[lttng-dev] [tracecompass-dev] Question related to LTTng
Ravindra Kumar Meena
rmeena840 at gmail.com
Fri Mar 29 13:10:45 EDT 2019
Thanks to all for the sharing information. It would help me a lot in the
completion of the project at my university.
--Ravindra Kumar Meena
On Fri, Mar 29, 2019 at 8:34 PM Geneviève Bastien <gbastien at versatic.net>
> Hi Ravindra,
> On 2019-03-27 2:49 p.m., Ravindra Kumar Meena wrote:
> > So you have a user space application that generates a trace. It is
>> virtualized, and you want to open it in trace compass to analyze it.
>> Yes. That's what I want to do but it has to in real-time manner.
> Trace Compass does not support live traces. It is made for post-mortem
> analyses, so it works only on complete trace. We briefly supported live
> traces a few years back, but that made the code much more complicated, so
> this support was dropped. TraceCompass is not made for trace monitoring!
>> > I would like to know if there is a way to transfer CTF to Trace Compass
>> in a real-time manner using TCP/UDP.
>> >Would scp work? Just asking.
>> I am supposed to transfer it through only TCP/UDP.
> LTTng does support relaying the data over the network (see
> But Trace Compass does not open traces that are not terminated. The 2.11
> version (not yet released) and master also support session rotation, so you
> can have traces in chunks of say 1 minutes and whenever a chunk is closed,
> it is ready to be opened by Trace Compass. This is as close to live trace
> analysis as you can get.
>> >How can I convert CTF Trace Data to LTTng? Since TraceCompass already
>> understands LTTng Trace Data.
>> >The CTF trace should be openable in Trace Compass. You won't have as
>> many pretty graphs and whatnot, but you can get some basic analyses done
>> with searching and filters. If you want some more advanced analyses, you
>> can code an XML analysis, or use any language you want and parse it to make
>> a LAMI report. Finally you can make your own analysis (and even commit it
>> to the incubator! 😉 😉 ).
>> >The information that I want to analyze and display information
> includes CPU usage, IRQ analysis(IRQ Statistics, IRQ Table, IRQ vs Count,
> IRQ vs Time), Linux Kernel(Control Flow, Resources)
> With an LTTng kernel trace, you can get all that. Add a UST trace to it
> and you can correlate both traces together.
*Ravindra Kumar Meena*,
B. Tech. Computer Science and Engineering,
Indian Institute of Technology (Indian School of Mines)
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