c03\u7528\u6808\uff0c\u6bcf\u4e00\u5c42\u90fd\u662f\u4e00\u4e2a\u51fd\u6570\u8c03\u7528\uff0c\u6808\u8d8a\u6df1\u5219\u706b\u7130\u8d8a\u9ad8\uff0c\u8c03\u7528\u5173\u7cfb\u662f\u4ece\u4e0b\u800c\u4e0a\u7684\uff0c\u5373\u4e0b\u5c42\u51fd\u6570\u8c03\u7528\u4e86\u4e0a\u5c42\u51fd\u6570\u3002<\/li>\n\n\n\n<li>x\u8f74\u4ee3\u8868\u62bd\u6837\u6570\uff0c\u4e00\u4e2a\u51fd\u6570\u5728x\u8f74\u5360\u636e\u7684\u5bbd\u5ea6\u8d8a\u5bbd\uff0c\u5219\u8868\u793a\u5b83\u88ab\u62bd\u6837\u5230\u7684\u6b21\u6570\u4e5f\u5c31\u8d8a\u591a\uff0c\u4e5f\u5c31\u662f\u8bf4\u5b83\u6267\u884c\u7684\u65f6\u95f4\u8d8a\u957f\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u706b\u7130\u56fe\u5c31\u662f\u770b\u51fd\u6570\u5360\u636e\u7684\u5bbd\u5ea6\uff0c\u5bbd\u5ea6\u8d8a\u5927\u53ef\u80fd\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<br>\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<br>\u9f20\u6807\u653e\u5230\u4e00\u4e2a\u51fd\u6570\u4e0a\u540e\uff0c\u4f1a\u5c55\u793a\u5b8c\u6574\u7684\u51fd\u6570\u540d\uff0c\u88ab\u62bd\u6837\u4e2d\u7684\u6b21\u6570\uff0c\u5360\u603b\u62bd\u6837\u6b21\u6570\u7684\u767e\u5206\u6bd4<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u95ee\u9898<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>svg\u56fe\u51fa\u73b0unknown\u51fd\u6570<\/li>\n<\/ul>\n\n\n\n<p>perf record -e cpu-clock \u2013call-graph dwarf -p pid<\/p>\n\n\n\n<p><strong>dwarf<\/strong>&nbsp;\u662f\u4e00\u79cd\u8c03\u8bd5\u4fe1\u606f\u683c\u5f0f\uff0c\u5b83\u53ef\u4ee5\u63d0\u4f9b\u975e\u5e38\u8be6\u7ec6\u7684\u51fd\u6570\u8c03\u7528\u4fe1\u606f\u3002<\/p>\n\n\n\n<p>\u589e\u52a0<strong>\u2014call-graph dwarf<\/strong>&nbsp;\u53c2\u6570\u540erecord\u751f\u6210\u7684perf.data\u4f1a\u53d8\u5927\uff0c\u8fd9\u91cc\u8981\u6ce8\u610f\u8bbe\u5907\u7a7a\u95f4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b2c\u4e00\u6b65\uff1aperf record \u8bb0\u5f55\u91c7\u96c6\u7684\u6027\u80fd\u6570\u636e perf record -e cpu-clock -g &#8211; &hellip; <a href=\"https:\/\/v4.oracle.20241010.xyz\/?p=12\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cLinux\u6027\u80fd\u5206\u6790\uff1aPerf &amp; CPU\u706b\u7130\u56fe\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=\/wp\/v2\/posts\/12"}],"collection":[{"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12"}],"version-history":[{"count":1,"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=\/wp\/v2\/posts\/12\/revisions"}],"predecessor-version":[{"id":13,"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=\/wp\/v2\/posts\/12\/revisions\/13"}],"wp:attachment":[{"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/v4.oracle.20241010.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}