Re: [tracecompass-dev] Trace Compass seems to dispose of some ftrace eve

["Scheler, Fabian (CT RDA IOT SES-DE)" <Fabian.Scheler@xxxxxxxxxxx>]

Hi Geneviève,

> Indeed ftrace support is still very experimental and not complete. We 
> only support(tested) events and function graph in raw format, so the 
> regex may ignore some other events, or they may be parsed incorrectly.

well, I do not think, it is a parsing problem: When I have a trace that 
e.g. only contains a well-known amount of uprobe-events, all of them are 
listed in Trace Compass.

When I have a trace that contains both - function_graph-entries and 
entries resulting from uprobe-events, then these uprobe-events somehow 
get lost.

> We do not have any logs of the trace parsing unfortunately, but if you 
> want to debug how a line is parsed, you could look at the 
> GenericFtraceField class in the 
> org.eclipse.tracecompass.incubator.ftrace.core plugin, the method 
> parseLine(). For instance, it used not to decode the function_graph 
> events correctly, just because the value was an hexadecimal string and 
> it expected a decimal. So it was easily fixed.
>
> Let us know if you find any bug or please send a patch upstream if you 
> do fix it, it would be greatly appreciated!

OK, I'll definitely let you know, if I find time to have a look in there 
and find a bug or a fix.

Ciao
Fabian

> Cheers,
>
> Geneviève
>
>
> On 2018-08-09 06:54 AM, Scheler, Fabian (CT RDA IOT SES-DE) wrote:
> > Hi Trace Compassers!
> >
> > I just conducted some experiments with Trace Compass and ftrace and I 
> > noticed that Trace Compass seems to dispose off some of the "normal" 
> > ftrace events, when the trace contains function_graph-events, but not 
> > all of them.
> >
> > I enabled some custom uprobe-events and I could verify these are part 
> > of the trace-output (I was able to find them e.g. via grep), but these 
> > events were not listed in Trace Compass.
> >
> > How can I debug if the trace-parser dislikes some parts of the trace? 
> > Is it possible to get a log of the trace-parser or similar?
> >
> > Ciao
> > Fabian
> >
> >
> > _______________________________________________
> > tracecompass-dev mailing list
> > tracecompass-dev@xxxxxxxxxxx
> > To change your delivery options, retrieve your password, or unsubscribe from this list, visit
> > https://dev.eclipse.org/mailman/listinfo/tracecompass-dev
>
>
> _______________________________________________
> tracecompass-dev mailing list
> tracecompass-dev@xxxxxxxxxxx
> To change your delivery options, retrieve your password, or unsubscribe from this list, visit
> https://dev.eclipse.org/mailman/listinfo/tracecompass-dev

--
With best regards,
Dr. Fabian Scheler

Siemens AG
Corporate Technology
Research and Development for Digitalization and Automation
CT RDA IOT SES-DE
Guenther-Scharowsky-Str. 1
91058 Erlangen, Germany
Tel.: +49 1522 1702973
Mobile: +49 1522 1702973
mailto:fabian.scheler@xxxxxxxxxxx

www.siemens.com/ingenuityforlife

Siemens Aktiengesellschaft: Chairman of the Supervisory Board: Gerhard 
Cromme; Managing Board: Joe Kaeser, Chairman, President and Chief 
Executive Officer; Roland Busch, Lisa Davis, Klaus Helmrich, Janina 
Kugel, Cedrik Neike, Michael Sen, Ralf P. Thomas; Registered offices: 
Berlin and Munich, Germany; Commercial registries: Berlin 
Charlottenburg, HRB 12300, Munich, HRB 6684; WEEE-Reg.-No. DE 23691322

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature