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93 lines
54 KiB
JavaScript
93 lines
54 KiB
JavaScript
import{_ as r,a as o}from"./arthas-output-svg.30f64f53.js";import{_ as l,o as t,c as d,a as e,b as n,e as a,d as i,r as c}from"./app.5024572d.js";const p={},h=e("h1",{id:"profiler",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#profiler","aria-hidden":"true"},"#"),a(" profiler")],-1),u={href:"https://arthas.aliyun.com/doc/arthas-tutorials.html?language=cn&id=command-profiler",target:"_blank",rel:"noopener noreferrer"},v=e("code",null,"profiler",-1),m=a("\u5728\u7EBF\u6559\u7A0B"),b={class:"custom-container tip"},f=e("p",{class:"custom-container-title"},"\u63D0\u793A",-1),_=a("\u4F7F\u7528"),g={href:"https://github.com/jvm-profiling-tools/async-profiler",target:"_blank",rel:"noopener noreferrer"},k=a("async-profiler"),x=a("\u751F\u6210\u706B\u7130\u56FE"),y=e("p",null,[e("code",null,"profiler"),a(" \u547D\u4EE4\u652F\u6301\u751F\u6210\u5E94\u7528\u70ED\u70B9\u7684\u706B\u7130\u56FE\u3002\u672C\u8D28\u4E0A\u662F\u901A\u8FC7\u4E0D\u65AD\u7684\u91C7\u6837\uFF0C\u7136\u540E\u628A\u6536\u96C6\u5230\u7684\u91C7\u6837\u7ED3\u679C\u751F\u6210\u706B\u7130\u56FE\u3002")],-1),C=e("p",null,[e("code",null,"profiler"),a(" \u547D\u4EE4\u57FA\u672C\u8FD0\u884C\u7ED3\u6784\u662F "),e("code",null,"profiler action [actionArg]")],-1),j=e("code",null,"profiler",-1),J=a(" \u547D\u4EE4\u7684\u683C\u5F0F\u57FA\u672C\u4E0E\u4E0A\u6E38\u9879\u76EE "),S={href:"https://github.com/async-profiler/async-profiler",target:"_blank",rel:"noopener noreferrer"},F=a("async-profiler"),G=a(" \u4FDD\u6301\u4E00\u81F4\uFF0C\u8BE6\u7EC6\u7684\u4F7F\u7528\u65B9\u5F0F\u53EF\u53C2\u8003\u4E0A\u6E38\u9879\u76EE\u7684 README\u3001Github Disscussions \u4EE5\u53CA\u5176\u4ED6\u6587\u6863\u8D44\u6599\u3002"),O=i(`<h2 id="\u53C2\u6570\u8BF4\u660E" tabindex="-1"><a class="header-anchor" href="#\u53C2\u6570\u8BF4\u660E" aria-hidden="true">#</a> \u53C2\u6570\u8BF4\u660E</h2><table><thead><tr><th style="text-align:right;">\u53C2\u6570\u540D\u79F0</th><th style="text-align:left;">\u53C2\u6570\u8BF4\u660E</th></tr></thead><tbody><tr><td style="text-align:right;"><em>action</em></td><td style="text-align:left;">\u8981\u6267\u884C\u7684\u64CD\u4F5C</td></tr><tr><td style="text-align:right;"><em>actionArg</em></td><td style="text-align:left;">\u5C5E\u6027\u540D\u6A21\u5F0F</td></tr><tr><td style="text-align:right;">[i:]</td><td style="text-align:left;">\u91C7\u6837\u95F4\u9694\uFF08\u5355\u4F4D\uFF1Ans\uFF09\uFF08\u9ED8\u8BA4\u503C\uFF1A10'000'000\uFF0C\u5373 10 ms\uFF09</td></tr><tr><td style="text-align:right;">[f:]</td><td style="text-align:left;">\u5C06\u8F93\u51FA\u8F6C\u50A8\u5230\u6307\u5B9A\u8DEF\u5F84</td></tr><tr><td style="text-align:right;">[d:]</td><td style="text-align:left;">\u8FD0\u884C\u8BC4\u6D4B\u6307\u5B9A\u79D2</td></tr><tr><td style="text-align:right;">[e:]</td><td style="text-align:left;">\u8981\u8DDF\u8E2A\u54EA\u4E2A\u4E8B\u4EF6\uFF08cpu, alloc, lock, cache-misses \u7B49\uFF09\uFF0C\u9ED8\u8BA4\u662F cpu</td></tr></tbody></table><h2 id="\u542F\u52A8-profiler" tabindex="-1"><a class="header-anchor" href="#\u542F\u52A8-profiler" aria-hidden="true">#</a> \u542F\u52A8 profiler</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ profiler start
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Started [cpu] profiling
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><div class="custom-container tip"><p class="custom-container-title">\u63D0\u793A</p><p>\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0C\u751F\u6210\u7684\u662F cpu \u7684\u706B\u7130\u56FE\uFF0C\u5373 event \u4E3A<code>cpu</code>\u3002\u53EF\u4EE5\u7528<code>--event</code>\u53C2\u6570\u6307\u5B9A\u5176\u4ED6\u6027\u80FD\u5206\u6790\u6A21\u5F0F\uFF0C\u89C1\u4E0B\u6587\u3002</p></div><h2 id="\u83B7\u53D6\u5DF2\u91C7\u96C6\u7684-sample-\u7684\u6570\u91CF" tabindex="-1"><a class="header-anchor" href="#\u83B7\u53D6\u5DF2\u91C7\u96C6\u7684-sample-\u7684\u6570\u91CF" aria-hidden="true">#</a> \u83B7\u53D6\u5DF2\u91C7\u96C6\u7684 sample \u7684\u6570\u91CF</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ profiler getSamples
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23
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="\u67E5\u770B-profiling-\u72B6\u6001" tabindex="-1"><a class="header-anchor" href="#\u67E5\u770B-profiling-\u72B6\u6001" aria-hidden="true">#</a> \u67E5\u770B profiling \u72B6\u6001</h2><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler status
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<span class="token punctuation">[</span>cpu<span class="token punctuation">]</span> profiling is running <span class="token keyword">for</span> <span class="token number">4</span> seconds
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u53EF\u4EE5\u67E5\u770B\u5F53\u524D profiler \u5728\u91C7\u6837\u54EA\u79CD<code>event</code>\u548C\u91C7\u6837\u65F6\u95F4\u3002</p><h2 id="\u67E5\u770B-profiler-\u81EA\u8EAB\u7684\u5185\u5B58\u5360\u7528" tabindex="-1"><a class="header-anchor" href="#\u67E5\u770B-profiler-\u81EA\u8EAB\u7684\u5185\u5B58\u5360\u7528" aria-hidden="true">#</a> \u67E5\u770B profiler \u81EA\u8EAB\u7684\u5185\u5B58\u5360\u7528</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ profiler meminfo
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Call trace storage: 10244 KB
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Dictionaries: 72 KB
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Code cache: 12890 KB
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------------------------------
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Total: 23206 KB
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="\u505C\u6B62-profiler" tabindex="-1"><a class="header-anchor" href="#\u505C\u6B62-profiler" aria-hidden="true">#</a> \u505C\u6B62 profiler</h2><h3 id="\u751F\u6210\u706B\u7130\u56FE\u683C\u5F0F\u7ED3\u679C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6210\u706B\u7130\u56FE\u683C\u5F0F\u7ED3\u679C" aria-hidden="true">#</a> \u751F\u6210\u706B\u7130\u56FE\u683C\u5F0F\u7ED3\u679C</h3>`,14),P=a("\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0C\u7ED3\u679C\u662F "),R={href:"https://github.com/BrendanGregg/FlameGraph",target:"_blank",rel:"noopener noreferrer"},I=a("Flame Graph"),M=a(" \u683C\u5F0F\u7684 "),N=e("code",null,"html",-1),w=a(" \u6587\u4EF6\uFF0C\u4E5F\u53EF\u4EE5\u7528 "),L=e("code",null,"-o",-1),T=a(" \u6216 "),U=e("code",null,"--format",-1),E=a(" \u53C2\u6570\u6307\u5B9A\u5176\u4ED6\u5185\u5BB9\u683C\u5F0F\uFF0C\u5305\u62EC flat\u3001traces\u3001collapsed\u3001flamegraph\u3001tree\u3001jfr\u3002"),$=i(`<div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler stop <span class="token parameter variable">--format</span> flamegraph
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profiler output file: /tmp/test/arthas-output/20211207-111550.html
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OK
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5728<code>--file</code>\u53C2\u6570\u6307\u5B9A\u7684\u6587\u4EF6\u540D\u540E\u7F00\u4E3A <code>html</code> \u6216 <code>jfr</code> \u65F6\uFF0C\u6587\u4EF6\u683C\u5F0F\u53EF\u4EE5\u88AB\u63A8\u65AD\u51FA\u6765\u3002\u6BD4\u5982<code>--file /tmp/result.html</code> \u5C06\u81EA\u52A8\u751F\u6210\u706B\u7130\u56FE\u3002</p><h2 id="\u901A\u8FC7\u6D4F\u89C8\u5668\u67E5\u770B-arthas-output-\u4E0B\u9762\u7684-profiler-\u7ED3\u679C" tabindex="-1"><a class="header-anchor" href="#\u901A\u8FC7\u6D4F\u89C8\u5668\u67E5\u770B-arthas-output-\u4E0B\u9762\u7684-profiler-\u7ED3\u679C" aria-hidden="true">#</a> \u901A\u8FC7\u6D4F\u89C8\u5668\u67E5\u770B arthas-output \u4E0B\u9762\u7684 profiler \u7ED3\u679C</h2>`,3),B=a("\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0Carthas \u4F7F\u7528 3658 \u7AEF\u53E3\uFF0C\u5219\u53EF\u4EE5\u6253\u5F00\uFF1A "),W={href:"http://localhost:3658/arthas-output/",target:"_blank",rel:"noopener noreferrer"},A=a("http://localhost:3658/arthas-output/"),D=a(" \u67E5\u770B\u5230"),V=e("code",null,"arthas-output",-1),K=a("\u76EE\u5F55\u4E0B\u9762\u7684 profiler \u7ED3\u679C\uFF1A"),z=i('<p><img src="'+r+'" alt=""></p><p>\u70B9\u51FB\u53EF\u4EE5\u67E5\u770B\u5177\u4F53\u7684\u7ED3\u679C\uFF1A</p><p><img src="'+o+`" alt=""></p><div class="custom-container tip"><p class="custom-container-title">\u63D0\u793A</p><p>\u5982\u679C\u662F chrome \u6D4F\u89C8\u5668\uFF0C\u53EF\u80FD\u9700\u8981\u591A\u6B21\u5237\u65B0\u3002</p></div><h2 id="profiler-\u652F\u6301\u7684-events" tabindex="-1"><a class="header-anchor" href="#profiler-\u652F\u6301\u7684-events" aria-hidden="true">#</a> profiler \u652F\u6301\u7684 events</h2><p>\u5728\u4E0D\u540C\u7684\u5E73\u53F0\uFF0C\u4E0D\u540C\u7684 OS \u4E0B\u9762\uFF0C\u652F\u6301\u7684 events \u5404\u6709\u4E0D\u540C\u3002\u6BD4\u5982\u5728 macos \u4E0B\u9762\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler list
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Basic events:
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cpu
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alloc
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lock
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wall
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itimer
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ctimer
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>\u5728 linux \u4E0B\u9762</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler list
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Basic events:
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cpu
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alloc
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lock
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wall
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itimer
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ctimer
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Java method calls:
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ClassName.methodName
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Perf events:
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page-faults
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context-switches
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cycles
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instructions
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cache-references
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cache-misses
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branch-instructions
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branch-misses
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bus-cycles
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L1-dcache-load-misses
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LLC-load-misses
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dTLB-load-misses
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rNNN
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pmu/event-descriptor/
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mem:breakpoint
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trace:tracepoint
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kprobe:func
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uprobe:path
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div>`,9),q=a("\u5982\u679C\u9047\u5230 OS \u672C\u8EAB\u7684\u6743\u9650/\u914D\u7F6E\u95EE\u9898\uFF0C\u7136\u540E\u7F3A\u5C11\u90E8\u5206 event\uFF0C\u53EF\u4EE5\u53C2\u8003 "),H={href:"https://github.com/jvm-profiling-tools/async-profiler",target:"_blank",rel:"noopener noreferrer"},X=a("async-profiler \u7684\u6587\u6863"),Y=a("\u3002"),Q=i(`<p>\u53EF\u4EE5\u4F7F\u7528 <code>check</code> action \u6D4B\u8BD5\u67D0\u4E2A event \u662F\u5426\u53EF\u7528\uFF0C\u6B64 action \u7684\u53C2\u6570\u683C\u5F0F\u4E0E start \u4E00\u81F4\u3002</p><p>\u53EF\u4EE5\u7528<code>--event</code>\u53C2\u6570\u6307\u5B9A\u8981\u91C7\u6837\u7684\u4E8B\u4EF6\uFF0C\u6BD4\u5982 <code>alloc</code> \u8868\u793A\u5206\u6790\u5185\u5B58\u5206\u914D\u60C5\u51B5\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler start <span class="token parameter variable">--event</span> alloc
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u6062\u590D\u91C7\u6837" tabindex="-1"><a class="header-anchor" href="#\u6062\u590D\u91C7\u6837" aria-hidden="true">#</a> \u6062\u590D\u91C7\u6837</h2><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler resume
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Started <span class="token punctuation">[</span>cpu<span class="token punctuation">]</span> profiling
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p><code>start</code>\u548C<code>resume</code>\u7684\u533A\u522B\u662F\uFF1A<code>start</code>\u4F1A\u6E05\u9664\u5DF2\u6709\u7684\u5206\u6790\u7ED3\u679C\u91CD\u65B0\u5F00\u59CB\uFF0C<code>resume</code>\u5219\u4F1A\u4FDD\u7559\u5DF2\u6709\u7684\u7ED3\u679C\uFF0C\u5C06\u65B0\u7684\u5206\u6790\u7ED3\u679C\u9644\u52A0\u5230\u5DF2\u6709\u7ED3\u679C\u4E2D\u3002</p><p>\u901A\u8FC7\u6267\u884C<code>profiler getSamples</code>\u53EF\u4EE5\u67E5\u770B samples \u7684\u6570\u91CF\u6765\u9A8C\u8BC1\u3002</p><h2 id="dump-\u5206\u6790\u7ED3\u679C" tabindex="-1"><a class="header-anchor" href="#dump-\u5206\u6790\u7ED3\u679C" aria-hidden="true">#</a> Dump \u5206\u6790\u7ED3\u679C</h2><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler dump
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OK
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p><code>dump</code> action \u5C06\u6027\u80FD\u5206\u6790\u7684\u7ED3\u679C\u4FDD\u5B58\u5230\u9ED8\u8BA4\u6587\u4EF6\u6216\u6307\u5B9A\u7684\u6587\u4EF6\u4E2D\uFF0C\u4F46 profiling \u8FC7\u7A0B\u4E0D\u4F1A\u505C\u6B62\u3002\u4F8B\u5982\uFF0C\u5982\u679C\u4F7F\u7528 <code>start</code> action \u542F\u52A8 profiling\uFF0C5 \u79D2\u540E\u6267\u884C <code>dump</code> action\uFF0C2 \u79D2\u540E\u518D\u6B21\u6267\u884C <code>dump</code> action\uFF0C\u5C06\u4F1A\u5F97\u5230 2 \u4E2A\u7ED3\u679C\u6587\u4EF6\uFF0C\u7B2C\u4E00\u4E2A\u6587\u4EF6\u5305\u62EC 0~5 \u79D2\u7684\u5206\u6790\u7ED3\u679C\uFF0C\u7B2C\u4E8C\u4E2A\u6587\u4EF6\u5305\u62EC 0~7 \u79D2\u7684\u5206\u6790\u7ED3\u679C\u3002</p><h2 id="\u4F7F\u7528execute\u6765\u6267\u884C\u590D\u6742\u7684\u547D\u4EE4" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528execute\u6765\u6267\u884C\u590D\u6742\u7684\u547D\u4EE4" aria-hidden="true">#</a> \u4F7F\u7528<code>execute</code>\u6765\u6267\u884C\u590D\u6742\u7684\u547D\u4EE4</h2><p>\u6BD4\u5982\u5F00\u59CB\u91C7\u6837\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler execute <span class="token string">'start,framebuf=5000000'</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u505C\u6B62\u91C7\u6837\uFF0C\u5E76\u4FDD\u5B58\u5230\u6307\u5B9A\u6587\u4EF6\u91CC\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler execute <span class="token string">'stop,file=/tmp/result.html'</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div>`,15),Z=a("\u5177\u4F53\u7684\u683C\u5F0F\u53C2\u8003\uFF1A "),ee={href:"https://github.com/async-profiler/async-profiler/blob/v2.9/src/arguments.cpp#L52",target:"_blank",rel:"noopener noreferrer"},ae=a("arguments.cpp"),se=i(`<h2 id="\u67E5\u770B\u6240\u6709\u652F\u6301\u7684-action" tabindex="-1"><a class="header-anchor" href="#\u67E5\u770B\u6240\u6709\u652F\u6301\u7684-action" aria-hidden="true">#</a> \u67E5\u770B\u6240\u6709\u652F\u6301\u7684 action</h2><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler actions
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Supported Actions: <span class="token punctuation">[</span>resume, dumpCollapsed, getSamples, start, list, version, execute, meminfo, stop, load, dumpFlat, dump, actions, dumpTraces, status, check<span class="token punctuation">]</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="\u67E5\u770B\u7248\u672C" tabindex="-1"><a class="header-anchor" href="#\u67E5\u770B\u7248\u672C" aria-hidden="true">#</a> \u67E5\u770B\u7248\u672C</h2><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ profiler version
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Async-profiler <span class="token number">2.9</span> built on May <span class="token number">8</span> <span class="token number">2023</span>
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Copyright <span class="token number">2016</span>-2021 Andrei Pangin
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="\u914D\u7F6E-java-\u6808\u6DF1\u5EA6" tabindex="-1"><a class="header-anchor" href="#\u914D\u7F6E-java-\u6808\u6DF1\u5EA6" aria-hidden="true">#</a> \u914D\u7F6E Java \u6808\u6DF1\u5EA6</h2><p>\u53EF\u4EE5\u4F7F\u7528 <code>-j</code> \u6216 <code>--jstackdepth</code> \u9009\u9879\u6307\u5B9A\u6700\u5927 Java \u6808\u6DF1\u5EA6\u3002\u5982\u679C\u6307\u5B9A\u503C\u5927\u4E8E\u9ED8\u8BA4\u503C 2048\uFF0C\u8BE5\u9009\u9879\u4F1A\u88AB\u5FFD\u7565\u3002\u5F53\u4F60\u4E0D\u5E0C\u671B\u770B\u5230\u7279\u522B\u6DF1\u7684\u6808\u8F68\u8FF9\u7684\u65F6\u5019\uFF0C\u8FD9\u4E2A\u9009\u9879\u4F1A\u5F88\u6709\u7528\uFF0C\u4EE5\u4E0B\u662F\u4E00\u4E2A\u4F7F\u7528\u6837\u4F8B\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-j</span> <span class="token number">256</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u5404\u7EBF\u7A0B\u5206\u522B\u8FDB\u884C-profiling" tabindex="-1"><a class="header-anchor" href="#\u5404\u7EBF\u7A0B\u5206\u522B\u8FDB\u884C-profiling" aria-hidden="true">#</a> \u5404\u7EBF\u7A0B\u5206\u522B\u8FDB\u884C profiling</h2><p>\u53EF\u4EE5\u4F7F\u7528 <code>-t</code> \u6216 <code>--threads</code> \u6807\u5FD7\u9009\u9879\u4EE4 profiling \u5BF9\u5404\u7EBF\u7A0B\u5206\u522B\u8FDB\u884C\uFF0C\u6BCF\u4E2A\u6808\u8F68\u8FF9\u90FD\u4F1A\u4EE5\u6307\u793A\u5355\u4E2A\u7EBF\u7A0B\u7684\u5E27\u7ED3\u675F\u3002</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-t</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u914D\u7F6E-include-exclude-\u6765\u8FC7\u6EE4\u6570\u636E" tabindex="-1"><a class="header-anchor" href="#\u914D\u7F6E-include-exclude-\u6765\u8FC7\u6EE4\u6570\u636E" aria-hidden="true">#</a> \u914D\u7F6E include/exclude \u6765\u8FC7\u6EE4\u6570\u636E</h2><p>\u5982\u679C\u5E94\u7528\u6BD4\u8F83\u590D\u6742\uFF0C\u751F\u6210\u7684\u5185\u5BB9\u5F88\u591A\uFF0C\u60F3\u53EA\u5173\u6CE8\u90E8\u5206 stack traces\uFF0C\u53EF\u4EE5\u901A\u8FC7 <code>--include/--exclude</code> \u8FC7\u6EE4 stack traces\uFF0C<code>--include</code> \u8868\u793A\u5B9A\u4E49\u7684\u5339\u914D\u8868\u8FBE\u5F0F\u5FC5\u987B\u51FA\u73B0\u5728 stack traces\uFF0C\u76F8\u53CD <code>--exclude</code> \u8868\u793A\u5B9A\u4E49\u7684\u5339\u914D\u8868\u8FBE\u5F0F\u4E00\u5B9A\u4E0D\u4F1A\u51FA\u73B0\u5728 stack traces\u3002 \u5339\u914D\u8868\u8FBE\u5F0F\u53EF\u4EE5\u4EE5<code>*</code>\u5F00\u59CB\u6216\u8005\u7ED3\u675F,<code>*</code> \u8868\u793A\u4EFB\u4F55\uFF08\u53EF\u80FD\u4E3A\u7A7A\uFF09\u5B57\u7B26\u5E8F\u5217\u3002 \u6BD4\u5982</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler stop <span class="token parameter variable">--include</span> <span class="token string">'java/*'</span> <span class="token parameter variable">--include</span> <span class="token string">'com/demo/*'</span> <span class="token parameter variable">--exclude</span> <span class="token string">'*Unsafe.park*'</span>
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><blockquote><p><code>--include/--exclude</code> \u90FD\u652F\u6301\u591A\u6B21\u8BBE\u7F6E\uFF0C\u4F46\u662F\u9700\u8981\u914D\u7F6E\u5728\u547D\u4EE4\u884C\u7684\u6700\u540E\u3002\u4E5F\u53EF\u4F7F\u7528\u77ED\u53C2\u6570\u683C\u5F0F <code>-I/-X</code>\u3002 \u6CE8\u610F<code>--include/--exclude</code>\u53EA\u652F\u6301\u5728<code>stop</code>action\u6216\u8005\u5E26\u6709<code>-d</code>/<code>--duration</code>\u53C2\u6570\u7684<code>start</code>action\u4E2D\u6307\u5B9A\uFF0C\u5426\u5219\u4E0D\u751F\u6548\u3002</p></blockquote><h2 id="\u6307\u5B9A\u6267\u884C\u65F6\u95F4" tabindex="-1"><a class="header-anchor" href="#\u6307\u5B9A\u6267\u884C\u65F6\u95F4" aria-hidden="true">#</a> \u6307\u5B9A\u6267\u884C\u65F6\u95F4</h2><p>\u6BD4\u5982\uFF0C\u5E0C\u671B profiler \u6267\u884C 300 \u79D2\u81EA\u52A8\u7ED3\u675F\uFF0C\u53EF\u4EE5\u7528 <code>-d</code>/<code>--duration</code> \u53C2\u6570\u4E3A collect action \u6307\u5B9A\u65F6\u95F4\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler collect <span class="token parameter variable">--duration</span> <span class="token number">300</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u751F\u6210-jfr-\u683C\u5F0F\u7ED3\u679C" tabindex="-1"><a class="header-anchor" href="#\u751F\u6210-jfr-\u683C\u5F0F\u7ED3\u679C" aria-hidden="true">#</a> \u751F\u6210 jfr \u683C\u5F0F\u7ED3\u679C</h2><blockquote><p>\u6CE8\u610F\uFF0Cjfr \u53EA\u652F\u6301\u5728 <code>start</code>\u65F6\u914D\u7F6E\u3002\u5982\u679C\u662F\u5728<code>stop</code>\u65F6\u6307\u5B9A\uFF0C\u5219\u4E0D\u4F1A\u751F\u6548\u3002</p></blockquote><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>profiler start --file /tmp/test.jfr
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profiler start -o jfr
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p><code>file</code>\u53C2\u6570\u652F\u6301\u4E00\u4E9B\u53D8\u91CF\uFF1A</p><ul><li>\u65F6\u95F4\u6233\uFF1A <code>--file /tmp/test-%t.jfr</code></li><li>\u8FDB\u7A0B ID\uFF1A <code>--file /tmp/test-%p.jfr</code></li></ul><p>\u751F\u6210\u7684\u7ED3\u679C\u53EF\u4EE5\u7528\u652F\u6301 jfr \u683C\u5F0F\u7684\u5DE5\u5177\u6765\u67E5\u770B\u3002\u6BD4\u5982\uFF1A</p><ul><li>JDK Mission Control \uFF1A https://github.com/openjdk/jmc</li><li>JProfiler \uFF1A https://github.com/alibaba/arthas/issues/1416</li></ul><h2 id="\u63A7\u5236\u5206\u6790\u7ED3\u679C\u7684\u683C\u5F0F" tabindex="-1"><a class="header-anchor" href="#\u63A7\u5236\u5206\u6790\u7ED3\u679C\u7684\u683C\u5F0F" aria-hidden="true">#</a> \u63A7\u5236\u5206\u6790\u7ED3\u679C\u7684\u683C\u5F0F</h2>`,25),ne=a("\u4F7F\u7528 "),ie=e("code",null,"-s",-1),re=a(" \u9009\u9879\u5C06\u7ED3\u679C\u4E2D\u7684 Fully qualified name \u66FF\u6362\u4E3A\u7B80\u5355\u540D\u79F0\uFF0C\u5982 "),oe=e("code",null,"demo.MathGame.main",-1),le=a(" \u66FF\u6362\u4E3A "),te=e("code",null,"MathGame.main",-1),de=a("\u3002\u4F7F\u7528 "),ce=e("code",null,"-g",-1),pe=a(" \u9009\u9879\u6307\u5B9A\u8F93\u51FA\u65B9\u6CD5\u7B7E\u540D\uFF0C\u5982 "),he=e("code",null,"demo.MathGame.main",-1),ue=a(" \u66FF\u6362\u4E3A "),ve=e("code",null,"demo.MathGame.main([Ljava/lang/String;)V",-1),me=a("\u3002\u6B64\u5916\u8FD8\u6709\u8BB8\u591A\u53EF\u8C03\u6574\u5206\u6790\u7ED3\u679C\u683C\u5F0F\u7684\u9009\u9879\uFF0C\u53EF\u53C2\u8003 "),be={href:"https://github.com/async-profiler/async-profiler#readme",target:"_blank",rel:"noopener noreferrer"},fe=a("async-profiler \u7684 README \u6587\u6863"),_e=a(" \u4EE5\u53CA "),ge={href:"https://github.com/async-profiler/async-profiler/discussions",target:"_blank",rel:"noopener noreferrer"},ke=a("async-profiler \u7684 Github Discussions"),xe=a(" \u7B49\u6750\u6599\u3002"),ye=i(`<p>\u4F8B\u5982\uFF0C\u4EE5\u4E0B\u547D\u4EE4\u4E2D\uFF0C<code>-s</code> \u5C06\u8F93\u51FA\u4E2D\u7684\u7C7B\u540D\u79F0\u6307\u5B9A\u4E3A\u7B80\u77ED\u683C\u5F0F\uFF0C<code>-g</code> \u663E\u793A\u65B9\u6CD5\u7684\u5B8C\u6574\u7B7E\u540D\uFF0C<code>-a</code> \u6807\u6CE8\u51FA Java \u65B9\u6CD5\uFF0C<code>-l</code> \u4E3A\u539F\u751F\u65B9\u6CD5\u589E\u52A0\u5E93\u540D\u79F0\uFF0C<code>--title</code> \u4E3A\u751F\u6210\u706B\u7130\u56FE\u9875\u9762\u6307\u5B9A\u6807\u9898\uFF0C<code>--minwidth</code> \u5C06\u8FC7\u6EE4\u706B\u7130\u56FE\u4E2D\u5BBD\u5EA6\u4E3A 15% \u4EE5\u4E0B\u7684\u5E27\uFF0C<code>--reverse</code> \u5C06\u706B\u7130\u56FE\u5012\u7F6E\u3002</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>profiler stop -s -g -a -l --title <flametitle> --minwidth 15 --reverse
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u751F\u6210\u7684\u706B\u7130\u56FE\u91CC\u7684-unknown" tabindex="-1"><a class="header-anchor" href="#\u751F\u6210\u7684\u706B\u7130\u56FE\u91CC\u7684-unknown" aria-hidden="true">#</a> \u751F\u6210\u7684\u706B\u7130\u56FE\u91CC\u7684 unknown</h2><ul><li>https://github.com/jvm-profiling-tools/async-profiler/discussions/409</li></ul><h2 id="\u914D\u7F6E-locks-allocations-\u6A21\u5F0F\u7684\u9608\u503C" tabindex="-1"><a class="header-anchor" href="#\u914D\u7F6E-locks-allocations-\u6A21\u5F0F\u7684\u9608\u503C" aria-hidden="true">#</a> \u914D\u7F6E locks/allocations \u6A21\u5F0F\u7684\u9608\u503C</h2><p>\u5F53\u4F7F\u7528 lock \u6216 alloc event \u8FDB\u884C profiling \u65F6\uFF0C\u53EF\u4EE5\u4F7F\u7528 <code>--lock</code> \u6216 <code>--alloc</code> \u914D\u7F6E\u9608\u503C\uFF0C\u6BD4\u5982\u4E0B\u5217\u547D\u4EE4\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-e</span> lock <span class="token parameter variable">--lock</span> 10ms
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profiler start <span class="token parameter variable">-e</span> alloc <span class="token parameter variable">--alloc</span> 2m
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u4F1A\u8BB0\u5F55\u7ADE\u4E89\u65F6\u95F4\u8D85\u8FC7 10ms \u7684\u9501\uFF08\u5982\u679C\u4E0D\u6307\u5B9A\u65F6\u95F4\u5355\u4F4D\uFF0C\u5219\u4F7F\u7528 ns \u4E3A\u5355\u4F4D\uFF09\uFF0C\u6216\u8005\u4EE5 2MB \u7684\u5355\u4F4D\u8BB0\u5F55\u5BF9\u5185\u5B58\u7684\u5206\u914D\u3002</p><h2 id="\u914D\u7F6E-jfr-\u5757" tabindex="-1"><a class="header-anchor" href="#\u914D\u7F6E-jfr-\u5757" aria-hidden="true">#</a> \u914D\u7F6E JFR \u5757</h2><p>\u5F53\u4F7F\u7528 JFR \u4F5C\u4E3A\u8F93\u51FA\u683C\u5F0F\u65F6\uFF0C\u53EF\u4EE5\u4F7F\u7528 <code>--chunksize</code> \u6216 <code>--chunktime</code> \u914D\u7F6E\u5355\u4E2A JFR \u5757\u7684\u5927\u81F4\u5BB9\u91CF\uFF08\u4EE5 byte \u4E3A\u5355\u4F4D\uFF0C\u9ED8\u8BA4 100 MB\uFF09\u548C\u65F6\u95F4\u9650\u5236\uFF08\u9ED8\u8BA4\u503C\u4E3A 1 \u5C0F\u65F6\uFF09\uFF0C\u6BD4\u5982\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-f</span> profile.jfr <span class="token parameter variable">--chunksize</span> 100m <span class="token parameter variable">--chunktime</span> 1h
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u5C06\u7EBF\u7A0B\u6309\u7167\u8C03\u5EA6\u7B56\u7565\u5206\u7EC4" tabindex="-1"><a class="header-anchor" href="#\u5C06\u7EBF\u7A0B\u6309\u7167\u8C03\u5EA6\u7B56\u7565\u5206\u7EC4" aria-hidden="true">#</a> \u5C06\u7EBF\u7A0B\u6309\u7167\u8C03\u5EA6\u7B56\u7565\u5206\u7EC4</h2><p>\u53EF\u4EE5\u4F7F\u7528 <code>--sched</code> \u6807\u5FD7\u9009\u9879\u5C06\u8F93\u51FA\u7ED3\u679C\u6309\u7167 Linux \u7EBF\u7A0B\u8C03\u5EA6\u7B56\u7565\u5206\u7EC4\uFF0C\u7B56\u7565\u5305\u62EC BATCH/IDLE/OTHER\u3002\u4F8B\u5982\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--sched</span>
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u706B\u7130\u56FE\u7684\u5012\u6570\u7B2C\u4E8C\u884C\u4F1A\u6807\u8BB0\u4E0D\u540C\u7684\u8C03\u5EA6\u7B56\u7565\u3002</p><h2 id="\u4EC5\u7528\u672A\u9500\u6BC1\u5BF9\u8C61\u6784\u5EFA\u5185\u5B58\u5206\u6790\u7ED3\u679C" tabindex="-1"><a class="header-anchor" href="#\u4EC5\u7528\u672A\u9500\u6BC1\u5BF9\u8C61\u6784\u5EFA\u5185\u5B58\u5206\u6790\u7ED3\u679C" aria-hidden="true">#</a> \u4EC5\u7528\u672A\u9500\u6BC1\u5BF9\u8C61\u6784\u5EFA\u5185\u5B58\u5206\u6790\u7ED3\u679C</h2><p>\u4F7F\u7528 <code>--live</code> \u6807\u5FD7\u9009\u9879\u5728\u5185\u5B58\u5206\u6790\u7ED3\u679C\u4E2D\u4EC5\u4FDD\u7559\u90A3\u4E9B\u5728\u5206\u6790\u8FC7\u7A0B\u7ED3\u675F\u65F6\u4ECD\u672A\u88AB JVM \u56DE\u6536\u7684\u5BF9\u8C61\u3002\u8BE5\u9009\u9879\u5728\u6392\u67E5 Java \u5806\u5185\u5B58\u6CC4\u9732\u95EE\u9898\u65F6\u6BD4\u8F83\u6709\u7528\u3002</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--live</span>
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u914D\u7F6E\u6536\u96C6-c-\u6808\u5E27\u7684\u65B9\u6CD5" tabindex="-1"><a class="header-anchor" href="#\u914D\u7F6E\u6536\u96C6-c-\u6808\u5E27\u7684\u65B9\u6CD5" aria-hidden="true">#</a> \u914D\u7F6E\u6536\u96C6 C \u6808\u5E27\u7684\u65B9\u6CD5</h2><p>\u4F7F\u7528 <code>--cstack MODE</code> \u914D\u7F6E\u6536\u96C6 native \u5E27\u7684\u65B9\u6CD5\u3002\u5019\u9009\u6A21\u5F0F\u6709 fp (Frame Pointer), dwarf (DWARF unwind info), lbr (Last Branch Record, \u4ECE Linux 4.1 \u5728 Haswell \u53EF\u7528), and no (\u4E0D\u6536\u96C6 native \u6808\u5E27).</p><p>\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0CC \u6808\u5E27\u4F1A\u51FA\u73B0\u5728 cpu\u3001itimer\u3001wall-clock\u3001perf-events \u6A21\u5F0F\u4E2D\uFF0C\u800C Java \u7EA7\u522B\u7684 event \u6BD4\u5982 alloc \u548C lock \u53EA\u6536\u96C6 Java stack\u3002</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler <span class="token parameter variable">--cstack</span> fp
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u6B64\u547D\u4EE4\u5C06\u6536\u96C6 native \u6808\u5E27\u7684 Frame Pointer \u4FE1\u606F\u3002</p><h2 id="\u5F53\u6307\u5B9A-native-\u51FD\u6570\u6267\u884C\u65F6\u5F00\u59CB-\u505C\u6B62-profiling" tabindex="-1"><a class="header-anchor" href="#\u5F53\u6307\u5B9A-native-\u51FD\u6570\u6267\u884C\u65F6\u5F00\u59CB-\u505C\u6B62-profiling" aria-hidden="true">#</a> \u5F53\u6307\u5B9A Native \u51FD\u6570\u6267\u884C\u65F6\u5F00\u59CB/\u505C\u6B62 Profiling</h2><p>\u4F7F\u7528 <code>--begin function</code> \u548C <code>--end function</code> \u9009\u9879\uFF0C\u53EF\u4EE5\u5728\u6307\u5B9A\u7684 Native \u51FD\u6570\u88AB\u6267\u884C\u65F6\u542F\u52A8\u6216\u7EC8\u6B62\u6027\u80FD\u5206\u6790\u3002\u4E3B\u8981\u7528\u9014\u662F\u5206\u6790\u7279\u5B9A\u7684 JVM \u9636\u6BB5\uFF0C\u6BD4\u5982 GC \u548C Safepoint\u3002\u9700\u8981\u4F7F\u7528\u7279\u5B9A JVM \u5B9E\u73B0\u4E2D\u7684 Native \u51FD\u6570\u540D\uFF0C\u6BD4\u5982\u5728 HotSpot JVM \u4E2D\u7684 SafepointSynchronize::begin \u548C SafepointSynchronize::end\u3002</p><h3 id="time-to-safepoint-profiling" tabindex="-1"><a class="header-anchor" href="#time-to-safepoint-profiling" aria-hidden="true">#</a> Time-to-Safepoint Profiling</h3><p>\u9009\u9879 <code>--ttsp</code> \u5B9E\u9645\u4E0A\u662F <code>--begin SafepointSynchronize::begin --end RuntimeService::record_safepoint_synchronized</code> \u7684\u4E00\u4E2A\u522B\u540D\u3002\u5B83\u662F\u4E00\u79CD\u7EA6\u675F\uFF0C\u800C\u4E0D\u662F\u72EC\u7ACB\u7684\u4E8B\u4EF6\u7C7B\u578B\u3002\u65E0\u8BBA\u9009\u62E9\u54EA\u79CD\u4E8B\u4EF6\uFF0CProfiler \u90FD\u53EF\u4EE5\u6B63\u5E38\u5DE5\u4F5C\uFF0C\u4F46\u53EA\u6709\u5728 VM \u64CD\u4F5C\u548C Safepoint \u8BF7\u6C42\u4E4B\u95F4\u7684\u4E8B\u4EF6\u4F1A\u88AB\u8BB0\u5F55\u4E0B\u6765\u3002</p><p>\u73B0\u5728\uFF0C\u5F53\u4F7F\u7528 <code>--ttsp</code> \u9009\u9879\u5E76\u6307\u5B9A JFR \u8F93\u51FA\u683C\u5F0F\u65F6\uFF0C<code>profiler</code> \u4F1A\u5728\u751F\u6210\u7684 JFR \u6587\u4EF6\u4E2D\u81EA\u52A8\u5305\u542B profiler.Window \u4E8B\u4EF6\u3002\u8FD9\u4E9B\u4E8B\u4EF6\u8868\u793A\u6BCF\u6B21 Time-to-Safepoint \u6682\u505C\u7684\u65F6\u95F4\u533A\u95F4\uFF0C\u4F7F\u60A8\u65E0\u9700\u4F9D\u8D56 JVM \u65E5\u5FD7\u5373\u53EF\u5206\u6790\u8FD9\u4E9B\u6682\u505C\u3002</p><p>\u793A\u4F8B</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--begin</span> SafepointSynchronize::begin <span class="token parameter variable">--end</span> RuntimeService::record_safepoint_synchronized
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|
profiler start <span class="token parameter variable">--ttsp</span> <span class="token parameter variable">--format</span> jfr
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>\u751F\u6210\u7684 JFR \u6587\u4EF6\u5C06\u5305\u542B profiler.Window \u4E8B\u4EF6\uFF0C\u53EF\u4EE5\u4F7F\u7528 JDK Mission Control \u7B49\u5DE5\u5177\u67E5\u770B\u548C\u5206\u6790\u8FD9\u4E9B\u4E8B\u4EF6\u3002</p><p><strong>\u6CE8\u610F\u4E8B\u9879:</strong></p><ul><li><p>profiler.Window \u4E8B\u4EF6\u662F\u901A\u7528\u7684\u4E8B\u4EF6\uFF0C\u9002\u7528\u4E8E\u4EFB\u4F55\u4F7F\u7528 --begin \u548C --end \u89E6\u53D1\u5668\u7684\u65F6\u95F4\u7A97\u53E3\uFF0C\u4E0D\u4EC5\u9650\u4E8E Safepoint \u6682\u505C\u3002</p></li><li><p>\u5728\u5206\u6790\u957F\u65F6\u95F4\u7684 Safepoint \u6682\u505C\u65F6\uFF0Cprofiler.Window \u4E8B\u4EF6\u53EF\u5E2E\u52A9\u60A8\u8BC6\u522B\u9020\u6210\u5EF6\u8FDF\u7684\u539F\u56E0\u3002</p></li><li><p>\u5F53\u4F7F\u7528 --ttsp \u9009\u9879\u65F6\uFF0C\u8BF7\u786E\u4FDD\u4F7F\u7528 JFR \u8F93\u51FA\u683C\u5F0F\uFF0C\u4EE5\u4FBF\u80FD\u591F\u751F\u6210\u5E76\u67E5\u770B profiler.Window \u4E8B\u4EF6\u3002</p></li></ul><h2 id="\u4F7F\u7528-profiler-\u8BB0\u5F55\u7684-event-\u751F\u6210-jfr-\u6587\u4EF6" tabindex="-1"><a class="header-anchor" href="#\u4F7F\u7528-profiler-\u8BB0\u5F55\u7684-event-\u751F\u6210-jfr-\u6587\u4EF6" aria-hidden="true">#</a> \u4F7F\u7528 profiler \u8BB0\u5F55\u7684 event \u751F\u6210 JFR \u6587\u4EF6</h2><p>\u7528 <code>--jfrsync CONFIG</code> \u9009\u9879\u53EF\u4EE5\u6307\u5B9A\u914D\u7F6E\u542F\u52A8 Java Flight Recording\uFF0C\u8F93\u51FA\u7684 jfr \u6587\u4EF6\u4F1A\u5305\u542B\u6240\u6709\u5E38\u89C4\u7684 JFR event\uFF0C\u4F46\u91C7\u6837\u7684\u6765\u6E90\u662F\u7531 profiler \u63D0\u4F9B\u7684\u3002</p><p>CONFIG \u53C2\u6570:</p><ul><li>\u9884\u7F6E\u914D\u7F6E\uFF1ACONFIG \u53EF\u4EE5\u662F profile\uFF0C\u8868\u793A\u4F7F\u7528 $JAVA_HOME/lib/jfr \u76EE\u5F55\u4E0B\u9884\u7F6E\u7684 profile \u914D\u7F6E\u3002</li><li>\u81EA\u5B9A\u4E49\u914D\u7F6E\u6587\u4EF6\uFF1ACONFIG \u4E5F\u53EF\u4EE5\u662F\u81EA\u5B9A\u4E49\u7684 JFR \u914D\u7F6E\u6587\u4EF6\uFF08.jfc\uFF09\uFF0C\u6B64\u9009\u9879\u7684\u503C\u91C7\u7528\u4E0E jcmd JFR.start \u547D\u4EE4\u7684 settings \u9009\u9879\u76F8\u540C\u7684\u683C\u5F0F\u3002</li><li>\u6307\u5B9A JFR \u4E8B\u4EF6\u5217\u8868\uFF1A\u73B0\u5728\uFF0C\u53EF\u4EE5\u76F4\u63A5\u5728 --jfrsync \u4E2D\u6307\u5B9A\u8981\u542F\u7528\u7684 JFR \u4E8B\u4EF6\u5217\u8868\uFF0C\u800C\u65E0\u9700\u521B\u5EFA .jfc \u6587\u4EF6\u3002\u8981\u6307\u5B9A\u4E8B\u4EF6\u5217\u8868\uFF0C\u8BF7\u4EE5 + \u5F00\u5934\uFF0C\u591A\u4E2A\u4E8B\u4EF6\u7528 + \u5206\u9694\u3002</li></ul><p>\u793A\u4F8B\uFF1A</p><p>\u4F7F\u7528\u9884\u7F6E\u7684 profile \u914D\u7F6E\u542F\u52A8 JFR\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-e</span> cpu <span class="token parameter variable">--jfrsync</span> profile <span class="token parameter variable">-f</span> combined.jfr
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u76F4\u63A5\u6307\u5B9A JFR \u4E8B\u4EF6\u5217\u8868\uFF0C\u4F8B\u5982\u542F\u7528 jdk.YoungGarbageCollection \u548C jdk.OldGarbageCollection \u4E8B\u4EF6\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-e</span> cpu <span class="token parameter variable">--jfrsync</span> +jdk.YoungGarbageCollection+jdk.OldGarbageCollection <span class="token parameter variable">-f</span> combined.jfr
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><strong>\u6CE8\u610F\u4E8B\u9879</strong></p><ul><li>\u5F53\u6307\u5B9A\u4E8B\u4EF6\u5217\u8868\u65F6\uFF0C\u7531\u4E8E\u9017\u53F7 , \u7528\u4E8E\u5206\u9694\u4E0D\u540C\u7684\u9009\u9879\uFF0C\u56E0\u6B64\u4E8B\u4EF6\u4E4B\u95F4\u4F7F\u7528\u52A0\u53F7 + \u5206\u9694\u3002</li><li>\u5982\u679C --jfrsync \u53C2\u6570\u4E0D\u4EE5 + \u5F00\u5934\uFF0C\u5219\u88AB\u89C6\u4E3A\u9884\u7F6E\u914D\u7F6E\u540D\u6216 .jfc \u914D\u7F6E\u6587\u4EF6\u7684\u8DEF\u5F84\u3002</li><li>\u76F4\u63A5\u6307\u5B9A\u4E8B\u4EF6\u5217\u8868\u5728\u76EE\u6807\u5E94\u7528\u8FD0\u884C\u5728\u5BB9\u5668\u4E2D\u65F6\u7279\u522B\u6709\u7528\uFF0C\u65E0\u9700\u989D\u5916\u7684\u6587\u4EF6\u64CD\u4F5C\u3002</li></ul><h2 id="\u5468\u671F\u6027\u4FDD\u5B58\u7ED3\u679C" tabindex="-1"><a class="header-anchor" href="#\u5468\u671F\u6027\u4FDD\u5B58\u7ED3\u679C" aria-hidden="true">#</a> \u5468\u671F\u6027\u4FDD\u5B58\u7ED3\u679C</h2><p>\u4F7F\u7528 <code>--loop TIME</code> \u53EF\u4EE5\u6301\u7EED\u8FD0\u884C profiler \u5E76\u5468\u671F\u6027\u4FDD\u5B58\u7ED3\u679C\u3002\u9009\u9879\u683C\u5F0F\u53EF\u4EE5\u662F\u5177\u4F53\u65F6\u95F4 hh:mm:ss \u6216\u4EE5\u79D2\u3001\u5206\u949F\u3001\u5C0F\u65F6\u6216\u5929\u8BA1\u7B97\u7684\u65F6\u95F4\u95F4\u9694\u3002\u9700\u8981\u786E\u4FDD\u6307\u5B9A\u7684\u8F93\u51FA\u6587\u4EF6\u540D\u4E2D\u5305\u542B\u65F6\u95F4\u6233\uFF0C\u5426\u5219\u6BCF\u6B21\u8F93\u51FA\u7684\u7ED3\u679C\u90FD\u4F1A\u8986\u76D6\u4E0A\u6B21\u4FDD\u5B58\u7684\u7ED3\u679C\u3002\u4EE5\u4E0B\u547D\u4EE4\u6301\u7EED\u6267\u884C profiling \u5E76\u5C06\u6BCF\u4E2A\u5C0F\u65F6\u5185\u7684\u8BB0\u5F55\u4FDD\u5B58\u5230\u4E00\u4E2A jfr \u6587\u4EF6\u4E2D\u3002</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--loop</span> 1h <span class="token parameter variable">-f</span> /var/log/profile-%t.jfr
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="timeout-\u9009\u9879" tabindex="-1"><a class="header-anchor" href="#timeout-\u9009\u9879" aria-hidden="true">#</a> <code>--timeout</code> \u9009\u9879</h2>`,48),Ce=a("\u8FD9\u4E2A\u9009\u9879\u6307\u5B9A profiling \u81EA\u52A8\u5728\u591A\u4E45\u540E\u505C\u6B62\u3002\u8BE5\u9009\u9879\u548C "),je=e("code",null,"--loop",-1),Je=a(" \u9009\u9879\u7684\u683C\u5F0F\u4E00\u81F4\uFF0C\u53EF\u4EE5\u662F\u65F6\u95F4\u70B9\uFF0C\u4E5F\u53EF\u4EE5\u662F\u4E00\u4E2A\u65F6\u95F4\u95F4\u9694\u3002\u8FD9\u4E24\u4E2A\u9009\u9879\u90FD\u662F\u7528\u4E8E "),Se=e("code",null,"start",-1),Fe=a(" action \u800C\u4E0D\u662F "),Ge=e("code",null,"collect",-1),Oe=a(" action \u7684\u3002\u53EF\u53C2\u8003 "),Pe={href:"https://github.com/async-profiler/async-profiler/discussions/789",target:"_blank",rel:"noopener noreferrer"},Re=a("async-profiler Github Discussions"),Ie=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),Me=e("h2",{id:"wall-\u9009\u9879",tabindex:"-1"},[e("a",{class:"header-anchor",href:"#wall-\u9009\u9879","aria-hidden":"true"},"#"),a(),e("code",null,"--wall"),a(" \u9009\u9879")],-1),Ne=e("p",null,"\u901A\u8FC7 --wall \u9009\u9879\uFF0C\u53EF\u4EE5\u540C\u65F6\u8FDB\u884C CPU \u548C Wall Clock \u7684\u6027\u80FD\u5206\u6790\u3002",-1),we=e("ol",null,[e("li",null,"\u8FD9\u79CD\u8054\u5408\u5206\u6790\u6709\u52A9\u4E8E\u66F4\u5168\u9762\u5730\u8BC6\u522B\u548C\u7406\u89E3\u5E94\u7528\u7A0B\u5E8F\u7684\u6027\u80FD\u74F6\u9888\u3002"),e("li",null,"\u5141\u8BB8\u7528\u6237\u72EC\u7ACB\u4E8E CPU \u5206\u6790\u8BBE\u7F6E Wall Clock \u5206\u6790\u7684\u91C7\u6837\u95F4\u9694\u3002\u6BD4\u5982\uFF0C\u53EF\u4EE5\u901A\u8FC7\u8BBE\u7F6E -e cpu -i 10 --wall 200\uFF0C\u5C06 CPU \u91C7\u6837\u95F4\u9694\u8BBE\u4E3A 10 \u6BEB\u79D2\uFF0C\u5899\u949F\u91C7\u6837\u95F4\u9694\u8BBE\u4E3A 200 \u6BEB\u79D2\u3002"),e("li",null,"\u8054\u5408\u8FDB\u884C CPU \u548C Wall Clock \u5206\u6790\u65F6\uFF0C\u8F93\u51FA\u683C\u5F0F\u5FC5\u987B\u8BBE\u7F6E\u4E3A jfr\u3002\u8FD9\u4E00\u683C\u5F0F\u652F\u6301\u8BB0\u5F55\u7EBF\u7A0B\u7684\u72B6\u6001\u4FE1\u606F\uFF08\u5982 STATE_RUNNABLE \u6216 STATE_SLEEPING\uFF09\uFF0C\u4ECE\u800C\u533A\u5206\u4E0D\u540C\u7C7B\u578B\u7684\u91C7\u6837\u4E8B\u4EF6\u3002")],-1),Le=a("\u53EF\u53C2\u8003 "),Te={href:"https://github.com/async-profiler/async-profiler/issues/740",target:"_blank",rel:"noopener noreferrer"},Ue=a("async-profiler Github pr#740"),Ee=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),$e=i(`<p>\u5F71\u54CD\uFF1A</p><p>Linux \u5E73\u53F0: \u8FD9\u4E2A\u65B0\u529F\u80FD\u4EC5\u5728 Linux \u5E73\u53F0\u4E0A\u6709\u6548\u3002macOS \u4E0A\u7684 CPU \u5206\u6790\u5F15\u64CE\u5DF2\u7ECF\u57FA\u4E8E Wall clock \u6A21\u5F0F\uFF0C\u56E0\u6B64\u6CA1\u6709\u989D\u5916\u7684\u6536\u76CA\u3002 \u6027\u80FD\u5F00\u9500: \u542F\u7528 Wall clock \u5206\u6790\u4F1A\u589E\u52A0\u6027\u80FD\u5F00\u9500\uFF0C\u56E0\u6B64\u5728\u540C\u65F6\u5206\u6790 CPU \u548C Wall clock \u65F6\uFF0C\u5EFA\u8BAE\u589E\u52A0 Wall clock \u7684\u95F4\u9694\u3002</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-e</span> cpu <span class="token parameter variable">-i</span> <span class="token number">10</span> <span class="token parameter variable">--wall</span> <span class="token number">100</span> <span class="token parameter variable">-f</span> out.jfr
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="ctimer\u4E8B\u4EF6" tabindex="-1"><a class="header-anchor" href="#ctimer\u4E8B\u4EF6" aria-hidden="true">#</a> <code>ctimer</code>\u4E8B\u4EF6</h2><p><code>ctimer</code> \u4E8B\u4EF6\u662F\u4E00\u79CD\u65B0\u7684 CPU \u91C7\u6837\u6A21\u5F0F\uFF0C\u57FA\u4E8E <code>timer_create</code>\uFF0C\u63D0\u4F9B\u4E86\u65E0\u9700 <code>perf_events</code> \u7684\u7CBE\u786E CPU \u91C7\u6837\u3002</p><p>\u5728\u67D0\u4E9B\u60C5\u51B5\u4E0B\uFF0C<code>perf_events</code> \u53EF\u80FD\u4E0D\u53EF\u7528\uFF0C\u4F8B\u5982\u7531\u4E8E <code>perf_event_paranoid</code> \u8BBE\u7F6E\u6216 <code>seccomp</code> \u9650\u5236\uFF0C\u6216\u8005\u5728\u5BB9\u5668\u73AF\u5883\u4E2D\u3002\u867D\u7136 itimer \u4E8B\u4EF6\u53EF\u4EE5\u5728\u5BB9\u5668\u4E2D\u5DE5\u4F5C\uFF0C\u4F46\u53EF\u80FD\u5B58\u5728\u91C7\u6837\u4E0D\u51C6\u786E\u7684\u95EE\u9898\u3002</p><p><code>ctimer</code> \u4E8B\u4EF6\u7ED3\u5408\u4E86 <code>cpu</code> \u548C <code>itimer</code> \u7684\u4F18\u70B9\uFF1A</p><ul><li>\u9AD8\u51C6\u786E\u6027\uFF1A\u63D0\u4F9B\u7CBE\u786E\u7684 CPU \u91C7\u6837\u3002</li><li>\u5BB9\u5668\u53CB\u597D\uFF1A\u9ED8\u8BA4\u5728\u5BB9\u5668\u4E2D\u53EF\u7528\u3002</li><li>\u4F4E\u8D44\u6E90\u6D88\u8017\uFF1A\u4E0D\u6D88\u8017\u6587\u4EF6\u63CF\u8FF0\u7B26\u3002</li></ul>`,8),Be=e("strong",null,[a("\u8BF7\u6CE8\u610F\uFF0C"),e("code",null,"ctimer"),a(" \u4E8B\u4EF6\u76EE\u524D\u4EC5\u5728 "),e("code",null,"Linux"),a(" \u4E0A\u652F\u6301\uFF0C\u4E0D\u652F\u6301 "),e("code",null,"macOS"),a("\u3002")],-1),We=a(" \u53EF\u53C2\u8003 "),Ae={href:"https://github.com/async-profiler/async-profiler/issues/855",target:"_blank",rel:"noopener noreferrer"},De=a("async-profiler Github Issues"),Ve=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),Ke=i(`<p>\u793A\u4F8B\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-e</span> ctimer <span class="token parameter variable">-o</span> jfr <span class="token parameter variable">-f</span> ./out-test.jfr
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="vtable\u7279\u6027" tabindex="-1"><a class="header-anchor" href="#vtable\u7279\u6027" aria-hidden="true">#</a> <code>vtable</code>\u7279\u6027</h2><p>\u5728\u67D0\u4E9B\u5E94\u7528\u7A0B\u5E8F\u4E2D\uFF0C\u5927\u91CF\u7684 CPU \u65F6\u95F4\u82B1\u8D39\u5728\u8C03\u7528 <code>megamorphic</code> \u7684\u865A\u65B9\u6CD5\u6216\u63A5\u53E3\u65B9\u6CD5\u4E0A\uFF0C\u8FD9\u5728\u6027\u80FD\u5206\u6790\u4E2D\u663E\u793A\u4E3A <code>vtable stub</code> \u6216 <code>itable stub</code>\u3002\u8FD9\u65E0\u6CD5\u5E2E\u52A9\u6211\u4EEC\u4E86\u89E3\u7279\u5B9A\u8C03\u7528\u70B9\u4E3A\u4F55\u662F<code>megamorphic</code> \u4EE5\u53CA\u5982\u4F55\u4F18\u5316\u5B83\u3002</p><p>vtable \u7279\u6027\u53EF\u4EE5\u5728<code> vtable stub</code> \u6216 <code>itable stub</code> \u4E4B\u4E0A\u6DFB\u52A0\u4E00\u4E2A\u4F2A\u5E27\uFF0C\u663E\u793A\u5B9E\u9645\u8C03\u7528\u7684\u5BF9\u8C61\u7C7B\u578B\u3002\u8FD9\u6709\u52A9\u4E8E\u6E05\u695A\u5730\u4E86\u89E3\u5728\u7279\u5B9A\u8C03\u7528\u70B9\uFF0C\u4E0D\u540C\u63A5\u6536\u8005\u7684\u6BD4\u4F8B\u3002</p>`,5),ze=a("\u8BE5\u7279\u6027\u9ED8\u8BA4\u7981\u7528\uFF0C\u53EF\u4EE5\u901A\u8FC7 "),qe=e("code",null,"-F vtable",-1),He=a(" \u9009\u9879\u542F\u7528\uFF08\u6216\u4F7F\u7528 "),Xe=e("code",null,"features=vtable",-1),Ye=a("\uFF09\u3002 \u53EF\u53C2\u8003 "),Qe={href:"https://github.com/async-profiler/async-profiler/issues/736",target:"_blank",rel:"noopener noreferrer"},Ze=a("async-profiler Github Issues"),ea=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),aa=i(`<p>\u793A\u4F8B\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-F</span> vtable
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="comptask-\u7279\u6027" tabindex="-1"><a class="header-anchor" href="#comptask-\u7279\u6027" aria-hidden="true">#</a> <code>comptask</code> \u7279\u6027</h2><p><code>profiler</code> \u91C7\u6837 JIT \u7F16\u8BD1\u5668\u7EBF\u7A0B\u4EE5\u53CA Java \u7EBF\u7A0B\uFF0C\u53EF\u4EE5\u663E\u793A JIT \u7F16\u8BD1\u6240\u6D88\u8017\u7684 CPU \u767E\u5206\u6BD4\u3002\u7136\u800C\uFF0CJava \u65B9\u6CD5\u7684\u7F16\u8BD1\u8D44\u6E90\u6D88\u8017\u5404\u4E0D\u76F8\u540C\uFF0C\u4E86\u89E3\u54EA\u4E9B\u7279\u5B9A\u7684 Java \u65B9\u6CD5\u5728\u7F16\u8BD1\u65F6\u6D88\u8017\u6700\u591A\u7684 CPU \u65F6\u95F4\u975E\u5E38\u6709\u7528\u3002</p><p><code>comptask</code> \u7279\u6027\u53EF\u4EE5\u5728 <code>C1/C2</code> \u7684\u5806\u6808\u8DDF\u8E2A\u4E2D\u6DFB\u52A0\u4E00\u4E2A\u865A\u62DF\u5E27\uFF0C\u663E\u793A\u5F53\u524D\u6B63\u5728\u7F16\u8BD1\u7684\u4EFB\u52A1\uFF0C\u5373\u6B63\u5728\u7F16\u8BD1\u7684 Java \u65B9\u6CD5\u3002</p>`,5),sa=a("\u8BE5\u7279\u6027\u9ED8\u8BA4\u7981\u7528\uFF0C\u53EF\u4EE5\u901A\u8FC7"),na=e("code",null," -F comptask",-1),ia=a(" \u9009\u9879\u542F\u7528\uFF08\u6216\u4F7F\u7528 "),ra=e("code",null,"features=comptask",-1),oa=a("\uFF09\u3002 \u53EF\u53C2\u8003 "),la={href:"https://github.com/async-profiler/async-profiler/issues/777",target:"_blank",rel:"noopener noreferrer"},ta=a("async-profiler Github Issues"),da=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),ca=i(`<p>\u793A\u4F8B\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">-F</span> comptask
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="\u914D\u7F6E\u66FF\u4EE3\u7684\u5206\u6790\u4FE1\u53F7" tabindex="-1"><a class="header-anchor" href="#\u914D\u7F6E\u66FF\u4EE3\u7684\u5206\u6790\u4FE1\u53F7" aria-hidden="true">#</a> \u914D\u7F6E\u66FF\u4EE3\u7684\u5206\u6790\u4FE1\u53F7</h2><p><code>profiler</code> \u4F7F\u7528 <code>POSIX</code> \u4FE1\u53F7\u6765\u8FDB\u884C\u6027\u80FD\u5206\u6790\u3002\u9ED8\u8BA4\u60C5\u51B5\u4E0B\uFF0C<code>SIGPROF</code> \u7528\u4E8E <code>CPU</code> \u5206\u6790\uFF0C<code>SIGVTALRM</code> \u7528\u4E8E <code>Wall-Clock</code> \u5206\u6790\u3002\u7136\u800C\uFF0C\u5982\u679C\u5E94\u7528\u7A0B\u5E8F\u4E5F\u4F7F\u7528\u8FD9\u4E9B\u4FE1\u53F7\uFF0C\u6216\u8005\u5E0C\u671B\u540C\u65F6\u8FD0\u884C\u591A\u4E2A <code>profiler</code> \u5B9E\u4F8B\uFF0C\u8FD9\u53EF\u80FD\u4F1A\u5BFC\u81F4\u4FE1\u53F7\u51B2\u7A81\u3002</p>`,4),pa=a("\u73B0\u5728\uFF0C\u53EF\u4EE5\u4F7F\u7528 "),ha=e("code",null,"signal",-1),ua=a(" \u53C2\u6570\u6765\u914D\u7F6E\u7528\u4E8E\u5206\u6790\u7684\u4FE1\u53F7\uFF0C\u4EE5\u907F\u514D\u51B2\u7A81\u3002 \u53EF\u53C2\u8003 "),va={href:"https://github.com/async-profiler/async-profiler/issues/759",target:"_blank",rel:"noopener noreferrer"},ma=a("async-profiler Github Issues"),ba=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),fa=i(`<p>\u8BED\u6CD5</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--signal</span> <span class="token operator"><</span>\u4FE1\u53F7\u53F7\u7801<span class="token operator">></span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u5982\u679C\u9700\u8981\u5206\u522B\u6307\u5B9A CPU \u548C Wall-Clock \u5206\u6790\u7684\u4FE1\u53F7\uFF0C\u53EF\u4EE5\u4F7F\u7528\u4EE5\u4E0B\u8BED\u6CD5\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--signal</span> <span class="token operator"><</span>CPU\u4FE1\u53F7\u53F7\u7801<span class="token operator">></span>/<span class="token operator"><</span>Wall\u4FE1\u53F7\u53F7\u7801<span class="token operator">></span>
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="clock-\u9009\u9879" tabindex="-1"><a class="header-anchor" href="#clock-\u9009\u9879" aria-hidden="true">#</a> <code>--clock</code> \u9009\u9879</h2><p><code>--clock</code> \u9009\u9879\u5141\u8BB8\u7528\u6237\u63A7\u5236\u7528\u4E8E\u91C7\u6837\u65F6\u95F4\u6233\u7684\u65F6\u949F\u6E90\u3002\u8FD9\u5BF9\u4E8E\u9700\u8981\u5C06 <code>profiler</code> \u7684\u6570\u636E\u4E0E\u5176\u4ED6\u5DE5\u5177\u7684\u6570\u636E\u8FDB\u884C\u65F6\u95F4\u6233\u5BF9\u9F50\u7684\u573A\u666F\u975E\u5E38\u6709\u7528\u3002</p><p>\u7528\u6CD5</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--clock</span> <span class="token operator"><</span>tsc<span class="token operator">|</span>monotonic<span class="token operator">></span>
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>\u53C2\u6570</p>`,9),_a=e("li",null,[e("code",null,"tsc"),a("\uFF1A\u4F7F\u7528 CPU \u7684\u65F6\u95F4\u6233\u8BA1\u6570\u5668\uFF08"),e("code",null,"RDTSC"),a("\uFF09\u3002\u8FD9\u662F\u9ED8\u8BA4\u9009\u9879\uFF0C\u63D0\u4F9B\u9AD8\u7CBE\u5EA6\u7684\u65F6\u95F4\u6233\u3002")],-1),ga=e("code",null,"monotonic",-1),ka=a("\uFF1A\u4F7F\u7528\u64CD\u4F5C\u7CFB\u7EDF\u7684\u5355\u8C03\u65F6\u949F\uFF08"),xa=e("code",null,"CLOCK_MONOTONIC",-1),ya=a("\uFF09\u3002\u8FD9\u6709\u52A9\u4E8E\u5728\u591A\u79CD\u6570\u636E\u6E90\u4E4B\u95F4\u5BF9\u9F50\u65F6\u95F4\u6233\u3002 \u53EF\u53C2\u8003 "),Ca={href:"https://github.com/async-profiler/async-profiler/issues/723",target:"_blank",rel:"noopener noreferrer"},ja=a("async-profiler Github Issues"),Ja=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),Sa=i(`<p>\u793A\u4F8B :</p><p>\u4F7F\u7528 <code>CLOCK_MONOTONIC</code> \u4F5C\u4E3A\u65F6\u95F4\u6233\u6E90\uFF1A</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--clock</span> monotonic
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p><strong>\u6CE8\u610F\u4E8B\u9879:</strong></p><ul><li>\u5F53\u9700\u8981\u5C06 <code>profiler</code> \u7684\u6570\u636E\u4E0E\u5176\u4ED6\u4F7F\u7528 <code>CLOCK_MONOTONIC</code> \u7684\u5DE5\u5177\uFF08\u4F8B\u5982 <code>perf</code>\uFF09\u7684\u6570\u636E\u8FDB\u884C\u5BF9\u9F50\u65F6\uFF0C\u4F7F\u7528 <code>--clock monotonic</code>\u3002</li><li>\u5728\u4F7F\u7528 <code>jfrsync</code> \u6A21\u5F0F\u65F6\uFF0C\u8BF7\u8C28\u614E\u4F7F\u7528 <code>--clock</code> \u9009\u9879\uFF0C\u56E0\u4E3A JVM \u548C <code>profiler</code> \u53EF\u80FD\u4F7F\u7528\u4E0D\u540C\u7684\u65F6\u95F4\u6233\u6E90\uFF0C\u8FD9\u53EF\u80FD\u5BFC\u81F4\u7ED3\u679C\u4E0D\u4E00\u81F4\u3002</li></ul><h2 id="norm-\u9009\u9879" tabindex="-1"><a class="header-anchor" href="#norm-\u9009\u9879" aria-hidden="true">#</a> <code>--norm</code> \u9009\u9879</h2><p>\u5728 Java 20 \u53CA\u66F4\u65E9\u7684\u7248\u672C\u4E2D\uFF0C\u7F16\u8BD1\u5668\u4E3A <code>lambda</code> \u8868\u8FBE\u5F0F\u751F\u6210\u7684\u65B9\u6CD5\u540D\u79F0\u5305\u542B\u552F\u4E00\u7684\u6570\u5B57\u540E\u7F00\u3002\u4F8B\u5982\uFF0C\u540C\u4E00\u4EE3\u7801\u4F4D\u7F6E\u5B9A\u4E49\u7684 <code>lambda</code> \u8868\u8FBE\u5F0F\uFF0C\u53EF\u80FD\u4F1A\u751F\u6210\u591A\u4E2A\u4E0D\u540C\u7684\u5E27\u540D\u79F0\uFF0C\u56E0\u4E3A\u6BCF\u4E2A <code>lambda</code> \u65B9\u6CD5\u7684\u540D\u79F0\u90FD\u4F1A\u9644\u52A0\u4E00\u4E2A\u552F\u4E00\u7684\u6570\u5B57\u540E\u7F00\uFF08\u5982 <code>lambda$method$0</code>\u3001<code>lambda$method$1</code> \u7B49\uFF09\u3002\u8FD9\u4F1A\u5BFC\u81F4\u903B\u8F91\u4E0A\u76F8\u540C\u7684\u5806\u6808\u65E0\u6CD5\u5728\u706B\u7130\u56FE\u4E2D\u5408\u5E76\uFF0C\u589E\u52A0\u4E86\u6027\u80FD\u5206\u6790\u7684\u590D\u6742\u6027\u3002</p>`,7),Fa=a("\u4E3A\u4E86\u89E3\u51B3\u8FD9\u4E2A\u95EE\u9898\uFF0C"),Ga=e("code",null,"profiler",-1),Oa=a(" \u65B0\u589E\u4E86 "),Pa=e("code",null,"--norm",-1),Ra=a(" \u9009\u9879\uFF0C\u53EF\u4EE5\u5728\u751F\u6210\u8F93\u51FA\u65F6\u81EA\u52A8\u89C4\u8303\u5316\u65B9\u6CD5\u540D\u79F0\uFF0C\u53BB\u9664\u8FD9\u4E9B\u6570\u5B57\u540E\u7F00\uFF0C\u4F7F\u76F8\u540C\u7684\u5806\u6808\u80FD\u591F\u6B63\u786E\u5730\u5408\u5E76\u3002 \u53EF\u53C2\u8003 "),Ia={href:"https://github.com/async-profiler/async-profiler/issues/832",target:"_blank",rel:"noopener noreferrer"},Ma=a("async-profiler Github Issues"),Na=a(" \u4E86\u89E3\u66F4\u591A\u4FE1\u606F\u3002"),wa=i(`<p><strong>\u793A\u4F8B:</strong></p><p>\u751F\u6210\u89C4\u8303\u5316\u7684\u706B\u7130\u56FE:</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>profiler start <span class="token parameter variable">--norm</span>
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|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div>`,3);function La(Ta,Ua){const s=c("ExternalLinkIcon");return t(),d("div",null,[h,e("p",null,[e("a",u,[v,m,n(s)])]),e("div",b,[f,e("p",null,[_,e("a",g,[k,n(s)]),x])]),y,C,e("p",null,[j,J,e("a",S,[F,n(s)]),G]),O,e("p",null,[P,e("a",R,[I,n(s)]),M,N,w,L,T,U,E]),$,e("p",null,[B,e("a",W,[A,n(s)]),D,V,K]),z,e("p",null,[q,e("a",H,[X,n(s)]),Y]),Q,e("p",null,[Z,e("a",ee,[ae,n(s)])]),se,e("p",null,[ne,ie,re,oe,le,te,de,ce,pe,he,ue,ve,me,e("a",be,[fe,n(s)]),_e,e("a",ge,[ke,n(s)]),xe]),ye,e("p",null,[Ce,je,Je,Se,Fe,Ge,Oe,e("a",Pe,[Re,n(s)]),Ie]),Me,Ne,we,e("p",null,[Le,e("a",Te,[Ue,n(s)]),Ee]),$e,e("p",null,[Be,We,e("a",Ae,[De,n(s)]),Ve]),Ke,e("p",null,[ze,qe,He,Xe,Ye,e("a",Qe,[Ze,n(s)]),ea]),aa,e("p",null,[sa,na,ia,ra,oa,e("a",la,[ta,n(s)]),da]),ca,e("p",null,[pa,ha,ua,e("a",va,[ma,n(s)]),ba]),fa,e("ul",null,[_a,e("li",null,[ga,ka,xa,ya,e("a",Ca,[ja,n(s)]),Ja])]),Sa,e("p",null,[Fa,Ga,Oa,Pa,Ra,e("a",Ia,[Ma,n(s)]),Na]),wa])}const Ba=l(p,[["render",La],["__file","profiler.html.vue"]]);export{Ba as default};
|