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<h1 class="mume-header fontColor">TaskPool抓取和展示说明</h1>
<p class="fontColor">
TaskPool分析模块主要展示应用程序使用taskpool时，任务的关联关系，任务调度开销和任务并发度分析情况，任务各阶段耗时情况，线程池的状态统计，队列任务数，任务是否超时。
</p>
<h2 class="mume-header fontColor">TaskPool的抓取</h2>
<h4 class="mume-header fontColor" id="header-index-1">TaskPool的抓取配置参数</h4>
<p class="fontColor">
打开Task pool开关抓取taskpool数据。同时请打开对应的Flags标记(Disabled切换为Enabled)。
<br />
<img src="../figures/Taskpool/taskpoolconfig.jpg" alt="GitHub Logo" />
</p>
<h3 class="mume-header fontColor" id="header-index-2">TaskPool展示说明</h3>
<p class="fontColor">
将抓取的taskpool文件导入到smartperf中，查看任务的关联关系等信息。
<br />
<img src="../figures/Taskpool/taskpoolrow.jpg" alt="GitHub Logo" />
</p>
<h3 class="mume-header fontColor" id="header-index-3">TaskPool的任务关联关系跟踪</h3>
<p class="fontColor">
任务关联关系就是根据任务的executeId，把一个taskpool任务的各个执行的函数调用栈连接起来，用于表示一个任务从开始分发到执行，再到最后任务结束的整个过程。
<br />
<img src="../figures/Taskpool/taskpoolrelation.jpg" alt="GitHub Logo" />
<br />
如上图所示，点击H:Task Perform: taskId : 2, executeId :
2的调用栈会出现红色连线，红色连线展示了executeId是2的任务的关联关系，连接的调用栈分别是：
</p>
<ul class="fontColor">
<li>
<pre class="smartperf-text fontColor light">
H:Task Allocation: taskId : 2, executeId : 2, priority : 1, executeState : 1：任务分发。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
H:Task Perform: taskId : 2, executeId : 2：任务执行。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
H:Task PerformTask End: taskId : 2, executeId : 2, performResult : Successful：任务返回。
</pre
>
</li>
</ul>
<h3 class="mume-header fontColor" id="header-index-4">TaskPool的并发度</h3>
<p class="fontColor">
点选或者框选任务状态为执行会进行任务并发度展示，如图所示并发度是3。
<br />
<img src="../figures/Taskpool/taskpoolconcurrency.jpg" alt="GitHub Logo" />
</p>
<h3 class="mume-header fontColor" id="header-index-5">TaskPool泳道图的点选功能</h3>
<p class="fontColor">
点选taskpool的Slice，展示该taskpool信息的tab页。
<br />
<img src="../figures/Taskpool/taskpoolselect.jpg" alt="GitHub Logo" />
</p>
<ul class="fontColor">
<li>
<pre class="smartperf-text fontColor light">
Name： 任务调用栈名称。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
StartTime： 任务调用栈开始时间。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
Duration：任务调用栈持续时间。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
depth：调用栈层级。
</pre
>
</li>
</ul>
<h3 class="mume-header fontColor" id="header-index-6">TaskPool泳道图的框选功能</h3>
<p class="fontColor">
框选taskpool的泳道图，展示Frames的tab页。
<br />
<img src="../figures/Taskpool/taskpooldrag.jpg" alt="GitHub Logo" />
</p>
<ul class="fontColor">
<li>
<pre class="smartperf-text fontColor light">
Execute Id： 任务id。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
Task Priority： 任务优先级(HIGH，MEDIUM，LOW)。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
Scheduling Time(ms)：调度耗时(任务执行起始时间 - 任务分发起始时间)。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
Execution Time(ms)：执行耗时(任务执行的duration)。
</pre
>
</li>
<li>
<pre class="smartperf-text fontColor light">
Return Time(ms)：返回耗时(任务返回的结束时间 – 任务执行的结束时间)。
</pre
>
</li>
</ul>
<h3 class="mume-header fontColor" id="header-index-7">TaskPool的队列任务数和线程池里线程状态统计</h3>
<p class="fontColor">
<img src="../figures/Taskpool/taskpoolnum.jpg" alt="GitHub Logo" />
<br />
如上图，H:threadNum，H:runningThreadNum，H:idleThreadNum，H:timeoutThreadNum是线程池里线程状态统计，H:taskNum是队列任务数。
</p>
<h3 class="mume-header fontColor" id="header-index-8">TaskPool的任务超时退出</h3>
<p class="fontColor">
在带有H:Thread Timeout Exit的调用栈的泳道图会采用黄色圆圈，中间为白色反叹号标记，代表任务超时退出。
<br />
<img src="../figures/Taskpool/taskpoolexit.jpg" alt="GitHub Logo" />
</p>
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