<div dir="ltr">Hi,<div><br></div><div>Thanks to all for suggestions. Let me describe the problem in more detail.</div><div><br></div><div>I have a QEMU(it is virtualization software like VMware etc.) instance which is running some applications. The QEMU application can generate Trace Data in CTF format which I want to transfer it to Trace Compass for analyzing it. </div><div><br></div><div>I would like to know if there is a way to transfer CTF to Trace Compass in a real-time manner using TCP/UDP.</div><div><br></div><div>and</div><div><br></div><div>How can I convert CTF Trace Data to LTTng? Since TraceCompass already understands LTTng Trace Data.</div><div><br></div><div>P.S: I am a student working on Tracing project at my University.</div><div><br></div><div>Thanks</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 27, 2019 at 11:01 PM Matthew Khouzam <<a href="mailto:matthew.khouzam@ericsson.com">matthew.khouzam@ericsson.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div id="gmail-m_-14738379410950796divtagdefaultwrapper" style="font-size:12pt;color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<p style="margin-top:0px;margin-bottom:0px">Hi Ravindra, <br>
</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">could you please detail what you want to do, there is a decent chance trace compass supports that out of the box.</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">BR,</p>
<p style="margin-top:0px;margin-bottom:0px">Matthew<br>
</p>
</div>
<hr style="display:inline-block;width:98%">
<div id="gmail-m_-14738379410950796divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> <a href="mailto:tracecompass-dev-bounces@eclipse.org" target="_blank">tracecompass-dev-bounces@eclipse.org</a> <<a href="mailto:tracecompass-dev-bounces@eclipse.org" target="_blank">tracecompass-dev-bounces@eclipse.org</a>> on behalf of Genevieve Bastien <<a href="mailto:gbastien@versatic.net" target="_blank">gbastien@versatic.net</a>><br>
<b>Sent:</b> Wednesday, March 27, 2019 1:03:08 PM<br>
<b>To:</b> <a href="mailto:lttng-dev@lists.lttng.org" target="_blank">lttng-dev@lists.lttng.org</a>; Ravindra Kumar Meena; <a href="mailto:tracecompass-dev@eclipse.org" target="_blank">tracecompass-dev@eclipse.org</a><br>
<b>Subject:</b> Re: [tracecompass-dev] [lttng-dev] Question related to LTTng</font>
<div> </div>
</div>
<div class="gmail-m_-14738379410950796BodyFragment"><font size="2"><span style="font-size:11pt">
<div class="gmail-m_-14738379410950796PlainText">Hi Ravindra,<br>
<br>
I'm sending the reply also to the tracecompass mailing list, where it is<br>
more on topic.<br>
<br>
On 2019-03-27 7:23 a.m., Ravindra Kumar Meena wrote:<br>
> Hi Developers,<br>
><br>
> I am working on a project where I want Trace Compass to analyze and<br>
> display some information. I wanna ask a few things:<br>
><br>
> Q1. Is there any way to extend Trace Compass to work trace data in CTF<br>
> format?<br>
<br>
>From what I understand, you have a CTF trace and would like to implement<br>
a specific trace type from it, for example, to be able to add custom<br>
analyses for this specific type. Right?<br>
<br>
You can read the developer documentation on how to add new trace types<br>
[1]. You may want to take a look at the LttngKernelTrace class for an<br>
example of such extension of CTF Trace [2]. There are a few more around<br>
the code, looking at the class hierarchy for CtfTmfTrace will show you<br>
which ones.<br>
<br>
><br>
> Q2. How trace data(CTF) can be converted to Linux kernel trace<br>
> data(LTTng) which Trace Compass already understands?<br>
Kernel traces need to implement IKernelTrace. This interface provides an<br>
event layout (IKernelAnalysisEventLayout) which will define which events<br>
in the trace correspond to common "concepts" of the kernel, like<br>
sched_switches, syscalls, irqs, etc. That's how any kernel trace format<br>
like ftrace, perf and lttng can use common analyses made for kernel. You<br>
would need to implement this event layout for your own trace types.<br>
<br>
<br>
[1]<br>
<a href="http://archive.eclipse.org/tracecompass/doc/org.eclipse.tracecompass.doc.dev/Implementing-a-New-Trace-Type.html#Implementing_a_New_Trace_Type" target="_blank">http://archive.eclipse.org/tracecompass/doc/org.eclipse.tracecompass.doc.dev/Implementing-a-New-Trace-Type.html#Implementing_a_New_Trace_Type</a><br>
<br>
[2]<br>
<a href="https://git.eclipse.org/c/tracecompass/org.eclipse.tracecompass.git/tree/lttng/org.eclipse.tracecompass.lttng2.kernel.core/src/org/eclipse/tracecompass/lttng2/kernel/core/trace/LttngKernelTrace.java" target="_blank">https://git.eclipse.org/c/tracecompass/org.eclipse.tracecompass.git/tree/lttng/org.eclipse.tracecompass.lttng2.kernel.core/src/org/eclipse/tracecompass/lttng2/kernel/core/trace/LttngKernelTrace.java</a><br>
<br>
<br>
Cheers,<br>
<br>
Geneviève<br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
tracecompass-dev mailing list<br>
<a href="mailto:tracecompass-dev@eclipse.org" target="_blank">tracecompass-dev@eclipse.org</a><br>
To change your delivery options, retrieve your password, or unsubscribe from this list, visit<br>
<a href="https://www.eclipse.org/mailman/listinfo/tracecompass-dev" target="_blank">https://www.eclipse.org/mailman/listinfo/tracecompass-dev</a><br>
</div>
</span></font></div>
</div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><font size="4"><b>Ravindra Kumar Meena</b></font>,<div><span style="color:rgb(102,102,102)">B. Tech. Computer Science and Engineering,<br></span></div><div><span style="color:rgb(102,102,102)"><a href="https://www.iitism.ac.in/" style="color:rgb(17,85,204)" target="_blank">Indian Institute of Technology (Indian School of Mines)</a>, Dhanbad</span></div></div></div></div></div>