[ltt-dev] LTTng userspace tracing

Andrew McDermott andrew.mcdermott at windriver.com
Fri May 15 11:24:58 EDT 2009

Hi Mathieu,

> * Andrew McDermott (andrew.mcdermott at windriver.com) wrote:
>> Hi,
>> I was reading:
>>     http://ltt.polymtl.ca/svn/trunk/lttv/doc/developer/ust.html 
>> and wondered if there was an implementation based on this design.  I had
>> a poke around the SVN repo but it wasn't clear to me if this directory:
>>     http://ltt.polymtl.ca/svn/trunk/markers-userspace/
>> was related.
> Hi Andrew,
> Yes, we have a working userspace implementation, but we are clearing out
> the last details involved with distributing it under the LGPL license.
> There are a few GPL dependencies we are taking care of.
> E.g., we just had the OK from IBM to re-license their contribution to my
> userspace RCU library to LGPL, which was the most important piece of the
> puzzle. The rest is mostly atomic operations and a rcu list iteration.
> And the last thing we would want is people to think that we are
> distributing the userspace tracing library under a license too
> restrictive for their use.
> Second answer : the markers-userspace directory content has been re-used
> in the implementation I think, but has been repackaged. I am putting
> Pierre-Marc in CC, who did the userspace tracing port of LTTng.


One more question: is it feasible (within reason) for me to backport
this to say linux-2.6.14 or linux-2.6.21.

> Thanks for the interest you show :)

It would/will be extremely useful!


> Mathieu
>> Thanks,
>> Andy.
>> _______________________________________________
>> ltt-dev mailing list
>> ltt-dev at lists.casi.polymtl.ca
>> http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev


More information about the lttng-dev mailing list