[ltt-dev] LTTng userspace tracing

[Andrew McDermott]

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.

Thanks.

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!

--andy

>
> Mathieu
>
>> Thanks,
>> Andy.
>> 
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>> 

-- 
andy