Ok, I'll wait for Jérémie's answer for more details. As I said, my
concern is to have something fully standalone in TMF. But if one has
access to babeltrace and eventual plugins to read-write a CTF trace to
XML, then all the better. We could then import an XML generated by a
python script into TMF, edit it there and then use it to test analyses.
All we have to settle on is the intermediate format that should be used.
I'd go for XML because of the possibility to validate it and have visual
editors.
On 02/03/2014 11:00 AM, Michel Dagenais wrote:
I would expect that the ctf writer API recently added to babeltrace
(currently in master branch), along with the Python bindings that cover
trace read and write APIs, should allow you to implement things like:
- A plugin to read a CTF trace, and output it in an intermediate format
to facilitate edits (e.g. XML as you propose),
- A plugin to read this XML format and output a CTF trace.
Yes, this would indeed be extremely helpful, in XML and/or JSON.
You could also generate the XML trace completely by hand if you like, and
then convert it to CTF with the second plugin I'm relating to above.
The likely scenario is to add a few events by hand.
Another possibility is that the XML description also allows
describing what the trace contains at a slightly higher level. For instance, if
you
have a periodic event happening for a certain amount of time, it would
be described in XML, and then "generated" by the XML-to-CTF
converter.
Do we want to describe this in XML or in Python? We could have "CTF" to "Python
statements" generating XML. Then we could add loops by hand. We could also have CTF to XML,
with hooks to merge Python generated events.
Indeed being able to script a trace would be extremely helpful and
convert it either directly to CTF or to the intermediate format. Some
scenarios for unit test would be to script a custom trace then change a
few events for the test purpose, then either import it in TMF or convert
it to CTF.
Thanks,
Geneviève
In addition, TMF may also want to offer similar functionality, an XML dump of
events and an XML events reader. Indeed, TMF supports a few formats other than
CTF.
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