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Started [cpu] profiling
< / 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" > 提示< / p > < p > 默认情况下，生成的是 cpu 的火焰图，即 event 为< code > cpu< / code > 。可以用< code > --event< / code > 参数来指定。< / p > < / div > < h2 id = "获取已采集的-sample-的数量" tabindex = "-1" > < a class = "header-anchor" href = "#获取已采集的-sample-的数量" aria-hidden = "true" > #< / a > 获取已采集的 sample 的数量< / h2 > < div class = "language-text ext-text line-numbers-mode" > < pre class = "language-text" > < code > $ profiler getSamples
23
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < h2 id = "查看-profiler-状态" tabindex = "-1" > < a class = "header-anchor" href = "#查看-profiler-状态" aria-hidden = "true" > #< / a > 查看 profiler 状态< / h2 > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ profiler status
< 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
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < p > 可以查看当前 profiler 在采样哪种< code > event< / code > 和采样时间。< / p > < h2 id = "停止-profiler" tabindex = "-1" > < a class = "header-anchor" href = "#停止-profiler" aria-hidden = "true" > #< / a > 停止 profiler< / h2 > < h3 id = "生成-html-格式结果" tabindex = "-1" > < a class = "header-anchor" href = "#生成-html-格式结果" aria-hidden = "true" > #< / a > 生成 html 格式结果< / h3 > < p > 默认情况下，结果文件是< code > html< / code > 格式，也可以用< code > --format< / code > 参数指定：< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ profiler stop < span class = "token parameter variable" > --format< / span > html
profiler output file: /tmp/test/arthas-output/20211207-111550.html
OK
< / 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 > 或者在< code > --file< / code > 参数里用文件名指名格式。比如< code > --file /tmp/result.html< / code > 。< / p > < h2 id = "通过浏览器查看-arthas-output-下面的-profiler-结果" tabindex = "-1" > < a class = "header-anchor" href = "#通过浏览器查看-arthas-output-下面的-profiler-结果" aria-hidden = "true" > #< / a > 通过浏览器查看 arthas-output 下面的 profiler 结果< / h2 > < p > 默认情况下， < a href = "http://localhost:3658/arthas-output/" target = "_blank" rel = "noopener noreferrer" > http://localhost:3658/arthas-output/< span > < svg class = "external-link-icon" xmlns = "http://www.w3.org/2000/svg" aria-hidden = "true" focusable = "false" x = "0px" y = "0px" viewbox = "0 0 100 100" width = "15" height = "15" > < path fill = "currentColor" d = "M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z" > < / path > < polygon fill = "currentColor" points = "45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9" > < / polygon > < / svg > < span class = "external-link-icon-sr-only" > 在新窗口打开< / span > < / span > < / a > 查看到< code > arthas-output< / code > 目录下面的 profiler 结果：< / p > < p > < img src = "/images/arthas-output.jpg" alt = "" > < / p > < p > 点击可以查看具体的结果：< / p > < p > < img src = "/images/arthas-output-svg.jpg" alt = "" > < / p > < div class = "custom-container tip" > < p class = "custom-container-title" > 提示< / p > < p > 如果是 chrome 浏览器，可能需要多次刷新。< / p > < / div > < h2 id = "profiler-支持的-events" tabindex = "-1" > < a class = "header-anchor" href = "#profiler-支持的-events" aria-hidden = "true" > #< / a > profiler 支持的 events< / h2 > < p > 在不同的平台，不同的 OS 下面，支持的 events 各有不同。比如在 macos 下面：< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ profiler list
Basic events:
cpu
alloc
lock
wall
itimer
< / 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 > < / div > < p > 在 linux 下面< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ profiler list
Basic events:
cpu
alloc
lock
wall
itimer
Perf events:
page-faults
context-switches
cycles
instructions
cache-references
cache-misses
branches
branch-misses
bus-cycles
L1-dcache-load-misses
LLC-load-misses
dTLB-load-misses
mem:breakpoint
trace:tracepoint
< / 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 > < / div > < p > 如果遇到 OS 本身的权限/配置问题，然后 ， < code > async-profiler< / code > 本身文档：< a href = "https://github.com/jvm-profiling-tools/async-profiler" target = "_blank" rel = "noopener noreferrer" > async-profiler< span > < svg class = "external-link-icon" xmlns = "http://www.w3.org/2000/svg" aria-hidden = "true" focusable = "false" x = "0px" y = "0px" viewbox = "0 0 100 100" width = "15" height = "15" > < path fill = "currentColor" d = "M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z" > < / path > < polygon fill = "currentColor" points = "45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9" > < / polygon > < / svg > < span class = "external-link-icon-sr-only" > 在新窗口打开< / span > < / span > < / a > < / p > < p > 可以用< code > --event< / code > 参数指定要采样的事件，比如对< code > alloc< / code > 事件进入采样：< / 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
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < h2 id = "恢复采样" tabindex = "-1" > < a class = "header-anchor" href = "#恢复采样" aria-hidden = "true" > #< / a > 恢复采样< / h2 > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ profiler resume
Started < span class = "token punctuation" > [< / span > cpu< span class = "token punctuation" > ]< / span > profiling
< / 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 > 和< code > resume< / code > 的区别是：< code > start< / code > 是新开始采样，< code > resume< / code > 会保留上次< code > stop< / code > 时的数据。< / p > < p > 通过执行< code > profiler getSamples< / code > 可以查看 samples 的数量来验证。< / p > < h2 id = "使用execute来执行复杂的命令" tabindex = "-1" > < a class = "header-anchor" href = "#使用execute来执行复杂的命令" aria-hidden = "true" > #< / a > 使用< code > execute< / code > 来执行复杂的命令< / h2 > < p > 比如开始采样：< / 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 >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < p > 停止采样，并保存到指定文件里：< / 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 >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < p > 具体的格式参考： < a href = "https://github.com/jvm-profiling-tools/async-profiler/blob/v2.5/src/arguments.cpp#L50" target = "_blank" rel = "noopener noreferrer" > arguments.cpp< span > < svg class = "external-link-icon" xmlns = "http://www.w3.org/2000/svg" aria-hidden = "true" focusable = "false" x = "0px" y = "0px" viewbox = "0 0 100 100" width = "15" height = "15" > < path fill = "currentColor" d = "M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z" > < / path > < polygon fill = "currentColor" points = "45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9" > < / polygon > < / svg > < span class = "external-link-icon-sr-only" > 在新窗口打开< / span > < / span > < / a > < / p > < h2 id = "查看所有支持的-action" tabindex = "-1" > < a class = "header-anchor" href = "#查看所有支持的-action" aria-hidden = "true" > #< / a > 查看所有支持的 action< / h2 > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ profiler actions
Supported Actions: < span class = "token punctuation" > [< / span > resume, dumpCollapsed, getSamples, start, list, execute, version, stop, load, dumpFlat, actions, dumpTraces, status< span class = "token punctuation" > ]< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < h2 id = "查看版本" tabindex = "-1" > < a class = "header-anchor" href = "#查看版本" aria-hidden = "true" > #< / a > 查看版本< / h2 > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ profiler version
Async-profiler < span class = "token number" > 1.6< / span > built on Sep < span class = "token number" > 9< / span > < span class = "token number" > 2019< / span >
Copyright < span class = "token number" > 2019< / span > Andrei Pangin
< / 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 = "配置-framebuf-参数" tabindex = "-1" > < a class = "header-anchor" href = "#配置-framebuf-参数" aria-hidden = "true" > #< / a > 配置 framebuf 参数< / h2 > < blockquote > < p > 如果遇到生成的火焰图有 < code > [frame_buffer_overflow]< / code > ，则需要增大 framebuf（ ' 000' 000） ， ， ： < / p > < / blockquote > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > profiler start < span class = "token parameter variable" > --framebuf< / span > < span class = "token number" > 5000000< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < h2 id = "配置-include-exclude-来过滤数据" tabindex = "-1" > < a class = "header-anchor" href = "#配置-include-exclude-来过滤数据" aria-hidden = "true" > #< / a > 配置 include/exclude 来过滤数据< / h2 > < p > 如果应用比较复杂，生成的内容很多，想只关注部分数据，可以通过 include/exclude 来过滤。比如< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > profiler start < span class = "token parameter variable" > --include< / span > < span class = "token string" > ' java/*' < / span > < span class = "token parameter variable" > --include< / span > < span class = "token string" > ' demo/*' < / span > < span class = "token parameter variable" > --exclude< / span > < span class = "token string" > ' *Unsafe.park*' < / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < blockquote > < p > include/exclude 都支持设置多个值 ，但是需要配置在命令行的最后。< / p > < / blockquote > < h2 id = "指定执行时间" tabindex = "-1" > < a class = "header-anchor" href = "#指定执行时间" aria-hidden = "true" > #< / a > 指定执行时间< / h2 > < p > 比如，希望 profiler 执行 300 秒自动结束，可以用 < code > -d< / code > /< code > --duration< / code > 参数指定：< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > profiler start < span class = "token parameter variable" > --duration< / span > < span class = "token number" > 300< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < h2 id = "生成-jfr-格式结果" tabindex = "-1" > < a class = "header-anchor" href = "#生成-jfr-格式结果" aria-hidden = "true" > #< / a > 生成 jfr 格式结果< / h2 > < blockquote > < p > 注意， < code > start< / code > 时配置。如果是在< code > stop< / code > 时指定，则不会生效。< / p > < / blockquote > < div class = "language-text ext-text line-numbers-mode" > < pre class = "language-text" > < code > profiler start --file /tmp/test.jfr
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < p > < code > file< / code > 参数支持一些变量：< / p > < ul > < li > 时间戳： < code > --file /tmp/test-%t.jfr< / code > < / li > < li > 进程 ID： < code > --file /tmp/test-%p.jfr< / code > < / li > < / ul > < p > 生成的结果可以用支持 jfr 格式的工具来查看。比如：< / p > < ul > < li > JDK Mission Control ： < / li > < li > JProfiler ： < / li > < / ul > < h2 id = "生成的火焰图里的-unknown" tabindex = "-1" > < a class = "header-anchor" href = "#生成的火焰图里的-unknown" aria-hidden = "true" > #< / a > 生成的火焰图里的 unknown< / h2 > < ul > < li > https://github.com/jvm-profiling-tools/async-profiler/discussions/409< / li > < / ul > < / div > <!-- [ --> <!-- ] --> < / div > < footer class = "page-meta right-menu-padding" data-v-fdd717e0 > < div class = "meta-item edit-link" > < a class = "external-link meta-item-label" href = "https://github.com/alibaba/arthas/edit/master/site/docs/doc/profiler.md" rel = "noopener noreferrer" target = "_blank" aria-label = "在 GitHub 上编辑此页" > <!-- [ --> <!-- ] --> < span > 在 GitHub 上编辑此页< / span > < span > < svg class = "external-link-icon" xmlns = "http://www.w3.org/2000/svg" aria-hidden = "true" focusable = "false" x = "0px" y = "0px" viewbox = "0 0 100 100" width = "15" height = "15" > < path fill = "currentColor" d = "M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z" > < / path > < polygon fill = "currentColor" points = "45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9" > < / polygon > < / svg > < span class = "external-link-icon-sr-only" > 在新窗口打开< / span > < / span > <!-- [ --> <!-- ] --> < / a > < / div > < div class = "meta-item last-updated" > < span class = "meta-item-label" > Last Updated: < / span > <!-- --> < / div > < div class = "meta-item contributors" > < span class = "meta-item-label" > 贡献者: < / span > < span class = "meta-item-info" > <!-- [ --> <!-- [ --> < span class = "contributor" title = "email: hengyunabc@gmail.com" > hengyunabc< / span > <!-- [ --> , <!-- ] --> <!-- ] --> <!-- [ --> < span class = "contributor" title = "email: i@fatpandac.com" > Fatpandac< / span > <!-- [ --> , <!-- ] --> <!-- ] --> <!-- [ --> < span class = "contributor" title = "email: hollowman186@vip.qq.com" > Hollow Man< / span > <!-- --> <!-- ] --> <!-- ] --> < / span > < / div > < / footer > < nav class = "page-nav right-menu-padding" data-v-fdd717e0 > < p class = "inner" > < span class = "prev" > < a href = "/doc/watch.html" class = "" aria-label = "watch" > <!-- [ --> <!-- ] --> watch <!-- [ --> <!-- ] --> < / a > < / span > < span class = "next" > < a href = "/doc/jfr.html" class = "" aria-label = "jfr" > <!-- [ --> <!-- ] --> jfr <!-- [ --> <!-- ] --> < / a > < / span > < / p > < / nav > <!-- [ --> <!-- ] --> < / main > <!-- ] --> < / div > <!-- --> <!-- ] --> < / div >
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