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  <body for="html-export" id="body" style="margin:0">
    <div class="smartperf smartperf-preview" style="min-height: 99vh;">
      <h1 class="mume-header fontColor">FileSystem的抓取和展示说明</h1>

      <p class="fontColor">FileSystem分析文件系统的信息和活动,比如读和写操作等。</p>
      <h2 class="mume-header fontColor">FileSystem的抓取</h2>

      <h3 class="mume-header fontColor" id="header-index-1">FileSystem抓取配置参数</h3>

      <p class="fontColor">
        <img src="../figures/FileSystem/filesystemsetting.jpg" alt="GitHub Logo" />
        <br />
        配置项说明:
      </p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
Start FileSystem Record:配置项的总开关。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Process:默认配置的是整个系统的,也可选择单进程抓取。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Max Unwind Level:配置抓取调用栈的最大深度。
</pre
          >
        </li>
      </ul>
      <p class="fontColor">
        再点击Record setting,在output file path输入文件名hiprofiler_data_filesystem.htrace,拖动滚动条设置buffer
        size大小是64MB,抓取时长是50s。
        <br />
        <img src="../figures/FileSystem/filesystemrecord.jpg" alt="GitHub Logo" />
        <br />
        点击Trace command,就会根据上面的配置生成抓取命令,点击复制按钮,会将命令行复制。
        <br />
        <img src="../figures/FileSystem/FileSystemcommand.jpg" alt="GitHub Logo" />
        <br />
        输入hdc shell,进入设备,执行命令。
        <br />
        <img src="../figures/FileSystem/FileSystemexcutecommand.jpg" alt="GitHub Logo" />
        <br />
        执行完成后,进入指定目录查看,在/data/local/tmp下就会生成trace文件。
        <br />
        <img src="../figures/FileSystem/FileSystemfile.jpg" alt="GitHub Logo" />
      </p>
      <h3 class="mume-header fontColor" id="header-index-2">FileSystem展示说明</h3>

      <p class="fontColor">
        将抓取的trace文件导入smartperf界面查看。
        <br />
        <img src="../figures/FileSystem/FileSystemsummary.jpg" alt="GitHub Logo" />
      </p>
      <p class="fontColor">界面布局介绍:FileSystem整体界面布局分为3个部分:</p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
红色区域:泳道图。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
绿色区域:详细信息。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
黄色区域:辅助信息(Callstack)。
</pre
          >
        </li>
      </ul>
      <h3 class="mume-header fontColor" id="header-index-3">FileSystem泳道图展示</h3>

      <p class="fontColor">
        FileSystem泳道图按照读操作和写操作展示,鼠标移动都泳道图上,悬浮框会以10ms为周期展示读,写类型系统调用的次数。
        <br />
        <img src="../figures/FileSystem/FileSystemchart.jpg" alt="GitHub Logo" />
        <br />
        按住w键放大界面,悬浮框会显示当前时刻的文件读写次数。
        <br />
        <img src="../figures/FileSystem/FileSystemcount.jpg" alt="GitHub Logo" />
      </p>
      <h3 class="mume-header fontColor" id="header-index-4">FileSystem泳道图的框选功能</h3>

      <p class="fontColor">
        可以对读写操作泳道图进行框选,框选后在最下方的弹出层中会展示框选数据的统计表格,总共有五个tab页。
        <br />
        FileSystem statistics的Tab页如图:
        <br />
        <img src="../figures/FileSystem/FileSystemstatistics.jpg" alt="GitHub Logo" />
      </p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
Syscall/Process: 按照数据类型,进程分类显示。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Count: 系统调用的数量。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Logical Writes:写数据统计。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Logical Reads:读数据统计。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Other Filesystem Bytes:其他数据量。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Duration:总时长。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Min Duration:最小时长。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Avg Duration: 平均时长。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Max Duration:最大时长。
</pre
          >
        </li>
      </ul>
      <p class="fontColor">
        FileSystem Calltree的Tab页如图:
        <br />
        <img src="../figures/FileSystem/FileSystemCalltree.jpg" alt="GitHub Logo" />
      </p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
Call Stack:为经过符号解析后的Callstack,并且给出动态链接库或者进程名的信息。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Local:为该调用方法自身占用的CPU时间。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Weight:为该调用方法占用的CPU时间。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
%:为该调用方法占用的CPU时间占比。
</pre
          >
        </li>
      </ul>
      <p class="fontColor">
        FileSystem Events的Tab页如图:
        <br />
        <img src="../figures/FileSystem/FileSystemevents.jpg" alt="GitHub Logo" />
      </p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
Start: 起始时间。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Duration:时长。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Process:进程名。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Thread:线程名。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Type:操作类型。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
File Descriptor:文件描述符。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
File Path:文件路径。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
First Argument:系统调用的第一个参数。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Second Argument:系统调用的第二个参数。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Third Argument:系统调用的第三个参数。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Fourth Argument:系统调用的第四个参数。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Return:系统调用的返回值。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Error:错误码。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Backtrace:调用栈顶部函数,并显示调用栈深度。
</pre
          >
        </li>
      </ul>
      <p class="fontColor">
        File Descriptor History的Tab页如图:
        <br />
        <img src="../figures/FileSystem/FileSystemhistory.jpg" alt="GitHub Logo" />
      </p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
Start: 起始时间。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Duration:时长。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Process:进程名。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Type:操作类型。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
File Descriptor:文件描述符。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Path:文件路径。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Backtrace:调用栈顶部函数,并显示调用栈深度。
</pre
          >
        </li>
      </ul>
      <p class="fontColor">
        File Descriptor Time Slice的Tab页如图:
        <br />
        <img src="../figures/FileSystem/FileSystemtimeslice.jpg" alt="GitHub Logo" />
      </p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
Open Time: 打开的起始时间。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Open Duration:打开的时长。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Process:进程名。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
File Descriptor:文件描述符。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Path:文件路径。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Backtrace:调用栈顶部函数,并显示调用栈深度。
</pre
          >
        </li>
      </ul>
      <h3 class="mume-header fontColor" id="header-index-5">FileSystem支持多种Options展示风格</h3>

      <p class="fontColor">
        点击FileSystem Calltree的Tab页底部的Options,会有四个CheckBox复选框。
        <br />
        <img src="../figures/FileSystem/FileSystemOptions.jpg" alt="GitHub Logo" />
      </p>
      <ul class="fontColor">
        <li>
          <pre class="smartperf-text fontColor light">
Invert:反向输出调用树。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Hide System so:隐藏系统库文件。
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Hide Event:隐藏事件。 
</pre
          >
        </li>
        <li>
          <pre class="smartperf-text fontColor light">
Hide Thread:隐藏线程。 
</pre
          >
        </li>
      </ul>
      <h3 class="mume-header fontColor" id="header-index-6">FileSystem支持过滤调用栈调用次数的展示风格</h3>

      <p class="fontColor">
        点击FileSystem Calltree的Tab页底部的Sample Count
        Filter,可以填上区间值。过滤出符合该区间值调用次数的调用栈信息。
        <br />
        <img src="../figures/FileSystem/FileSystemsamplecounter.jpg" alt="GitHub Logo" />
      </p>
      <h3 class="mume-header fontColor" id="header-index-7">FileSystem功能的调用栈Group展示-数据分析支持剪裁功能</h3>

      <p class="fontColor"><img src="../figures/FileSystem/FileSystemdatamining.jpg" alt="GitHub Logo" /></p>
      <ul class="fontColor">
        <li>
          <p class="fontColor">
            裁剪Callstack,点击Callstack上一个节点符号,再点击底部Symbol
            Filter按钮,则该符号自动被裁剪掉,同时将该节点往下所有的Callstack内容裁剪掉。
          </p>
        </li>
        <li>
          <p class="fontColor">裁剪Library,点击Library上一个节点符号,再点击底部Library Filter按钮,则该符号自动被裁剪掉,同时将该节点往下所有的Callstack内容裁剪掉。</p>
        </li>
        <li>
          <p class="fontColor">先选中要恢复的内容,再点击Reset按钮,将恢复选中的裁剪内容。</p>
        </li>
      </ul>
      <h3 class="mume-header fontColor" id="header-index-8">FileSystem功能的调用栈Group展示支持按条件过滤</h3>

      <p class="fontColor">
        在Input Filter输入关键字,会显示出带有该关键字的展示信息。
        <br />
        <img src="../figures/FileSystem/FileSysteminputfilter.jpg" alt="GitHub Logo" />
      </p>
      <h3 class="mume-header fontColor"  id="header-index-9">FileSystem辅助信息区展示调用栈</h3>

      <p class="fontColor">
        当在详细信息区选择一个符号时,将展示与该符号相关的完整的调用栈。如下图的Heaviest Stack Trace:
        <br />
        <img src="../figures/FileSystem/FileSystemheaviesttrace.jpg" alt="GitHub Logo" />
      </p>
      <h3 class="mume-header fontColor" id="header-index-10">FileSystem的事件类型的过滤</h3>

      <p class="fontColor">
        通过选择可以过滤是Open类型,还是Close类型事件。
        <br />
        <img src="../figures/FileSystem/filesystemfilter.jpg" alt="GitHub Logo" />
      </p>
      <h3 class="mume-header fontColor" id="header-index-11">FileSystem的火焰图功能</h3>

      <p class="fontColor">
        点击FileSystem Calltre左下角的柱状图的图标,会切换到火焰图页面。
        <br />
        <img src="../figures/FileSystem/FileSystemflame.jpg" alt="GitHub Logo" />
        <br />
        进入到火焰图页面,火焰图的展示跟 Filesystem Calltree
        的tab页的调用栈显示一致,鼠标放到色块上,悬浮框可以显示调用栈名称、所属Lib库、函数地址、耗时及其占比。
        <br />
        <img src="../figures/FileSystem/FileSystemflameshow.jpg" alt="GitHub Logo" />
        <br />
        鼠标左键火焰图,会进入下一级界面,左键上级则返回上一级界面。
        <br />
        <img src="../figures/FileSystem/FileSystemflamelevel.jpg" alt="GitHub Logo" />
      </p>
    </div>

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