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<body for="html-export" id="body">
<div class="mume mp">
    <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">1.FileSystem的抓取</h2>

    <h3 class="mume-header fontColor">1.1.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="font-text light fontColor">Start FileSystem Record:配置项的总开关
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Process：离线模式下配置的是整个系统的
</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64M,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">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，其中</p>
    <ul class="fontColor">
        <li>
<pre class="font-text light fontColor">红色区域：泳道图
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">绿色区域：详细信息
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">黄色区域：辅助信息(Callstack)
</pre>
        </li>
    </ul>
    <h3 class="mume-header fontColor">2.1.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">
        2.2.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
        FileSystem statistics的Tab页<br>
        <img src="../figures/fileSystem/FileSystemstatistics.jpg" alt="GitHub Logo"></p>
    <ul class="fontColor">
        <li>
<pre class="font-text light fontColor">Syscall/Process: 按照数据类型,进程分类显示
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Count: 系统调用的数量
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Logical Writes:写数据统计
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Logical Reads:读数据统计
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Other Filesystem Bytes:其他数据量
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Duration:总时长
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Min Duration：最小时长
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Avg Duration: 平均时长
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Max Duration：最大时长
</pre>
        </li>
    </ul>
    <p class="fontColor">FileSystem Calltree的Tab页<br>
        <img src="../figures/fileSystem/FileSystemCalltree.jpg" alt="GitHub Logo"></p>
    <ul class="fontColor">
        <li>
<pre class="font-text light fontColor">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="font-text light fontColor">Local:为该调用方法自身占用的CPU时间
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Weight:调用方法的执行占比
</pre>
        </li>
    </ul>
    <p class="fontColor">FileSystem Events的Tab页<br>
        <img src="../figures/fileSystem/FileSystemevents.jpg" alt="GitHub Logo"></p>
    <ul class="fontColor">
        <li>
<pre class="font-text light fontColor">Start: 起始时间
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Duration:时长
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Process:进程名
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Thread:线程名
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Firsr Argument:系统调用的第一个参数
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Second Argument:系统调用的第二个参数
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Third Argument:系统调用的第三个参数
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Fourth Argument:系统调用的第四个参数
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Retrun:系统调用的返回值
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Error:错误码
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">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<br>
        <img src="../figures/fileSystem/FileSystemhistory.jpg" alt="GitHub Logo"></p>
    <ul class="fontColor">
        <li>
<pre class="font-text light fontColor">Start: 起始时间
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Duration:时长
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Process:进程名
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Type:操作类型
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">File Descriptor:fd
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">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<br>
        <img src="../figures/fileSystem/FileSystemtimeslice.jpg" alt="GitHub Logo"></p>
    <ul class="fontColor">
        <li>
<pre class="font-text light fontColor">Open Time: 打开的起始时间
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Open Duration:打开的时长
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Process:进程名
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">File Descriptor:fd
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Backtrace:调用栈顶部函数,并显示调用栈深度
</pre>
        </li>
    </ul>
    <h3 class="mume-header fontColor">2.3.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,会有两个CheckBox复选框<br>
        <img src="../figures/fileSystem/FileSystemOptions.jpg" alt="GitHub Logo"></p>
    <ul class="fontColor">
        <li>
<pre class="font-text light fontColor">Invert:反向输出调用树
</pre>
        </li>
        <li>
<pre class="font-text light fontColor">Hide System so:隐藏系统库文件
</pre>
        </li>
    </ul>
    <h3 class="mume-header fontColor">2.4.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 Counter 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">2.5.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 Filter按钮，则该库文件符号下所有的子节点也被裁剪</p>
        </li>
        <li>
            <p class="fontColor">点击Reset按钮，将恢复选中的裁剪内容</p>
        </li>
    </ul>
    <h3 class="mume-header fontColor">2.6.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">2.7.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="fontColor">2.8.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="fontColor">2.9.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Callinfo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和Duration时长<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，右键回到上一级<br>
        <img src="../figures/fileSystem/FileSystemflamelevel.jpg" alt="GitHub Logo"></p>
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