[ltt-dev] Traces data alignment

[Mathieu Desnoyers]

* Jérôme Stadelmann (jerome.stadelmann at heig-vd.ch) wrote:
> On jeudi 19 mars 2009 18:00:01 Mathieu Desnoyers wrote:
> > * Jérôme Stadelmann (jerome.stadelmann at heig-vd.ch) wrote:
> > > Hi everybody,
> > > 
> > > I'm working on a LTTng traces parser and I'm a little bit blocked on the alignment. Can someone please explain how and where it is coded ?
> > 
> > The lttv lib "ltttraceread" should do that for you.
>  
> > > What are the roles of the alignment defined in the traces header and the one defined in the metadata file in the core_marker_id ?
> > > 
> > 
> > They tell that a specific tracefile content is aligned or not, and if
> > the content of a given event is aligned or not. You should really have
> > at least a look at the ltt lib traceread reference implementation.
> 
> Thank you. This library helped me a lot. I see that there is an up to 2 byte alignment in the core marker id event definition. Is there the only special case ?
> I've searched the uses of the ltt_align function. Are there other functions to look for ?
> 

Looking at ltt_align use is a good starting point.

Can you point out to the specific package/version/file/line you refer to
for the core marker id "special case" you talk about here ?

Mathieu

> Jerome
>  
> > Mathieu
> > 
> > > Regards,
> > > Jerome
> > > 
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> > > 
> > 
> 

-- 
Mathieu Desnoyers
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