<div dir="ltr"><div><div><div>Hi,<br><br></div>In my simulation scenario, I get no output when I enable the application delay tracer. However, when I run the example provided, it works fine. So, are there any preconditions in this example program, which I need to take care of or just following line is enough to collect the application delay metrics?<br><pre><font size="1"><span><span>ndn</span><span>::</span><span>AppDelayTracer</span><span>::</span><span>InstallAll</span><span>(</span><span>"app-delays-trace.txt"</span><span>);</span></span></font></pre>I also want to understand the significance of Connect() function implementation.<br><font size="1"><br>Config::ConnectWithoutContext("/NodeList/" + m_node<br>                                  + "/ApplicationList/*/LastRetransmittedInterestDataDelay",<br>                                MakeCallback(&AppDelayTracer::LastRetransmittedInterestDataDelay, this));<br><br>Config::ConnectWithoutContext("/NodeList/" + m_node + "/ApplicationList/*/FirstInterestDataDelay",<br>                                MakeCallback(&AppDelayTracer::FirstInterestDataDelay, this));<br> <br></font></div>What does ConnectWithoutContext() do? I looked into the Config class, but did not understand what service it really provides. What the attributes (like<br>LastRetransmittedInterestDataDelay and FirstInterestDataDelay) actually mean? Are they predefined anywhere or are they user defined?<br><br>/anil.<br></div><font size="1"><br></font></div>