[ltt-dev] migrating from lttctl.40 to lttctl.47

[Mathieu Desnoyers]

* Laurent Chavey (chavey at google.com) wrote:
> in lttctl 40, we use to have xml files describing the various facilities.
> when migrating to a newer version of lttng, I noticed that the facilities
> are not present anymore.
> 
> - what do we do about those xml files, are they still needed ?
>    if not, then how are custom facilities supported ?
> 
> thx
> 

Hi Laurent,

The event descriptions are now fully contained in the markers. The
kernel exports the event description through the control/facilities_*
channel files automatically.

So, basically, adding a new event is as simple as adding a new marker in
the kernel code.

Userspace tracing work is "work in progress", but works work x86 and
will soon work for x86_64. It will use a userspace version of the marker
infrastructure.

Mathieu


-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68