<div dir="ltr"><div><div><div>Hi John,<br><br></div>st_trace only traces task events such as releases, deadlines and context-switches of real-time jobs.<br></div></div>For it to work with the bash script, you need to launch your program with rt_launch, found in liblitmus folder.<br>
<div>Otherwise the process will be considered a best-effort task and will not show up in the scheduling trace.<br><br></div><div>Thanks,<br>Felipe<br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
2013/11/13 Litmus ForLinux <span dir="ltr"><<a href="mailto:litmustiger@gmail.com" target="_blank">litmustiger@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi,<div><br></div><div>I am a novice in Linux Kernel coding and I have found LITMUS to be interesting. I compiled and installed LITMUS-RT in my Linux (Ubuntu 12.04) as per the instructions given in the LITMUS website. Also I compiled feather trace tool in my LITMUS system.(including LIBLITMUS dependencies).</div>
<div><br></div><div>How to use feather tool and trace the process (by its release and execution time) using the litmus logs. I execute a background process and tried to trace the process using feather tool. Following are the steps : </div>
<div><br></div><div>1. I wrote following shell script (task.sh)-</div><div> ls </div><div> sleep 20</div><div> ls</div><div> sleep 20</div><div><br></div><div>Then I executed the script in the background - sh task.sh &</div>
<div>2. Once the process starts to run in the background, I executed st_trace immediately.</div><div>3. Trace tool starts executing and it gives a message - <br>"Press Enter to end tracing" </div><div>I pressed enter after some time and got following - </div>
<div>"Disabling 10 events .... /dev/litmus_sched_trace1: 0 bytes read."</div><div><br></div><div>Because of this, are no contents inside the log file. If I try to execute some other task as mentioned in the feather trace tool documentation, "./st_trace global-exp" I encounter same "0 bytes read" message. </div>
<div><br></div><div>Please help me to resolve this issue. I want to have to log file generated.</div><div><br></div><div>Thanks</div><div>John</div><div><br></div></div>
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